Lennox elite vint-dvs-u Benutzerhandbuch

Thin black coating 

(soot) forms on the 

viewing glass, logs, or 

firebox.

Improper log or ember 

placement.

Blocked flue.

Improper air shutter 

setting.

See Log Set and Ember Installation.

Check for obstructions in vent pipe, check for proper restrictor setting. See Flue Restric-

tors.

See Air Shutter Adjustment.

Humming or whistling 

coming from fireplace.

Normal operating noise.

Dirt in burner orifice.

See Quiet Operation. The noise may be reduced by slightly turning the flame down. Turning 

the flame down will reduce the heat output of the fireplace.

Clean orifice.

A change in flame 

appearance or burner 

operation.

A change in gas pres­

sure.

Improper ember or log 

placement.

Have your gas supplier check for correct gas pressure (7” W.C. natural gas; 11” W.C. LP 

gas). 

See Log Set and Ember Installation.

Pilot will not light.

No gas supplied to unit.    

 

Air in line.

Defective igniter (no 

spark at electrode).

The valve control knob 

is not turned to “pilot” 

and pushed in.

Turn on gas. 

To purge, hold in control knob in pilot position for 1­2 minutes and light.

Check for spark at electrode and pilot, if no spark and electrode wire is properly connected, 

replace igniter.

See Lighting Instructions.

Pilot will not stay lit 

after carefully following 

lighting instructions.

Pilot flame is not sur­

rounding thermocouple.

Thermocouple not 

generating sufficient 

voltage.

Air in gas supply line.

Check pilot flame adjustment (see Maintenance and Servicing section).

Check the connection between the thermocouple lead and the valve. Turn control knob to 

“pilot” and push in and light pilot. While lit, take millivolt reading at lead going into valve’s 

CPU. Minimum reading should be 17 millivolts. If less, replace thermocouple.

Purge air in pilot gas line by holding in control knob at “pilot” and sparking igniter. The air 

in the line may take up to several minutes to purge.

Main burner will not 

burn.

Pilot has gone out.

Rocker switch or 

thermostat wires are 

defective.

Thermopile may not be 

generating sufficient 

millivolts.

See Lighting Instructions.

Disconnect rocker switch and thermostat wires at terminals 1 and 3 on valve. Jumper 

across from 1 to 3 with pilot lit. If burner comes on either rocker switch or thermostat wir­

ing is not functioning.

Make sure thermopile is fully engulfed by the pilot flame. Check thermopile with millivolt 

meter. With pilot lit and the rocker switch and thermostat off, the millivolt reading with the 

meter connected to valve terminals 1 and 2 should be after 2 minutes at least 325. If the 

thermopile lead connections are good at terminals 1 and 2 and readings are less than 325, 

replace faulty thermopile.