10
LENNOX HEARTH PRODUCTS • MERIT
®
SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • CARE AND OPERATION
MAINTENANCE
(See Maintenance Schedule,
Page 24)
Refer to the maintenance schedule for maintenance
tasks, procedures, frequency and by whom they
should be performed. Always verify proper opera-
tion of the appliance after servicing.
Replacing Contemporary Media
If the contemporary media become damaged
by accident or improper handling and need
replacement, use only the proper replacement
contemporary media from manufacturer (see
Pages 27
for ordering information).
Reinstall Contemporary Media
Carefully follow placement instructions on
Pages 12 through 14
. All contemporary media
should be installed as shown, to ensure a
proper flame and safe combustion.
Inspect Wiring
Refer to wiring diagrams on
Page 16.
CAUTION: Label all wires prior to discon-
nection when servicing controls. Wiring
errors can cause improper and dangerous
operation. Verify proper operation after
servicing.
ATTENTION: Au moment de l'entretien
des commandes, étiquetez tous les fils
avant de les débrancher. Des erreurs
de cáblage peuvent entraîner un fonc-
tionnement inadéquat et dangereux.
Inspect and clean all wire connections. Ensure
that there is no melting or damage. Inspection
should include:
• Terminals at the Valve
• Rocker Switch
•
Optional Control Switch (Wall ON/OFF
Switch, Unit-Mounted ON/OFF Switch, or
Remote ON/OFF Control System)
Inspect Burner Flame and Pilot Flame
Appearance
Periodically do a visual check of the burner
flame and the pilot flame. Ensure that the
burner flame appearance resembles the flame
shown in
Figure 7
and as described in Flame
Appearance and Sooting on
Page 14
. Refer
to
Figures 9 and 10
on
Page 15
for more
information about the pilot flame appearance.
Contact a qualified service technician at once
if any abnormal condition is observed.
Small Area Paint Touch-up
Only use a factory supplied paint kit for touch-
ups. Paint is available at your local Lennox
Hearth Products dealer. Never attempt to paint
a hot fireplace.
If the surface later becomes stained or marred,
it may be lightly sanded and touched up with
spray paint.
CAUTION: Wear gloves and safety glasses
for protection while doing required
maintenance.
Verify proper operation after servicing.
S'assurer que l'appareil fonctionne adé-
quatement une fois l'entretien terminé.
Always turn off gas to the pilot (millivolt
appliances) before cleaning. Before re-
lighting, refer to the lighting instructions
in this manual. Instructions are also found
on a pull-out panel located in the control
compartment.
Always keep the appliance area clear
and free from combustible materials,
gasoline and other flammable liquids.
Inspect Venting System
The appliance and venting system should be
thoroughly inspected before initial use and
at least annually by a qualified service techni-
cian (inspection should include ensuring that
exhaust or intake passages are unobstructed
and vent components are properly assembled
and not damaged).
Homeowner must contact
a qualified service technician at once if any
abnormal condition is observed.
If the venting system is disassembled for any
reason, a qualified service technician should
follow vent installation instructions for proper
reassembly and proper sealing of the venting
system components. However, more frequent
periodic inspections and cleanings should be
performed by the homeowner.
Cleaning Glass
(see Front Glass Enclosure Panel, Removal and
Installation on
Page 11
).
NOTE:
Clean glass after first two weeks of
operation (after Burn-In period is over) and then
only when necessary and when the fireplace is
cool. Wipe surface with clean, dampened, soft
cloth. Follow with a dry, soft towel as desired.
Take care not to scratch the glass surface.
WARNING: Do not use abrasive cleaners
on glass. Never clean the glass when it
is hot.
The viewing glass should be cleaned periodi-
cally to remove any build-up caused from the
following:
• During start-up, it is normal for condensa
-
tion to form on the inside of the glass (this
condensation and fog will usually disappear
in a few minutes). The moisture can cause
lint, dust and other airborne particles to cling
to the glass surface.
• Initial curing of the high temperature paint
and burning off of lubricants used in the
manufacturing process may result in a film
on the glass.
• A white coating may form on the glass as a
result of impurities and minerals in the fuel.
It is recommended that the glass be cleaned
two or three times during each burning season,
depending on the circumstances present. The
following cleaning solutions are approved for
use to clean glass:
• Non-ammonia based household cleaner
• 50%-50% mix of white vinegar and water
• Gas fireplace/stove glass cleaner
Inspect Glass Gasket
- Visually inspect the
gasket on the backside of the glass enclosure
panels. The gasket surface must be clean, free
of irregularities and seated firmly.
Clean Control Compartment
Keep control compartment clean by vacuuming
or brushing at least twice a year. More frequent
cleaning may be required due to excessive lint
from carpeting, bedding materials, etc. It is
important that control compartments, burners
and circulating air passageways of the appliance
be kept clean.
Clean Contemporary Media And Burner
Carefully remove contemporary media. Vacuum
out any foreign matter (lint, carbon, etc.)
on the burner. Ensure the burner ports are
“open.” Remove any carbon deposits from the
under side of the contemporary media using a
vacuum cleaner, or a soft bristled brush (e.g.,
paint brush).
NOTE:
Improper positioning of contemporary
media can create carbon build-up and will alter
the performance of the appliance.
WARNING
Turn off gas and electrical power
to the fireplace and allow it to
cool before cleaning or servicing
the appliance.
