Troubleshooting Gas Control (Sit 630 Gas Valve) - Majestic Vemont Castings RHE25 Installation Instructions & Homeowner's Manual

Vermont Castings, Majestic Products RHE Natural Vent Insert
Troubleshooting the Gas Control System
NOTE: Before troubleshooting the gas control system, be sure external gas shut off is in the "On" position.
Symptom
1. Spark ignitor will not light
2. Pilot will not stay lit after
carefully following lighting
instructions.
3. Pilot burning, no gas to
burner, Valve knob "ON".
4. Frequent pilot outage
problem.
16
Eurosit 630 Gas Valve
WARNING: Before doing any gas control service work, remove glass front.
Possible Causes
A. Defective or misaligned
electrode at pilot.
B. Defective ignitor (Push Button)
A. Defective pilot generator
thermocouple.
B. Defective automatic valve
operator.
A. Sensing bulb not in proper
location.
B. Temperature sensing bulb
damaged or tubing to bulb
kinked
A. Pilot flame may be too low
or blowing (high) causing the
B. Possible leak in liner or seals.
Corrective Action
Using a match, light pilot. If pilot lights, turn off pilot
and push the red button again. If pilot will not light
- check gap at electrode and pilot-should be 1/8" to
have a strong spark.
Push Piezo Ignitor Button. Check for spark at
electrode and pilot. If no spark to pilot, and electrode
wire is properly connected, replace ignitor.
Check pilot flame. Must impinge on thermocouple.
Clean and or adjust pilot for maximum flame
impingement on thermocouple.
Turn valve knob to "Pilot". Maintain flow to pilot;
millivolt meter should read greater than 10 mV. If
reading is okay and the pilot does not stay on, re-
place the gas valve. Note: An interrupter block (not
supplied) must be used to conduct this test.
Make sure sensing bulb is located in bracket on the
lower right hand side of unit.
Carefully examine sensing bulb and capillery tube for
damage. If tubing is kinked, replace gas valve.
Clean and/or adjust pilot flame for maximum flame
impingement on thermocouple.
pilot safety to drop out.
Check the venting for leaks or blockage.
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