Horizontal Venting; Vertical Venting - Nordyne M2RC-080 Installation Instructions Manual

CAUTION:
For optimal performance vent furnace
through wall which experiences the least
exposure to winter winds.
Horizontal Venting
Vent and combustion air intake terminations
must be as shown in Figure 18.
, WARNING:
Ensure thatthe combustion airvent and
the exhaust vent are configured as
shown in Fig. 18. Improper vent
termination can cause recirculation of
the flue gases. This may result in furnace
vibration. In severe cases, the furnace
will cycle, due to the intermittent contact
between the flame and the flame sensor.
If you note these oscillations occurring,
check the vent config u ration. Make sure
that the exhaust vent does not have a 90
degree termination.
pipe is then cut such that it can penetrate the
wall and be held in place by closely fitting
standard couplings. The face plates are re-
tained on both sides ofthewall bythe couplings,
end the gasket is retained against the wall by
the outer face plate. Face plates must be
fastened to the wall and the outside one must
be flashed as appropriate to prevent entry of
water.
When the above kits are not used the following
steps are required:
1. Check the hole size cut through the exte-
rior wall. Insure that the hole diameter is
less than the diameter of the couplings to
be used.
2. Extend the vent pipe through the wall
approximately 1" and seal the area be-
tween the wall and pipe.
3. Apply couplings to the vent pipe on the
interior and exterior sides of the wall to
insure the pipe can not be pushed or
pulled through the wall.
4. Insure the combustion air inlet pipe has a 90
degree termination elbow, and is pointing
downward as shown in Figures 18 & 19.
Note that a combustion air intake must be
provided with an elbow opening downward.
For horizontal venting, one of the following kits
is recommended:
J .. vc.or,zono, J J
Exterior Vent 9023750
Mounting Kit
For Canadian installations please refer to the
Canadian Installation Code (CAN/CGA-B149.1
or 2) and/or local codes.
The kit consists of two face plates and an
insulating gasket to seal the exterior surface.
A hole sized closely to the pipe diameter must
first be cut through the wall. A short length of
When the vent pipe must exit an exterior wall
close to the grade or expected snow level, a
riser should be provided as shown in Figure 17.
Insulation is required to prevent freezing of this
section of pipe.
Table 7 describes the maximum length of flue
pipe that can travel through an unconditioned
space or an exterior space. The total vent
length must not exceed the lengths noted on
Table 6.
Vertical Venting
Figure 19 shows the proper installation and
clearances for vertical vent termination. The
Maximum Flue Pipe Length in
Unconditioned and Exterior Spaces
20 45 7O
0 20 70
-20 10 60
_: = Insulation thickness greater than 3/8 inch, based on an R value
of 3.5 (ft*°F*hr)/(BTU*in)
Table 7. Vent Protection
17