Monessen Hearth 36CDVXTRN Benutzerhandbuch

33

   

1. Spark ignitor will not light 

A. Defective or misaligned  

Using a match, light pilot. If pilot lights, turn off    

   

 

  electrode at pilot. 

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.

   

 

   

 

B.  Defective ignitor (Push Button) 

Push Piezo Ignitor Button. Check for spark at  

 

   

 

   

electrode and pilot. If no spark to pilot, and elec-   

   

 

   

trode wire is properly connected, replace ignitor.

2. Pilot will not stay lit after 

A.  Defective pilot generator 

Check pilot flame.  Must impinge on thermo- 

 

  carefully following lighting 

  (thermocouple), remote wall  

couple/thermopile.  Note: this pilot burner assem- 

  instructions. 

  switch. 

bly 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.

   

 

B. Defective automatic valve 

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.

3. Pilot burning, no gas to 

A. Wall switch or wires defective 

Check wall switch and wires for proper connec-   

  main burner 

   

tions. 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.

   

 

B. Thermopile may not be 

1. Be sure wire connections from thermopile at    

   

 

  generating sufficient 

  gas valve terminals are tight and thermopile is fully  

   

 

  millivoltage. 

  inserted into pilot bracket.

   

 

   

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

   

 

   

  Remove wall switch wires from 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.

   

 

   

 

C. Plugged burner orifice. 

Check burner orifices for debris and remove.

   

 

D. Defective automatic valve  

Turn valve knob to “On”, place wall switch to “On”  

   

 

  operator. 

millivolt meter should read greater than 100 mV.  If  

   

 

   

the reading is okay and the burner does not come  

   

 

   

on, replace the gas valve.

4. Frequent pilot outage 

A. Pilot flame may be too low 

Clean and/or adjust pilot flame for maximum flame 

  problem. 

  or blowing (high) causing the 

impingement on thermopile and thermocouple.

   

 

  pilot safety to drop out.

   

 

B. Possible blockage of the vent 

Check the vent terminal for blockage (recycling the  

   

 

  terminal. 

flue gases)

   

 

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