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High altitude compensation – Bryant 583B User Manual

Page 18

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HIGH ALTITUDE COMPENSATION

NATURAL GAS ONLY

ORIFICE CONVERSION — 3.5 in. wg MANIFOLD PRESSURE*

*As the height above sea level increases, there is less oxygen per cubic ft of air.

Therefore heat input rate should be reduced at higher altitudes.

†Orifices available through your Bryant distributor.

LIQUID PROPANE ONLY

ORIFICE CONVERSION — 3.5 in. wg MANIFOLD PRESSURE*

*As the height above sea level increases, there is less oxygen per cubic ft of air.

Therefore, heat input rate should be reduced at higher altitudes.

†Orifices available through your Bryant distributor.

ALTITUDE (ft)

INPUT
(Btuh)

OUTPUT

(Btuh)

ORIFICE

NUMBER†

0-2000

40,000

31,000

#44

60,000

46,000

#38

90,000

70,000

#38

115,000

92,000

#33

130,000

103,000

#31

2001-4500

33,290

25,800

#49

49,930

38,300

#43

74,900

58,270

#43

95,700

76,560

#38

108,180

85,680

#36

4501-6000

31,310

24,270

#50

46,970

36,030

#44

70,450

54,810

#44

90,020

71,300

#40

101,760

80,590

#37

ALTITUDE (ft)

INPUT
(Btuh)

OUTPUT

(Btuh)

ORIFICE

NUMBER†

0-2000

40,000

31,000

#50

57,000

43,720

#46

85,500

66,520

#46

115,000

92,000

#42

127,000

100,580

#41

2001-4500

33,290

25,800

#53

47,430

36,380

#50

71,150

55,350

#50

95,700

76,560

#45

105,690

83,710

#44

4501-6000

31,310

24,270

NOT TO BE USED

ABOVE 4500 FT

44,620

34,220

#51

66,930

52,070

#51

90,020

72,020

#47

99,140

78,520

#45