GM9S96 Service Manual
SYSTEM OPERATION
14
*M9S9 / *C9S9 Direct Vent (2-Pipe) & Non-Direct Vent (1-Pipe)
(6)
Maximum Allowable Length of Vent/Flue Pipe
MODEL
PIPE
SIZE
1 2 3 4 5 6 7 8
2^ 108 105 101 97 93 90 86 82
3 126 120 115 110 105 99 94 89
2 55 50 45 40 35 30 25 20
3 127 120 113 106 99 92 85 78
2 30 25 20 15 10 5 N/A N/A
3 72 65 58 51 44 37 30 23
2 30 25 20 15 10 5 N/A N/A
3 72 65 58 51 44 37 30 23
2 40 35 30 25 20 15 10 5
3 72 65 58 51 44 37 30 23
2 60 55 50 45 40 35 30 25
3 168 161 154 147 140 133 126 119
2 30 25 20 15 10 5 N/A N/A
3 113 106 99 92 85 78 71 64
2 N/A N/A N/A N/A N/A N/A N/ A N/A
3 65 58 51 44 37 30 23 16
MODEL
PIPE
1 2 3 4 5 6 7 8
2^ 7 5 71 67 63 60 56 52 48
3 126 120 115 110 105 99 94 89
2 45 40 35 30 25 20 15 10
3 168 161 154 147 140 133 126 119
2 35 30 25 20 15 10 5 N/A
3 168 161 154 147 140 133 126 119
2 60 55 50 45 40 35 30 25
3 113 106 99 92 85 78 71 64
2 45 40 35 30 25 20 15 10
3 120 113 106 99 92 85 78 71
2 40 35 30 25 20 15 10 5
3 151 144 137 130 123 116 109 102
2 N/A N/A N/A N/A N/A N/A N/ A N/A
3 158 151 144 137 130 123 116 109
2 100 95 90 85 80 75 70 65
3 137 130 123 116 109 102 95 88
2 45 40 35 30 25 20 15 10
3 168 161 154 147 140 133 126 119
2 40 35 30 25 20 15 10 5
3 120 113 106 99 92 85 78 71
2 N/A N/A N/A N/A N/A N/A N/ A N/A
3 113 106 99 92 85 78 71 64
2 N/A N/A N/A N/A N/A N/A N/ A N/A
3 110 103 96 89 82 75 68 61
*M9S920403AN
Number of Elbow s
(3) (5)
*M9S920603BN
*M9S960403AN
*M9S960803BN
*M9S960804BN
*M9S960603BN
*M9S920803BN
*M9S920804CN
*M9S920805CN
*M9S921004CN
*M9S921005CN
*M9S921205DN
*M9S960805CN
*M9S961005CN
*C9S961005CN
*C9S961205DN
*M9S961205DN
*C9S960403BN
*C9S960603BN
*C9S960804CN
1. Maximum allowable limits listed on individual lengths for inlet and
2.
and one elbow/tee.
3. -
mining the number of elbows in the piping system.
4.
5.
elbows should be considered equivalent to one 90 deg. elbow.
6. One 90° elbow should be secured to the combustion air intake
connection.
Refer to the preceding table for applicable length, elbows,
-
bustion air intake pipe systems of a non-direct vent (single
pipe) installation. The number of elbows tabulated rep-
resents the number of elbows and/or tees in each (Vent/Flue
& Combustion Air Intake) pipe. Elbows and/or tees used in
the terminations must be included when determining the
number of elbows in the piping systems.
If the combustion air intake pipe is to be installed above a
will be objectionable, insulation of the combustion air pipe
roof, or horizontally, as through an outside wall.
Vent/Flue Pipe and Combustion
Air Pipe - Termination Locations section in this manual or
the installation instructions for details concerning location
restrictions. The penetration of the vent through the roof
with a plastic plumbing vent.
Terminate both pipes in the same pressure zone
(same side of roof, no major obstacles between pipes, etc.).
R
L
I
N
E
9
6
M
AX
-
3
M
I
N
12” MIN
HEIGHT DIFFERENCE
BETWEEN
INTAKE AND VENT
12” MIN TO ROOF OR HIGHEST
ANTICIPATED SNOW LEVEL
STRAIGHT
ELBOWS
Vent/Flue Pipe and Combus-
tion Air Pipe - Termination Locations section in this manual
or the installation instructions for details concerning location
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
outside of the wall. The wall penetration should be sealed
with silicone caulking material.