Bryant LEGACY 580J User Manual
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Table 14 – COOLING CAPACITIES
2--Stage Cooling
20 TONS (con’t)
580J024 (20 TONS) --- UNIT WITH PERFECT HUMIDITY IN SUBCOOLING MODE
Temp (F) Air Ent
Condenser (Edb)
AIR ENTERING EVAPORATOR --- CFM/BF
6,000
8,000
10,000
Air Entering Evaporator --- --- Ewb (F)
72
67
62
72
67
62
72
67
62
75
TC
263.0
240.4
217.7
301.0
274.0
246.9
336.9
305.6
274.4
SHC
125.3
151.6
178.0
144.4
171.1
198.0
160.0
186.9
213.9
kW
15.63
15.20
14.65
15.91
15.62
14.98
16.26
15.92
15.21
85
TC
248.2
226.1
204.0
279.2
252.9
226.6
308.4
278.2
248.0
SHC
98.9
131.7
164.5
118.6
152.0
185.3
134.6
168.4
202.2
kW
17.50
17.04
16.50
17.74
17.51
16.75
18.08
17.73
17.03
95
TC
233.4
211.8
190.2
257.3
231.8
206.4
279.8
250.7
221.5
SHC
72.4
111.8
151.1
92.7
132.8
172.9
109.3
149.9
190.6
kW
19.36
18.96
18.35
19.61
19.37
18.67
20.02
19.62
18.97
105
TC
218.6
197.5
176.5
235.4
210.7
186.1
251.3
223.2
195.1
SHC
46.0
91.8
137.7
66.9
113.6
160.4
83.9
131.4
178.9
kW
21.23
20.76
20.18
21.53
21.22
20.52
21.91
21.52
20.77
115
TC
203.7
183.3
162.8
213.5
189.7
165.8
222.7
195.7
168.7
SHC
19.5
71.9
124.2
41.0
94.4
147.9
58.5
112.9
157.2
kW
23.02
22.58
22.02
23.42
23.02
22.38
23.73
23.41
22.57
580J024 (20 TONS) --- UNIT WITH Perfect Humidity IN HOT GAS REHEAT MODE
Temp (F) Air Ent
Condenser (Edb)
AIR ENTERING EVAPORATOR --- Ewb (F)
75 Dry Bulb
75 Dry Bulb
75 Dry Bulb
62.5 Wet Bulb
64 Wet Bulb
65.3 Wet Bulb
(50% Relative)
(56% Relative)
(60% Relative)
Air Entering Evaporator --- Cfm
6,000
8,000
10,000
6,000
8,000
10,000
6,000
8,000
10,000
80
TC
91.50
100.80
109.50
95.80
105.70
112.40
102.30
110.80
118.60
SHC
12.30
31.20
44.50
0.90
15.10
25.70
---6.50
3.60
13.90
kW
14.82
15.01
15.24
15.35
15.45
15.52
15.56
15.65
15.73
75
TC
94.00
103.40
112.00
98.70
108.10
115.10
104.70
113.10
121.10
SHC
13.60
32.40
45.70
2.00
16.00
26.60
---5.60
4.70
15.10
kW
14.90
15.07
15.33
15.43
15.56
15.64
15.69
15.77
15.85
70
TC
96.50
106.00
114.30
100.90
110.60
117.20
107.20
115.80
123.50
SHC
14.50
33.20
45.70
3.30
17.30
28.00
---4.00
5.90
16.20
kW
14.97
15.17
15.41
15.50
15.66
15.75
15.80
15.87
15.94
60
TC
101.80
111.30
119.30
106.20
115.60
122.20
112.60
119.40
128.00
SHC
16.70
35.50
48.60
5.60
19.40
30.30
---1.80
8.20
18.50
kW
15.14
15.32
15.58
15.66
15.88
15.97
16.05
16.10
16.19
50
TC
107.20
116.40
124.30
111.50
120.70
127.30
117.70
125.20
132.90
SHC
18.60
37.60
50.70
8.00
22.00
32.70
0.50
10.50
21.00
kW
15.27
15.46
15.76
15.81
16.10
16.23
16.27
16.34
16.41
40
TC
112.20
121.80
129.20
116.60
125.70
132.00
123.20
130.00
138.00
SHC
21.80
39.50
52.90
10.20
24.40
35.20
2.90
13.00
23.40
kW
15.42
15.63
15.93
15.96
16.32
16.44
16.52
16.57
16.65
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