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Inducer & Venting Options
To increase installation flexibility, the inducer assembly can
be rotated up to 3 different positions. Each variation has
slightly different requirements with regard to condensate
disposal and, in some cases, the need to seal the furnace
cabinet.
IMPORTANT NOTE: The Inducer Assembly must
never be positioned to vent downwards on horizontal
installs.
Before using Table 4, the number of pipes (1-pipe or 2-pipe)
connected to the furnace must be known. Find the proper
furnace style (upflow, horizontal, or downflow) and then
the side that the pipes will exit from the furnace. Finally
select the option that properly matches your installation
type. For 92.1% series,
Figure
37, or
Figure 38.
For 95.0% series, see
Figure
40,
Figure
41, or
NOTE: It is important that Direct Vent (2-pipe) systems
maintain an airtight flow path from the air inlet to the flue
gas outlet. The furnace ships from the factory with two
holes in the cabinet for the air inlet and flue gas outlet.
In certain configurations, it is necessary to remove and
relocate a plastic plug in the furnace cabinet. If changing
the position of the air inlet and flue gas outlet, it is required
that the previous hole be closed off with the plastic plug to
maintain air tightness in the furnace. The hole locations for
all furnace series are shown in
92.1% Conventional (1 Pipe)
Vent
Upflow
Direction
Up
Option 1
Right
Option 2
Left
Option 3
92.1% Direct Vent (2-pipe)
Vent
Upflow
Direction
Up
Option 4
Right
Option 5
Left
Option 6
95.0% Conventional (1 Pipe)
Vent
Upflow
Direction
Right
Option 21
Up
N/A
Left
Option 22
95.0% Direct Vent (2-pipe)
Vent
Upflow
Direction
Right
Option 23
Up
N/A
Left
Option 24
Table 4. Vent & Inducer Blower Options
18
Figure
34,
Figure
35,
Figure
Figure
Figure
42.
Figure 31
and
Figure
Horizontal
Horizontal
Downflow
Right
Left
Option 7
Option 10
Option 15
Option 8
N/A
Option 16
N/A
Option 9
Option 17
Horizontal
Horizontal
Downflow
Right
Left
Option 12
Option 14
Option 18
Option 11
N/A
Option 19
N/A
Option 13
Option 20
Horizontal
Horizontal
Downflow
Right
Left
N/A
N/A
Option 29
Option 25
Option 26
Option 30
N/A
N/A
Option 31
Horizontal
Horizontal
Downflow
Right
Left
N/A
N/A
Option 32
Option 27
Option 28
Option 33
N/A
N/A
Option 34
Inducer Assembly Rotation
Inducer rotation must be completed before
the furnace is connected to gas and electric. If
both utilities have been connected, follow the
shutdown procedures printed on the furnace
label and disconnect the electrical supply.
It is good practice to label all wires prior
36,
to disconnection. Wiring errors can cause
39,
improper and dangerous operation.
1. Disconnect the electrical harness from the inducer
assembly.
2. Remove the inducer assembly ground wire from the
blower deck.
3. Remove 3 screws securing the inducer assembly to the
header box.
4. Rotate the inducer assembly to its new position.
5. Secure the inducer assembly to the header box by
reinstalling the three screws. If the inducer assembly
32.
is rotated to the left or right side of the furnace, use the
extra screw provided in the parts package.
6. Remove the cabinet plug from side of furnace and
reinstall in hole on opposite side of cabinet.
7. Install in-line drain assembly and tubing.
8. Install all condensate drain lines. For 92.1% series,
refer to
Figure
34,
Figure 38.
For 95.0% series, refer to
40,
Figure
41, or
9. Reconnect the electrical harness to the inducer
assembly.
10. Reconnect the inducer assembly ground wire to the
blower deck or door.
11. Verify operation as detailed on the furnace label.
Pressure Switch Tubing
All upflow / horizontal furnaces have two switches, one
connected to the static tap on the inducer assembly and
the other to the collector box.
Figure 16 (page 19)
switch tubing for *SC & *SD furnaces. Downflow (*SL &
*SM) furnaces require only one switch connected to the
inducer's static tap as shown in
Alternate Pressure Switch Location
In some inducer orientations, the inducer pressure switch
may interfere with gas pipe installation. Determine the
side of the cabinet the gas pipe will enter and see if the
inducer pressure switch needs to be moved. If the pressure
switch interferes with the gas pipe, use these instructions
for relocating it to an alternate location:
WARNING:
CAUTION:
Figure
35,
Figure
36,
Figure
Figure
Figure
42.
Figure 15 (page 19)
display the proper routing of pressure
Figure 17 (page
37, or
39,
Figure
&
19).
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