47
NOTE
: Do not allow insulation or other materials to accumulate
inside of pipe assembly when installing it through hole.
4. Locate assembly through sidewall with rain shield posi-
tioned no more than 1--in. (25 mm) from wall as shown in
Fig
.
46.
5. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping. DO NOT CE-
MENT POLYPROPYLENE FITTINGS.
2--Pipe (Direct Vent) and 1--Pipe (Ventilated Combus-
tion Air) Vent Termination
NOTE
: Follow the instructions of the vent terminal manufacturer.
These instructions are provided as a reference, only.
RECOMMENDED SUPPORT FOR VENT
TERMINATIONS
It is recommended that sidewall vent terminations in excess of
24 inches (0.6 M) in vertical length be supported by
EITHER
the Direct Vent Termination Kit shown in Table 12 or by
field--supplied brackets or supports fastened to the structure.
NOTICE
Determine an appropriate location for termination kit using the
guidelines provided in section “Locating The Vent Termination” in
this instruction.
1. Cut two holes, one for each pipe, of appropriate size for
pipe size being used.
2. Loosely install elbow in bracket (if used) and place as-
sembly on combustion--air pipe.
3. Install bracket as shown in Fig. 46 and 48.
NOTE
: For applications using vent pipe option indicated by
dashed lines in Fig. 46 and 47, rotate vent elbow 90
_
from
position.
4. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping. DO NOT CE-
MENT POLYPROPYLENE FITTINGS.
For ventilated Combustion Air Terminations, terminate as
shown in Fig. 47.
(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 Fig. 46, but next vent
termination, or pair of vent terminations, must be at least 36 in.
(914 mm) away from the first two terminations. It is important that
vent terminations be made as shown in Fig. 46 to avoid
recirculation of vent 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.
Table 13 – Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials (U.S.A. Installations)
ASTM SPECIFICATION
(MARKED ON MATERIAL)
MATERIAL
PIPE
FITTINGS
SOLVENT CEMENT
AND PRIMERS
DESCRIPTION
D1527
ABS
Pipe
—
—
Schedule---40
D1785
PVC
Pipe
—
—
Schedule---40
D2235
For ABS
—
—
Solvent Cement
For ABS
D2241
PVC
Pipe
—
—
SDR---21 & SDR---26
D2466
PVC
—
Fittings
—
Schedule---40
D2468
ABS
—
Fittings
—
Schedule---40
D2564
For PVC
—
—
Solvent Cement
For PVC
D2661
ABS
Pipe
Fittings
—
DWV at Schedule---40 IPS sizes
D2665
PVC
Pipe
Fittings
—
DWV
F438
CPVC
—
Fittings
—
Schedule---40
F441
CPVC
Pipe
—
—
Schedule---40
F442
CPVC
Pipe
—
—
SDR
F493
For CPVC
—
—
Solvent Cement
For CPVC
F628
ABS
Pipe
—
—
Cellular Core DWV at Schedule---40
IPS sizes
F656
For PVC
—
—
Primer
For PVC
F891
PVC
Pipe
—
—
Cellular Core Schedule---40 & DWV
59MN
7A