NOTE: DIAGRAMS AND ILLUSTRATIONS ARE REPRESENTATIVE AND ARE NOT DRAWN TO SCALE.
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31
LENNOX HEARTH PRODUCTS • RHAPSODY™ LINEAR DIRECT-VENT GAS FIREPLACES (MODEL RHAP54N) • INSTALLATION INSTRUCTIONS
WARNINg
•
Air shutter adjustment should
only be performed by a qualified
professional service technician.
•
Ensure front glass panel is in
place and sealed during adjust-
ment.
CAUTION
•
Soot will be produced if the air
shutter is closed too much. Any
damage due to sooting resulting
from improperly setting the air
shutter is not covered under the
warranty.
•
The air shutter door and nearby
appliance surfaces are hot. Exer-
cise caution to avoid injury while
adjusting flame appearance.
AdjUSTINg THE AIR SHUTTER
Note: Before adjusting the air
shutter, the glass door assembly
must be in place and secured.
flame Appearance and Sooting
Proper flame appearance is a flame that is blue
at the base and becomes yellowish-orange in
the body of the flame. When the appliance is
first lit, the entire flame may be blue and will
gradually turn yellowish-orange during the first
30 minutes of operation. After 30 minutes of
operation, if the flame is blue, or if the flame 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 flames. Sooting results in black depos-
its forming on the appliance inside surfaces
and on exterior surfaces adjacent to the vent
termination.
Sooting is caused by incomplete combustion in
the flames and lack of combustion air entering
the air shutter opening. To achieve a warm
yellowish-orange flame 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, first ensure
that the flames are not impinging on any of
the panels. If the panels are properly posi-
tioned and a sooting condition still exists,
increase the air shutter opening.
• 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 flames that appear
blue and transparent.
• Propane models may exhibit flames that
candle or appear stringy. If this is present
and persists, adjust the air shutter to a more
OPEN position, then operate the appliance for
a few more minutes to ensure that the flame
normalizes and the flames do not appear
sooty.
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
Air Shutter Adjustment Procedure
To adjust the air shutter for proper flame
appearance (as illustrated in Figure 31-1):
1. Before adjusting the air shutter, allow the
burner to operate for at least 30 minutes
while observing the flame.
2. Adjust the air shutter using the lever on the
lower right side of the firebox (Figure 31-2).
•
for more OPEN air shutter, PULL
lever OUT (toward front of fireplace).
•
for more CLOSEd air shutter, PUSH
lever IN (toward back of fireplace).
• If the flame appears sooty, adjust the air shut-
ter until proper flame appearance is achieved.
• If the flame stays blue, gradually adjust the
air shutter to a more CLOSED position until
proper flame appearance is achieved.
Figure 31-1: Proper Flame Appearance
Figure 31-2
The following chart is provided to aid you in
achieving the correct air shutter adjustment
for your installation:
Air Shutter Adjustment Lever
(Below door assembly)
[DETAIL]
VERIfyINg APPLIANCE OPERATION
(CONTINUEd)
If optional Bezel and Surround are installed,
the Bezel must be removed (Page 28 ) to
access the Air Shutter Adjustment Lever.
Also remove the Surround, if necessary (Page 33 ).
