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.

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F25386 (June 2010)