Installer’s Guide
18
The oil burner was installed in the furnace at the fac-
tory. In the field, if it is necessary to adjust the heat-
ing capacity of the furnace by changing the oil burner
nozzle, refer to the following instructions. Also, consult
the oil burner manufacturer’s operating instructions
(included with the burner) for detailed instructions on
this procedure.
1) The oil nozzle is factory installed in the oil burner.
The gun/electrode assembly with nozzle may be re
-
moved from the rear of the burner assembly with-
out removing the oil burner from the furnace.
To access the gun/ electrode assembly, loosen two
(2) machine screws and clamps holding the burner
ignition transformer in position. Rotate the trans
-
former forward and out of the way.
2) Install an appropriate replacement nozzle of the
correct size, spray angle, and spray type.
3) The furnace may have been handled roughly while
in transit. Under some conditions, the combustion
chamber can shift out of position. Check for proper
alignment of the burner air tube with the circular
opening in the combustion chamber and trial fit
the burner to check the insertion depth of the oil
burner into the combustion chamber.
The end of the burner air tube should be inserted
no farther than 1/4 inch back from the inside sur
-
face of the combustion chamber, refer to Figure 13 .
Do not allow the burner tube/ end cone to physi
-
cally touch or protrude into the chamber.
High temperatures in the combustion chamber can
result in damage to the tube, the end cone, or both.
A distance greater than 1/4 inch back from the in
-
side chamber wall may cause flame impingement
on the combustion chamber wall and subsequent
sooting or carbon char buildup.
The side casings have each been pre-punched with
four (4), square, knockout openings for use in locat
-
ing the proper position for the return air filter rack.
On the side of the furnace, where the return air duct
will attach, scribe a line connecting the outside edges
of the knockout openings to form a rectangle.
Using a punch, or a large screwdriver, and a hammer,
remove the knockouts and cut the return air opening
in the casing.
Sheet metal shears, or a power metal cutting tool, will
be required to cut the casing.
Position the open end of the filter rack to the front of
the furnace to permit access for filter replacement.
Align the filter rack with the rectangular hole and
mark the locations on the casing of the pre-punched
mounting holes in the filter rack flange. Drill pilot
holes in the casing and permanently attach the filter
rack to the furnace with screws, or pop-rivets (these
fasteners are not included). Connect the return air
plenum to the filter rack and slide the air filter into
position.
OIL BURNER AND NOZZLE INSTALLATION
FUEL REQUIREMENT!
This oil furnace is designed to use No. 2 distillate fuel
(home heating) oil only.
This furnace is designed to utilize the following spe-
cially modified, oil burner:
- R.W. Beckett Corp. model AF burner, specification
#EFL-101.
NOTICE: NO other burners may be used in this applica-
tion.
The heat output from the furnace is fixed, based on the
size of nozzle installed in the oil burner. Four (4) heat
input rates are permissible: 84,000, 105,000, 119,000,
and 140,000 BTUH.
Nozzle selection (i.e. heating capacity of the furnace)
shall be based on a rate of heat loss (heating load) cal
-
culation for the building. These calculations should be
made according to the manuals provided by the Air
Conditioning Contractors of America (ACCA) or the
American Society of Heating, Refrigeration and Air
Conditioning Engineers, Inc. (ASHRAE).
Refer to the Residential Load Calculation, Manual J,
from the ACCA, and the ASHRAE Handbook Funda
-
mentals volume, from ASHRAE, for the recommended
procedure to compute the design heating load of a resi
-
dence.
e
Side view of correct burner insertion
into combustion chamber.
The oil burner provided with this furnace requires ini-
tial inspection, set-up, and proper adjustment. Refer to
this manual and the oil burner manufacturer’s operat
-
ing instructions for detailed information on the follow-
ing items:
- Initial firing of burner
- Adjusting the burner combustion air
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