VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
3.To check boiler fill valve:
A.Verify 120VAC to solenoid valve coil.
B.If voltage is correct but valve is not opening (little or no water flow), turn power switch off and disconnect power to machine.
1)Remove lead wires from coil and check for continuity.
2)If no continuity is measured, install a replacement solenoid valve and check for proper operation.
3)If continuity is measured, the coil is good.
C.If voltage is not correct, check main water level control board as outlined under
WATER LEVEL CONTROLS TEST.
4.To check cold water condenser valve:
NOTE: Valve should energize only during cooking cycles and at boiler blowdown/drain.
A.Verify 120VAC to solenoid valve coil.
B.If voltage is correct but valve is not opening (little or no water flow), turn power switch off and disconnect power to machine.
1)Remove lead wires from coil and check for continuity.
2)If no continuity is measured, install a replacement solenoid valve and check for proper operation.
3)If continuity is measured, the coil is good. Continue with procedure for additional valve checks.
C.If voltage is not correct, check cold water condenser thermostat as outlined under
COLD WATER CONDENSER THERMOSTAT ADJUSTMENT.
5.To check valve ports for clogs or valve component malfunction, continue with procedure for disassembly and inspection of internal components.
6.Turn water supply off, disconnect water line from valve body then remove solenoid valve.
7.Remove coil assembly from valve stem
8.Secure the valve body to keep it from turning.
9.Scribe a line on stem nut to valve body for proper
10.All parts are now accessible for inspection and cleaning.
NOTE: If internal solenoid parts appear to be damaged or worn, then replace the solenoid valve. Do not reuse damaged or worn parts. No internal solenoid parts are available as a service replacement.
A.Check rubber seal on bottom of plunger.
B.Check plunger spring.
C.Check
D.Check ports in valve body.
11.Reverse procedure to install and check for proper operation.
COLD WATER CONDENSER THERMOSTAT ADJUSTMENT
During a cooking cycle or boiler blowdown/drain, the cold water condenser thermostat (N.O.) should close and energize the cold water condenser solenoid valve. The water from spray nozzle mixes with the drain water in the condenser drain box to reduce drain water temperature and condense steam vapors.
If excessive steam vapors are seen exiting the drain, adjust the cold water condenser thermostat as outlined below.
1.Turn power switch off and allow boiler to blowdown/drain.
2.Access cold water condenser thermostat as outlined under PRESSURE SWITCH CONTROL BOX COMPONENTS in REMOVAL AND REPLACEMENT OF PARTS.
3.Turn thermostat shaft fully counterclockwise to energize the cold water condenser solenoid valve.
A.Allow cold water to flow until condenser drain box has completely cooled.
B.Slowly turn thermostat shaft clockwise until thermostat opens and
4.Check for proper operation.
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| F25154 (February 2004) |
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