Installation
900994-00K, 07/2021
Innovative Hearth Products
DRL2000 & DRL3500 Series Direct-Vent Gas Fireplaces
48
Table 24 - 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
Rod Down
(Fully-Open
Position)
Burner
Tube
Adjustment
Rod Up
(Fully-Closed
Position)
Adjustment
Set-Screw
Figure 38 - Air Shutter Adjustment Rod
Figure 39 - Burner Flame Appearance
Table 25 - Main Burner Shutter Opening—Factory Setting
Models
Natural Gas
Propane/LP Gas
All
1/4” (6.35 mm)
1/2” (13 mm)
1
. Move the adjustment rod down to increase air flow and up to decrease it. The rod is located in the lower control
compartment. Position the air shutter to the factory setting
(
Table 25
).
2
. Light the fireplace. Follow the lighting procedure on the lighting label in the control compartment or
Pages 67-70
.
3
. Allow the burner to operate for at least fifteen (15) minutes while observing the flame continuously to ensure that the
proper flame appearance is achieved
(
Figure 39
).
If the following conditions are present, adjust accordingly.
• If flame appears sooty, adjust the air shutter, incrementally, to a more open position until the proper flame appearance
is achieved.
• If flame remains blue, adjust the air shutter, incrementally, to a more closed position until the proper flame appearance
is achieved.
4
. When satisfied that the burner flame appearance is normal. Turn fireplace to the off position, and reinstall the screen
barrier assembly, then proceed to finish the installation.
DRL2035, DRL3535, DRL3545 & DRL3555
DRL2045 & DRL2055
f i r e - p a r t s . c o m
