Vermont Casting SDDVRBD 사용자 설명서

34

NOTE:  Before trouble shooting the gas control system, be sure external gas shut off is in the “On” position.

1.  Spark ignitor will not light

2.  Pilot will not stay lit after 

carefully following lighting 
instructions

3.  Pilot burning, no gas to 

main burner

4.  Frequent pilot outage 

problem

A.  Defective or misaligned electrode 

at pilot

B.  Defective ignitor (Push Button)

A.  Defective pilot generator (thermo-

couple), remote wall switch

B.  Defective automatic valve

A.  Wall switch or wires defective

B.  Thermopile may not be generat-

ing sufficient millivoltage

C.  Plugged burner orifice

D.  Defective automatic valve opera-

tor

A.  Pilot flame may be too low or 

blowing (high) causing the pilot 
safety to drop out

B.  Possible blockage of the vent 

terminal

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.
With the control knob in the pilot position, push the 
control knob all the way and hold.  Check for spark at 
electrode and pilot. If no spark to pilot, and electrode 
wire is properly connected, replace the battery in the 
ignitor module and try again. Refer to Maintenance 
Section. If the problem still exists, replace the ignitor 
module box.
Check pilot flame. Must impinge on thermocouple/ther-
mopile. NOTE: This pilot burner assembly utilizes both 
a thermocouple and a thermopile. The thermocouple 
operates the main valve operation (On and Off). Clean 
and or adjust pilot for maximum flame impingement on 
thermopile and thermocouple.
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 wall switch and wires for proper connections. 
Jumper wire across terminals at wall switch, if burner 
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.
1.  Be sure wire connections form thermopile at gas 

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

2.  One of the wall switch wires may be grounded. Re-

move wall switch wires form valve terminals if pilot 
now stays lit, trace wall switch wiring for ground. 
May be grounded to fireplace or gas supply.

3.  Check thermopile with millivolt meter. Take reading 

at thermopile terminals of gas valve. Should read 
250-300 millivolts (minimum 150) while holding 
valve knob depressed in pilot position and wall 
switch “Off”. Replace faulty thermopile if reading is 
below specified minimum.

Check burner orifices for debris and remove.
Turn valve knob to “On”, place wall switch to “On” 
millivolt meter should read greater than 150mV. If the 
reading is okay and the burner does not come on, 
replace the gas valve.
Clean and/or adjust pilot flame for maximum flame 
impingement on thermopile and thermocouple.

Check the vent terminal for blockage (recycling the flue 
gases).