Catalogue/Engineering Data EDUA14-03

Ceiling Concealed Chilled Water

Fan Coil Unit Energy Saving Type
FWW200EC   FWW800EC
FWW300EC   FWW1000EC
FWW400EC   FWW1200EC
FWW500EC   FWW1400EC
FWW600EC
 Literature No.: EDUA14-03
Supersedes: ED-FWW-E-201311A

Contents
Nomenclature……………………………………………………………………………………… 2

Valve Nomenclature……………………………………………………………………………… 3

Features…………………………………………………………………………………………… 4

Specifications……………………………………………………………………………………… 6

Sound Data………………………………………………………………………………………… 7

Operating Limits…………………………………………………………………………………… 8

Water Flow Rate/Pressure Drop Chart………………………………………………………… 8

Outlines and Dimensions……………………………………………………………………… 9

Electrical Data……………………………………………………………………………………… 10

Wiring Diagrams…………………………………………………………………………………… 10

Installation………………………………………………………………………………………… 11

Operation…………………………………………………………………………………………… 16

Valve Kit…………………………………………………………………………………………… 17

Wired Controller…………………………………………………………………………………… 20

Remote Control Indicator Panel………………………………………………………………… 24

Maintenance……………………………………………………………………………………… 24

Precautions………………………………………………………………………………………… 25

Troubleshooting…………………………………………………………………………………… 25

NOTE: Installation and maintenance are to be performed only by qualified personnel who are
familiar with local codes and regulations, and experienced with this type of equipment.

Caution: Sharp edges and coil surfaces are a potential injury hazard. Avoid contact with them.

Warning: Moving machinery and electrical power hazard. May cause severe personal
injury or death. Disconnect and lock off power before servicing equipment.

1
Nomenclature

FWW 1000 EC 5 L C X - A 0 A C

Sales Area: C - China

E - Oversea
R - Rohs

Power Supply: A - 220V/1Ph/50Hz
F - 380V/3Ph/50Hz
K - 204~230V/1Ph/60Hz
Electric Heater: 0 - 0kW; 1 - 1.0Kw
Drain Pan: A - Standard; B - 100mm extended;
E - Stainless steel standard length
Air Filter: X - Without; F- 8mm nylon filter
Return Air Plenum: B - Rear; D - Bottom; C - Without
Connection Type: L - Left; R - Right
ESP: 1 - 12Pa; 3 - 30Pa; 5 - 50Pa
Product series: DC Brushless 3 row 2 pipe
Capacity
DAIKIN Ceiling Concealed Chilled Water FCU

2
Valve Nomenclature

FWW - 2V 4 Y B R A E
E-Export
U-Stick "Made In China"
Power Supply:
A-220-240V/1Ph/50Hz
K-208-230V/1Ph/60Hz
Pipe Connection
R-for Right hand unit
L-for Left hand unit
Valve Type
B-with Ball Valve
X-without Ball Valve
Strainer Type
Y-with Y-Strainer
X-without Y-Strainer

Union Size
Omitted-R3/4
4-R1

Valve model
2V:2-Way Valve Kit
3V:3-Way Valve Kit

FWW-DAIKIN FCU
(Only 2-pipe system is applicable)

3
Features
More Energy Saving
■ FWW-EC series fan coil unit significantly reduces power consumption for its outstanding energy saving feature.
Compared to traditional fan coil, FWW-EC series fan coil unit can save:
sav
ele e4
ctr 7
ic e %
ne
rgy

• 30% power consumption at high speed

• 40% power consumption at medium speed Average power
consumption of a
• 60% power consumption at low speed traditional fan coil Average power
unit is 73W. consumption of
FWW-EC series fan
coil unit is 38.8W.

■ Calculation of average power consumption

Fan coil unit works at partial load for most time around the year: 100%~75% cooling load for 10% time in a
whole year; 75%~50% cooling load for 50% time; cooling load less than 50% for 40% time.
Average power consumption = power consumption at high speed × 10% + power consumption at medium
speed × 50% + power consumption at low speed × 40%.
Compare power consumption between traditional fan coil unit and FWW-EC series fan coil unit.
Take units with air flow of 1020 m3/h for example, and the result is as follows:
Power Consumption Traditional FWW-EC Series
High Speed 93W 62W
Medium Speed 77W 46W
Low Speed 63W 24W
Average 73W 38.8W

Micro-computer Control Module

■ FWW-EC series fan coil unit uses brushless DC motor without Hall element instead of the traditional AC motor,
leading motor efficiency increasing significantly. Standard advanced microcomputer processing module,
matched elegant appearance controller, combined with DAIKIN accomplishments on terminal equipments for
decades, achieves such a classic generation of fan coil unit.

More Comfortable
■ Room temperature fluctuation is usually ±2°C if use traditional AC motor fan coil unit, and the fan has only three
speed, which could easily cause the supply air too hot or too cold.
■ Room temperature fluctuation can be limited to ±0.5 when use FWW-EC series fan coil unit, and air flow can
adjust at one rpm per step, so comfortable environment is widely available.

4
Lower Sound Level
■ No electromagnetic noise: units using brushless DC motor adopt electronic commutation to replace the
mechanical commutation, so as to avoid the electromagnetic interference and carbon brush noise in mechanical
commutation.
■ Lower running speed: the higher fan speed, the bigger sound level. Traditional fan coil units can only run under
three speed while fan coil units with stepless speed regulation can run at lower speed.
■ Fan silence technology
• Large diameter, wide impeller
• Dynamic and static balance test
• Even supply air
■ Use rubber bush between the fan and motor to achieve flexible connection, which effectively reduce the noise
and vibration of unit when on/off, loading/unloading.

More Healthy
■ Isolation of carbon dust pollution Use brushless DC motor without Hall element, with carbon brush commutation
removed to prevent indoor air pollution caused by toner dust.

5
Specifications
General Data
FWW-EC
MODEL FWW200EC FWW300EC FWW400EC FWW500EC FWW600EC FWW800EC FWW1000EC FWW1200EC FWW1400EC
m3/h 340 510 680 850 1020 1360 1700 2040 2380
HIGH
CFM 200 300 400 500 600 800 1000 1200 1400
m3/h 279 418 558 697 836 1115 1394 1673 1952
AIR FLOW MEDIUM
CFM 164 246 328 410 492 656 820 984 1148
m3/h 170 255 340 425 510 680 850 1020 1190
LOW
CFM 100 150 200 250 300 400 500 600 700
EXTERNAL STATIC
Pa/in.wg 12,30,50/0.05,0.12,0.20
PRESSURE

TOTAL COOLING W 2550 3550 4330 5200 6100 8200 9500 11500 13500
CAPACITY Btu/h 8701 12113 14775 17743 20814 27980 32415 39240 46064

SENSIBLE COOLING W 1515 2120 2850 3450 4050 5650 6750 8250 9250
CAPACITY Btu/h 5169 7234 9725 11772 13819 19279 23032 28150 31562

TOTAL HEATING W 3800 5800 6800 8650 10450 14000 16500 20250 23000
CAPACITY Btu/h 12966 19790 23203 29515 35657 47770 56300 69096 78479
m3/h 0.44 0.61 0.74 0.89 1.05 1.41 1.63 1.97 2.31
WATER FLOW RATE
USGPM 1.9 2.7 3.3 3.9 4.6 6.2 7.2 8.7 10.2
kPa 14.0 31.0 16.0 25.0 33.0 37.0 27.0 42.0 41.0
HEAD LOSS (Cooling)
in.wg. 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2 0.2

UNIT WEIGHT Kg 14.5 16.8 19.3 20.3 21.4 30.6 33.6 36.3 42.0
(Without plenum) lb 32.0 37.0 42.5 44.8 47.2 67.5 74.1 80.0 92.6

UNIT GROSS WEIGHT Kg 17.0 20.1 22.9 24.0 25.3 35.8 39.5 42.7 49.4
(Without plenum) lb 37.5 44.3 50.5 52.9 55.8 78.9 87.1 94.1 108.9

UNIT WEIGHT Kg 17.2 20.1 23.0 24.3 25.7 36.3 39.7 43.2 49.9
(With plenum) lb 37.9 44.3 50.7 53.6 56.7 80.0 87.5 95.2 110.0

UNIT GROSS WEIGHT Kg 19.7 23.4 26.6 28.0 29.6 41.5 45.6 49.6 57.3
(With plenum) lb 43.4 51.6 58.6 61.7 65.3 91.5 100.5 109.3 126.3
Without
Return Air mm 675x478x235 815x478x235 915x478x235 995x478x235 1095x478x235 1425x478x235 1525x478x235 1725x478x235 1985x478x235
Plenum

With Back
Return Air mm 675x516x235 815x516x235 915x516x235 995x516x235 1095x516x235 1425x516x235 1525x516x235 1725x516x235 1985x516x235
DIMENSIONS Plenum

With
Bottom
Return Air
mm 675x497x235 815x497x235 915x497x235 995x497x235 1095x497x235 1425x497x235 1525x497x235 1725x497x235 1985x497x235
Plenum

CONDENSATE
R3/4
DRAIN SIZE

NOTES:
1) ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.
2) ALL THE UNITS ARE BEING TESTED UNDER FOLLOWING CONTITION:
• COOLING-27°C DB/19.5°C WB INDOOR AND WATER INLET 7°C OUTLET 12°C
• HEATING-21°C DB INDOOR AND WATER 60°C INLET.WATER FLOW:WAME WITH COOLING CONDITION.
3) SOUND PRESSURE LEVEL ARE ACCORDING TO MICROPHONE POSITION OF THE MEASUREMENT POINT
IS 1m IN FRONT AND

6
Components Data

FWW-EC
FWW200EC FWW300EC FWW400EC FWW500EC FWW600EC FWW800EC FWW1000EC FWW1200EC FWW1400EC
TYPE GALVANIZED STEEL DOUBLE STAGE IMPELLER CENTRIFUGAL (BLADE: FORWARD)
FAN
QUANTITY 1 2 2 2 2 3 4 4 4
TYPE SINGLE PHAZE BALL BEARING CAPACITOR RUNNING
MOTOR QUANTITY 1 1 1 1 1 2 2 2 2
IP/INSULATION GRADE IP44/B
MATERIAL COPPER
mm 9.52
DIAMETER
TUBE in 0.37
mm 0.33
COIL THICKNESS
in 0.01
MATERIAL HYDROPHILIC ALUMINUM
FIN ROW 3
FIN PER INCH 12

NOTES:
ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.

Sound Data
FWW-EC
Model FWW200EC FWW300EC FWW400EC FWW500EC FWW600EC FWW800EC FWW1000EC FWW1200EC FWW1400EC
High dBA 34.0 35.5 37.0 40.0 44.5 43.0 47.0 47.5 50.5
Sound Pressure
Middle dBA 27.2 29.1 29.7 32.6 37.1 36.9 39.0 41.9 41.9
Level (ESP:12 Pa)
Low dBA 20.9 18.9 22.5 24.0 30.1 29.6 29.2 32.0 30.8
High dBA 37.5 39.0 41.0 42.5 46.5 44.5 48.0 50.0 50.5
Sound Pressure
Middle dBA 31.0 33.5 33.0 35.1 39.8 37.8 40.0 42.7 42.0
Level (ESP: 30 Pa)
Low dBA 23.0 20.0 25.0 25.8 32.5 30.3 30.6 35.6 33.5
High dBA 39.0 42.0 44.0 45.0 48.0 46.0 49.5 52.5 52.0
Sound Pressure
Middle dBA 35.5 35.7 36.6 38.1 41.9 38.6 42.2 45.1 44.2
Level (ESP: 50 Pa)
Low dBA 23.8 27.2 27.4 28.5 34.0 30.5 33.5 36.4 35.8

NOTES:
1) ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.
2) SOUND PRESSURE LEVEL ARE ACCORDING TO MICROPHONE POSITION OF THE MEASUREMENT POINT IS 1m
IN FRONT AND 1m BELOW THE UNIT.

7
Operating Limits
Operating Limits FWW-EC
Water Circuit
Max. Water side pressure 1.6MPa
Min. Entering water temperature 3ºC (cooling)
Power supply
Operating voltage limits ±10% Volt
Operating frequency limits ±2Hz

Water Flow Rate/Pressure Drop Chart

FWW300EC FWW800EC FWW1200EC

FWW400EC

FWW500EC

FWW200EC

FWW600EC

FWW1400EC

FWW1000EC

8
Outlines and Dimensions

WITHOUT PLENUM Unit: mmUnit: mm

A A Number of
MODEL Standard Drain B C D Number Of
MoldePan Standard
Long Drain Pan
Long Drain B C DFans
a
Fans
TERMINAL BOX
MCW200A 675Drain675+ Pan Pan
452 487 490 1
MOUNTING HOLE ×16 MCW300A
FWW200EC 815 675815+a 675+a
592 452
627 487
630 490 2 1
CONDENSATE DRAIN R3/4″ FWW300EC
MCW400A 915 815915+a 815+a
692 592
727 627
730 630 2 2
MCW500A
FWW400EC 995 915995+a 915+a
772 692
807 727
810 730 2 2
AIR VENT

FWW500EC
MCW600A 1095 1095+a
995 995+a
872 772
907 807
910 810 2 2
MCW800A
FWW600EC 1425 1425+a
1095 1095+a
1202 872
1237 907
1240 910 3 2
MCW1000A 1525 1525+a
WATER SUPPLY FWW800EC 1425 1425+a
1302 1202 1237
1337 1340 1240 4 3
Rc3/4″ MCW1200A 1725 1725+a
FWW1000EC 1525 1502
1525+a 1537
1302 1337 1540 1340 4 4
MCW1400A 1985 1985+a
WATER RETURN
Rc3/4″ FWW1200EC 1725 1762
1725+a 1797
1502 1537 1800 1540 4 4
FWW1400EC
Note: 1985drain pan 1985+a
The length of extended 1762
has 100,200,300 optional1797 1800 4
Note:The length of extended drai n pan has 100,200,300 optional
WITH BACK RETURN AIR PLENUM
Unit: mm
Unit: mm
A
A Number Of
Molde
MODEL Standard LongB Drain C B DC D E E F F Number of
Standard Drain Fans
Fans
TERMINAL BOX Pan Drain Pan
Long Drain Pan
Pan
MCW200A 675 675+a 452 487 470 1
MOUNTING HOLE ×16 FWW200EC 675 675+a 452 487 470522 522 552
552 1
MCW300A 815 815+a 592 627 610 2
CONDENSATE DRAIN R3/4″ FWW300EC 815 815+a 592 627 610662 662 692
692 2
MCW400A 915 915+a 692 727 710 762 792 2
AIR VENT FWW400EC 915 915+a 692 727 710 762 792 2
MCW500A 995 995+a 772 807 790 2
FWW500EC 995 995+a 772 807 790842 842 872
872 2
MCW600A 1095 1095+a 872 907 890 942 972 2
FWW600EC 1095 1095+a 872 907 890 942 972 2
MCW800A 1425 1425+a 1202 1237 1220 3
WATER SUPPLY FWW800EC 1425 1425+a 1202 1237 12201272 1272 1302
1302 3
Rc3/4″ MCW1000A 1525 1525+a 1302 1337 1320 1372 1402 4
FWW1000EC 1525 1525+a 1302 1337 1320 1372 1402 4
MCW1200A 1725 1725+a 1502 1537 1520 1572 1602 4
WATER RETURN
Rc3/4″
FWW1200EC 1725 1725+a 1502 1537 1520 1572 1602 4
MCW1400A 1985 1985+a 1762 1797 1780 4
FWW1400EC 1985 1985+a 1762 1797 17801832 1832 1862
1862 4
Note: The length of extended drain pan has 100,200,300 optional
Note:The length of extended drain pan has 100,200,300 optional

WITH BOTTOM RETURN AIR PLENUM

Unit: mm
Unit: mm
A Number of
MODEL B C D E
Long Drain Pan A
TERMINAL BOX Standard Drain Fans
Pan Number Of
MOUNTING HOLE ×16 Molde 675
MCW200A Standard
675+a 452Drain 487B
Long C
522 D552 E F 1
Fans
CONDENSATE DRAIN R3/4″ MCW300A 815 Drain815+
Pan a Pan
592 627 662 692 2
AIR VENT FWW200EC
MCW400A 915 675915+a 675+a
692 452
727 487
762 522
792 552 491 2 1
FWW300EC
MCW500A 995 815995+a 815+a
772 592
807 627
842 662
872 692 631 2 2
FWW400EC
MCW600A 1095 915
1095+a 915+a
872 692
907 727
942 762
972 792 731 2 2
WATER SUPPLY FWW500EC
MCW800A 1425 995
1425+a 995+a
1202 772
1237 807
1272 842
1302 872 811 3 2
Rc3/4″
FWW600EC
MCW1000A 1525 1095
1525+ a 1095+a
1302 872
1337 907
1372 942
1402 972 911 4 2
WATER RETURN
Rc3/4″
FWW800EC
MCW1200A 1725 1425
1725+a 1425+a
1502 1202
1537 1237
1572 1272
1602 1302 1241 4 3
FWW1000EC
MCW1400A 1985 1525
1985+a 1525+a
1762 1302
1797 1337
1832 1372
1862 1402 1341 4 4
FWW1200EC 1725 1725+a 1502 1537 1572 1602 1541 4
Note: The length of extended drain pan has 100,200,300 optional
FWW1400EC 1985 1985+a 1762 1797 1832 1862 1801 4
Note:The length of extended drain pan has 100,200,300 optional

FILTER ELIMINATOR

9
Electrical Data
FWW-EC
MODEL FWW200EC FWW300EC FWW400EC FWW500EC FWW600EC FWW800EC FWW1000EC FWW1200EC FWW1400EC
INSULATION GRADE B
POWER SOURCE V/Ph/Hz 220V/1Ph/50Hz
RATED POWER
12Pa W 17 28 31 43 62 81 106 136 152
INPUT
MOTOR
RATED RUNNING
A 0.10 0.18 0.19 0.21 0.32 0.38 0.50 0.63 0.76
CURRENT
POLES 8P
INSULATION GRADE B
POWER SOURCE V/Ph/Hz 220V/1Ph/50Hz
RATED POWER
30Pa W 22 34 42 55 73 97 126 160 180
INPUT
MOTOR
RATED RUNNING
A 0.13 0.20 0.20 0.27 0.40 0.45 0.59 0.78 0.90
CURRENT
POLES 8P
INSULATION GRADE B
POWER SOURCE V/Ph/Hz 220V/1Ph/50Hz
RATED POWER
50Pa W 28 41 53 68 85 117 148 188 213
INPUT
MOTOR
RATED RUNNING
A 0.16 0.23 0.26 0.35 0.47 0.54 0.69 0.93 1.05
CURRENT
POLES 8P

NOTES:
1) ALL SPECIFICATIONS ARE SUBJECTED TO CHANGE BY THE MANUFACTURER WITHOUT PRIOR NOTICE.
2) ALL ELECTRIC DATA ARE BEING TESTED UNDER HIGH SPEED.

Wiring Diagrams

10
Installation
1. The unit can be installed only by professionals that are familiar with the series of air conditioners and
local laws and regulations.
2. Make the following preparations before the unit is ready and installed:
I Ensure that there is sufficient space for unit installation and maintenance (see the unit hoisting
diagram).
II Confirm the space for pipeline placement and cable layout.
III Check the hoisting structure. The hoisting point of unit must be secure and hard enough to bear the
weight of the unit and the vibration during unit operating.
3. Do not carry the unit by holding the fan volute or impeller during unit installation.
4. Hoist the unit horizontally; otherwise, the condensate water may overflow. It is recommended to fix the
unit during hoisting by using full-thread screws (diameter: 6 mm to 8 mm), flat gaskets, spring washers,
and nuts.
5. The following figure shows the structure and dimensions of a unit without return air plenum. For the
structure and dimensions of a unit with return air plenum, see the other technical materials.

 
  Unit: mm
  A
 Long
Standard  C Number
   Molde Drain B D  


 Of Fans



 Drain Pan
 Pan

 
    
 


  
FWW200EC
 675
  675+a


452 
487 490

1   






FWW300EC
 815
  815+a
 592 627 630 2  
     
FWW400EC 915  915+a 692 727 730 2



     
 
 


  FWW500EC  995  995+a 772 807 810 2



  
      
  FWW600EC
 1095 1095+a 
872 907 910
 2  


      




   FWW800EC
 1425 1425+a 
1202 
1237 1240 3  
  
 


 
FWW1000EC
 
1525 
 1525+a 
1302 
1337 1340 4   


 
 

 







FWW1200EC
 
1725 
 1725+a 1502 
1537
 1540
 4   








FWW1400EC 1985 1985+a 1762 
1797 1800
 4 
 
 

6. Install the unit by referring to the following diagram.

 

 


  

11
7. Length of the duct connecting to the unit must match the rated static pressure over outlet of the unit; otherwise,
the unit may break down. It is commended that the duct and unit be connected by a flexible connector tube.
The duct must also be installed in accordance with local laws and regulations.
8. Use a reducer when the unit duct does not fit the supply outlet.
9. For the unit without the air filter, install the air filter near the return air inlet to avoid dust particle blockage and
to ensure the heat exchanging performance.
10. Use flexible connector tubes to connect the water entering and leaving pipes of the unit. Seal the joint with tape
after connection. Keep the wrench near the water entering and leaving pipe during pipeline connection. Fasten
the joints slowly at a constant speed. The torque is 110 N m (11.2 kgf m) at most. When tools with long arm of
force are used, properly set the torque. An excessive torque can deform or even damage the copper pipe and
cause leakage. The pipeline connection is shown in the following figure.

11. Install the water filter near the inlet of the chilled water pump and the water inlet of unit to prevent the unit from
being blocked by dirt.
12. Implement strict thermal insulation measures on the valves, water entering pipe, water leaving pipe, and
condensate water pipe to avoid condensation.
13. Clean the unit after installation. Ensure that no sundries left on the drain pan; otherwise, the discharge of
condensate water can be blocked. Cover the unit to protect it if other constructions are still in progress,
because unit damage and tiny foreign substances inside the unit can cause malfunctions.
14. Ensure that the power supply is the same as that specified on the unit nameplate. Power off the unit before
installation. Electric connections must be conducted in accordance with the provided diagram, as shown in the
following figure. Proper grounding should be provided for the unit. (The grounding resistance is smaller than or
equal to 4 ohms.)

12
 Model: FWW200~1400EC

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FWW

DIP settings and electrical wiring diagrams for other functions are as follows:
(1) Condition of ON/OFF indicator and dial-up setting
Temperature control
Function
DIP
The on/off indicator is connected or disconnected based
ON
on the status of the cooling or heating valve.
SWP2.3
The on/off indicator is connected or disconnected based
OFF
on the on/off status of the master unit.
The default setting is OFF.
The following figure shows the electrical wiring for fault alarm output and on/off indicator.


When the unit or valve operates, the on/off status contactor is closed and the on/off external device turns on. In
the case of a fault in the unit, the fault status contactor is closed and the fault external device turns on.

13
(2) Electric heater
Electric Heater
Function
DIP
ON The electric heater function is enabled.
SWP2.4
OFF The electric heater function is disabled.
The default setting is OFF. (Note: In a four-pipe heat pump system, do not set the auxiliary heating function.)

The following figure shows the electric wiring for electric heater output signals.






 


(3) Three-wire valve

Three-Wire Valvedel
Function
DIP
ON The three-wire valve is enabled.
SWP2.5
OFF The three-wire valve is disabled.
The default setting is OFF.

The following figures show the electric wiring of a two-wire valve and three-wire valve.
Wiring of two-pipe cooling-only or Wiring of four-pipe heat pump system
heat pump system

















14
(4) Room card
A. If J1 port is connected, the unit disables the room card function.
B. If J1 port is disconnected, the unit enables the room card function.
a. If J1 port is disconnected when the unit is off, the unit is disabled.
b. If J1 port is disconnected when the unit is on, the unit works intermittently based on the room
temperature and working mode before the disconnection. If J1 port is disconnected in heating mode, the
room temperature will be kept between 18°C and 21°C. If J1 port is disconnected in cooling mode, the
room temperature will be kept between 25°C and 28°C. If J1 port is disconnected in air supply mode, the
unit is under standby mode.
15. The voltage, frequency, and phases of power must be the same as those specified on the unit nameplate. The
voltage range is ±10% of the rated value. The power frequency range is ±1% of the rated value.
16. Customers must install a circuit-break device with sufficient capacity near the inlet power cable. The circuit-
break device must support short-circuit protection and earthing-fault protection, and the clearance between
open contacts must be at least 3 mm.
17. All cables must be protected properly for safety. For example, cables cannot contact fans or motors, and
necessary measures must be taken to prevent the cables from water, dust, corrosion, vibration, and animal
bites.
18. Electrical data
Model FWW200EC FWW300EC FWW400EC FWW500EC FWW600EC
Power supply 220 V–/50 Hz
Max power input (W) 32 42 56 73 92
Max input current(A) 0.19 0.23 0.28 0.35 0.44
Section area
1 1 1 1 1
Power wires (mm2)
Quantity 3 3 3 3 3
Model FWW800EC FWW1000EC FWW1200EC FWW1400EC *
Power supply 220 V–/50 Hz
Max power input (W) 118 150 181 217 *
Max running current (A) 0.56 0.70 0.84 1.00 *
Section area
1 1 1 1 *
Power wires (mm2)
Quantity 3 3 3 3 *

NOTE:
THE MAX POWER INPUT IS TESTED UNDER 50Pa EXTERNAL STATIC PRESSURE.

19. After the installation, debug the unit and ensure that the unit operates properly.

15
Operation
1. Remove the sundries from the drain pan, fan volute, and places around the unit. Check pipeline connection
and cabling.
2. Wear protective devices before starting the unit. Do not touch any switch when your hands are wet.
3. Turn around the fan impeller with hands before unit operation. Ensure that the fan impeller turns smoothly
without colliding with the volute. Then, power on the unit and ensure that the rotation direction of impeller is
consistent with that specified on the unit nameplate.
4. Before the unit test run, close the water entering and leaving valves and clean the pipelines, then open the
water entering and leaving valves again.
5. During the unit test run, open the air vent on the unit water leaving pipe to discharge the air inside the
pipelines. Close the air vent until stream of water flowing out of the air vent.
6. Remove any obstacles from the places near the air outlet of unit and duct to ensure smooth ventilation.
7. Use clean and soft water to prevent scale formation. Scale formation on the heat exchanger can reduces
the heat exchanging performance, and hinders the water flow and pump efficiency with an increased water
resistance.
Requirements of water quality are listed in the following table:

Tendency
Item Base Value
Corrosion Scale Formation
pH value (25°C) 7.5 to 9.0 О О
Conductivity
μS/cm < 800 О О
(25°C)
Cl- mg(Cl-)/L < 200 О
Standard item 2- 2-
SO mg(SO )/L < 200 О
Acid consumption
mg(CaCO3)/L < 100 K О
(pH=4.8)
Full hardness mg(CaCO3)/L < 200 K О
Fe mg(Fe)/L < 1.0 О О
2- 2-
S mg(S )/L 0 О
Reference item + +
NH mg(NH )/L < 1.0 K О
SiO2 mg(SiO2)/L < 50 K О

NOTE:
K INDICATES RELEVANT FACTORS THAT ARE INCLINED TO CORROSION OR SCALE FORMATION.

16
Valve Kit
The valve kit is applied for 2-pipe system.
The kit consists of (refer structure figure 0):
• 2/3 way valve body is made of brass, maximum working pressure 1.6MPa.
• Electric actuator has the following specifications:
-Power supply: 220V±10%/50/60Hz (±2Hz)
-Activation: ON/OFF
• Hydraulic kit for the installation of the valve on the heat exchanger, complete with 2 ball valves for
adjusting the water flow and for closing the water circuit when perform maintenance to the unit.
• Y-strainer protects unit from impurity, increases the service life and isolating valves.

Figure 0

All parts of 2-way valve kit are indicated in the figure 1. ( For right pipe connection unit.)

F
E A Ball valve
B Brass connector
C Y-strainer
D Water inlet pipe
E Water outlet pipe
A
F 2-way valve
B
C
Figure 1
D

All parts of 3-way valve kit are indicated in the figure 2. ( For right pipe connection unit.)

A Ball valve
B Brass connector
G C Y-strainer
D Connector pipe
F
A
E Water inlet pipe
B F 3-way valve
C G Water outlet pipe
E D

Figure 2

17
Installation
1. Install the 2-way valve kit as indicated in the pictures of figure 3. (For right pipe connection unit.) As
shown as detail A, firstly take apart connector, then install ① to unit with necessary sealing material . Fix
② between ① and ③. At last tighten ③, make sure all of connectors are sealed.
2. Install the 3-way valve kit as indicated in the pictures of figure 4. (For right pipe connection unit.) Detail is
as same as 2-way valve unit.

The valve kit has been pre-assembled for easy installation.

• Where needed the connections are pre-coated with sealing material.
• The connections are not tightened for easy adjustment.
• After determining the final position of the valve kit, tighten all connections to obtain water tightness.

WATER RETURN CONNECTION Rc3/4

WATER SUPPLY CONNECTION Rc3/4

209
65

220
203
ķ
ĸ
A
Detail A

146
Figure 3 2-Way Valve

218
153

Ĺ
300

ķ
ĸ
Detail A

WATER RETURN CONNECTION Rc3/4

WATER SUPPLY CONNECTION Rc3/4

A
210
120

Figure 4 3-Way Valve

18
Insulation
1. The insulation design and materials should be complying with local and national codes and regulations.
2. Chilled water pipes and all parts on the pipes should be insulated.

The flow resistance of the connecting valve/hydraulic kit assembly is obtained from the following formula:

△PW = (QW/100Kv)2

PW is the flow resistance (Pa)

QW is the water flow rate (m3/h)

Kv is the flow rate identified in the table

Conncetion Shut-off Pressure

Valve Model DN Valve Type KV
Type Difference (MPa)
MC-FCV3335G 20 Rc3/4" 3-way Valve 3.4 0.18
MC-FCV2334G 20 Rc3/4" 2-way Valve 3.0 0.18

Pipe Connection
1. Using suitable fittings as water pipe connections with reference to the outline and dimensions.
2. The water inlet is on the bottom while outlet on top.
3. The connection must be concealed with rubberized fabric to avoid leakage.
4. Tightening torque should not be too high when connecting water pipes, in order to avoid brass deformation
or water-leakage by torsion split.

Wiring
1. Refer to the wiring diagram of the appropriate controller.
2. For connection with the DAIKIN controller, position the water temperature probe into the appropriate
position. Refer to the dedicated controller installation and operation manual.

19
Wired Controller
1. The unit uses MC316 wired controller, which is applicable to fan coils in FWW-EC series.
Dimensions:

LCD interface

2. Functions of the wired controller are as follows:

ON/OFF the unit
Displaying operating parameters and status of the unit
Displaying unit error codes
Setting the temperature
Mode (cooling/heating/fan/auto)
Timer
Fahrenheit and Centigrade exchange
Remote thermostat (optional)
Supporting energy saving mode
Supporting power failure memory

3. Wired controller
(1) Status screen: displays set temperature, mode, air speed, clock, and timer.
(2) Infrared receiving window: receives infrared.
(3) On/off button: starts up and shuts down the unit.
(4) Mode button: switches the mode in cycle, that is, cooling > air supply > 
heating > automatic (only available to a four-pipe unit) > cooling. 

(5) Temperature detector: detects indoor temperature (reserved).

(6) Setting button: see operation guide.
(7) Fan speed button: switches the mode of air speed in cycle, that is, high 

speed > medium speed > low speed > automatic speed (there is no
automatic speed in fan mode).
(8) Temperature setting button ( △ ): raise the set temperature.
(9) Temperature setting button ( ▽ ): decrease the set temperature.

Special symbols on the status display screen:

20
4. Operation guide
(1) Set room temperature
Press the setting button once to display room temperature on the LCD


interface. In the right figure, the temperature is 22°C.

Do not press any button for five seconds or press any other function button to
exit the query status.


(2) Setting time

A. Setting a day of a week: Press the setting button consecutively for three
times to enter the day setting status and press △ or ▽ to adjust the value.
B. Adjusting the clock: Press the setting button again once more to enter the 
clock setting status and press △ or ▽ to adjust the value.
C. Do not press any button for five seconds to save the setting and exit the setting or press any other
function button to save the setting and exit the setting.

(3) Setting timing on/off and enabling

A. Press the setting button consecutively for five times to set timing on/off each day.
After setting a specific time point, press the setting button to confirm the setting and enter the clock
setting status for the next time. Press △ or ▽ to set the time.
B. After setting timing on/off each day of one week well, which means pressing the setting button
consecutively for 14 times. When clock setting and specific time setting flicker at the same time, press
△ once to enable timing start-up or press △ twice to disable timing start-up. Alternatively, press ▽
once to enable timing shutdown or press △ twice to disable timing shutdown.
C. Do not press any button for five seconds or press any other function button to save the setting and exit
the status.

(4) Fahrenheit and Centigrade exchange 

A. As shown in the right figure, press △ and ▽ at the same time to switch
Fahrenheit temperature and centigrade temperature.
B. Centigrade temperature ranges from 16°C to 30°C. Fahrenheit
temperature ranges from 61°F to 86°F. 

Defaulted as Centigrade temperature.

(5) Setting and querying communication

A wired controller can be used to query the status and set combined 

buttons.
A. Setting the Modbus address of a unit:
Press the fan speed button and △ at the same time to enter the Modbus address setting status. Press
△ or ▽ to set the address number. Press the fan speed button and △ at the same time again to
send the address of the wired controller. The address will be displayed in two hexadecimal digits. The
address number ranges from 01 to FE, that is 1 to 254 in decimal.
B. Querying the Modbus address of a unit:
Press the fan speed button and ▽ at the same time to query the address. The Modbus address of the
unit will be displayed on the wired controller.

21
5. The energy saving mode and power failure memory function can be set at the back of the wired controller.
(1) Power failure memory
This function avoids wired controller has power failure memory function. After the power is resumed, the
wired controller displays the status and parameters that are set before a power failure if the power failure
memory function is enabled.
You can set the function by using SW1.4 DIP, as shown in the following table.
SW1.4 Status Function
ON Power failure memory is enabled.
OFF Power failure memory is disabled.
The default setting is OFF.

(2) Energy saving

You can set the function by using SW1.3 DIP, as shown in the following table.
SW1.3 Status Function
ON Energy saving is enabled.
OFF Energy saving is disabled.
The default setting is ON.

6. An infrared remote controller can be equipped on the wired controller. The receiving diameter is 8 meters within
an angle of 30°. An infrared remote controller can be used to set only basic functions and cannot be used to
set time or the timing function. (Optional)
Operation panel of an infrared remote controller:
(1) Fan button
(2) ON/OFF button
(3) Temperature raise button
(4) Temperature decrease button
(5) Mode button

7. Wired controller installation guide

(1) Remove the bottom shell
Insert a flat-head screwdriver into the fitting hole of the top shell and push the hook of the bottom shell
slightly to remove the bottom shell. (Note: Do not damage the PCB.)

22
 (2) Fix the button shell and install wired controller connection
A. Fasten the bottom shell of the wired controller to a flat surface of a hidden box with two accessory
screws. Do not tighten the screws too much; otherwise, the bottom shell may be damaged.
B. Recommended wired controller connection
Cable Type 2-core polyvinyl chloride jacketed and insulated flexible
cable (cable with shield layer is recommended)
Cable Specification 0.5–1.0 mm2
Strip only 7 mm to 8 mm jacket at the end of the cable connecting to the wired controller. At the other
end of the cable, prevent the core from being exposed when stripping the jacket and connecting the
cable to the module SLM terminal.
Note: The cable should be shorter than 20 m. Otherwise, signals may be interfered.
C. The following figure shows the installation and connection of the wired controller.

(3) Fix the top shell and bottom shell of the wired controller, as shown in the following figure.

Note: Do not clamp cables while fixing the shells. Do not touch the printed circuit board directly with your
hand.

8. Precautions
(1) Power off the wired controller before installing or maintaining it. The wired controller should be installed or
maintained by authorized personnel.
(2) Do not remove or insert the connection when the wired controller is powered on. Otherwise, electric shock
or other damage may be caused. Do not place the wired controller under direct sunlight or in an extremely
humid environment.
(3) When installing the wired controller, do not hole it at random. Install the wired controller on a flat surface.
Do not hit the display screen against any hard object or press the display screen with force.
(4) Use accessory screws to fasten the wired controller. Screws in other specifications are not allowed.
(5) If the wired controller operates abnormally in a long time, contact the supplier.

23
Remote Control Indicator Panel
The unit uses MC313 remote control indicator panel, which is applicable to fan coils in FWW-EC series.
Dimensions:

   

This remote control indicator panel matches with G4 remote controller, which can be used to set the energy saving
mode and power failure memory function.
Set the temperature to 16°C and press the power button to enable energy saving. Set the temperature to 17°C and
press the power button to disable energy saving.
Set the temperature to 18°C and press the power button to enable power failure memory. Set the temperature to
19°C and press the power button to disable power failure memory.
For details, refer to user guide to G4 remote controller.

Maintenance
1. The unit must be maintained routinely by professionals.
2. Before maintenance or repairing, cut off the power and place a warning sign (for example, "Unit Is Under
Repair, Do Not Turn on the Power") near the power.
3. Clean the air filter at least every two months (the cleaning frequency varies with the operation performance and
environment) to ensure smooth air returning.
4. Clean the heat exchanger at least every six months. (The cleaning frequency varies with the operation
performance and environment.) Do not push down or damage the fins, and repair pushed-down fins. Alkaline
cleaning solution cannot be used to clean heat exchanger fins.
5. Check the unit routinely: remove the sundries from the drain pan; clean the unit; ensure that the motor and fan
are fixed securely.
6. Cut off the unit power if the unit is not used for a long time. Ensure well insulation before the unit is started up
in the next time.
7. When the unit is not operating, ensure that the coil is full of water to minimize corrosion if the ambient
temperature is above 0°C; if the ambient temperature is 0°C or below 0°C, adopt either of the following freeze-
proofing measures: (1) ensure continuous operation of the circulating pump; (2) add antifreeze agent with
proper concentration; (3) drain the water in the coil.

24
Precautions
1. Do not stop the running of unit when cold water is being provided continuously; otherwise, the unit and
adjacent object surface may have condensation.
2. High-temperature and humid air may cause unit condensation. Therefore, install the unit in a place where
doors are not opened and closed frequently, and away from the vent and places where vapor may generate.
3. Condensation may occur when the unit is operating in a moist environment. Increase the water entering
temperature or reduce the water flow to avoid condensation.
4. Long-time operation may cause unit condensation. Please install the electric control valve and temperature
controller.
5. The noise at sound pressure level specified on the unit nameplate is obtained based on the test in National
Standard (GB) in a hemi-anechoic chamber with the background noise set to 11.5 dB(A). In practice, the unit
installation and onsite pipe connection can affect the unit noise.
6. For unit performance parameters, see the unit nameplate.
7. Do not reconstruct the unit; otherwise, the unit performance may degrade, and disasters such as operation
failure, electric shock, and fire may occur.

Troubleshooting
in the case of abnormal status during unit operation, check the unit according to the following table. If the
problem still cannot be resolved, contact the seller.
Problem
Possible Causes Recommended Solution
Description
Power failure or the unit power is not on. Wait until the power is on or turn on the unit power.
The unit does
The power plug is loose. Plug in the power plug properly.
not operate.
The motor is damaged. Replace the motor.
The motor bearing is damaged. Replace the motor.
Screws for fixing the fan and motor are loose. Fix the screws securely.
Abnormal noise
and vibration The fan volute is deformed and collides with the fan
Replace the fan.
occur during unit impeller, or the impeller is deformed.
operation. Sundries exist in the ventilation outlet or the duct. Remove the sundries.
The air filter is blocked. Clean the filter.
The air supply The return air inlet or air outlet of unit is blocked. Remove the obstacle.
is not smooth
or the air flow The air filter is blocked. Clean the filter.
volume is small.
The electric control valve of unit is not started. Start the electric control valve of unit.
The circulating pump is not started. As a result, the cold
Start the circulating pump.
or hot water does not flow.
The cooling or The heat exchanger fins are blocked or pushed down. Clean and repair the heat exchanger.
heating function Temperature of the cold water during cooling is too high,
fails. Adjust the configured temperature of the unit.
or temperature of the hot water during heating is too low.
The set temperature of temperature controller is Adjusted the set temperature of the temperature
inappropriate. controller.
The air filter is blocked. Clean the filter.
The condensate drain pan is blocked. Clean the condensate drain pan.
The unit is not installed horizontally. Adjust the place of the unit until it is placed horizontally.
Cold water is being provided continuously when the fan Stop the electric control valve of unit or operate the unit
has already stopped. at a low gear.
Water leaks.
Perform dehumidification and avoid the entering of high-
Ambient temperature too high.
temperature and high-humidity air into indoor places.
The discharge valve is loose. Tighten the discharge valve.
The unit piping leaks. Contact the seller.

25
If a fault occurs when the unit is running, the fault code will be displayed on the wired controller and
indicated by the remote control panel for easy troubleshooting.
Statuses of Indicators on the Remote Control
Code on the
Indicator Panel Fault Description
Wired Controller
COOL DRY/TIMER FAN HEAT
Communication failure between the main
LC Flashing Off Flashing Off
control board and driving board
Undervoltage or overvoltage on the DC
U2 Flashing Off Off Off
bus
L9 Off Flashing Off Off Motor stall
A6 Off Off Off Flashing Motor overcurrent
P1 Off Off Flashing Off Motor open-phase or disconnection
LA Flashing Flashing Off Off IPM module fault
L3 Flashing Off Off Flashing MCU overheat
CJ Off Flashing Off Flashing Indoor temperature sensor fault
DIP setting error (resetting is required
UA Flashing Flashing Off Flashing
according to the circuit diagram)
A1 Off Flashing Flashing Flashing Storage fault
Communication failure between the
U5 master board and wired controller
(reconnection is required)

26
Warning ● Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the
world. Daikin Industries, Ltd. does not have control over which products are exported to and used in
a particular country. Prior to purchase, please therefore confirm with your local authorized importer,
distributor and/or retailer whether this product conforms to the applicable standards, and is suitable
for use, in the region where the product will be used. This statement does not purport to exclude,
restrict or modify the application of any local legislation.
● Ask a qualified installer or contractor to install this product. Do not try to install the product yourself.
Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.
● Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or
contractor to install those parts and accessories. Use of unauthorized parts and accessories or
improper installation of parts and accessories can result in water or refrigerant leakage, electrical
shock, fire or explosion.
● Read the User’s Manual carefully before using this product. The User’s Manual provides important
safety instructions and warnings. Be sure to follow these instructions and warnings.
If you have any enquiries, please contact your local importer, distributor and/or retailer.

The air conditioners manufactured The airconditioning factories of

by Daikin Industries have received Daikin Industries have received
ISO 9001 series certification for environmental management system
quality assurance. standard ISO 14001 certification.
Certificate Number. 9601019 Certificate Number. EMS80362

Cautions on product corrosion

1. The units should not be installed in areas where corrosive gases, such as acid gas or alkaline gas, are produced.
2. If the unit is to be installed close to the sea shore, direct exposure to the sea breeze should be avoided. If you need to install the
unit close to the sea shore, contact your local distributor.

Dealer
Head Office:
Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,
Kita-ku, Osaka, 530-8323 Japan
Tokyo Office:
JR Shinagawa East Bldg., 2-18-1, Konan,
Minato-ku, Tokyo, 108-0075 Japan
http://www.daikin.com/global_ac/

© All rights reserved

Printed with soy ink.

Literature No.: EDUA14-03

Supersedes: ED-FWW-E-201311A