Special Case Venting - Trane S9V2B040U3PSBC/D Installation, Operation And Maintenance Manual

F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n
3 3 " " V V e e n n t t i i n n g g r r e e q q u u i i r r e e m m e e n n t t s s
I I m m p p o o r r t t a a n n t t : : To determine if your application requires 3"
venting, see the Maximum Vent Length
Table.
I I m m p p o o r r t t a a n n t t : : Horizontal venting application must use the
2" x 3" offset reducing coupling. Vertical
venting applications do not require the
reducing coupling to be offset.
N N o o t t e e : : If your furnace comes with a factory supplied 2"
X 3" offset reducing coupling it is used for 3"
vent pipe installation. Make sure the marking
"TOP" is located on the top side of the pipe in
horizontal venting applications. The straight side
of the coupling must be on bottom for proper
drainage of condensate.
LABEL
SAYS
"TOP"
CPL00938
FIELD SUPPLIED
2" COUPLING
2" TO 3" COUPLING
BAYREDUCE may be
used in Canadian
applications to meet
ULC-S636
N N o o t t e e : : For Canadian applications, BAYREDUCE 2" x 3"
offset reducing coupling meets ULC-S636
requirements. Make sure the marking "TOP" is
located on the top side of the pipe. The straight
side of the coupling must be on bottom for
proper drainage of condensate in horizontal
venting.
CPL00938
2" TO 3" COUPLING
FIELD SUPPLIED
2" COUPLING
CPL00938 IS FACTORY
SUPPLIED ONLY WITH THE
120,000 BTUH UPFLOW
FURNACE MODELS
40
CPL00938 IS FACTORY
SUPPLIED ONLY WITH THE
120,000 BTUH UPFLOW
FURNACE MODELS
BAYREDUCE may be
used in Canadian
applications to meet
ULC-S636

Special Case Venting

S S p p e e c c i i a a l l i i n n s s t t r r u u c c t t i i o o n n s s f f o o r r d d i i r r e e c c t t v v e e n n t t f f u u r r n n a a c c e e a a i i r r
i i n n t t a a k k e e . .
In certain applications, particularly when the furnace is
located in a basement, there are certain conditions that
can be met where warm humid air from the outside is
drawn into combustion air piping. If the area where the
piping is located is conditioned below 70° F,
condensation could occur inside the piping and
ultimately drain into the furnace compartment, which
could lead to premature component failure.
We recommend following one of the options to prevent
this condition from occurring and possibly damaging
components within the furnace:
N N o o t t e e : : Inlet air piping is not considered to be part of the
venting system. The inlet air piping may be
made from PVC.
O O p p t t i i o o n n 1 1
If possible, slope the inlet combustion air piping away
from the furnace. Condensation that may occur will
now drain outside of the home. The combustion air
outlet piping must remain sloped back to the furnace.
Option 1
Combustion air
exhaust
Combustion air
intake
Slope equals 1/4" per foot
Primary drain vent stack must
terminate below the bottom of
the condensate trap
To an approved
vented drain
S9V2-SVX001-1A-EN