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4 - 6 Maintenance and Repair
WARNING!
Ensure that the Dryer is de-energized, valve isolated,
and fully depressurized before attempting to remove
or disassemble any Dryer component or subassem-
bly. Failure to do so may result in serious personal
injury and/or equipment damage.
3. Remove hose that connects the drain valve to the fil-
ter.
4. Remove screw and washer from front of drain valve.
5. Remove the power supply connector and gasket (with
the timer assembly, if attached) from the solenoid
coil housing. Do not damage or lose the gasket.
6. Remove 13 mm nut and spring washer from top of
solenoid coil housing.
7. Lift solenoid coil housing off solenoid core in valve
body.
8. Unscrew solenoid core from valve body.
Once the drain valve is disassembled, the following mainte-
nance can be performed:
1. Inspect diaphragm, clean or replace as required.
2. Remove debris from the valve body.
3. Wipe solenoid core components with a clean cloth or
blow out debris with compressed air from an OSHA
approved air nozzle that limits the discharge pressure
to 30 psig.
4. Check the small port in diaphragm assembly is clear
and solenoid coil moves freely in housing. Viton dia-
phragm seals are compatible with commonly used
synthetic lubricants.
5. If timer is attached to valve body, check electrical
continuity across timer assembly.