Adjusting The Air Shutter - Lennox Hearth Products Rhapsody RHAP42N Installation Instructions Manual

LENNOX HEARTH PRODUCTS • RHAPSODY™ LINEAR DIRECT-VENT GAS FIREPLACES (MODELS RHAP42N & RHAP54N) • INSTALLATION INSTRUCTIONS
VERIfyINg APPLIANCE OPERATION
(CONTINUEd)

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 enter-
ing 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.
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.
32
Figure 53: Proper Flame Appearance
If optional Bezel and Surround are installed,
the Bezel must be removed (Page 29) to
access the Air Shutter Adjustment Lever.
Also remove the Surround, if necessary (Page 33 ).
Figure 54
The following chart is provided to aid you in
achieving the correct air shutter adjustment
for your installation:
Air Shutter Adjustment guidelines
Amount of flame
Primary Air Color
If air shutter is flame will
closed too far be orange
If air shutter is flame will
open too far be blue
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.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Air Shutter Adjustment Lever
(Below door assembly)
Air Shutter Adjustment Procedure
To adjust the air shutter for proper flame
appearance (as illustrated in Figure 53):
1. Before adjusting the air shutter, allow the
burner to operate for at least 30 minutes
Air Shutter
while observing the flame.
Adjustment
2. Adjust the air shutter using the lever on the
Air shutter
lower right side of the firebox (Figure 54).
gap should be
increased
• for more CLOSEd air shutter, PULL
Air shutter
lever OUT (toward front of fireplace).
gap should be
• for more OPEN air shutter, PUSH
decreased
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.
[DETAIL]