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.

CONDENSATE TRAP LOCATIONS

(Unit shown in upflow position)

Horizontal

Horizontal

left and

right and

optional

optional

downflow

downflow

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

12" (305) Max. for 2" (51) Unless Supported

SIZE TER-

MINATION

PIPE PER

TABLE 14.

12" (305) ABOVE AVERAGE SNOW ACCUMULATION

1/2" (13) FOAM INSULATION

Optional

Optional

upflow

upflow

FIGURE 33

1 − Determine which side condensate piping will exit the unit. Remove plugs from the condensate collar at the

SIDE VIEW

NON−DIRECT VENT WALL RING TERMINATION

(15F74)

FIGURE 31

G61MP NON−DIRECT VENT APPLICATION

USING EXISTING CHIMNEY

 

SIZE TERMINATION

 

 

 

STRAIGHT−CUT OR

 

PIPE PER TABLE 14.

 

 

ANGLE−CUT IN DIRECTION

 

 

 

 

OF ROOF SLOPE

 

 

 

 

 

 

 

3" − 8"

 

 

 

 

 

 

 

 

 

 

 

 

EXHAUST VENT

 

 

 

 

 

 

 

 

 

(76mm−

 

 

1/2" (13mm)

 

 

 

 

 

 

 

 

 

203mm)

 

 

 

 

 

 

 

 

 

 

 

 

 

WEATHERPROOF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MINIMUM12"

 

 

 

 

 

 

INSULATION

 

 

 

(305mm)12" (304mm)ABOVE

 

 

 

 

 

 

 

 

 

 

 

ABOVE AVERAGE

 

 

 

 

 

 

 

 

 

 

 

AVERAGE SNOW

 

 

 

 

 

 

 

 

 

 

 

SNOW ACCUMULATION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ACCUMULATION

 

 

 

 

SHOULDER OF FITTINGS

 

 

 

 

 

 

 

 

 

 

 

PROVIDE SUPPORT

 

 

 

 

 

 

 

 

 

 

OF PIPE ON TOP PLATE

 

 

 

 

 

 

 

SHEET

 

 

 

 

 

 

 

 

 

 

 

 

METAL TOP

 

 

 

 

 

 

 

 

 

 

 

 

PLATE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3" − 8"

 

 

 

 

 

 

 

 

 

(76mm−

 

 

 

 

 

 

 

 

 

203mm)

 

 

INSULATE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TO FORM

 

 

 

 

 

EXTERIOR

 

 

 

SEAL

 

 

 

 

 

PORTION OF

 

 

 

 

 

 

 

 

 

 

 

 

CHIMNEY

 

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

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.

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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Lennox International Inc specifications G61MP NON−DIRECT Vent Application Using Existing Chimney, Condensate Piping

G61MP specifications

Lennox International Inc. has long been a leader in HVAC solutions, and the G61MP gas furnace exemplifies the company's commitment to innovation and energy efficiency. This high-efficiency gas furnace operates with an Annual Fuel Utilization Efficiency (AFUE) of up to 96%, allowing homeowners to save significantly on energy costs while maintaining a comfortable indoor environment.

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