Vulcan-hart C24EO3 User Manual download pdf (Page 19)

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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