Roof Jack Installation; Roof Jack Selection; Application Notes - Nordyne M1B, M1G, M1M Installation Instructions Manual

SCREWS
DUCT
CONNECTOR
14" SUPPLY
CONNECTION
Figure 13. Round Duct Connector Installed
MTG. PLATE TABS
SECURE FURNACE
WITH 2 FASTENERS AT FRONT
CORNER HOLES
Figure 14. "A" & "B" Cabinet Furnaces
MTG. PLATE TABS
SECURE FURNACE
WITH 2 FASTENERS
AT FRONT CORNER HOLES
Figure 15. "A" Cabinet Furnace on Coil
Cabinet
PITCHED
ROOF
CEILING
CAVITY
"A"
Roof
Opening
CEILING
"B"
Furnace
Figure 16. Ceiling Cavity Depth
MOUNTING
PLATE
FUEL
LINE
HOLES
SLIDE FURNACE
ALL THE WAY BACK
ONTO MTG. PLATE
SLIDE FURNACE
BACK AGAINST
MTG. PLATE
SUPPLY
AIR DUCT
ROOF JACK
SLANT DECK
FLASHING
"X" (SEE TABLE 5)
Flue Pipe
Combustion Air Pipe
56" or 76"

ROOF JACK INSTALLATION

Required ceiling and roof cut-out openings (see
Figure 11) must be carefully located to avoid
misalignment of the furnace and Roof Jack.
Note: Install only Roof Jack Assemblies listed
in Table 4 on this heating appliance.

Roof Jack Selection

1. Determine depth of ceiling cavity from center
of roof opening to center of ceiling opening.
(See Dimension "A" in Figure 16.)
2. Determine ceiling height and subtract height
of furnace. (See Dimension "B" in Figure 16.)
3. Add dimensions A + B (and X from Table 5
and Figure 18 if slant deck fl ashing is used).
The total length of (A + B + X) must be within
the minimum and maximum range of one of
the Roof Jacks listed in Table 4.

Application Notes:

• FAW, FAWT, SAW and SAWT Series Roof
Jacks with a 5" diameter inner vent pipe may
be used with all models of M1 Series gas and
M5 Series oil furnaces.
F = Flat Flashing: fl exes from 0/12 to 1/12 roof
slope. See Figure 17 (page 12).
S = Slant Flashing: 2.5/12 Slope fl exes from
1/12 to 4/12 roof slope, 4/12 fl exes from
3/12 to 5/12. See Figure 18.
• Stainless steel roof jacks are available.
• M1/M5 furnaces may be used with roof jacks
as tall as 170" (except M1M 056 & M1B 066
models, which are limited to 120"). An internal
roof jack extension (p/n 901935 - 10", p/n
903107 - 18") can be used to increase roof
jack height. All connections inside the home
must be made below the ceiling.
NOTE: If the roof jack crown is covered or blocked
with snow, the furnace will not operate properly.
MODEL NUMBER
(F,S)AW(T)1523-(0,2,4)(A,S)
(F,S)AW(T)2135-(0,2,4)(A,S)
(F,S)AW(T)2747-(0,2,4)(A,S)
(F,S)AW(T)3563-(0,2,4)(A,S)
(F,S)AW(T)5195-(0,2,4)(A,S)
S AW T 27 47 - 2
F = FLAT FLASHING
S = SLANT FLASHING
MIN. ADJ.
LENGTH
AW= ALL WEATHER
TYPE:
BLANK = NON-TRANSIT
T= TRANSIT MODE
Table 4. Roof Jack Assemblies
APPROX. LENGTH
BELOW FLASHING
15" - 23"
21" - 35"
27" - 47"
35" - 63"
51" - 95"
S
FLUE STEEL TYPE
A= ALUMINIZED
S=STAINLESS
FLASHING
PITCH/12" RISE
0=FLAT
2=2.5/12
4=4/12
MAX. ADJ.
LENGTH
11