3 Hot gas bypass valve
The hot gas bypass 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 of the evaporator at about 1-2 ° C. This injection prevents the formation of ice
in the evaporator of the dryer under any load conditions. You can set it under no-load conditions
(you have to close it to reduce the temperature on the controller to approximately 1-2 °C). To do this
the cap has to be unscrewed and then the valve turned in direction of “-”according to the image
below. Please give it some time (10 - 20 min) before finishing the setting. A good initial rotation
would be 180 °.
Below you see a schematic of a bypass valve.
2: RDP 20 - 480
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