DVM S

AM✴✴✴MXVAFC Series
AM✴✴✴MXVAJC Series

Air Conditioner
installation manual

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Thank you for purchasing this Samsung product.
Contents
Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Preparing for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Selecting installation location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Space requirement for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Base construction and installation of the outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Installing the wind/snow prevention duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Refrigerant pipe installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Electrical wiring work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Air tightness test and vacuum drying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Pipe insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Charging additional refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Basic segment display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Setting outdoor unit option switch and key function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Things to check after completing the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Inspection and test operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Inspection and trial operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Automatic refrigerant amount detection function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Correct Disposal of This Product

(Waste Electrical & Electronic Equipment)

(Applicable in countries with separate collection systems)

This marking on the product, accessories or literature indicates that the product and its electronic accessories (e.g. charger,
headset, USB cable) should not be disposed of with other household waste at the end of their working life. To prevent
possible harm to the environment or human health from uncontrolled waste disposal, please separate these items from
other types of waste and recycle them responsibly to promote the sustainable reuse of material resources.
Household users should contact either the retailer where they purchased this product, or their local government office, for
details of where and how they can take these items for environmentally safe recycling.
Business users should contact their supplier and check the terms and conditions of the purchase contract. This product
and its electronic accessories should not be mixed with other commercial wastes for disposal.

2
Safety precautions
Please follow the following safety information for safety of the installer and the user.

❋❋ DVM S air conditioner uses R-410A refrigerant.

• When using R-410A, moisture or foreign substances may affect the performance and reliability of the product.
Safety precautions must be obeyed when installing the refrigerant pipe.

ENGLISH
• The designed maximum pressure of the system is 4.1MPa(594.6 psi) and therefore select appropriate material and
thickness according to the regulations.
• R-410A is a quasi-azeotrope of two refrigerants and it has to be charged in liquid phase when filling the refrigerant.
(If you charge vapor refrigerant, it may change the blend of the refrigerant and cause product malfunction.)
❋❋ You must connect the indoor units for R-410A refrigerant. Refer to product catalog to find out the models names
for connectable indoor units. (If you connect the indoor units that are not designed for R-410A, it cannot operated
normally.)

❋❋ After completing the installation and trial operation, explain to the user how to use and maintain the product. Also, hand
over this installation manual so that it can be stored by the user.
❋❋ Manufacturer is not responsible for the incidents occurred by improper installation. Installer is responsible for any
installation related claims from the user occurred by neglecting warnings and cautions stated in this manual. (Installer
will be responsible for any service charges that may occur)
❋❋ Generally, system air conditioners should not be relocated after installation. But when it has to be relocated for inevitable
reasons, please contact Samsung’s qualified dealers for system air conditioners.

WARNING • Hazards or unsafe practices that may result in severe personal injury or death.

• Hazards or unsafe practices that may result in minor personal injury (to installer/user) or
CAUTION
property damage.

SEVERE WARNING SIGNS

Consult qualified installer or dealer for installation.
ffWhen installation is done by unqualified person, problems such as water leakage, electric shock or fire may occur.
Installation work must be done properly according to this installation manual.
ffWhen installation is not done properly, it may cause water leakage, electric shock or fire.
When installing the unit in a small room, take measure to keep the refrigerant concentration from exceeding allowable
safety limits in case of refrigerant leakage. Consult the dealer for precautionary measure before the installation.
ffWhen refrigerant leaks and exceed dangerous concentration level, it may cause suffocation accidents.
If any gas or impurities, except R-410A refrigerant, come into the refrigerant pipe, serious problem may occur and it
may cause injury.
Use the supplied accessories, specified components and tools for the installation.
ffDo not use the pipe and the installation product used for the R-22 refrigerant.
ffFailure to use the specified components can cause product fall down, water leakage, electrical shock, and fire. (The pipe
and flare components used for R-22 refrigerant must not be used)
Install the outdoor unit on a hard and even place that can support its weight.
ffIf the place cannot support its weight, the outdoor unit may fall down and it may cause injury.
Wear protective equipment (such as safety gloves, goggles, and headgear) during installation and maintenance works.
Installation/repair technicians may be injured if protective equipment is not properly equipped.

3
Safety precautions
Check the following before installation and service work.
ffBefore welding, remove dangerous and inflammable things that may cause an explosion and fire around the work.
ffBefore welding, remove the refrigerant from inside the pipe or the product.
-- If you perform welding while refrigerant is in the pipe, it may increase the pressure of the refrigerant and cause the pipe
to burst. If the pipe bursts or explodes, it may cause severe injury to the installer.
ffWhen welding, use the nitrogen gas to eliminate oxidation inside the pipe.
Do not modify the product on your own.
ffPotential risk of electric shock, fire, product failure or injury.
Fix the outdoor unit securely on foundation to resist strong wind or earthquake.
ffIf the outdoor unit is not properly fixed, it turns over and accidents may occur.
Electric work must be done by qualified persons, complying the national wiring regulations and installed according to
the instruction stated in the installation manual with leased circuit.
ffCapacity shortage on the leased circuit and improper installation may cause electric shock or fire.
Make sure to perform grounding work.
ffDo not connect the ground wire to a gas pipe, water pipe, lightning rod or telephone grounding. Improper grounding
could cause electric shock.
Wiring must be connected with the designated wires and it must be fixed securely so that it does not apply any external
force to the connection part of the terminals.
ffIf connection for fixation is not properly done, it may cause heat generation or fire.
Neatly arrange the wires in the electrical parts to make sure that electrical cover is closed securely without any gaps.
ffIf the cover is not properly closed, heat may generate on the electrical terminal and cause electric shock or fire.
Exclusive circuit breaker (MCCB, ELB) must be installed to the power supply.
ffWhen overcurrent or current leakage occurs with no circuit breaker installed, power will not be cut-off and it may cause
electric shock or fire.
ffDo not use damaged parts. It may cause fire or electric shock.
You must cut-off the power before you work on, or adjust any power supply part for product installation, maintenance,
repair or any other services.
ffThere is risk of electric shock.
ffEven when the power is off, it is dangerous when you come in contact with inverter PCB, fan PCB since high pressure DC
voltage is charged to those parts.
ffWhen replacing/repairing the PCB, cut-off the power and wait until the DC voltage is discharged before replacing/
repairing them. (Wait for more than 15 minutes to allow it to discharge naturally.)
If the refrigerant gas leaks during the installation, you should ventilate the room.
ffWhen the refrigerant gas gets in contact with flammable substance, it may generate toxic gas.
Gas leakage must be checked after installation is completed.
ffWhen the refrigerant gas gets in contact with flammable substance, it may generate toxic gas.
You can get a frostbite if you get in contact with the leaked refrigerant gas.
Supply power to the product during winter time since the product will operate in protection mode itself when the
temperature decrease below 0°C(32°F).
ffIf you cut-off the power, compressor protection mode cannot be operated and may cause damage to the product.

4
CAUTION SIGNS
Do not install the drain pipe directly to the bottom part of the outdoor unit and built a proper drainage so that water
drains out smoothly. If not, pipe may freeze or bursts during winter time and cause damage to the product or water
leakage.
ffWhen the draining work is not done properly, water leak may occur and cause property damage.
Install the power cable and communication cable of the indoor and outdoor unit at least 1.5m(4.92ft) away from the

ENGLISH
electric appliances and install it at least 2m(6.56ft) away from the lightning conductor.
ffNoise may be generated from the electronic devices, depending on the status of the electric wave.
Install the outdoor unit within the angle stated in the table, according to the height of the building.
ffDo not leave the refrigerant container under the hot sunlight. (There is risk of explosion.)
ffYou must use the appropriate pipes according to the standard since the pressure of the refrigerant is very high.
ffMake sure that the pipes does not get any weaker by welding it too much.
ffMake sure to install the product away from children’s’ reach. (Sharp parts of the heat exchanger is may cause personal
injury and when parts of the product gets damage, it may decrease product’s performance.)
Lighting rod
Protective angle: 25˚~55˚

Height of the building Protection control

20m(65.6 ft) or less 55˚
40m(131.2 ft) or less 35˚
60m(196.9 ft) or less 25˚

Install the indoor unit away from lighting apparatus that uses ballast stabilizer.
ffIf you use the wireless remote control, it may not operate normally due to ballast stabilizer.
Do not install the product in following places.
ffPlace where outdoor unit’s noise and warm air may disturb neighbors. (It may cause property loss.)
ffDo not leave any obstacles around the inlet and outlet of the product. (It may cause damage or accidents.)
ffThe place where there is mineral oil or arsenic acid.
-- Those parts may get damaged due to burned resin and cause water leakage or product may fall.
-- The efficiency of the heat exchanger may reduce or product may break.
ffThe place where corrosive gas such as sulfurous acid gas generates from the vent pipe or air outlet.
-- The copper pipe or connection pipe may corrode and refrigerant may leak.
ffThe place where there is a machine that generates electromagnetic waves.
-- The air conditioner may not operate normally due to problems in control system.
ffThe place where there is a danger of combustible gas leakage or place where thinner or gasoline is handled.
-- (There is risk of fire or explosion.)
ffThe place with carbon fiber or flammable dust.
ffThe place near seashore or hot spring where there is risk of outdoor unit corrosion.

5
Safety precautions
Changes in DVM S (inverter) compare to conventional models that has to noted when installing
ffFor optimal distribution of the refrigerant, you must use Y-joint as branch joint for connecting outdoor units. (To not use
T-joint)
ffYou cannot operate normally if you do not complete the trial operation through outdoor unit key mode. You must use
KEY MODE to run trial operation.
ffDVM S air conditioner uses R-410A refrigerant.
ffCheck the compatibility of other products such as indoor unit, EEV kits etc. which will be connected to DVM S.
ffMake sure to note that outdoor unit combination is different from DVM PLUS III and IV.
ffThe length of maximum piping, level difference, the quantity of connectable indoor units, the installation at the outdoor
joints and the outdoor unit combinations are different from the conventional models.
ffIf the pipe length is over 2m(6.56ft) between outdoor units, make traps to prevent oil stagnation. Oil stagnation may
occur when outdoor unit at the end of module stops while other outdoor units are still in operation.

Preparing for installation

Outdoor unit classification
Classification Small type Large A type Large B type

Appearance

AM140/160/180/200/220✴✴✴, AM220MXVAFC,
Models AM080/100/120✴✴✴
AM220MXVAJC AM240/260/280/300✴✴✴

Packaging material disposition

CAUTION • Safely store or dispose the packaging materials.
-- Sharp metals such as nails or wooden material packaging that may break into pieces become a cause for
personal injury.
-- Make sure to store or dispose the vinyl type packaging material to keep it out of reach of children. Children
may put them over their face, which is very dangerous since it may lead them to suffocation.

6
 Outdoor unit combination
ffMake sure to use an indoor unit that is compatible with DVM S.
ffIndoor units can be connected within the range indicated in following table.
ffIf the total capacity of the connected indoor units exceeds the indicated maximum capacity, cooling capacity of the
indoor unit may decrease.
ffTotal capacity of the connected indoor units can be allowed from 50% to 130% of the total outdoor unit capacity.

ENGLISH
0.5 × Σ(Outdoor unit capacity) ≤ Total capacity of the connected indoor units ≤ 1.3 × Σ(Outdoor unit capacity)
❋❋ You can connect maximum 64 indoor units to the outdoor unit. Maximum quantity of connectable indoor unit is set to 64
since outdoor unit only support up to 64 communication address. Indoor unit address can be assigned from 0~63. If the
indoor unit address was assigned from 64~79, E201 error will occur.
❋❋ Maximum 32 Wall-mount type indoor units with EEV (AM✴✴✴✴NQDCH✴) can be connected.

• Installation combination must be complied when composing outdoor unit combination.

CAUTION

Standard type (AMTTTMXVAFC Series) (Cooling only)

Model name for combination AM080MXVAFC/AZ AM100MXVAFC/AZ AM120MXVAFC/AZ AM140MXVAFC/AZ AM160MXVAFC/AZ

Number of individual outdoor units 1 1 1 1 1
AM080MXVAFC 1
AM100MXVAFC 1
AM120MXVAFC 1
Combined outdoor unit AM140MXVAFC 1
AM160MXVAFC 1
AM180MXVAFC
AM200MXVAFC
Cooling (kW) 22.4 28.0 33.6 40.0 45.0
Nominal capacity
Cooling (Btu/h) 76 400 95 500 114 600 136 500 153 500
Minimum (kW) 11.2 14.0 16.8 20.0 22.5
Total capacity of the Minimum (Btu/h) 38 200 47 800 57 300 68 200 76 800
connected indoor units
(Cooling) Maximum (kW) 29.1 36.4 43.7 52.0 58.5
Maximum (Btu/h) 99 400 124 200 149 000 177 400 199 600
Maximum number of connectable indoor
14 18 21 26 29
units

7
Preparing for installation
Model name for combination AM180MXVAFC/AZ AM200MXVAFC/AZ AM220MXVAFC1AZ AM240MXVAFC1AZ AM260MXVAFC1AZ
Number of individual outdoor units 1 1 2 2 2
AM080MXVAFC
AM100MXVAFC 1
AM120MXVAFC 1 2 1
Combined outdoor unit AM140MXVAFC 1
AM160MXVAFC
AM180MXVAFC 1
AM200MXVAFC 1
Cooling (kW) 50.4 56.0 61.6 67.2 73.6
Nominal capacity
Cooling (Btu/h) 172 000 191 100 210 100 229 200 251 100
Minimum (kW) 25.2 28.0 30.8 33.6 36.8
Total capacity of the Minimum (Btu/h) 86 000 95 500 105 100 114 600 125 500
connected indoor units
(Cooling) Maximum (kW) 65.5 72.8 80.1 87.4 95.7
Maximum (Btu/h) 223 600 248 400 273 200 298 000 326 400
Maximum number of connectable indoor
32 36 40 43 47
units

Model name for combination AM280MXVAFC1AZ AM300MXVAFC1AZ AM320MXVAFC1AZ AM340MXVAFC1AZ AM360MXVAFC1AZ

Number of individual outdoor units 2 2 2 2 2
AM080MXVAFC
AM100MXVAFC
AM120MXVAFC 1 1 1
Combined outdoor unit AM140MXVAFC 1
AM160MXVAFC 1 1
AM180MXVAFC 1
AM200MXVAFC 1 1 1
Cooling (kW) 78.6 84.0 89.6 96.0 101.0
Nominal capacity
Cooling (Btu/h) 268 100 286 600 305 700 327 600 344 600
Minimum (kW) 39.3 42.0 44.8 48.0 50.5
Total capacity of the Minimum (Btu/h) 134 100 143 300 152 800 163 700 172 300
connected indoor units
(Cooling) Maximum (kW) 102.2 109.2 116.5 124.8 131.3
Maximum (Btu/h) 348 600 372 600 397 400 422 300 448 000
Maximum number of connectable indoor
51 54 58 61 64
units

8
 Model name for combination AM380MXVAFC1AZ AM400MXVAFC1AZ AM420MXVAFC1AZ AM440MXVAFC1AZ AM460MXVAFC1AZ
Number of individual outdoor units 2 2 3 3 3
AM080MXVAFC
AM100MXVAFC 1
AM120MXVAFC 1 2 1
Combined outdoor unit AM140MXVAFC 1

ENGLISH
AM160MXVAFC
AM180MXVAFC 1
AM200MXVAFC 1 2 1 1 1
Cooling (kW) 106.4 112.0 117.6 123.2 129.6
Nominal capacity
Cooling (Btu/h) 363 100 382 200 401 200 420 300 442 200
Minimum (kW) 53.2 56.0 58.8 61.6 64.8
Total capacity of the Minimum (Btu/h) 181 500 191 000 200 600 210 100 221 000
connected indoor units
(Cooling) Maximum (kW) 138.3 145.6 152.9 160.2 168.5
Maximum (Btu/h) 472 000 496 800 521 600 546 400 574 800
Maximum number of connectable indoor
64 64 64 64 64
units

Model name for combination AM480MXVAFC1AZ AM500MXVAFC1AZ AM520MXVAFC1AZ AM540MXVAFC1AZ AM560MXVAFC1AZ

Number of individual outdoor units 3 3 3 3 3
AM080MXVAFC
AM100MXVAFC
AM120MXVAFC 1 1 1
Combined outdoor unit AM140MXVAFC 1
AM160MXVAFC 1 1
AM180MXVAFC 1
AM200MXVAFC 1 1 2 2 2
Cooling (kW) 134.6 140.0 145.6 152.0 157.0
Nominal capacity
Cooling (Btu/h) 459 200 477 700 496 800 518 700 535 700
Minimum (kW) 67.3 70.0 72.8 76.0 78.5
Total capacity of the Minimum (Btu/h) 229 600 238 800 248 300 259 200 267 800
connected indoor units
(Cooling) Maximum (kW) 175.0 182.0 189.3 197.6 204.1
Maximum (Btu/h) 597 000 621 000 645 800 674 200 696 400
Maximum number of connectable indoor
64 64 64 64 64
units

9
Preparing for installation
Model name for combination AM580MXVAFC1AZ AM600MXVAFC1AZ AM620MXVAFC1AZ AM640MXVAFC1AZ
Number of individual outdoor units 3 3 4 4
AM080MXVAFC
AM100MXVAFC 1
AM120MXVAFC 1 2
Combined outdoor unit AM140MXVAFC
AM160MXVAFC
AM180MXVAFC 1
AM200MXVAFC 2 3 2 2
Cooling (kW) 162.4 168.0 173.6 179.2
Nominal capacity
Cooling (Btu/h) 554 200 573 300 592 300 611 400
Minimum (kW) 81.2 84.0 86.8 89.6
Total capacity of the Minimum (Btu/h) 277 000 286 500 296 200 305 600
connected indoor units
(Cooling) Maximum (kW) 211.1 218.4 225.7 233.0
Maximum (Btu/h) 720 400 745 200 770 000 794 800
Maximum number of connectable indoor
64 64 64 64
units

Model name for combination AM660MXVAFC1AZ AM680MXVAFC1AZ AM700MXVAFC1AZ AM720MXVAFC1AZ

Number of individual outdoor units 4 4 4 4
AM080MXVAFC
AM100MXVAFC
AM120MXVAFC 1 1 1 1
Combined outdoor unit AM140MXVAFC 1
AM160MXVAFC 1
AM180MXVAFC 1
AM200MXVAFC 2 2 2 3
Cooling (kW) 185.6 190.6 196.0 201.6
Nominal capacity
Cooling (Btu/h) 633 300 650 300 668 800 687 900
Minimum (kW) 92.8 95.3 98.0 100.8
Total capacity of the Minimum (Btu/h) 316 500 325 100 334 300 343 800
connected indoor units
(Cooling) Maximum (kW) 241.3 247.8 254.8 262.1
Maximum (Btu/h) 823 200 845 400 869 400 894 200
Maximum number of connectable indoor
64 64 64 64
units

10
 Model name for combination AM740MXVAFC1AZ AM760MXVAFC1AZ AM780MXVAFC1AZ AM800MXVAFC1AZ
Number of individual outdoor units 4 4 4 4
AM080MXVAFC
AM100MXVAFC
AM120MXVAFC
Combined outdoor unit AM140MXVAFC 1

ENGLISH
AM160MXVAFC 1
AM180MXVAFC 1
AM200MXVAFC 3 3 3 4
Cooling (kW) 208.0 213.0 218.4 224.0
Nominal capacity
Cooling (Btu/h) 709 800 726 800 745 300 764 400
Minimum (kW) 104.0 106.5 109.2 112.0
Total capacity of the Minimum (Btu/h) 354 700 363 300 372 500 382 000
connected indoor units
(Cooling) Maximum (kW) 270.4 276.9 283.9 291.2
Maximum (Btu/h) 922 600 944 800 968 800 993 600
Maximum number of connectable indoor
64 64 64 64
units

Standard type (AMTTTMXVAFC Anti-Corrosion Series)

Model name for combination AM080MXVAFCAAZ AM100MXVAFCAAZ AM120MXVAFCAAZ AM140MXVAFCAAZ AM160MXVAFCAAZ

Number of individual outdoor units 1 1 1 1 1
AM080MXVAFC 1
AM100MXVAFC 1
AM120MXVAFC 1
Combined outdoor unit AM140MXVAFC 1
AM160MXVAFC 1
AM180MXVAFC
AM200MXVAFC
Cooling (kW) 22.4 28.0 33.6 40.0 45.0
Nominal capacity
Cooling (Btu/h) 76 400 95 500 114 600 136 500 153 500
Minimum (kW) 11.2 14.0 16.8 20.0 22.5
Total capacity of the Minimum (Btu/h) 38 200 47 800 57 300 68 200 76 800
connected indoor units
(Cooling) Maximum (kW) 29.1 36.4 43.7 52.0 58.5
Maximum (Btu/h) 99 400 124 200 149 000 177 400 199 600
Maximum number of connectable indoor
14 18 21 26 29
units

11
Preparing for installation
Model name for combination AM180MXVAFCAAZ AM200MXVAFCAAZ AM220MXVAFC3AZ AM240MXVAFC3AZ AM260MXVAFC3AZ
Number of individual outdoor units 1 1 2 2 2
AM080MXVAFC
AM100MXVAFC 1
AM120MXVAFC 1 2 1
Combined outdoor unit AM140MXVAFC 1
AM160MXVAFC
AM180MXVAFC 1
AM200MXVAFC 1
Cooling (kW) 50.4 56.0 61.6 67.2 73.6
Nominal capacity
Cooling (Btu/h) 172 000 191 100 210 100 229 200 251 100
Minimum (kW) 25.2 28.0 30.8 33.6 36.8
Total capacity of the Minimum (Btu/h) 86 000 95 500 105 100 114 600 125 500
connected indoor units
(Cooling) Maximum (kW) 65.5 72.8 80.1 87.4 95.7
Maximum (Btu/h) 223 600 248 400 273 200 298 000 326 400
Maximum number of connectable indoor
32 36 40 43 47
units

Model name for combination AM280MXVAFC3AZ AM300MXVAFC3AZ AM320MXVAFC3AZ AM340MXVAFC3AZ AM360MXVAFC3AZ

Number of individual outdoor units 2 2 2 2 2
AM080MXVAFC
AM100MXVAFC
AM120MXVAFC 1 1 1
Combined outdoor unit AM140MXVAFC 1
AM160MXVAFC 1 1
AM180MXVAFC 1
AM200MXVAFC 1 1 1
Cooling (kW) 78.6 84.0 89.6 96.0 101.0
Nominal capacity
Cooling (Btu/h) 268 100 286 600 305 700 327 600 344 600
Minimum (kW) 39.3 42.0 44.8 48.0 50.5
Total capacity of the Minimum (Btu/h) 134 100 143 300 152 800 163 700 172 300
connected indoor units
(Cooling) Maximum (kW) 102.2 109.2 116.5 124.8 131.3
Maximum (Btu/h) 348 600 372 600 397 400 422 300 448 000
Maximum number of connectable indoor
51 54 58 61 64
units

12
 Model name for combination AM380MXVAFC3AZ AM400MXVAFC3AZ AM420MXVAFC3AZ AM440MXVAFC3AZ AM460MXVAFC3AZ
Number of individual outdoor units 2 2 3 3 3
AM080MXVAFC
AM100MXVAFC 1
AM120MXVAFC 1 2 1
Combined outdoor unit AM140MXVAFC 1

ENGLISH
AM160MXVAFC
AM180MXVAFC 1
AM200MXVAFC 1 2 1 1 1
Cooling (kW) 106.4 112.0 117.6 123.2 129.6
Nominal capacity
Cooling (Btu/h) 363 100 382 200 401 200 420 300 442 200
Minimum (kW) 53.2 56.0 58.8 61.6 64.8
Total capacity of the Minimum (Btu/h) 181 500 191 000 200 600 210 100 221 000
connected indoor units
(Cooling) Maximum (kW) 138.3 145.6 152.9 160.2 168.5
Maximum (Btu/h) 472 000 496 800 521 600 546 400 574 800
Maximum number of connectable indoor
64 64 64 64 64
units

Model name for combination AM480MXVAFC3AZ AM500MXVAFC3AZ AM520MXVAFC3AZ AM540MXVAFC3AZ AM560MXVAFC3AZ

Number of individual outdoor units 3 3 3 3 3
AM080MXVAFC
AM100MXVAFC
AM120MXVAFC 1 1 1
Combined outdoor unit AM140MXVAFC 1
AM160MXVAFC 1 1
AM180MXVAFC 1
AM200MXVAFC 1 1 2 2 2
Cooling (kW) 134.6 140.0 145.6 152.0 157.0
Nominal capacity
Cooling (Btu/h) 459 200 477 700 496 800 518 700 535 700
Minimum (kW) 67.3 70.0 72.8 76.0 78.5
Total capacity of the Minimum (Btu/h) 229 600 238 800 248 300 259 200 267 800
connected indoor units
(Cooling) Maximum (kW) 175.0 182.0 189.3 197.6 204.1
Maximum (Btu/h) 597 000 621 000 645 800 674 200 696 400
Maximum number of connectable indoor
64 64 64 64 64
units

13
Preparing for installation
Model name for combination AM580MXVAFC3AZ AM600MXVAFC3AZ AM620MXVAFC3AZ AM640MXVAFC3AZ
Number of individual outdoor units 3 3 4 4
AM080MXVAFC
AM100MXVAFC 1
AM120MXVAFC 1 2
Combined outdoor unit AM140MXVAFC
AM160MXVAFC
AM180MXVAFC 1
AM200MXVAFC 2 3 2 2
Cooling (kW) 162.4 168.0 173.6 179.2
Nominal capacity
Cooling (Btu/h) 554 200 573 300 592 300 611 400
Minimum (kW) 81.2 84.0 86.8 89.6
Total capacity of the Minimum (Btu/h) 277 000 286 500 296 200 305 600
connected indoor units
(Cooling) Maximum (kW) 211.1 218.4 225.7 233.0
Maximum (Btu/h) 720 400 745 200 770 000 794 800
Maximum number of connectable indoor
64 64 64 64
units

Model name for combination AM660MXVAFC3AZ AM680MXVAFC3AZ AM700MXVAFC3AZ AM720MXVAFC3AZ

Number of individual outdoor units 4 4 4 4
AM080MXVAFC
AM100MXVAFC
AM120MXVAFC 1 1 1 1
Combined outdoor unit AM140MXVAFC 1
AM160MXVAFC 1
AM180MXVAFC 1
AM200MXVAFC 2 2 2 3
Cooling (kW) 185.6 190.6 196.0 201.6
Nominal capacity
Cooling (Btu/h) 633 300 650 300 668 800 687 900
Minimum (kW) 92.8 95.3 98.0 100.8
Total capacity of the Minimum (Btu/h) 316 500 325 100 334 300 343 800
connected indoor units
(Cooling) Maximum (kW) 241.3 247.8 254.8 262.1
Maximum (Btu/h) 823 200 845 400 869 400 894 200
Maximum number of connectable indoor
64 64 64 64
units

14
 Model name for combination AM740MXVAFC3AZ AM760MXVAFC3AZ AM780MXVAFC3AZ AM800MXVAFC3AZ
Number of individual outdoor units 4 4 4 4
AM080MXVAFC
AM100MXVAFC
AM120MXVAFC
Combined outdoor unit AM140MXVAFC 1

ENGLISH
AM160MXVAFC 1
AM180MXVAFC 1
AM200MXVAFC 3 3 3 4
Cooling (kW) 208.0 213.0 218.4 224.0
Nominal capacity
Cooling (Btu/h) 709 800 726 800 745 300 764 400
Minimum (kW) 104.0 106.5 109.2 112.0
Total capacity of the Minimum (Btu/h) 354 700 363 300 372 500 382 000
connected indoor units
(Cooling) Maximum (kW) 270.4 276.9 283.9 291.2
Maximum (Btu/h) 922 600 944 800 968 800 993 600
Maximum number of connectable indoor
64 64 64 64
units

Compact type (AMTTTMXVAFC Series)

Model name for combination AM080MXVAFC/AZ AM100MXVAFC/AZ AM120MXVAFC/AZ AM140MXVAFC/AZ AM160MXVAFC/AZ

Number of individual outdoor units 1 1 1 1 1
AM080MXVAFC 1
AM100MXVAFC 1
AM120MXVAFC 1
AM140MXVAFC 1
AM160MXVAFC 1
Combined outdoor unit
AM180MXVAFC
AM200MXVAFC
AM220MXVAFC
AM240MXVAFC
AM260MXVAFC
Cooling (kW) 22.4 28.0 33.6 40.0 45.0
Nominal capacity
Cooling (Btu/h) 76 400 95 500 114 600 136 500 153 500
Minimum (kW) 11.2 14.0 16.8 20.0 22.5
Total capacity of the Minimum (Btu/h) 38 200 47 800 57 300 68 200 76 800
connected indoor units
(Cooling) Maximum (kW) 29.1 36.4 43.7 52.0 58.5
Maximum (Btu/h) 99 400 124 200 149 000 177 400 199 600
Maximum number of connectable indoor
14 18 21 26 29
units

15
Preparing for installation
Model name for combination AM180MXVAFC/AZ AM200MXVAFC/AZ AM220MXVAFC/AZ AM240MXVAFC/AZ AM260MXVAFC/AZ
Number of individual outdoor units 1 1 1 1 1
AM080MXVAFC
AM100MXVAFC
AM120MXVAFC
AM140MXVAFC
AM160MXVAFC
Combined outdoor unit
AM180MXVAFC 1
AM200MXVAFC 1
AM220MXVAFC 1
AM240MXVAFC 1
AM260MXVAFC 1
Cooling (kW) 50.4 56.0 61.6 67.2 72.8
Nominal capacity
Cooling (Btu/h) 172 000 191 100 210 200 229 300 248 400
Minimum (kW) 25.2 28.0 30.8 33.6 36.4
Total capacity of the Minimum (Btu/h) 86 000 95 500 105 100 114 600 124 200
connected indoor units
(Cooling) Maximum (kW) 65.5 72.8 80.1 87.4 94.6
Maximum (Btu/h) 223 600 248 400 273 200 298 100 322 900
Maximum number of connectable indoor
32 36 40 43 47
units

Model name for combination AM280MXVAFC2AZ AM300MXVAFC2AZ AM320MXVAFC2AZ AM340MXVAFC2AZ AM360MXVAFC2AZ

Number of individual outdoor units 2 2 2 2 2
AM080MXVAFC 1 1
AM100MXVAFC 1 1
AM120MXVAFC 1
AM140MXVAFC
AM160MXVAFC 1
Combined outdoor unit
AM180MXVAFC
AM200MXVAFC 1
AM220MXVAFC
AM240MXVAFC 1
AM260MXVAFC 1 1
Cooling (kW) 78.6 84.0 89.6 95.2 100.8
Nominal capacity
Cooling (Btu/h) 268 100 286 600 305 700 324 800 343 900
Minimum (kW) 39.3 42.0 44.8 47.6 50.4
Total capacity of the Minimum (Btu/h) 134 100 143 300 152 900 162 400 172 000
connected indoor units
(Cooling) Maximum (kW) 102.2 109.2 116.5 123.8 131.0
Maximum (Btu/h) 348 600 372 600 397 400 422 200 447 100
Maximum number of connectable indoor
51 54 58 61 64
units

16
 Model name for combination AM380MXVAFC2AZ AM400MXVAFC2AZ AM420MXVAFC2AZ AM440MXVAFC2AZ AM460MXVAFC2AZ
Number of individual outdoor units 2 2 2 2 2
AM080MXVAFC
AM100MXVAFC
AM120MXVAFC 1
AM140MXVAFC 1

ENGLISH
AM160MXVAFC 1
Combined outdoor unit
AM180MXVAFC 1
AM200MXVAFC 1
AM220MXVAFC
AM240MXVAFC
AM260MXVAFC 1 1 1 1 1
Cooling (kW) 106.4 112.8 117.8 123.2 128.8
Nominal capacity
Cooling (Btu/h) 363 000 384 900 401 900 420 400 439 500
Minimum (kW) 53.2 56.4 58.9 61.6 64.4
Total capacity of the Minimum (Btu/h) 181 500 192 500 201 000 210 200 219 800
connected indoor units
(Cooling) Maximum (kW) 138.3 146.6 153.1 160.2 167.4
Maximum (Btu/h) 472 000 500 400 522 500 546 500 571 400
Maximum number of connectable indoor
64 64 64 64 64
units

Model name for combination AM480MXVAFC2AZ AM500MXVAFC2AZ AM520MXVAFC2AZ AM540MXVAFC2AZ AM560MXVAFC2AZ

Number of individual outdoor units 2 2 2 3 3
AM080MXVAFC
AM100MXVAFC 1
AM120MXVAFC 1
AM140MXVAFC
AM160MXVAFC 1
Combined outdoor unit
AM180MXVAFC
AM200MXVAFC 1
AM220MXVAFC 1
AM240MXVAFC 1
AM260MXVAFC 1 1 2 1 1
Cooling (kW) 134.4 140.0 145.6 151.4 156.8
Nominal capacity
Cooling (Btu/h) 458 600 477 700 496 800 516 500 535 000
Minimum (kW) 67.2 70.0 72.8 75.7 78.4
Total capacity of the Minimum (Btu/h) 229 300 238 900 248 400 258 300 267 500
connected indoor units
(Cooling) Maximum (kW) 174.7 182.0 189.3 196.8 203.8
Maximum (Btu/h) 596 200 621 000 645 800 671 500 695 500
Maximum number of connectable indoor
64 64 64 64 64
units

17
Preparing for installation
Model name for combination AM580MXVAFC2AZ AM600MXVAFC2AZ AM620MXVAFC2AZ AM640MXVAFC2AZ
Number of individual outdoor units 3 3 3 3
AM080MXVAFC 1 1
AM100MXVAFC 1
AM120MXVAFC 1
AM140MXVAFC
AM160MXVAFC
Combined outdoor unit
AM180MXVAFC
AM200MXVAFC
AM220MXVAFC
AM240MXVAFC 1
AM260MXVAFC 1 2 2 2
Cooling (kW) 162.4 168.0 173.6 179.2
Nominal capacity
Cooling (Btu/h) 554 100 573 200 592 300 611 400
Minimum (kW) 81.2 84.0 86.8 89.6
Total capacity of the Minimum (Btu/h) 277 100 286 600 296 200 305 700
connected indoor units
(Cooling) Maximum (kW) 211.1 218.4 225.7 233.0
Maximum (Btu/h) 720 300 745 200 770 000 794 800
Maximum number of connectable indoor
64 64 64 64
units

Model name for combination AM660MXVAFC2AZ AM680MXVAFC2AZ AM700MXVAFC2AZ AM720MXVAFC2AZ

Number of individual outdoor units 3 3 3 3
AM080MXVAFC
AM100MXVAFC
AM120MXVAFC
AM140MXVAFC 1
AM160MXVAFC 1
Combined outdoor unit
AM180MXVAFC 1
AM200MXVAFC 1
AM220MXVAFC
AM240MXVAFC
AM260MXVAFC 2 2 2 2
Cooling (kW) 185.6 190.6 196.0 201.6
Nominal capacity
Cooling (Btu/h) 633 300 650 300 668 800 687 900
Minimum (kW) 92.8 95.3 98.0 100.8
Total capacity of the Minimum (Btu/h) 316 700 325 200 334 400 344 000
connected indoor units
(Cooling) Maximum (kW) 241.3 247.8 254.8 262.1
Maximum (Btu/h) 823 300 845 400 869 400 894 300
Maximum number of connectable indoor
64 64 64 64
units

18
 Model name for combination AM740MXVAFC2AZ AM760MXVAFC2AZ AM780MXVAFC2AZ AM800MXVAFC2AZ
Number of individual outdoor units 3 3 3 4
AM080MXVAFC 1
AM100MXVAFC
AM120MXVAFC
AM140MXVAFC

ENGLISH
AM160MXVAFC
Combined outdoor unit
AM180MXVAFC
AM200MXVAFC
AM220MXVAFC 1
AM240MXVAFC 1 3
AM260MXVAFC 2 2 3
Cooling (kW) 207.2 212.8 218.4 224.0
Nominal capacity
Cooling (Btu/h) 707 000 726 100 745 200 764 300
Minimum (kW) 103.6 106.4 109.2 112.0
Total capacity of the Minimum (Btu/h) 353 500 363 100 372 600 382 200
connected indoor units
(Cooling) Maximum (kW) 269.4 276.6 283.9 291.2
Maximum (Btu/h) 919 100 943 900 968 800 993 600
Maximum number of connectable indoor
64 64 64 64
units

Compact type (AMTTTMXVAJC Series)

Model name for combination AM080MXVAJC/AZ AM100MXVAJC/AZ AM120MXVAJC/AZ AM140MXVAJC/AZ AM160MXVAJC/AZ

Number of individual outdoor units 1 1 1 1 1.0
AM080MXVAJC 1
AM100MXVAJC 1
AM120MXVAJC 1
AM140MXVAJC 1
AM160MXVAJC 1
AM180MXVAJC
Combined outdoor unit
AM200MXVAJC
AM220MXVAJC
AM240MXVAJC
AM260MXVAJC
AM280MXVAJC
AM300MXVAJC
Cooling (kW) 22.4 28.0 33.6 40.0 45.0
Nominal capacity
Cooling (Btu/h) 76 400 95 500 114 600 136 500 153 500
Minimum (kW) 11.2 14.0 16.8 20.0 22.5
Total capacity of the Minimum (Btu/h) 38 200 47 800 57 300 68 200 76 800
connected indoor units
(Cooling) Maximum (kW) 29.1 36.4 43.7 52.0 58.5
Maximum (Btu/h) 99 400 124 200 149 000 177 400 199 600
Maximum number of connectable indoor
14 18 21 26 29
units

19
Preparing for installation
Model name for combination AM180MXVAJC/AZ AM200MXVAJC/AZ AM220MXVAJC/AZ AM240MXVAJC/AZ AM260MXVAJC/AZ
Number of individual outdoor units 1 1 1 1 1
AM080MXVAJC
AM100MXVAJC
AM120MXVAJC
AM140MXVAJC
AM160MXVAJC
AM180MXVAJC 1
Combined outdoor unit
AM200MXVAJC 1
AM220MXVAJC 1
AM240MXVAJC 1
AM260MXVAJC 1
AM280MXVAJC
AM300MXVAJC
Cooling (kW) 50.4 56.0 61.6 67.2 72.8
Nominal capacity
Cooling (Btu/h) 172 000 191 100 210 200 229 300 248 400
Minimum (kW) 25.2 28.0 30.8 33.6 36.4
Total capacity of the Minimum (Btu/h) 86 000 95 500 105 100 114 600 124 200
connected indoor units
(Cooling) Maximum (kW) 65.5 72.8 80.1 87.4 94.6
Maximum (Btu/h) 223 600 248 400 273 200 298 100 322 900
Maximum number of connectable indoor
32 36 40 43 47
units

Model name for combination AM280MXVAJC/AZ AM300MXVAJC/AZ AM320MXVAJC2AZ AM340MXVAJC2AZ AM360MXVAJC2AZ

Number of individual outdoor units 1 1 2 2 2
AM080MXVAJC
AM100MXVAJC 1
AM120MXVAJC 1
AM140MXVAJC 1
AM160MXVAJC
AM180MXVAJC
Combined outdoor unit
AM200MXVAJC
AM220MXVAJC 1 1 1
AM240MXVAJC
AM260MXVAJC
AM280MXVAJC 1
AM300MXVAJC 1
Cooling (kW) 78.6 84.0 89.6 95.2 101.6
Nominal capacity
Cooling (Btu/h) 268 200 286 600 305 700 324 800 346 700
Minimum (kW) 39.3 42.0 44.8 47.6 50.8
Total capacity of the Minimum (Btu/h) 134 100 143 300 152 900 162 400 173 400
connected indoor units
(Cooling) Maximum (kW) 102.2 109.2 116.5 123.8 132.1
Maximum (Btu/h) 348 700 372 600 397 400 422 200 450 700
Maximum number of connectable indoor
51 54 58 61 64
units

20
 Model name for combination AM380MXVAJC2AZ AM400MXVAJC2AZ AM420MXVAJC2AZ AM440MXVAJC2AZ AM460MXVAJC2AZ
Number of individual outdoor units 2 2 2 2 2
AM080MXVAJC
AM100MXVAJC
AM120MXVAJC
AM140MXVAJC

ENGLISH
AM160MXVAJC 1
AM180MXVAJC 1 1
Combined outdoor unit
AM200MXVAJC 1
AM220MXVAJC 1 1 1 2
AM240MXVAJC
AM260MXVAJC
AM280MXVAJC 1
AM300MXVAJC
Cooling (kW) 106.6 112.0 117.6 123.2 129.0
Nominal capacity
Cooling (Btu/h) 363 700 382 200 401 300 420 400 440 200
Minimum (kW) 53.3 56.0 58.8 61.6 64.5
Total capacity of the Minimum (Btu/h) 181 900 191 100 200 700 210 200 220 100
connected indoor units
(Cooling) Maximum (kW) 138.6 145.6 152.9 160.2 167.7
Maximum (Btu/h) 472 800 496 900 521 700 546 500 572 300
Maximum number of connectable indoor
64 64 64 64 64
units

Model name for combination AM480MXVAJC2AZ AM500MXVAJC2AZ AM520MXVAJC2AZ AM540MXVAJC2AZ AM560MXVAJC2AZ

Number of individual outdoor units 2 2 2 2 2
AM080MXVAJC
AM100MXVAJC
AM120MXVAJC
AM140MXVAJC
AM160MXVAJC
AM180MXVAJC
Combined outdoor unit
AM200MXVAJC 1
AM220MXVAJC 1 1
AM240MXVAJC 1
AM260MXVAJC 1
AM280MXVAJC 1 1
AM300MXVAJC 1 1 1
Cooling (kW) 134.6 140.2 145.6 151.2 156.8
Nominal capacity
Cooling (Btu/h) 459 300 478 400 496 800 515 900 535 000
Minimum (kW) 67.3 70.1 72.8 75.6 78.4
Total capacity of the Minimum (Btu/h) 229 700 239 200 248 400 258 000 267 500
connected indoor units
(Cooling) Maximum (kW) 175.0 182.3 189.3 196.6 203.8
Maximum (Btu/h) 597 100 621 900 645 800 670 700 695 500
Maximum number of connectable indoor
64 64 64 64 64
units

21
Preparing for installation
Model name for combination AM580MXVAJC2AZ AM600MXVAJC2AZ AM620MXVAJC2AZ AM640MXVAJC2AZ
Number of individual outdoor units 2 2 3 3
AM080MXVAJC
AM100MXVAJC
AM120MXVAJC 1 1
AM140MXVAJC
AM160MXVAJC
AM180MXVAJC
Combined outdoor unit
AM200MXVAJC
AM220MXVAJC 1 1
AM240MXVAJC
AM260MXVAJC
AM280MXVAJC 1 1
AM300MXVAJC 1 2 1
Cooling (kW) 162.6 168.0 173.8 179.2
Nominal capacity
Cooling (Btu/h) 554 800 573 200 593 000 611 400
Minimum (kW) 81.3 84.0 86.9 89.6
Total capacity of the Minimum (Btu/h) 277 400 286 600 296 500 305 700
connected indoor units
(Cooling) Maximum (kW) 211.4 218.4 225.9 233.0
Maximum (Btu/h) 721 200 745 200 770 900 794 800
Maximum number of connectable indoor
64 64 64 64
units

Model name for combination AM660MXVAJC2AZ AM680MXVAJC2AZ AM700MXVAJC2AZ AM720MXVAJC2AZ

Number of individual outdoor units 3 3 3 3
AM080MXVAJC
AM100MXVAJC
AM120MXVAJC
AM140MXVAJC 1
AM160MXVAJC
AM180MXVAJC 1 1
Combined outdoor unit
AM200MXVAJC
AM220MXVAJC 1 1 1 2
AM240MXVAJC
AM260MXVAJC
AM280MXVAJC 1 1
AM300MXVAJC 1 1
Cooling (kW) 185.6 190.6 196.0 201.8
Nominal capacity
Cooling (Btu/h) 633 300 650 400 668 800 688 600
Minimum (kW) 92.8 95.3 98.0 100.9
Total capacity of the Minimum (Btu/h) 316 700 325 200 334 400 344 300
connected indoor units
(Cooling) Maximum (kW) 241.3 247.8 254.8 262.3
Maximum (Btu/h) 823 300 845 500 869 400 895 200
Maximum number of connectable indoor
64 64 64 64
units

22
 Model name for combination AM740MXVAJC2AZ AM760MXVAJC2AZ AM780MXVAJC2AZ AM800MXVAJC2AZ
Number of individual outdoor units 3 3 3 3
AM080MXVAJC
AM100MXVAJC
AM120MXVAJC
AM140MXVAJC

ENGLISH
AM160MXVAJC
AM180MXVAJC 1 1
Combined outdoor unit
AM200MXVAJC
AM220MXVAJC 2 1
AM240MXVAJC
AM260MXVAJC
AM280MXVAJC 1 1
AM300MXVAJC 1 1 2 1
Cooling (kW) 207.2 213.0 218.4 224.2
Nominal capacity
Cooling (Btu/h) 707 000 726 800 745 200 765 000
Minimum (kW) 103.6 106.5 109.2 112.1
Total capacity of the Minimum (Btu/h) 353 500 363 400 372 600 382 500
connected indoor units
(Cooling) Maximum (kW) 269.4 276.9 283.9 291.5
Maximum (Btu/h) 919 100 944 800 968 800 994 500
Maximum number of connectable indoor
64 64 64 64
units

❋❋ You can connect maximum 64 indoor units to the outdoor unit. Maximum quantity of connectable indoor unit is set to 64
since outdoor unit only support up to 64 communication address. Indoor unit address can be assigned from 0~63. If the
indoor unit address was assigned from 64~79 E201 error will occur.

• Installation combination must be complied when composing outdoor unit combination.

CAUTION

23
Preparing for installation
Moving the outdoor unit
ffSelect the moving path in advance.
ffBe sure that moving path can support weight of the outdoor unit.
ffDo not slant the product more than 30˚ when carrying it. (Do not lay the product down in sideways.)
ffSurface of the heat exchanger is sharp. Be careful not to get injured while moving the product.

• You must use certain part of the product when moving the product.
CAUTION

When moving with a crane

ffFasten the wire rope as shown in the figure.

Wire rope
ffTo protect damage or scratches, insert a piece of cloth between the
outdoor unit and the wire rope.

Holes for wire rope to go

through

When moving with a forklift

ffCarefully insert the forklift forks into the forklift holes at the bottom of
the outdoor unit.
ffBe careful with the forklift from damaging the product.
Forklift holes

Forklift
Holes for forklift forks
to go through

When moving the product without wooden pallet and the crane is not available for use
ffConnect a wire rope to the outdoor unit as you would move it with a
Forklift
crane. Wire rope
ffHang the wire rope to the forklift fork to move the outdoor unit.

24
Selecting installation location
Decide the installation location, with the consideration of the following conditions, under user’s approval.
ffPlace where hot discharge air or noise from the outdoor unit may not disturb the neighbor (Especially in residential areas,
keep the operation hours in mind.)
ffPlace where structure can bear the weight and vibration of the outdoor unit.
ffPlace with flat surface where rainwater does not settle or leak.

ENGLISH
ffPlace where it is not exposed to strong wind.
ffWell ventilated place with sufficient service place for repairs and maintenance. (Discharge duct can be purchased separately)
ffPlace where you can connect the refrigerant pipes between indoor and outdoor units within allowable distance.
ffPlace where there is no risk of inflammable gas leakage.
ffPlace where there is no direct influence of snow or rain.
ffPlace where a large amount of water generated by external environment does not directly affect the top of the outdoor
unit.

Installation Guide at the seashore

Make sure to follow below guides when installing at the seashore.
1. Do not install the product in a place where it is directly exposed to sea water and sea breeze.
-- Make sure to install the product behind a structure (such as building) that can block see breeze.
-- Even when it is inevitable to install the product in seashore, make sure that product is not directly exposed to sea
breeze by installing a protection wall.
※ As we cannot guarantee that the corrosion resistance model(AM***MXVAFCAAZ) can prevent corrosion completely, we
recommend that you install a protection wall or install the outdoor unit behind a structure(such as building) that can
block sea breeze.
2. Consider that the salinity particles clinging to the external panels should be sufficiently washed out.
3. Because the residual water at the bottom of the outdoor unit significantly promotes corrosion, make sure that the slope
does not disturb drainage.
-- Keep the floor level so that rain does not accumulate.
-- Be careful not to block the drain hole due to foreign substance
4. When product is installed in seashore, periodically clean it with water to remove attached salinity.
5. Make sure to install the product in a place that provides smooth water drainage.
Especially, ensure that the base part has good drainage.
6. If the product is damaged during the installation or maintenance, make sure to repair it.
7. Check the condition of the product periodically.
-- Check the installation site every 3 months and perform anti-corrosion treatment such as R-Pro supplied by SAMSUNG
(Code : MOK-220SA) or commercial water repellent grease and wax, etc., based on the product condition.
-- When the product is to be shut down for a long period of time, such as off-peak hours, take appropriate measures like
covering the product.
8. If the product installed within 500m of seashore,
-- Standard model (AM✴✴✴MXVAFC/AZ) : Special anti-corrosion treatment is required.
-- Corrosion resistance model (AM✴✴✴MXVAFCAAZ) : Special anti-corrosion treatment is recommended.
※ Please contact your local SAMSUNG representative for further details.

25
Selecting installation location
Outdoor
unit

Outdoor unit
Sea breeze

Sea Outdoor
unit

Protection wall

Outdoor
Sea breeze unit Sea breeze

Outdoor unit
Sea Sea
Protection wall should be constructed with a solid material that can block the sea
breeze and the height and width of the wall should be 1.5 times larger than the size of
the outdoor unit. (You must secure more than 700mm(28inch) of space between the
protection wall and the outdoor unit for air circulation.)

• System air conditioner may cause static noise when listening to AM stations. Therefore, select an installation location
CAUTION
for indoor unit where electrical wiring can be done while keeping certain distance from a radio, computer and stereo
equipment.
-- Especially, keep the unit at least 3m(9.84inch) away from the electrical equipment in an area with weak
electromagnetic waves and put the main power cable and communication cables in a separately installed
protection tube.
-- Make sure that there is no equipment that generates electromagnetic waves. If not electromagnetic waves may
cause problem to the control systems which may lead to air conditioner malfunction. (Example: Remote control
sensor of the indoor unit may not receive the signal very well, due to ballast stabilizer of the lighting equipment.)
• In regions with heavy snowfall, make sure to install the outdoor unit where there is no concerns of direct snowfall on
the outdoor unit. Also, build higher base support so that accumulated snow does not block the air inlet or the heat
exchanger.
• R-410A refrigerant is a safe, nontoxic and nonflammable refrigerant. However, if the place holds any concerns for
exceeding dangerous level of refrigerant concentration in case of refrigerant leakage, extra ventilation system is
required.
• When you install the outdoor unit in a high places such as roof, install fence or guardrail around it. When there is no
fence or guardrail, service person could fall.
• Do not install the product in places where corrosive gases such as sulfur oxides, ammonia, and sulfurous gas are
produced. (e.g. Toilet outlet, ventilation opening, sewage works, dyeing complex, cattle shed, sulfuric hot spring,
nuclear power plant, ship etc.) When installing the product in those places, contact an installation specialty store as the
copper pipe and brazing part will need additional corrosion proof or anti-rust additive to prevent corrosion.
• Make sure to keep any inflammable materials (such as wooden materials, oil etc.) around the outdoor unit. When
there's fire, those inflammable material will easily catch the fire and may pass it on to the product.
• Depending on the condition of power supply, unstable power or voltage any cause malfunction of the parts or control
system. (At the ship or places using power supply from electric generator...etc)

26
Space requirement for installation
ffSpace requirement was decided based on following conditions; Cooling mode, outdoor temperature of 35°C (95°F).
Larger space is required if the outdoor temperature is higher than 35°C (95°F) or if the place is heated easily by quantity of
solar radiation.
ffWhen you secure installation space, consider path for people and the direction of the wind.
ffSecure installation space as shown in the below illustration, considering ventilation and the service space.

ENGLISH
ffIf the installation space is narrow, installer or other worker may get injured during work and may also cause problem to
the product.
ffIf you install multiple number of outdoor units in one space, make sure to secure enough ventilation space if there’s any walls
around the product that may disturb the air flow. If enough ventilation space is not secured, product may malfunction.
ffYou may install the outdoor units with 20mm (0.78 inch) of space between the product, but product’s performance may
decrease depending on the installation environment.

Single installation
Unit: mm (inch)
Over 100 (4)
[S2]

Over 300 (12)

Height of the wall is

Front side unlimited
Over 500 (20)

Front Over 100 (4)

side
[S1]

Over 100 (4) Over 100 (4)

<Case 1> <Case 2>

27
Space requirement for installation
Module installation
Unit: mm (inch)

Over 300 (12)

[S2]
Over 300 (12)

Height of
Over 100 (4)

Over 200 (8)

the wall is
Over 100 (4) Front side Over 100 (4) Over 400 Over 400 unlimited

Over 500
(16) Front (16)

(S1)
Over 100 (4) side

<Case 1> <Case 2>

Over 100 (4) Over 100 (4) Over 100 (4) Over 100 (4) Over 500
(20)

Front side
Over 600

Over 100 (4)

(24)

Over 100 (4)

Over 100 (4) Over 100 (4)
Over 500

Front side
(20)

<Case 3>

❋❋ For <Case 1> or <Case 3>

• Height of the wall on the front side should not be higher than 1500mm (60 inch).
• Height of the wall on the air inlet side should not be higher than 500mm (20 inch).
• Height of the wall on the side is not limited.
• If the height of the wall exceeds by certain value (h1, h2), additional clearance [(h1)/2, (h2)/2 : Half of the exceeded
distance] should be added to the service space (S1, S2).

Unit: mm (inch)
h1

Front side

Air inlet side

h2
1500 (60)

500 (20)

S1+h1/2 S2+h2/2

28
Accessories
Accessories
ffYou must keep following accessories until the installation is finished.
ffHand over the installation manual to the customer after finishing the installation.

ENGLISH
Installation manual (1)

Optional accessories
ffFollowing optional accessories are needed for connecting pipes between the indoor and outdoor units.

Specification
Classification Model Name
MBH KW
MXJ-YA1509M 51 below 15.0 and below
MXJ-YA2512M Over 52 ~ 136 and below Over 15.1 ~ 40.0 and below
MXJ-YA2812M Over 137 ~ 154 and below Over 40.1 ~ 45.0 and below
Y-Joint MXJ-YA2815M Over 155 ~ 240 and below Over 45.1 ~ 70.3 and below
MXJ-YA3419M Over 241 ~ 336 and below Over 70.4 ~ 98.4 and below
MXJ-YA4119M Over 337 ~ 461 and below Over 98.5 ~ 135.2 and below
MXJ-YA4422M Over 461 Over 135.2
MXJ-HA2512M 154 and below (for 4 rooms) 45.0 and below (for 4 rooms)

Distribution header MXJ-HA3115M Over 240 (for 8 rooms) Over 70.3 (for 8 rooms)
Over 241 ~ 461 and below Over 70.4 ~ 135.2 and below
MXJ-HA3819M
(for 8 rooms) (for 8 rooms)
Y-Joint MXJ-TA3819M 461 and below 135.2 and below
- Outdoor unit MXJ-TA4422M 478.4 and over 140.2 and over

❋❋ If you use an indoor unit with no internal EEV(Electric Expansion Valve), you will need an EEV kit.
❋❋ Only use the genuine accessories listed in above table and do not use imitated accessories.

29
Base construction and installation of the outdoor unit
• Make sure to remove the wooden pallet before installing the outdoor unit. If you do not remove the wooden
pallet, there is risk of fire during welding the pipes. If the outdoor unit is installed with wooden pallet on, and
WARNING
it was used for long period time, wooden palette may break and cause electrical hazard or high pressure may
damage the pipes.

❋❋ Fix an outdoor unit firmly on the base ground with anchor bolts.
❋❋ Manufacturer is not responsible for the damage occurred by not following the installation standards.

1. Make sure that the height of the base ground is 200mm or higher to protect the outdoor unit from rain water or other
external conditions. Also, install a draining pit around the base ground and connect the drain pipe to the drainage.
2. Considering the vibration and weight of the outdoor unit, strength of the base ground must be strong to prevent noise
and the top surface of it should be flat.
3. Base ground should be 1.5 times larger than the bottom of the outdoor unit.
4. Outdoor unit must be fixed firmly so that it can withstand the wind speed of 30m/s. If you cannot fix the outdoor unit on
the base ground, fix it by side or use extra structure.
5. To prevent water from stagnating or freezing, construct a drainage with over 1/50 slope. (Ice may form on the floor in
winter time.)
6. It is necessary to add wire mesh or steel bar during concrete construction for the base ground to prevent damages or
cracks.
7. When installing multiple outdoor units at the same place, construct a H beam or an anti-vibration frame on the base
ground to install the outdoor unit.
8. After installing a H beam or an anti-vibration frame, apply corrosion protection and other necessary coating.
9. When concrete construction for outdoor unit installation is completed, install an anti-vibration pad (t=20mm/0.78 inch or
more) or an anti-vibration frame to prevent vibration of the outdoor unit from transferring to the base ground.
10. Place the outdoor unit on a H beam or an anti-vibration frame and fix it with the bolt, nut and washer. (The bearing force
has to be over 3.5kN)

Base ground construction

Bottom surface of the base
ground must be horizontally

Over 200mm (8inch)

Over 200mm (8inch) leveled
Draining pit Over 200mm (8inch)

<When installing on the ground> <When installing on the roof>

30
 Outdoor unit installation

Over 200mm (8inch)

Over 50mm (2inch)

Base ground

ENGLISH
H beam or anti-vibration
frame
Over 200mm
(8inch)

Outdoor unit base mount and anchor bolt position

Unit: mm (inch)
A
Outdoor unit - Anti-vibration
B
frame (4-Ø 12)
761 (29.96)
(2.13) (2.13)

803 (31.61)
54 54

Anti-vibration - Base ground

(4-Ø 18)

Unit: mm (inch)
Classification Small type Large A type Large B type
AM140/160/180/200TTT, AM220MXVAFC,
Models AM080/100/120TTT
AM220MXVAJC AM240/260/280/300TTT
A 880 (34.65) 1,295 (50.98) 1,295 (50.98)
B 740 (29.13) 1,150 (45.28) 1,150 (45.28)

❋❋ Refer to the blueprints in technical data book to make a holes for connecting the anti-vibration pad.

31
Base construction and installation of the outdoor unit
Examples of draining work
ffConstruct the drainage ditch with reinforced concretes and make sure that water-proofing work is done.
ffFor smooth draining of water, make sure to apply 1/50 slope.
ffConstruct a drainage around the outdoor unit to prevent the water (from the outdoor unit) from stagnating, overflowing
or freezing near the installation space.
ffWhen the outdoor unit is installed on the roof, check the strength and waterproof status of the roof.
Unit: mm (inch)

80 (3.15)
60°
960 (37.80)
760 (29.92)

80 ( )
3.15 3.15
) 80 (
X
X’
100 (3.94)

Direction of the drainage

(Slope 1/50)
100 (3.94) B

<Drainage work for single installation>

150 (5.91) 100 (3.94)
50 (1.97)

(3.94)
100

<X-X’ SECTION>
80 (3.15)
80 (3.15)

80 (3.15)
60°
60°

80 ( 80 ( )
.15) 3.15 3.15
) 3.15 3.15
80 (3 ) 80 ( ) 80 (

Direction of the drainage

(Slope 1/50)
200 200
(7.87) B (7.87) B
<Drainage work for module installation>

Unit: mm (inch)
Classification Small type Large A type Large B type
AM140/160/180/200TTT, AM220MXVAFC,
Models AM080/100/120TTT
AM220MXVAJC AM240/260/280/300TTT
A 940 (37.01) 1,350 (53.15) 1,350 (53.15)
B 740 (29.13) 1,150 (45.28) 1,150 (45.28)

32
 Cautions regarding on connecting the anchor bolt
CAUTION ffTighten the rubber washer to prevent the bolt connection part of the outdoor unit from corroding.

Rubber washer

ffAnchor specification

ENGLISH
Diameter of Anchor length Sleeve length Fastening m
Size Insert depth
drill bit (a) (b) (b) torque
Ø 10 14mm (1/2") 75mm (3") 40mm (1-1/2") 50mm (2") 30 N·m

b
c
❋❋ Use the anchor bolts and nuts that is zinc plated or made of STS material. Regular
anchor bolts or nuts may get damaged by corrosion. a

Cautions regarding on connecting the pipe

ffIf you install the outdoor unit on the rooftop, check the strength and make sure to waterproof the rooftop.
ffConstruct draining pit around the base construction and pay attention to the drainage around the outdoor
unit. (Water may form during outdoor unit operation.)
ffIf there's any possibility of small animals from entering the pipe outlet, block the outlet as shown in the
illustration.
Block the part. (When withdrawing the pipe from
the front side)

Liquid side pipe

Gas side pipe

Cautions regarding on anti-vibration frame installation

ffDuring installation, make sure there is no gap between the base ground and the supporting structures such as
anti-vibration frame or H beam.
ffBase ground must be constructed strongly to support the bottom part of the anti-vibration mount.

ffAfter installing the anti-vibration frame, untighten the fixing part on the top and bottom part of the frame.

33
Base construction and installation of the outdoor unit
Caution for installing discharge duct
CAUTION ffStatic pressure of the discharge duct should be within the standard specification 78.45 Pa (0.315 W.G) when
installing the duct.
ffIf you remove the fan guard to install the discharge duct, make sure to install a safety net on the duct outlet.
Foreign substance may enter into the product and there could be a risk of personal injury.
ffWear protection equipment at all times when making galvanized sheet metal duct, since the worker may get
injured by the sharp parts.
ffWhen installing the outdoor unit under the tree or near forest, leafs may get into the product and cause
problems on the product. Therefore, install a discharge duct to prevent foreign substance infiltration.

<Protecting discharge duct> <Preventing foreign substance infiltration>

34
Installing the wind/snow prevention duct
Installing the outdoor unit around the obstacles
ffIt is necessary to install a wind/snow prevention duct(field supply) to direct exhaust from the fan horizontally, when it is
difficult to provide a minimum space of 2m (6.56ft) between the air outlet and a nearby obstacle.

ENGLISH
Upper floor
Discharged air

Discharged air
Grille/louver

Suction air

Ex.) Balcony Ex.) Mechanical room

Installing the outdoor unit in cold region

ffIn cold regions with lots of snowfall, install a snow prevention duct, as a sufficient countermeasure, to prevent snow from
accumulating on the outdoor unit. When the snow prevention duct is not installed, frost may accumulate on the heat
exchanger and operation may not work normally.
ffAir outlet of the duct should not be directed to the enclosed space.

Cautions regarding on installing the frame and selecting the base ground
CAUTION • Height (h) of the frame and the base ground should be higher than the "heaviest expected snowfall".
• Area of the frame and the base ground should not be larger than the are of the outdoor unit. Snow may
accumulate if the area of the frame or the base ground is larger.

35
Installing the wind/snow prevention duct
Installing the outdoor unit in windy region
ffIn windy regions such as near sea shores, protection wall or wind protection duct must be installed for normal operation
of the outdoor unit. (Refer to the illustration of the snow prevention duct, for installing the wind protection duct.)
ffInstall the wind prevention duct with the consideration of major wind direction. If the direction of the discharge part is
same as major direction of the wind, it could cause product’s performance decrease.
Cautions regarding on installing the frame and selecting the base ground
CAUTION
• The base ground must be solid and the outdoor unit must be fixed with anchor bolts.
• Make sure to install outdoor unit in a place strong enough to withstand its weight. If the place cannot withstand
the weight of the outdoor unit, outdoor unit may fall and cause personal injury.
• When installing on a rooftop subject to strong wind, countermeasures must be taken to prevent the unit from
falling down.
• Use a frame that is resistant to corrosion. Unit: mm (inch)
560 (22.05) 880 (34.05) 560 (22.05) 871 (34.29)

782 (30.79)

532 (20.94)
668 (26.30)
1210 (47.64)
1318 (51.89)

2300 (90.55)
127 (5) 593 (23.35)

108 (4.25) 612 (24.09)

2271 (89.41)
1632 (64.25)
1150 (45.28)

1134 (44.65)
965 (37.99)
980 (38.58)

2000 (78.74)

180 (7.09)
180 (7.09)

765 (30.12) 550 (21.65)

<AM080/100/120TTT>
560 (22.05) 1295 (50.98) 560 (22.05) 871 (34.29)
668 (26.30)

1197 (47.13)
532 (20.94)
1210 (47.64)
1318 (51.89)

2300 (90.55)
127 (5)593 (23.35)

108 (4.25) 612 (24.09)

2271 (89.41)
1632 (64.25)
180 (7.09) 1150 (45.28)

180 (7.09) 1134 (44.65)

980 (38.58)

965 (37.99)

2415 (95.08)

765 (30.12)550 (21.65)

<AM140/160/180/200TTT, AM220MXVAJC>
560 1295 560 871

1192
532
668
1252
1315

2400

2371
640
552

1732

1255
1080
1255

1080
550

180

180

406
2415 550 765 550

<AM220MXVAFC, AM240/260/280/300TTT>

36
Refrigerant pipe installation
• When installing, make sure there is no leakage. When collecting the refrigerant, stop the compressor first before
WARNING
removing the connection pipe. If the refrigerant pipe is not properly connected and the compressor works
with the service valve open, the pipe inhales the air and it makes the pressure inside of the refrigerant cycle
abnormally high which may lead to explosion and injury.

ENGLISH
Refrigerant pipe work
ffThe length of refrigerant pipe should be as short as possible and the height difference between an indoor and outdoor
unit should be minimized.
ffPiping work must be done within allowable piping length, height difference, and the allowable length after branching.
ffThe pressure of the R-410A is high. Use only certified refrigerant pipe and follow the installation method.
ffAfter installing the pipes, calculate the total length of the pipe to check if additional refrigerant is needed. When you need
to charge the additional refrigerant, make sure to use R-410A refrigerant.
ffUse clean refrigerant pipe and there shouldn’t be any harmful ion, oxide, dust, iron content or moisture inside pipe.
ffUse tools and accessories that fit on R-410A only.

Tool Installation process/purpose Compatibility with conventional tool

Pipe cutter Pipe cutting
Compatible
Flaring tool Pipe flaring
Refrigerant Apply refrigerant
Refrigerant pipe Exclusive ether oil, ester oil, alkali benzene oil or synthetic oil
machine oil oil on flared part
installation
Connect flare nut
Torque wrench
with pipe
Pipe bender Pipe bending
Compatible
Prevent oxidation
Nitrogen gas
Air tightness test within the pipe
Welder Pipe welding
Vacuuming, Need exclusive one to prevent mixture of R-22 refrigerant oil use and
Manifold gage Air tightness
charging also the measurement is not available due to high pressure
test ~ additional
refrigerant
Refrigerant refrigerant Need exclusive one since there is risk of refrigerant leakage or inflow
and checking
charging hose charging of impurities
operation
Compatible (Use products which contain the check valve to prevent
Vacuum pump Pipe drying the oil from flowing backward into the outdoor unit.) Use the one
that can be vacuumed up to -100.7kpa(5Torr).
Scale for
refrigerant Charging refrigerant Compatible
charging
Need exclusive one
Gas leak detector Gas leak test
(Ones used for R-134a is compatible)
Must use the flare nut equipped with the product. Refrigerant leakage may occur when the conventional flare
Flare nut
nut for R-22 is used.

37
Refrigerant pipe installation
Selecting refrigerant pipe
First branch joint

Increase the main

pipe size

ffInstall the refrigerant pipe according to main pipe size of each outdoor unit capacity.
ffWhen the pipe length (including elbow) between an outdoor unit and the farthest indoor unit exceeds 90m (295.28ft),
you must increase the size of the pipe (main pipe) by one grade which connects between the outdoor unit to the first
branch joint.

C/O
33.6 kW 40.0 kW 61.6 kW Ex.) 135.2 kW (461.3 MBH)
(114.6 MBH) (136.5 MBH) (210.2 MBH)
Pipe size [mm (inch)]
Capacity (kW) No.
Liquid pipe Gas pipe

(D) 33.6 kW
(1) Ø 12.70 (1/2) Ø 28.58 (1 1/8)
(114.6 MBH)
73.6 kW
(2) Ø 19.05 (3/4) Ø 34.92 (1 3/8)
(1) (2) (3) (251.1 MBH)
135.2 kW
(C) (E) (3) Ø 19.05 (3/4) Ø 41.28 (1 5/8)
(461.3 MBH)
(A)
(B)

38
Size of the pipe connected to the outdoor unit (A)
Select the size of the pipe according to the below table.

Main pipe length within 90 m (295 ft) Size Up (Main pipe length over 90 m (295 ft))
Outdoor unit capacity
[kW (MBH)] Liquid pipe Gas pipe Liquid pipe Gas pipe
[mm (inch)] [mm (inch)] [mm (inch)] [mm (inch)]

ENGLISH
22.4 kW (76.4 MBH) Ø 19.05 (3/4) Ø 22.22 (7/8)
Ø 9.52 (3/8) Ø 12.70 (1/2)
28.0 kW (95.5 MBH) Ø 22.22 (7/8) Ø 25.40 (1) note1)
33.6 kW (114.6 MBH)
Ø 28.58 (1 1/8)
40.0 kW (136.5 MBH) Ø 12.70 (1/2) Ø 15.88 (5/8)
45.0 kW (153.5 MBH)
Ø 28.58 (1 1/8)
50.4 kW (172.0 MBH)
Ø 31.75 (1 1/4) note2)
56.0 kW (191.1 MBH)
Ø 15.88 (5/8) Ø 19.05 (3/4)
61.6 kW (210.2 MBH)
67.2 kW (229.3 MBH)
73.4 kW ~ 84.0 kW
(251.1 MBH ~ 286.6 MBH) Ø 34.92 (1 3/8) Ø 38.10 (1 1/2) note3)
89.6 kW ~ 95.2 kW
(305.7 MBH ~ 324.8 MBH)
101.6 kW (346.7 MBH) Ø 19.05 (3/4) Ø 22.22 (7/8)
106.6 kW ~ 135.2 kW Ø 41.28 (1 5/8)
(363.7 MBH ~ 461.3 MBH) Ø 41.28 (1 5/8)
140.2 kW ~ 168.2 kW
(478.4 MBH ~ 573.9 MBH)
Ø 53.98 (2 1/8)
173.6 kW ~ 224.8 kW
Ø 22.22 (7/8) Ø 53.98 (2 1/8) Ø 25.40 (1) note1)
(592.3 MBH ~ 767.0 MBH)
Note1) If Ø 25.40mm (Ø 1”) pipe is not available on site, use Ø 28.58mm (Ø 1 1/8”) pipe.
Note2) If Ø 31.75mm (Ø 1 1/4”) pipe is not available on site, use Ø 34.92mm (Ø 1 3/8”) pipe.
Note3) If Ø 38.10mm (Ø 1 1/2”) pipe is not available on site, use Ø 41.28 (Ø 1 5/8”) pipe.

39
Refrigerant pipe installation
Size of the pipe between branch joints (B)
Select the pipe size according to the sum of indoor unit capacity which will be connected after the branch.
❋❋ However, if the size of the pipe between branch joints (B) is bigger than the size of the pipe connected to the outdoor
unit (A), apply the pipe size (A).

Branch pipe length within 45 m Branch pipe length between 45~90 m

(147.64 ft) note1) (147.64~295.28 ft) note1)
Indoor unit capacity [kW (MBH)]
Liquid pipe Gas pipe Liquid pipe Gas pipe
[mm (inch)] [mm (inch)] [mm (inch)] [mm (inch)]
15.0 kW (51.2 MBH) and below Ø 15.88 (5/8) Ø 19.05 (3/4)
Over 15.1 kW~22.4 kW
Ø 9.52 (3/8) Ø 19.05 (3/4) Ø 12.70 (1/2) Ø 22.22 (7/8)
(51.3 ~ 76.4 MBH) and below
Over 22.5 kW~28.1 kW
Ø 22.22 (7/8) Ø 25.40 (1) note2)
(76.5 ~ 95.9 MBH) and below
Over 28.2 kW~40.0 kW
Ø 28.58 (1 1/8)
(96.0 ~ 136.5 MBH) and below
Ø 12.70 (1/2) Ø 15.88 (5/8)
Over 40.1 kW~45.0 kW
Ø 28.58 (1 1/8)
(136.6 ~ 153.5 MBH) and below
Ø 31.75 (1 1/4) note3)
Over 45.1 kW~63.3 kW
(153.6 ~ 216.0 MBH) and below
Ø 15.88 (5/8) Ø 19.05 (3/4)
Over 63.4 kW~70.3 kW
(216.1 ~ 239.9 MBH) and below
Ø 34.92 (1 3/8) Ø 38.10 (1 1/2) note4)
Over 70.4 kW~98.4 kW
(240.0 ~ 335.8 MBH) and below
Over 98.5 kW~135.2 kW
Ø 19.05 (3/4) Ø 22.22 (7/8) Ø 41.28 (1 5/8)
(335.9 ~ 461.3 MBH) and below
Ø 41.28 (1 5/8)
Over 135.3 kW~169.0 kW
(461.4 ~ 576.7 MBH) and below Ø 53.98 (2 1/8)
Over 169.0 kW (576.7 MBH) Ø 22.22 (7/8) Ø 53.98 (2 1/8) Ø 25.40 (1) note2)
Note1) N
 ote on measuring distance between branch joints (B) : You must measure the distance between first branch joint
to the last indoor unit. (NOT from first joint to the last branch joint
Note2) If Ø 25.40 mm (Ø 1”) pipe is not available on site, use Ø 28.58 mm (Ø 1 1/8”) pipe.
Note3) If Ø 31.75 mm (Ø 1 1/4”) pipe is not available on site, use Ø 34.92 mm (Ø 1 3/8”) pipe.
Note4) If Ø 38.10 mm (Ø 1 1/2”) pipe is not available on site, use Ø 41.28 mm (Ø 1 5/8”) pipe.

40
 33.6 kW 40.0 kW 61.6 kW
(114.6 MBH) (136.5 MBH) (210.2 MBH)

(D)

ENGLISH
(1) (2) (3)
(C) (E)
(A)
(B)

Size of the pipe between the branch joint and the indoor unit
Make a selection according to outdoor unit capacity.

Pipe size (O.D. [mm (inch)])

Indoor unit capacity [kW (MBH)]
Liquid pipe Gas pipe
6.0 kW (20.5 MBH) and below Ø 6.35 (1/4) Ø 12.70 (1/2)
7.1 kW ~ 16.0 kW (24.2 MBH ~ 54.6 MBH)
Ø 9.52 (3/8) Ø 15.88 (5/8)
and below
20.0 kW ~ 23.0 kW (68.2 MBH ~
Ø 9.52 (3/8) Ø 19.05 (3/4)
78.5 MBH) and below
Over 23.0 kW (78.5 MBH) Ø 9.52 (3/8) Ø 22.22 (7/8)

Branch joint
ffBranch joint between outdoor units (C)

Classification Model name Specification [kW (MBH)]

MXJ-TA3419M 135.2 kW (461.3 MBH) and below
Y-joint for outdoor unit (C)
MXJ-TA4122M Over 140.2 kW (478.4 MBH)
ffFirst branch joint (D)
Make a selection according to outdoor unit capacity.

Classification Outdoor unit capacity [kW (MBH)] Model name of the branch joint
15.0 kW ~ 40.0 kW (51.2 ~ 136.5 MBH) and below MXJ-YA2512M
40.1 kW ~ 45.0 kW (136.6 ~ 153.5 MBH) and below MXJ-YA2812M
45.1 kW ~ 70.3 kW (153.6 ~ 239.9 MBH) and below MXJ-YA2815M
Y-joint (D)
70.4 kW ~ 98.4 kW (240.0 ~ 335.8 MBH) and below MXJ-YA3419M
98.5 kW ~ 135.2 kW (335.9 ~ 461.3 MBH) and below MXJ-YA4119M
Over 135.2 kW (461.3 MBH) MXJ-YA4422M

41
Refrigerant pipe installation
ffBranch joint (E)
Select a branch joint according to the sum of indoor unit capacity which will be connected after the branch.
❋❋ However, if the size of the pipe between branch joints (E) is bigger than the size of the pipe connected to the outdoor unit
(D), apply the pipe size (D).
1) Y-joint

Classification Model name Specification [kW (MBH)]

MXJ-YA1509M 15.0 kW (51.2 MBH) and below
MXJ-YA2512M Over 15.1 kW ~ 40.0 kW (51.3 ~ 135.2 MBH) and below
MXJ-YA2812M Over 40.1 kW ~ 45.0 kW (135.3 ~ 153.5 MBH) and below
Y-joint (E) MXJ-YA2815M Over 45.1 kW ~ 70.3 kW (153.6 ~ 239.9 MBH) and below
MXJ-YA3419M Over 70.4 kW ~ 98.4 kW (240.0 ~ 335.8 MBH) and below
MXJ-YA4119M Over 98.5 kW ~ 135.2 kW (335.9 ~ 461.3 MBH) and below
MXJ-YA4422M Over 135.2 kW (461.3 MBH)
2) Distribution header

Classification Model name Specification [kW (MBH)]

MXJ-HA2512M 45.0 kW (153.5 MBH) and below (for 4 rooms)

Distribution header (E) MXJ-HA3115M 70.3 kW (239.9 MBH) and below (for 8 rooms)
Over 70.4 kW ~ 135.2 kW (240.0 ~ 461.3 MBH) and below
MXJ-HA3819M
(for 8 rooms)

42
Basic type - additional refrigerant

C/O

56.0 kW (191.1 MBH)

ENGLISH
Ø12.70 (5 m) (Ø1/2" (16.4 ft))

14.0 kW (47.8 MBH)

Ø12.70 (5 m) (Ø1/2" (16.4 ft))

Ø6.35 (5 m) (Ø1/4"
(16.4 ft))
7.1 kW (24.1 MBH)
Ø12.70 (5 m) (Ø1/2" (16.4 ft))

Ø6.35 (10 m) (Ø1/4"

(32.8 ft))
7.1 kW (24.1 MBH) Ø9.52 (10 m) (Ø3/8" (32.8 ft))

Ø6.35 (15 m)
(Ø1/4" (49.2 ft))
Ø9.52 (10 m)
(Ø3/8" (32.8 ft))
Ø9.52 (10 m)
(Ø3/8" (32.8 ft))
Ø9.52 (10 m)
(Ø3/8" (32.8 ft))
Ø9.52 (10 m)
(Ø3/8" (32.8 ft))
7.1 kW Ø6.35 (5 m) (Ø1/4" (16.4 ft))
(24.1 MBH) 7.1 kW
(24.1 MBH)

3.6 kW (12.3 MBH)

7.1 kW (24.1 MBH)

7.1 kW (24.1 MBH)

43
Refrigerant pipe installation
Branch joint
ffBasic amount of refrigerant within the outdoor unit
-- Amount of additional refrigerant has to be calculated based on the sum of all liquid pipe length.
Classification AM080✴✴✴ AM100✴✴✴ AM120MXVAJC AM120MXVAFC AM140✴✴✴ AM160✴✴✴ AM180✴✴✴
Basic type [kg (lb)] 5.5 (12.1) 5.5 (12.1) 5.5 (12.1) 6.5 (14.3) 7.7 (17.0) 7.7 (17.0) 8.4 (18.5)
Classification AM200✴✴✴ AM220MXVAJC AM220MXVAFC AM240✴✴✴ AM260✴✴✴ AM280✴✴✴ AM300✴✴✴
Basic type [kg (lb)] 8.4 (18.5) 8.4 (18.5) 12.5(27.5) 12.5(27.5) 12.5(27.5) 12.5(27.5) 12.5(27.5)

ffAmount of additional refrigerant depending on the pipe size (ⓐ)

-- Amount of additional refrigerant has to be calculated based on the sum of all liquid pipe length.

Size of liquid pipe Ø6.35 Ø9.52 Ø12.70 Ø15.88 Ø19.05 Ø22.23 Ø25.40
[mm (inch)] (Ø1/4) (Ø3/8) (Ø1/2) (Ø5/8) (Ø3/4) (Ø7/8) (Ø1)
Additional amount 0.02 0.06 0.125 0.18 0.27 0.35 0.53
[kg/m (Ib/ft)] (0.013) (0.040) (0.084) (0.121) (0.181) (0.235) (0.356)

-- For the indoor unit already connected to EEV kit, the additional refrigerant charging is 0.0067lb per feet regardless of
the pipe size.
ffAmount of additional refrigerant for each indoor unit (ⓑ)
(Unit : kg(lb))

Capacity (MBH) 500 1000

5 6 7 9 12 15 18 19 20 24 27 28 30 32 36 38 42 48 54 60 72 76 96 110 170
Model CMH CMH
1way cassette 0.25 0.25 0.25 0.32 0.32
(AM✴✴✴F(N)N1DCH/✴✴) (0.55) (0.55) (0.55) (0.71) (0.71)
2way cassette 0.31 0.47
(AM✴✴✴✴N2DCH/✴✴) (0.68) (1.04)
4way cassette S (600x600) 0.29 0.29 0.29 0.29 0.37 0.37
(AM✴✴✴✴NNDCH/✴✴) (0.64) (0.64) (0.64) (0.64) (0.82) (0.82)
4way cassette S 0.45 0.45 0.45 0.45 0.69 0.69 0.69
(AM✴✴✴F(N)N4DCH/✴✴) (0.99) (0.99) (0.99) (0.99) (1.52) (1.52) (1.52)
4way cassette S 0.45 1.00 1.00
(AM✴✴✴JN4D(P)CH/✴✴) (0.99) (2.20) (2.20)
360 cassette 0.45 0.45 0.45 0.45 0.69 0.69 0.69
(AM✴✴✴KN4DCH/✴✴) (0.99) (0.99) (0.99) (0.99) (1.52) (1.52) (1.52)
Duct S 0.45 0.45 0.45 0.45 0.45
(AM✴✴✴MNMDCH/✴✴) (0.99) (0.99) (0.99) (0.99) (0.99)
Duct S 0.22 0.22 0.22 0.31 0.38 0.38 0.38
(AM✴✴✴KNHPKH/✴✴) (0.49) (0.49) (0.49) (0.68) (0.84) (0.84) (0.84)
Duct S 0.68 0.68 0.68 0.84 0.84
(AM✴✴✴MNHDCH/✴✴) (1.50) (1.50) (1.50) (1.85) (1.85)
Slim duct 0.35 0.35 0.35 0.45 0.45 0.42 0.42 0.62
(AM✴✴✴FNLDCH/✴✴) (0.77) (0.77) (0.77) (0.99) (0.99) (0.93) (0.93) (1.37)
Slim duct (with drain pump) 0.35 0.35 0.35 0.45 0.45 0.42 0.42 0.62
(AM✴✴✴KNLDCH/**) (0.77) (0.77) (0.77) (0.99) (0.99) (0.93) (0.93) (1.37)
MSP duct
(AM✴✴✴F(J/K) 0.37 0.37 0.37 0.37 0.54 0.47 0.47 0.47 0.68 0.68 0.91
NMDCH✴✴✴) (0.82) (0.82) (0.82) (0.82) (1.19) (1.04) (1.04) (1.04) (1.50) (1.50) (2.01)
(AM✴✴✴JNHDCH✴✴✴)
MSP duct 0.37 0.68 0.68 0.68 0.68
(AM✴✴✴✴NMPCH✴✴✴) (0.82) (1.50) (1.50) (1.50) (1.50)
HSP duct 0.68 0.68 1.18 1.18
(AM✴✴✴FNHDCH/✴✴) (1.50) (1.50) (2.60) (2.60)
Big duct 1.15 1.15
(AM✴✴✴JNHFKH/✴✴) (2.54) (2.54)
OAP duct 0.68 1.18 1.18
(AM✴✴✴✴NE*CH/✴✴) (1.50) (2.60) (2.60)

44
 Capacity (MBH) 500 1000
5 6 7 9 12 15 18 19 20 24 27 28 30 32 36 38 42 48 54 60 72 76 96 110 170
Model CMH CMH
Concealed Floor Standing 0.12 0.22 0.22 0.32 0.32
(AM✴✴✴✴NF(G)DCH/✴✴) (0.26) (0.49) (0.49) (0.71) (0.71)
Floor Standing 0.69 1.85
(AM✴✴✴✴NPD*H/✴✴) (1.52) (4.08)
Ceiling 0.39 0.39 0.56 0.56 0.95
(AM✴✴✴✴NCD*H/✴✴) (0.86) (0.86) (1.23) (1.23) (2.09)

ENGLISH
V-AHU 0.33 0.50 0.50 0.83 0.88 1.18 1.27 1.69 1.69
(AM✴✴✴✴NZDCH/✴✴) (0.73) (1.10) (1.10) (1.83) (1.94) (2.60) (2.80) (3.73) (3.73)
Wall mounted 0.24 0.24 0.24 0.36 0.36 0.36
(AM✴✴✴FNTDCH/✴✴) (0.53) (0.53) (0.53) (0.79) (0.79) (0.79)
Wall mounted (with EEV) 0.34 0.34 0.34 0.51 0.51 0.51
(AM✴✴✴F(H)NQDCH/✴✴) (0.75) (0.75) (0.75) (1.12) (1.12) (1.12)
Wall mounted 0.16 0.16 0.19 0.25 0.25 0.52 0.52 0.52
(AM✴✴✴✴NADKH/✴✴) (0.35) (0.35) (0.42) (0.55) (0.55) (1.15) (1.15) (1.15)
Wall mounted (with EEV) 0.22 0.22 0.25 0.34 0.34 0.71 0.71 0.71 0.71
(AM✴✴✴✴NVD*H/✴✴) (0.49) (0.49) (0.55) (0.75) (0.75) (1.57) (1.57) (1.57) (1.57)
Wall mounted 0.24 0.32 0.32 0.49 0.49 0.49
(AM✴✴✴KNTDCH/✴✴) (0.53) (0.71) (0.71) (1.08) (1.08) (1.08)
Wall mounted (with EEV) 0.24 0.32 0.32 0.49 0.49 0.49
(AM✴✴✴KNQDCH/✴✴) (0.53) (0.71) (0.71) (1.08) (1.08) (1.08)
Wall mounted (with EEV) 0.68
(AM✴✴✴MNQDCH/✴✴) (1.50)
ERV plus 0.11 0.36
(AM✴✴✴✴NKDEH/✴✴) (0.24) (0.79)
Hydro Unit HE 0.60 0.70 1.20
(AM✴✴✴✴NBDEH/✴✴) (1.32) (1.54) (2.65)
MCU (MCU-S✴✴NE✴✴N) 0.50 (1.10)

ffIf AHU Kit is included among the indoor units, add 0.018kg(0.04lb) of refrigerant for every 1MBH of AHU capacity
increase.
ffMethod to calculate total amount of additional refrigerant
-- Amount of additional refrigerant depending on the pipe length (ⓐ)
-- Amount of additional refrigerant for each indoor unit (ⓑ) = ∑(Amount of additional refrigerant for each connected
indoor unit) ❇ Refer to the table
-- Total amount of additional refrigerant = ⓐ+ⓑ
❋❋ Sum of total amount of additional refrigerant and the basic amount of refrigerant should not exceed 100kg (220lb). If the
refrigerant exceeds 100kg (220lb), separate the module so that weight of the refrigerant doesn't exceed 100kg (220lb).
Ex.) For AM180✴✴✴, basic amount of refrigerant is 8.7kg (19.1lb), therefore total amount of additional refrigerant
(ⓐ+ⓑ) should not exceed 91.3kg (200.9lb).
ffExample of refrigerant calculation for C/O models
Unit amount of Amount of Total amount
Size of liquid pipe Length [m (ft)] refrigerant [kg/m additional of additional
Classification (lb/ft)] refrigerant [kg (lb)] refrigerant [kg (lb)]
[mm (inch)]
① ② ①×② ∑(①×②)
Ø6.35 (Ø1/4) 35 (114.8) 0.02 (0.013) 0.7 (1.49)
Liquid pipe (ⓐ) Ø9.52 (Ø3/8) 50 (164.0) 0.06 (0.040) 3.0 (6.56) 5.575 (12.19)
Ø12.70 (Ø1/2) 15 (49.2) 0.125 (0.084) 1.875 (4.13)

45
Refrigerant pipe installation
Unit amount of Amount of Total amount
Model name of Number of units refrigerant [kg/EA additional of additional
Classification (lb/EA)] refrigerant [kg (lb)] refrigerant [kg (lb)]
indoor unit
① ② ①×② ∑(①×②)
4way cassette
4 0.45 (0.99) 1.8 (3.96)
(AM018FN4DCH)
Slim duct
2 0.45 (0.99) 0.90 (1.98)
(AM024FNLDCH)
Indoor unit (ⓑ) ⓑ 3.30 (7.26)
Slim duct
1 0.35 (0.77) 0.35 (0.77)
(AM012FNLDCH)
1way cassette
1 0.25 (0.55) 0.25 (0.55)
(AM012FN1DCH)

-- Total amount of refrigerant (ⓐ+ⓑ) = 5.575 + 3.30 = 8.875 (kg)

= 12.19 + 7.26 = 19.45 (lb)

Temper grade and minimum thickness of the refrigerant pipe

Outer diameter Minimum thickness
Temper grade
mm inch mm inch
6.35 1/4 0.70 0.028
9.52 3/8 0.70 0.028
Annealed
12.70 1/2 0.80 0.031
15.88 5/8 1.00 0.039
19.05 3/4 0.90 0.035
22.22 7/8 0.90 0.035
25.40 1 1.00 0.039
28.58 1 1/8 1.10 0.043
31.75 1 1/4 1.10 0.043
34.92 1 3/8 1.21 0.048 Drawn
38.10 1 1/2 1.35 0.053
41.28 1 5/8 1.43 0.056
44.45 1 3/4 1.60 0.063
50.80 2 2.00 0.079
53.98 2 1/8 2.10 0.083

• For pipes larger than Ø 3/4" (Ø 19.05mm), drawn type (C1220T-1/2H or C1220T-H) type copper pipe must be
CAUTION
used. If a annealed type (C1220T-O) copper pipe is used, pipe may break due to its low pressure resistance and
cause personal injury.

46
 Keeping refrigerant pipe
To prevent foreign materials or water from entering the pipe, storing method and sealing method (especially during
installation)is very important. Apply correct sealing method depending on the environment.
Exposure place Exposure time Sealing type
Longer than one month Pipe pinch
Outdoor

ENGLISH
Shorter than one month Taping
Indoor - Taping

Refrigerant pipe welding and safety information

Important information for refrigerant pipe work
CAUTION • Make sure there is no moisture inside the pipe.
• Make sure there are no foreign substances and impurities in the pipe.
• Make sure there is no leakage.
• Make sure to follow the instruction when welding or storing the pipe.

Nitrogen flushing welding

ffWhen welding the refrigerant pipes, flush them with nitrogen gas as shown in the picture.
ffIf you do not perform nitrogen flushing when welding the pipes, oxide may form inside the pipe. It can cause the
damage of the important parts such as compressor and valves etc.
ffAdjust the flow rate of the nitrogen flushing with a pressure regulator to maintain 0.05m2/h(0.54ft2/h) or less.

Ø 6.35 (1/4") copper pipe

Welding part

Nitrogen gas
Stop valve
Pressure regulator Taping
Flowmeter
High pressure hose
Nitrogen gas

Direction of the pipe when welding

ffDirection of the pipe should be headed downward or in a sideways when welding.
ffAvoid welding the pipe with pipe direction heading upward.

• When you test gas leakage after welding the pipes, use a designated solution for gas leakage detection. If you
CAUTION use the detection solution that includes sulfuric ingredient, it may cause corrosion to the pipes.

47
Refrigerant pipe installation
Cutting or flaring the pipes

1. Make sure that you prepared the required tools.

ffPipe cutter, Deburring tool, flaring tool and pipe holder, etc.

2. If you want to shorten the pipe, cut it with a pipe cutter ensuring that the cut edge remains at 90° with the side of the
pipe.
ffRefer to below illustrations for correct and incorrect examples of cut edges.

90° Oblique Rough Burr

3. To prevent a gas leak, remove all burrs at the cut edge of the pipe using a Deburring tool.

4. Carry out flaring work using flaring tool as shown below.

[Flaring tools]
A
Yoke

Flaring bar
Flaring bar
Pipe
Clutch type Wing nut type Pipe Flare nut

Depth of flaring part [A, mm (inch)]

Pipe diameter
Using flaring tool for Using conventional flaring tool
[D, mm (inch)]
R-410A Clutch type Wing nut type
ø6.35(ø1/4) 0~0.5(0~0.02) 1.0~1.5(0.04~0.06) 1.5~2.0(0.06~0.08)
ø9.52(ø3/8) 0~0.5(0~0.02) 1.0~1.5(0.04~0.06) 1.5~2.0(0.06~0.08)
ø12.70(ø1/2) 0~0.5(0~0.02) 1.0~1.5(0.04~0.06) 1.5~2.0(0.06~0.08)
ø15.88(ø5/8) 0~0.5(0~0.02) 1.0~1.5(0.04~0.06) 1.5~2.0(0.06~0.08)

48
5. Check that you flared the pipe correctly.
ffRefer to below illustrations for correct and incorrect examples of flared pipe.

Correct Inclined Damaged Surface Cracked Uneven Thickness

ENGLISH
• If foreign matters or burrs are not removed after cutting pipe, refrigerant gas may leak.
CAUTION • If foreign matters enter inside the pipe, important interior parts of the unit may get damaged or product
efficiency will be reduced. So, the direction of pipe should be downward during pipe cutting or flaring.

Connecting the flared pipes

ffCheck if the flaring is properly done according to the standard size.
ffAlign the center of the piping and tighten the flare nut with your hands. Then, tighten the flare nut with torque wrench in
a direction of the arrow indicated in below illustration.
ffMake sure to use ester oil to coat the flare connection section.
Pipe
Monkey wrench

Torque wrench
Flare connection section Flare nut

Outer diameter (D) Torque Flare dimension (L)

Flare shape [mm(inch)]
mm inch N·m lbf·ft mm inch
6.35 1/4 14 ~ 18 10.3 ~ 13.3 8.7 ~ 9.1 0.34 ~ 0.36 R 0.4~0.8
(0.016~0.032)
45° ±2°

9.52 3/8 34 ~ 42 25.1 ~ 31.0 12.8 ~ 13.2 0.50 ~ 0.52

90° ±2°

12.7 1/2 49 ~ 61 36.1 ~ 45.0 16.2 ~ 16.6 0.64 ~ 0.65

D
L
15.88 5/8 68 ~ 82 50.2 ~ 60.5 19.3 ~ 19.7 0.76 ~ 0.78

• Blowing Nitrogen gas should be done when welding the pipe.

CAUTION • Make sure to use the provided flare nut.
• Make sure that there are no cracks or twisted part when you need to bend the pipe.
• Do not fasten the flare nut with excessive strength.
• R-410A is a high pressure refrigerant and there is a risk of refrigerant leakage if the flare connection is not coated
with ester oil. Therefore, apply ester oil to coat the flare connection area.

49
Refrigerant pipe installation
Pipe installation for an outdoor unit
1. Direction of the pipe
Refrigerant pipe can be withdrawn from the front, left and right side. Take
necessary method to install the pipes according to the condition of the
installation site.

Front side connection

Left side connection Right side connection

Caution for using knock-out hole

CAUTION

Knock-out hole

• Make sure to prevent any damages on the exterior of the outdoor unit.
• Remove all burrs around the knock-out hole and apply varnish on the cross section and edges of the knock-out
hole to prevent rust.
• Use a cable protection tube and bushing to prevent a cable from being damaged when passing through a
knock-out hole.

50
2. Connecting refrigerant pipe for outdoor unit

Classification Front side connection Right/left (and bottom) side connection

• First, remove the piping cover from the outdoor • Separate the knock-out hole at the bottom side
unit. of the unit and install the pipe.
• Separate the knock-out hole that you are going • After installing and insulating the pipe, close up
to use. If you separate the knock-out hole that the remaining holes. If not, small animals such

ENGLISH
Working process is going to be unused, small animals such as as rats and squirrels may get inside the unit.
squirrels and rats may get into the unit through
the hole.
• Fix the bottom side of the piping cover first and
then fix the top part of it.

C/O
Gas side
Gas side Liquid side pipe Liquid side
pipe pipe pipe

Caution for welding the pipe to an outdoor unit

CAUTION
• When welding the pipe, the unit may get damaged by the heat and flame from welding. Use a flame proofing
cloth to protect the unit from a welding fire or flame. Sensor for detecting outside temperature is located on the
left side of the welding part so be extra careful not to damage the sensor when welding.
• The O-ring and Teflon packing inside service valve may get damaged by the heat from welding. Wrap the
bottom side of the service valve with a wet cloth and weld it as shown in the illustration. Also, water dripping
from the wet cloth may interrupt the welding. Make sure the water does not drip from the wet cloth.
• Make sure that connected pipes does not interrupt each other or make contact with the product. (Vibration may
cause damage to the pipes.)
• When removing the sealed pipe on the bottom side of the service valve, cut it with a pipe cutter first and then
start the welding. When the sealed pipe is welded without cutting, you may get injured by the refrigerant within
the pipe.

Service port Service valve

Temperature
sensor

Wet towel

< C/O >

51
Refrigerant pipe installation
3. Pipe installation between the outdoor units
ffYou will need branch joints, which is an optional accessory, for connecting in between outdoor units in order to combine
outdoor units in module.
❋❋ For optimal distribution of the refrigerant, you must use Y-joint as branch joint for connecting outdoor units. (Do
not use T-joint)
ffWhen you install the outdoor units in module, there is no restriction of installation order among outdoor units.
ffHeight of the connection pipe should be same or lower than the ones connected to the outdoor units.
ffCheck the changes in comparison with the DVM II and III.

Caution Correct installation Incorrect installation

Refrigerant pipes should

be connected at the same
or lower level than the
ones connected to the
outdoor unit.

Refrigerant pipes must be

connected by the side of
the product. Straight section
should be 300mm
(12inch) or more

Branch joint between

outdoor units must be
installed horizontally.

200 (8)~
300mm
(12inch)

Install a vertical trap in 1m (3.28ft) less

following cases as shown Over 2m (6.56ft)
in the figure : 200 (8)~
Case1. Pipe length 300mm Over 2m (6.56ft)
between outdoor unit (12inch)
branches exceeds
2m (6.56ft). 1m (3.28ft) less
Case2. Pipe length Over 2m (6.56ft)
between outdoor unit
and its branch exceeds
2m (6.56ft).
Over 2m (6.56ft)

52
 Examples of refrigerant pipe installation
C/O
1. Using Y-joint

ENGLISH
2. Using distribution header

53
Refrigerant pipe installation
Allowable length of the refrigerant pipe and the installation examples
C/O

Classification Single Installation Module installation

Outdoor unit Outdoor unit
Branch joint Branch joint
Installing only with
Y-joint

Indoor unit Indoor unit

Outdoor unit Branch joint Outdoor unit
Distribution header
Distribution header
Installing with Branch joint
Y-joint and
distribution header

Indoor unit Indoor unit

Outdoor unit Outdoor unit
Distribution header
Distribution header
Installing only with
distribution header

Indoor unit Indoor unit

Classification Example Remarks

Installing only with a+b+c+d+e+f+g+p ≤
Y-joint 200m(220m)/656'(722') Equivalent
200m (656') a+b+h ≤ length Y-joint:
Actual length Installing with
and below 200m(220m)/656'(722'), 0.5m (1.64'),
(Equivalent Y-joint and
[220m (722') a+i+k ≤ Distribution
length) distribution header
and below] 200m(220m)/656'(722') header: 1m
Installing only with a+i ≤ (3.28')
Outdoor unit ~ distribution header 200m(220m)/656'(722')
Indoor unit
Maximum Installing only with a+b+c+d+e+f+g+h+i+j+k+l+m+n+p
allowable Y-joint ≤ 1000m
length of pipe Installing with
Total length 1000m (3281') a+b+c+d+e+f+g+h+i+j+k
Y-joint and
of pipe (m) or less ≤ 1000m (3281')
distribution header
Installing only with a+b+c+d+e+f+g+h+i ≤
distribution header 1000m (3281')
Outdoor unit 10m (33') or
Pipe length r ≤ 10m (33'), s ≤ 10m (33'), t ≤ 10m (33')
~ Outdoor less
unit (Module Equivalent 13m (43') or
installation) r ≤ 13m (43'), s ≤ 13m (43'), t ≤ 13m (43')
length less
Maximum Outdoor unit ~
110/110m (361'/361') Note 2) H1 ≤ 110/110m(361’/361’)
allowable Indoor unit
height
difference of Indoor unit ~
50m(164’) or less H2 ≤ 50m(164’)
pipe Indoor unit

54
 Classification Example Remarks
45m (148')
Maximum b+c+d+e+f+g+p ≤ 45m (148'), i ≤ 45m (148')
First branch joint or less
allowable
~ Farthest Indoor Pipe length 45m~90m
length after
unit (148'~295') Required conditions must be satisfied
branch joint Note 1)

ENGLISH
❋❋ When AM✴✴✴✴NQD✴ is installed, H2 is 15 m or less.
EEV kit Model name Remarks
2m(6.6') or MEV-E24SA
1 indoor
less MEV-E32SA
MXD-E24K132A
MXD-E24K200A 2 indoor
EEV Kit ~ Actual pipe Apply to products without
MXD-E32K200A
Indoor unit length 20m(66') or EEV(Wall mounted & ceiling)
MXD-E24K232A
less
MXD-E24K300A
3 indoor
MXD-E32K224A
MXD-E32K300A

❋❋ Please refer to the EEV Kit manual.

Note 1) Required condition

Classification Condition Example

45m (148') ≤ b+c+d+e+f+g+p ≤ 90m (295'): branch
First branch joint ~
pipes (b, c, d, e, f, g) size must be increased by 1
Farthest Indoor unit
grade
If the size of pipe (main pipe), between the first
branch joint and the outdoor unit, is not increased by
1 grade, a+(b+c+d+e+f+g)x2+h+i+j+k+l+m+n+p
Total length of ≤ 1000m (3281')
extended pipe If the size of pipe (main pipe), between the first
branch joint and the outdoor unit, is increased by 1
grade, a+(b+c+d+e+f+g)x2+h+i+j+k+l+m+n+p ≤
1000m (3281')
Each Y-joint ~ Each
h, i, j, … p ≤ 45m (148')
indoor unit
Difference between the distance of the outdoor unit to the farthest indoor
unit and nearest indoor unit ≤ 45m (148'), (a+b+c+d+e+f+g+p)-(a+h) ≤
45m (148')

Note 2) When indoor unit is located at higher level than outdoor unit, allowable height difference is 110m(361’), (If the height
difference is over 40m(131’), contact your local dealer for more information.) but when the indoor unit is located at
lower level than outdoor unit, allowable height difference is 110m (361’) (If the height difference is over 50m(164’),
need to decide whether to install PDM kit or not.)
Model name of the PDM kit : MXD-A38K2A, MXD-A12K2A, MXD-A58K2A

55
Refrigerant pipe installation
Installing the branch joints
Branch joints must be installed ‘horizontally’ or ‘vertically’.

Horizontal installation

Vertical installation

• For A~J type branch joints : Connect the branch joint to the connection pipe with the provided reducer.
NOTE • For K~Z type branch joints : Cut the connection part of the branch joint or the provided socket, according to the
diameter of the connection pipe, before connecting them.

10mm~15mm (0.39~0.59 inch)

• Install the branch joint within ±15° of the horizon or vertical line.
CAUTION • Make sure that the pipe is not bent at where it is connected to the branch joint.
• Keep a minimum straight line distance of 500mm (20 inch) or more before connecting branch joint.

Connect to other branch joint or indoor unit

After branching

Pipe connection
Socket
Socket
Pipe After branching

Gas side/Liquid side branch joint

Connect to Before branching
indoor unit

Minimum straight
Pipe (Main pipe)
line [Over 500mm (20
inch)]
❋❋ Install within ±15° of the horizon or vertical line.

56
 Installing the distribution header

1. Select the reducer that fits the diameter of the pipe.

Provided item Socket
Socket Pipe *
Pipe* Pipe*

ENGLISH
Pipe*

To indoor unit
To indoor unit To outdoor unit
To outdoor unit Socket Socket

<Liquid side> <Gas side>

❋❋ Pipe : Separately purchased item

2. If the number of connected indoor unit is fewer than ports on the distribution header, block the unused ports with caps.
Welding part

Connect in Provided item Connect in

order order

Case of blocking the unused

distribution header ports
Case of blocking the unused
distribution header ports
<Liquid side> <Gas side>

• For A~J type distribution header :

NOTE Connect the distribution header to the connection pipe with the provided reducer.
• For K~Z type distribution headers :
Cut the provided socket, according to the diameter of the connection pipe, before connecting it.

10mm~15mm (0.39~0.59 inch)

• Connect the indoor units in order, while respecting the direction of the arrow shown in the illustration.
CAUTION • When indoor units are connected to same distribution head, indoor unit must be connected in order of their
capacity, from largest to smallest.

57
Refrigerant pipe installation
3. Install the distribution header horizontally.
ffInstall the distribution header horizontally so that its ports does not face down.
Socket Distribution header

Horizon line
Below ±10°

Pipe (Separately purchased item)

Horizon line

Horizon line
Below ±15°

< Liquid side >

Horizon line
Below ±15°

Horizon line
Below ±10°

< Gas side >

Installing the branch joint between outdoor units

Installation of outdoor joints

Do not install the outdoor

joint in this direction.
Gas pipe Liquid pipe

58
 To other outdoor unit ❋❋ Use the attached reducer according to the selected pipe size.

Pipe
Reducer To other outdoor joint or outdoor unit

ENGLISH
Reducer
Pipe

To other outdoor joint or Y-joint of the main pipe

<Liquid side>

To other outdoor unit ❋❋ Use the attached reducer according to the selected pipe size.

Pipe

To other outdoor joint or outdoor unit

Reducer
Reducer

Pipe

To other outdoor joint or Y-joint of the main pipe

<Gas side>

• Connect the Outdoor joint to the pipe by cutting the outlet of the Outdoor joint or provided reducer properly.
NOTE

10mm~15mm
(0.39~0.59 inch) or more

59
Electrical wiring work
Specification of the circuit breaker and power cable
Standard single (Cooling Only)
Model MCA MFA
AM080MXVAFC 26.0 40
AM100MXVAFC 32.2 50
AM120MXVAFC 35.0 50
AM140MXVAFC 45.4 63
AM160MXVAFC 51.2 63
AM180MXVAFC 56.2 63
AM200MXVAFC 65.0 75
AM220MXVAFC 70.0 80
AM240MXVAFC 70.0 80
AM260MXVAFC 73.0 80

Model MCA MFA

AM080MXAJC 15.8 25
AM100MXAJC 19.8 25
AM120MXAJC 21.8 32
AM140MXAJC 24.0 32
AM160MXAJC 27.8 40
AM180MXAJC 34.0 50
AM200MXAJC 36.6 50
AM220MXAJC 38.8 50
AM240MXAJC 44.6 50
AM260MXAJC 52.2 63
AM280MXAJC 56.6 63
AM300MXAJC 56.6 63

60
❋❋ When installing outdoor units in module, select the power supply cable according to the sum of outdoor unit capacity.
(Refer to the table for each model.)
❋❋ Power Supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible
cord. (Code designation IEC: 60245 IEC 66 / CENELEC: H07RN-F)

Caution for electrical work

CAUTION • You must install ELCB or MCCB + ELB

ENGLISH
-- ELCB: Earth leakage breaker
-- MCCB: Molded case circuit breaker
-- ELB: Earth leakage breaker
• Do not operate the outdoor unit before completing the refrigerant pipe work.
• Do not disconnect or change the cable inside the product. It may cause damage to the product.
• Specification of the power cable is selected based on following installation condition; culvert installation/
ambient temperature 30ºC(86ºF) / single multi conductor cables. If the condition is different from the ones stated,
please consult an electrical installation expert and re-select the power cable.
-- If the length of power cable exceed 50m (164.04ft), re-select the power cable considering the voltage drop.
• Use a power cable made out of incombustible material for the insulator (inner cover) and the sheath (outer
cover).
• Do not use the power cable with the core wire exposed due to insulator damage occurred during removal of the
sheath. When the core wire is exposed, it may cause fire.

Exposed wire Insulator (inner cover)

core
Sheath (outer cover)

<The example of exposed core wire>

61
Electrical wiring work
Power and communication cable configuration
ffMain power and the ground cable must be withdrawn through the knock-out hole on the bottom-right or right side of
the cabinet.
ffWithdraw the communication cable from the designated knock-out hole on the bottom-right side of the front part.
ffInstall the power and communication cable using separate cable protection tube.
ffFix a protection tube to the knock-out hole on the outdoor unit by using a CD connector or bushing. Make sure to use
insulating bushing.
Main unit Sub unit Sub unit
ELCB ELCB ELCB
or or or
MCCB+ MCCB+ MCCB+
ELB ELB ELB

Protection
tube

Communication Ground cable Ground cable Ground cable

Communication Communication
cable
cable between cable between
Power • ground outdoor units outdoor units
cable Power cable Power cable Power cable

Specification of the protection tube

Name Temper grade Applicable conditions

When the protection tube is installed indoor and not exposed

Flexible PVC conduit PVC
to outside, because it is embedded in concrete structure

When the protection tube is installed indoor but exposed to

Class 1 flexible conduit Galvanized steel sheet
outside so there are risk of damage to the protection tube

When the protection tube is installed outdoor and exposed to

Class 1 PVC coated flexible Galvanized steel sheet and
outside so there are risk of damage to the protection tube and
conduit Soft PVC compound
extra waterproof is needed

Caution for perforating the knock-out hole

CAUTION • Perforate a knock-out hole by punching it with a
hammer.
• After perforating the knock-out hole, apply rust
resisting paint around the hole. Path for arranging
• When you need to pass the cables through the knock- external
out hole, remove burrs on the hole and protection the communication cable
cable with a protection tape or bushing etc.
Caution for installing communication cable
• When you connect the cable, it may sag and pressed by Fixing location
other parts. Therefore cables should be fixed to a clamp of the external
highlighted with a box on the illustration. communication cable

62
 Power wiring diagram

3 phase 3wires 208-230V

ENGLISH
MCCB+ MCCB+ MCCB+
ELB ELB ELB
or or or
ELCB ELCB ELCB

Main unit Sub unit 1 Sub unit 2

Main unit Sub unit

Single phase 2 Communication

wires 208-230V cable (Outdoor unit ~
Outdoor unit)
MCCB +
ELB Communication
or cable (Outdoor unit ~
ELCB Indoor unit)

Communication Communication
Grounding Grounding Grounding cable (Outdoor unit ~ cable (Outdoor unit ~
Wired remote Wired Wired Indoor unit) Outdoor unit)
controller remote remote
controller controller

ffConnect a power cable of the outdoor unit after checking that R-S-T (3 phase 3 wire) is properly connected.
ffMalfunction may occur if one or more of the wires among R-S-T phases (3 Phases-3 Wires) are not connected properly.
(*Malfunction: Turning on/off, occurrence of error, consecutive reset)
ffCommunication cable between indoor and outdoor units and communication cable between outdoor units has no
polarity.
ffArrange the cables with a cable tie.
❋❋ ELCB and ELB must be installed since there is risk of electric shock or fire when they are not installed.

63
Electrical wiring work
Selecting solderless ring terminal
ffSelect a solderless ring terminal for a power cable according to the nominal dimensions for cable.
ffApply insulation coating to the connection part of the solderless ring terminal and the power cable.
Silver solder

Nominal dimensions for

4/6 (0.006/0.009) 10 (0.01) 16 (0.02) 25 (0.03) 35 (0.05) 50 (0.07) 70 (0.10)
cable [mm2 (inch2)]
Nominal dimensions for
4 (3/8) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16) 8 (3/16)
screw [mm (inch)]
Standard
16.5 16
dimension 9.5 (3/8) 15 (9/16) 15 (9/16) 16 (10/16) 12 (1/2) 22 (7/8) 22 (7/8) 24 (1)
(10/16) (10/16)
B [mm (inch)]
Allowance ±0.2 ±0.2 ±0.3 ±0.4
±0.2 (±0.007) ±0.3 (±0.011) ±0.3 (±0.011)
[mm (inch)] (±0.007) (±0.007) (±0.011) (±0.015)
Standard
dimension 5.6 (1/4) 7.1 (1/4) 9 (3/8) 11.5 (7/16) 13.3 (1/2) 13.5 (1/2) 17.5 (1/2)
[mm (inch)]
D +0.3 +0.3 +0.5 +0.5
Allowance +0.3 (+0.011) (+0.011) (+0.011) +0.5 (+0.019) +0.5 (+0.019) (+0.019) (+0.019)
[mm (inch)] -0.2 (-0.007) -0.2 -0.2 -0.2 (-0.007) -0.2 (-0.007) -0.2 -0.4
(-0.007) (-0.007) (-0.007) (-0.015)
Standard
11.4
dimension 3.4 (1/8) 4.5 (3/16) 5.8 (1/4) 7.7 (5/16) 9.4 (3/8) 13.3 (1/2)
(7/16)
d1 [mm (inch)]
Allowance ±0.2 ±0.2 ±0.2 ±0.2 ±0.2 ±0.3 ±0.4
[mm (inch)] (±0.007) (±0.007) (±0.007) (±0.007) (±0.007) (±0.011) (±0.015)
6 7.9 9.5 11 12.5 17.5 18.5
E Min. [mm (inch)]
(1/4) (5/16) (5/16) (3/8) (1/2) (11/16) (3/4)
5 9 9 13 15 13 13 13 14 20
F Min. [mm (inch)]
(3/16) (3/8) (3/8) (1/2) (5/8) (1/2) (1/2) (1/2) (9/16) (3/4)
43
20 28.5 30 33 34 38 50 51
L Max. [mm (inch)] (1-
(3/4) (1-1/8) (1-3/16) (1-5/16) (1-3/8) (1-1/2) (2) (2)
11/16)
Standard
4.3 8.4 8.4 8.4 8.4 8.4 8.4 8.4 8.4 8.4
dimension
(3/16) (1-3/16) (1-3/16) (1-3/16) (1-3/16) (1-3/16) (1-3/16) (1-3/16) (1-3/16) (1-3/16)
[mm (inch)]
d2
+ 0.2 + 0.4 + 0.4 + 0.4 + 0.4 + 0.4
Allowance + 0.4 (+0.015) + 0.4 (+0.015)
(+0.007) (+0.015) (+0.015) (+0.015) (+0.015) (+0.015)
[mm (inch)] 0 (0) 0 (0)
0 (0) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0)
0.9 1.15 1.45 1.7 1.8 1.8 2.0
t Min. [mm (inch)]
(0.03) (0.04) (0.05) (0.06) (0.07) (0.07) (0.078)

64
 Connecting the power terminal
ffConnect the cables to the terminal board with solderless ring terminals.
ffProperly connect the cables by using certified and rated cables and make sure to fix them properly so that external force
is not applied to the terminal.
ffUse a driver and wrench that can apply the rated torque when tightening the screws on the terminal board.
ffTighten the terminal screws by complying rated torque value. If the terminal is loose, fire can occur due to arc heat

ENGLISH
generation and if the terminal is too tight, terminal board could get damaged.

Solderless ring Cable tie

terminal
Thin cable
Thick cable

When connecting two cables to one terminal,

separate the solderless terminal up and down to
prevent it from getting loose. Place the thin cable
upward and the thick cable downward. Fix the power
cable with a cable tie.

The place where the sheath of the power

supply cable is removed.

Connector

Power cable protection tube

• When removing the outer sheath of the power supply cable, be careful not to scratch the inner sheath of the
CAUTION cable.
• Make sure that more than 20 mm (0.79 inch) of the outer sheath of the indoor unit power and communication
cable are inside the electrical component box.
• Install the communication cable separately from power cable and other communication cables.
Tightening torque for terminal
Screw Remarks
N·m lbf·ft
M4 1.2~1.8 0.9~1.3 Single phase 208~230V power cable
M8 5.5~7.3 4.1~5.4 3 phase 208~230V power cable

65
Electrical wiring work
Examples of how to use the cable striper

<Cable striper>

1. Adjust the blade position by coin. (Controller is at the bottom side of the tool.) Fix the blade
position according to the outer sheath thickness of the power cable.

2. Fix the power cable and tool by using the hook at the top side of the tool.

3. Cut out the outer sheath of the power cable by revolving the tool in the direction of the arrow,
two or three times.

4. At this situation, cut out the outer sheath of the power cable by moving the tool toward the
direction of the arrow.

5. Slightly bend the wire and pull out the cut part of the outer sheath.

66
 Fixing the power cable

3 phase 3wires 208-230V

ENGLISH
ELCB
or
MCCB+
ELB Sub unit communication cable

• Do not let the power cable come into contact with the pipes inside the outdoor unit. If the power supply cable
CAUTION
touches the pipes, the vibration of the compressor is transferred to the pipes and can damage the power supply
cables or pipes, creating the danger of fire or explosion.
• Make sure that the place where the sheath of power supply cable is removed is inside the power supply box. If it
is impossible, you should connect the protection tube for power cable to the power supply box.
• After arranging the power cable into the power supply box, tighten the cover.

Connect the ring terminal of 3 phase cable

1. Cut the power cable to an appropriate length and connect it with the
solderless terminal.
2. After connecting the power cable to the terminal as seen in the illustration, fix
it with cable tie.
3. Fix the housing, which has an insulator, to the terminal board.

67
Electrical wiring work
Fixing the ground cable
ffConnect the ground cable to the grounding hole inside the power supply box.

Grounding

Withdrawing the power cable

ffWithdrawing from the front side
-- Connect the power cable protection tube into the power supply box as
shown picture.
-- Be sure that the power supply cable is not damaged by burr on the knock-
out hole.

68
 Installing the Solution device
ffWhen the number of indoor units installed with the outdoor unit is 16 or less

F1 Terminal block with indoor

F1
F2 unit

ENGLISH
F2
OF1 Terminal block with

OF1
OF2 outdoor unit sub module

OF2
R1 Terminal block with

R1
R2 solution device

R2

69
Electrical wiring work
Grounding work
Grounding must be done by a qualified installer for your safety.

Grounding the power cable

ffThe standard of grounding may vary according to the rated voltage and installation place of the air conditioner.
ffGround the power cable according to the following table.
Power condition
Voltage to ground is lower than 150V Voltage to ground is over 150V
Installation place
Must perform the grounding work 3. Note 1)
High humidity
(Including the case where earth leakage breaker is installed)
Average humidity Perform grounding work 3. Note 1) Must perform the grounding work 3. Note 1)
Perform grounding work 3, if possible, for (Including the case where earth leakage
Low humidity breaker is installed)
your safety. Note 2)

Note 1) About grounding work 3.

• Grounding work must be done by an expert (with qualification).
• Check if the grounding resistance is lower than 100Ω. When installing a earth leakage breaker (that can cut the electric
circuit within 0.5 second in case of a short circuit), allowable grounding resistance should be 30~500Ω.
Note 2) Grounding at dry place
• The grounding resistance should be lower than 100Ω. Even in worst case, grounding resistance should be lower than
250Ω.

Performing the grounding work

ffUse a rated grounding cable by referring to the specification of the electric cable for the outdoor unit.

❋❋ When using the exclusive grounding terminal (When ❋❋ When using grounding of the switch board
the grounding terminal is already built on the house)

Exclusive grounding terminal Distributing board

70
Air tightness test and vacuum drying
Air tightness test
ffUse tools for R-410A to prevent the inflow of foreign substances and resist against the internal pressure.
ffDo not remove the core of filling port.

ENGLISH
ffUse Nitrogen gas for air tightness test as shown in the illustration.

C/O
Manifold gage

Low pressure side High pressure

side

Filling port Service valve

Nitrogen gas

Gas pipe Liquid pipe

Apply pressure to the liquid side pipe and gas side pipe If you apply pressure at more than 4.1MPa(594.6psi), pipes may
(when installing outdoor units in module) with Nitrogen get damaged. Apply pressure with pressure regulator and pay
gas at 4.1MPa(594.6psi). attention to the pressure of the nitrogen.

After applying Nitrogen gas, check there's any change of

Keep it for minimum 24 hours to check if pressure drops.
pressure, using a pressure regulator.

If the pressure is changed, apply soap water to check for leakage

If the pressure drops, check for gas leakage.
and check the pressure of the nitrogen gas again.

Maintain 1.0MPa(145psi) of the pressure before

After checking the first gas leakage, maintain 1.0MPa(145psi) to
performing vacuum drying and check for further gas
check for further gas leakage.
leakage.

• Perform a Nitrogen gas leak test with the service valve of the outdoor unit closed.
CAUTION • When charging the nitrogen gas, charge it from the both (high•low pressure) sides.
• If the pipe is filled in a short time with a highly excessive pressure of Nitrogen gas, the pipes may get damaged.
Make sure to use a regulator to prevent the high pressure Nitrogen gas, over 4.1MPa(594.6psi), from entering
into the pipe.

71
Air tightness test and vacuum drying
Vacuum drying pipes and indoor units
ffUse tools for R-410A to prevent the inflow of foreign substances and resist against the internal pressure.
ffUse vacuum pump that allows vacuuming under -100.7kPa (5 Torr).
ffUse the vacuum pump with the check valve to prevent pump oil from flowing backward while the vacuum pump is
stopped.
ffCompletely close the liquid·gas side service valve of the outdoor unit.

Connect the manifold gauge to the liquid side pipe

When installing outdoor units in module, connect the manifold gauge to
and gas side pipe (when installing outdoor units in
liquid side pipe and the gas side pipe.
module).

Perform vacuum drying of the liquid side pipe and

Make sure that check valve is installed to prevent pump oil from flowing
gas side pipe (when installing outdoor units in
into the pipe.
module) using a vacuum pump.

While the vacuum gauge pressure is less than

-100.7 kPa (5 Torr), perform the vacuum drying for Vacuum pressure must be checked with the vacuum gauge.
more than 1 hour and close the valve.

After vacuum pump stops, check whether the

pressure is maintained within -100.7 kPa (5 Torr) for Check for gas leakage
an hour.

Yes Vacuum destruction

Over -100.7 kPa (5 Torr) • Apply nitrogen gas to the pipe at pressure of
0.05 Mpa(7.25psi).

No

Charge additional refrigerant to the pipe Perform vacuum drying again

No Yes
Pressure increase

❋❋ If the pressure rises in an hour, either water is remaining inside the pipe or there is a leakage.
❋❋ When the ambient temperature of vacuuming pipe is low (less than 0°C (32°F)), moisture might remain within the pipe.
Therefore, pay special attention to the pipe sealing in the winter.

72
Pipe insulation
Insulating the refrigerant pipes and branch joints
ffCheck for gas leakage before completing (the hose and pipe insulation) and if there is no sign of leakage, make sure to
insulate the pipes and hoses.
ffUse EPDM material insulator that meets the following conditions.

ENGLISH
Test item Unit Standard
Density g/cm3 0.048~0.096
Dimensional change rate by heat % Below -5
Absorption rate g/cm3 Below 0.005
Thermal conduction rate W/m·K Below 0.037
Moisture transpiration factor ng/(m2·s·Pa) Below 15
Moisture transpiration grade g/(m2·24h) Below 15
Formaldehyde dispersion mg/L There should be none
Oxygen rate % Over 25

Selecting the refrigerant pipe insulator

ffInsulate the gas pipe and liquid pipe by referring to the thickness of insulator for each pipe size.
ffThe standard condition is; temperature at 30°C, humidity less than 85%. If case if the humidity is higher, you must
increase the size by one grade as stated in below table.

Insulator (Cooling)
General High humidity
Outer diameter
Pipe [ 30ºC (86ºF), 85% ] [ 30ºC (86ºF), over 85% ] Remarks
EPDM, NBR
mm inch mm inch mm inch
6.35~9.52 1/4~3/8 9 3/8 9 3/8
Liquid pipe
12.7~50.8 1/2~2 13 1/2 13 1/2
6.35 1/4 13 1/2 19 3/4 Heating resisting
temperature over
9.52~25.4 3/8~1 19 3/4 25 1 120°C(248°F)
Gas pipe
28.58~44.45 1 1/8~1 3/4 19 3/4 32 1 1/4
50.8 2 25 1 38 1 1/2

❋❋ When installing insulation in places and conditions below, use the same insulation that is used for high humidity
conditions.
<Geological condition>
-- High humidity places such as shoreline, hot spring, near lake or river, and ridge (when the part of the building is
covered by earth and sand.)
<Operation purpose condition>
-- Restaurant ceiling, sauna, swimming pool etc.
<Building construction condition>
-- The ceiling frequently exposed to moisture and cooling is not covered. (e.g. The pipe installed at a corridor of a
dormitory and studio or near an exit that opens and closes frequently.”)
-- The place where the pipe is installed is highly humid due to the lack of ventilation system.

73
Pipe insulation
Insulate the refrigerant pipe
ffMake sure to insulate the refrigerant pipe, branch joint, distribution header, and the connection part of the pipes.
ffIf you insulate the pipes, condensed water will not fall from the pipes.
ffCheck if there are any cracks on the insulation at the bent part of the pipe.

Insulator
Insulator Clamp
Indoor unit
Insulator

Gas side pipe

Install the insulation to be

Liquid side pipe overlapped
Fix securely without any gap.

Insulating pipes Insulating pipes connected behind the EEV kit

• The insulation of the gas and liquid pipes can be in contact • When installing the gas side and liquid side pipes, leave at
with each other but they should not press excessively against least 10mm (3/8") of space.
each other. • When the gas side and liquid side pipes are contacting each
• When the gas side and liquid side pipes are contacting each other, increase the thickness of the insulation by one grade.
other, increase the thickness of the insulation by one grade.

10mm (3/8") 10mm (3/8") 10mm (3/8")

Insulator
Insulator

Liquid pipe
Gas pipe
Gas pipe Liquid pipe

• Install the insulation without any gaps or cracks and

CAUTION use adhesive on the connection part of it to prevent
Additional Insulator Hanger
moisture from entering.
• Bind the refrigerant pipe with insulation tape if it
is exposed to outside sunlight. (When binding the
pipe with finishing tape, be careful not to reduce the
thickness of the insulation.)
a Insulator for refrigerant
• Install the refrigerant pipe respecting that the pipe
ax3
insulation does not get thinner on the bent part or
hanger of pipe.
• When the thickness of insulation is reduced, reinforce
the reduced thickness with additional insulation.

74
 Insulate the distribution header
ffFix the distribution header with a cable tie and cover the connected part. Insulation
ffInsulate the distribution header and the welded part and wrap the connected part with an
adhesive insulation tape to prevent dew formation.

ENGLISH
Adhesive insulation tape Insulate after welding a stopper

Insulate the Insulate the refrigerant

distribution pipe Adhesive insulation tape
header
ffFix the distribution header with a hanger after insulating it.

Insulating the branch joint

ffTightly attach the insulator, provided with the branch joint, to the separately purchased insulator. Wrap the connected
part with an insulator (separately purchased item) that has thickness of at least 10mm (0.39 inch).
ffUse an insulator that resist heat up to 120°C. Wrap the branch joint with an insulation that has thickness of at least 10mm
(0.39 inch).
Pipe insulator Insulation tape (Separately purchased item)
(Separately Provided
purchased item) Insulator
Fix securely without any gap. Pipe
Fix securely without
any gap.

Pipe insulator Pipe insulator (Separately purchased item)

150mm (Separately
Branch purchased item) ❋❋ Attach the adhesive insulation tape to the
(5.90 inch)
joint pipe, as shown in the picture, after insulating
Thickness of the insulator (Separately purchased item) should be the pipe.
thicker than 10mm (0.39 inch).

75
Pipe insulation
Insulating the pipe located inside of the outdoor unit
ffWith a pipe insulator, insulate the pipe up to whole service valve located inside of the outdoor unit.
ffSeal the gap between the outdoor unit pipe and the insulator. Rainwater and dewdrops may soak through the gap
between the pipe and the insulation of the outdoor unit installed on the outside.
ffSeparate the cover of the pipe and close it after insulation work. Only remove a knock-out hole cover where the pipe will
be installed. If the knock-out hole is open unnecessarily, it must be closed. If not, small animals such as squirrels and rats
may get into the unit through the hole and the unit may be damaged.

C/O

76
Charging additional refrigerant
ffR-410A refrigerant is blended refrigerant. Add refrigerant in liquid form only. (Make sure to use the refrigerant bomb in
upright position)
ffMeasure the quantity of the refrigerant according to the length of the liquid side pipe. Add fixed quantity of the
refrigerant using a scale.

ENGLISH
Single installation
ffOpen the manifold gauge valve connected to the liquid side service valve and add the liquid refrigerant.
ffIf you cannot add the whole quantity of the refrigerant while the outdoor unit is stopped, open the gas side and liquid
side service valve. Then, add remaining refrigerant by pressing the refrigerant adding button of the outdoor PCB.
Outdoor unit

Gas side Liquid side

R-410A (Inject
liquid refrigerant)

Manifold gage
Scale Service valve

Vacuum port

Module installation
ffOpen the manifold gauge valve connected to the liquid side service valve and add the liquid refrigerant.
ffIf you cannot add the whole quantity of the refrigerant while the outdoor unit is stopped, open the gas side and liquid
side service valve. Then, add remaining refrigerant by pressing the refrigerant adding button of the outdoor PCB.
ffIf you use the refrigerant charging function from the PCB, outdoor unit will operate and charge the refrigerant. At this
time, you must use gas side manifold gauge for cooling operation.
Manifold gage Outdoor unit Outdoor unit

Liquid side
Gas
side

R-410A (Inject
liquid refrigerant)

Liquid side pipe

Scale Service valve

Vacuum port

77
Charging additional refrigerant
• Open the gas side and liquid side service valve completely after charging the refrigerant. (If you operate the air
CAUTION conditioner with the service valve closed, the important parts may be damaged.)
• Put on safety equipment when charging refrigerant.
• Do not charge the refrigerant when you adjust or control other product such as indoor units or EEV kits.
• If you charge the refrigerant with the front cabinet open, be very careful with the fan on the top of the product
to prevent personal injury.
• When the ambient temperature is low in winter time, do not heat the refrigerant container to speed up the
charging process. There is risk of explosion.
• Close the valve of the refrigerant container immediately after charging the refrigerant. If not, there might be a
change in entire amount of refrigerant.

Using service valve for gas

ffAfter charging the refrigerant, close all caps as shown in the illustration.
Cap for the control part
ffTightening torque for the cap of refrigerant charging port 10~12N·m
(7.4 ~ 8.9 lbf·ft)
ffTightening torque for the cap of control part 20~25N·m (14.8 ~ 18.4
lbf·ft)
ffOpening/closing torque for the valve
-- Over Ø19.05mm (Ø3/4inch) : 10 N·m (7.4 lbf·ft) Cap for the refrigerant
charging port

78
Basic segment display
Step Display content Display
SEG 1 SEG 2 SEG 3 SEG 4
At initial power input Checking segment display
“8” “8” “8” “8”
SEG 1 SEG 2 SEG 3 SEG 4

ENGLISH
While setting communication Number of communicated
between indoor and outdoor unit Number of connected indoor units units
(Addressing) “A” “d” ❋❋ Refer to "View Mode"
for communication
address
SEG 1 SEG 2 SEG 3 SEG 4
After communication setting
Transmit/Reception address Reception address (in
(usual occasion) I/U: “A” I/U: “0”
decimal number)

❋❋ I/U : Indoor unit

79
Setting outdoor unit option switch and key function
Setting outdoor unit option switches: A TYPE

Switch Setting Function Remarks

Setting can be done from the main outdoor unit
SW51 / Setting total number of installed indoor unit only (sub unit: setting is unnecessary)
SW52 SW51: Tens digit, SW52: Units digit Ex) When 12 indoor units are installed  SW51: 1,
SW52: 2
Enable maximum capacity restriction for cooling Restrict excessive capacity increase when
On
operation operating indoor units with small capacity
K6
Disable maximum capacity restriction for cooling
Off -
operation
SW53 K7 K8 Selecting outdoor unit address
On On Outdoor unit address: No. 1 Main unit
On Off Outdoor unit address: No. 2 Sub unit 1
Off On Outdoor unit address: No. 3 Sub unit 2
Off Off Outdoor unit address: No. 4 Sub unit 3

80
 Setting outdoor unit option switches: B TYPE

ENGLISH
ffSetting outdoor install option
Step Button Display Description Note
Start
Outdoor unit address
Outdoor unit
Step1 Setting required -
display Outdoor unit address
Press (K1+K2)
00: Main unit
for 2 seconds Unit address
Step2 K4 x 1 time for module 01: Sub1 unit No
Main unit?
K4 x 2 times combination 02: Sub2 unit
K4 x 3 times 03: Sub3 unit Yes
If it is main unit, go to step4.
Quantity of indoor units
Step3 Otherwise, press K2 button for 2 seconds to save & exit
(system will be reset)
Quantity of indoor units
Step4 Press K1 Ready to set - No
Heat recovery?
K2 x n times X Tens digit (0 ~ 6)
Ex) 03: 3 units
Ones digit (0 Yes
Step5 K4 x n times X 64: 64 units
~ 9)
* K4: Press for 2 seconds - automatic detection of indoor units’ quantity Quantity of MCUs
If it is heat recovery model, go to step 7.
Step6 Otherwise, press K2 button for 2 seconds to save & exit
(system will be reset)
Quantity of MCUs * Heat recovery model only Save
Step7 Press K1 Ready to set -
K2 x n times X Tens digit (0 ~ 1)
Ex) 03: 3 units
Ones digit (0
Step8 K4 x n times X 16: 16 units
~ 9)
* K4: Press for 2 seconds - automatic detection of MCUs' quantity
Step9 K2: long Save Restart
* Press K1 for 2 seconds to exit without save regardless of setting step.

81
Setting outdoor unit option switch and key function
Installing and setting the option with tact switch and explanation of the functions

Setting the option

1. Press and hold K2 to enter the option setting. (Only available when the operation is stopped)
-- If you enter the option setting, display will show the following. (If you have set the 'Emergency operation for compressor
malfunction', 1 or 2 will be displayed on Seg 4.)

-- Seg 1 and Seg 2 will display the number for selected option.
-- Seg 3 and Seg 4 will display the number for set value of the selected option.
2. If you have entered option setting, you can shortly press the K1 switch to adjust the value of the Seg 1, Seg 2 and select
the desired option. (Refer to pages 83~85 for the Seg number of the function for each option)
Example)


3. If you have selected desired option, you can shortly press the K2 switch to adjust the value of the Seg 3, Seg 4 and change
the function for the selected option. (Refer to pages 83~85 for the Seg number of the function for each option)
Example)


4. After selecting the function for options, press and hold the K2 switch for 2 seconds. Edited value of the option will be
saved when entire segments blinks and tracking mode begins.

• Edited option will not be saved if you do not end the option setting as explained in above instruction.
CAUTION

❋❋ While you are setting the option, you may press and hold the K1 button to reset the value to previous setting.
❋❋ If you want to restore the setting to factory default, press and hold the K4 button while you are in the option setting
mode.
-- If you press and hold the K4 button, setting will be restored to factory default but it doesn't mean that restored setting
is saved. Press and hold the K2 button. When the segments shows that tracking mode is in progress, setting will be
saved.

82
 Optional item Input unit SEG1 SEG2 SEG3 SEG4 Function of the option Remarks
0 0 Disabled (Factory default)
Emergency
Set compressor 1 as E560 will occur when all
operation for 0 1
Individual 0 0 malfunction state the compressors are set as
compressor
Set compressor 2 as malfunction state.
malfunction 0 2
malfunction state
7-9 (Factory default in case

ENGLISH
0 0
of A type PBA)
5-7 (Factory default in case
0 1 Targeted evaporation
of B type PBA)
temperature [°C].
Cooling capacity 0 2 9-11
Main 0 1 (When low temperature value is
correction
0 3 10-12 set, discharged air temperature of
0 4 11-13 the indoor unit will decrease)
0 5 12-14
0 6 13-15
Unused Option Main 0 2 0 0 Unused Option Unused option by this model
0 0 100% (Factory default)
0 1 95 %
0 2 90 %
0 3 85 %
0 4 80 %
0 5 75 % When restriction option is set,
Current restriction
Individual 0 3 cooling performance may
rate 0 6 70 % decrease.
0 7 65 %
0 8 60 %
0 9 55 %
1 0 50 %
1 1 No restriction
Oil collection 0 0 Factory default
Main 0 4
interval 0 1 Shorten the interval by 1/2
Unused Option Main 0 5 0 0 Unused Option Unused option by this model
0 0 Factory default
Increase the outdoor unit's fan
speed to maximum value
• Do not use
this option in
Fan speed CAUTION
an ambient
correction for Individual 0 6 temperature over
outdoor unit 0 1 Increase fan speed
54 °C. Failing to do
so may overheat the
fan motor, causing it
to stop operating.

83
Setting outdoor unit option switch and key function
Optional item Input unit SEG1 SEG2 SEG3 SEG4 Function of the option Remarks
0 0 Disabled (Factory default)
0 1 LEVEL 1 / Auto Enables the silent mode for night-
0 2 LEVEL 2 / Auto time in cooling mode (It operates
0 3 LEVEL 3 / Auto automatically depending on the
Silent mode Main 0 7 temperature.)
0 4 LEVEL 4 / External contact However, if the external contact
0 5 LEVEL 5 / External contact interface module (MIM-B14) is
used, entering the silent mode is
0 6 LEVEL 6 / External contact available with contact signal.
0 0 Disabled (Factory default)
Level 1 of height difference
When outdoor unit is located
0 1 type 1 (Indoor unit is lower
40~80m above the indoor unit
than outdoor unit)
High-head Level 2 of height difference
Main 0 8 When outdoor unit is located over
condition setting 0 2 type 1 (Indoor unit is lower
80m above the indoor unit
than outdoor unit)
Height difference type 2
When indoor unit is over 30 m
0 3 (Outdoor unit is lower than
above the outdoor unit
indoor unit)
0 0 Disabled (Factory default)
Long-pipng When equivalent length of
condition farthest indoor unit from
0 1 LEVEL 1
setting (Setting the outdoor unit is between
Main 0 9
is unnecessary 100~170m
if high-head When equivalent length of
condition is set) 0 2 LEVEL 2 farthest indoor unit from the
outdoor unit is over 170m
0 0 Basic (Factory default) Energy control option of
0 1 Energy saving designated operation sequence
Energy control
Operaton ❋❋ Operating in energy saving
Main 1 0
mode, capacity might
(B type PBA) 0 2 Power decrease compared to normal
operation mode
Main 1 1 0 0 Unused Option Unused option by this model
Unused Option
Main 1 2 0 0 Unused Option Unused option by this model
Automatic setting (Factory
A U Address for classifying the
default)
Channel address Main 1 3 product from upper level
Manual setting for channel controller (DMS, S-NET 3, etc.)
0 ~ 15
0~15
Snow 0 0 Enabled (Factory default) During snow accmulation , the fan
accumulation Main 1 4 may spin even when the unit is
prevention control 0 1 Disabled not in operation

84
 Optional item Input unit SEG1 SEG2 SEG3 SEG4 Function of the option Remarks
Unused option Main 1 5 0 0 Unused option Unused option by this model
Unused option Main 1 6 0 0 Unused option Unused option by this model
0 0 Disabled (Factory default) Enabling this setting will
command the air conditioner to
cool faster at initial start-up.
Speed operation Main 1 7 However, this function will not

ENGLISH
0 1 Enabled
work when High-head condition
setting or Long-piping condition
setting is enabled.
Max. capacity 0 0 Enabled (Factory default) Restrict excessive capacity
restriction Main 1 8 increase when operating indoor
0 1 Disabled units with small capacity
(B type PBA)
Gasleak 0 0 Disabled (Factory default) If the gas leak occurred it should
Pumpdown Main 1 9 be entered in the pumpdown
0 1 Enabled operation.
(B type PBA)
Unused option Main 2 0 0 0 Unused option Unused option by this model
LA KIT option 0 0 Disabled (Factory default)
Main 2 1 Set when LA KIT is installed.
(B type PBA) 0 1 Enabled
0 0 Disabled (Factory default)
Emergency Indoor high humidity
operation for 0 1 condition (operating for up When set, emergency operation
indoor unit Main 2 2 to 12hours) is possible even if an indoor
communication Indoor low humidity communication error occurs.
error (B type PBA) 0 2 condition (operating for up
to 24hours)

❋❋ There is a risk of water leakage during emergency operation for indoor unit communication error. Please be careful when
using it.

85
Setting outdoor unit option switch and key function
Setting key operation and checking the view mode with tact switch

K1 K2 K3 K4

(A Type)
(B Type)

K1 control KEY operation Display on segment

Press and hold
Auto trial operation “K”“K”“BLANK”“BLANK”
1 time

K1 (Number of
KEY operation Display on segment
press)
1 time Unused “K”“1”“BLANK”“BLANK”
2 times Unused “K”“2”“BLANK”“BLANK”
3 times Unused “K”“3”“BLANK”“1”
4 times Unused “K”“3”“BLANK”“2”
5 times Unused “K”“3”“BLANK”“3”
6 times Unused “K”“3”“BLANK”“4”
7 times Vacuumig (Outdoor unit address 1) “K”“4”“BLANK”“1”
8 times Vacuumig (Outdoor unit address 2) “K”“4”“BLANK”“2”
9 times Vacuumig (Outdoor unit address 3) “K”“4”“BLANK “ “3”
10 times Vacuumig (Outdoor unit address 4) “K”“4”“BLANK”“4”
11 times Vacuuming (All outdoor units) “K”“4”“BLANK”“A”
12 times End Key operation -

86
 • After installing the product, be sure to perform leak tests on the piping connections. After pumping down
refrigerant to inspect or relocate the outdoor unit, be sure to stop the compressor and then remove the
WARNING
connected pipes.
-- Do not operate the compressor while a valve is open due to refrigerant leakage from a pipe or an unconnected
or incorrectly connected pipe. Failure to do so may cause air to flow into the compressor and too a high
pressure to develop inside the refrigerant circuit, leading to an explosion or product malfunction.

ENGLISH
K2 (Number of
KEY operation Display on segment
press)
1 time Refrigerant charging in Cooling mode “K”“5”“BLANK”“BLANK”
2 times Trial operation in Cooling mode “K”“6”“BLANK”“BLANK”
3 times Pump down all units in Cooling mode “K”“7”“BLANK”“BLANK”
4 times Trial operation in Cooling mode “K”“8”“BLANK”“BLANK”
“K”“9” X X (Display of last two digits may differ
5 times Checking the amount of refrigerant
depending on the progress)
6 times Discharge mode of DC link voltage “K”“A”“BLANK”“BLANK”
7 times Unused “K”“B”“BLANK”“BLANK”
8 times Forced oil collection “K”“C”“BLANK”“BLANK”
9 times Inverter compressor 1 check “K”“D”“BLANK”“BLANK”
10 times Inverter compressor 2 check “K”“E”“BLANK”“BLANK”
11 times Fan 1 check “K”“F”“BLANK”“BLANK”
12 times Fan 2 check “K”“G”“BLANK”“BLANK”
A type PBA End key operation -
13 times
B type PBA Unused “K”“H” X X
14 times B type PBA End key operation -

❋❋ During "Discharge mode of DC link voltage", voltage of INV1 and INV2 will be displayed alternately.
❋❋ Even when the outdoor unit power is off, it is dangerous when you come in contact with inverter PCB and fan PCB since
they are charged with high DC voltage.
❋❋ When pressing K2 key 9 to 12 times without inverter checker, error code can be displayed on segment even though the
outdoor unit is normal.
❋❋ When replacing/repairing the PCB, cut-off the power and wait until the DC voltage is discharged before replacing/
repairing them. (Wait for more than 15 minutes to allow it to discharge naturally.)
❋❋ When there were error, 'Dicharge mode of DC link voltage' may not have been effective. Especialy if error E464 and E364
have been occured, power element might be damaged by fire and therefore, do not use the 'Discharge mode of DC link
voltage'.

K3 (Number of
KEY operation Display on segment
press)
1 time Intialize (Reset) setting Same as initial state

87
Setting outdoor unit option switch and key function

K1 K2 K3 K4

(B Type)
(A Type)

K4 (Number of Display on segment

KEY operation
press) SEG 1 SEG2, 3, 4
1 time Outdoor unit model 1 AM160MXVAFC  Off, 1, 6
2 times Order frequency (Compressor 1) 2 120 Hz  1, 2, 0
3 times Order frequency (Compressor 2) 3 120 Hz  1, 2, 0
4 times High pressure (MPa) 4 1.52 MPa  1, 5, 2
5 times Low pressure (MPa) 5 0.43 MPa  0, 4, 3
6 times Discharge temperature (Compressor 1) 6 87 °C  0, 8, 7
7 times Discharge temperature (Compressor 2) 7 87 °C  0, 8, 7
8 times IPM temperature (Compressor 1) 8 87 °C  0, 8, 7
9 times IPM temperature (Compressor 2) 9 87 °C  0, 8, 7
10 times CT sensor value (Compressor 1) A 2 A  0, 2, 0
11 times CT sensor value (Compressor 2) B 2 A  0, 2, 0
12 times Suction temperature C -42 °C  -, 4, 2
13 times COND OUT temperautre D -42 °C  -, 4, 2
14 times Temperature of liquid pipe E -42 °C  -, 4, 2
15 times TOP temperature (Compressor 1) F -42 °C  -, 4, 2
16 times TOP temperature (Compressor 2) G -42 °C  -, 4, 2
17 times Outdoor temperature H -42 °C  -, 4, 2
18 times EVI inlet temperature I -42 °C  -, 4, 2
19 times EVI outlet temperature J -42 °C  -, 4, 2
20 times Unused K Unused
21 times Unused L Unused
22 times EVI EEV step M 300 steps  3, 0, 0
23 times Unused N Unused
24 times Fan step (SSR or BLDC) O 13 steps  0, 1, 3
25 times Current frequency (Compressor 1) P 120 Hz  1,2,0
26 times Current frequency (Compressor 2) Q 120 Hz  1,2,0
27 times Suction 2 temperature (H/R) R -42 °C  -, 4, 2
Master indoor unit not selected  BLANK, N, D
28 times Master indoor unit address S If indoor unit No.1 is selected as the master unit  0,
0, 1
29 times Snow sensor voltage T 1.80V 1,8,0

88
K4 (Number of Display on segment
press)
Press and hold Displayed content
page1 page2
the K4 to enter
the setting
1 time Main version MAIN Version (ex. 1412)

ENGLISH
2 times Hub version HUB Version (ex. 1412)
3 times Inverter 1 version INV1 Version (ex. 1412)
4 times Inverter 2 version INV2 Version (ex. 1412)
5 times Fan 1 version FAN1 Version (ex. 1412)
6 times Fan 2 version FAN2 Version (ex. 1412)
7 times EEP version EEP Version (ex. 1412)
SEG1 SEG2 SEG3, 4
Automatically assigned address of the
8 times AUTO Address
units Indoor unit: “A” Indoor unit: “0”
(ex: 07)
SEG1 SEG2 SEG3, 4
9 times Manually assigned address of the units MANU Address
Indoor unit: “A” Indoor unit: “0”
(ex: 15)

89
Things to check after completing the installation
1. Before supplying the power, use DC 600 V (AM✴✴✴✴XVAF✴) insulation resistance tester to measure the power (3
phase: R, S, T) terminal and the outdoor unit grounding.
-- Measurement should be over 30MΩ.
2. Before supplying the power, use a voltmeter and phase tester to check the voltage and the phase.
-- R, S, T terminal: Check the 230V (AM✴✴✴✴XVAF✴) between wires (R-S, S-T, T-R)
[AM✴✴✴✴XVAF✴]
T
230V 230V
S
230V
R
<ELB>

• Never measure the communication terminal since communication circuit may get damaged.
CAUTION • Check for short-circuit of the communication terminal with a general circuit tester.

3. Check if the R-410A indoor units are connected.

4. Check the following after the installation is completed.

• Have you checked the external surface and the inside of the outdoor unit?
• Is there any possibility of short-circuit caused by the heat of an outdoor unit?
Outdoor unit
• Is the place well-ventilated and ensures space for service?
• Is the outdoor unit fixed securely to withstand any external force?
Installation work
• Have you checked the external surface and the inside of the indoor unit?
• Is there enough space for service?
Indoor unit
• Have you checked if the center of the indoor unit is ensured and it is installed
horizontally?
• Have you selected correct pipes?
• Are the liquid and gas valve open?
• Is the total number of connected indoor units within the allowable range?
• Are the length and the height difference between the refrigerant pipes
within the allowable range?
• Are the branch joints properly installed?
Refrigerant pipe work
• Did you check the connection of liquid and gas pipes?
• Have you selected correct insulator for pipes and insulated them correctly?
• DId you insulate the pipes and connection part correctly?
• Is the quantity of the additional refrigerant correctly weighed in? (You must
record the amount of additional refrigerant on the service record paper
placed inside of the outdoor unit.)
• Have you checked if the drain pipes of the indoor and outdoor unit are
connected together?
Drain pipe work
• Have you completed the drain test?
• Is the drain pipe properly insulated?

90
 • Are the power cable and communication cable tightened firmly on the
terminal board within the range of rated tightening torque?
• Have you checked for cross-connection of the power and communication
cables?
Electrical wiring work • Have you performed the earthing work 3 to the outdoor unit?
• Did you make sure to use 2-core cable (not multi-core cable) for the
communication cable?

ENGLISH
• Is the length of the wire within allowed range?
• Is the wiring route correct?
• Did you set the address of the indoor and outdoor units properly?
Setting address • Did you set the address of the indoor and outdoor units properly? (When
using multiple remote controllers)
• If there is a possibility of the outdoor unit from vibrating, check whether the
Option
anti-vibration frame is correctly installed.

91
Inspection and test operation
Precautions before test operation
CAUTION • When the outdoor temperature is low, turn on the main power 6 hours before beginning the operation.
-- If you start the operation immediately after turning on the main power, it may cause serious damage to the
part within the product.
• Do not touch the refrigerant pipe during or right after the operation.
-- Refrigerant pipe may be hot or cold during or right after the operation depending on the status of the
refrigerant which flows through the refrigerant pipe, compressor and other parts of the refrigerant cycle.
• Do not operate the product with its panel or protection nets off.
-- There is risk of personal injury from the parts that rotates, heated or with the high voltage.
• Do not turn off the main power immediately after stopping the operation.
-- Wait for at least 5 minutes before turning off the main power. If not, water leakage or other problems may
occur.
• Connect all the indoor units and the power supply for the outdoor unit and run auto address setting. Run auto
address setting even after changing the indoor unit PCB.

Checklist before auto trial operation

1. Check the power cable and communication cable of the indoor and outdoor unit.
2. Supply power to the outdoor unit 6 hours before trial operation to pre-heat the crank case heater.
3. Before supplying the power, use a voltmeter and phase tester to check the voltage and the phase.
-- R,S,T terminal: check the 230V between wires (R-S, S-T, T-R).
4. When the power is supplied, outdoor unit will execute tracking to check the indoor unit connection and other optional
functions.
5. Write down the installation report on the service history report paper attached on the front part of the control box.

• Supply power to the outdoor unit 6 hours before auto trial operation to pre-heat the crank case heater.
CAUTION

6. Guaranteed range of auto trial operation

For precise judgment, you must perform auto trial operation in below indoor/outdoor temperature condition.

50
Outdoor temperature [°C (°F)]

40

30

20
Cooling
10

-10

-20
5 10 15 20 25 30 35 40 45

Indoor temperature [°C (°F)]

-- Auto trial operation is not performed at -5 ° C outdoor or 5 ° C below indoor temperature.

-- In the temperature range marked with slashed pattern, system protection control may trigger during operation. (If the
system protection control is enabled, it can be hard to get the precise judgment after the auto trial operation.)
-- When the temperature is outside of guaranteed range, accuracy of judgment on auto trial operation may decrease near
boarder line area.

92
 Auto trial operation
1. If the Auto Trial Operation is not completed, normal operation will be prohibited.
-- When the auto trial operation is not completed, UP (UnPrepared) will appear on the segment after the communication
check and restrict compressor from operating. (UP Mode will be cleared automatically when auto trial mode is
completed.)
-- Auto trial operation may take 20 minutes to maximum 2 hours depending on the operation status.

ENGLISH
-- During auto trial operation, noise can be generated due to vavle inspection. (Check the product if abnormal noise
occurs continously)
2. When error occurs during auto trial operation, check the error code and take appropriate measures.
-- Refer to next couple of pages when E503, E505 or E506 error occurs.
-- Refer to service manual if you need inspection or when other errors occur.
3. When auto trial operation ends, use S-NET pro or S-CHECKER to issue a result report.
-- Refer to service manual for further actions if you have any items with "inspection required" sign on the result report.
-- After taking appropriate measure for the items with "inpection required" sign, run the auto trial operation again.
4. Check the following items by running trial operation.
-- Check if cooling operation performs normally.
-- Individual indoor unit control: Check for air flow direction and fan speed.
-- Check for abnormal operation noise from the indoor and outdoor unit.
-- Check for proper draining from the indoor unit during cooling operation.
-- Use S-NET pro to check the detail operation status.
5. Explain to the user how to use the air conditioner according to the user's manual.
6. Hand over the installation manual to the customer so they can keep it with them.
• Make sure to close the top and bottom part of the
outdoor unit cabinet during operation. If you operate
CAUTION
the unit with the front cabinet open, it may cause
damage to the product and you may not get the
precise data from S-NET pro.

93
Inspection and trial operation
Measure to take when E503 error occurs (When "inspection required" sign is appeared on result
report of S-NET pro)

No.
Is the service valve of the outdoor unit Open the service valve of the outdoor unit
opened?

Yes

No.
Is the quantity of the refrigerant Check for leakage. Perform vacuuming and
appropriate? charge refrigerant

Yes

1. Run trial operation mode for more than 30 minutes

2. Run Fan mode for more than 10 minutes
3. Restart the auto trial operation

• If the service valve need to be detected, corresponding outdoor unit will display the error.
CAUTION • If the service valve need to be detected, auto detection mode will end. Check both gas pipe and liquid pipe
service valves when detecting service valve.
• If the opreation range is not within guaranteed range, error may occur even though the product is normal.

94
Measure to take when E505, E506 error occurs

Eable vacuum mode on all outdoor units

ENGLISH
No.
Is the service valve of the outdoor unit
Open the service valve of the outdoor unit
opened?

Yes

Is the value on the pressure sensor of

the installed outdoor unit satisfy the
following? No.
Reset outdoor unit
"Max./Min. value difference of low
pressure > 2"
"Max./Min. value difference of high
pressure > 2"

Run trial operation

Yes

Disable vacuum mode on all outdoor units Analyze cycle data

Check/replace the abnormal pressure sensor

End

• When the auto trial operation for pressure sensor was executed before the pressure of the outdoor unit is
eqaulized (when there's close to no difference between high and low pressure), error may occur even though
CAUTION
the product is normal.
• If the pressure sensor need to be detected, all outdoor units will display the error.
• If the pressure sensor need to be detected, auto trial operation mode will end.
• To check for the pressure sensor with the problem, run trial operation for more than 1 hour and analyze the data
to check for a problem.

95
Automatic refrigerant amount detection function
This function detects amount of refrigerant in the system through refrigerant amount detection operation

Start

Press the Tact switch "K2" 5 times Input S-CHECKER signal

Satisfy the temperature condition Satisfy the temperature condition

Check the amount of refrigerant Check the amount of refrigerant

No No
Check stability Check stability

Yes Yes

Connect S-Net Pro Judge the amount of refrigerant

Judge the amount of refrigerant

Judgment on the amount of Judgment on the amount of

Judgment not Judgment not
refrigerant: Normal / Excessive / refrigerant: Normal / Excessive /
available available
Insufficient Insufficient

End

❋❋ After refrigerant amount detection is finished, if you see “K9 Ed” on the display and cannot check the refrigerant amount
from the S-net pro and S-checker, it means insufficient degree of supercooling.

96
 • If the temperature is out of the guaranteed range below, exact result will not be obtained.
CAUTION -- Indoor: 20~32 °C
-- Outdoor: 5~43 °C
• If the operation cycle is not stable, the operation of refrigerant amount check may be forcibly finished.
• Accuracy of the result may decrease if the product has not been operated for a long period of time or heat mode
has been operated before running the function of refrigerant amount check. Therefore, use the function of

ENGLISH
refrigerant amount check after operating the product in cool mode for at least 30 minutes.
• Product may trigger system protection operation depending on the installation environment. In this case, the
result of refrigerant amount check may not be accurate.
Actions to take for the check result
• Excessive amount of refrigerant
-- Discharge 5% of total amount of refrigerant and restart the refrigerant amount check.
• Insufficient amount of refrigerant
-- Add 5% of the total amount of refrigerant and restart the refrigerant amount check.
• Insufficient degree of supercooling
-- Add 10 % of the total amount of refrigerant and restart the refrigerant amount check.
• Judgment not available
-- Check if the function of refrigerant amount check is executed within the guaranteed temperature range. Run
trial operation to check if there are other problems on the system.

97
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