10.
Complete the venting as installation requires. If exiting the
top panel, use two street elbows to route the vent. One elbow se-
cured to the inducer, will angle toward the front of cabinet with
the second nested inside directed towards the top panel. Th
e
120,000 BTUH input unit will require an extension between the
inducer and the fi rst elbow. If exiting the side panels the pipe
can be routed straight outside the cabinet. Th
e pipe exiting the
cabinet in any installation should be long enough to install the
vent clamp on the outside of the cabinet.
11.
Rotate the drain coupling so the drain holes are angled down-
ward and tighten coupling bands.
12.
Tighten the vent clamp and secure in place using three screws
provided.
Always secure or support the vent and intake to the fl oor joists or
raft ers to avoid sagging and possible fatigue of venting materials.
Th
is ensures proper drainage and prevents spilling the products of
combustion into the building.
Th
e blower compartment should be completely isolated from the
burner compartment. In tight rooms with other combustion devices,
the blower compartment must be completely isolated from the room.
Th
e combustion compartment must also be completely isolated from
the room (unless indirect vent). Sometimes the knockout tool will
punch too deep and open holes. Use caulking on the inside of the
cabinet to seal any holes. Insure that the combustion door gasket is
in good condition.
NOTICE
IMPORTANT: Keep pressure switch hose above heat
exchanger drain.
Figure 16 , Table 7 - Pressure Switch Positioning
ORIENTATION
ROTATE
INDUCER
RECOMMEND
MOUNTING
FURNACE
FLUE
Down
Left
Y
B or G
Down
Right
N
G
Up
Left
N
A or E
Up
Right
Y
G
Up
Vertical
N
A or E
Horz. Left Vertical
Y
E
Horz. Right
Vertical
N
A or E
Horz. Right
Right
N
A or E
EXAMPLE:
In a Horizontal Right/Vertical application (not shown), when the furnace
is horizontal, room air is exiting from the right side of furnace, and the fl ue is vertical
(existing from the left side panel in an upfl ow position), the pressure switch should be
mounted at location A or E.
Venting Installation Instructions
1.
Remove 4 inducer screws
2.
Disconnect inducer wire connection.
3.
Remove pressure switch and front manifold cover hose.
4.
Remove pressure switches if applicable.
5.
Remove inducer.
6.
Reverse the bands on the rubber drain coupling so the screws
are accessible if necessary. (Do not reverse the drain
coupling.) Confi rm that directional arrow on drain coupling
point away from inducer.
7.
Remove the appropriate knock out.
8.
Reinstall the inducer in the correct orientation with 4 screws
removed in step 1.
9.
Reinstall the pressure switches so that they are above the heat
exchanger drain. See pressure switches recommended
mounting table.
13 - TERMINATIONS
25
