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PRODUCT DESIGN
ACV9, AMV9, GCV9, GMV9, GMV95
UPFLOW
Non-Direct Vent (Single Pipe)
Maximum Allowable Length of Vent/Flue Pipe (ft)
(4)
Pipe
Unit Input
(inch)
1
45,000
2
71
2
49
70,000
3
71
90,000
3
71
115,000
3
49
COUNTERFLOW
Non-Direct Vent (Single Pipe)
Maximum Allowable Length of Vent/Flue Pipe (ft)
(4)
Pipe
Unit Input
(inch)
1
2
61
70,000
3
71
2
61
90,000
3
71
1) One 90° elbow should be secured to the combustion air intake
connection.
2) Minimum requirement for each vent pipe is five (5) feet in length and
one elbow/tee.
3) Tee used in the vent/flue termination must be included when deter-
mining the number of elbows in the piping system.
4) 3" diameter pipe can be used in place of 2" diameter pipe.
5) Increased Clearance Configurations using (2) 45 deg. Long Sweep
elbows should be considered equivalent to one 90 deg. elbow.
Vent/Flue Pipe Terminations (90% Furnaces Only)
The vent/flue pipe may terminate vertically, as through a
roof, or horizontally, as through an outside wall.
Vertical vent/flue pipe termination should be as shown in
the following figures. Refer to Vent/Flue Pipe and Combus-
tion Air Pipe - Termination Locations section in this manual
or the installation instructions for details concerning loca-
tion restrictions. The penetration of the vent through the roof
must be sealed tight with proper flashing such as is used
with a plastic plumbing vent.
46
(1)(2)
(3)(5)
Number of Elbows
2
3
4
5
6
68
65
62
59
56
53
46
43
40
37
34
31
68
65
62
59
56
53
68
65
62
59
56
53
46
43
40
37
34
31
(1)(2)
(3)(5)
Number of Elbows
2
3
4
5
6
58
55
52
49
46
43
68
65
62
59
56
53
58
55
52
49
46
43
68
65
62
59
56
53
7
8
50
28
50
50
28
90% Furnace Standard Vertical Termination
7
8
40
50
40
50
12" MINIMUM
90% Furnace Alternate Vertical Termination
Horizontal vent/flue pipe terminations should be as shown
in the following figure. Refer to Vent/Flue Pipe and Combus-
tion Air Pipe - Termination Locations section in this manual
or the installation instructions for details concerning loca-
tion restrictions. A 2 3/8" diameter wall penetration is re-
quired for 2" diameter pipe while a 3 1/2" diameter hole is
required for 3" diameter pipe. To secure the pipe passing
through the wall and prohibit damage to piping connections,
a coupling should be installed on either side of the wall and
solvent cemented to a length of pipe connecting the two
couplings. The length of pipe should be the wall thickness
plus the depth of the socket fittings to be installed on the
inside and outside of the wall. The wall penetration should
be sealed with silicone caulking material.
TEE
12 " MINIMUM TO
ROOF OR
HIGHEST ANTICIPATED
SNOW LEVEL
(Single Pipe)
90º
MEDIUM RADIUS
ELBOW
(Single Pipe)
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