Bryant LEGACY 580J User Manual
Page 27
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Table 12 – COOLING CAPACITIES
2--Stage Cooling
17.5 TONS (con’t)
580J020 (17.5 TONS) --- UNIT WITH PERFECT HUMIDITY IN SUBCOOLING MODE
Temp (F) Air Ent
Condenser (Edb)
AIR ENTERING EVAPORATOR --- CFM/BF
5,250
7,000
8,750
Air Entering Evaporator --- --- Ewb (F)
72
67
62
72
67
62
72
67
62
75
TC
218.7
199.6
180.5
241.4
219.4
197.4
261.7
237.2
212.7
SHC
99.9
123.9
147.8
112.7
136.9
161.1
122.9
147.3
171.7
kW
11.81
11.56
11.20
13.81
13.48
13.16
14.82
14.58
14.16
85
TC
206.6
187.9
169.1
224.9
203.4
181.9
241.3
217.3
193.4
SHC
78.9
108.4
137.9
92.2
122.1
152.0
103.0
133.1
163.3
kW
13.18
12.53
12.53
15.18
14.85
14.52
16.21
15.85
15.54
95
TC
194.7
176.2
157.8
208.4
187.4
166.4
220.8
197.4
174.1
SHC
57.8
92.9
128.0
71.7
107.3
142.9
83.0
118.9
154.9
kW
14.56
14.21
13.88
16.56
16.21
15.87
17.56
17.22
16.01
105
TC
182.7
164.5
146.4
191.9
171.4
150.8
200.3
177.6
154.8
SHC
36.8
77.4
118.1
51.3
92.5
133.8
63.0
104.7
146.4
kW
15.93
15.58
15.20
17.94
17.58
17.22
18.95
18.59
18.24
115
TC
170.6
152.8
135.0
175.4
155.4
135.3
179.8
157.7
135.5
SHC
15.7
62.0
108.2
30.8
77.8
124.7
43.0
90.5
128.0
kW
17.31
16.95
16.58
19.32
18.95
18.58
20.32
19.96
19.59
580J020 (17.5 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
5,250
7,000
8,750
5,250
7,000
8,750
5,250
7,000
8,750
80
TC
82.20
90.50
92.40
86.70
96.40
97.80
91.60
99.80
101.20
SHC
18.20
29.40
41.60
8.60
17.20
27.50
0.50
9.30
13.20
kW
12.64
12.73
12.88
12.78
13.06
13.15
12.96
13.07
13.22
75
TC
84.40
92.70
94.40
88.80
98.60
99.70
93.70
102.00
103.40
SHC
19.70
31.30
43.50
10.10
18.80
29.20
12.10
10.80
15.30
kW
12.60
12.71
12.85
12.75
13.02
13.12
12.93
13.03
13.19
70
TC
86.70
94.90
96.60
91.00
100.70
102.00
95.90
104.10
105.40
SHC
21.30
32.80
44.80
11.60
20.40
30.70
3.80
12.30
16.50
kW
12.56
12.66
12.82
12.70
12.99
13.08
12.89
13.00
13.14
60
TC
90.90
99.10
100.80
95.20
105.00
106.30
100.20
108.30
109.70
SHC
24.80
36.00
48.20
14.90
23.90
35.90
7.20
15.60
19.60
kW
12.49
12.60
12.75
12.64
12.92
13.02
12.83
12.93
13.09
50
TC
95.00
103.40
105.10
99.50
109.40
110.50
104.40
112.50
113.90
SHC
28.10
39.30
51.30
18.20
27.20
37.40
10.30
18.90
23.20
kW
12.43
12.53
12.67
12.57
12.86
12.95
12.76
12.87
13.02
40
TC
99.20
107.70
109.30
103.70
113.70
114.70
108.60
116.70
118.10
SHC
31.40
42.50
54.40
21.30
30.40
40.50
13.40
22.00
26.50
kW
12.35
12.45
12.61
12.50
12.79
12.87
12.68
12.80
12.94
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