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3. If exhaust piping must be run up a side wall to position
above snow accumulation or other obstructions, pip-
ing must be supported every 3 feet (.9m) as shown in
figure 12. Refer to figure 31 for proper piping method.
When exhaust piping must be run up an outside wall,
any reduction in exhaust pipe size must be done after
the final elbow.
FIGURE 31
12" (305) ABOVE
AVERAGE SNOW
ACCUMULATION
UNCONDITIONED
SPACE
1/2" (13) FOAM
INSULATION
1/2" (13) FOAM
INSULATION IN
UNCONDITIONED
SPACE
PROVIDE SUPPORT
FOR EXHAUST LINES
EVERY 36" (914)
OUTSIDE WALL
Inches(mm)
SIDE VIEW
NON−DIRECT VENT WALL RING TERMINATION
(15F74)
12" (305) Max. for 2" (51)
Unless Supported
SIZE TER-
MINATION
PIPE PER
TABLE 14.
FIELD−PROVIDED
REDUCER MAY BE
REQUIRED TO
ADAPT LARGER
VENT PIPE SIZE TO
TERMINATION
NOTE − Do not discharge exhaust gases directly into any chimney or vent stack. If ver-
tical discharge through an existing unused chimney or stack is required, insert piping
inside chimney until the pipe open end is above top of chimney and terminate as illus-
trated. In any exterior portion of chimney, the exhaust vent must be insulated.
FIGURE 32
3" − 8"
(76mm−
203mm)
3" − 8"
(76mm−
203mm)
MINIMUM
12" (304mm)
ABOVE AVERAGE
SNOW ACCUMULATION
STRAIGHT−CUT OR
ANGLE−CUT IN DIRECTION
OF ROOF SLOPE
EXHAUST VENT
1/2" (13mm)
WEATHERPROOF
INSULATION
SHOULDER OF FITTINGS
PROVIDE SUPPORT
OF PIPE ON TOP PLATE
EXTERIOR
PORTION OF
CHIMNEY
INSULATE
TO FORM
SEAL
SHEET
METAL TOP
PLATE
MINIMUM 12"
(305mm) ABOVE
AVERAGE SNOW
ACCUMULATION
SIZE TERMINATION
PIPE PER TABLE 14.
G61MP NON−DIRECT VENT APPLICATION
USING EXISTING CHIMNEY
Condensate Piping
This unit is designed for either right- or left-side exit of con-
densate piping in either upflow or downflow applications;
however, it must be installed on the same side of the unit as
the exhaust piping. In horizontal applications, the conden-
sate trap should extend below the unit. A 5−1/2" service
clearance is required for the condensate trap. Refer to fig-
ure for condensate trap locations.
FIGURE 33
CONDENSATE TRAP LOCATIONS
(Unit shown in upflow position)
Horizontal
left and
optional
downflow
Horizontal
right and
optional
downflow
Optional
upflow
Optional
upflow
1 − Determine which side condensate piping will exit the
unit. Remove plugs from the condensate collar at the
appropriate location on the side of the unit.
NOTE − The condensate trap is factory−shipped with
two rubber O−rings and two rubber clean−out caps
installed. Check to make sure that these items are in
place before installing the trap assembly.
2 − Install condensate trap onto the condensate collar.
Use provided HI/LO screws to secure two upper
flanges of the trap to the collar. Use provided sheet
metal screw to secure bottom trap flange to side of
unit. See figure 34.
NOTE − In upflow and downflow applications, con-
densate trap must be installed on the same side as
exhaust piping.
CAUTION
DO NOT use a power driver to tighten screws which
secure condensate trap to cabinet. Screws should
be hand−tightened using a screw driver to avoid the
possibility of damage to the trap assembly.
3 − Glue the field−provided coupling or pipe to the trap.
Install a tee and vent pipe near the trap.
NOTE − The condensate trap drain stubs (both sides)
have an outer diameter which will accept a standard
3/4" PVC coupling. The inner diameter of each stub
will accept standard 1/2" diameter PVC pipe.
NOTE − Vinyl tubing may be used for condensate
drain. Tubing must be 1−1/4" OD X 1" ID and should be
attached to the drain stubs on the trap using a hose
clamp.
4 − Glue the field−provided drain line to the tee. Route the
drain line to an open drain. As an alternate, clear vinyl
tubing may be used to drain condensate away from
the trap. Secure the vinyl tubing to the drain stubs on
the trap using a hose clamp. Do not overtighten the
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