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Unit Start−Up & Adjustments
Before starting unit, make sure the oil tank is adequately
filled with clean No. 1 or No. 2 furnace oil.
NOTE − Water, rust or other contaminants in oil supply sys-
tem will cause malfunction and failure of the internal parts
of the fuel pump.
Never burn garbage or paper in the heating system.
Never leave papers near or around the unit.
Blower door must be in place before start−up.
1. Set thermostat for heating demand and turn on electri-
cal supply to unit.
2. Check initial air adjustment. All units are equipped with
an air adjustment dial on the right side of the burner.
See burner parts arrangement illustration.
3. Turn unit on. Place a can or container under the bleed
port located on the fuel pump. Loosen nut on bleed
port to release air and oil mixture from fuel line. Allow
mixture to escape until a steady stream of oil is emitted
from the port. Drain at least 1/2 pint of oil from the
pump. Retighten the nut on bleed port. If lockout oc-
curs, press reset button and continue with bleed pro-
cedure.
NOTE − A two−pipe fuel system will normally bleed it-
self by forcing air back to the tank through the return
line. This type of bleeding procedure is not necessary.
4. If burner fails to start, push reset button on primary
safety control and the burner motor reset button. See
part arrangement illustration.
Do not push the reset button on the primary control
more than one time.
5. If the burner fails to light again, refer to the trouble-
shooting section in this manual.
Measuring Fuel Pump Pressure
Measure fuel pump pressure with unit off. Attach pressure
gauge to pump outlet. Turn unit on and check pressure and
compare to table 7. Adjust if necessary.
Measuring Temperature Rise
To measure temperature rise, place plenum thermome-
ters in warm air and return air plenums. Locate thermome-
ter in warm air plenum where thermometer will not see"
the heat exchanger to prevent it from picking up radiant
heat. Set thermostat to its highest setting to start unit. After
plenum thermometers have reached their highest and
steadiest readings, subtract the readings. The difference
in temperatures in the supply and return air plenums
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should approximate the temperature rise range listed in
table 7 and the appliance rating plate. If the rise is above
the range shown in the table, check for high static pres-
sure.
Nozzle Size,
O23V
Spray Angle,
Unit
& Pattern
−70
.50GPH−80° A
−90
.65GPH−80° B
−105
.65GPH−80° B
−120
.75GPH−80° B
−140
.85GPH−80° B
−154
1.0GPH−80° B
Adjusting Limit Control
DO NOT adjust limit control − it is preset at the factory.
Adjusting and Testing Burner
The following instructions are essential to the proper op-
eration of O23V series oil furnaces. To prevent sooting,
these instructions must be followed in sequence:
1. Draft This test should be taken at the breach be-
tween the outlet of the vent connector and the baro-
metric draft control. Generally a 1/4" hole will need to
be drilled for the draft gauge to be inserted into the vent
connector.
A minimum of 0.03 draft must be established without
the burner in operation. With the burner in operation,
the draft should be 0.04 to 0.05. This is VERY critical to
the flame retention head burners.
Oil furnace installations also require careful inspection
to make sure the chimney is in good shape and can ac-
commodate the products of combustion. The temper-
ature in the unconditioned space will also affect the
draft if long vent connectors are allowed to get too
cold.
2. Overfire Draft This test should be taken with the
burner in operation. Remove the screw from the center
of the inspection port. Insert your draft gauge into the
hole.
A reading of the overfire draft should be 0.02 less than
the reading found in the vent connector. If a positive
reading is seen at this point, the combustion fan is
pumping too much air into the heat exchanger. Make
the necessary adjustments at the air adjustment dial.
3. Smoke Test The smoke test should be taken at the
hole drilled in step 1.
Using a smoke test gun adjust the air inlet shutter so
that you will have just a trace of smoke. Somewhere
between a 0 and #1 smoke. This is the starting point.
Do not stop here.
4. CO
Test Again, take this sample at the vent pipe.
2
With the unit firing at a trace of smoke, take a sample
of the CO
. From the results of this test, a window of
2
operation" will be determined. This window of opera-
tion establishes some tolerance. The tolerance the in-
staller builds in provides room within the set-up for
Page 17
Table 7
Input
Output
Pump
Rating
Rating
PSIG
BTU/Hr
BTU/Hr
Head
100
70,000
57,000
FB0
100
90,000
72,000
FB0
140
105,000
84,000
FB3
140
119,000
105,000
FB3
140
140,000
112,000
FB6
140
154,000
125,000
FB6
Temp
Rise
F°
60−70
60−70
65−75
70−80
65−75
70−80
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