Vanox LYRA VZB28BN, Operation Instructions Manual

Page: 26 / 30

Gas Control Valve:
Maintenance
Figure 40.
SIT Nova 820 gas valve.
Pilot Burner Adjustment:
1. Locate Pilot Adjustment Screw. (See figure 19.)
2. Adjust pilot screw to provide properly sized flame as
shown in figure 19).
3. After installing or servicing, leak test with a soap solution
with main burner on. Coat pipe and tubing joints, gasket
etc. with soap solution. Bubbles indicate leaks. Tighten any
areas where the bubbles appear until the bubbling stops
completely.
Figure 41.
Pilot Burner.
Troubleshooting:
The following information grid is a troubleshooting chart of possible problems:
NOTE:
Before troubleshooting the gas control system, be sure external gas shut off is in the “ON” position.
Problem Possible Causes Corrective Action
Spark igniter will not light. Defective or misaligned. Check for spark at electrode and pilot: If no spark and
electrode at pilot. electrode wire is properly connected, replace igniter.
Defective igniter Using a match, light pilot, If pilot lights, turn off pilot and
(push button) push the red buttonagain. If pilot will not light - check
gap at electrode and pilot should be 1/8” to 1/4” to have
a strong spark.
Pilot will not stay lit after care- Defective safety spill switch Check pilot flame. Must impinge on generator and ther-
fully following lighting instru- mocouple. Clean and/or adjust pilot for maximum flame
ctions. impingement on generator and thermocouple.
Be sure wire connections from spill safety switch are
connected securely to wires on back of valve.
If pilot still doesn’t light, unplug spill switch wires at valve
and then plug thermocouple wires, (blue) together. If this
works, the spill switch is defective.
Defective Thermocouple Replace Thermocouple
Defective valve magnet Turn valve knob to “ON”, place wall switch on “ON” milli-
volt meter should read greater than 100mV. If the reading
is okay and the burner does not come on, replace the gas
valve.
Pilot burning, no gas to burner, Wall switch or wires defective. Check wall switch and wires for proper connections.
Valve knob “ON’ Wall switch, Jumper wires across terminals at wall switch. If burner
“ON”. comes on, replace defective wall switch. If okay, jumper
wires ,across wall switch wires at valve. If burner comes
on, wires are faulty, or connections are bad.
Generator may not be Check generator with millivolt meter. Take reading at
generating sufficient voltage. generator terminals at gas valve. Should read 325 milli-
volts minimum while holding valve knob depressed in
pilot position and wall switch “Off”. Replace faulty genera
tor if reading is below specified minimum.
Plugged burner oriface Check burner oriface for stoppage and remove.
Defective Automatic valve Remove wall switch wires from gas valve, install jumper
operator. wires from top bottom terminals of gas valve. Turn valve
“ON”. If main burner does not light, replace valve.
Frequent Pilot outage problem Pilot flame may be to low or Clean and / or adjust pilot flame for maximum flame
blowing (high) causing the impingement on generator and thermocouple.
pilot safety to drop out.
Part. No.
VZB28BN-Man-101817-A
VZB28BN Gas Fireplace VANOX Fireplace Inc.
Page 26