Damper Adjustment; Shutter Adjustment - Quadra-Fire Direct Vent Room Heater 839-1390 Owner's Manual

K. Damper Adjustment
FOR TOP OR REAR VENT INSTALLATIONS
See vent graph for recommendations on page 11 before
you begin your adjustment. If your installation falls within
the range of the gray shaded area of graph, it may be
necessary to make an adjustment to the vertical damper to
improve the flame appearance in your appliance.
Damper Adjustment Plate
TOP VENT INSTALLATIONS:
Figure 8.27
adjustment control at the rear of the appliance behind the
rear vent access plate.
Damper Adjustment Plate
REAR VENT INSTALLATIONS:
Figure 8.28
adjustment control on the top of the appliance beneath the
grille plate.
Make adjustment:
Let appliance warm up before adjusting.
Loosen screws using a Phillips head screwdriver.
Pivot the vertical damper adjustor in 1/4 in. (6mm) incre-
ments while observing the flame activity.
Turning clockwise to open damper = less flame height and
more blue in flame color.
Turning counterclockwise to close damper = increased flame
height and more yellow in flame color.
September 1, 2008
Rear Access Plate
Locate the damper
Outer Cover Plate
Locate the damper
Quadra-Fire · Sapphire · 250-7233H
Make adjustment until flame size and activity suits your per-
sonal preference, and then retighten screws on adjustment
control.
Reattach the rear vent access plate (rear vent) OR the grille
plate (top vent).
NOTE: In the Commonwealth of Massachusetts, the word
damper shall be replaced with the words flue restrictor.
L. Shutter Adjustment
OPEN
The shutter is located on the underside of the
Figure 8.29
appliance, on the right side. To adjust the shutter, loosen
the wingnut. Retighten the wingnut after adjustment.
Moving the shutter bolt to the right closes the shutter. Moving
the shutter bolt to the left, will open the shutter. Opening the
shutter causes flames to become shorter and blue. Closing
the shutter creates taller orange/yellow flames.
NOTE: Do not close so much as to cause a sooty flame.
Improper adjustment can cause sooting in the firebox and/or
on the outside of a house with a horizontal termination.
After adjustment, tighten nut to lock in place.
CLOSE
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