Inducer Assembly Rotation; Direct Vent (2-Pipe) Applications; Vent And Inducer Assembly Options; Accessories - Nordyne M4RC Upflow Installation Instructions Manual

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
to disconnection. Wiring errors can cause
improper and dangerous operation.
1. Disconnect the electrical harness (1) from the inducer
assembly (2). See Figure 25.
2. Remove the inducer assembly ground wire (3) from
the blower deck (4).
3. Remove three screws (5) securing the inducer
assembly (2) to the header box (6).
4. Rotate the inducer assembly (2) to its new position.
5. Reinstall the three screws (5) removed in step 3. If the
inducer assembly is rotated to the left or right side of
the furnace, use the extra 4th 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. Reconnect the electrical harness (1) to the inducer
assembly (2).
8. Reconnect the inducer assembly ground wire (3) to
the blower deck (4) or door.
5
2
Figure 25. Inducer Assembly Rotation
20
WARNING:
CAUTION:
STATUS
FLAME
9
BLOWER 180
8 2 120
OFF
90
7 DELAY
60
2
1 3

Direct Vent (2-Pipe) Applications

It is important that Direct Vent (2-pipe) systems maintain
an airtight fl ow path from the air inlet to the fl ue gas outlet.
The furnace ships from the factory with two holes in the
cabinet for the air inlet and fl ue gas outlet. In certain
confi gurations, it is necessary to remove and relocate
a plastic cap in the furnace cabinet. If changing the
position of the air inlet and fl ue 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 39 (page 37).

Vent and Inducer Assembly Options

To increase installation fl exibility, 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
airfl ow of the furnace (upfl ow or downfl ow), and then
the side that the pipes will exit from the furnace.
2. Select the option from Table 5 that properly matches
your installation type and then fi nd your setup (by
Option number) in Figures 42 - 43 (pages 45 - 46).
Vent
Up
Right
Left
Vent
Up
Right
Left
6
Table 5. Vent and Inducer Blower Options
4

Accessories

The components in Figures 26 - 29 (pages 21 - 22)
are included in the extra parts bag that is supplied with
the purchase of M4RC/M4RL furnaces. Depending on
your particular installation, some of these components
are optional and may not be used. Please refer to the
descriptions and accompanying fi gures when installing
these items.
1 Pipe Installations
Upfl ow Downfl ow
Option 1
Option 2*
Option 3*
2-Pipe Installations
Upfl ow Downfl ow
Option 4 Option 10
Option 5* Option 11*
Option 6* Option 12*
Option 7
Option 8*
Option 9*