Installation - Nordyne M1GH 056 Installation Instructions And Owner's Manuals

IF PITCH IS: FLASHING NO.
2" in 12"
(51mm/304mm)
2 1/2" in 12"
(64mm/304mm)
3" in 12"
(76mm/304mm)
3 1/2" in 12"
(89mm/304mm)
4" in 12"
(102mm/304mm)
5" in 12" Use 901941
(127mm/304mm) with flue having
slant flashing.
Table 6. Optional Slant Deck Flashings
FLOOR CAVITY
(depth equal to "X" in Figure 11 and Table 7)
x
SUPPLY AIR DUCT
Figure 9.
13 1/4"
Figure 10.
REDUCER
FELT-SEAL
C
SPACERS
Figure 11.
8
"X" FACTOR IS:
901942 2 1/8" (54MM)
901941 2 1/2" (64MM)
901940 2 7/8" (73MM)
901939 3 1/4" (83MM)
901938 3 5/8" (92MM)
2 1/2" (64MM)
See Fig. 8
19"
Top View
of Duct
T
Connector
10 1/4"
OPENING TO DUCT
WITH PLATE (C) REMOVED
OPENING BECOMES
13-1/4" x 13-1/4"
SEE
X
TABLE 7
If "X"
(Floor cavity) is:
7/8" (22mm)
2" (51mm)
4 1/4" (108mm)
6 1/4" (159mm)
8 1/4" (210mm)
10 1/4" (260mm)
12 1/4" (311mm)
Table 7. Duct Connectors

11. INSTALLATION

Required floor, ceiling, and roof cut-out openings must be
carefully located to avoid misalignment of the furnace and
Roof Jack (see Figures 12 & 13). Installation procedures are
suggested for typical furnace installations and need not be
followed in the exact listed sequence.
CUT OUT FLOOR OPENING & FUEL LINE HOLE
a. Determine center of closet or alcove (Figure 13).
b. Locate center of the floor opening, measured 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 10 & 11).
c. Locate center of fuel line hole, measured 23-1/4" from
the rear wall and 6-5/8" to the left of center of the floor
cut-out (See Figure 12) or 5-1/4" to the left of center of
the floor cut-out, or for entry through right-side of
furnace measured 9" to the right of center of the floor
cut-out.
d. Cut out floor opening and one fuel line hole.
!
IMPORTANT:
Refer to the installation instructions provided
with optional air conditioning packages when
installing furnaces with optional cooling coil
cabinet or with optional C***-series indoor coils.
CUT OUT CEILING AND ROOF OPENINGS
a. Locate center of Roof Jack opening, measured
13 1/2" from the rear wall of closet or alcove along the
center line of furnace and floor opening. (See Figure 13)
b. Cut ceiling and roof holes as follows:
Ceiling Hole = 8-3/4" (222 mm) diameter
Roof Hole = 9-3/8" (238 mm) diameter
c. DO NOT ALLOW DEBRIS TO FALL INTO THE
FURNACE. THIS COULD CAUSE UNSAFE
OPERATION AND VOIDS THE FURNACE
WARRANTY. Use the top cap that comes with the
furnace packaging (or alternate protector) to prevent
debris from falling into the furnace before the final roof
jack connection is made.
Use Duct
Connector Model
901987
901988
901989
901990
901991
901992
901993