Allied Air Enterprises WARM AIR GAS FURNACE 92G1UH - Manual (Page 29)

506724-01 Page 29 of 57 Issue 1108
5. On field supplied terminations for sidewall exit, exhaust
piping may extend a maximum of 12 inches (305 mm)
for 2” PVC and 20 inches (508 mm) for 3” (76 mm) PVC
beyond the outside wall. Intake piping should be as
short as possible. See Figures 31 and 33.
6. On field supplied terminations, a minimum distance
between the end of the exhaust pipe and the end of the
intake pipe without a termination elbow is 8” and a
minimum distance of 6” with a termination elbow. See
Figures 31 and 33.
7. If intake and exhaust piping must be run up a side wall
to position above snow accumulation or other
obstructions, piping must be supported every 24” (610
mm) as shown in Figures 31 and 33. When exhaust
and intake piping must be run up an with pipe sized per
Table 6. The intake piping may be equipped with a 90°
elbow turndown. Using turndown will add 5 feet (1.5 m)
to the equivalent length of the pipe.
8. A multiple furnace installation may use a group of up to
four terminations assembled together horizontally, as
shown in Figure 37.
2" EXTENSION
FOR 2" PVC PIPE
1" EXTENSION
FOR 3" PVC PIPE
FIGURE 34
1−1/2" ACCELERATOR
( all −45, −070 and −090 units)
FURNACE
EXHAUST
PIPE
FURNACE
INTAKE PIPE
4’’
GLUE EXHAUST
END FLUSH INTO
TERMINATION
FLAT SIDE
FLUSH−MOUNT SIDE WALL TERMINATION
51W11
FIGURE 33
FIELD SUPPLIED WALL TERMINATION
See venting table 5 for maximum venting lengths with this
arrangement.
* Use wall support every 24" (610 mm). Use two wall supports if
extension is greater than 24" (610 mm) but less than 48" (1219 mm).
NOTE − One wall support must be 6" (152 mm) from top of each pipe
(intake and exhaust)
2" (51mm)
Vent Pipe
3" (76mm)
Vent Pipe
12" (508MM) 12" (508MM)
6" (152MM) 6" (152MM)
6" (152MM)
12" (305MM) 20" (508MM)
6" (152MM) 6" (152MM)
6" (152MM)
A −Minimum clearance
above grade or average
snow accumulation
B −Maximum horizontal
separation between
intake and exhaust
C −Minimum from
end of exhaust to
inlet of intake
D−Maximum exhaust
pipe length
E −Maximum wall support
distance from top of each
pipe (intake/exhaust)
NOTE − FIELD PROVIDED
REDUCER MAY BE
REQUIRED TO ADAPT
LARGER VENT PIPE SIZE
TO TERMINATION
D
B
C
SIZE TERMINATION
PER TABLE 6
1/2" (13mm) ARMAFLEX
INSULATION IN UN-
CONDITIONED SPACE
STRAIGHT
APPPLICATION
B
C
D
* WALL
SUPPORT
1/2" (13mm) ARMAFLEX INSULATION
IN UNCONDITIONED SPACE (IF REQUIRED)
E
EXTENDED
APPLICATION
A
A
(IF REQUIRED)