Service manual

VSX SERIES STEAMER - ELECTRICAL OPERATION
Page 31 of 40
A. LLCO energizes.
1) Contacts LLCO-1 open; LLCO-2 close.
2) LLCO LED lights.
4. Water reaches LL (Low Level) probe.
5. Water reaches HL (High Level) probe.
A. Internal relay HL energizes.
B. HL LED lights.
C. Internal relay coil HL locks through HL-1.
6. 1SOL de-energized; water flow off.
A. After the initial fill, the water level is
maintained by 1SOL being energized when
the water level drops below the LL probe
and being de-energized when the water
level reaches the HL probe. This will not
affect operation of either the preheat or
cook cycle due to 1K being energized and
locked during the initial fill.
B. 1K energized and locks 1K coil when 1K
NO/C close.
C. 2K energized thru 2TAS, 1K-NO/C, WLC-
LLCO-2.
D. 1CON and 2CON energized thru 2K-2
NO/C, 2TAS, 1K-NO/C, WLC-LLCO-2.
7. Heaters are energized.
8. Tank temperature reaches set point.
A. 2TAS opens.
9. 2K de-energized.
A. 1CON & 2CON de-energized.
B. Heaters de-energized.
C. 1LT ready light energized thru 1CON &
2CON coils to indicate tank is at hold
temperature. 1LT uses bleed through
voltage.
10. Tank temperature drops below set point.
A. Tank temperature is maintained by the
heaters cycling with control thermostat
2TAS until time is dialed on the timer, water
level drops below the low level cut-off probe
or the power switch is turned “off”.
B. 1LT ready light goes out.
11. Water level drops below LL probe.
A. Internal relay HL de-energized, contacts HL-
1 open; HL-2 close; HL-3 open.
1) Power is removed from the heating and
cooking circuits.
COOK CYCLE
1. Cook cycle can not start until the initial fill and
preheat is completed and the door is closed.
A. 2K-1 (NC/C) contacts are open during
preheat and will prevent operation of the
timer, buzzer, 2SOL and 2LT.
2. Ready light lit.
A. Product is inserted into steamer.
B. Door is closed.
C. Time is dialed on the timer.
3. Contacts 1/3 of timer close.
A. 1CON and 2CON are energized by the
closing of 1TR 1/3 contacts and thru 2K-2
NC/C contacts.
NOTE:
Heaters are not controlled by 2TAS and
are on continuously during the cook cycle.
B. Ready light goes out.
C. Cook light lights.
D. 2SOL energized and water flows to drain to
condense steam.
E. Timer motor energized.
F. Delime timer board begins to monitor
cooking hours.
4. Time expires on timer.
A. Timer contacts 1/3 open, 2LT de-energized.
B. Timer contacts 4/1 close and energize
buzzer until manually turned "off".
C. Timer motor de-energized.
D. 2SOL de-energized and water is shut off
from drain.
E. 1CON and 2CON de-energized and are
controlled by 2TAS.
5. Steamer reverts to preheat cycle until time is
dialed into timer and the door is shut, water
level drops below low level cut-off probe or the
power switch is turned "off".
WATER REFILL (AFTER INITIAL FILL)
NOTE:
This water refill cycle will not affect
operation of either the preheat or cook cycle due to
1K being energized and locked during the initial fill.
1. Water level drops below low level probe (LL).
A. WLC internal coil HL de-energized.
1) WLC contacts HL-3 open.
2) WLC contacts HL-2 close.
2. 1SOL energized, water flows.
3. Water reaches LL (Low Level) probe.
A. Power to pin 2 of water level control.
4. Water reaches high level probe.
A. Internal coil HL of water level control is
energized.
1) WLC HL-2 opens.
2) WLC HL-3 closes.
3) WLC HL-1 close.
5. 1SOL de-energized.
6. The water refill cycle will occur whenever the
water level is below the low level probe.