97-6642 • HOTSY 781SS, 871SS, 921SS • REV. 7/06
9
PRESSURE
W
ASHER
OPERA
TOR’S MANU
AL
Oil burner
burner air adjustment:
The oil burner on this machine
is preset for operation at altitudes below 3000 feet. If
operated at higher altitudes, it may be necessary to adjust
the air shutter and air band setting. Adjust the air shutter
for a #1 or #2 smoke spot on the Bacharach scale.
To adjust, start machine and turn burner ON. Loosen
two locking screws found in the air shutter openings
and close air shutter until black smoke appears from
burner exhaust vent. Note air shutter position. Next,
slowly open the air shutter until white smoke just starts
to appear. Turn air shutter halfway back to the black
smoke position previously noted. Tighten locking screws.
If the desired position cannot be obtained using only the
air shutter, lock the air shutter in as close a position as
can be obtained, then repeat the above procedure on the
air band setting.
CAUTION: If white smoke appears from burner
exhaust vent during start-up or operation, discontinue
use and readjust air bands.
NOTE: If a flue is installed, have a professional ser-
viceman adjust your burner for a #1 or #2 smoke spot
on the Bacharach scale.
inStaLLatiOn inStructiOnS
Figure 3 - Burner Adjustment
10
8
6
4
2
air Shutter Locking Screw
air Shutter
air band
air band
Locking Screw
air Shutter
Locking Screw
Summary of Contents for 781SS
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