Service Manual

INSTALLATION CONSIDERATIONS
21
Model
Pipe
Size
12345678
2" 145 140 135 130 125 120 115 110
3" 238 231 224 217 210 203 196 189
2" 220 215 210 205 200 195 190 185
3" 224 217 210 203 196 189 182 175
2" 95 90 85 80 75 70 65 60
3" 238 231 224 217 210 203 196 189
2" 95 90 85 80 75 70 65 60
3" 238 231 224 217 210 203 196 189
2" 45 40 35 30 25 20 15 10
3" 217 210 203 196 189 182 175 168
2" 45 40 35 30 25 20 15 10
3" 217 210 203 196 189 182 175 168
*MSS9*1205DNA* 3" 238 231 224 217 210 203 196 189
Model
Pipe
Size
12345678
2" 145 140 135 130 125 120 115 110
3" 238 231 224 217 210 203 196 189
2" 120 115 110 105 100 95 90 85
3" 224 217 210 203 196 189 182 175
2" 95 90 85 80 75 70 65 60
3" 238 231 224 217 210 203 196 189
2" 25 20 15 10 5 n/a n/a n/a
3" 238 231 224 217 210 203 196 189
*CSS9*1205DNA* 3" 238 231 224 217 210 203 196 189
*MSS9*0805CNA*
*MSS921004CNA*
*MSS921005CNA*
*MSS961005CNA*
*CSS9*0402BNA*
*CSS9*0603BNA*
*CSS9*0804CNA*
*CSS9*1005CNA*
*MSS9*/*CSS9 Direct Vent (2-Pipe)
& Non-Direct Vent (1-Pipe)
(6)
Maximum allowable Length of Vent/Flue Pipe
& Combustion Air Pipe (Ft)
(1) (2)
Number of Elbows
(3) (5)
*MSS9*0402BNA*
*MSS9*0603BNA*
*MSS9*0803BNA*
*MSS9*0804CNA*
1) Maximum allowable limits listed on individual lengths for inlet and flue and
NOT a combination.
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 determining
the number of elbows in the piping system.
4) 2 1/2” or 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.
6) One 90° elbow should be secured to the combustion air intake connection.
Vent/Flue and Combustion Air Pipe Lengths and Diam-
eters
Refer to the preceding table for applicable length, elbows,
and pipe diameter for construction of the vent/flue and com-
bustion air intake pipe systems of a non-direct vent (single
pipe) installation. The number of elbows tabulated repre-
sents 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 num-
ber of elbows in the piping systems.
If the combustion air intake pipe is to be installed above a
finished ceiling or other area where dripping of condensate
will be objectionable, insulation of the combustion air pipe
may be required. Use 1/2” thick closed cell foam insulation
such as Armaflex or Insultube where required.
Vent/Flue Pipe Terminations
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 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 must
be sealed tight with proper flashing such as is used with a
plastic plumbing vent.
NOTE: Terminate both pipes in the same pressure zone
(same side of roof, no major obstacles between pipes,
etc.).
COMBUSTION AIR INTAKE
(OPTIONAL)
*Not required for
single pipe installation
TEE (OPTIONAL)
9
6
”
M
A
X
.
-
3
”
M
I
N
.
R
O
O
F
L
I
N
E
INTAKE
SCREEN
OPTIONAL
12” MIN
HEIGHT DIFFERENCE
BETWEEN
INTAKE AND VENT
12” MIN TO ROOF OR HIGHEST
ANTICIPATED SNOW LEVEL
STRAIGHT
ELBOWS
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.