17
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
WARNINGS• Air shutter adjustment should only be performed by a quali-fied professional service technician.• Ensure front glass panel are in place and sealed during adjustment. CAUTIONS• Carbon 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.

Burner Air Shutter Adjustment Procedure

SUPERIOR® DIRECT-VENT GAS FIREPLACES • MODELS SLDVT-30/35/40/45 • CARE AND OPERATION INSTRUCTIONS
Electronic Appliance Checkout
To light the burner, refer to the lighting instruc-
tions on Page 24. Ensure the igniter lights the
pilot. The pilot flame should engulf the flame
sensor as shown in Figure 17.
ELECTRONIC PILOT ASSEMBLY
Thermocouple
Thermopile
Pilot
Nozzels
SIT MILLIVOLT PILOT ASSEMBLY
3/8" Min.
(9 mm)
Igniter Rod
Pilot Hood
Proper Pilot Flame Appearance
Millivolt Appliance Checkout
The pilot flame should be steady, not lifting
or floating. Flame should be blue in color with
traces of orange at the outer edge.
The top 3/8" (10 mm) at the pilot generator
(thermopile) and the top 1/8" minimum (tip)
of the quick drop out thermocouple should be
engulfed in the pilot flame. The flame should
project 1" (25 mm) beyond the hood at all three
ports (see Figure 16).
To light the burner, refer to the lighting instruc-
tions on Page 22.

Figure 16

Note: If the igniter is damaged, a
replacement kit is available, order
Catalog Number 87L54.
1. Locate adjustment rod and adjust air shutter
to the standard setting as shown in Figure
15 (adjustment rod is located in the lower
control compartment).
Note: Rotating the adjustment rod down
to decrease air and up to increase air.
2. Light appliance (follow lighting procedure
on lighting label in control compartment or
see the lighting instructions, Pages 22 and
24 in this manual).
3. Allow the burner to operate for at least 15
minutes while observing the flame con-
tinuously to ensure that the proper flame
appearance has been achieved (see Figures
12, 13 or 14). 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 flame
appearance is achieved.
• If ame stays lowered blue, adjust the
air shutter, incrementally, to a more
closed position until the proper flame
appearance is achieved.
ELECTRONIC
Pilot
Hood
Sensor
Igniter

Burner Air Shutter Adjustment

Figure 15

Figure 17

Main Burner Factory Air Shutter
Opening Setting
Inches (millimeter)
Model Natural
Gas
Propane
Gas
SLDVT-30/35 1/32
(0.795)
3/16"
(4.763)
SLDVT-40/45 1/32
(0.795)
3/16"
(4.763)
Adjustment
Rod Up
(Fully Open
Position)
Air Shutter
Adjustment Rod Down min.
air opening position)
Burner
Tube
Adjustment Set-Screw
Ref. Air shutter Patent:
U.S. Pat. 5,553,603
4. Leave the control knob (off/pilot/on) in the
ON position and the burner OFF/ON switch
OFF (and remote switches, if applicable).
5. When satisfied that the burner flame ap-
pearance is normal, close the lower control
compartment door (see Figures 12, 13 and
14 on Page 16).