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23
NOTE: DIAGRAMS AND ILLUSTRATIONS ARE NOT TO SCALE
Maintenance Checklist
The following should only be performed by a qualified service techni-
cian.
1. Annual inspection should be made and the following checks
performed:
p When unit is cool, remove glass and inspect burner for dirt, soot,
and lint accumulations, and remove if necessary. If excessive soot
accumulation is present on burner, have a qualified service technician
adjust the burner for proper combustion.
p Clean inside of glass with gas fireplace glass cleaner. NEVER attempt
to remove or clean the glass when the unit is hot.
p Check the hot air outlet vents for lint or other accumulations. Never
block or restrict vent openings, obstruct flow of ventilation air, or use
vents other than Lennox Hearth Products products.
p Check that the chimney and its outlet are open and free of soot, block-
age, or debris.
p Check gaskets once a year. Gaskets must be tight. Replace if neces-
sary.
p Inspect the pilot system for proper flame (see Figure 39). NEVER
ADJUST THE PILOT until after the gas pressure has been checked
and the supply lines have been completely bled (this may take an hour
or more when bleeding through the pilot). All pilots are checked and
burned at the factory prior to shipment. The pilot adjustment screw
is located below the ON/OFF/PILOT control knob. Remove the pilot
adjusting cover with a flat-bladed screwdriver to access the pilot
adjusting screw. Adjust the pilot screw to properly size the flames.
The flames should directly contact the thermopile and extend across
the main burner ports. Be careful not to back the screw out of its
threads. Replace the cover and check for gas leaks using a gas leak
test solution.
p Check that the area around the insert is kept clear and is free of
combustible materials, gasoline, and other flammable vapors and
liquids.
p Check the millivolt system as per Table 13.
2. The viewing glass should be cleaned periodically (see Glass
Maintenance).
WARNINGS
•
Turn off gas and electrical power before servic-
ing the appliance.
•
Do not attempt to touch the front enclosure glass
with your hands while the fireplace is in use.
•
Any safety guard or screen removed for servicing
the appliance must be replaced prior to operat-
ing the appliance.
IMPORTANT
Always verify proper operation after servicing.
CAUTION
Wear gloves and safety glasses for protection
while doing required maintenance.
MAINTENANCE AND SERVICING
Check
Test
To
Test
Connect
Meter
Leads to
Terminals
Thermostat
Connects
Meter Read-
ing
Should Be
A Complete
System
2 & 3 Closed 100 MV
or More
B Thermopile
Output
1 & 2 Open Greater Than
325 MV
C System
Resistance
2 & 3 Closed 2.5 Ohms
Table 13
WARNING
•
Do not operate appliance with the glass panel
removed, cracked, or broken. Do not remove
glass door while the insert is hot. Replacement
of the glass door should be done by a qualified
service technician.
•
Handle glass door with extreme care! The glass
door assembly is susceptible to damage. Do not
scratch while handling or while reinstalling.
IMPORTANT
Do not use abrasive cleaners on glass. Never clean
the glass when it is hot.
Glass Maintenance
Thermocouple
Thermopile
Pilot
Nozzels
1/8" Min.
(3 mm)
Igniter Rod
Hood
3/8" Min.
(9 mm)
Figure 39 - Proper Pilot Flame Appearance