Bryant LEGACY 580J User Manual
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Table 16 – COOLING CAPACITIES
2--Stage Cooling
25 TONS (con’t)
580J028 (25 TONS) --- UNIT WITH PERFECT HUMIDITY IN SUBCOOLING MODE
Temp (F) Air Ent
Condenser (Edb)
AIR ENTERING EVAPORATOR --- CFM/BF
7,500
10,000
12,500
Air Entering Evaporator --- --- Ewb (F)
72
67
62
72
67
62
72
67
62
75
TC
335.3
305.5
275.8
368.3
334.4
300.5
398.1
360.5
322.9
SHC
149.6
181.7
213.7
172.8
205.5
238.2
191.7
224.9
258.2
kW
19.50
18.70
17.70
19.50
18.70
17.70
19.70
18.80
17.90
85
TC
316.3
287.0
257.7
341.5
308.4
275.3
364.3
327.8
291.2
SHC
120.8
160.5
200.2
144.6
185.2
225.8
164.0
205.4
246.7
kW
21.90
21.30
20.10
22.30
21.30
20.30
22.50
21.70
20.60
95
TC
297.3
268.5
239.6
314.7
282.4
250.1
330.5
295.0
259.5
SHC
92.1
139.4
186.7
116.4
164.9
213.5
136.3
185.8
235.3
kW
24.30
23.50
22.50
24.40
23.50
22.60
24.40
23.60
22.50
105
TC
278.2
249.9
221.6
287.9
256.4
224.9
296.7
262.3
227.8
SHC
63.3
118.2
173.2
88.3
144.7
201.1
108.7
166.3
223.9
kW
26.70
26.00
25.00
27.30
26.00
25.00
27.30
26.10
25.10
115
TC
259.2
231.4
203.5
261.1
230.4
199.7
262.9
229.5
196.1
SHC
34.5
97.1
159.7
60.1
124.4
188.7
81.0
146.7
191.2
kW
28.70
28.00
27.10
29.30
28.10
26.90
29.10
27.90
27.20
580J028 (25 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
7,500
10,000
12,500
7,500
10,000
12,500
7,500
10,000
12,500
80
TC
132.40
136.80
148.40
138.20
142.40
154.60
144.30
146.40
162.50
SHC
37.80
61.50
85.50
21.80
44.40
52.40
16.10
32.10
48.90
kW
17.90
18.15
18.21
18.05
18.33
18.43
18.26
18.55
18.62
75
TC
138.00
142.20
154.10
143.50
148.00
160.30
148.90
151.00
167.10
SHC
44.20
68.00
91.80
28.10
51.50
58.80
22.70
38.20
56.00
kW
17.77
18.00
18.07
17.92
18.19
18.29
18.14
18.40
18.48
70
TC
143.80
148.10
160.00
149.30
154.00
165.90
155.50
157.60
173.80
SHC
50.50
73.80
98.10
34.20
56.50
65.30
28.30
44.00
62.30
kW
17.63
17.86
17.93
17.78
18.04
18.14
18.03
18.26
18.34
60
TC
154.80
159.50
171.10
160.20
165.20
177.20
166.70
168.80
185.10
SHC
63.10
84.50
110.10
46.50
69.50
75.70
41.40
56.50
74.30
kW
17.35
17.58
17.65
17.50
17.76
17.85
17.70
17.97
18.04
50
TC
166.30
170.50
181.20
171.30
176.40
188.40
178.00
180.00
196.40
SHC
75.80
96.50
122.20
58.30
79.80
87.80
53.70
69.10
85.90
kW
17.06
17.30
17.37
17.22
17.46
17.56
17.42
17.69
17.76
40
TC
177.50
181.70
192.30
182.40
187.60
199.70
189.30
191.20
207.70
SHC
85.70
109.80
134.30
71.50
92.30
100.50
66.10
79.50
97.90
kW
16.76
17.01
17.09
16.93
17.18
17.28
17.14
17.41
17.47
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