Vulcan VG30 User Manual download pdf (Page 17)

GAS BRAISING PANS - SERVICE PROCEDURES AND ADJUSTMENTS

F25121 (February 2003)

Page 17 of 32

SPARK IGNITION TEST

If the ignition control module is not generating a

spark or the spark is not sufficient to light pilot

burner, perform the following test.

1. Lower the pan to the full down position, turn the

on/off switch on and set the temperature dial to

call for heat.

2. Verify the ignition control module is receiving

24VAC between terminals 5 & 6.

A. If voltage is present, turn the on/off switch

off and proceed to step 3.

B. If voltage is not present, see schematic

diagram.

3. Disconnect power to the machine.

WARNING: SHUT OFF THE GAS SUPPLY

BEFORE SERVICING THE UNIT.

WARNING: ALL GAS JOINTS DISTURBED

DURING SERVICING MUST BE CHECKED FOR

LEAKS. CHECK WITH A SOAP AND WATER

SOLUTION (BUBBLES). DO NOT USE AN OPEN

FLAME.

4. Verify all electrical connections (including

ground) on the ignition control module are

secure.

5. Access the pilot burner as outlined in

REMOVAL AND REPLACEMENT OF PARTS.

6. Verify the ground connection on pilot burner

mounting bracket is clean and secure. The pilot

burner should have good metal to metal contact

to the pilot mounting bracket.

7. Remove pilot burner and check the following:

A. Inspect the ceramic insulator on the

ignitor/flame sense electrode for cracks or

evidence of exposure to extreme heat,

which can permit leakage to ground. If

either of these conditions exist, then install

a replacement pilot burner.

B. Inspect the ignitor electrode and ground

clip for contaminates, or corrosion. Clean

those surfaces as necessary.

C. The spark gap between the ignitor/flame

sense electrode and the ground clip should

be 0.120" ± 0.020". If the gap is outside of

this dimension, bend the ground clip as

necessary, to make the adjustment.

D. Check the ignitor cable connection for

tightness and damaged insulation. If the

ignitor cable appears to be damaged, then

install a replacement ignitor cable.

8. Install pilot burner and connect ignitor cable.

9. Disconnect main valve (MV) lead wire from

terminal 1 on the ignition control module.

NOTE: Removal of lead wire prevents main burners

from lighting with the pan raised and the pan

position/down limit switch manually operated.

10. Reconnect power to the machine and turn the

gas supply on.

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Vulcan VG30 User Manual Page 17

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