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Figure 23
1
2
Figure 23. Alternate Removal Method
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.
1. Prior to vent installation, determine the number of pipes
to be connected to the furnace (1-pipe or 2-pipe), the
airflow of the furnace (upflow or downflow), and then
the side that the pipes will exit from the furnace.
2. Select the option from
your installation type and then find your setup (by Option
number) in
Figure 44 (page 44)
45).
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 cap 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 cap
to maintain air tightness in the furnace. Measurements
for hole locations on *RC and *RL series furnaces are
shown in
Figure 41 (page
Inducer Assembly Rotation
WARNING:
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.
20
4
5
7
6
3
Table 4
that properly matches
&
Figure 45 (page
37).
Table 4
1 Pipe Installations
Vent
Upflow
Up
Option 1
Right
Option 2*
Left
Option 3*
2-Pipe Installations
Vent
Upflow
Up
Option 4
Right
Option 5*
Left
Option 6*
Table 4. Vent & Inducer Blower Options
CAUTION:
It is good practice to label all wires prior
to disconnection. Wiring errors can cause
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 three 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
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. NOTE: The
cabinet plug must always be used to close the hole in
the side of the furnace when rotating the inducer.
7. Install in-line drain assembly and tubing.
8. If applicable, install the condensate drain lines For M4RC
series see
Figure
44. For M4RL series see
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
Figure 24 (page 21)
&
the proper routing of pressure switch tubing for *M4
Series furnaces. All upflow (M4RC) furnaces have two
switches, one connected to the static tap on the inducer
assembly and the other to the collector box. Downflow
(M4RL Series) furnaces require only one switch connected
to the inducer's static tap as shown in
Downflow
Option 7
Option 8*
Option 9*
Downflow
Option 10
Option 11*
Option 12*
Figure
Figure 25 (page 21)
display
Figure
25.
45.
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