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.