Vulcan-Hart VL3GMS, VL2GMS, VL3GAS, VL2GAS, VL2GSS, VL3GSS Terminals, Spark Ignition Control Test

VL SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS

Once the pilot flame is confirmed, a 24 volt output from terminal one will be sent, allowing the main valve (cycling) coil of the combination valve to operate at the request of the cycling pressure switch.

Terminals:

1.Main Valve - 24VAC will be present on terminal #1 with the pilot sensing electrode sensing an adequate pilot fame. This output will remain present as long as the pilot flame remains adequate.

2.Common (MV/PV).

3.Pilot Valve - 24VAC will be present on terminal #3 at the instant an input voltage is supplied to the module. This voltage will remain present on terminal #3 providing an adequate pilot flame is established within 90 seconds. In the event that an adequate pilot flame is not established within 90 seconds this output voltage will drop out.

4.Ground (burner).

5.24VAC Neutral (ground).

6.24VAC Input.

7.High Voltage to spark electrode (The pilot flame current is sensed by the Ignitor Module via the spark electrode high voltage wire and terminal #9).

Spark Ignition Control Test

1.If the ignition control module does not appear to be sparking to ignite gas, perform the following:

A.Check to ensure that all electrical terminal connections on the ignition control module and the ignitor are clean and tight. If loose connections are found, make the necessary adjustments.

B.Verify that the ignition control module and the ignitor have good ground wire connections. The ignitor mounting bracket should have good metal to metal contact to its mounting surface.

C.Remove the pilot ignitor and check the following:

1)The gap between the spark probe and the ground clip should be approximately 1/8 inch. If the gap appears to be excessive or poor sparking is occurring then adjust.

2)Inspect the ceramic flame rod insulator for cracks or evidence of exposure to extreme heat, which can permit leakage to ground. If either of these conditions exist, then replace the pilot ignitor and re-test.

3)Check the ignition cable for tightness or damaged insulation. If the ignition cable appears to be damaged, then replace it and re-test.

2.Install the pilot ignitor and attach ignition cable.

A.Turn the main power switch ON and verify the ignition control modules re-set switch is ON. Observe spark condition from ignitor.

1)If a spark from ignitor is present and ignites the gas from the pilot and burner then the system is working properly.

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