Non -Direct Vent (Single Pipe ) Piping - Goodman GMS9 Installation Instructions Manual

Counterflow units.
Remove plastic plug from alternate combustion air intake
location. Relocate and install plug in standard air intake
location (basepan). Plug the remaining hole in the blower
deck with the plastic plug included in the drain kit bag.
4. Upflow and Counterflow units.
With the gasket facing the cabinet side panel, and the
flange's flat spot facing forward, secure the combustion air
intake coupling to the cabinet using the screws removed in
step 1 or with field-supplied 3/8" #8 self -drilling screws.
B
E SURE NOT TO DAMAGE INTERNAL WIRING OR OTHER COMPONENTS WHEN
REINSTALLING COUPLING AND SCREWS.
5. Upflow and Counterflow units.
For non-direct vent installations installed horizontally, a
minimum of one 90° elbow should be installed on the
combustion air intake coupling to guard against inadvertent
blockage. No elbow is required on the alternate combustion
air intake of upright installations, however, a minimum
clearance of 2 inches is required to assure proper air supply.
6. Upflow and Counterflow units.
For direct vent installations, secure field-supplied
combustion air intake pipe directly to the air intake coupling.
NOTE: A PVC coupling or elbow is required on counterflow
units.
1
REMOVE
2
4 SCREWS
REMOVE
2
REMOVE
AND CUT
3
REMOVE
REMOVE
3 SCREWS
AND
RELOCATE
ADDITIONAL
PLUG FROM
DRAIN KIT
UPFLOW
4
SECURE
TO CABINET
UPFLOW/HORIZONTAL SHOWN
(COUNTERFLOW SIMILAR)
Alternate Combustion Air Intake Location
N -D V (S
ON IRECT ENT INGLE
Non-direct vent installations require only a vent/flue pipe. The vent
pipe can be run horizontally with an exit through the side of the
building or run vertically with an exit through the roof of the build-
ing. The vent can also be run through an existing unused chim-
ney; however, it must extend a minimum of 12 inches above the
top of the chimney. The space between the vent pipe and the
chimney must be closed with a weather-tight, corrosion-resistant
flashing. For details concerning connection of the vent/flue pipe to
the furnace, refer to Section IX, Vent/Flue Pipe and Combustion
Air - Standard Furnace Connections or Alternate Furnace Connec-
tions for specific details. Refer to the following Non-Direct Vent
(Single Pipe) Piping - Vent/Flue Pipe Terminations for specific de-
tails on termination construction.
CAUTION
1
REMOVE 2" CLEARANCE
4 SCREWS REQUIRED
(NON-DIRECT
1
3
REMOVE
RELOCATE
COUNTERFLOW
5
P ) P
IPE IPING
Although non-direct vent installations do not require a combustion
air intake pipe, a minimum of one 90° elbow should be attached to
the furnace's combustion air intake if: an upright installation uses
the standard intake location, or a horizontal installation uses the
alternate air intake location. This elbow will guard against inad-
vertent blockage of the air intake.
V /F P
ENT LUE
Refer to the following table for applicable length, elbows, and pipe
diameter for construction of the vent/flue pipe system of a non-
direct vent installation. In addition to the vent/flue pipe, a single
90° elbow should be secured to the combustion air intake to pre-
vent inadvertent blockage. The tee used in the vent/flue termina-
tion must be included when determining the number of elbows in
the piping system.
Maximum Allowable Length of Vent/Flue Pipe (ft)
Unit Input
(BTU)
45,000
70,000
90,000
115,000
1) One 90° elbow should be secured to the combustion air intake con-
nection.
2) Minimum requirement for each vent pipe is five (5) feet in length and
5
one elbow/tee.
3) Tee used in the vent/flue termination must be included when determin-
ing the number of elbows in the piping system.
VENT)
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.
V /F P
ENT LUE
The vent/flue pipe may terminate vertically, as through a roof, or
horizontally, as through an outside wall.
3
.
Vertical vent/flue pipe terminations should be as shown in the fol-
AND
lowing figure. Refer to Section IX, Vent/Flue Pipe and Combustion
Air Pipe - Termination Locations for details concerning location re-
strictions. The penetration of the vent through the roof must be
sealed tight with proper flashing such as is used with a plastic plumb-
ing vent.
Horizontal vent/flue pipe terminations should be as shown in the
following figure. Refer to Section IX, Vent/Flue Pipe and Combus-
tion Air Pipe - Termination Locations for details concerning loca-
tion restrictions. A 2 3/8" diameter wall penetration is required 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 in-
stalled 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 in-
stalled on the inside and outside of the wall. The wall penetration
should be sealed with silicone caulking material.
In a basement installation, the vent/flue pipe can be run between
joist spaces. If the vent pipe must go below a joist and then up into
the last joist space to penetrate the header, two 45° elbows should
be used to reach the header rather than two 90° elbows.
16
L D
IPE ENGTHS AND IAMETERS
Non-Direct Vent (Single Pipe)
Pipe
Number of Elbows
(4)
Size
(inc.) 2 3 4
2 68 65 62
2 68 65 62
2 60 57 55
2 25 22 20
3 58 55 52
T
IPE ERMINATIONS
(1) (2)
(3) (5)
5 6 7 8
59 56 53 50
59 56 53 50
52 50 47 45
17 15 12 10
49 46 43 40