Vermont Castings UVS27
Troubleshooting cont’d. |
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CONDITION | POSSIBLE CAUSE | SOLUTION |
Pilot lights but flame goes out when Control Knob is released.
Pilot flame is lifting.
Thermopile
Thermo- couple
ST121a
Pilot flame is weak - does not touch Thermocouple.
1.Control Knob not fully depressed or held in long enough.
2.Gas supply line
3.Thermocouple connection is loose at the Control Valve.
4.Pilot flame does not touch the Thermocouple. (Figs. 29, 30) This can be caused by:
A)Incorrect gas pressure, and/or
B)other conditions that should be identified only by a qualified service technician.
5.Thermocouple is damaged.
6.Control Valve is damaged.
1.Depress Control Knob fully and hold in for a full 30 seconds.
2.Fully open gas supply line shut- off valve.
3.Inspect and tighten securely.
4.A) Call local gas supplier. Adjust inlet supply pressure to specifica- tion: NG; 5.5”
B)Call local gas service techni- cian.
5.Call local gas service technician.
6.Call local gas service technician.
Correct LP Pilot Flame. | Correct NG Pilot Flame. |
Pilot lights but Main Burner does not.
1.Gas supply line
2.Foreign material is blocking Burner ports.
3.Main Burner orifice is clogged.
4.Thermostat or remote switch not activated on JUVS.
5.Bad Thermopile.
1.Fully open gas supply line shut- off valve.
2.Insptect and clear debris away from Burner ports.
3.Call local gas service technician.
4.Set thermostat to higher tem- perature or check remote switch.
5.Call local gas service technician.
Main Burner shuts off and Pilot | 1. Insufficient fresh air. | 1. Determine that adequate ventila- |
flame goes out while in operation. |
| tion exists to provide sufficient |
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| fresh air. Open a window or |
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| provide additional ventilation. |
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| (See Fresh Air Requirements, |
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| Pages |
| 2. Incorrect inlet supply pressure. | 2. Call local gas supplier. Adjust |
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| inlet supply pressure to specifica- |
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| tion: NG; 5.5” |
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| 11.0” |
20005004 | 19 |
