21. EQUIVALENT ORIFICE SIZES AT HIGH ALTITUDES

(Includes 4% Input Reduction for Each 1,000 Feet)

FURNACE

ORIFICE SIZE AND

 

 

 

 

ALTITUDE - FEET

 

 

 

MODEL

OUTPUT CAPACITY

SEA LEVEL

2000

3000

4000

5000

6000

7000

8000

9000

10000

 

ORIFICE SIZE - NAT. GAS

29

29

30

30

30

30

31

31

31

32

M1M/G 056

ORIFICE SIZE - LP

45

46

47

47

47

48

48

49

49

50

 

OUTPUT- MBTUH

45.4

41.8

40.1

38.5

37.0

35.5

34.1

32.7

31.4

30.2

 

ORIFICE SIZE - NAT. GAS

24

25

26

27

27

28

28

29

29

30

M1M/G 070

ORIFICE SIZE - LP

42

42

43

43

43

44

44

45

46

47

 

OUTPUT- MBTUH

56.7

52.3

50.2

48.2

46.2

44.4

42.6

40.9

39.3

37.7

 

ORIFICE SIZE - NAT. GAS

21

23

23

24

25

26

27

28

28

29

M1M 077

ORIFICE 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

 

ORIFICE SIZE - NAT. GAS

21

23

23

24

25

26

27

28

28

29

M1G 077

ORIFICE 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

 

ORIFICE SIZE - NAT. GAS

17

18

19

19

20

21

22

23

24

26

M1M 090

ORIFICE 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

 

ORIFICE SIZE - NAT. GAS

17

18

19

19

20

21

22

23

24

26

M1G 090

ORIFICE 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

 

ORIFICE SIZE - NAT. GAS

26

27

28

28

28

29

29

30

30

30

M1B 066

ORIFICE 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

 

ORIFICE SIZE - NAT. GAS

18

19

19

20

21

22

23

24

26

27

M1B 086

ORIFICE 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

Table 12. High Altitude

Reference Sources: ANSI Z233.1 & NFPA 54, National Fuel Gas Code.

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.

NOTE: Do not attempt to change the size of an orifice by drilling it out. To do so will void the manufacturer’s warranty

INSTALLER: Please leave these installation instructions with the homeowner.

¢708672;¤

O’Fallon, MO

7086720

7086720 (Replaces 708074E)

Specifications and illustrations subject to change without notice and without incurring obligations.

Printed in U.S.A. (12/06)

Page 40
Image 40
Nordyne M1G, M1B, M1S, M1M owner manual Equivalent Orifice Sizes AT High Altitudes

M1M, M1S, M1B, M1G specifications

Nordyne, a renowned player in the HVAC industry, has introduced a range of high-efficiency gas furnaces, including the M1S, M1G, M1B, and M1M models. Each of these furnaces is designed to provide efficient heating solutions tailored to the needs of homeowners.

The M1S series is well-known for its reliability and performance. It features a single-stage heating process that delivers consistent warmth to any space. With its multi-speed blower, the M1S ensures quiet and comfortable airflow, adapting seamlessly to varying temperature demands. Its robust construction coupled with an energy-efficient design makes it an ideal choice for those looking for dependable heating without sky-high utility bills.

The M1G model steps it up with a two-stage heating system that offers enhanced comfort and efficiency. By operating at a lower speed during milder conditions, the M1G can effectively reduce energy consumption while still maintaining a cozy environment. It is equipped with a variable-speed blower that not only enhances efficiency but also minimizes noise, making it perfect for residential areas. The M1G is designed with advanced safety features, including an integrated control board that monitors furnace functions to ensure optimal performance.

For those seeking a budget-friendly option without compromising on quality, the M1B model provides a solid performance with its straightforward, reliable single-stage heating. While it may lack some of the advanced features found in higher-end models, the M1B is built for ease of use with straightforward controls and maintenance, making it a great option for families.

The M1M model integrates cutting-edge technology with a focus on maximum efficiency. Featuring a modulating gas valve, this model can adjust its output based on real-time heating requirements. This adaptability ensures that the furnace operates at peak efficiency, significantly lowering energy bills and improving overall comfort. The M1M also boasts advanced diagnostic capabilities that allow for easy troubleshooting, thus reducing maintenance time and costs.

In summary, Nordyne's M1 series furnaces—M1S, M1G, M1B, and M1M—offer a range of options to meet diverse heating needs. With technologies designed for efficiency, reliability, and comfort, Nordyne continues to solidify its reputation as a leader in the HVAC market, providing homeowners with effective heating solutions tailored to their lifestyles and budgets.