Troubleshooting Gas Control (Sit 630 Gas Valve) - Vermont Castings RHEDV25 Installation Instructions & Homeowner's Manual

Vermont Castings, Majestic Products RHEDV Direct 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.
WARNING: Before doing any gas control service work, remove glass front.
Symptom
1. Spark ignitor will not light
2. Pilot will not stay lit after
carefully following lighting
ment instructions.
3. Pilot burning, no gas to
burner, Valve knob "ON".
4. Frequent pilot outage
problem.
16
Eurosit 630 Gas Valve
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 impinge-
on thermocouple.
Turn valve knob to "Pilot". Maintain flow to pilot;
millivolt meter should read greater than 10 mV. If the
reading is okay and the pilot does not stay on, replace
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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