Bryant 583A User Manual
Page 17
PERFORMANCE DATA (cont)
HIGH ALTITUDE COMPENSATION
NATURAL GAS ONLY
ORIFICE CONVERSION — 3.5 in. wg MANIFOLD PRESSURE*
ALTITUDE (ft)
INPUT
(Btuh)
OUTPUT
(Btuh)
ORIFICE
NUMBER†
0-2000
40,000
32,040
#44
60,000
47,040
#38
90,000
71,910
#38
115,000
93,265
#33
130,000
104,390
#31
2001-4500
33,290
27,130
#49
49,930
40,690
#43
74,900
61,040
#43
95,700
78,000
#38
108,180
88,170
#36
4501-6000
31,310
25,520
#50
46,970
38,280
#44
70,450
57,420
#44
90,020
73,370
#40
101,760
82,930
#37
*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 distributor.
LIQUID PROPANE ONLY
ORIFICE CONVERSION — 3.5 in. wg MANIFOLD PRESSURE*
ALTITUDE (ft)
INPUT
(Btuh)
OUTPUT
(Btuh)
ORIFICE
NUMBER†
0-2000
40,000
33,200
#50
57,000
47,310
#46
85,500
70,965
#46
115,000
95,450
#42
127,000
105,410
#41
2001-4500
33,290
27,630
#53
47,430
39,370
#50
71,150
59,050
#50
95,700
79,430
#45
105,690
87,720
#44
4501-6000
31,310
25,990
NOT TO BE USED
ABOVE 4500 FT
44,620
37,030
#51
66,930
55,550
#51
90,020
74,720
#47
99,140
82,510
#45
*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 distributor.
17