Troubleshooting - Lennox Hearth Products Shoreline 33/40 DV INS Installation And Operation Manual

TROUBLESHOOTING

NOTE: When troubleshooting the gas control system, be sure the external gas shut off valve, located at the gas supply inlet is in the "ON" position.
IMPORTANT: Call your gas supplier or plumber for additional help with any gas control problem. Valve system troubleshooting should only be
accomplished by a qualified service technician.
SYMPTOM
Thin black coating (soot)
forms on the viewing
glass, logs, or firebox
Humming or whistling
coming from insert.
A change in flame appear-
ance or burner operation.
Spark igniter will not light
pilot after repeated tries.
Pilot will not stay lit after
carefully following lighting
instructions.
Main burner will not burn.
6
PROBABLE CAUSE
Improper log or ember See Brick Panel and Log Set Installation on Pages 13 through 15. If there is soot in one
placement specific location, the rockwool below this location needs to be adjusted. This can be done
by pulling embers forward slightly. If the flames have soot tails, the shutter will need to
Improper air shutter be opened.
setting
If sooting continues open air shutter (see Air Shutter Adjustment on Page 20)
Not enough combus-
tion air Check for debris obstructing air flow in valve compartment under insert or in front of
lower venting.
Normal operating noise See Quiet Operation on Page 21. The noise may be reduced by slightly turning down the
flame. Turning the flame down will reduce the heat output of the insert.
Obstructed orifice If noise is excessive or is "whistling" have your gas supplier check the regulator and
opening orifices and replace if necessary.
A change in gas pres- Have your gas supplier check for correct gas pressure (7" W.C. / po. C.E. [1.74 kPa] natu-
sure ral gas; 11" W.C. / po. C.E. [2.74 kPa] LP gas). NOTE: NEVER BLOCK OR OBSTRUCT AIR
INTAKE OR OUTLET VENTS.
Improper ember place- See Brick Panel and Log Set Installation on Pages 13 through 15.
ment
No gas supplied to unit Check gas supply. To purge, hold in gas cock on valve for 1-2 minutes and try again.
or air in line
Defective igniter (no Check for spark at electrode and pilot, if no spark and electrode wire is properly con-
spark at electrode) nected, replace igniter and igniter wire.
Defective or misaligned Using a match, light pilot. If pilot lights, turn off pilot and trigger the igniter again. If pilot
electrode at pilot (spark lights, an intermittent gas/air supply may be the problem, if longer purge will not light
at electrode) - check gap between electrode and pilot - should be 1/8 inch (3 mm) to have a strong
spark. If OK, replace pilot.
Low gas inlet pressure Check inlet pressure and adjust pilot if necessary.
Defective thermopile Be sure wire connections from thermopile are tight at gas valve terminals and at vent
safety snap switch.
Either rocker switch or thermostat wires may be grounded. Remove wires from valve
terminals. If pilot stays lit, trace switch wiring for a ground. May be grounded to insert or
gas supply.
Defective automatic Check open circuit millivolt output of thermopile. Reading should be greater than 325mV.
valve operator Also check thermopile wire for kinks that can cause loss of mV. Replace faulty thermopile
if wire is okay and reading is less than 325mV.
Turn valve knob to "ON" and thermostat (if installed) to 90º. Millivolt meter should read
greater than 100 mV. If reading is OK and burner does not turn on, replace gas valve
(qualified service technician only).
Pilot has gone out See Lighting Instructions.
Rocker switch, thermo- Disconnect rocker switch and thermostat wires at terminals 1 and 3 on valve. Jumper
stat, or wires defective across from 1 to 3 with pilot lit. If burner comes on either rocker switch, thermostat, or
wiring is not functioning.
Thermopile may not be Check thermopile with millivolt meter (see Maintenance and Servicing), recheck symp-
generating sufficient tom #2.
millivolts
NOTE: DIAGRAMS AND ILLUSTRATIONS ARE NOT TO SCALE
CORRECTIVE ACTION