Hearthstone Quality Home Heating Products, Inc.
Bristol Model 8762
32
Some conditions cannot be corrected through air
shutter adjustment; an adjustment must be made to
the gas supply pressure or by changing the
restriction plate setting. Qualified service personnel
must perform supply line/manifold gas line pressure
adjustments and restrictor plate adjustments. Do not
attempt to complete any part of the installation or
adjustment of this unit unless technically qualified.
Air Shutter Adjustments
WARNING: THE ADJUSTING STUDS ARE HOT!
WARNING: THE AIR SHUTTERS ARE FACTORY
SET AND ONLY A QUALIFIED GAS TECHNICIAN
SHOULD MAKE ADJUSTMENTS.
The air shutters are adjustable while the stove is
burning. Move the shutter left or right to adjust the
flame pattern.
See Figures 30 and 31.
Move the
shutter towards the valve to open the air shutter, and
away to close the shutter. When the flame pattern is
correct, tighten the set nut without letting the shutter
move.
Figure 29 - Air Shutters Closed
Figure 30 - Air Shutters Opened
Note:
Very little movement is needed to substantially
change the burn and flame patterns. Some
conditions cannot be corrected through air shutter
adjustment; an adjustment must be made to the gas
supply pressure. Supply line/manifold gas line
pressure adjustments must be performed by
qualified service personnel. Do not attempt to
complete any part of the installation or adjustment of
this unit unless technically qualified to do so.
Burner Flame Appearance
Once the unit is lit, observe the flame pattern and
adjust as necessary. Also, a periodic visual check of
the burner flame should be performed. The burner
flames can be adjusted by means of the air shutter.
To determine if the burner flame needs adjustment,
it is necessary to view the flame pattern with the
valve output at its highest setting. Allow the unit to
operate for 10 minutes enabling the entire unit to
reach temperature and for the flame pattern to
stabilize. The flame pattern should be similar to the
one shown in Photo 9. There are several guidelines
to aid in determining if the flame pattern is correct:
1. The flame should not be dirty, smoky, sooty, or
lick the top of the stove.
2. The flame should not rise off the burner; this is
called “lifting”.
3. Flames should not impinge heavily on the log
set. They sho
uld “fit” through the pre-formed
spaces designed in the log set.
Photo 9
– Typical Burner Flame Appearance
Daily Operation
Your Bristol gas-fired heater is easily operated once
installed
and
adjusted
by
qualified
service
personnel.
The
unit
is
controlled
via
the