Installation
900636-01, 01/2017
Innovative Hearth Products
DRT4200 Series Direct-Vent Gas Fireplaces
44
Figure 35 - Air Shutter Adjustment Rod
1.
Adjust the air shutters per instructions in
Figures 35A and 35B
and
Table 29
.
2.
Light the fireplace. Follow the lighting procedure on the lighting label in the control compartment or
Pages 61-64
.
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 38
)
. If the following conditions are present, adjust accordingly.
• If flame appears weak or 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, reinstall the lower control compartment door, then
proceed to finish the installation.
Figure 36 - Burner Flame Appearance
Table 29 - Main Burner Shutter Opening—Factory Setting
Air Shutter
Adjustment
Rod Down
(Fully-Open
Position)
Burner
Tube
Adjustment
Rod Up
(Fully-Closed
Position)
Adjustment
Set-Screw
Figure 35A - FRONT Air Shutter Setting
Figure 35B - REAR Air Shutter Setting
The adjustment rod for the front air shutter is
located in the lower control compartment. See
Table 29
for the standard adjustment setting.
Closed
Open
Models
Natural Gas
Propane
Front Air Shutter
Rear Air Shutter
Front Air Shutter
Rear Air Shutter
All
1/16”
(1.6 mm)
1/8”
(3.2 mm)
1/8”
(3.2 mm)
1/8”
(3.2 mm)
The adjustment lever for the rear air shutter is located in
the lower control compartment. See
Tables 28 and 29
for
the proper adjustment setting.
Closed
Open
Rear Air Shutter Adjustment Lever
