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106442
MDVFST DIRECT-VENT GAS FIREPLACE
®
INSTALLATION
Continued
BURNER REMOVAL
CAUTION: Before proceeding,
make sure the entire unit is cool.
1. Remove the top and bottom louvers
and screen. Open the glass door (left
or right side).
2. Carefully remove the log set.
3. Remove the screw that attaches the
burner to the bracket.
4. Slide the burner towards the front of the
unit, lift, and remove from the firebox.
5. To reinstall the burner, slide the burner
towards the rear of the unit and secure
burner to bracket with screw.
CAUTION: Make certain the
orifice is inside the venturi tube's
air shutter, see Figure 49.
6. Replace the log set, close door with
latches, and attach screen and louvers.
DECORATIVE FACING
Any noncombustible material may be used
for facing (glass, tile, brick, etc.) as long as
the proper clearances are observed (see
Clearances, page 3).
IMPORTANT:
Lou-
vered openings must not be obstructed, and
upper and lower panels must remain remov-
able for servicing. Use only heat-resistant,
noncombustible mortar or adhesive when
securing facing material.
Note:
Combustible material, such as wood,
that has been fireproofed is not considered
noncombustible.
PILOT ASSEMBLY
ADJUSTMENT
The pilot assembly is factory preset for the
proper flame height. Alteration to these set-
tings may have occurred during shipping and
handling. If this is the case, some minor
adjustment may be necessary and should be
done by a qualified technician. To access the
pilot assembly, the glass door must be opened.
The proper settings for the thermopile height
should be at a distance of 3/8" to 1/2" from the
pilot flame as shown in Figure 48.
BURNER FLAME
ADJUSTMENT
Figure 48 - Correct Pilot Flame Pattern
The air shutter, located at the underside of the
main burner (see Figure 49), has been factory
preset to the proper air-to-gas ratio which
results in an even, clean burning flame across
the burner (see Figure 50). If readjustment is
necessary, you can restore the proper air-to-
gas ratio by loosening the air shutter screw
and rotating the air shutter until the proper
flame setting is achieved (see page 22, col-
umn 2 for proper shutter settings). Do not
forget to retighten the air shutter screws.
Figure 50 - Burner Flame Patterns
CORRECT
INCORRECT
CLOSE
SHUTTER
INCORRECT
OPEN
SHUTTER
Short, Sharp,
Blowing Flame
Long, Blue Flame
with Yellow Tips
Long, Uneven,
Yellow Flame
1/8"
(3mm)
3/8" - 1/2"
(9.5mm-12.3mm)
Figure 49 - Connecting Venturi and Orifice
Air Shutter
Orifice
Burner
Firebox Bottom
Venturi
Tube
Burner Gas Line
OPERATING
GUIDELINES AND
MAINTENANCE
INSTRUCTIONS
When lit for the first time, the appliance may
emit a slight odor for about 16 - 24 hours.
This is normal and is due to the “curing” of
the logs and the “burn-in” of internal paints
and lubricants used in the manufacturing
process. Keep compartments, logs, burners,
and area surrounding the logs clean by vacu-
uming or brushing at least twice a year.
Temporary removal of the log set may ease
the cleaning of the burner and pilot assem-
bly. In cleaning, take care not to alter the
pilot or burner location. Be sure appliance is
cool before each maintenance session.
CAUTION: The appliance and
logs can get very hot - Handle
only when cool.
WARNING: Do not operate
appliance with panel(s) and glass
removed, cracked, or broken. Re-
placement of the panel(s) should
be done by a licensed, qualified
service person.
WARNING: Make certain wires
and gas lines are not touching
the underside of the firebox.
Any household glass cleaner may be used to
clean the glass panel. Do not use abrasive
cleaners as this may damage the glass. Clean
glass only when cool.
WARNING: Turn off gas and
wall switch before servicing ap-
pliance. Any safety screen or
guard removed for servicing the
appliance must be replaced prior
to operating the appliance.