Models 24-CGA-10 and 24-CEA-10
SteamCraft 10 Service Manual, Chapter 5
Page 85
ON/OFF
Switch
Power from the main transformer connects to the center terminals of the
double-pole/double -throw ON/OFF switch. In the ON position, as shown in
Figure 5-15, the switch connects the center terminals to the bottom
terminals as viewed from the terminal side (rear) of the switch.
• In units with the electronic key pad timer, the ON/OFF switch in the ON
position supplies power to one side of the timer countdown circuits
through the compartment thermal switch. The ON/OFF switch also
supplies power to the 24-volt transformer which provides control power
to the key pad timer.
• In units with the mechanical dial timer, the ON/OFF switch set to ON
supplies power to one side of the 3-second timer and buzzer for operation
by the timer control
Setting the ON/OFF switch to OFF removes power from the steamer com-
ponents that control the various operating cycles, and starts the 3-minute
timer circuit, which controls the steam generator blowdown and float cylin-
der rinse cycle.
TIMED/MANUAL Switch
Setting th
e
ON/OFF switch to ON supplies power to the center terminals of
the TIMED/MANUAL switch of both cooking compartments. Refer to
Figure 5-16. When th
e
this switch is set to MANUAL, the compartment
steaming circuits are energized directly. When thi
s
switch is set to TIMED.
th
e
compartment steaming circuits are energized through th
e
timer (with a
steaming time set). The components in the compartment steaming circuit
differ for each model.
•
For Model 24-CEA-10: the condenser solenoid and heater contactor are
energized, through the lower float (L.W.C.O.) switch and the high
temperature limit switches when all are closed.
• For Model 24-CGA-10: th
e
compartment steam valve, th
e
relays R1
(upper) and R2 (lower), and th
e
condenser solenoid are in this circuit
This model has only one steam generator and one float. Therefore, the
lower float (L.W.C.O.) switch is part of burner control circuit, not the
compartment steaming circuit.
During shutdown, the 3-minute timer controls the fill and rinse solenoids.
Setting the ON/OFF switch to OFF starts the 3-minute timer and energizes
timer terminals 2-3. During countdown, the timer contacts close the blow-
down circuit components. After 3 minutes, the contacts of the timer open to
remove power from the blowdown circuit The components in the
blowdown circuit differ for each model.
• For Model 24-CEA-10: The 3-Minute Timer energizes the rinse valves to
flush both float cylinders, and relay R1. When the R1 contactors close,
both water fill valves open for blowdown of both steam generators.
• For Model 24-CGA-10: The 3-Minute Timer energizes the fill valve for
steam generator blowdown and the rinse valve to flush the float cylinder.
3-Minute Timer
