36
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.
Burner Adjustment
Installation and Operation Instructions
900300-00, 01/2018
Innovative Hearth Products
DRT35ST and DRT35PF Direct-Vent Gas Fireplaces
1
. Refer to
Figure 63
for proper flame ap-
pearance. 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 64
.
2.
Light appliance (follow lighting procedure
on lighting label in control compartment or
see the Installation 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.
Vermiculite
Figure 63 -
Burner Flame Appearance
• If flame appears weak or sooty, adjust
the air shutter, incrementally, to a more
open position until the proper flame ap-
pearance 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.
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.
