Lennox International Inc. MERIT PLUS MPB3530CNM-B - Manual (Page 19)

19
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT PLUS ® B-VENT GAS FIREPLACES (MPB33/35/40/45) • INSTALLATION INSTRUCTIONS
STEP 10. REMOVING AND INSTALLING
THE GLASS DOOR
Air Shutter Adjustment Guidelines
Amount of
Primary Air
Flame
Color
Air Shutter
Adjustment
If air shutter is
closed too far Flame will
be orange Air shutter
gap should be
increased
If air shutter is
open too far Flame will
be blue Air shutter
gap should be
decreased
STEP 11. BURNER ADJUSTMENTS
Flame Appearance and Sooting
Proper fl ame appearance is a fl ame that is
blue at the base and becomes yellowish-
orange in the body of the fl ame.
When the appliance is fi rst lit, the entire
fl ame may be blue and will gradually turn
yellowish-orange during the fi rst 15 minutes
of operation. If the fl ame remains blue, or if
the fl ame is orange with evidence of sooting
(black tip), the air shutter opening may need
to be adjusted.
If the air shutter opening is closed too far,
sooting may develop. Sooting is indicated
by black puffs developing at the tips of very
long orange fl ames. Sooting results in black
deposits forming on the logs, appliance
inside surfaces and on exterior surfaces
adjacent to the vent termination.
Sooting is caused by incomplete combustion
in the fl ames and lack of combustion air
entering the air shutter opening. To achieve
a warm yellowish-orange fl ame with an
orange body that does not soot, the shutter
opening must be adjusted between these two
extremes.
Air Shutter Adjustment Guidelines
• If there is smoke or soot present, fi rst
check the log set positioning to ensure
that the fl ames are not impinging on
any of the logs. If the log set is properly
positioned and a sooting condition still
exists, then the air shutter opening should
be increased.
• The more offsets in the vent system, the
larger the air shutter opening will need
to be.
• An appliance operated with the air shutter
opened too far, may have fl ames that
appear blue and transparent. These weak,
blue and transparent fl ames are termed
anemic.
• Propane models may exhibit fl ames
which candle or appear stringy. If this is
present and persists, adjust the air shutter
to a more closed position, then operate
the appliance for a few more minutes to
ensure that the fl ame normalizes and the
fl ames do not appear sooty.
Note: The following chart is provided to aid you
in achieving the correct air shutter adjustment
for your installation.
Removing the Glass Enclosure Panel
(see Figure 29)
Remove the top louver assembly. Open
the lower control compartment door (see
Figure 29 ) by pressing in simultaneously at
the left and right top corners of the door (the
door is hinged at the bottom).
Remove the bottom compartment door by
sliding the hinge pin, located at the door’s left
side, to the right until it disengages from the
left corner post hole. Pull the door diagonally
to the left, away from the fi replace.
Locate the latch at the top of the control
compartment and disengage it from the door
frame bottom vee-fl ange, pulling down on the
handle to open it.
Installing the Glass Enclosure Panel
(see Figure 29)
Retrieve the glass door. Visually inspect the
gasket on the backside of the frame. Gasket
surface must be clean, free of irregularities
and seated fi rmly.
Position the door in front of the fi rebox
opening with the bottom of the door held
away from the fi replace (see Figure 29).
Hook the top fl ange of the door frame over
the top of the fi rebox frame.
Let the bottom of the door frame swing
gently in towards the fi replace ensuring
that the gasket seats evenly as the door
frame draws shut. Fasten the latch located
underneath the fi rebox fl oor to the door's
vee-fl ange. Close the latch securely.
Top Flange on
Glass Door
Bottom Vee-fl ange
Glass Door
Glass Door
Firebox Floor
Latch
Figure 29: Installing or Removing
Glass Door
NOTE: When installing the glass door, ensure
the spacing on both sides are equal.
Only doors certifi ed with the appliance
shall be used.
Seules des portes certifi ées pour cet
appareil doivent être utilisées.
WARNING: DO NOT abuse glass door by
striking or slamming shut.
WARNING
• Do not attempt to substitute
the materials used on the
door, or replace cracked or
broken glass.
• Handle this glass with
extreme care! Glass is
susceptible to damage – Do
not scratch or handle roughly
while reinstalling the glass
door frame.
• The glass door of this
appliance must only be
replaced as a complete
unit as provided by the
manufacturer. Do not attempt
to replace broken, cracked or
chipped glass separately.
• Do not attempt to touch
the front enclosure glass
with your hands while the
fi replace is in use.
WARNING
Do not operate appliance with
the glass front removed, cracked
or broken.
AVERTISSEMENT
Ne pas utiliser l'appareil si le
panneau frontal en verre n'est
pas en place, est craqué ou
brisé.