32
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
WARNING
•
Air shutter adjustment should
only be performed by a quali-
fied professional service tech-
nician.
•
Ensure front glass panel are
in place and sealed during
adjustment.
CAUTION
•
Soot will be produced if the
air shutter is closed too much.
Any damage due to sooting,
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.
1
. Refer to
Figures 59, 60 and 61
for proper
flame appearance. To adjust the flame, rotate
the adjustment rod toward the back or toward
the front of the fireplace (rod located in the
lower control area). Position the air shutter
to the factory setting as shown in the table
in
Figure 62
.
2.
Light appliance (follow lighting procedure
on lighting label in control compartment or
see the Care and Operation Manual).
3.
Allow the burner to operate for at least 15
minutes while observing the flame continu-
ously to ensure that the proper flame ap-
pearance has been achieved
.
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 appear-
ance is achieved.
4.
(Millivolt Models) 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 appear-
ance is normal, re-install the lower control
compartment door then proceed to finish
the installation.
Figure 61
40"
Model
45"
Model
Figure 60
Burner Flame Adjustments
Figure 62
Air Shutter
Opening
Burner
Venturi
Tube
Air
Shutter
Door
Orifice
Increase
Air Shutter
Opening
Decrease
Air Shutter
Opening
Air Shutter
Adjusting
Arm
Main Burner
Factory Shutter Opening Setting
Models
Natural Gas
inches (mm)
Propane Gas
inches (mm)
40"
1/8 (3.2)
3/8 (9.5)
45"
Installation and Operation Instructions
900357-00, 06/2015
Innovative Hearth Products
Superior
TM
DRT40 Direct Vent Gas Fireplace
