| REDUCER |
C | |
|
SPACERS
(1)FINGER TAB DUCT CONNECTOR ONLY
(2)SCREW DOWN DUCT CONNECTOR ONLY
( )OPENING TO DUCT
(1)WITH PLATE (C) REMOVED OPENING BECOMES
(2)WITH PLATE (C) REMOVED OPENING BECOMES
13" X 13". WITH REDUCER IT IS 13" X
XSEE TABLE 5
Figure 5.
WALL
SIDE
ALT. FUEL
LINE HOLES
C
L
FUEL LINE
HOLE
REAR | WALL |
|
10"
C
L
FLOOR
OPENING
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Figure 6. Closet or Alcove
i.Gas piping is not run in or through the return duct system.
j.Test the negative pressure in the closet with the
k.For floor return systems, the manufactured home manufacturer shall affix a prominent marking on or near the appliance where it can be easily read when the closet door is open. The marking shall read:
!CAUTION:
HAZARD OF ASPHYXIATION: Do not cover or restrict return air opening.
l.Air conditioning systems may require more duct register and open louver area to ob-
tain necessary airflow. Use NORDYNE’s certiduct program to determine proper duct size for A/C.
DUCTED RETURN AIR
M3 furnaces with model numbers ending in AW or BW are factory configured for the return air to flow through the front louvered door. The return air may also be attached to either side or the top of the furnace cabinet using a field installed kit. Refer to Table 12 for the NORDYNE ducted return kit P/N number. The location and size of the side and top return air connections are shown in Figure 1. The filter size for the side return air is 20” x 20” x 1”. For top return the filter size is 24” x 16” x 1”.
M3 furnaces with model numbers ending in BWT are factory configured for the return air to enter the top of the furnace.
9