Lennox International Inc G61MP Series Units Typical Air Intake Pipe Connections, Figure Figure

TYPICAL AIR INTAKE PIPE CONNECTIONS

UPFLOW OR DOWNFLOW DIRECT VENT APPLICATIONS

(Right−Hand Exit in Upflow Application Shown)2−1/2", 3" OR

4

2

2

		2−1/2",
TRANSITION
		3" OR
	2	4
		TRANSITION

PLUG (Must be glued in place)

2

−36B−045−

−36B−070

−36B−071

−48C−090

−60C−090

−60C−091

2 2

−36B−045

−36B−070

−36B−071

−48C−090

−60C−090

−60C−091

−48C−110

−60C−110

−60C−111

*2"

−36B−045

−36B−070

−36B−071

−48C−090

−60C−090

−60C−091

−48C−110

−60C−110*

−60C−111*

−60D−135*

*Limit pipe length to 4" in G61MP−110, −111, −135 applications.

			FIGURE 25
TYPICAL AIR INTAKE PIPE CONNECTIONS				Follow the next three steps when installing the unit in Non-
				Direct Vent applications where combustion air is taken
HORIZONTAL DIRECT VENT APPLICATIONS
(Horizontal Right−Hand Air Discharge Application Shown)				from indoors and flue gases are discharged outdoors.
*Limit pipe	−36B−045
	−36B−070		2−1/2”,	TYPICAL AIR INTAKE PIPE CONNECTIONS
length to 4" in −110, −111,	−36B−071
−135 applications.	−48C−090		3” OR 4”	UPFLOW OR HORIZONTAL NON−DIRECT
	−60C−090				VENT APPLICATIONS
	−60C−091			(Right−Hand Exit in Upflow Application Shown)
	−48C−110
			TRANSITION
	−60C−110*
					6 in. Max.
	−60C−111		*2”
	−60D−135*
−36B−045			2−1/2”,
		2”	3” OR 4”
−36B−070
	2”
−36B−071				PLUG
−48C−090
−60C−090				(Must be
		TRANSITION		glued in	INTAKE
−60C−091
		2”		place)
−48C−110					DEBRIS
−60C−110			2”		SCREEN
−60C−111	−36B−045	2”			(Provided)
	−36B−070
	−36B−071
	−48C−090	2”
	−60C−090
	−60C−091

NOTE − Debris screen and elbow may be rotated, so that screen may be positioned to face forward, backward or downward.

FIGURE 27

FIGURE 26

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