Vulcan K20GL User Manual download pdf (Page 25)

Fig. 44

3. Set VOM to micro amps scale (DC). Remove

flame sense wire from ignition module and

connect it to the black meter lead (-) and connect

red meter lead (+) to flame sense terminal.

4. Turn on/off switch on and set the temperature dial

to call for heat.

5. With kettle burner lit, meter reading should be

above 1.5 micro amps (minimum) and steady.

A. If reading is greater than or equal to 1.5

micro amps then flame sense current is

within tolerance. Turn on/off switch off and

reconnect flame sense wire.

B. If reading is less than 1.5 micro amps and

the condition of the spark ignitor and flame

sense has been verified as good, turn on/off

switch off. Install a replacement ignition

control module and check for proper

operation.

IGNITION CONTROL MODULE

TEST

Fig. 45

1. Access ignition control module in KETTLE

CONTROL AREA.

2. Turn the on/off switch on and set the temperature

dial to call for heat.

A. Power (1LT) light and heat light (3LT) come

ON.

3. Ignition control module is energized and trial for

ignition starts (6 seconds).

A. Verify 24VAC between terminals 25V & 25V

GND. If voltage is not present, check

transformer (1T) output voltage.

4. Spark voltage is sent from spark terminal to the

spark ignitor electrode and sparking begins. At

the same time, the ignition module contacts close

to energize gas valve coils, allowing gas flow to

the burner. The kettle burner will light, burner

flame is sensed and spark voltage from spark

terminal is removed (sparking stops).

A. Verify 24VAC between terminals valve and

valve. If voltage is not present, replace

ignition control module and check for proper

operation.

5. As long as the temperature controller is calling for

heat and the ignition control module is sensing a

sufficient flame sense current, the valve contacts

will remain closed.

K Series Gas Kettles 2/3 Jacketed Stationary and Tilting - SERVICE PROCEDURES AND ADJUSTMENTS

Page 25 of 44 F45461 Rev. A (0713)

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Vulcan K20GL User Manual Page 25

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