Venting Options - Lennox MERIT Series Installation Instructions Manual

TABLE 4
PIPING AND FITTINGS SPECIFICATIONS
Schedule 40 PVC (Pipe)
Schedule 40 PVC (Cellular Core Pipe)
Schedule 40 PVC (Fittings)
Schedule 40 CPVC (Pipe)
Schedule 40 CPVC (Fittings)
SDR-21 PVC or SDR-26 PVC (Pipe)
SDR-21 CPVC or SDR-26 CPVC (Pipe)
Schedule 40 ABS Cellular Core DWV
(Pipe)
Schedule 40 ABS (Pipe)
Schedule 40 ABS (Fittings)
ABS-DWV (Drain Waste & Vent) (Pipe &
Fittings)
PVC-DWV (Drain Waste & Vent) Pipe &
Fittings)
PRIMER & SOLVENT CEMENT
PVC & CPVC Primer
PVC Solvent Cement
CPVC Solvent Cement
ABS Solvent Cement
PVC/CPVC/ABS All Purpose Cement
For Fittings & Pipe of the same material
ABS to PVC or CPVC Transition Solvent
Cement
CANADA PIPE & FITTING & SOLVENT
CEMENT
PVC & CPVC Pipe and Fittings
PVC & CPVC Solvent Cement
ABS to PVC or CPVC Transition
Cement
POLYPROPYLENE VENTING SYSTEM
PolyPro® by Duravent
InnoFlue® by Centrotherm
Exhaust and intake connections are made of PVC. Use
D1785
PVC primer and solvent cement when using PVC vent
F891 pipe. When using ABS vent pipe, use transitional solvent
cement to make connections to the PVC fittings in the
D2466
unit.
F441
F438
Use PVC primer and solvent cement or ABS solvent ce-
D2241 ment meeting ASTM specifications, refer to Table 4. As an
alternate, use all purpose cement, to bond ABS, PVC, or
F442
CPVC pipe when using fittings and pipe made of the same
F628
materials. Use transition solvent cement when bonding
ABS to either PVC or CPVC
D1527
Low temperature solvent cement is recommended during
D2468
cooler weather. Metal or plastic strapping may be used for
vent pipe hangers. Uniformly apply a liberal coat of PVC
D2661
primer for PVC or use a clean dry cloth for ABS to clean
inside socket surface of fitting and male end of pipe to
D2665
depth of fitting socket.
Canadian Applications Only - Pipe, fittings, primer and
ASTM
solvent cement used to vent (exhaust) this appliance must
SPECIFICATION
be certified to ULC S636 and supplied by a single manu-
F656
facturer as part of an approved vent (exhaust) system. In
D2564
addition, the first three feet of vent pipe from the furnace
F493
flue collar must be accessible for inspection.
D2235
D2564, D2235,
F493
D3188
MARKING
ULCS636
Page 13
IMPORTANT