Vulcan-Hart ML-52163, Руководство по обслуживанию

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• Boiler pressurizes to 15 PSI, causing
the high limit pressure switch to open.
At that time, the auxiliary heating
element contactors are de-energized,
shutting off power to the heating
elements. The pressure switch will
remain open until the pressure drops
below the lower limit set point of 6 PSI
and the manual reset switch is
pressed.
• Boiler water level drops below the
LLCO probes for the water level and
the auxiliary LLCO controls which de-
energizes the LLCO relays and
changes the contact state of LLCO-2
(N.O.) back to open. This de-energize
the main and auxiliary heating element
contactors, shutting off power to the
heating elements. The heating
elements will remain off until the water
level rises above the LLCO probes and
the manual re-set switch is pressed.
Cook Cycle
1. A cook cycle should not be started, until the initial
fill and preheat is completed, in order for the
boiler steam pressure to be within operational
limits.
• Green READY is ON.
• Product is inserted into steamer.
• Door is closed.
• Timer is dialed on timer.
2. Contacts 1/3 of cook timer close.
• Green READY light turns OFF.
• Red COOKING light turns ON.
• Timer motor is energized.
• Compartment steam solenoid valve
energized and steam begins to enter the
compartment.
NOTE: Heating elements will come on after the boiler
pressure drops below the low pressure set point (11
PSI) and will stay on until the high pressure set point
(13 PSI) is reached. As long as steam pressure is
within these limits, even while cooking, heating
elements can go off. The boiler is able to re-pressurize
to the upper set point, even with both compartments
in cook mode.
NOTE: The CWC thermostat remains closed and
CWC solenoid stays energized while cooking. If main
water is shut off after boiler fill, then no cold water is
present to condense steam/hot water and steam
vapors exit the floor drain.
3. Time expires on timer.
• Timer contacts 1/3 open.
• Steam solenoid valve de-energized,
stopping the flow steam into compartment.
• Red COOKING light turns OFF.
• Timer contacts 4/1 close and energize
buzzer until manually turned off.
• Green READY light turns ON.
• Timer motor de-energized.
4. Timer manually turned off.
• Contacts 1/4 open.
• Alarm buzzer de-energized and stops
buzzing.
5. Steamer reverts to preheat cycle until time is
dialed into timer and the door is shut, water level
drops below LLCO probe or the power switch is
turned OFF.
Water Refill (After Initial Fill)
1. Water level drops below LL probe.
• Power is removed from terminal 2 on the
water level control.
• The IL relay is de-energized, returning
ILR-1 (N.O.) and ILR-2 (N.C.) contacts
back to their original state.
• HL relay is energized.
• Contacts HL-3 close. 2) HL
• HL LED turns ON.
• Fill solenoid is energized and water
flows into tank.
2. Water reaches LL probe.
• Power to terminal 2 on the water level
control is present but no switching occurs.
3. Water reaches HL probe.
• The IL relay of the is energized, changing
the state of ILR-1 (N.O.) and ILR-2 (N.C.)
contacts.
• HL relay is de-energized.
• HL-3 opens.
• Fill solenoid de-energized and water
stops flowing into tank.
• HL LED turns OFF.
VSX BOILER BASE SERIES CONVECTION STEAMERS - ELECTRICAL OPERATION
F24627 (0916) Page 40 of 82