Lennox International Inc G61MP Series Units, Gas Units High Altitude Information, Order TWO Each

TABLE 13

Manifold Pressure (Outlet) inches w.c.

							Altitude (feet)
Model Number	Fuel	0−2000		2001−4500		4501−5500		5501−6500		6501−7500		7501−10000
		Low	High	Low	High	Low	High	Low	High	Low	High	Low	High
		Fire	Fire	Fire	Fiire	Fire	Fiire	Fire	Fiire	Fire	Fiire	Fire	Fiire
045, 070, 090, 110,	Natural	1.7	3.5	1.7	3.5	1.7	3.5	1.7	3.5	1.7	3.5	1.7	3.5
135	Propane	4.9	10.0	4.9	10.0	4.9	10.0	4.9	10.0	4.9	10.0	4.9	10.0
071, 091, 111	Natural	1.7	3.5	1.7	3.4	1.7	3.3	1.7	3.2	1.7	3.1	1.7	3.5
	Propane	4.9	10.0	4.9	10.0	4.9	10.0	4.9	10.0	4.9	10.0	4.9	10.0

High Altitude Information

NOTE − In Canada, certification for installations at eleva- tions over 4500 feet (1372 m) is the jurisdiction of local au- thorities.

The manifold pressure may require adjustment to ensure proper operation at higher altitudes. Refer to table 13 for proper manifold pressure settings at varying altitudes.

Refer to table 14 for required pressure switch changes and conversion kits at varying altitudes.

The combustion air pressure switches are factory−set and require no adjustment.

NOTE − A natural to L.P. propane gas changeover kit is nec- essary to convert this unit. Refer to the changeover kit installation instruction for the conversion procedure.

TABLE 14

Conversion Kit Requirements

	High Altitude	High Altitude Pressure Switch Kit			LPG/Propane Kit		LPG/Propane to
	Orifice Kit	ORDER TWO EACH					Natural Gas Kit
Input	Natural Gas
	Only
	7501−10,000 ft.	2000−4500 ft.	4501−7500 ft.	7501−10,000 ft.	0−7500 ft.	7501−10,000 ft.	0−7500 ft.	1 7501−10,000 ft.
−045	44W51	− − −	− − −	− − −	44W48	44W50	44W49	44W49 + 44W51
−070	44W51	− − −	− − −	56M06	44W48	44W50	44W49	44W49 + 44W51
−071	47M82	24W49	24W49	26W83	44W48	44W50	44W49	44W49 + 47M82
−090	44W51	− − −	75M22	56M21	44W48	44W50	44W49	44W49 + 44W51
−091	47M82	26W85	26W85	26W86	44W48	44W50	44W49	44W49 + 47M82
−110	44W51	− − −	− − −	75M22	44W48	44W50	44W49	44W49 + 44W51
−111	47M82	56M22	56M22	56M23	44W48	44W50	44W49	44W49 + 47M82
−135	44W51	− − −	56M93	56M93	44W48	44W50	44W49	44W49 + 44W51

1High Altitude Orifice Kit is required and must be ordered separately for applications from 7501 to 10,000 ft.

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