Refrigerating Compressor; Condenser (Air-Cooled); Condenser (Water-Cooled); Cooling-Water Regulating Valve - Beko DRYPOINT RA eco 7200 Instructions For Installation And Operation Manual

Technical description
8.5

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 inverter, with a customized software capable to ensure a very wide capacity regulation. Compressor motor
protection is completely managed by the inverter
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.
8.6

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.
RA 5400-8800: 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 inverter, with a
customized software capable to ensure a very wide capacity regulation.
RA 10800: The cooling operation occurs via a high efficiency fan(s) DC motor with integrated inverter, creating airflow
within the dryer, moving air through the fin package. The fan(s) motor speed is completely handled by the fan integrated
inverter 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.
8.7

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.
8.8

Cooling-water regulating valve

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 :
8.9

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.
14
R134.a pressure 10 barg (± 0.5 bar)
R407C pressure 16 barg (± 0.5 bar)
DRYPOINT® RA 5400-10800 eco