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C24EO SERIES STEAMER - ELECTRICAL OPERATION
8. Turn cook timer off.
A. Timer contacts 11 & 14 open, buzzer is de-
energized.
B. Steamer reverts to hold temperature and
continues to cycle until a cook time is
dialed on timer, power switch is turned to
off, or the door is opened.
NOTE: If water level becomes low during
cycling, low water thermostat (2TAS) will open
and low water light (1LT, amber) will come on
and buzzer will sound. Timer and heating circuit
will be de-energized until water level is
replenished and thermostat closes.
Constant Cooking Mode
1. Conditions.
A. Steamer connected to correct voltage and
is properly grounded.
B. Power switch (1S) off.
1) Relay K3 energized. K3 N.C.
contacts open.
C. High limit thermostat closed.
D. Hold thermostat closed.
E. Low water thermostat closed.
F. Temperature control is setup properly and
is ready to use.
G. Door closed (door switch closed).
H. Timer off.
I. Cooking compartment filled to the water
level mark and below hold temperature of
175°F (+/- 5°F).
J. Drain valve is closed (drain lever pushed
in).
2. Press momentary start switch (1S).
A. Limiting contactor (1CON) coil energized
thru high limit thermostat (1TAS).
1) Line voltage is supplied to one side of
heating elements.
B. Relay K2 coil energized thru low water
thermostat (2TAS).
1) K2 N.O. contacts close.
a. Power switch circuit is latched.
2) K2 N.C. contacts open.
a. Low water light (1LT) and buzzer
are de-energized.
C. ON indicator light (2LT, amber) comes on.
D. Relay K1 coil energized thru door switch
and hold thermostat (3TAS).
1) K1 N.O. contacts close and regulating
contactor (2CON) coil is energized.
a. Line voltage is supplied to other
side of heating elements.
Elements heat.
2) K1 N.C. contacts open.
3. Steamer reaches 175°F.
A. Hold thermostat opens and relay K1 coil is
de-energized.
B. K1 N.C. contacts close and N.O. contacts
open.
NOTE: Steamer will maintain hold temperature
until a cook time is dialed on timer, door is
opened, or power switch is turned off.
4. Set cook timer to constant.
A. Timer contacts 21 & 23 close, cook light
(3LT, red) comes on.
B. Temperature controller energized and
evaluates input from thermocouple.
1) If temperature is below set point,
temperature controller internal N.O.
contacts close and energize
regulating contactor (2CON) coil thru
K1 N.C. contacts.
a. Line voltage is supplied to other
side of heating elements.
Elements heat.
5. Temperature reaches set point and the
temperature control’s internal N.O. contacts
open.
A. Regulating contactor (2CON) coil de-
energized and power is removed from
heating elements.
6. Steamer cycles on the temperature control until
cook timer turned off.
7. Turn cook timer off.
A. Timer contacts 21 & 23 open, cook light
(3LT, red) goes out and temperature
controller is de-energized.
B. Steamer reverts to hold temperature and
continues to cycle until a cook time is
dialed on timer, power switch is turned to
off, or the door is opened.
NOTE: If water level becomes low during
cycling, low water thermostat (2TAS) will open
and low water light (1LT, amber) will come on
and buzzer will sound.
F25386 (June 2010)
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