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a. Cut a notch in return-air duct (for filter access panel) to
dimensions shown in detail of Fig. 1.
b. Slide duct over filter rack.
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6. Install filter.
a. Remove metal rod from filter.
b. Trim 2 in. from width of filter (20-1/8 in. to 18-1/8 in.).
c. Reinsert rod into filter at an angle so that it does not
extend past sides of filter.
d. Remove access panel.
e. Slide filter in place.
f. Replace access panel.
II. FILTER RACK INSTALLED ON RETURN-AIR END
OPENING OF FURNACE
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This filter rack position may be used on either upflow or horizontal
installations.
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1. Using corner indentions as a guide, cut out end duct return
opening in base panel. (See Fig. 9.)
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2. Clip filter rack pieces together as shown in Fig. 1. Use the
2 longer rear/access panels. Discard shorter pair.
3. Position rack centered over opening in return-air end of
furnace with access panel toward front of unit.
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4. Hold filter rack against end of unit. Align flange of filter
rack rear panel flush with back of furnace, making sure
filter rack is square. Drill mounting holes in end of unit
according to clearance holes in filter rack top, bottom, and
rear panels. DO NOT SCREW ACCESS PANEL IN
PLACE.
5. Fasten return-air duct to filter rack.
a. Cut a notch in return-air duct (for filter access panel) to
dimensions shown in detail of Fig. 1.
b. Slide duct over filter rack.
6. Install filter.
a. Remove access panel.
b. Slide filter in place.
c. Replace access panel.
→
CHANGING FROM UPFLOW TO HORIZONTAL
1. Remove burner from unit by removing 3 burner mounting
nuts. Prevent putting undue strain on burner wiring. It may
be necessary to disconnect burner wiring in some cases.
2. Note that the 3 burner mounting studs are in the 9, 12, and
3 o'clock positions on burner mounting plate. (See Fig. 2,
A.)
A
Fig. 2—Burner Mounting Studs
3. For horizontal installations only:
a. Determine which "side" will become the "top" when unit
is laid down.
b. Remove flue pipe clearance knock-out from top front of
that side panel.
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B
A95172
—7—
c. Install flue elbow so that it exits the cabinet of furnace
through that opening.
4. Place furnace in installation position (for example on its
side).
5. Reposition burner mounting stud.
a. Remove burner mounting stud that is now in 6 o'clock
position. (See Fig. 2, B.)
b. Reinstall stud in other open position on mounting plate
so that once again there are studs in the 9, 12, and 3
o'clock positions. (See Fig. 2, A.) It may be necessary to
use 2 of the burner mounting nuts as "Jam Nuts" on stud
in order to provide a means of using a wrench to remove
a tight stud.
6. Reinstall burner ensuring that all 3 burner mounting nuts are
tight.
IMPORTANT: Burner must always be installed in upright posi-
tion with the ignition control on top.
OPERATIONAL CHECKOUT
DO NOT START BURNER UNLESS BLOWER ACCESS
PANEL IS SECURED IN PLACE.
Installation of furnace is now complete and operational checkout
may be performed.
I. START-UP
1. Check wiring against wiring diagram shown in Fig. 11.
2. Open valve on oil supply line.
3. Reset primary control.
4. Set thermostat above room temperature.
5. Set main electrical switch to ON position. Burner should
start.
DO NOT TAMPER WITH UNIT OR CONTROLS—CALL
YOUR SERVICE TECHNICIAN.
II. RECOMMENDED INSTALLATION PRACTICES AND
COMBUSTION CHECK
In order to obtain optimum performance from oil burner, the
following setup procedures must be followed:
1. A test kit (Bacharach No. 5022 kit or equivalent) to measure
smoke, stack draft, over-fire draft, CO
tures MUST be used in order to obtain proper air band
setting. Although all of the above measurements are re-
quired for optimum setup and efficiency data, the most
important readings that must be taken are smoke number,
over-fire draft, and stack draft.
2. The proper smoke number has been established by engi-
neering tests to be between 0 and 1. This degree of smoke
emission is commonly referred to as a "Trace" of smoke. It
is recommended to use a Bacharach true spot smoke test set
or equivalent.
3. In order to ensure proper draft through furnace, a baromet-
ric draft regulator (supplied with furnace) must be installed
as close to outlet of furnace as possible. In order for this
device to function properly, barometric damper must be
mounted with hinge pins horizontal and face of damper
vertical. (See instructions included with damper.) The draft
regulator should be adjusted after furnace has been firing
for at least 10 minutes, and stack draft should be measured
and set between -0.025 and -0.035 in. wc. The draft should
be checked with a Bacharach MZF draft gage or equivalent.
4. The over-fire draft, which is taken through hole provided in
observation door, is a measurement necessary to determine
if there is a blockage between oil burner and flue outlet.
, and stack tempera-
2
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