Lennox Hearth MPD35ST-NM - Manual (Page 17)

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
17
MAINTENANCE TASK ACCOMPLISHING PERSON PROCEDURE
Inspecting/Cleaning Burner, Logs
and Controls
Qualifi ed Service Technician Inspect valve and ensure it is properly operating. Check piping
for leaks. Vacuum the control compartment, fi replace logs and
burner area.
Check Flame Patterns and Flame
Height
Qualifi ed Service Technician Refer to Figure 13 on Page 9 and verify the fl ame pattern and
height displayed by the appliance conforms to the picture. Flames
must not impinge on the logs. Ensure fl ames are steady (not
lifting or fl oating).
Inspecting/Cleaning Pilot and Burner Qualifi ed Service Technician Refer to Figure 15 and Figure 16 on Page 10. Remove any
surface build-up on pilot and burner assembly. Wipe the pilot
nozzles, igniter/fl ame rod and hood. Ensure the pilot fl ame
engulfs the fl ame sensor as shown.
Checking Vent System Qualifi ed Service Technician Inspect the vent system at the top and at the base (within the
fi rebox) for signs of blockage or obstruction. Look for any signs
of dislocation or deterioration of the vent components. Note:
Excessive condensation can cause corrosion of caps, pipe &
fi ttings (excessive condensation can be caused by long lateral
runs, too many elbows and/or exterior portions of the system
being exposed to cold weather). Also inspect wall straps or
plumbers's tape to ensure it is secure and in place.
Appliance Checkout Qualifi ed Service Technician Perform the appropriate appliance checkout procedure detailed
in this manual.
Replacing Rockwool Ember Materials Homeowner/Qualifi ed Service
Technician
Remove old ember materials (rockwool) and vacuum the ember
placement area. Place new embers as described in Step 6 on
Page 8.
Periodically (After the Burning Season)
MAINTENANCE TASK ACCOMPLISHING PERSON PROCEDURE
Cleaning Firebox Interior Homeowner Carefully remove logs, rockwool, volcanic stone and vermiculite.
Vacuum out interior of the fi rebox. Clean fi rebox walls and log
grate. Replace logs, Rockwool and volcanic stone as detailed
in this manual.
Check Flame Patterns and Flame
Height
Homeowner Refer to Figure 13 on Page 9 and verify the fl ame pattern and
height displayed by the appliance conforms to the picture. Flames
must not impinge on the logs.
Checking Vent System Homeowner Inspect the vent system at the top and at the base (within the
fi rebox) for signs of blockage or obstruction. Look for any signs
of dislocation of the vent components.
Cleaning Front Glass Enclosure Panel Homeowner Clean as necessary following the directions provided in this
manual. DO NOT TOUCH OR ATTEMPT TO CLEAN GLASS
WHILE HOT.
Annually (Before the onset of the Burning Season)
MAINTENANCE SCHEDULE