Bottom Panel Removal; Alternate Bottom Panel Removal; Pressure Switch Relocation - Nordyne M4RC Upflow Installation Instructions Manual

Duct connector tabs
Duct
Narrow
Duct
Flap
Sheet metal
screws
Figure 21. Narrow Ducts

Bottom Panel Removal

The steps listed below describe how to remove the bottom
panel from the furnace. See Figure 22.
1. Remove the door (1) from the blower compartment.
2. Disconnect the blower motor wiring harness (2) from
the control board.
3. Remove two screws (3) securing the blower assembly
(4) to the furnace.
4. Carefully pull the blower assembly (4) out thru the
front of the furnace.
5. Remove all screws (5) securing bottom panel (6) to
bottom of furnace and front brace (7).
6. Lift up and slide bottom panel (6) out through front of
furnace.
7. Reinstall the blower assembly (4) in reverse order.
1
3
4
6
Figure 22. Bottom Panel Removal

Alternate Bottom Panel Removal

If the bottom panel cannot be removed using the previous
instructions, the steps below are an alternate method for
removing the bottom panel. See Figure 23.
1. Remove the door (1) from the blower compartment .
2. Remove all screws securing the bottom panel (2) to
the front brace (3).
3. Remove two screws (4) securing the furnace cabinet
to the blower deck (5).
4. Remove all screws (6) securing the furnace cabinet
to the bottom panel (2).
Staples or sheet metal screws
Narrow
Duct
Duct Connector
Narrow
Duct
2
5
7
5. Remove the screw (7) securing the bottom corner of the
furnace cabinet to the front brace (3).
6. Carefully spread the bottom corner of the furnace
cabinet outwards while sliding the bottom panel (2)
out through the front of the furnace.
7. Reassemble the furnace in reverse order.
1
2
Figure 23. Alternate Removal Method

Pressure Switch Relocation

In some inducer orientations, the inducer pressure switch
may interfere with gas pipe installation. Check the side of
the cabinet the gas pipe will enter and determine if the
inducer pressure switch needs to be moved. If the switch
interferes with gas pipe installation, please follow these
instructions for relocating it to the alternate location:
1. Shut off any electrical power to the furnace.
2. Label and disconnect the tubing and wires from the
pressure switch.
3. Remove two screws securing the pressure switch to
the inducer housing.
4. Remove the pressure switch from the mounts on the
inducer housing and relocate it to the other set of
mounts 90° from previous location. See Figure 24.
5. Secure the pressure switch with two screws.
6. Reconnect the tubes and wires to the pressure switch.
FACTORY INSTALLED
LOCATION
Figure 24. Alternate Pressure Switch Location
4
5
7
3
ALTERNATE
LOCATION
6
19