Payne PG95 Installation, Start-Up, Operating And Service And Maintenance Instructions page 45

NOTICE
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.
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 assem-
bly on combustion−air pipe.
3. Install bracket as shown in Fig. 53 and 55.
NOTE: For applications using vent pipe option indicated by
dashed lines in Fig. 53 and 54, 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.
(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. 53, but next vent
Table 14 – Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials (U.S.A. Installations)
1.
USA 2.
3.
4.
1.
2.
CANADA 3.
4.
5.
Material Description
Pressure Pipe
DWV
Cellular Core
SDR 26
PVC
SDR21
IPEX
Royal Pipe
ABS
ABS
Cellular Core DWV
Pressure Pipe
SDR
CPVC
IPEX
Royal Pipe
*Colored or tinted solvents or primers must be used where required by code in the USA
†ABS plastic does not require a primer before solvent cementing. A cleaner for ABS is recommended to remove any surface residue. ABS
cleaners are not subject to ASTM standards.
Polypropylene
Poly Pro®
NOTE: Polypropylene vent systems are UL-1738 and ULC S636 listed and assembled using mechanical fastening systems supplied by the
vent manufacturer.
All pipe, fittings, primers*, and solvents* must conform to American National Standards Institute (ANSI) standards and
American Society for Testing and Materials (ASTM) standards or ULC S636 where required by code.
See Table below for approved materials for use in the U.S.A.
ULC S636 vent systems must be composed of pipe, fittings, cements, and primers from the same supplier.
Factory accessory concentric vent kits are ULC S636 listed.
Installation in Canada must conform to the requirements of CAN/CSA B149 code.
Vent systems must be composed of pipe, fittings, cements, and primers from the same supplier and listed to ULC S636.
Not all materials below may be approved or listed to ULC S636.
Royal Pipe and IPEX are approved suppliers of ULC S636 pipe, fittings, cements and primers*.
Factory accessory concentric vent kits are ULC S636 listed for use with Royal Pipe and IPEX venting systems.
Type
Schedule 40
Schedule 40
Schedule 40
N/A
N/A
Schedule 40
Schedule 40
Schedule 40
Schedule 40
Schedule 40
N/A
Schedule 40
Schedule 40
Approved Manufacturer
M & G Dura 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. 53 to avoid
recirculation of vent gases.
Inducer Outlet Restrictor
To improve efficiency and operation of 26K, 40K, or 60K BTUH
input models on very short vent systems, an inducer outlet
restrictor is required to be installed on the outlet of the inducer
assembly. The outlet restrictor is shown in the footnote of Table 16
−Maximum Equivalent Vent Length. The outlet restrictor for 26K
and 40K models is shipped in the loose parts bag. See Table 16 for
usage, part numbers and sourcing of 60K inducer outlet restrictors.
To determine if the outlet restrictor is required, see Table 16.
Failure to use an outlet restrictor on the 40K input model when
required may result in flame disturbance or flame sense
lockout.
To install the outlet restrictor:
1. Remove the vent elbow from the inducer outlet.
2. Align the lock tabs on the outlet restrictor with the slots on
inside outlet of the inducer assembly.
3. Snap the outlet restrictor in place.
4. Re-install the vent elbow.
5. Torque vent elbow clamp 15-lb−in.
MATERIALS
ASTM or ULC Specification
Pipe Fittings
D1785 D2665
D1785 D2665
F891 D2466
D2241 N/A
D2241 N/A
ULC S636 ULC S636
ULC S636 ULC S636
D1527 D2468
F628 D2661
F441 F438
F442 N/A
ULC S636 ULC S636
ULC S636 ULC S636
45
Solvents
Cements
Primers*
F656 D2564
ULC S636 ULC S636
ULC S636 ULC S636
Clear Cleaner
D2235
For ABS†
F656 F493
ULC S636 ULC S636
ULC S636 ULC S636
Solvents
Cements
Primers
Not Permitted Not Permitted