Vermont Casting 3225 ユーザーズマニュアル

25

NOTE: Before troubleshooting the gas control system, be sure the external gas shutoff is in the “ON” position.

1.  Spark ignitor will 

not light

2.  Pilot will not stay lit 

after carefully fol-
lowing the lighting 
instructions

3.  Pilot lights, no gas 

to burner, valve 
knob ON, remote 
switch (rocker 
switch) ON

4.  Frequent pilot out-

age

A.  Defective or misaligned 

electrode at the pilot

B.  Defective ignitor (push but-

ton)

A.  Defective pilot generator 

(thermocouple)

B.  Defective automatic valve 

operator

A.  Remote switch or wires 

defective

B.  Thermopile may not gener-

ate sufficient voltage

C. Plugged burner orifice
D. Defective automatic valve 

operator

A.  Pilot flame may be too low 

or high, (blowing or lifting), 

causing the pilot to drop out

B.  Possible blockage of the 

vent terminal

Using a match, light pilot. If pilot lights, turn off pilot and 
push the ignitor button again. If pilot will not light, check 
gap at electrode and pilot - it should be 1/8” to have a 
strong spark.

Push piezo ignitor button. Check for spark at electrode 
and pilot. If there is no spark at the pilot, and electrode 
wire is properly connected, replace ignitor.

Check pilot flame. It must impinge on the thermocouple 
or thermopile. NOTE: This pilot burner assembly uses 
both a thermocouple and a thermopile. The thermocou-
ple operates the pilot flame. Tighten the thermocouple. 
The thermopile operates the main valve (ON and OFF). 
Clean and/or adjust pilot for maximum flame impinge-
ment on thermocouple and thermopile.

Turn valve knob to ‘Pilot’. Maintain flow to pilot; millivolt 
meter should read greater than 10mV. 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.

Check rocker switch and wires for proper connection. 
Use jumper wires across terminals at rocker switch. If 
burner lights, replace rocker switch. If okay, use jumper 
wires across rocker switch wires at the valve; if burner 
lights, wires are faulty or connections are bad.

1. Be sure wire connections from thermopile at gas valve 

terminals are tight and thermopile is fully inserted into 
pilot bracket.

2. One of the rocker switch wires may be grounded. 

Remove rocker switch wires from valve terminals. If 
burner now stays lit, trace rocker switch wiring from 
ground. It may be grounded to the appliance or the 
gas supply line.

3. Check the thermopile with a millivolt meter. Take read-

ing at thermopile (“TP” and “TP/TH”) terminals of gas 
valve. Should read 325 millivolts minimum while hold-
ing valve knob depressed in PILOT position and with 
rocker switch OFF. Replace faulty thermopile if reading 
is below specified minimum.

Check burner orifices for debris, and remove.
Turn knob to ON, place rocker switch to ON, millivolt me-

ter should read greater than 10 mV. If the reading is okay 

and the burner does not light, replace the valve.
Clean and/or adjust pilot flame for maximum flame im-

pingement on thermocouple and thermopile.

Check the vent terminal for blockage.