Condensate Piping; Non−Direct Vent Wall Ring Termination; G61Mpv Non−Direct Vent Application Using Existing Chimney; Condensate Trap Locations - Lennox G61MPV Service Manual

Inches(mm)
UNCONDITIONED
SPACE
OUTSIDE WALL
PROVIDE SUPPORT
FOR EXHAUST LINES
EVERY 36" (914)
FIELD−PROVIDED
REDUCER MAY BE
REQUIRED TO
ADAPT LARGER
VENT PIPE SIZE TO
TERMINATION
1/2" (13) FOAM
INSULATION IN
UNCONDITIONED
SPACE
SIDE VIEW
NON−DIRECT VENT WALL RING TERMINATION
FIGURE 40
G61MPV NON−DIRECT VENT APPLICATION
USING EXISTING CHIMNEY
SIZE TERMINATION
PIPE PER TABLE 35.
3" − 8"
(76mm−
203mm)
MINIMUM 12"
MINIMUM
(305mm) ABOVE 12" (304mm)
ABOVE AVERAGE
AVERAGE SNOW
SNOW ACCUMULATION
ACCUMULATION
SHEET
METAL TOP
PLATE
INSULATE
TO FORM
SEAL
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 41

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 42 for condensate trap locations.
12" (305) Max. for 2" (51)
Unless Supported
SIZE TER-
MINATION
PIPE PER
TABLE 35.
12" (305) ABOVE
AVERAGE SNOW
ACCUMULATION
1/2" (13) FOAM
INSULATION
(15F74)
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
3" − 8"
(76mm−
203mm)
EXTERIOR
PORTION OF
CHIMNEY

CONDENSATE TRAP LOCATIONS

(Unit shown in upflow position)
Horizontal
left and
optional
downflow
Optional
upflow
NOTE − In upflow applications where side return
air filter is installed on same side as the conden-
sate trap, filter rack must be installed beyond
condensate trap to avoid interference.
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 43.
NOTE − In upflow and downflow applications, con-
densate trap must be installed on the same side as
exhaust piping.
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.
Page 59
Horizontal
right and
downflow
Optional
FIGURE 42
CAUTION
optional
upflow