HearthStone Quality Home Heating Products Inc
TUCSON Gas-Fired Direct-Vent
27
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.
To determine if the air shutter needs
adjustment, it is necessary to view the flame
pattern with the variable output control knob
at its highest setting. Allow the unit to
operate for 10 minutes to allow the entire
unit to reach temperature and for the flame
pattern to stabilize. Generally, the more air
(open shutter) in the mixture, the bluer the
flame. Less air (closed shutter) results in a
more yellow flame, but too little air will
result in incomplete combustion, low
efficiency and a dirty burn. There are two
simple guidelines to aid in determining the
correct flame pattern:
1. if the flame at the base of the logs is
completely blue, the air shutter may
be open too far;
2. if the flame is dirty or licks the top of
the stove, the air shutter may be
closed too far.
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
location. 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 to do so.
