Vermont Casting 3031, 3033 Troubleshooting, Condition, Possible Cause, W A R N I N G, 20005004

Vermont Castings UVS27 Vent-Free Gas Heater

Troubleshooting

Follow these procedures in the order presented.

W A R N I N G

TURN OFF HEATER AND ALLOW TO COOL

COMPLETELY BEFORE SERVICING.

CONDITION POSSIBLE CAUSE SOLUTION

No spark at pilot when Ignitor is operated.

1.Ignition Electrode is disconnected from ignition wire, broken or incorrectly positioned.

2.Ignitor wire is broken.

3.Bad Piezo Ignitor.

1.Inspect and re-connect, replace or repair as necessary.

2.Replace wire.

3.Replace Piezo Ignitor.

The Ignitor Electrode sparks, but Pilot does not light.

1.Gas supply is turned off or supply line shut-off valve is closed.

2.Control Knob is not in PILOT position.

3.Control Knob not pressed in while in PILOT position.

4.Air present in gas lines.

5.Inlet supply pressure is not within correct settings.

1.	Turn on gas supply or open
	supply line shut-off valve.
2.	Turn Control Knob to PILOT.
3.	Press Control Knob in while in
	the PILOT position.
4.	Continue holding in Control Knob
	and repeat ignition procedure
	until air is bled from the lines.
5.	Call local gas supplier. Adjust
	inlet supply pressure to specifica-
	tion: NG; 5.5” w.c.-14.0”w.c. LP;
	11.0” w.c.-14.0”w.c.

6. Other conditions that should be identified only by a qualified gas technician.

			Piezo Ignitor
					TH
				PILOT	OFF
					TP
	I	L
	H		ON
		O			TPTH
					PILOT ADJ
		Regulator
HV104					Pilot / Main Control
Fig. 33	Honeywell valve assembly.
18

6. Call qualified gas technician.

20005004