Nordyne M1B, M1G, M1M Installation Instructions Manual page 32

FURNACE ORIFICE SIZE AND
MODEL OUTPUT CAPACITY
Orifi ce Size - Nat. Gas
M1M/M1G
Orifi ce Size - LP
- 056
Output - MBTUH
Orifi ce Size - Nat. Gas
M1M/M1G
Orifi ce Size - LP
- 070
Output - MBTUH
Orifi ce Size - Nat. Gas
M1M - 077 Orifi ce Size - LP
Output - MBTUH
Orifi ce Size - Nat. Gas
M1G - 077 Orifi ce Size - LP
Output - MBTUH
Orifi ce Size - Nat. Gas
M1M - 090 Orifi ce Size - LP
Output - MBTUH
Orifi ce Size - Nat. Gas
M1G - 090 Orifi ce Size - LP
Output - MBTUH
Orifi ce Size - Nat. Gas
M1B - 066 Orifi ce Size - LP
Output - MBTUH
Orifi ce Size - Nat. Gas
M1B - 086 Orifi ce Size - LP
Output - MBTUH
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 Orifi ce Sizes for High Altitude Installations
M1/M5*B Models and for use with Blower Kit No. 903773 1/4 Hp 3 Speed
Heating Speed
Furance Input
086, 090
066, 070, 077
56
M1/M5*C Models and for use with Blower Kit No. 903413 1/2 Hp 4 Speed
Heating
Furance Input Speed
Setting
077, 086, 090
056, 066, 070
M1/M5*D Models & for use with Blower Kit No. 903890 3/4 Hp 4 Speed
Heating
Furance Input Speed
Setting
077, 086, 090
056, 066, 070
Table 12. A/C Blower Speed Selection Chart
32
SEA
2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000
LEVEL
29 29
45 46
45.4 41.8 40.1 38.5 37.0 35.5 34.1 32.7 31.4 30.2
24 25
42 42
56.7 52.3 50.2 48.2 46.2 44.4 42.6 40.9 39.3 37.7
21 23
40 41
61.7 56.9 54.6 52.4 50.3 48.3 46.4 44.5 42.7 41.0
21 23
40 41
59.9 55.2 53.0 50.9 48.9 46.9 45.0 43.2 41.5 39.8
17 18
36 37
71.7 66.1 63.5 60.9 58.5 56.1 53.9 51.7 49.7 47.7
17 18
36 37
69.7 64.2 61.7 59.2 56.8 54.6 52.4 50.3 48.3 46.3
26 27
43 44
52.6 48.5 46.6 44.7 42.9 41.2 39.6 38.0 36.5 35.0
18 19
37 38
68.2 62.9 60.3 57.9 55.6 53.4 51.2 49.2 47.2 45.3
Setting
H
M
L
2 Ton 2-1/2 Ton & 3 Ton
ML L
L L
2 Ton 2-1/2 Ton & 3 Ton
ML L
L L
ALTITUDE - FEET
30 30 30 30
47 47 47 48
26 27 27 28
43 43 43 44
23 24 25 26
42 42 42 43
23 24 25 26
42 42 42 43
19 19 20 21
38 38 39 40
19 19 20 21
38 38 39 40
28 28 28 29
44 44 45 45
19 20 21 22
39 39 40 41
Cooling Speed/ Evap Coil
2 Ton 2-1/2 Ton
L M
L M
L M
Cooling Speed/ Evap Coil
3-1/2 Ton
ML MH
ML MH
Cooling Speed/ Evap Coil
3-1/2 Ton & 4 Ton
ML MH
ML MH
31 31 31 32
48 49 49 50
28 29 29 30
44 45 46 47
27 28 28 29
43 44 44 45
27 28 28 29
43 44 44 45
22 23 24 26
41 41 42 43
22 23 24 26
41 41 42 43
29 30 30 30
46 47 47 48
23 24 26 27
42 42 43 43
3 Ton
H
H
H
4 Ton
H
H
5 Ton
H
H