Vermont Casting 2468 사용자 설명서

15

A. Defective or misaligned 

Using a match, light [ilot. If pilot lights, turn off pilot and

electrode at the pilot 

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.

B. Defective ignitor (push  

Push piezo ignitor button. Check for spark at electrode

button) 

and pilot. If there is no spark at the pilot, and electrode

 

wire is properly connected, replace ignitor.

A. Defective pilot generator 

Check pilot flame. It must impinge on the thermocouple

(thermocouple) 

or thermopile. NOTE: This pilot burner assembly uses  

 

both a thermocouple adn a thermopile. The thermo-

 

couple operates the pilot flame. Tighten the thermo-

 

couple. The thermopile operates the main valve. (ON 

 

and OFF) Clean and/or adjust pilot for maximum flame  

 

impingement on thermocouple and thermopile.

B. Defective automatic valve 

Turn valve knob to “Pilot”. Maintain flow to pilot; millivolt

operator 

mete 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.

C.Defective safety switch 

Check the continuity accross the safety limit switch with

 

the unit cold. If there is no continuity, the safety switch 

 

needs to be replaced.

A. Remote switch or wires 

Check rocker switch and wires for proper connection

defective 

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.

B. Thermopile may not gen- 

1. Be sure wire connecitons from thermopile at gas 

ate sufficient voltage 

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 wire form valve termianls. If

 

burner now stays lit, trace rocker switch wiring from

 

ground. It may be grounded to the appliance of the

 

gas supply line.

 

3. Check the thermopile with a millivolt meter. Take

 

reading at thermopile (“TP” and “TP/TH”) terminals of

 

gas valve. Should read 325 millivolts minimum while

 

holding valve knob depressed in PILOT position and 

 

with rocker switch OFF. Replace faulty thermopile if

 

reading is below specified minimum.

C. Plugged burner orifice 

Check burner orifices for debris, and remove.

D. Defective automatic valve 

Turn knob to ON, place rocker switch to ON. Millivolt

operator 

meter should read greater than 10mV. If the reading is

 

okay and the burner does not light, replace the valve.

A. Pilot flame may be too low 

Clean and/or adjust pilot flame for maximum flame

or high, (blowing or lifting). 

impingement on thermocouple and thermopile.

causing the pilot to drop out
B. Possible blockage of the  

Check the vent termianl for blockage.

vent terminal

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