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Monthly Maintenance
For air-cooled condensers, inspect the condenser coils.
Remove dust, dirt or other particles with a soft brush or
with compressed air from an OSHA-approved air nozzle
that limits its discharge pressure to 30 psig. If the coils are
coated with oil, grease or other substances that reduce the
cooling efficiency, clean the coils with a solvent. Follow the
solvent manufacturer’s directions for proper use and dis-
posal, including the use of proper protective equipment.
Automatic Drain Valve Disassembly and
Servicing
The drain valve discharges condensate through a 7/8-inch
diameter port. Cleaning may be required under conditions
of gross particulate contamination. To disassemble the drain
valve for cleaning or other maintenance:
1.
Turn power switch off.
2.
Disconnect main power supply to dryer.
3.
Lock out and tag power supply in accordance with
OSHA requirements.
WARNING
If power supply is not disconnected before disas-
sembly, serious personal injury and valve damage
may result.
4.
Remove screw and washer from front of valve.
5.
Remove the power supply connector and gasket from
the solenoid coil housing. Do not damage or lose the
gasket.
6.
Remove 13mm nut and spring washer from top of so-
lenoid coil housing.
7.
Lift solenoid coil housing off solenoid core in valve body.
8.
Unscrew solenoid core from valve body. Once the valve
is disassembled, the following maintenance can be per-
formed.
9.
Inspect diaphragm; clean or replace as required.
10. Remove debris from valve body.
11. Wipe solenoid core components with a clean cloth or
blow out debris with compressed air from an OSHA-
approved air nozzle that limits its discharge pressure
to 30 psig.
12. Check that small port in diaphragm assembly is clear
and solenoid coil moves freely in housing. Viton seals
are compatible with commonly used synthetic lubri-
cants.
CAUTION
Do not disassemble timer or attempt to repair elec-
trical parts. Replace timer if defective.
To reassemble the valve, reverse the sequence of the pre-
ceding steps. After the valve is reassembled, connect the
main power supply to the dryer. When the dryer is returned
Figure 4
Automatic Drain Valve Components
VALVE BODY
SOLENOID COIL
HOUSING
SPRING WASHER
13mm NUT
CORE HOUSING
O-RING
SOLENOID CORE
SPRING
BRASS
RUBBER
VALVE BODY
ARROW INDICATES
FLOW DIRECTION
DIAPHRAGM
ASSEMBLY
SOLENOID COIL
ASSEMBLY
SCREW
WASHER
CONNECTOR WITH
POWER CORD
GASKET
