desmon GBF-7 - Replacing the Pressure Switch

Blast chiller Service Manual
45 Rev 07/04/2015
b) Remove door switch mounting screws.
c) Disconnect the switch wires from terminals 48 & 49 on the main control.
d) Remove the switch.
e) Reinstall new switch by reversing the above steps.
4.7 REPLACING THE PRESSURE SWITCH
Occasionally the pressure switch can fail or become blocked and an “hP” alarm will be
displayed even though the pressures are good.
a) To replace the pressure switch, the capillary tubes must be disconnected.
b) The high pressure capillary tube is connected to the liquid receiver upper tap.
c) Before removing the capillary tube connections, the tap must be closed to prevent
refrigerant loss.
d) On the low pressure side, there is a self-closing ¼” SAE Schroeder connector.
BOLT/NUT
SWITCH
CABLES
HIGH PRESSURE
CONNECTION
(SELF CLOSING)
TAP
S
CHROEDER
¼” SAE
FOR LOW
PRESSURE CONNECTION
LIQUID RECEIVER