Lennox Hearth MLDVTCD-35NM Burner User Manual


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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
WARNINGS
• Air shutter adjustment should
only be performed by a quali-
fied professional service tech-
nician.
• Ensure front glass panel are
in place and sealed during
adjustment.
CAUTIONS
• Soot will be produced if the
air shutter is closed too much.
Any damage due to carboning
resulting from improperly
setting the air shutter is not
covered under the warranty.
• The air shutter door and nearby
appliance surfaces are hot.
Exercise caution to avoid
injury while adjusting flame
appearance.
• Ensure the air shutter setting
is at least equivalent to 1/2
of the air hole exposed when
operating the unit with pro-
pane gas.
Burner Air Shutter Adjustment Procedure
Air Shutter
Burner Tube
Adjustment Set-Screw
Main Burner Factory Air Shutter
Opening Setting - Inches (millimeter)
Model Natural Gas Propane Gas
MLDVTCD-35 (Closed)
Expose Half
Of The Hole
Adjustment Rod Up
(closed min. position)
LENNOXHEARTHPRODUCTS•MERIT
®
SERIESDIRECT-VENTCONTEMPORARYDESIGNGASFIREPLACES•MODELMLDVTCD-35•INSTALLATIONINSTRUCTIONS
Figure 45 - Burner Air Shutter Adjustment
Figure 46 - Burner Flame Appearance Model MLDVTCD-35
1. Locate and adjust the air shutter to the
standard setting as shown in Figure 45.
2. Light appliance (follow lighting procedure
on lighting label in control compartment or
see the Care and Operations manual).
3. Allow the burner to operate for at least 15
minutes while observing the ame con-
tinuouslytoensurethattheproperame
appearance has been achieved (see Figure
46). If the following conditions are present,
adjust accordingly.
•Ifameappearsweakorsooty,adjustthe
air shutter, incrementally, to a more open
positionuntiltheproperameappearance
is achieved.
•Ifamestaysloweredblue,adjusttheair
shutter, incrementally, to a more closed
positionuntiltheproperameappearance
is achieved.
4. Leave the control knob (off/pilot/on) in the
ON position and the burner ON/OFF switch
OFF (and remote switches, if applicable).
5. Whensatisedthattheburnerameappear-
ance is normal, re-install the lower control
compartment door then proceed to finish
the installation.
(River Stone And Beach Sand With Porcelain Panels Shown)
Ref. Air shutter Patent:
U.S. Pat. 5,553,603
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