Bryant 66120 Installation, Start-Up, Operating And Service And Maintenance Instructions page 51

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
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 40K, 60K or 100K 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 40K
Table 14 – Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials (USA Installations)
1. 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.
2. See Table below for approved materials for use in the U.S.A.
USA
3. ULC S636 vent systems must be composed of pipe, fittings, cements, and primers from the same supplier.
4. Factory accessory concentric vent kits are ULC S636 listed.
1. Installation in Canada must conform to the requirements of CAN/CSA B149 code.
2. Vent systems must be composed of pipe, fittings, cements, and primers from the same supplier and listed to ULC S636.
CANADA 3. Not all materials below may be approved or listed to ULC S636.
4. Royal Pipe and IPEX are approved suppliers of ULC S636 pipe, fittings, cements and primers*.
5. Factory accessory concentric vent kits are ULC S636 listed for use with Royal Pipe and IPEX venting systems
Material
Pressure Pipe
Cellular Core
PVC
DWV- -IPS Sizes
ABS
Cellular Core DWV- -IPS Sizes
Pressure Pipe
CPVC
*PVC and ABS pipe may use either DWV or pressure rated fittings.
**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.
Type
Description
Schedule 40
DWV Schedule 40
Schedule 40
SDR 26 N/A
SDR 21 N/A
IPEX Schedule 40
Royal Pipe Schedule 40
ABS Schedule 40
Schedule 40
Schedule 40
Schedule 40
SDR N/A
IPEX Schedule 40
Royal Pipe Schedule 40
Approved Manufacturer
M & G Dura Vent
models is shipped in the loose parts bag. See Table 16 for usage,
part numbers and sourcing of 60K and 100K inducer outlet
restrictors.
To determine if the outlet restrictor is required, see Table 16.
Failure to use an outlet restrictor on the 40K 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
D1785
D1785/D2665
D2466
F891 or
D2665
D2241
D2241
ULC S636 ULC S636
ULC S636 ULC S636
D1527 D2468
D2661 D2661
F628
F441 F438
F442 N/A
ULC S636 ULC S636
ULC S636 ULC S636
51
Solvents/Primers** Cements
F656 D2564
ULC S636 ULC S636
ULC S636 ULC S636
Clear Cleaner For ABS†
D2235
F656 F493
ULC S636 ULC S636
ULC S636 ULC S636
Solvents Primers Cements
Not Permitted