Lennox International Inc G61MP Series Units, Gas Units installation instructions Condensate Piping

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 22. Refer to figure 42 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.

sate trap should extend below the unit. A 5−1/2" service clearance is required for the condensate trap. Refer to fig- ure 44 for condensate trap locations.

CONDENSATE TRAP LOCATIONS

(Unit shown in upflow position)

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 8.

12" (305) ABOVE AVERAGE SNOW ACCUMULATION

1/2" (13) FOAM INSULATION

Horizontal	Horizontal
left and	right and
optional	optional
downflow	downflow

Optional	Optional
upflow	upflow

SIDE VIEW

NON−DIRECT VENT WALL RING TERMINATION

(15F74)

FIGURE 42

G61MP NON−DIRECT VENT APPLICATION

USING EXISTING CHIMNEY

SIZE TERMINATION							STRAIGHT−CUT OR
PIPE PER TABLE 8.						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 43

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-

FIGURE 44

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. DO NOT apply glue to secure condensate trap to cabinet. All other joints must be glued. See figure 45.

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 − The condensate trap provided with the unit is manufactured using ABS material. Use ABS to PVC transition solvent cement to glue a field−provided PVC coupling or PVC pipe to the trap. Install a tee and vent pipe near the trap.

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