16
CONNECTING ROOF JACK TO FURNACE
CAUTION
The inner flue pipe must be present.
It is mandatory that the combustion air pipe and flue
pipe assembly be fully engaged. The combustion air
pipe MUST be securely fastened to the furnace with
sheet metal screws in the holes provided.
Use
1
/
2
” blunt or sharp end sheet metal screws to fasten
roof jack combustion air pipe to furnace combustion air
collar. Screw holes are provided in the pipe and collar.
Excessively long screws may extend to flue pipe and
puncture it. Screws are not to exceed 1
1
/
2
” in length.
NOTE
Combustion air tube and flue pipe are part of the same as-
sembly. Only the combustion air tube need be fastened to
the furnace.
1. Check to be certain that the flue pipe and combustion
air tube are present.
2. Pull the telescoping flue tube and combustion air tube
assembly down from the roof jack. Slide the flue tube/
combustion air tube assembly down firmly over the fur-
nace flue outlet and combustion air collar. Insure that
the back, side and front of combustion air tube collar
is fully engaged. Fasten the combustion air tube to the
furnace combustion air collar using two (2)
1
/
2
inch
sheet metal screws. (Screw holes are provided in com-
bustion air tube and furnace combustion air collar.
(See Figure 15.)
It is mandatory that the combustion air and flue tube
assembly be fully engaged at back sides and front, and
combustion air tube securely fastened to the furnace
with sheet metal screws (2) in the screw holes pro-
vided.
COMBUSTION
AIR TUBE
FLUE PIPE
K
SCREW
HOLES (2)
COMBUSTION
AIR TUBE COLLAR
K
#8 OR #10
SCREWS RECOMMENDED
FURNACE
FLUE OUTLET
SECURE
STRAP
TO WALL
FRONT OF FURNACE
Figure 15 — Connecting Roof Jack to Furnace
