Superior Fireplaces DRT4240DEN-B Installation And Operation Instruction Manual page 44

Innovative Hearth Products
DRT4200 Series Direct-Vent Gas Fireplaces
Figure 35A - FRONT Air Shutter Setting
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
4. When satisfied that the burner flame appearance is normal, reinstall the lower control compartment door, then
Table 29 - Main Burner Shutter Opening—Factory Setting
Figure 36 - Burner Flame Appearance
44
Adjustment
Set-Screw
Burner
Tube
Air Shutter
Adjustment
Rod Down
(Fully-Open
Position)
The adjustment rod for the front air shutter is
located in the lower control compartment. See
Table 29 for the standard adjustment setting.
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.
proceed to finish the installation.
Models
All
Figure 35B - REAR Air Shutter Setting
Adjustment
Rod Up
(Fully-Closed
Position)
Closed
Open
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.
Natural Gas
Front Air Shutter Rear Air Shutter
1/16"
(1.6 mm) (3.2 mm)
Rear Air Shutter Adjustment Lever
Front Air Shutter
1/8" 1/8"
(3.2 mm)
Installation
900636-01, 01/2017
Open
Closed
Propane
Rear Air Shutter
1/8"
(3.2 mm)