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Level the unit from side to side and from front to rear. If the
furnace is not level, place fireproof wedges or shims be
tween the low side of the furnace and the floor. Make sure
the weight of the furnace is distributed evenly on all four
corners. Strain on sides of cabinet causing cracking and
popping noises may occur if weight of furnace is not evenly
distributed.
Adjustments
Neither the nozzle setting nor the air adjustments are fac
tory set. The furnace is fire-tested and the limit control is
checked to make sure it functions properly; no factory set
tings are made. During installation, the furnace must be
“set up.” The installing dealer/contractor must have and
use proper test equipment in order to correctly set up the
oil furnace. Proper testing equipment is required to ensure
correct operation of the unit. The use of test equipment is
now more critical than ever due to tighter tolerances need
ed to keep the furnace operating efficiently.
Among the test equipment for an oil furnace, the proper
combustion test kit should contain the following:
S
Draft gauge
S
CO
2
or O
2
analyzer
S
Smoke tester
S
Pressure gauge
S
High temperature thermometer
S
Beckett T-501 nozzle gauge
S
Oil vacuum gauge
S
Knowledge of proper test equipment operation
CAUTION
Improper nozzle and/or air adjustment of this unit
may result in sooting problems. Refer to the follow
ing section for correct adjustment procedures.
Adjusting the Nozzle
Proper adjustment of the nozzle assembly is critical. Before
the flue pipe and oil lines are installed, the nozzle assembly
must be checked for proper depth and alignment. You must
remove the entire burner assembly (not just the nozzle) from
the furnace to check the nozzle depth and alignment. The
smaller sized firing nozzle has been factory-installed. This
should be verified by the installer. A larger nozzle has been
provided in the bag assembly for use with SLO185UFV 105
and 141 units. Inspect the spark transformer leads also to en
sure they are still attached to the electrodes.
The burner assembly is attached to the vestibule panel by
three nuts. Slots are provided in the mounting flange for re
moving the burner assembly from the vestibule. Loosen
the nuts and turn the whole burner assembly clockwise
(figure 7) to remove the entire burner assembly from the
furnace. There is adequate wire to remove the burner with
out disconnecting wires. Once removed, turn the burner
around in the vest panel area.
Figure 7
SLO185UFV Series Burner Removal
First, loosen three nuts which
attach burner to vest panel.
Next, rotate burner clockwise
on slots then pull toward you.
To check the ignition electrode gap use the T-501 gauge.
The proper gap should be 5/32”.
To check nozzle alignment, again insert the small end of
gauge into the end cone and measure the nozzle and
electrode alignment against the center lines marked on
the gauge (again refer to enclosed illustration sheet). If
the nozzle is not centered, but found to be too far left or
right, a new nozzle assembly will need to be ordered. Do
not attempt to adjust by bending the 90 degree elbow in
the oil line.
Take care to properly re-install burner assembly when
nozzle adjustment has been completed.
Splined Nut
Figure 8
Beckett Oil Burner Nozzle Adjustment
Burner must be removed from
furnace for this procedure.
