•
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 low level cut-off 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.
•
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 high level probe.
•
The IL relay of the water level control 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.
4.
The water refill cycle will occur whenever the
water level is below the LL probe and will not
affect the operation of either the preheat or cook
cycle.
Boiler Blowdown / Drain
1.
Main power switch turned OFF.
•
Boiler blowdown sequence starts.
•
The blowdown solenoid valve (N.O.) is de-
energized and valve opens to drain the
boiler.
•
Power is removed from all components
except CWC thermostat and CWC solenoid
valve. The CWC thermostat cycles as
necessary to lower the discharge
temperature of the water and condense
steam going into the drain.
ELECTRIC MODELS
This sequence of operation is written for steamers with
solid state water level controls and the Cal-Code
option. Refer to Schematics, Electric Steamers, Boiler
Controls VSX24E, 36E and 42ET.
Initial Fill and Preheat
1.
Conditions.
•
Power switch OFF
•
Doors shut (N.O. door switch CLOSED).
•
Cooking timers OFF.
•
Unit connected to correct voltage supply.
•
L1 (HOT) to in-line fuse (10 amp.); to
one side of the primary on the step
down transformer (H1); from one side
of the secondary winding (X1) to one
side of the cooking compartment
pressure switch (N.O.), then to the
other compartment controls; to one
side of the Cold Water Condenser
(CWC) thermostat (N.O.); to one side
of the power ON/OFF switch.
•
L2 (NEUTRAL) to in-line fuse (10
amp.); to the other side of the primary
on the step down transformer (H2);
from the other side of the secondary
winding (X1) to the other side of the
cooking compartment controls; to the
other side of the CWC solenoid valve;
to the other side of the power ON/OFF
switch.
•
Unit properly grounded (boiler and water
level control share a common ground).
•
Water supply valve ON.
•
Control (cycling) pressure switch CLOSED.
•
High limit pressure switch CLOSED.
•
CWC thermostat OPEN.
•
Blowdown solenoid valve (drain) OPEN.
•
Boiler empty.
2.
Power switch (located on boiler control box)
turned ON.
•
RED power switch indicator light turns ON.
VSX BOILER BASE SERIES CONVECTION STEAMERS - ELECTRICAL OPERATION
F24627 (0916)
Page 38 of 82
