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6
Bolt the automatic
draft control to the
bottom door. Be
sure to hold the
unit straight while
tightening. After
the automatic draft
control is mounted,
the two wires must
be strung through the
exible conduit and
two ttings supplied.
The knockout plug of
the junction box must
be removed to install
the conduit tting.
Check the door of
the automatic draft control to assure proper operation.
Keep pieces of wood or coal out of the
draft door opening mechanism, as this could cause
the door to stick.
Oil the hinge at the begining of the heating
season with a light oil.
The junction box is best mounted on the side of
the furnace about 1 in. back and 8 in. from the top
of the sheet metal side. (g. C or D) If this location is
inconvenient, anywhere on the right side will work.
This gure represents the models; SF1500,
SF2500, and SF3500. It’s intention is to represent
the approximate location of the various controls.
This drawing may
also be used as a
recommendation for
routing of the wiring
and approximate
dimension of control
spacing.
Please note that
this drawing is for
reference only. Each
specic installation
will vary.
SF2600 only.
First, install the sheet metal sides as described in
the previous section. Install the snap disc switch into
the hole on the right side sheet metal. Then mount
the open backed junction box around the snap switch.
Proceed with wiring as shown on page 10. Also refer
to Figure D. in this section.
SF2600 only.
Remove oil burner unit from it’s box. Loosen the four
bolts in the pipe on the front of the furnace. Insert the
nose of the oil gun into the pipe. Before sliding the
oil burner all the way in, apply the gasket around the
nose of the oil gun by wrapping it around the nose.
Next, slide the oil burner into the pipe and secure it by
tightening the four bolts around the collar. Be sure to
tighten the bolts evenly to locate the oil burner in the
center of the pipe. The nal set-up of the oil burner
should be done by an experienced oil burner technician
with the proper equipment. Refer to the SF2600 wiring
diagram on page 10 and the oil burner manual for
proper burner set-up. There is also a section at the
end of this manual with specic oil burner instructions.
Your Harman hot-air furnace must be vented to it’s
own separate ue-lined “Class A” chimney, not less
than 8” X 8” in size. The chimney must be capable
of providing a draft reading of at least .06” water
column on a draft meter, in order to function properly.
The Chimney must be a minimum of 16 ft. high, and
must be two feet higher than anything within 10 ft.
The chimney must also be at least 3 ft. higher than
the point at which it exits or passes by the roof. A
barometric damper must be installed in the ue to
eliminate excessive draft. Any horizontal sections of
connector pipe must have at least 1/4 in. per foot rise.
Limit the number of elbows to two or less. All joints in
the connector pipe must be secured with sheet metal
screws.
Bolt the shaker handle to the block on the lower left
side of the furnace, using the bolts and lock-washers
provided.
Bolt the two manual draft controls to the front load
door. Proper installation allows the draft controls to
open approximately 1/2” from the door surface. See
Figure 1.