APPENDIX B : COMPRESSOR DRIVEN AIRDRYER
B--28 20950 Issue 1 April 98
Cabinet Fan Replacement
WARNING: The airdryer must be switched off and power
removed.
The door must be open.
Pull off the power connections from the fan and remove the
earth/ground connection.
Remove the four screws securing the external shroud to the cabinet.
Lift the shroud, complete with fan, away from the dryer cabinet.
Remove the four screws holding the fan, finger guard andshroud asa
single assembly, replace the fan with a new unit and re--assemble.
Refit the shroud onto the cabinet and reconnect the wiring to the fan.
Pressure Switch Replacement
WARNING: The airdryer must be switched off and power
removed.
The door must be open.
Removethetwofixingscrewsandpulltheswitchforward. Removethe
wiringconnectionsandthetubefromtheswitchandremovetheswitch
from the cabinet. Re--assembly, with a new switch, is the reverse
procedure.
Humidity Sensor Replacement
WARNING: The airdryer must be switched off and power
removed.
The door must be open.
DisconnectthewiringfromthePCBandcarefullyremovethehumidity
sensor from the cabinet wall. To fit a new sensor, attach the sensor to
the cabinet wall using the adhesive pad and connect the wiring to the
PCB. Be careful to place the sensor in the air flow from the sampling
tube.
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