21
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT
®
SERIES B-VENT GAS FIREPLACES • 36" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
Maintenance Schedule
Annually
(Before the onset of the Burning Season)
MAINTENANCE TASK
ACCOMPLISHING PERSON
PROCEDURE
Inspecting/Cleaning Burner, Logs
and Controls
Qualified Service Technician
Inspect valve and ensure it is properly operating. Check piping
for leaks. Vacuum the control compartment, fireplace logs and
burner area.
Check Flame Patterns and Flame Height Qualified Service Technician
Refer to
Figure 14
and verify the flame pattern and height
displayed by the appliance conforms to the picture. Flames
must not impinge on the logs. Ensure flames are steady (not
lifting or floating).
Inspecting/Cleaning Pilot and Burner
Qualified Service Technician
Refer to
Figures 16 and 17
. Remove any surface build-up on
pilot and burner assembly. Wipe the pilot nozzles, igniter/
flame rod and hood. Ensure the pilot flame engulfs the flame
sensor as shown.
Checking Vent System
Qualified Service Technician
Inspect the vent system at the top and at the base (within the
firebox) 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 &
fittings (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
Qualified Service Technician
Perform the appropriate appliance checkout procedure detailed
in this manual.
Replacing Glowing Ember (rockwool)
Materials
Homeowner/Qualified Service
Technician
Remove old ember materials and vacuum the area for placement
of glowing embers (rockwool). Place new glowing embers as
described in this document.
Periodically
(After the Burning Season)
MAINTENANCE TASK
ACCOMPLISHING PERSON
PROCEDURE
Cleaning Firebox Interior
Homeowner
Carefully remove logs, glowing embers (rockwool), and volcanic
stone, if used. Vacuum interior of the firebox. Clean firebox walls
and log grate. Replace logs, glowing embers (rockwool), and
volcanic stone, as detailed in this manual.
Check Flame Patterns and Flame Height Homeowner
Refer to
Figure 14
and verify the flame pattern and height dis-
played 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
firebox) for signs of blockage or obstruction. Look for any signs
of dislocation of the vent components.
Cleaning Optional Glass Doors
Homeowner
Clean as necessary following the directions provided in this
manual.
DO NOT TOUCH OR ATTEMPT TO CLEAN THE GLASS
WHILE HOT
.
