Locating & Cutting Roof Openings - Nordyne M1B, M1G, M1M Installation Instructions Manual

Figure 17. Example of Flat Jack
with Flashing
Figure 18. Example of 2½/12 Slant Jack
with Flashing
If the home is located in regions where snow
accumulation exceeds 7" (HUD snowload zones)
use an external roof jack extension (p/n 901937).
Extensions are optional accessories and may be
purchased through your NORDYNE distributor.
Locating and Cutting Roof & Ceiling Openings
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 fi nal roof jack connection is made
ROOF JACK SERIES
"F Series
"S" Series (2.5 / 12
Pitch only)
Optional Deck Flashings for Flat and 2.5/12 Pitch Roof Jacks. 4/12 Pitch Roof Jacks not applicable.
12
1. Locate center of Roof Jack opening, measure
2. Cut ceiling and roof holes as follows:
IF ROOF PITCH IS:
2" in 12"
2-1/2" in 12"
3" in 12"
3-1/2" in 12"
4" in 12"
4-1/2" in 12"
5" in 12"
5-1/2" in 12"
6" in 12"
6-1/2" in 12"
Table 5. Slant Deck Flashings
13 1/2" from the rear wall of closet or alcove
along the center line of furnace and fl oor
opening. See Figure 19.
• Ceiling = 8 3/4" (222 mm) diameter
• Roof = 9 3/8" (238 mm) diameter
IMPORTANT:
R e f e r t o t h e i n s t a l l a t i o n
i n s t r u c t i o n s p r o v i d e d w i t h
o p t i o n a l a i r c o n d i t i o n i n g
p a c k a g e s w h e n i n s t a l l i n g
f u r n a c e s w i t h o p t i o n a l c o o l i n g
c o i l c a b i n e t o r w i t h o p t i o n a l
C * s e r i e s i n d o o r c o i l s .
20"
C L
REAR WALL OF CLOSET OR ALCOVE
24"
Figure 19. Cut-Out Dimensions for
Flue & Roof Jack
SLANT DECK
FLASHING NUMBER
903893 (2.5/12)
903893 (2.5/12)
903894 (3/12)
903894 (3/12)
903895 (4/12)
903895 (2.5/12)
903895 (2.5/12)
903894 (3/12)
903894 (3/12)
903895 (4/12)
10"
C L
FURNACE
OUTER
DOOR
"X" FACTOR
IS:
2-1/8"
2-1/2"
2-7/8"
3-1/4"
3-5/8"
2-1/8"
2-1/2"
2-7/8"
3-1/4"
3-5/8"