Nordyne SERIES M1B, AND M5S Furance Input, Heating Speed, Cooling Speed/ Evap Coil

FURNACE	ORIFICE SIZE AND				ALTITUDE - FEET
		SEA	2,000	3,000	4,000	5,000	6,000	7,000	8,000	9,000	10,000
MODEL	OUTPUT CAPACITY
		LEVEL
M1M/M1G	Orifi ce Size - Nat. Gas	29	29	30	30	30	30	31	31	31	32
	Orifi ce Size - LP	45	46	47	47	47	48	48	49	49	50
- 056
	Output - MBTUH	45.4	41.8	40.1	38.5	37.0	35.5	34.1	32.7	31.4	30.2
M1M/M1G	Orifi ce Size - Nat. Gas	24	25	26	27	27	28	28	29	29	30
	Orifi ce Size - LP	42	42	43	43	43	44	44	45	46	47
- 070
	Output - MBTUH	56.7	52.3	50.2	48.2	46.2	44.4	42.6	40.9	39.3	37.7
	Orifi ce Size - Nat. Gas	21	23	23	24	25	26	27	28	28	29
M1M - 077	Orifi ce Size - LP	40	41	42	42	42	43	43	44	44	45
	Output - MBTUH	61.7	56.9	54.6	52.4	50.3	48.3	46.4	44.5	42.7	41.0
	Orifi ce Size - Nat. Gas	21	23	23	24	25	26	27	28	28	29
M1G - 077	Orifi ce Size - LP	40	41	42	42	42	43	43	44	44	45
	Output - MBTUH	59.9	55.2	53.0	50.9	48.9	46.9	45.0	43.2	41.5	39.8
	Orifi ce Size - Nat. Gas	17	18	19	19	20	21	22	23	24	26
M1M - 090	Orifi ce Size - LP	36	37	38	38	39	40	41	41	42	43
	Output - MBTUH	71.7	66.1	63.5	60.9	58.5	56.1	53.9	51.7	49.7	47.7
	Orifi ce Size - Nat. Gas	17	18	19	19	20	21	22	23	24	26
M1G - 090	Orifi ce Size - LP	36	37	38	38	39	40	41	41	42	43
	Output - MBTUH	69.7	64.2	61.7	59.2	56.8	54.6	52.4	50.3	48.3	46.3
	Orifi ce Size - Nat. Gas	26	27	28	28	28	29	29	30	30	30
M1B - 066	Orifi ce Size - LP	43	44	44	44	45	45	46	47	47	48
	Output - MBTUH	52.6	48.5	46.6	44.7	42.9	41.2	39.6	38.0	36.5	35.0
	Orifi ce Size - Nat. Gas	18	19	19	20	21	22	23	24	26	27
M1B - 086	Orifi ce Size - LP	37	38	39	39	40	41	42	42	43	43
	Output - MBTUH	68.2	62.9	60.3	57.9	55.6	53.4	51.2	49.2	47.2	45.3

NOTES: For Canadian high altitude (2,000 - 4,500’), reduce gas manifold pressure to 3.0” W.C. for natural gas and 9” W.C. for LP gas. (Includes 4% Input Reduction for Each 1,000 Feet). These specs do not apply to oil furnace installations. Reference Sources: ANSI Z233.1 & NFPA 54, National Fuel Gas Code.

Table 11. Equivalent Orifice Sizes for High Altitude Installations

M1/M5*B Models and for use with Blower Kit No. 903773 1/4 Hp 3 Speed

Furance Input	Heating Speed			Cooling Speed/ Evap Coil
	Setting			2 Ton	2-1/2 Ton	3 Ton
086, 090		H		L	M	H
066, 070, 077		M		L	M	H
56		L		L	M	H
M1/M5*C Models and for use with Blower Kit No. 903413 1/2 Hp 4 Speed
	Heating			Cooling Speed/ Evap Coil
Furance Input	Speed		2 Ton	2-1/2 Ton & 3 Ton	3-1/2 Ton	4 Ton
	Setting
077, 086, 090	ML		L	ML	MH	H
056, 066, 070	L		L	ML	MH	H
M1/M5*D Models & for use with Blower Kit No. 903890 3/4 Hp 4 Speed
	Heating			Cooling Speed/ Evap Coil
Furance Input	Speed		2 Ton	2-1/2 Ton & 3 Ton	3-1/2 Ton & 4 Ton	5 Ton
	Setting
077, 086, 090	ML		L	ML	MH	H
056, 066, 070	L		L	ML	MH	H

Table 12. A/C Blower Speed Selection Chart

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