VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
B.Verify Low Water light is lit (front control panel).
C.Verify 120VAC is on Aux LLCO COM, and 0 volt is on Aux LLCO N.O. contacts.
9.When water level reaches Aux LLCO probe as boiler continues to fill:
A.Verify Aux LLCO LED is lit on the auxiliary low water board.
B.Verify the green ready light is lit (front control panel).
C.Verify 120VAC is on the Aux LLCO common and normally open contacts of the auxiliary water level control board.
10.Open the ball valve on probe housing assembly. This will allow boiler to drain.
11.When water level is no longer visible in sight glass and is below LLCO probe; Aux LLCO circuit should activate.
A.Low water light turns on (front control panel).
B.Aux LLCO led turns off on the auxiliary low water board.
C.Press reset switch to verify lockout condition. Low water light should remain on.
D.If lockout condition does not occur, immediately turn power switch off.
1)Disconnect power to machine.
2)Replace auxiliary low level
E.If lockout condition is ok, verify the auxiliary water level control circuit is functioning properly.
F.Close the ball valve on probe housing assembly and allow boiler to fill.
1)Verify low water light turns off (front control panel).
2)Press the reset switch and verify auxiliary contactors A & C are energized and boiler is heating.
3.Press reset switch and verify high pressure light turns off.
4.When green ready light comes on, press reset switch to begin heating (low water light turns off).
A.Allow boiler to fully pressurize. Cycling pressure switch opens and heating stops.
5.Turn one cooking compartment timer on to exhaust steam from boiler.
6.Monitor boiler pressure gauge for two complete cycles. Note pressure at which the heat comes on and goes off.
The heat should come on at 10 PSI and go off at 12 PSI.
A.If pressure readings differ, continue with procedure to adjust.
7.Two pressure adjustment screws extend through the top of switch cover. A clockwise rotation increases pressure; a counter- clockwise rotation decreases pressure.
A.Turn the adjustment screw above right side pointer to obtain the proper
B.Turn the adjustment screw above the left side pointer to obtain the proper
NOTE: The screw directly above the right side pointer adjusts
8.Monitor boiler pressure gauge for two complete cycles and note the pressure at which the heat comes on and goes off.
A.If pressures are correct, pressure switch is properly adjusted.
B.If pressures are not correct, repeat the adjustment for up to three attempts.
9.If the above adjustment cannot be obtained, install a replacement pressure switch and adjust pressure settings as outlined in this procedure.
CYCLING PRESSURE SWITCH
ADJUSTMENT
1.Access cycling pressure switch as outlined under PRESSURE SWITCH CONTROL BOX COMPONENTS in REMOVAL AND REPLACEMENT OF PARTS.
2.Turn power switch on (boiler begins to fill).
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| F25154 (February 2004) |
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