Bryant LEGACY LINE 580J User Manual
Page 39
39
Table 23 – COOLING CAPACITIES
2--STAGE COOLING (RTPF ONLY)
7.5 TONS
580J08 COOLING CAPACITIES, UNIT WITH PERFECT HUMIDITY SYSTEM IN SUBCOOLING MODE
TEMP (F) AIR ENT
CONDENSER (Edb)
AIR ENTERING EVAPORATOR --- CFM
2250/0.05
3000/0.07
3750/0.09
Air Entering Evaporator --- Ewb (F)
72
67
62
72
67
62
72
67
62
75
TC
103.05
93.02
83.60
109.77
99.52
90.08
114.01
103.69
95.19
SHC
43.66
55.34
67.09
50.99
66.29
81.31
57.49
76.27
92.20
kW
4.90
4.83
4.77
4.82
4.88
4.96
4.99
4.91
4.85
85
TC
95.39
85.83
76.88
101.59
91.89
82.95
105.53
95.76
87.77
SHC
36.42
48.47
60.60
43.24
58.99
74.40
49.44
68.68
84.90
kW
5.49
5.42
5.36
5.40
5.47
5.54
5.58
5.50
5.44
95
TC
87.48
78.44
69.97
93.21
84.05
75.61
96.84
87.63
80.14
SHC
28.98
41.46
53.97
35.32
51.53
67.34
41.21
60.92
77.41
kW
6.16
6.09
6.03
6.08
6.14
6.21
6.24
6.17
6.11
105
TC
79.35
70.83
62.84
84.57
75.96
68.04
87.88
79.23
72.26
SHC
21.34
34.26
47.18
27.17
43.86
60.08
32.73
52.95
69.70
kW
6.93
6.86
6.81
6.85
6.91
6.97
7.00
6.93
6.88
115
TC
70.87
62.89
55.42
75.58
67.54
60.15
78.56
70.51
64.06
SHC
13.40
26.79
40.14
18.70
35.89
52.54
23.94
44.68
61.67
kW
7.79
7.74
7.69
7.73
7.78
7.83
7.86
7.80
7.76
580J08 COOLING CAPACITIES, UNIT WITH PERFECT HUMIDITY SYSTEM IN HOT GAS REHEAT MODE
TEMP (F) AIR ENT
CONDENSER (Edb)
AIR ENTERING EVAPORATOR --- Ewb (F)
75 Dry Bulb
62.5 Wet Bulb
(50% Relative)
75 Dry Bulb
64 Wet Bulb
(56% Relative)
75 Dry Bulb
65.3 Wet Bulb
(60% Relative)
Air Entering Evaporator --- Cfm
2250
3000
3750
2250
3000
3750
2250
3000
3750
80
TC
27.60
32.75
30.19
40.09
39.43
37.73
45.06
45.25
44.25
SHC
---3.12
5.20
6.71
3.75
5.24
6.75
3.77
5.26
6.78
kW
4.56
4.51
4.46
4.63
4.60
4.56
4.70
4.67
4.64
75
TC
35.40
33.78
31.20
41.14
40.51
38.80
46.15
46.37
45.38
SHC
4.67
6.17
7.69
4.71
6.21
7.73
4.74
6.24
7.76
kW
4.41
4.36
4.39
4.41
4.36
4.36
4.41
4.39
4.36
70
TC
36.36
34.71
32.18
42.10
41.47
39.77
47.08
47.31
46.32
SHC
5.63
7.14
8.66
5.67
7.18
8.71
5.70
7.21
8.74
kW
4.43
4.49
4.41
4.44
4.40
4.39
4.49
4.47
4.44
60
TC
38.25
36.64
34.15
43.97
43.37
41.72
48.98
49.22
48.26
SHC
7.56
9.09
10.62
7.60
9.13
10.66
7.62
9.15
10.69
kW
4.56
4.55
4.43
4.57
4.53
4.46
4.56
4.55
4.50
50
TC
40.15
38.60
36.14
45.95
45.37
43.73
50.57
50.97
49.56
SHC
9.48
11.03
12.58
9.52
11.07
12.62
9.54
11.10
12.64
kW
4.63
4.52
4.38
4.45
4.41
4.33
5.25
4.91
5.60
40
TC
42.18
40.62
38.11
47.80
47.25
45.43
52.65
52.75
51.83
SHC
11.41
12.98
14.54
11.45
13.02
14.58
11.47
13.04
14.60
kW
4.32
4.37
4.37
4.65
4.60
4.89
4.96
5.20
5.12
NOTE: Perfect Humidity only available on 2---stage RTPF models.
LEGEND
Edb --- Entering Dry---Bulb
Ewb --- Entering Wet---Bulb
kW
--- Compressor Motor Power Input
Idb
--- Leaving Dry---Bulb
Iwb --- Leaving Wet---Bulb
SHC --- Sensible Heat Capacity (1000 Btuh) Gross
TC
--- Total Capacity (1000 Btuh) Gross
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
t
ldb
= t
edb
–
sensible capacity (Btuh)
1.10 x cfm
t
lwb
= Wet---bulb temperature corresponding to enthalpy of air
leaving evaporator coil (h
lwb
)
h
lwb
= h
ewb
–
total capacity (Btuh)
4.5 x cfm
Where: h
ewb
= Enthalpy of air entering evaporator coil
580J