INSTALLATION INSTRUCTIONS
Gas Furnace: (F/G)MAC
440 01 4201 01
43
Specifications subject to change without notice.
NOTE
: For applications using vent pipe option indicated by
dashed lines in
Figure 52
and
Figure 53
, rotate vent elbow 90
from position.
3. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping.
For Ventilated Combustion Air Terminations
, terminate as
shown in
Figure 53
.
(Direct Vent / 2-Pipe System ONLY)
When two or more furnaces are vented near each other, two
vent terminations may be installed as shown in
Figure 52
, but
next vent termination must be at least 36
−
in. (914 mm) away
from first two terminations. It is important that vent terminations
be made as shown in
Figure 52
to avoid recirculation of flue
gases.
Inducer Outlet Restrictor
The loose parts bag may contain an inducer outlet restrictor.
The outlet restrictor is NOT used on these furnaces. Discard
restrictor.
Figure 57
Crawl Space Vent Termination
3” (76 mm)
12” (305 mm)
Pipe hangar
Ventilated Combustion Air
intake termination in crawl
space
Ventilated Combustion
Air intake pipe
CRAWL SPACE
Figure 58
Attic Vent Termination
ATTIC
12” (305 mm) min. above
higest level of insulation
Vent through
roof flashing
Ventilated Combustion
Air intake pipe
L11F016