OMEGA AIR RDP Series, Installation And Operating Manual

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5.5 Expansion valves
This valve injects a portion of the hot gases (taken
from the compressor outlet) into the tube between
the evaporator and the suction side of the
compressor, thereby maintaining a constant
temperature / pressure of the evaporator at about +2
° C. This injection prevents the fo rmation of ice in the
evaporator of the dryer under any load conditions.
SETTING
The hot gas bypass valve is factory set during the test
phase. As a rule, no additional settings are needed, but
if an intervention is required, an experienced cooler
technology engineer should do this.
The screw needs to be adjusted without the load on
the dryer. Rotate the screw until the following value is
reached:
Hot gas setting: R134.a pressure 2.0 barg ( ± 0.1 bar)
5.6. Electronic condensate drain
The separator consists of a condensate reservoir in which the capacitive sensor continuously checks
the level of the liquid. As soon as the tank is filled, the sensor sends the electronic board a signal and
the membrane solenoid valve opens and releases the condensate from the system. For a complete
drainage of the condensate, the valve opening time must be set precisely for each individual
condensate outlet. The impurity catcher is not built in. No settings required.
Electronic
board
Power LED Lit - the separator is ready to operate
Alarm LED
Flashing - the condensate drain is in alarm
state
TEST button Drainage test (press button for 2 seconds)
Figure 3: Bypass valve
Figure 4: Thermal expansion valve