-EN-

EN- AMD 3-
3-168

Dear Customer,
thank you for choosing our product. In order to get the best performances out of this product, please read
this manual carefully.
To avoid incorrect operation of the equipment and possible physical risk to the operator, please read and
strictly follow the instructions contained in this manual.
Note, these instructions are in addition to the safety rules that apply in the country where the dryer is
installed. Before packing for shipment each AMD series refrigerated air dryer undergoes a rigorous test to
ensure the absence of any manufacturing faults and to demonstrate that the device can perform all the
functions for which it has been designed.

ENGLISH Once the dryer has been properly installed according to the instructions in this manual, it will be ready for
use without any further adjustment. The operation is fully automatic, and the maintenance is limited to few
controls and some cleaning operations, as detailed in the following chapters.
This manual must be maintained available in any moment for future references and it has to be
intended as inherent part of the relevant dryer.
Due to the continuous technical evolution, we reserve the right to introduce any necessary change without
giving previous notice.
Should you experience any trouble, or for further information, please do not hesitate to contact us.

DATA NAMEPLATE
The data nameplate is located
on the back of the dryer and
shows all the primary data of the
machine. Upon installation, fill in Model
Model
the table on the previous page
Serial No. Serial No.
with all the data shown on the
Code Code
data nameplate. This data
should always be referred to Nominal Flow Rate Nominal Flow Rate l/min
when calling the manufacturer Max Air Pressure barg
Max Air Pressure
or distributor. Max Inlet Air Temp.
Max Inlet Air Temp. °C
Ambient Temp. °C
Ambient Temp.
The removal or alteration of the Refrigerant type/kg
data nameplate will void the Refrigerant (Type and qty)
Refrig. Design Pres. HP/LP barg
warranty rights. Refrig. Design Pres. HP/LP
Electric Supply ph/V/Hz
Electric Supply
Electric Nominal Power W/A
Electric Nominal Power
Fuse Max. A
Fuse Max.
Manufactured
Manufactured

WARRANTY CONDITIONS
For 12 months from the installation date, but no longer than 14 months from the delivery date, the warranty
covers eventual faulty parts, which will be repaired or replaced free of charge, except the travel, hotel and
restaurant expenses of our engineer.
The warranty doesn’t cover any responsibility for direct or indirect damages to persons, animals or
equipment caused by improper usage or maintenance, and it’s limited to manufacturing faults only.
The right to warranty repairs is subordinated to the strict compliance with the installation, use and
maintenance instructions contained in this manual.
The warranty will be immediately voided in case of even small changes or alterations to the dryer. To
require repairs during the warranty period, the data reported on the identification plate must be notified.
AMD 3-
3-168 -EN-
EN- -EN-
EN- AMD 3-
3-168

1. SAFETY RULES 1. SAFETY RULES

1.1. Definition of the Conventional Signs Used in This Manual
1.2. Warnings
1.1. DEFINITION OF THE CONVENTIONAL SIGNS USED IN THIS MANUAL
1.3. Proper use of the dryer
1.4. Instructions for the use of pressure equipment according to ped directive 97/23/EC Carefully read instruction manual before attempting any service or maintenance procedures on the
dryer.
2. INSTALLATION
2.1. Transport Caution warning sign. Risk of danger or possibility of damage to equipment, if related text is not
2.2. Storange followed properly.
2.3. Installation site
2.4. Installation layout Electrical hazard. Warning message indicates practices or procedures that could result in personal
2.5. Correction factors injury or fatality if not followed correctly.
2.6. Connection to the compressed air system Danger hazard. Part or system under pressure.
2.7. Electrical connections
2.8. Condensate drain
Danger hazard. High temperature conditions exist during operation of system. Avoid contact until
3. START UP system or component has dissipated heat.
3.1. Preliminary operation
Danger hazard. Treated air is not suitable for breathing purposes; serious injury or fatality may
3.2. First start-up
result if precautions are not followed.
3.3. Start-up and shut down
Danger hazard: In case of fire, use an approved fire extinguisher, water is not an acceptable
4. TECHNICAL SPECIFICATIONS
means in cases of fire.
4.1. Technical specifications AMD 3-25 230V/50-60 Hz
4.2. Technical specifications AMD 32-168 230V/50Hz
Danger hazard. Do not operate equipment with panels removed.
4.3. Technical specifications AMD 32E-168E 230V/60 Hz
4.4. Technical specifications AMD 3P-25P 115V/60 Hz
4.5. Caratteristiche tecniche AMD 32P-75P 115V/60 Hz 1
Maintenance or control operation to be performed by qualified personnel only .
5. DESCRIZIONE TECNICA
5.1. Control panel ARIA
5.2. Operation AIR
LUFT Compressed air inlet connection point.
5.3. Flow diagram AIR

5.4. Refrigerating compressor ARIA

5.5. Condenser AIR
LUFT Compressed air outlet connection point.
5.6. Filter drier AIR

5.7. Capillary tube

5.8. Alu-dry module Condensate drain connection point.
5.9. Hot gas by-pass valve
5.10. Refrigerant pressure switches PA- PB- PV
5.11. Safety thermo-switc TS 1
Operations which can be worked out by the operator of the machine, if qualified .
5.12. DMC15 Electronic instrument (Air Dryer Controller)
5.13. Electronic level drain
NOTE : Text to be taken into account, but not involving safety precautions.
6. MAINTENANCE, TROUBLESHOOTING, SPARES AND DISMANTLING
6.1. Controls and maintenance In designing this unit a lot of care has been devoted to environmental protection:
6.2. Troubleshooting • CFC free refrigerants
6.3. Spare parts • CFC free insulation parts
6.4. Maintenance operation on the refrigerating circuit • Energy saving design
6.5. Dismantling of the dryer • Limited acoustic emission
• Dryer and relevant packaging composed of recyclable materials
7. LIST OF ATTACHMENTS
This symbol requests that the user heed environmental considerations and abide with suggestions
7.1. Dryers dimensions
annotated with this symbol.
7.2. Exploded view
7.3. Electic diagrams
1 Experienced and trained personnel acquainted with the relevant rules and laws, capable to perform the needed activities and to identify and
avoid possible dangerous situations while handling, installing, using and servicing the machine.
AMD 3-
3-168 -EN-
EN- -EN-
EN- AMD 3-
3-168

1.2. WARNINGS 1.4. INSTRUCTIONS FOR THE USE OF PRESSURE EQUIPMENT ACCORDING TO PED
Compressed air is a highly hazardous energy source. DIRECTIVE 97/23/EC
Never work on the dryer with pressure in the system. To ensure the safe operation of pressure equipments, the user must conform strictly to the above directive
Never point the compressed air or the condensate drain outlet hoses towards anybody. and the following :
The user is responsible for the proper installation of the dryer. Failure to follow instructions given in 1. The equipment must only be operated within the temperature and pressure limits stated on the
the “Installation” chapter will void the warranty. Improper installation can create dangerous situations manufacturer’s data nameplate.
for personnel and/or damages to the machine could occur. 2. Welding on heat-exchanger is not recommended.
Only qualified personnel are authorized to service electrically powered devices. Before attempting 3. The equipment must not be stored in badly ventilated spaces, near a heat source or inflammable
maintenance, the following conditions must be satisfied : substances;
• Ensure that main power is off, machine is locked out, tagged for service and power cannot be 4. Vibration must be eliminated from the equipment to prevent fatigue failure.
restored during service operations. 5. Automatic condensate drains should be checked for operation every day to prevent a build up of
• Ensure that valves are shut and the air circuit is at atmospheric pressure. De-pressurize the dryer. condensate in the pressure equipment.
6. The maximum working pressure stated on the manufacturer’s data nameplate must not be exceeded.
These refrigerating air dryers contain R134a or R404A HFC type refrigerant fluid. Refer to the Prior to use, the user must fit safety / pressure relief devices.
specific paragraph - maintenance operation on the refrigerating circuit. 7. All documentation supplied with the equipment (manual, declaration of conformity etc.) must be kept
Warranty does not apply to any unit damaged by accident, modification, misuse, negligence or for future reference.
misapplication. Unauthorized alterations will immediately void the warranty. 8. Do not apply weights or external loads on the vessel or its connecting piping.
TAMPERING, MODIFICATION AND IMPROPER USE OF THE PRESSURE EQUIPMENT ARE
In case of fire, use an approved fire extinguisher, water is not an acceptable means in cases of FORBIDDEN. Users of the equipment must comply with all local and national pressure
electrical fire. equipment legislation in the country of installation.

1.3. PROPER USE OF THE DRYER

2. INSTALLATION
This dryer has been designed, manufactured and tested for the purpose of separating the humidity normally
contained in compressed air. Any other use has to be considered improper. 2.1. TRANSPORT
The Manufacturer will not be responsible for any problem arising from improper use; the user will bear Check for visible loss or damage, if no visible damage is found place the unit near to the installation point
responsibility for any resulting damage. and unpack the contents.
Moreover, the correct use requires the adherence to the installation instructions, specifically:
• Always keep the dryer in the upright vertical position. Damage to components could result if unit is laid on
• Voltage and frequency of the mains. its side or if placed upside down.
• Pressure, temperature and flow-rate of the incoming air. • Store machine in a clean, dry environment, do not expose to severe weather environments.
• Ambient temperature. • Handle with care. Heavy blows could cause irreparable damage.
This dryer is supplied tested and fully assembled. The only operation left to the user is the connection to the
plant in compliance with the instructions given in the following chapters. 2.2. STORANGE
The purpose of the machine is the separation of water and eventual oil particles present in
Even when packaged, keep the machine
compressed air. The dried air cannot be used for breathing purposes or for operations leading to
protected from severity of the weather.
direct contact with foodstuff.
This dryer is not suitable for the treatment of dirty air or of air containing solid particles. Keep the dryer in vertical position, also when
stored. Turning it upside down some parts could
be irreparably damaged.
If not in use, the dryer can be stored in its
packaging in a dust free and protected site at a
maximum temperature of 50 °C, and a specific
humidity not exceeding 90%. Should the
stocking time exceed 12 months, please contact
the manufacturer.
SCC0001

The packaging materials are recyclable. Dispose of material in compliance with the rules
and regulations in force in the destination country.
AMD 3-
3-168 -EN-
EN- -EN-
EN- AMD 3-
3-168

2.3. INSTALLATION SITE 2.4. INSTALLATION LAYOUT

Failure to install dryer in the proper ambient conditions will affect the dryer’s ability to condense
refrigerant gas. This can cause higher loads on the compressor, loss of dryer efficiency and -A-
IN
performance, overheated condenser fan motors, electrical component failure and dryer failure due
to the following: compressor loss, fan motor failure and electrical component failure. Failures of
7
OUT
1 Air compressor
5
3 4 8
this type will affect warranty considerations. 2 Final refrigerator
Do not install dryer in an environment of corrosive chemicals, explosive gasses, poisonous 1
3 Condensate separator
gasses; steam heat, areas of high ambient conditions or extreme dust and dirt. 4
9
6 Pre-Filter (min. 5 micron)
Don’t use water to extinguish fire on the dryer 2 9
9
9
5 By-pass group
on in the surrounding area.
6 Dryer
Minimal installation requirements : -B- 7 Compressed air tank
IN
8 Final filter
• Select a clean room dry, free from dust, and protected 7
OUT
from atmospheric disturbances. 3 4
5
8 9 Condensate drain
• The supporting area must be smooth, horizontal and 1

able to hold the weight of the dryer.

DGT0002
6
• Minimum ambient temperature +1 °C. 9
2 9 9
• Maximum ambient temperature +45°C. 9

• Leave at least 1 meter of free space on every side of

the drier for ventilation purposes and maintenance In case of heavily polluted inlet air (ISO 8573.1 class 3.-.3 or worse quality), we recommend
operations. the additional installation of a pre-filter (5 micron minimum) to prevent a clogging of the
heat exchanger.
The dryer doesn't require to be fixed to the supporting
surface. The dryer needs to be fixed to the supporting Type A installation is suggested when the compressor operates at reduced intermittence and the total
surface only with particular installation procedures consumption equals the compressor flow rate.
(dryer on brakets, hanging units, etc.) Type B installation is suggested when the air consumption can consistently change with peak values highly
exceeding the flow rate of the compressors. The capacity of the tank must be sized in order to compensate
Dryer hanging (AMD 3-32 only): eventual instantaneous demanding conditions (peak air consumption).

Dryer A [mm] B [mm] C [mm] D [mm]

AMD 3 20 305 20 30
AMD 6-18 25 465 25 30
AMD 25 40 360 20 30
AMD 32 40 385 20 30
AMD 3-
3-168 -EN-
EN- -EN-
EN- AMD 3-
3-168

2.5. CORRECTION FACTORS 2.6. CONNECTION TO THE COMPRESSED AIR SYSTEM

Correction factor for operating pressure changes : Operations to be performed by qualified personnel. Never operate with plants under pressure.
Inlet air pressure barg 4 5 6 7 8 10 12 14 15 16 The user is responsible to ensure that the dryer will never be operated with pressure exceeding
Factor (F1) 0.77 0.86 0.93 1.00 1.05 1.14 1.21 1.27 1.30 1.33 the nominal values.
Eventual over-pressure could be dangerous both for the operator and the machine.
Correction factor for ambient temperature changes (Air-Cooled): The temperature and the amount of air entering the dryer must comply with the limits reported on the data
Ambient temperature ºC 25 30 35 40 45 plate. In case of treatment of air at particularly high temperatures, the installation of a final refrigerator could
Factor (F2) 1.00 0.98 0.95 0.88 0.80 result necessary. The cross section of the connecting piping, which must be free from dust, rust, chips and
other impurities, must be consistent with the flow-rate of the dryer.
Correction factor for inlet air temperature changes: In order to facilitate the maintenance operations, a by-pass group has been installed, as shown in the
Air temperature following illustration.
30 35 40 45 50 55
ºC
Factor (F3) 1.15 1.00 0.84 0.71 0.59 0.50

Correction factor for DewPoint changes:

DewPoint ºC 3 5 7 10
Factor (F4) 0.91 1.00 1.10 1.26
Dryer Ø [BSP-F] A [mm] By-Pass Code
How to find the air flow capacity: AMD 3 G 3/8” BSP-F 40 2240GBP019
AMD 6-18 G 1/2” BSP-F 210 2240GBP021
Air flow capacity = Nominal duty x Factor (F1) x Factor (F2) x Factor (F3) x Factor (F4) AMD 25 G 1” BSP-F 205 2240GBP022
AMD 32-52 G 1.1/4” BSP-F 205 2240GBP023
Example:
AMD 61-75 G 1.1/2” BSP-F 235 2240GBP024
An AMD 18 has a nominal duty of 1800 l/min. What is the maximum allowable flow through the dryer under
AMD 105-130 G 2” BSP-F 345 2240GBP025
the following operating conditions:
AMD 168 G 2.1/2” BSP-F 410 2240GBP026

BPY0001
– Inlet air pressure = 7 barg – Factor (F1) = 1.00 Ø
– Ambient temperature = 35°C – Factor (F2) = 0.95
– Inlet air temperature = 40°C – Factor (F3) = 0.84
– Pressure DewPoint = 3°C – Factor (F4) = 0.91
In realising the dryer, particular measures have been taken in order to limit the vibration which could occur
Each item of data has a corresponding numerical factor which multiplied by the design air flow is as follows: during the operation. Therefore we recommend to use connecting pipes able to insulate the dryer from
Air flow capacity = 1800 x 1.00 x 0.95 x 0.84 x 0.91 = 1307 l/m in possible vibrations originating from the line (flexible hoses, vibration damping fittings, etc.).
CAUTION:
1307 l/min This is the maximum flow rate that the dryer can accept under these operating conditions. PIPING THE DRYER, INLET/OUTLET CONNECTIONS MUST BE SUPPORTED AS
SHOW IN THE DIAGRAM.
How to select a suitable dryer for a given duty: FAILING WILL RESULT IN DAMAGE
Design air flow
Minimum std. air flow rate =
Factor (F1) x Factor (F2) x Factor (F3) x Factor (F4)
Example:
With the following operating parameters:

– Design air flow = 1100 l/m in

– Inlet air pressure = 7 barg
– Factor (F1) = 1.00
– Ambient temperature = 35°C
– Factor (F2) = 0.95
– Inlet air temperature = 40°C
– Factor (F3) = 0.84
– Pressure DewPoint = 3°C – Factor (F4) = 0.91
In order to select the correct dryer model the required flow rate is to be divided by the correction factors relating
to above mentioned parameters:
1100
Minimum std. air flow rate = = 1515 l/min
1.00 x 0.95 x 0.84 x 0.91
Therefore the model suitable for the conditions above is AMD 18 (1800 l/min - nominal duty).
AMD 3-
3-168 -EN-
EN- -EN-
EN- AMD 3-
3-168

2.7. ELECTRICAL CONNECTIONS 3.2. FIRST START-UP

Qualified personnel should carry out connecting unit to the main power. Be sure to check the local This procedure should be followed on first start-up, after periods of extended shutdown or
codes in your area. following maintenance procedures.
Qualified personnel must perform the start-up.
Before connecting the unit to the electrical supply, verify the data nameplate for the proper electrical
Sequence of operations (refer to paragraph 5.1 Control Panel) :
information. Voltage tolerance is +/- 5%.
AMD 3-75 dryers are supplied with a standard VDE 16A - Shucko power cord and plug assembly (two • Ensure that all the steps of the “Installation” chapter have been observed.
poles and a ground). AMD 105-168 dryers are supplied with a junction box. • Ensure that the connection to the compressed air system is correct and that the piping is suitably fixed
Be sure to provide the proper fuses or breakers based on the data tag information located on the back of and supported.
the unit. The main power receptacle must be protected with a thermal overload/differential relay • Ensure that the condensate drain pipe is properly fastened and connected to a collection system or
(I∆n=0.03A), rated to the power consumption of the dryer (refer to data nameplate for nominal values). The container.
power supply cord must meet or exceed ratings for the total amp draw of the unit. • Ensure that the by-pass system (if installed) is open and the dryer is isolated
• Ensure that the manual valve of the condensate drain circuit is open.
Connect to a properly grounded outlet. Improper connection of the equipment-grounding • Remove any packaging and other material which could obstruct the area around the dryer.
conductor can result in risk of electric shock. • Activate the mains switch.
Do not use adapters on the plug receptacle - if it does not fit the outlet, have a proper outlet • Turn on the main switch - pos. 1 on the control panel.
installed by a qualified electrician. • Ensure that the DMC15 electronic instrument is ON.
• Ensure the consumption matches with the values of the data plate.
2.8. CONDENSATE DRAIN • Ensure the fan work properly - wait for its first interventions.
The condensate is discharge at the system pressure. • Allow the dryer temperature to stabilise at the pre-set value.
Drain line should be secured • Slowly open the air inlet valve.
Never point the condensate drain line towards anybody. • Slowly open the air outlet valve.
The dryer comes with a flexible plastic drain tube. • Slowly close the central by-pass valve of the system (if installed).
The condensate drain occurs through a solenoid valve protected with a mechanical strainer. • Check the piping for air leakage.
The condensate coming from the separator is previously filtered, then discharged. • Ensure the drain is regularly cycling - wait for its first interventions.
The solenoid valve coil is operated by electronic instrument (dryer controller).
If an electronic drainer is installed, the intervention times are determined by the internal capacitive sensor 3.3. START-UP AND SHUT DOWN
(see specific paragraph).
Start-up (refer to paragraph 5.1 Control Panel) :
The drainers cannot be connected to pressurized systems.
• Check the condenser for cleanliness.
Don’t dispose the condensate in the environment. • Verify that the system is powered.
The condensate collected in the dryer contains oil particles released in the air by the compressor. • Turn on the main switch - pos. 1 on the control panel.
Dispose the condensate in compliance with the local rules. • Ensure that DMC15 electronic instrument is ON.
We suggest to install a water-oil separator where to convey all the condensate drain coming from • Wait a few minutes; verify that the DewPoint temperature displayed on DMC15 electronic instrument is
compressors, dryers, tanks, filters, etc. correct and that the condensate is regularly drained.
• Switch on the air compressor.
3. START UP
Shut down (refer to paragraph 5.1 Control Panel) :
3.1. PRELIMINARY OPERATION • Verify that the DewPoint temperature displayed on DMC15 electronic instrument is correct.
Verify that the operating parameters match with the nominal values reported on the data plate of the • Switch OFF the air compressor.
dryer (voltage, frequency, air pressure, air temperature, ambient temperature, etc.). • After a few minutes, switch off the main switch on the control panel of the dryer (pos. 1).

Before delivery, each dryer is submitted to accurate tests simulating real operating conditions. NOTE : A DewPoint included in the green operating area of the electronic controller is correct
Nevertheless, the unit could be damaged during transportation. We therefore suggest to check the integrity according to the possible working conditions (flow-rate, temperature of the incoming air, ambient
of the dryer upon arrival and to keep it under control during the first hours of operation. temperature, etc.)
The start-up must be performed by qualified personnel. During the operation, the refrigerating compressor will run continuously. The dryer must remain on during
It’s mandatory that the engineer in charge adopt safety operational conditions complying with the the full usage period of the compressed air, even if the air compressor works intermittently.
local safety and accident prevention requirements.
The same engineer will be responsible for the proper and safe operation of the dryer. The number of starts must be no more than 6 per hour. The dryer must stop running for at
Never operate the dryer if the panels are not in place. least 5 minutes before being started up again.
The user is responsible for compliance with these rules. Frequent starts may cause
irreparable damage.
 Air-Cooled
AMD MODEL 3 6 9 12 18 25
AMD 3-

1
3-168

Air flow rate at nominal condition [l/min] 350 600 950 1200 1800 2500
3
[m /h] 21 36 57 72 108 150

[scfm] 12 21 34 42 64 88
4.1.

1
Pressure DewPoint at nominal condition [°C] +5 equal to 0.85 g/m3 di H2O
Nominal ambient temperature (max.) [°C] +25 (+45)
Min. ambient temperature [°C] +1
Nominal inlet air temperature (max.) [°C] +35 (+55)
Nominal inlet air pressure [barg] 7
4. TECHNICAL SPECIFICATIONS

Max. inlet air pressure [barg] 16 14

Air pressure drop - p [bar] 0.15 0.04 0.09 0.14 0.32 0.24
Inlet - Outlet connections [BSP-F] G 3/8” G 1/2” G 1”
Refrigerant type R134.a
2
Refrigerant quantity [kg] 0.20 0.22 0.25 0.30 0.33
Cooling air flow 3
[m /h] 200 300
2
Standard Power Supply [Ph/V/Hz] 1/230/50-60

Nominal electric absorption 50Hz (60Hz) [W] 150 (180) 160 (190) 190 (210) 210 (250) 290 (330) 390 (460)

[A] 1.1 (1.1) 1.1 (1.2) 1.3 (1.3) 1.4 (1.5) 1.9 (2.0) 2.4 (2.5)

Max. electric absorption 50Hz (60Hz) [W] 170 (220) 200 (250) 270 (290) 280 (340) 390 (460) 610 (670)

[A] 1.2 (1.3) 1.2 (1.4) 1.5 (1.6) 1.7 (1.8) 2.2 (2.5) 3.3 (3.4)
TECHNICAL SPECIFICATIONS AMD 3-25 230V/50-60 HZ

Max. level noise at 1 m [dbA] < 70

Weight [kg] 21 25 26 28 32 34
1
The nominal condition refers to an ambient temperature of +25°C with inlet air at 7 barg and +35 °C.
EN-
-EN-

2
Check the data shown on the identification plate.

Air-Cooled
AMD MODEL 32 43 52 61 75 105 130 168
EN-
-EN-

1
Air flow rate at nominal condition [l/min] 3200 4300 5200 6100 7500 10500 13000 16800
3
[m /h] 192 258 312 366 450 630 780 1008
[scfm] 113 152 184 216 265 371 459 594
4.2.

1 3
Pressure DewPoint at nominal condition [°C] +5 equal to 0.85 g/m di H2O
Nominal ambient temperature (max.) [°C] +25 (+45)
Min. ambient temperature [°C] +1
Nominal inlet air temperature (max.) [°C] +35 (+55)
Nominal inlet air pressure [barg] 7
Max. inlet air pressure [barg] 14
Air pressure drop - p [bar] 0.16 0.24 0.34 0.19 0.25 0.14 0.20 0.15
Inlet - Outlet connections [BSP-F] G 1.1/4” G 1.1/2” G 2” G 2.1/2”
Refrigerant type R134.a R404A
2
Refrigerant quantity [kg] 0.44 0.40 0.42 0.57 0.70 1.10 1.30 1.90
Cooling air flow 3
[m /h] 350 380 600 400 450 1900
2 [Ph/V/Hz
Standard Power Supply 1/230/50
]
Nominal electric absorption [W] 480 750 930 950 740 940 1550 1590
[A] 2.9 3.3 4.6 4.7 3.6 4.3 7.4 7.5
Max. electric absorption [W] 700 1150 1350 1400 1050 1350 2100 2350
TECHNICAL SPECIFICATIONS AMD 32-168 230V/50HZ

[A] 3.8 5.4 6.6 6.8 4.8 6.3 9.8 11.3

Max. level noise at 1 m [dbA] < 70
Weight [kg] 39 40 41 54 56 94 96 144
1
The nominal condition refers to an ambient temperature of +25°C with inlet air at 7 barg and +35 °C.
AMD 3-

2
Check the data shown on the identification plate.
3-168
 Air-Cooled
AMD MODEL 32E 43E 52E 61E 75E 105E 130E 168E
AMD 3-

1
3-168

Air flow rate at nominal condition [l/min] 3200 4300 5200 6100 7500 10500 13000 16800
3
[m /h] 192 258 312 366 450 630 780 1008
4.3.

[scfm] 113 152 184 216 265 371 459 594

1
Pressure DewPoint at nominal condition [°C] +5 equal to 0.85 g/m3 di H2O
Nominal ambient temperature (max.) [°C] +25 (+45)
Min. ambient temperature [°C] +1
Nominal inlet air temperature (max.) [°C] +35 (+55)
Nominal inlet air pressure [barg] 7
Max. inlet air pressure [barg] 14
Air pressure drop - p [bar] 0.16 0.24 0.34 0.19 0.25 0.14 0.20 0.15
Inlet - Outlet connections [BSP-F] G 1.1/4” G 1.1/2” G 2” G 2.1/2”
Refrigerant type R134.a R404A
2
Refrigerant quantity [kg] 0.44 0.45 0.47 0.68 0.85 1.20 1.40 2.10
Cooling air flow 3
[m /h] 350 380 600 900 2400 2600
2
Standard Power Supply [Ph/V/Hz] 1/230/60
Nominal electric absorption [W] 630 970 1000 1050 910 1150 2070 2250
[A] 3.8 4.4 4.5 4.6 4.1 5.1 9.6 10.3
Max. electric absorption [W] 720 1350 1400 1460 1260 1550 2890 2950
[A] 4.3 5.9 6.2 6.6 5.7 7.2 13.2 14.5
TECHNICAL SPECIFICATIONS AMD 32E-168E 230V/60 HZ

Max. level noise at 1 m [dbA] < 70

Weight [kg] 39 42 45 54 56 94 96 144
1
The nominal condition refers to an ambient temperature of +25°C with inlet air at 7 barg and +35 °C.
EN-
-EN-

2
Check the data shown on the identification plate.

Air-Cooled
AMD MODEL 3P 6P 9P 12P 18P 25P
EN-
-EN-

1
Air flow rate at nominal condition [l/min] 350 600 950 1200 1800 2500
3
[m /h] 21 36 57 72 108 150
[scfm] 12 21 34 42 64 88
4.4.

1 3
Pressure DewPoint at nominal condition [°C] +5 equal to 0.85 g/m di H2O
Nominal ambient temperature (max.) [°C] +25 (+45)
Min. ambient temperature [°C] +1
Nominal inlet air temperature (max.) [°C] +35 (+55)
Nominal inlet air pressure [barg] 7
Max. inlet air pressure [barg] 16 14
Air pressure drop - p [bar] 0.15 0.04 0.09 0.14 0.32 0.24
Inlet - Outlet connections [BSP-F] G 3/8” G 1/2” G 1”
Refrigerant type R134.a
2
Refrigerant quantity [kg] 0.20 0.21 0.22 0.25 0.30 0.33
Cooling air flow 3
[m /h] 200 300
2
Standard Power Supply [Ph/V/Hz] 1/115/60
Nominal electric absorption [W] 180 190 220 280 420 490
[A] 2.2 2.4 2.6 3.0 3.5 5.1
Max. electric absorption [W] 220 240 280 320 460 650
[A] 2.4 2.8 3.1 3.5 3.9 6.0
TECHNICAL SPECIFICATIONS AMD 3P-25P 115V/60 HZ

Max. level noise at 1 m [dbA] < 70

Weight [kg] 21 25 26 28 32 34
1
The nominal condition refers to an ambient temperature of +25°C with inlet air at 7 barg and +35 °C.
AMD 3-

2
Check the data shown on the identification plate.
3-168
AMD 3-
3-168 -EN-
EN- -EN-
EN- AMD 3-
3-168

4.5. CARATTERISTICHE TECNICHE AMD 32P-75P 115V/60 HZ 5. DESCRIZIONE TECNICA

5.1. CONTROL PANEL

The control panel illustrated below is the only dryer-operator interface.
7500

1260
0.25

0.85

11.4
75P

450
265

900

910
8.2

56
AMD 3-61

G 1.1/2”
K
6100

1050

1460
0.19

0.68

13.2
61P

366
216

9.2

54
1
ON DMC15
+5 equal to 0.85 g/m3 di H2O

R404A

600
sec - min

set
1
Air-Cooled

+25 (+45)

+35 (+55)

1/115/60
5200

1000

1400
2 3
0.34

0.47

12.4
< 70
52P

312
184

9.0
+1

14

45
7

AMD 75-168
G 1.1/4”
4300

1350
0.24

0.45

11.8
43P

258
152

380

970
8.8

42
The nominal condition refers to an ambient temperature of +25°C with inlet air at 7 barg and +35 °C.
I K
ON

ON DMC15

sec - min
R134.a
3200

0.16

0.44
32P

192
113

350

630

720
6.5

7.6

39 set

1 2 3
[barg]

[barg]

[bar]

[Ph/V/Hz]

[W]

[A]

[W]

[A]

[dbA]
[°C]

[°C]

[°C]

[°C]
[l/min]

[scfm]

[BSP-F]

[kg]

[kg]
[m /h]

[m /h]

1 Main switch 3 Air and refrigerating gas flow diagram

3

2 Air Dryer Controller DMC15

Check the data shown on the identification plate.

5.2. OPERATION
Operating principal –The dryer models described in this manual operate all on the same principal. The hot
moisture laden air enters an air to air heat exchanger. The air then goes through the evaporator, also known as
AMD MODEL

the air to refrigerant heat exchanger. The temperature of the air is reduced to approximately 2°C, causing water
1

Nominal ambient temperature (max.)

Pressure DewPoint at nominal condition

Nominal inlet air temperature (max.)

vapor to condense to liquid. The liquid is continuously coalesced and collected in the separator for removal by the
1
Air flow rate at nominal condition

condensate drain. The cool moisture free air then passes back through the air to air heat exchanger to be
reheated to within 8 degrees of the incoming air temperature as it exits the dryer.
Nominal electric absorption

Refrigerant circuit - Refrigerant gas is cycled through the compressor and exits at high pressure to a
Min. ambient temperature

Nominal inlet air pressure

Inlet - Outlet connections

Max. electric absorption

Standard Power Supply

Max. level noise at 1 m

p

condenser where heat is removed causing the refrigerant to condense to a high-pressure liquid state. The liquid is
Max. inlet air pressure

2
Refrigerant quantity

forced through a capillary tube where the resulting pressure drop allows the refrigerant to boil off at a predetermined
Air pressure drop -

Refrigerant type

temperature. Low-pressure liquid refrigerant enters the heat exchanger where heat from the incoming air is
Cooling air flow

transferred causing the refrigerant to boil; the resulting phase change produces a low pressure, low temperature
gas. The low-pressure gas is returned to the compressor, where it is re-compressed and begins the cycle again.
Weight

During those periods when the compressed air load is reduced the excess refrigerant is by-passed automatically
back to the compressor via the Hot Gas By-pass Valve circuit.
1

2
AMD 3-
3-168 -EN-
EN- -EN-
EN- AMD 3-
3-168

5.3. FLOW DIAGRAM 5.4. REFRIGERATING COMPRESSOR

The refrigerating compressor is the pump of the system where the gas coming from the evaporator (low
pressure side) is compressed up to the condensation pressure (high pressure side). All the compressors
2 3 4 5 used are manufactured by primary companies and are designed for applications where high compression
PB TS PA PV ratios and wide temperature changes are present.
The fully sealed construction is perfectly gas tight, so ensuring high-energy efficiency and long useful life.
The pumping unit is supported by dumping springs, in order to consistently reduce the acoustic emission
6 and the vibration diffusion. The electric motor is cooled down by the aspirated refrigerating gas, which goes
through the coils before reaching the compression cylinders. The internal thermal protection protects the
compressor from overheating and overcurrents. The protection is automatically restored as soon as the
1a nominal temperature conditions are reached.

5.5. CONDENSER
7
The condenser is the element in which the gas coming from the compressor is cooled down and condensed
1 9 8 becoming a liquid. Mechanically, it is formed by a copper tubing circuit (with the gas flowing inside)
1b immersed in an aluminium blades package.
17 EC M
The cooling operation occurs via a high efficiency axial ventilator which, in applying pressure on the air
contained within the dryer, forces it into the blades package.
12 It’s mandatory that the temperature of the ambient air will not exceed the nominal values. It’s important TO
T1 KEEP THE UNIT FREE FROM DUST AND OTHER IMPURITIES.
12.1
1c 5.6. FILTER DRIER
11 10 T2 Traces of humidity and slag can accumulate inside the refrigerating circuit. Long periods of use can also
produce sludge. This can limit the lubrication efficiency of the compressor and clog the expansion valve or
capillary tube. The function of the Filter Drier, located before the capillary tubing, is to eliminate any
DGF0004

impurities from circulating through the system.

15
5.7. CAPILLARY TUBE
Standard 13 14 16 It consists of a piece of reduced cross section copper tubing located between the capacitor and the
EC
evaporator to form a throttling against the flow of the refrigerating fluid. This throttling creates a pressure
drop, which is a function of the temperature to be reached within the evaporator: the lower the capillary tube
ELD outlet pressure, the lower the evaporation temperature. The length and the diameter of the capillary tubing
21
are accurately sized with the performance to be reached by the dryer; no maintenance/adjustment
Optional operations are necessary.

5.8. ALU-DRY MODULE

The heat exchanger module houses the air-to-air, the air-to-refrigerant heat exchangers and the demister
1 Alu-Dry Module 9 Condenser fan type condensate separator. The counter flow of compressed air in the air-to-air heat exchanger ensures
a - Air-to-air heat exchanger 10 Filter drier maximum heat transfer. The generous cross section of flow channel within the heat exchanger module
b - Air-to-refrigerant exchanger 11 Capillary tube leads to low velocities and reduced power requirements. The generous dimensions of the air-to-refrigerant
c - Condensate separator 12 T1 Temperature probe (DewPoint) heat exchanger plus the counter flow gas flow allows full and complete evaporation of the refrigerant
(preventing liquid return to the compressor). The high efficiency condensate separator is located within the
2 Refrigerant pressure-switch PB(AMD 168) 12.1 T2 Temperature probe (fan control)
heat exchanger module. No maintenance is required and the coalescing effect results in a high degree of
3 Safety thermo-switch TS (AMD 75-168) (AMD 3-32)
moisture separation.
(AMD 43E-168E) - (AMD 43P-168P) 13 Condensate drain isolation valve
4 Refrigerant pressure-switch PA (AMD 105-168) 14 Condensate drain strainer
5 Refrigerant Fan pressure-switch PV 15 Condensate drain solenoid valve
(AMD 43-168) 16 Coil for cond. drain solenoid valve
6 Refrigeration compressor 17 Air Dryer Controller
7 Hot gas by-pass valve …
8 Condenser 21 Electronic level drain

Compressed air flow direction Refrigerating gas flow direction

AMD 3-
3-168 -EN-
EN- -EN-
EN- AMD 3-
3-168

5.9. HOT GAS BY-PASS VALVE 5.12. DMC15 ELECTRONIC INSTRUMENT (AIR DRYER CONTROLLER)
This valve injects part of the hot gas (taken from the discharge side of the compressor) in the pipe between set Button - access the set-up.
the evaporator and the suction side of the compressor, keeping the evaporation temperature/pressure ON DMC15 Button - condensate drain test / value increment.
constant at approx. +2 °C. This injection prevents the formation of ice inside the dryer evaporator at every
Green LED - glowing = power on.
load condition sec - min
Yellow LED - glowing = condensate drain solenoid valve on.
ADJUSTMENT

PQS0014
The hot gas by-pass valve is adjusted during the manufacturing
set Yellow LED - glowing = condenser fan on.
testing phase. As a rule no adjustment is required; anyway if it is A (AMD 3-32)
DISPLAY
necessary the operation must be carried out by an experienced
refrigeration engineer. 4 mm The DMC15 electronic controller performs the following functions : it shows the current operating DewPoint
WARNING : the use of ¼” Schrader service valves must be 5/32 in.
through the digital led display which is detected from the (T1) probe located at the end of the evaporator,
-
justified by a real malfunction of the refrigeration system. Each while a second (T2) probe, located on the discharge side of the condenser, activates the relevant fan;
time a pressure gauge is connected, a part of refrigerant is eventually it controls the functioning of condensate drain solenoid valve through the cyclic electronic timer.

VLY0002
+
exhausted.
Without compressed air flow through the dryer, rotate the adjusting OPERATION - During the dryer operation, the LED is on.
screw (position A on the drawing) until the following value is reached: Thermometer - The 10 LED display indicates the current operating DewPoint, shown by means of a two
Hot gas setting (R134.a) : temperature 0.5 °C (+0.5 / -0 °K) colours (green - red) bar over the display itself.
pressure 2.0 barg (+0.1 / -0 bar) • Green section - operating conditions ensuring an optimal DewPoint;
Hot gas setting (R404A) : temperature 0.5 °C (+0.5 / -0 °K) • Red section - DewPoint of the dryer too high, the dryer is working with elevated thermal load (high inlet
pressure 5.2 barg (+0.1 / -0 bar) air temperature, high ambient temperature, etc.). The treatment of the compressed air may be improper.
Too high DewPoint temperature, value exceeding the upper limit of the instrument range, is indicated by the
intermittent flashing of the last LED; whereas the intermittent flashing of the first LED shows too low
5.10. REFRIGERANT PRESSURE SWITCHES PA- PB- PV DewPoint temperature.
A possible (T1) probe failure is indicated by the intermittent flashing of the first and last LED of the display,
As operation safety and protection of the dryer a series of pressure switches are installed in the gas circuit. whereas the dryer keeps on working correctly.
PB : Low-pressure controller device on the suction side of the compressor, is enabled only if the Thermostat (AMD 3-32) - The fan condenser is activated when the condensate temperature reaches or exceeds
pressure drops below the pre-set value. The values are automatically reset when the nominal 35°C (FANON) - LED on - and it is deactivated when the temperature goes down to 30°C (FANON - Hys) - LED
conditions are restored. off. In case of (T2) probe failure, the fun will run continuously and the LED will intermittent flash.
Calibrated pressure : R 404 A Stop 1.0 barg - Restart 5.0 barg
Timer - The condensate drain solenoid valve is activated for 2 seconds (TON) - LED on - each minute
PA : This high-pressure controller device is located at the pushing side of refrigeration compressor, and (TOFF), if standard setting. To perform the manual test for the condensate drain, press the button.
it is activated when the pressure exceeds the pre-set value. It features a manual-resetting button
SET-UP - The DMC15 is adjusted during the final test of the dryer. In case of particular requirements
mounted on the controller itself.
concerning the operation management, the user can change the setting of the programmed parameters.
Calibrated pressure : R 404 A Stop 32 barg - Manual reset
The parameters which can be set up are the following :
• FANON (AMD 3-32) - activation temperature of condenser fan. It is adjustable inside the following range
PV : Fan control pressure switch is located at the pushing side of refrigeration compressor. It keeps the
of values, with step of 1°K; whereas the Hys hysteresis is fixed and equal to -5ºK.
condensation temperature/pressure constant within preset limits (Air-Cooled).
• TON - activation time of the condensate drain solenoid valve.
Calibrated pressure : R 404 A Start 20 barg (45°C) - Stop 16 barg (36°C) - Tolerance ± 1 bar
• TOFF - pause time between two consecutive activation of the condensate drain solenoid valve.
To access the set-up, keep the button set pressed for at least 2 seconds; LED flashing confirms
5.11. SAFETY THERMO-SWITC TS the command. First appears the (FANON) parameter; to access the other parameters, press sequentially the
To protect the operating safety and the integrity of the dryer, a thermo- set
button. To change the value of the selected parameter, keep the set
button pressed and operate
switch (TS) is installed on the refrigerant gas circuit. The thermo-switch
sensor, in case of unusual discharge temperatures, stops the refrigerating on button ; the current value is shown on the LED display. For the value range and the resolution
2

compressor before it is permanently damaged. (value of each single LED), see the following table :
Set
1
Manually reset the thermo-switch only after the nominal operating Parameter Description Display Value range Resolution
value
conditions have been restored. Unscrew the relative cap (see pos.1 in the (only AMD 3-32) Synchronous flashing
figure) and press the reset button (see pos.2 in the figure). FANON Activation temperature 31 - 40 °C 1°K 35°C
of condenser fan LED + LED
PQS0005

TS setting : temperature 100 °C (+2 / -2 °K) Activation time of the condensate Synchronous flashing
TON 1 - 10 sec 1 sec 2 sec
drain solenoid valve LED + LED
Pause time of the condensate Non-Synchronous flashing
TOFF 1 - 10 min 1 min 1 min
drain solenoid valve LED + LED

To exit the set-up condition in any moment, press the button. If no operations are performed for 2
minutes, the system automatically exits the set-up condition.
AMD 3-
3-168 -EN-
EN- -EN-
EN- AMD 3-
3-168

5.13. ELECTRONIC LEVEL DRAIN 6. MAINTENANCE, TROUBLESHOOTING, SPARES AND DISMANTLING

Instead of the usual drain system (a solenoid valve controlled by means of electronic instrument); an
electronic level controlled drain can be installed as option. This drain consists of a condensate accumulator 6.1. CONTROLS AND MAINTENANCE
where a capacitive sensor continuously checking liquid level is placed: as soon as the accumulator is filled, Only qualified personnel should perform troubleshooting and or maintenance operations.
the sensor passes a signal to the electronic control and a diaphragm solenoid valve will open to discharge
Prior to performing any maintenance or service, be sure that:
the condensate. For a complete condensate discharge the valve opening time will be adjusted exactly for
• no part of the machine is powered and that it cannot be connected to the mains supply.
each single drain operation. No condensate strainers are installed. No adjusting is required. A service valve
is installed before the electronic drain in order to make check and maintenance easily. • no part of the machine is under pressure and that it cannot be connected to the
AT DRYER START-UP VERIFY THAT THIS VALVE IS OPEN. compressed air system.
CONTROL PANEL for Dryers AMD 3-105 • Maintenance personnel have read and understand the safety and operation instructions
The control panel here illustrated allows checking of drain working. in this manual.
Power : LED - drain ready to work / supplied Before attempting any maintenance operation on the dryer, shut it down and wait at least 30
Valve : slow blinking led - membrane solenoid valve open / discharging minutes.
Alarm : fast blinking led - drain in alarm condition Some components can reach high temperature during operation. Avoid contact until system or
Test : button - discharge test (keep pushed for 2 seconds) component has dissipated heat.
CONTROL PANEL FOR DRYERS AMD 3-105
DAILY
The control panel here illustrated allows checking of drain working.
• Verify that the DewPoint displayed on the electronic instrument is correct.
Power : LED - drain ready to work / supplied • Check the proper operation of the condensate drain systems.
Valve : led - membrane solenoid valve open / discharging • Verify the condenser for cleanliness.
Alarm : blinking led - drain in alarm condition
Test : button - discharge test (keep pushed for 2 seconds) EVERY 200 HOURS OR MONTHLY
TROUBLE SHOOTING • With an air jet (max. 2 bar / 30 psig) blowing from inside towards outside
Only qualified personnel should perform troubleshooting and or maintenance operations. clean the condenser; repeat this operation blowing in the opposite way; be
Prior to performing any maintenance or service, be sure that: careful not to damage the aluminium fins of the cooling package.
• no part of the machine is powered and that it cannot be connected to the mains supply.
• no part of the machine is under pressure and that it cannot be connected to the compressed
• Close the isolation valve for the condensate drain, remove the mechanical filter and clean it with
air system.
compressed air and a brush. Reinstall the filter, make sure it is secure, and open the isolation valve.
• Maintenance personnel have read and understand the safety and operation instructions in • At the end, check the operation of the machine.
this manual. EVERY 1000 HOURS OR YEARLY
SYMPTOM POSSIBLE CAUSE - SUGGESTED ACTION • Verify for tightness all the screws of the electric system and that all the “Faston” type
No led lighting up. Verify that the system is powered. connections are in their proper position, inspect unit for broken, cracked or bare wires.
Verify the electric wiring (internal and/or external). • Inspect refrigerating circuit for signs of oil and refrigerant leakage.
Check internal printed circuit board for possible damage. • Measure and record amperage. Verify that readings are within acceptable parameters as listed
Pressing of Test button, The service valve located before the drain is closed - open it. in specification table.
but no condensate The dryer is not under pressure - restore nominal condition. • Inspect condensate drain flexible hoses, and replace if necessary.
discharge. Solenoid valve defective - replace the drain. • At the end, check the operation of the machine.
The internal printed circuit board is damaged - replace the drain.
Condensate discharge The capacitive sensor is too dirty - open the drain and clean the sensor plastic
only when Test button tube.
is pressed.
Drain keeps blowing off The diaphragm valve is dirty - open the drain and clean it.
air. The capacitive sensor is too dirty - open the drain and clean the sensor plastic
tube.
Drain in alarm The capacitive sensor is too dirty - open the drain and clean the sensor plastic
condition. tube.
The service valve located before the drain is closed - open it.
The dryer is not under pressure - restore nominal condition.
Solenoid valve defective - replace the drain.

NOTE : When the drain is in alarm condition, the diaphragm solenoid valve will open 7.5 sec every 4 min.
AMD 3-
3-168 -EN-
EN- -EN-
EN- AMD 3-
3-168

The dryer doesn’t drain The condensate drain service valve is closed - open it.
6.2. TROUBLESHOOTING the condensate. The condensate drain strainer is clogged - remove and clean it.
Only qualified personnel should perform troubleshooting and or maintenance operations. The drain solenoid valve is jammed - remove and clean it.
Prior to performing any maintenance or service, be sure that: Verify the electric wiring.
• no part of the machine is powered and that it cannot be connected to the mains supply. The coil of the condensate drain solenoid valve burned out - replace it.
• no part of the machine is under pressure and that it cannot be connected to the compressed air The DewPoint is too low - the condensate is frozen - see specific point.
system. The DMC15 electronic controller is faulty - replace it.
• Maintenance personnel have read and understand the safety and operation instructions in this
manual. The dryer continuously The drain solenoid valve is jammed - remove and clean it.
drains condensate. Try to remove the electric connector on the solenoid valve - if drain stops verify the
Before attempting any maintenance operation on the dryer, shut it down and wait at least 30 electric wiring or the electronic instrument is faulty - replace it.
minutes.
Water within the line. The dryer doesn't start - see specific point.
Some components can reach high temperature during operation. Avoid contact until system or
Where installed - Untreated air flows through the by-pass unit - close the by-pass.
component has dissipated heat.
The dryer doesn’t drain the condensate - see specific point.
DewPoint too high - see specific point.
SYMPTOM POSSIBLE CAUSE - SUGGESTED ACTION
The dryer doesn't start. Verify that the system is powered. Where installed - The PA Check which of the following has caused the activation :
Verify the electric wiring. high-pressure switch has 1. The ambient temperature is too high or the room aeration is insufficient - provide
been activated. proper ventilation (Air-Cooled).
The compressor doesn’t Activation of the compressor internal thermal protection - wait for 30 minutes, then 2. The condenser is dirty - clean it (Air-Cooled).
work. retry. 3. The condenser fan doesn’t work - see specific point (Air-Cooled).
Verify the electric wiring. Reset the pressure-switch pressing the button on the controller itself - verify the
Where installed- Replace the internal thermal protection and/or the start-up relay dryer for correct operation.
and/or the start-up capacitor and/or the working capacitor. The PA pressure switch is faulty - contact a refrigeration engineer to replace it.
Where installed- The pressure switch PA has been activated - see specific point. Where installed - The PB There is a leak in the refrigerating fluid circuit - contact a refrigeration engineer.
Where installed- The pressure switch PB has been activated - see specific point. low-pressure switch has The pressure switch restores automatically when normal conditions are restored -
Where installed- The safety thermo-switch TS has been activated - see specific been activated. check the proper operation of the dryer.
point.
If the compressor still doesn’t work, replace it. Where installed - The TS Check which of the following has caused the activation :
The fan of the condenser Verify the electric wiring. safety thermo-switch has 1. Eccessive thermal load – restore the standard operating conditions.
been activated. 2. The inlet air is too hot - restore the nominal conditions.
doesn’t work. AMD 3-32 - The DMC15 electronic controller is faulty - replace it.
3. The ambient temperature is too high or the room aeration is insufficient - provide
AMD 43-168 - PV pressure switch is faulty - replace it. proper ventilation.
If the fan still doesn't work, replace it. 4. The condenser unit is dirty - clean it.
DewPoint too low. 5. The fan doesn’t work - see specific point.
AMD 3-32 - The fan is always ON - the yellow LED of DMC15 controller is
6. There is a leak in the refrigerating fluid circuit - contact a refrigeration engineer.
glowing continuously - see specific point.
Reset the thermo-switch by pressing the button on the thermo-switch itself – verify
AMD 43-168 - The fan is always ON - PV pressure switch is faulty - replace it.
the correct operation of the dryer.
Ambient temperature is too low - restore de nominal condition.
The TS thermo-switch is faulty - replace it.
The hot gas by-pass valve is out of setting - contact a refrigeration engineer to
restore the nominal setting. DMC15- The first and the Verify the electric wiring of (T1) DewPoint probe.
last LED of the display of The (T1) DewPoint probe is faulty - replace it.
DewPoint too high. The dryer doesn't start - see specific point. electronic instrument blink The DMC15 electronic controller is faulty - replace it.
The T1 DewPoint probe doesn’t correctly detect the temperature - ensure the simultaneously.
sensor is pushed into the bottom of copper tube immersion well.
The refrigerating compressor doesn’t work - see specific point. DMC15- The yellow AMD 3-32 - Verify the electric wiring of (T2) fan control probe.
The ambient temperature is too high or the room aeration is insufficient - provide LED of the electronic AMD 3-32 - The (T2) fan control probe is faulty - replace it.
proper ventilation. controller is flashing AMD 43-168 – Verify the electric wiring of resistance on terminal 1 and 2.
The inlet air is too hot - restore the nominal conditions. continuously. The DMC15 electronic controller is faulty - replace it.
The inlet air pressure is too low - restore the nominal conditions.
The inlet air flow rate is higher than the rate of the dryer - reduce the flow rate - DMC15- The first LED of DewPoint too low - see specific point.
restore the normal conditions. the display of electronic The (T1) DewPoint probe is faulty - replace it.
The condenser is dirty - clean it. instrument is flashing The DMC15 electronic controller is faulty - replace it.
The condenser fan doesn’t work - see specific point. continuously.
The dryer doesn’t drain the condensate - see specific point.
The hot gas by-pass valve is out of setting - contact a refrigeration engineer to
DMC15- The last LED of DewPoint too high - see specific point.
restore the nominal setting. the display of electronic The (T1) DewPoint probe is faulty - replace it.
There is a leak in the refrigerating fluid circuit - contact a refrigeration engineer. instrument is flashing The DMC15 electronic controller is faulty - replace it.
continuously.
Excessive pressure drop The dryer doesn’t drain the condensate - see specific point.
within the dryer. The DewPoint is too low - the condensate is frost and blocks the air - see specific
point.
Check for throttling the flexible connection hoses.
 AMD/230V/50-60Hz AMD/230V/50Hz
N. DESCRIPTION OF THE SPARE PARTS CODE 3 6 9 12 18 25 32 43 52 61 75 105 130 168
2 Refrigerant gas pressure switch PB 5655NNN085 1 1 1

NOTE :
AMD 3-

3 TS safety thermo-switch 56141NN005 1 1 1 1

4 Fan pressure switch PA 5655NNN087 1
3-168

5 Fan pressure switch PV 5655NNN170 1 1 1 1 1 1 1

6 Compressor 5015110101 1 1
6 Compressor 5015110104 1
6 Compressor 5015110107 1
6 Compressor 5015110113 1
6 Compressor 5015110115 1
6 Compressor 5015110016 1
6 Compressor 5025116105 1
identification plate.

6 Compressor 5025116010 1 1
6 Compressor 5030116010 1
6 Compressor 5030116015 1
6 Compressor 5030115025 1 1
7 Hot Gas By-pass Valve 64140SS155 1 1 1 1 1 1 1
7 Hot Gas By-pass Valve 64140SS160 1 1 1 1 1 1 1
9 Complete fan 5250110055 1
9 Complete fan 5250110071 1 1 1
6.3.

9.1 Fan motor 5210110005 1 1 1

9.1 Fan motor 5210110011 1 1 1
9.1 Fan motor 5210110017 1
9.1 Fan motor 5210110022 1
9.1
worked out by a refrigerating systems specialist or in our factory.

Fan motor 5210110025 1 1

9.2 Fan blade 5215000010 1 1 1
9.2 Fan blade 5215000019 1 1 1
9.2 Fan blade 5215000023 1 1
9.2 Fan blade 5215000025 1
9.2 Fan blade 5215000033 1
SPARE PARTS

9.3 Fan grid 5225000010 1 1 1 1 1

9.3 Fan grid 5225000027 1 1
10 Filter Drier 6650SSS007 1 1 1 1 1 1 1
10 Filter Drier 6650SSN150 1 1
10 Filter Drier 6650SSN160 1 1 1 1 1
12 DewPoint probe . DMC15 (T1) 5625NNN035 2 2 2 2 2 2 2 1 1 1 1 1 1 1
13+14 Condensate drain valve/strainer 64355MN012 1 1 1 1 1 1 1 1 1
14 Condensate Y strainer 64355FF011 1 1 1 1 1
15 Condensate drain solenoid valve 64320FF080 1 1 1 1 1 1 1
15 Condensate drain solenoid valve 64320FF081
15 Condensate drain solenoid valve 64320FF082 1 1 1 1 1 1 1
16 Coil for cond. drain solenoid valve 64N22MM001 1 1 1 1 1 1 1
16 Coil for cond. drain solenoid valve 64N22MM002
16 Coil for cond. drain solenoid valve 64N22MM003 1 1 1 1 1 1 1
17 Air Dryer Controller DMC15 5620110104 1 1 1 1 1 1 1 1 1 1 1 1 1 1
21 Electronic drain 2210BEK001A 1 1 1 1 1 1 1 1 1 1 1 1
21 Electronic drain 2210BEK002A 1 1
EN-
-EN-

22 Main switch 2P 0/1 5450SZN010 1 1 1 1 1 1 1 1 1 1

22 Main switch 5450SZN117 1 1 1 1
The suggested spare parts list will enable you to promptly intervene in case of abnormal operation, so avoiding to wait
for the spares delivery. In case of failure of other parts, for example inside the refrigerating circuit, the replacement must be

To order the suggested spare parts or any other part, it’s necessary to quote the data reported on the

Suggested spare part.

AMD/230V/60Hz
N. DESCRIPTION OF THE SPARE PARTS CODE 32E 43E 52E 61E 75E 105E 130E 168E
2 Refrigerant gas pressure switch PB 5655NNN085 1 1 1
EN-
-EN-

3 Safety thermo-switch TS 56141NN005 1 1 1 1 1 1 1

4 Fan pressure switch PA 5655NNN087 1
5 Fan pressure switch PV 5655NNN170 1 1 1 1 1 1 1
6 Compressor 5015115011 1
6 Compressor 5030115005 1 1 1
6 Compressor 5030115015 1 1
6 Compressor 5030115025 1 1
7 Hot Gas By-pass Valve 64140SS155 1 1 1 1 1 1 1
9 Complete fan 5250110055 1
9 Complete fan 5250110100 1 1
9 Complete fan 5250115005 1
9.1 Fan motor 5210110017 1
9.1 Fan motor 5210110025 1
9.1 Fan motor 5210110018 1
9.1 Fan motor 5210110022 1
9.2 Fan blade 5215000022 1 1
9.2 Fan blade 5215000025 1
9.2 Fan blade 5215000032 1
9.3 Fan grid 5225000010 1 1
9.3 Fan grid 5225000027 1 1
10 Filter Drier 6650SSS007 1
10 Filter Drier 6650SSN150 1 1
10 Filter Drier 6650SSN160 1 1 1 1 1
12 DewPoint probe . DMC15 (T1-T2) 5625NNN035 2 1 1 1 1 1 1 1
13+14 Condensate drain valve/strainer 64355MN012 1 1 1
14 Condensate Y strainer 64355FF011 1 1 1 1 1
15 Condensate drain solenoid valve 64320FF080 1
15 Condensate drain solenoid valve 64320FF082 1 1 1 1 1 1 1
16 Coil for cond. drain solenoid valve 64N22MM001 1
16 Coil for cond. drain solenoid valve 64N22MM003 1 1 1 1 1 1 1
17 Air Dryer Controller DMC15 5620110104 1 1 1 1 1 1 1 1
21 Electronic drain 2210BEK001A 1 1 1 1 1 1
21 Electronic drain 2210BEK002A 1 1
22 Main switch 5450SZN010 1 1 1
AMD 3-

22 Main switch 5450SZN117 1 1 1 1 1

3-168

Suggested spare part.

AMD 3-
3-168 -EN-
EN- -EN-
EN- AMD 3-
3-168

6.4. MAINTENANCE OPERATION ON THE REFRIGERATING CIRCUIT

75P
1
1

1
1

1
1

1
1
Maintenance and service on refrigerating systems must be carried out only by certified
refrigerating engineers only, according to local rules.
All the refrigerant of the system must be recovered for its recycling, reclamation or destruction.
61P
1
1

1
1

1
DO NOT DISPOSE THE REFRIGERANT FLUID IN THE ENVIROMENT.

1
1
This dryer comes ready to operate and filled with R134a or R404A type refrigerant fluid.
52P

In case of refrigerant leak contact a certified refrigerating engineers. Room is to be aired before
1
1

1
1

1
1

1
1
any intervention.
If is required to re-fill the refrigerating circuit, contact a certified refrigerating engineers.
Refer to the dryer nameplate for refrigerant type and quantity.
43P
1
1

1
1

1
1

1
1
Characteristics of refrigerants used:
Refrigerant Chemical formula TLV GWP
R134a - HFC CH2FCF3 1000 ppm 1300
32P

1
1
2

1
R404A - HFC CH2FCF3/C2HF5/C2H3F3 1000 ppm 3784
AMD/115V/60Hz

6.5. DISMANTLING OF THE DRYER

25P

1
1
If the dryer is to be dismantled, it has to be split into homogeneous groups of materials.

1
Part Material
Refrigerant fluid R404A, R134a, Oil
18P

1
1
Canopy and Supports Carbon steel, Epoxy paint

1
Refrigerating compressor Steel, Copper, Aluminium, Oil
Alu-Dry Module Aluminium
12P

Condenser Unit Aluminium, Copper, Carbon steel

1

1
1
2

1
Pipe Copper
Fan Aluminium, Copper, Steel
Valve Brass, Steel
9P

1
1
Electronic Level Drain PVC, Aluminium, Steel
2

1
Insulation Material Synthetic gum without CFC, Polystyrene, Polyurethane
Electric cable Copper, PVC
Electric Parts PVC, Copper, Brass
6P

1
1
2

1
We recommend to comply with the safety rules in force for the disposal of each type of material.
The chilling fluid contains droplets of lubrication oil released by the refrigerating compressor.
3P

1
1
Do not dispose this fluid in the environment. Is has to be discharged from the dryer with a suitable
2

device and then delivered to a collection centre where it will be processed to make it reusable.
2210BEK001P
64N22MM002
64N22MM004
5655NNN170

5625NNN035
64355MN012
6650SSN150
6650SSN160
56141NN005

6650SSS007

5450SZN010
5450SZN117
64140SS160
64140SS155

64355FF011
64320FF081
64320FF083
5015135101
5015135103
5015135105
5015135007
5015135010
5015135011
5030135005
5030135015

5250135001
5210135005
5210135010
5210135015
5210135020
5210135021
5215000010
5215000019
5215000022
5215000025
5215000032
5225000010
5225000027

5620130104
CODE
DESCRIPTION OF THE SPARE PARTS

Coil for cond. drain solenoid valve

Coil for cond. drain solenoid valve
Condensate drain solenoid valve
Condensate drain solenoid valve
13+14 Condensate drain valve/strainer
DewPoint probe . DMC15 (T1)

Air Dryer Controller DMC15

Safety thermo-switch TS

Hot Gas By-pass Valve

Hot Gas By-pass Valve
Fan pressure switch PV

Condensate Y strainer

Suggested spare part.

Main switch2P 0/1
Electronic drain
Complete fan
Compressor
Compressor
Compressor
Compressor
Compressor
Compressor
Compressor
Compressor

Main switch
Filter Drier
Filter Drier
Filter Drier
9.1 Fan motor
9.1 Fan motor
9.1 Fan motor
9.1 Fan motor
9.1 Fan motor
9.2 Fan blade
9.2 Fan blade
9.2 Fan blade
9.2 Fan blade
9.2 Fan blade
9.3 Fan grid
9.3 Fan grid
N.

10
10
10
12

14
15
15
16
16
17
21
22
22
3
5
6
6
6
6
6
6
6
6
8
8
9
AMD 3-
3-168 -EN-
EN- -EN-
EN- AMD 3-
3-168

7. LIST OF ATTACHMENTS 7.3. ELECTIC DIAGRAMS

7.3.1 Electrical Diagram of DryersAMD 3-32
7.1. DRYERS DIMENSIONS 7.3.2 Electrical Diagram of DryersAMD 43-61
7.1.1 Dryers Dimensions AMD 3 7.3.3 Electrical Diagram of DryersAMD 43E-61E / 43P-61P
7.1.2 Dryers Dimensions AMD 6-18 7.3.4 Electrical Diagram of DryersAMD 75 / 75E /75P
7.1.3 Dryers Dimensions AMD 25 7.3.5 Electrical Diagram of DryersAMD 105-130
7.1.4 Dryers Dimensions AMD 32-52 7.3.6 Electrical Diagram of DryersAMD 168
7.1.5 Dryers Dimensions AMD 61-75 Electrical Diagram table of components
7.1.6 Dryers Dimensions AMD 105-130 IG : Main switch
7.1.7 Dryers Dimensions AMD 168 K : Refrigerating compressor
KT : Compressor thermal protection
7.2. EXPLODED VIEW KR : Compressor starting relay (if installed)
7.2.1 Exploded view of DryersAMD 3 / 3E / 3P CS : Compressor starting capacitor (if installed)
7.2.2 Exploded view of DryersAMD 6-18 / 6E-18E / 6P-18P CR : Compressor run capacitor (if installed)
7.2.3 Exploded view of DryersAMD 25-32 / 25E-32E / 25P-32P V : Condenser fan
7.2.4 Exploded view of DryersAMD 43 CV : Fan starting capacitor (if installed)
7.2.5 Exploded view of DryersAMD 43E / 43P DMC15 : DMC15 Electronic Instrument - Air Dryer Controller
7.2.6 Exploded view of DryersAMD 52 T1 : T1 Temperature probe (DewPoint)
T2 : T2 Temperature probe (Fan control)
7.2.7 Exploded view of DryersAMD 52E / 52P
PV : Pressure switch - Fan control
7.2.8 Exploded view of DryersAMD 61
PA : Pressure switch - Compressor discharge side - high-pressure
7.2.9 Exploded view of DryersAMD 61E / 61P
PB : Pressure switch - Compressor suction side - low-pressure
7.2.10 Exploded view of DryersAMD 75 / 75E / 75P TS : TS safety thermo-switch
7.2.11 Exploded view of DryersAMD 105-130 / 105E-130E BOX : Electric box
7.2.12 Exploded view of DryersAMD 168 / 168E EVD : Condensate drain solenoid valve
Exploded view table of components - Dryers AMD 3-168 ELD : Electronic level drain
1 Alu-Dry Module 16 Coil for cond. drain solenoid valve BN = BROWN
1.1 Insulation Material 17 Electronic control instrument BU = BLUE
BK = BLACK
2 Refrigerant pressure-switch PB … YG = YELLOW/GREEN
3 TS safety thermo-switch 21 Electronic level drain
4 Refrigerant pressure-switch PA 22 Main switch
5 Refrigerant pressure-switch (fan) PV …
6 Refrigerating compressor 51 Front panel
7 Hot gas by-pass valve 52 Back panel
8 Condenser 53 Right lateral panel
9 Condenser fan 54 Left lateral panel
9.1 Motor 55 Cover
9.2 Blade 56 Base plate
9.3 Grid 57 Upper plate
10 Dehydration filter 58 Support beam
11 Capillary tube 59 Support bracket
12 T1 Temperature probe (DewPoint) 60 Control panel
13 Condensate drain service valve 61 Electric connector
14 Y-shaped condensate drain strainer 62 Electric box
15 Condensate drain solenoid valve …
81 Flow diagram sticker