Front Glass Enclosure Panel, Removal And Installation; Burner Adjustments; Flame Appearance And Sooting; Adjustment - Superior DT-400 Homeowner's Care And Operation Instructions Manual

Front Glass Enclosure Panel, Removal
and Installation.
WARNING: NEVER OPERATE THE AP-
PLIANCE WITHOUT THE FRONT GLASS
ENCLOSURE PANEL IN PLACE AND SE-
CURE. DO NOT OPERATE APPLIANCE
WITH FRONT GLASS CRACKED, BRO-
KEN OR MISSING. REPLACEMENT MUST
BE DONE BY A LICENSED OR QUALIFIED
SERVICE TECHNICIAN.
These are direct-vent appliances. They are
designed to operate only when the front glass
enclosure panel is installed. Generally the
front glass enclosure panel should not be
removed except to gain access to the compo-
nents within the firebox, and the appliance
may only be operated without the front glass
enclosure panel in place for very brief periods
of time during appliance checkout and adjust-
ment. Be sure that the flame appearance will
be diminished while the front glass enclosure
panel is removed.
WARNING: HANDLE THIS GLASS WITH
EXTREME CARE! TEMPERED GLASS IS
SUSCEPTIBLE TO DAMAGE – DO NOT
SCRATCH OR HANDLE ROUGHLY WHILE
REINSTALLING THE GLASS DOOR
FRAME.
Latch
Bottom Vee-flange
Latch
Door Frame
Firebox Floor
Figure 5
6
Refer to Figure 5 and remove the front glass
enclosure panel as follows:
1. Remove the top louver or radiant panel.
2. Open the hinged drop-down control com-
partment panel.
WARNING: NO NOT ATTEMPT TO SUB-
STITUTE THE MATERIALS USED ON THIS
DOOR, OR REPLACE CRACKED OR BRO-
KEN GLASS WITH ANY MATERIALS
OTHER THAN THOSE PROVIDED BY THE
APPLIANCE MANUFACTURER.
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.
3. Locate the two (2) latches at the top of the
control compartment and disengage them from
the door frame bottom Vee-flange, pulling
down on their handles to open them.
4. Swing the bottom of the door out and raise
it slightly to lift the top flange of the door frame
away from the appliance.
To install the front glass enclosure panel,
proceed as follows:
1. Retrieve the glass door frame. Visually
inspect the gasket on the backside of the
panel. The gasket surface must be clean, free
of irregularities and seated firmly.
Top Flange
Door Frame
2. Position the door frame in front of the
firebox opening and engage the top flange
Glass Door
over the lip at the top of the firebox opening.
3. Swing the door down and back. Ensure the
gasket seats evenly as the door draws shut.
Engage the Vee-flange at the bottom of the
door with the latches and close the latches to
secure the door.
4. Reinstall the top louver or radiant panel.

Burner Adjustments

The following paragraphs address burner ad-
justment concerns and procedures.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Flame Appearance and Sooting

Proper flame appearance is a matter of taste.
Generally most people prefer the warm glow of a
yellow to orange flame. Appliances operated with
air shutter openings that are too large will exhibit
flames that are blue, transparent and much smaller
than designed. These weak, blue and transparent
flames are termed anemic. If the air shutter open-
ing is too small sooting may develop.
Sooting is indicated by black puffs developing
at the tips of very long orange flames. Sooting
results in black deposits forming on the logs,
appliance inside surfaces and on exterior sur-
faces adjacent to the vent termination.
Sooting is caused by incomplete combustion in
the flames and a lack of combustion air entering
the air shutter opening. To achieve a warm
yellow to orange flame with an orange body that
does not soot, the shutter opening must be
adjusted between these two extremes. No
smoke or soot should be present. Reposition
the logs if the flames impinge on any of them.
If the logs are properly positioned and sooting
conditions exist, the air shutter opening on the
main burner tube should be adjusted. Nor-
mally, the more elbows and horizontal runs
there are in the vent system, the greater the
need for the air shutter to be opened further.
WARNING: AIR SHUTTER ADJUSTMENT
SHOULD ONLY BE PERFORMED BY A
QUALIFIED PROFESSIONAL SERVICE
TECHNICIAN.
ENSURE THAT THE FRONT GLASS PANEL IS IN
PLACE AND SEALED DURING ADJUSTMENT.

Adjustment

CAUTION: THE ADJUSTMENT ROD AND
NEARBY APPLIANCE SURFACES ARE HOT.
EXERCISE CAUTION TO AVOID INJURY WHILE
ADJUSTING FLAME APPEARANCE.
To adjust the flame, move the adjustment rod
(located in the lower control area) up or down
to increase or reduce the air shutter opening
respectively. Initially, always position the air
shutter to the factory setting (the minimum air
opening position as shown in Figure 6, on
page 7 . This can be done by pulling the
adjustment rod all the way down.