Technical data
ACT VS 3000 - 6000
EN - 23
11.5 Refrigerating compressor
The refrigerating compressor is the pump of the system, gas coming from the evaporator (low pressure side) is
compressed up to the condensation pressure (high pressure side). Dryer is equipped with multiple compressors, of
which one in variable speed.
Variable speed compressor
It is used a scroll fully hermetic compressor encapsulated with a BLDC (Brush Less Direct Current) motor which is the
latest and most efficient technology available for this application. Compressor motor speed is completely handled by an
heavy duty variable speed drive, with a customized software capable to ensure a very wide capacity regulation.
Compressor motor protection is completely managed by the variable speed driver.
FIX speed compressor
It is used a scroll fully hermetic compressor encapsulated with an AC motor. Compressor is activated ON/OFF
according to the thermal load. The integrated safeguard protects the compressor against overheating and excess
current. The protection is automatically reset as soon as the nominal conditions are reached again.
11.6 Condenser (Air-Cooled)
The condenser is the component in which the gas coming from the compressor is cooled down and condensed
becoming a liquid. Mechanically, a serpentine copper tubing circuit (with the gas flowing inside) is encapsulated in an
aluminium fin package.
3000-5000 VS: The cooling operation occurs via a high efficiency fan(s) AC motor, creating airflow within the dryer,
moving air through the fin package. The fan(s) motor speed is completely handled by an heavy duty driver, with a
customized software capable to ensure a very wide capacity regulation.
6000 VS: The cooling operation occurs via a high efficiency fan(s) DC motor with integrated driver, creating airflow
within the dryer, moving air through the fin package. The fan(s) motor speed is completely handled by the fan
integrated driver capable to ensure a very wide capacity regulation.
It’s mandatory that the ambient air temperature does not exceed the nominal values. It is also important to keep the
condenser unit free from dust and other impurities.
11.7 Condenser (Water-Cooled)
The condenser is the component in which the gas coming from the compressor is cooled down and condensed
becoming a liquid. Basically it is a water/refrigerating gas exchanger where the cooling water lowers the temperature of
the refrigerating gas.
The temperature of the inlet water must not exceed the nominal values. It must also guarantee an adequate flow and
that the water entering the exchanger is free from dust and other impurities.
11.8 Condenser water regulating valve (Water-Cooled)
The condenser water regulating valve is used to keep the condensing pressure/temperature constant when the Water-
Cooled is being used. Thanks to the capillary tube, the valve detects the pressure in the condenser and consequently
adjusts the water flow. When the dryer stops the valve automatically closes the cooling water flow.
The condenser water regulating valve is an operating control device.
The closure of the water circuit from the pressure condenser water regulating valve cannot be used as a
safety closure during service operations on the system.
ADJUSTMENT
The condenser water regulating valve is adjusted during the testing phase to a pre-set value that covers 90%
of the applications. However, sometimes the extreme operating conditions of the dryer may require a more
accurate calibration.
During start-up, a qualified technician should check the condensing pressure/temperature and if necessary
adjust the valve by using the screws on the valve itself.
To increase the condensing temperature, turn the adjusting screws counter-clockwise; to lower it turn the
screws clock-wise.
Water valve setting : R407C pressure 15 barg (± 0.5 bar) / 218 psig (± 7 psi)
11.9 Filter dryer
Traces of humidity and slag can accumulate inside the refrigerant circuit. Long periods of use can also produce sludge.
This can limit the lubrication efficiency of the compressor and clog the expansion valve. The function of the filter drier,
located before the expansion valve, is to eliminate any impurities from circulating through the system.
Содержание ACT VC 3000 - 6000
Страница 52: ...Attachments 52 EN ACT VS 3000 6000 ...
Страница 53: ...Attachments ACT VS 3000 6000 EN 53 ...