Upfiow Furnace Installation; Downflowfurnace Installation - Nordyne M2RC-080 Installation Instructions Manual

If "X"
(Floor cavity) is:
7/8" (22ram)
2" (51ram)
4 1/4" (108ram)
6 1/4" (159rnm)
8 1/4" (210mm)
10 1/4" (260ram)
12 1/4" (311mm)
Use Duct
Connector Model
901987
901988
901989
901990
901991
901992
901993
Table 5. Duct Connectors
1-10 li,,
, 1
Figure 4. Top View of Duct Connector
OPENING TO DUCT
WITH pLATE {C) REMOVED
13-1/4" x 13-1/4"
OPENING BECOMES
Figure 5. Duct Connector
UPFLOWFURNACE
INSTALLATION
a. Position the furnace on top of the return
air ductwork or return air stand. NOTE:
The ductwork or stand must have an
opening equal to that of the return air
opening of the furnace. Refer to Figure 1
for the proper return air opening size.
Secure the furnace to the floor or base
once it has been properly positioned.
b. Position and secure the A/C coil box to
the top of the furnace. The A/C coil box
C.
d.
can be secured to the furnace using the
provided attachment brackets. These
brackets are designed to attach the
furnace cabinet to the A/C coil box on the
sides. To install these brackets, position
one bracket on the side of the furnace,
so that the locating dimples are in the
groove created by the top of the furnace
cabinet and the bottom of the A/C coil
box. Using the provided self-drilling
screws, secure the bracket to the A/C
coil box and the furnace. Repeat on the
other side of the furnace for the other
bracket.
Attach the plenum from the supply duct
to the flanges of the A/C coil box.
Secure the plenum to the supply
ductwork.
NOTE: Additional fasteners may be used
at rear, sides or through door frame, as
desired, to secure furnace to closet or
alcove framing.
DOWNFLOWFURNACE
INSTALLATION
DUCT CONNECTOR SELECTION FOR
DOWNFLOW MODELS
a. Determine depth of floor cavity from
surface of floor to top of supply air duct
(See Figure 3).
b. Select appropriate model from Table 5
which matches X-dimension of the floor
cavity. To maximize air delivery, remove
reducer "C" (see Figure 5) to obtain the
largest open area that will fit the duct/
floor construction.
INSTALLATION OF THE DUCT CONNEC-
TOR FOR DOWNFLOW INSTALLATIONS
Required cut-out openings in the floor, ceiling,
roof, and/or walls must be carefully located to
avoid misalignment of the furnace, combustion
air piping, and vent piping (see Figures 14-16).
Installation procedures are suggested for
typical furnace installations and need not be
followed in the exact listed sequence.
CUT OUT FLOOR OPENING FOR
DOWNFLOW MODELS
a. Determine center of closet or alcove
(Figure 7).
b. Locate center of the floor opening, mea-
sured 10" from the rear wall, and mark
cut-out measuring approximately 14-1/
2" by 14-1/2" (+ 1") for model duct
connector used (refer to Figures 6 & 7).