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Venting Options
The SLP99DF is shipped with vent exhaust / air intake
connection at the top cap. See FIGURE 15. Using parts
provided, the furnace may be field modified to have these
connections on the right side of the furnace cabinet. See
FIGURE 17 and follow the steps below. For left side vent-
ing order kit 87W73.
1 - Remove inner blower door.
2 - Loosen hose clamps which attach rubber fittings to
the white PVC pipes inside the vestibule area. See
FIGURE 15.
3 - Loosen the clamp which secures the pipes at the
blower deck. See FIGURE 15.
4 - Remove white PVC pipes, slide up and out thru the
top cap.
5 - Remove the remaining parts of the pipe clamp at
the blower deck.
6 - Remove the black plastic fitting in top cap which
previously aligned the PVC pipes.
7 - Remove the sheet metal patch plate on the side
of the cabinet which covers the openings for side
venting option. Save screws for reuse.
8 - Re-use the patch plate to cover the hole in the top
cap. See FIGURE 16. Remove the 2 screws which
secure the top cap to the furnace on the right side
and re-install securing the right edge of the patch
plate and the right side of the top cap to the furnace.
Use 2 self-drilling sheet metal screws (provided) to
finish securing the left edge of the patch plate on
the left side.
9 - Use a utility knife to cut out the cabinet insulation for
the right side vent / air intake.
10 - Install the two 90° street elbows (provided) through
the side of the cabinet. The male side of each
elbow should extend down through the blower deck
and connect to the rubber fittings below. Once the
elbows are properly positioned, tighten each clamp.
11 - Peel protective backing from side vent sealing
gaskets (2) and apply to side vent sealing plates (2)
as shown in FIGURE 17.
12 - Install the side vent sealing plates and gaskets
on the exterior of the cabinet as shown in figure
15. Secure with six mounting screws (four reused
and two provided from bag assembly). Holes are
pre-punched in the parts and cabinet, no drilling is
required.
13 - Install sheet metal screws (provided) to seal extra
two holes in cabinet not used with side vent clamps.
Side vent sealing plates and side vent sealing gaskets
must be used when converting to right side venting.
Failure to use gaskets and plates may lead to improper
operation of unit.
Top Vent Configuration
Page 13
IMPORTANT
Exhaust/Air
Intake Connections
Pipe Clamp
Hose Clamp
FIGURE 15
Patch Plate Top Cap
Sheet Metal
Patch Plate
FIGURE 16
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