FRIULAIR ACT VC 3000 - 6000 User manual

Refrigerating air dryer
Air –water cooled
EN - User’s maintenance and spare parts manual
74MD0008A8-EN_00

2 –EN ACT VS 3000 - 6000
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 ACT VS 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.
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.

ACT VS 3000 - 6000 EN - 3
Contents
1Safety instructions 5
2Safety pictograms in accordance with DIN 4844 6
2.1 Signal words in accordance with ANSI 7
2.2 Overview of the safety instructions 8
3Proper use of the dryer 10
4Exclusion from a field of application 10
5Instructions for the use of pressure equipment according to PED directive 2014/68/EU 10
6Transport 11
7Storage 11
8Installation 12
8.1 Place of installation 12
8.2 Installation layout 13
8.3 Correction factors 14
8.4 Connection to the compressed air system 15
8.5 Electrical connections 16
8.6 Connection to the cooling water network (Water-Cooled) 17
8.7 Minimum cooling water requirements: 17
8.8 Condensate drain 17
9Start-up 18
9.1 Preliminary operation 18
9.2 First start-up 18
9.3 Start-up and shut down 19
10 Technical data 20
10.1 Technical data 3000 –6000 20
11 Technical description 21
11.1 Control panel 21
11.2 Operation 21
11.3 Flow diagram (Air-Cooled) 22
11.4 Flow diagram (Water-Cooled) 22
11.5 Refrigerating compressor 23
11.6 Condenser (Air-Cooled) 23
11.7 Condenser (Water-Cooled) 23
11.8 Condenser water regulating valve (Water-Cooled) 23
11.9 Filter dryer 23
11.10 Electronic Expansion Valve (EEV) 24
11.11 Alu-Dry module 24
11.12 Refrigerant pressure switches LPS –HPS 24
11.13 Compressor crankcase heater 24
11.14 Electrical panel fan 24
11.15 DMC50 electronic control unit 25
11.15.1 Starting the dryer (“ON” mode) 25
11.15.2 Stopping the dryer (“STANDBY” mode) 25
11.15.3 Performing the condensation drain test 25
11.15.4 Displaying process values T1, T2, T3, T4, HP, LP, % , % 26
11.15.5 How the DMC50 control unit displays and processes a service warning 27
11.15.6 How the DMC50 control unit displays and processes an alarm 28
11.15.7 Displaying the log file of stored alarms 30
11.15.8 Downloading the process values stored following an alarm 31
11.15.9 Displaying instantaneous process values for the compressor variable speed drive 31
11.15.10 Displaying technical maintenance and energy savings data 32
11.15.11 Controlling the dryer from a remote workstation 33
11.15.12 How the alarm / service warning flagging contact operates 33
11.15.13 How the RS485 serial communication port operates 33
11.15.14 Displaying / changing process user parameters 34
11.15.15 Changing the system date / time 36
11.15.16 Changing the user interface language 36
11.16 Electronic drainer 37

4 –EN ACT VS 3000 - 6000
12 Maintenance, troubleshooting, spare parts and dismantling 38
12.1 Checks and maintenance 38
12.2 Troubleshooting 39
12.3 Spare parts 48
13 Maintenance operation on the refrigeration circuit 49
13.1 Dismantling of the dryer 49
14 Attachments 50
Exploded views –List of components 50
Electric diagrams –List of components 50
14.1 Dryers dimension 51
14.1.1 ACT VS 3000 - 3750 51
14.1.2 ACT VS 4000 - 5000 51
14.1.3 ACT VS 6000 Air-Cooled 51
14.1.4 ACT VS 6000 Water-Cooled 51
14.2 Exploded views 51
14.2.1 ACT VS 3000 –3750 Air-Cooled 51
14.2.2 ACT VS 3000 –3750 Water-Cooled 51
14.2.3 ACT VS 4000 –5000 Air-Cooled 51
14.2.4 ACT VS 4000 –5000 Water-Cooled 51
14.2.5 ACT VS 6000 Air-Cooled 51
14.2.6 ACT VS 6000 Water Cooled 51
14.3 Electric diagrams 51
14.3.1 ACT VS 3000 - 3750 51
14.3.2 ACT VS 4000 51
14.3.3 ACT VS 5000 51
14.3.4 ACT VS 6000 51

Safety instructions
ACT VS 3000 - 6000 EN - 5
1 Safety instructions
Please check whether or not these instructions correspond to the device type.
Please adhere to all advice given in these operating instructions. They include essential information
which must be observed during installation, operation and maintenance. Therefore, it must be ensured
that these operating instructions are read by the fitter and the responsible operator / certified skilled
personnel prior to installation, start-up and maintenance.
The operating instructions must be accessible at all times at the place of application of the compressed-
air refrigeration dryer.
In addition to these operating instructions, local and national regulations need to be observed, where
required.
Ensure that operation of the compressed-air refrigeration dryer only takes place within the permissible
limit values indicated on the name plate. Any deviation from these limit values involves a risk for
persons and for the material, and may result in malfunction or a breakdown.
After installing the device correctly and in accordance with the instructions in this manual, the dryer is
ready to operate, further settings are not required. Operation is fully automatic and maintenance is
limited to several examinations and cleaning measures which are described in the following chapters.
This manual must be available at all times for future reference and is a constituent part of the dryer.
If you have any queries regarding these installation and operating instructions, please contact
manufacturer.

Safety pictograms in accordance with DIN 4844
6 –EN ACT VS 3000 - 6000
2 Safety pictograms in accordance with DIN 4844
Observe operating instructions
General danger symbol
Supply voltage
Danger: component or system under pressure
Hot surfaces
Non-breathable air
Do not use water to extinguish the fire
Do not operate with open cover (housing)
Maintenance works or controlling measures must only be carried out by qualified personnel 1
Do not smoke
Note
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6
ARIA
AIR
LUFT
AIR
Connection point compressed-air inlet
ARIA
AIR
LUFT
AIR
Connection point compressed-air outlet
Connection point condensate drain
Connection point cooling-water inlet (water-cooled)
Connection point cooling-water outlet (water-cooled)
1
Certified skilled personnel are persons who are authorised by the manufacturer, with experience and technical training, who are
well-grounded in the respective provisions and laws and capable of carrying out the required works and of identifying and avoiding
any risks during the machine transport, installation, operation and maintenance.
Qualified and authorised operators are persons who are instructed by the manufacturer regarding the handling of the refrigeration
system, with experience and technical training, and who are well-grounded in the respective provisions and law.

Safety pictograms in accordance with DIN 4844
ACT VS 3000 - 6000 EN - 7
Works can be carried out by the operator of the plant, provided that they are skilled accordingly 2.
NOTE: Text that contains important specifications to be considered –does not refer to safety precautions.
The device was carefully designed with particular attention paid to environmental protection:
•CFC-free refrigerants
•CFC-free insulation material
•Energy-saving design
•Limited acoustic emissions
•Dryer and packaging comprise reusable materials
This symbol advises the user to observe the environmental aspects and comply with the recommendations
connected with this symbol.
2.1 Signal words in accordance with ANSI
Danger!
Imminent hazard
Consequences of non-observance: serious injury or death
Warning!
Potential hazard
Consequences of non-observance: possible serious injury or death
Caution!
Imminent hazard
Consequences of non-observance: possible injury or property damage
Notice!
Potential hazard
Consequences of non-observance: possible injury or property damage
Important!
Additional advice, info, hints
Consequences of non-observance: disadvantages during operation and maintenance, no danger
2
Certified skilled personnel are persons who are authorised by the manufacturer, with experience and technical training, who are
well-grounded in the respective provisions and laws and capable of carrying out the required works and of identifying and avoiding
any risks during the machine transport, installation, operation and maintenance.
Qualified and authorised operators are persons who are instructed by the manufacturer regarding the handling of the refrigeration
system, with experience and technical training, and who are well-grounded in the respective provisions and laws.

Safety pictograms in accordance with DIN 4844
8 –EN ACT VS 3000 - 6000
2.2 Overview of the safety instructions
Certified skilled personnel
Installation works must exclusively be carried out by authorised and qualified skilled personnel. Prior to
undertaking any measures on the compressed-air refrigeration dryer, the certified skilled personnel shall
read up on the device by carefully studying the operating instructions. The operator is responsible for the
adherence to these provisions. The respective directives in force apply to the qualification and expertise
of the certified skilled personnel.
For safe operation, the device must only be installed and operated in accordance with the indications in
the operating instructions. In addition, the national and operational statutory provisions and safety
regulations, as well as the accident prevention regulations required for the respective case of
application, need to be observed during employment. This applies accordingly when accessories are
used.
Danger!
Compressed air!
Risk of serious injury or death through contact with quickly or suddenly escaping compressed
air or through bursting and/or unsecured plant components.
Compressed air is a highly dangerous energy source.
Never work on the dryer when the system is under pressure.
Never direct the compressed-air outlet or condensate drain hoses at persons.
The user is responsible for the proper installation of the dryer. Non-observance of the instructions in the
"Installation" chapter leads to the expiration of the guarantee. Improper installation may result in
dangerous situations for the personnel and/or the device.
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Danger!
Supply voltage!
Contact with non-insulated parts carrying supply voltage involves the risk of an electric shock
resulting in injuries and death.
Only qualified and skilled personnel are authorised to run electrically-operated devices. Prior to
undertaking maintenance measures at the device, the following requirements must be met:
Make sure that the power supply is switched off and that the device is off and marked for maintenance
measures. Please also ensure that the power supply cannot be re-established during the works.
Prior to carrying out maintenance works at the dryer, switch it off main switch (control panel pos.1) and
wait for at least 30 minutes.
Caution!
Refrigerant!
The compressed-air refrigeration dryer uses HFC-containing refrigerants as a coolant.
Please observe the corresponding paragraph entitled "Maintenance works at the refrigeration cycle".
Warning!
Refrigerant leak!
A refrigerant leak involves the danger of serious injury and damage to the environment.
Caution!
Hot surfaces!
During operation, several components can reach surface temperatures of more than +60°C (140°F).
There is the risk of burns.
All components concerned are installed inside of the closed housing. The housing must only be opened
by certified skilled personnel 3.
3
Certified skilled personnel are persons who are authorised by the manufacturer, with experience and technical training, who are
well-grounded in the respective provisions and laws and capable of carrying out the required works and of identifying and avoiding
any risks during the machine transport, installation, operation and maintenance.

Safety pictograms in accordance with DIN 4844
ACT VS 3000 - 6000 EN - 9
Caution!
Improper use!
The device is intended for the separation of water in compressed air. The dried compressed air cannot
be used for breathing-air purposes and is not suitable for the direct contact with food.
This dryer is not suitable for the treatment of contaminated air or of air containing solids.
NOTE!
Contaminated intake air!
In the event that the intake air is strongly contaminated (ISO 8573.1 class 3.-3 or poorer quality), we
recommend the additional installation of a prefilter (5 micron minimum), to avoid clogging of the heat
exchanger.
Caution!
Heating-up through fire!
In the event of a heating-up through fire, the containers and pipes of the refrigerant system can
burst.
In this case, please proceed as follows:
Switch off the refrigeration plant.
Switch off the mechanical ventilation of the machinery compartment.
Use ambient-air-independent respirators.
Containers and plants which are filled with refrigerant can burst violently in the event of fire.
The refrigerants themselves are incombustible, but they are degraded to very toxic products at high
temperatures.
Remove the container/plant from the fire zone, as there is the risk of bursting!
Cool down containers and bottles via a directed water jet from a safe position.
In the event of fire, please use an approved fire extinguisher. Water is not a suitable agent to extinguish
an electrical fire.
This must only be carried out by persons who are trained and informed about the hazards emanating
from the product.
Caution!
Unauthorised intervention!
Unauthorised interventions may endanger persons and plants and lead to malfunction.
Unauthorised interventions, modification and abuse of the pressure devices are prohibited.
The removal of sealings and leadings at safety devices is prohibited.
Operators of the devices must observe the local and national pressure equipment regulations in the
country of installation.
Note!
Ambient conditions!
In the event that the dryer is not installed under suitable ambient conditions, the ability of the device to
condense refrigerant gas is impaired. This can result in a higher load of the refrigerating compressor,
and in a loss of efficiency and performance of the dryer.
This in turn leads to overheated condenser fan motors, to malfunction of electric components and to a
breakdown of the dryer. Failures of this type will affect warranty considerations.
Do not install the dryer in an environment in which chemicals with a corrosive effect, explosive gases,
toxic gases, evaporation heat, high ambient temperatures or extreme dust and dirt can be found.
Qualified and authorised operators are persons who are instructed by the manufacturer regarding the handling of the refrigeration
system, with experience and technical training, and who are well-grounded in the respective provisions and laws.

Proper use of the dryer
10 –EN ACT VS 3000 - 6000
3 Proper use of the dryer
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.
The Manufacturer will not be responsible for any problem arising from improper use; the user will bear responsibility for
any resulting damage.
Moreover, the correct use requires the adherence to the installation instructions, specifically:
•Voltage and frequency of the main power.
•Pressure, temperature and flow-rate of the inlet air.
•Pressure, temperature and cooling water capacity (Water-Cooled).
•Ambient temperature.
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.
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4 Exclusion from a field of application
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Note!
Improper use!
The device is intended for the separation of water in compressed air. The dried compressed air
cannot be used for breathing-air purposes and is not suitable for the direct contact with food.
This dryer is not suitable for the treatment of contaminated air or of air containing solids.
5 Instructions for the use of pressure equipment according to PED directive 2014/68/EU
To ensure the safe operation of pressure equipments, the user must conform strictly to the above directive and the
following:
1. The equipment must only be operated within the temperature and pressure limits stated on the manufacturer’s
data nameplate.
2. Welding on heat-exchanger is not recommended.
3. The equipment must not be stored in badly ventilated spaces, near a heat source or inflammable substances.
4. Vibration must be eliminated from the equipment to prevent fatigue failure.
5. Automatic condensate drains should be checked for operation every day to prevent a build up of condensate in
the pressure equipment.
6. The maximum working pressure stated on the manufacturer’s data nameplate must not be exceeded. Prior to
use, the user must fit safety / pressure relief devices.
7. All documentation supplied with the equipment (manual, declaration of conformity etc.) must be kept for future
reference.
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
FORBIDDEN. Users of the equipment must comply with all local and national pressure equipment
legislation in the country of installation.

Transport
ACT VS 3000 - 6000 EN - 11
6 Transport
Check for visible loss or damage, if no visible damage is found place the unit near to the installation point and unpack
the contents.
•To move the packaged unit we recommend using a suitable trolley or forklift truck. Hand carrying is not
recommended
•Always keep the dryer in the upright vertical position. Damage to components could result if unit is laid on its side
or if placed upside down.
•Handle with care. Heavy blows could cause irreparable damage.
7 Storage
SCC0001
Even when packaged, keep the machine protected
from severity of the weather.
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 temperature of
+1°C … +50°C (34°F…122°F), and a specific humidity
not exceeding 90%. Should the stocking time exceed
12 months, please contact the manufacturer.
The packaging materials are recyclable. Dispose of material in compliance with the rules and
regulations in force in the destination country.

Installation
12 –EN ACT VS 3000 - 6000
8 Installation
8.1 Place of installation
Note!
Ambient conditions!
In the event that the dryer is not installed under suitable ambient conditions, the ability of the device to
condense refrigerant gas is impaired. This can result in a higher load of the refrigerating compressor, and
in a loss of efficiency and performance of the dryer.
This in turn leads to overheated condenser fan motors, to malfunction of electric components and to a
breakdown of the dryer. Failures of this type will affect warranty considerations.
Do not install the dryer in an environment in which chemicals with a corrosive effect, explosive gases,
toxic gases, evaporation heat, high ambient temperatures or extreme dust and dirt can be found.
Minimum installation requirements:
•Choose an area which is clean and dry, free from dust and protected against atmospheric disturbances.
•The load-bearing zone must be even, horizontal and able to bear the weight of the dryer.
•Minimum ambient temperature +1°C (34°F).
•Maximum ambient temperature +45°C (113°F).
•Ensure a proper cooling air replacement.
•Allow a sufficient clearance on each side of the dryer for proper ventilation and to facilitate maintenance operations.
The dryer does not require attachment to the floor surface.
Do not obstruct the ventilation grille (not even partially).
Prevent any recirculation of the outgoing cooling air.
Protect the dryer against draughts.

Installation
ACT VS 3000 - 6000 EN - 13
8.2 Installation layout
1
Air compressor
2
Aftercooler
3
Condensate separator
4
Pre-Filter (min. 5 micron)
5
By-pass group
6
Dryer
7
Compressed air tank
8
Final filter
9
Condensate drain
Dryer’s compressor and fan (air cooled) speed are adjusted to adapt power consumption to the dryer load. Although
system is quite reactive, it cannot adapt its setting immediately to sudden load variation leading to dewpoint
spikes/fluctuations.
To avoid this behaviour it is recommended to install the dryer in systems where load variations happens but are
damped. Compressed air receivers can be used as dampers: installed before the dryer if compressors capacity varies
suddenly and frequently, after the dryer if the air consumption variation is very wide, frequent and sudden or both to
have the best load variation dampness.
Compressed air tanks can be installed as capacity dampers: installed before the dryer (Type A) if the compressor
capacity varies suddenly and often, after the dryer (Type B) if the change in air consumption is very large, frequent
and sudden or both to have the improved dampening of the flow variation.
Do not obstruct the ventilation grille (not even partially).
Prevent any recirculation of the outgoing cooling air.
Protect the dryer against draughts.
NOTE!
Contaminated intake air!
In the event that the intake air is strongly contaminated (ISO 8573.1 class 3.-3 or poorer quality), we
recommend the additional installation of a prefilter (5 micron minimum), to avoid clogging of the heat
exchanger.

Installation
14 –EN ACT VS 3000 - 6000
8.3 Correction factors
Correction factor for operating pressure changes:
Inlet air pressure psig
60
80
100
120
140
160
180
203
barg
4
5.5
7
8
10
11
12
14
Factor (F1)
0.79
0.91
1.00
1.07
1.13
1.18
1.23
1.27
Correction factor for ambient temperature changes (Air-Cooled):
Ambient temperature ºF
80
90
95
100
105
110
115
ºC
27
32
35
38
40
43
45
Factor (F2)
1.11
1.09
1.06
1.00
0.94
0.87
0.78
Correction factor for inlet air temperature changes:
Air temperature ºF
90
100
110
122
130
140
150
158
ºC
32
38
43
50
55
60
65
70
Factor (F3)
1.16
1.00
0.82
0.68
0.61
0.52
0.45
0.40
Correction factor for DewPoint changes:
DewPoint ºF
38
41
45
50
ºC
3
5
7
10
Factor (F4)
1.00
1.08
1.20
1.36
How to find the air flow capacity:
Air flow capacity = Nominal duty x Factor (F1) x Factor (F2) x Factor (F3) x Factor (F4)
Example:
An ACT VS 3000 has a nominal duty of 3000 scfm (5097 m³/h). What is the maximum allowable flow through the
dryer under the following operating conditions:
Inlet air pressure = 120 psig (8 barg)
Ambient temperature = 115°F (45°C)
Inlet air temperature = 122°F (50°C)
Pressure DewPoint = 50°F (10°C)
Factor (F1) = 1.07
Factor (F2) = 0.78
Factor (F3) = 0.68
Factor (F4) = 1.36
Each item of data has a corresponding numerical factor which multiplied by the design air flow is as follows:
Air flow capacity = 3000 x 1.07 x 0.78 x 0.68 x 1.36 = 2316 scfm (3935 m³/h)
2316 scfm (3935 m³/h) This is the maximum flow rate that the dryer can accept under these operating conditions.
How to select a suitable dryer for a given duty:
Minimum std. air flow rate =
Design air flow
Factor (F1) x Factor (F2) x Factor (F3) x Factor (F4)
Example:
With the following operating parameters:
Design air flow = 3500 scfm (1274 m3/h)
Inlet air pressure = 120 psig (8 barg)
Ambient temperature = 115°F (45°C)
Inlet air temperature = 122°F (50°C)
Pressure DewPoint = 50°F (10°C)
Factor (F1) = 1.07
Factor (F2) = 0.78
Factor (F3) = 0.68
Factor (F4) = 1.36
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:
Minimum std. air flow rate =
3500
= 4535 scfm (7705 m³/h)
1.07 x 0.78 x 0.68 x 1.36
Therefore the model suitable for the conditions above is ACT VS 5000 (5000 scfm [8490 m³/h] - nominal duty).

Installation
ACT VS 3000 - 6000 EN - 15
8.4 Connection to the compressed air system
DANGER!
Compressed air!
All works must only be carried out by qualified skilled personnel.
Never work on compressed-air systems which are under pressure.
The operator or the user must ensure that the dryer is never operated with a pressure exceeding the
maximum pressure value indicated on the name plate.
Exceeding the maximum operating pressure can be dangerous for the operator but also for the device.
The air temperature and the flow entering the dryer must comply within the limits stated on the data nameplate. The
system connecting piping must be kept free from dust, rust, chips and other impurities, and must be consistent with the
flow-rate of the dryer. In case of treatment of air at particularly high temperature, the installation of a final refrigerator
could result necessary. In order to perform maintenance operations, it is recommended to install a dryer by-pass
system. In realising the dryer, particular measures have been taken in order to limit the vibration which could occur
during the operation. Therefore we recommend to use connecting pipes able to insulate the dryer from possible
vibrations originating from the line (flexible hoses, vibration damping fittings, etc.).
NOTE!
Contaminated intake air!
In the event that the intake air is strongly contaminated (ISO 8573.1 class 3.-3) or poorer quality, we
recommend the additional installation of a prefilter (5 micron minimum), to avoid clogging of the heat
exchanger.

Installation
16 –EN ACT VS 3000 - 6000
8.5 Electrical connections
Danger!
Supply voltage!
The connection to the electric mains should only be carried out by qualified skilled personnel and must
correspond to the legal provisions in force in your region.
Prior to connecting the device, please check the name plate to avoid exceeding the indicated values. The voltage
tolerance is +/- 10%.
The installer is responsible for supplying and installing the power cable. Be sure to provide the proper fuses or
breakers based on the data information located on the nameplate.
A residual-current device (RCD) with In =0.3A Class B is suggested. The cross section of the power supply cables
must comply with the consumption of the dryer, while keeping into account also the ambient temperature, the
conditions of the mains installation, the length of the cables, and the requirements enforced by the local Power
Provider.
CAUTION!
Please observe the direction of rotation of the fix speed compressors!
In this system, the direction of rotation of the fix speed compressors is supervised by a reverse-
phase protector (RPP).
When this guard is triggered, the DMC50 goes into alarm mode (the status bar flashes red and shows
alarm n.5 “Compressor Protection”). In the event that the compressor does not run, the direction of
rotation must be changed by interchanging two phases. These modifications must only be carried out by
a qualified electrician.
Do not by-pass the RPP protector: If the device is operated with the incorrect direction of
rotation, the compressor will fail immediately. This will void the guarantee.
Danger!
Supply voltage and missing earth connection!
Important: ensure that the plant is connected to earth.
Do not use plug adapters at the power plug.
Possible replacement of the power plug must only be carried out by a qualified electrician.
Note!
This dryer is not suitable for employment on IT-systems.
This dryer is not suitable for employment on grounded-delta systems

Installation
ACT VS 3000 - 6000 EN - 17
8.6 Connection to the cooling water network (Water-Cooled)
DANGER!
Compressed air!
All works must only be carried out by qualified skilled personnel.
Never work on compressed-air systems which are under pressure.
The operator or the user must ensure that the dryer is never operated with a pressure exceeding the
maximum pressure value indicated on the name plate.
Exceeding the maximum operating pressure can be dangerous for the operator but also for the device.
The temperature and the amount of cooling water must comply with the limits indicated on the technical characteristics
chart. The cross section of the connection pipes, preferably flexible, must be free from rust, chips and other impurities.
We recommend to use connecting pipes able to insulate the dryer from possible vibrations originating from the line
(flexible hoses, vibration damping fittings, etc.).
NOTE!
Contaminated intake water!
In the event that the intake water is strongly contaminated we recommend the additional installation of a
prefilter (500 micron), to avoid clogging of the heat exchanger.
8.7 Minimum cooling water requirements:
Temperature
15 … 30°C (1)
HCO3 / SO4
>1.0 mg/l or ppm
Pressure
3…10 barg (2)
NH3
<2 mg/l or ppm
Head pressure
> 3 bar (2) (3)
Cl-
<50 mg/l or ppm
Total hardness
6.0…15 °dH
Cl2
<0.5 mg/l or ppm
PH
7.5…9.0
H2S
<0.05 mg/l or ppm
Conductivity
10…500 μS/cm or μmho/cm
CO2
<5 mg/l or ppm
Residual solid particles
<30 mg/l or ppm
NO3
<100 mg/l or ppm
Saturation Index SI
-0.2 < 0 < 0.2
Fe
<0.2 mg/l or ppm
HCO3
70…300 mg/l or ppm
Al
<0.2 mg/l or ppm
SO42-
<70 mg/l or ppm
Mn
<0.1 mg/l or ppm
Note : (1) –Other temperature on request - Check the data shown on the identification plate.
(2) –Other pressure on request - Check the data shown on the identification plate.
(3) –Pressure difference at dryer water connection points at maximum water flow - Other head pressure on
request.
CAUTION!
During the piping of the dryer, the inlet and outlet connections need to be supported as is shown in the
illustration.
Non-observance will cause damage.
8.8 Condensate drain
Danger!
Compressed air and condensate under pressure!
The condensate is discharged at system pressure.
The drain pipe needs to be secured.
Never direct the condensate drain pipe at persons.
The dryer comes already fitted with an electronic condensate drainer.
Connect and properly fasten the condensate drain to a collecting plant or container.
The drain cannot be connected to pressurized systems.
Don’t dispose the condensate in the environment.
The condensate collected in the dryer contains oil particles released in the air by the compressor.
Dispose the condensate in compliance with the local rules.
We recommend to install a water-oil separator where to convey all the condensate drain coming from
compressors, dryers, tanks, filters, etc.

Start-up
18 –EN ACT VS 3000 - 6000
9 Start-up
9.1 Preliminary operation
Note!
Exceeding of the operating parameters!
Ensure that the operating parameters comply with the nominal values indicated on the name plate of the
dryer (voltage, frequency, air pressure, air temperature, ambient temperature etc.).
This dryer has been thoroughly tested, packaged and inspected prior to shipment. Nevertheless, the unit could be
damaged during transportation, check the integrity of the dryer during first start-up and monitor operation during the
first hours of operation.
The initial start-up must be carried out by qualified personnel.
During the installation and operation of this device, all national regulations regarding electronics and any
other federal and state ordinances, as well as local provisions, need to be adhered to.
The operator and the user must ensure that the dryer is not operated without panels.
9.2 First start-up
The method below should be applied during the first start-up, after longer downtimes or subsequent to
maintenance works.
The start-up must be carried out by certified skilled personnel.
Sequence of operations (refer to section 10.1 Control Panel).
•Ensure that all the steps of the “Installation” chapter have been observed.
•Ensure that the connection to the compressed air system is correct and that the piping is suitably fixed and
supported.
•Ensure that the condensate drain pipe is properly fastened and connected to a collection system or container.
•Ensure that the by-pass system (if installed) is closed and the dryer is isolated.
•Ensure that the manual valve of the condensate drain circuit is open.
•Remove any packaging and other material which could obstruct the area around the dryer.
•Activate the mains switch.
•Turn on the main switch - pos. 1 on the control panel.
•Wait about 45 seconds the initialization of the electronic controller DMC50.
•Select the desired language and the current date and time (see sections 10.15.15 and 10.15.16)
•Wait at least two hours before starting the dryer (compressor crankcase heater must heat the oil of the compressor).
•Keep pressed the button at least 3 seconds, the dryer starts and the display shows (ON).
•If the temperature shown on the display is sufficiently high, verify that the refrigerating compressor starts within a few
minutes. NOTE! –With low temperatures, the refrigerating compressor will remain OFF.
•NOTE! –if the dryer doesn’t start and the DMC50 shows the alarm n.5 (Compressor Protection), power
phases are not connected properly. Change two of the three phases at the supply mains (see Section 7.6).
•Ensure the cooling water flow and temperature is adequate (Water-Cooled).
•Ensure the effective operation of the fan, watching its speed percentage on the display (Air-Cooled).
•Allow the dryer temperature to stabilise at the pre-set value.
•Slowly open the air inlet valve.
•Slowly open the air outlet valve.
•Slowly close the central by-pass valve of the system (if installed).
•Check the piping for air leakage.
•Ensure the drain is regularly cycling - wait for its first interventions.

Start-up
ACT VS 3000 - 6000 EN - 19
CAUTION!
Please observe the direction of rotation of the fix speed compressors!
In this system, the direction of rotation of the fix speed compressors is supervised by a reverse-
phase protector (RPP).
When this guard is triggered, the DMC50 goes into alarm mode (the status bar flashes red and shows
alarm n.5 “Compressor Protection”). In the event that the compressor does not run, the direction of rotation
must be changed by interchanging two phases. These modifications must only be carried out by a qualified
electrician.
Do not by-pass the RPP protector: If the device is operated with the incorrect direction of rotation,
the compressor will fail immediately. This will void the guarantee.
9.3 Start-up and shut down
During short-term shut down (max. two to three days), it is advisable to leave the dryer and the control
panel connected to the supply current circuit. Otherwise, it would be necessary at a restart of the dryer to
wait two hours, until the oil in the compressor has reached the specified operating temperature.
Start-up (refer to section 10.1 Control Panel)
•Check the condenser for cleanliness (Air-Cooled).
•Ensure the fan filter of electrical panel is clean.
•Ensure the cooling water flow and temperature is adequate (Water-Cooled).
•The display of electronic controller shows (STANDBY).
•Keep pressed the button at least 3 seconds, the dryer starts and the display shows (ON).
•If the temperature shown on the display is sufficiently high, verify that the refrigerating compressor starts within a few
minutes.
•NOTE! –With low temperatures, the refrigerating compressor will remain OFF.
•Wait few minutes; verify that the DewPoint temperature displayed on electronic controller is correct and that the
condensate is regularly drained.
•Switch on the air compressor.
Shut down (refer to section 10.1 Control Panel)
•Check that the DewPoint temperature displayed on electronic controller is within range.
•Shut down the air compressor.
•Keep pressed the button at least 3 seconds, the dryer stops and the display shows (STANDBY).
Dryer remote control ON-OFF
•See instructions on section 10.15.11
Note!
A dew point between 0°C and +10°C (34°F and 50°F) displayed on the electronic controller is considered
to be correct according to the possible operating conditions (flow rate, air inlet temperature, ambient
temperature etc.).
The electronic controller DMC50 adjusts compressor and fan(s) speed according to thermal load applied to the dryer.
At very low or no load conditions, compressor is switched ON and OFF by the DMC50 to keep the temperature of the
heat exchanger cold, allowing a consistent additional energy saving.
The dryer must remain (ON) during the full usage period of the compressed air, even if the air compressor
works intermittently.

Technical data
20 –EN ACT VS 3000 - 6000
10 Technical data
10.1 Technical data 3000 –6000
MODEL ACT VS 3000-UR 3750-UR 4000-UR 5000-UR 6000-UR
[scfm] 3000 3750 4000 5000 6000
Air flow rate at nominal condition (1) [m3/h] 5094 6367,5 6792 8490 10188
[l/min] 84900 106125 113200 141500 169800
Pressure DewPoint at nominal condition(1) [°F (°C)] Nominal ambient temperature [°F (°C)] Min...Maxambient temperature [°F (°C)] Nominal inlet air temperature [°F (°C)] Nominal inlet air pressure [psig (barg)] Max. inlet air pressure [psig (barg)] Air pressure drop - ∆p [psi (bar)] 2.8 (0.19) 3.8 (0.26) 2.8 (0.19) 4.1 (0.28) 3.2 (0.22) Inlet - Outlet connections [FL ANSI] Refrigerant type Refrigerant quantity(2) [oz(kg)] 370 (10.50) 476 (13.50) 494 (14.00) 688 (19.50) 988 (28.00) Cooling air fan flow [cfm (m3/h)] 12710 (21600) 13070 (22200) 16950 (28800) 17420 (29600) 26130 (44400) Heat Rejection [btu/hr (kW)] 155700 (45.6) 193000 (56.5) 212800 (62.3) 249000 (72.9) 303900 (88.1) Standard Power Supply(2) [Ph/V/Hz]
[kW] 11,20 13,80 15,40 17,10 22,30
[A] 13,8 17,2 18,1 22,3 28,7
FullLoad Amperage FLA [A] 25,1 29,8 34,3 38,0 41,6 Max. noise level at 1 m [dbA] Weight [lb (kg)] 1850 (840) 2090 (950) 2350 (1065) 2670 (1210) 3660 (1660) Refrigerant type Refrigerant quantity(2) [oz(kg)] 332 (9.40) 430 (12.20) 448 (12.70) 617 (17.50) 776 (22.00) Max. cooling water inlet temp (3) [°F (°C)] Min...Max. cooling water inlet pressure [psig (barg)] Cooling waterflow at 30°C [US gpm (m3/h)] 12.5 (2.84) 15.5 (3.51) 17.4 (3.95) 19.5 (4.42) 25.6 (5.82) Heat Rejection [btu/hr (kW)] 155700 (45.6) 193000 (56.5) 212800 (62.3) 249000 (72.9) 303900 (88.1) Control of cooling water flow Cooling water connection [NPT-F] Standard Power Supply(2) [Ph/V/Hz]
[kW] 7,30 8,90 10,10 10,90 12,70
[A] 8,5 10,1 10,9 13,2 15,9
FullLoad Amperage FLA [A] 19,4 24,1 26,8 30,5 35,9 Max. noise level at 1 m [dbA] Weight [lb (kg)] 1720 (780) 2090 (950) 2350 (1065) 2670 (1210) 3220 (1460)
(1) The nominal condition refers to an ambient temperature of 100°F (38°C) with inlet air at 100 psig (7 barg) and 100°F (38°C). (2) Check the data shown on the identification plate. (3) Other temperature on request.
Water-Cooled
Air-Cooled
Nominal electric consumption
Nominal electric consumption
45…145 (3…10)
Automatic by valve
100 (38) max.158 (70)
100 (7)
203 (14)
< 75
< 80
38 (3)
100 (38)
34…115 (1…45)
8" # 150
6" # 150
R407C
R407C
< 80
< 85
1.1/2"
2"
3/460/60
86 (30)
3/460/60