INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)MAC
440 01 4201 01 33
Specifications subject to change without notice.
crawl space) and the space is well isolated from the living
space or garage. Combustion air requirements for this option
are the same as the requirements for providing outside air for
combustion for a single pipe vent system. Refer to the “Air For
Combustion and Ventilation Section.”
Provisions for adequate combustion, ventilation, and dilution air
must be provided in accordance with:
U.S.A. Installations: Section 9.3 NFPA 54/ANSI Z223.1-2009,
Air for Combustion and Ventilation and applicable provisions of
the local building codes.
Canadian Installations: Part 8 of CAN/CSA B149.1-2010.
Venting Systems and Air Supply for Appliances and all
authorities having jurisdiction.
Table 11 Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials (U.S.A. Installation)
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
Figure 40 Upflow Vertical Vent
Attach vent pipe adapter with gasket to furnace casing.
Align notches in rubber coupling over standoffs on adapter. Slide clamps over the coupling.
Slide vent pipe through adapter and coupling into vent elbow.
Insert vent pipe into vent elbow.
Torque all clamps 15 lb.-in.
Attach combustion air pipe adapter with gasket to furnace.
Attach combustion air pipe to adapter with silicone. Pilot drill a 1/8-in.
hole in adapter and secure with a #7 x 1/2-in sheet metal screw.
1
2
3
4
5
6
7
1
2
3
4
5
6
7
5
Any other unused
knockout may be used
for combustion air
connection.
A11310
Representative drawing only, some models may vary in appearance.
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