Page 13
Venting Practices
1 − Use recommended piping materials for exhaust piping
(Class E / Class 12 / Schedule 40)
.
2 − Secure all joints so that they are gas-tight using ap-
proved cement.
Suspend piping using hangers at a minimum of every
1.52m (5 feet) for Schedule
40 vent pipe. A suitable
hanger can be fabricated
by using metal or plastic
strapping or a large wire tie.
3
− In areas where piping
penetrates joists or interi-
or walls, hole must be large enough to allow clearance
on all sides of pipe through center of hole using a
hanger.
4 − Isolate piping at the point where it exits the outside wall
or roof in order to prevent transmission of vibration to
the structure.
5 − When furnace is installed in a residence where unit is
shut down for an extended period of time, such as a
vacation home, make provisions for draining conden-
sate collection trap and lines.
Exhaust Piping (Figures 15 and 16)
NOTE − Two 50mm diameter street ells and two 80mm to
50mm reducers are contained in a bag assembly
strapped to the blower deck of 60C−110 and 60D−135
units. The street ells
must be
glued directly into the unit
flue collar. See figure 15. The 80mm to 50mm reducers
must be glued to the street ells i
n upflow or downflow
applications.
1 − Choose the appropriate side for venting in upflow or
downflow positions. Exhaust piping exits from the top
of the unit in horizontal air discharge applications.
Glue the field−provided exhaust vent pipe (or provided
street ell or reducing ell in upflow or downflow applica-
tions) to the flue collar. Refer to pipe and fittings speci-
fications and gluing procedures.
IMPORTANT
Exhaust piping and condensate trap must be
installed on the same side of the unit in upflow and
dowflow applications.
2 − All horizontal runs of exhaust pipe must slope back to-
ward unit. A minimum of 6mm (1/4") drop for each
305mm (12 inches) of horizontal run is mandatory for
drainage. Horizontal runs of exhaust piping must be sup-
ported every 1.5m (5 feet) using hangers.
NOTE − Exhaust piping should be checked carefully to
make sure there are no sags or low spots.
3 − On the opposite side of the cabinet, glue the provided
50mm vent plug into the unused flue collar.
4 − Route piping to outside of structure. Continue with
installation following instructions given in piping ter-
mination section.
CAUTION
Do not discharge exhaust into an existing stack or
stack that also serves another gas appliance. If verti-
cal discharge through an existing unused stack is re-
quired, insert PVC pipe inside the stack until the end
is even with the top or outlet end of the metal stack.
CAUTION
The exhaust vent pipe operates under positive pres-
sure and must be completely sealed to prevent leak-
age of combustion products into the living space.
FIGURE 14
STRAPPING
(metal, plastic
or large wire
ties)
