14
45 DEGREE
LONG-SWEEP
ELBOWS
V
E
N
T
Increased Clearance Configuration
NOTE:
Do not use other commercially available “no hub connec-
tors” due to possible material conflicts. The vent/flue pipe can also
be secured using a PVC or ABS elbow or coupling using the appro-
priate glue (see
Section IX, Materials and Joining Methods
.
NOTE: For non-direct vent installations, a minimum of one 90°
elbow should be installed on the combustion air intake coupling
to guard against inadvertent blockage.
C
OMBUSTION
A
IR
P
IPE
D
IRECT
V
ENT
I
NSTALLATIONS
On
upflow
units secure the combustion air intake pipe directly to the
air intake coupling.
NOTE:
Because of probable material conflicts,
do not use other commercially available “no hub connectors”.
N
ON
-D
IRECT
V
ENT
I
NSTALLATIONS
A minimum of one 90° elbow should be installed on the combustion
air intake “coupling” to guard against inadvertent blockage.
RUBBER
COUPLING
WITH WORM
GEAR CLAM PS
CO MBUS TION
AIR PIP E
(DIREC T VENT ON LY)
VE NT/F LUE
PIPE
(NON-DIRECT VENT)
90 PVC
ELB OW
(NON-DIRECT VENT)
STANDARD CONNECTIONS
O R
U PF LO W
A
LTERNATE
F
URNACE
C
ONNECTIONS
If the standard locations are undesirable for a specific installation,
alternate side panel locations are available for vent/flue pipe connec-
tions. These locations may be of particular benefit to upright upflow
installations requiring additional access to an
A
coil or to horizontal
installations desiring vent/flue piping run vertically from the side of the
cabinet.
NOTE:
Standard and alternate locations can be combined (i.e., an
installation may use the standard combustion air intake location but
use the alternate vent/flue location), if needed.
•
The combustion air intake termination of a direct vent
application should not terminate in an area which is
frequently dusty or dirty.
12"
Non-Direct Vent
Vent/Flue Termination
No Terminations
Above Walkway
12"
min.
4'
min.
Non-Direct Vent
Vent/Flue Termination
Direct Vent
Vent/Flue Termination
<10'
Forced Air
Inlet
Non-Direct Vent
&
Direct Vent
Vent/Flue Terminations
Grade or Highest
Anticipated
Snow Level
3' min.
12" min.
4' min.
12" min.
Vent Termination Clearances
NOTE:
In Canada, the Canadian Fuel Gas Code takes precedence
over the preceding termination restrictions.
C
ANADIAN
V
ENTING
R
EQUIREMENTS
In Canada, venting must conform to the requirements of the current
CAN/CSA-B149.1-05 Installation Code. Use only CSA-listed, ULC-
S636 compliant two-three-inch diameter PVC or ABS pipe, solvent
cement, and fittings throughout. The certified piping should be clearly
marked with the ULC Std “S636” on the pipe and fittings. Carefully
follow the pipe manufacturers’ instructions for cutting, cleaning, and
solvent cementing PVC and/or ABS.
The vent can be run through an existing unused chimney provided
the space between the vent pipe and the chimney is insulated and
closed with a weather-tight, corrosion-resistant flashing.
S
TANDARD
F
URNACE
C
ONNECTIONS
It is the responsibility of the installer to ensure that the piping connec-
tions to the furnace are secure, airtight, and adequately supported.
As shipped, attachment “couplings” for vent/flue and combustion air
intake pipe connections are provided on the furnace’s top cover
(upflow). To use the standard connections, field supplied vent/flue
pipe and combustion air intake pipe (when applicable) should be se-
cured directly to the furnace at these locations.
V
ENT
/F
LUE
P
IPE
Vent/flue pipe can be secured to the vent/flue coupling using the rub-
ber coupling and worm gear hose clamps provided with this furnace
(see “Standard Connections” figure). The rubber coupling allows
separation of the vent/flue pipe from the furnace during servicing.
Combustion Air and Vent piping should be routed in a manner to
avoid contact with refrigerant lines, metering devices, condensate
drain lines, etc. If necessary, clearances may be increased by uti-
lizing two 45 deg. Long-Sweep Elbows and creating an “S” joint to
provide additional space at connection locations. This joint can be
rotated on the fitting to establish maximum clearance between re-
frigerant lines, metering devices, and condensate drain lines, etc.
This joint is the equivalent of one 90 deg. elbow when considering
elbow count.
