Bryant 580D User Manual
Page 30
PERFORMANCE DATA (cont)
COOLING CAPACITIES (cont)
579F240 (20 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
6000/0.06
7000/0.07
8000/0.08
9000/0.09
10,000/0.10
Air Entering Evaporator — Ewb (F)
72
67
62
72
67
62
72
67
62
72
67
62
72
67
62
75
TC
274.0
250.0
226.0
280.0
256.0
232.0
284.0
260.0
236.0
288.0
264.0
242.0
292.0
268.0
246.0
SHC
130.4
163.6
194.4
136.4
175.0
210.0
144.4
186.8
224.0
151.8
197.0
236.0
157.4
208.0
246.0
kW
16.92
16.40
15.90
17.04
16.58
16.12
17.22
16.72
16.22
17.32
16.84
16.36
17.42
16.92
16.50
85
TC
264.0
240.0
216.0
270.0
244.0
222.0
276.0
250.0
226.0
278.0
254.0
232.0
282.0
256.0
238.0
SHC
127.6
159.8
189.8
138.2
172.2
206.0
141.8
183.4
220.0
147.8
194.6
232.0
154.6
204.0
236.0
kW
18.54
18.00
17.36
18.72
18.18
17.60
18.96
18.34
17.74
19.04
18.46
17.94
19.14
18.56
18.08
95
TC
252.0
228.0
204.0
258.0
234.0
210.0
262.0
238.0
216.0
266.0
240.0
222.0
270.0
242.0
228.0
SHC
124.4
155.4
184.6
131.0
167.6
200.0
138.8
178.8
214.0
145.2
189.8
222.0
151.8
200.0
228.0
kW
20.20
19.52
18.82
20.40
19.76
19.08
20.60
19.90
19.28
20.80
20.00
19.52
20.80
20.20
19.76
105
TC
240.0
216.0
190.6
246.0
222.0
196.6
250.0
226.0
204.0
252.0
228.0
212.0
256.0
230.0
218.0
SHC
120.0
150.8
178.4
127.2
163.6
193.8
135.0
175.2
204.0
141.6
185.4
212.0
147.4
196.2
218.0
kW
21.80
21.00
20.20
22.00
21.20
20.60
22.20
21.40
20.80
22.40
21.60
21.00
22.40
21.60
21.40
115
TC
228.0
204.0
176.6
232.0
208.0
184.6
236.0
212.0
194.2
238.0
214.0
202.0
240.0
216.0
208.0
SHC
116.0
146.2
171.8
123.8
158.4
184.6
130.4
169.6
194.2
137.2
180.8
202.0
144.0
190.8
206.0
kW
23.40
22.40
21.60
23.60
22.60
22.00
23.80
22.80
22.40
23.80
23.00
22.60
24.00
23.20
22.80
125
TC
214.0
188.8
163.2
218.0
194.2
174.2
220.0
197.6
183.4
224.0
199.8
190.6
226.0
202.0
196.0
SHC
111.0
140.8
162.8
118.6
153.4
174.2
125.8
164.8
183.4
132.0
175.6
190.4
139.0
185.2
195.4
kW
24.80
23.80
23.00
25.00
24.00
23.40
25.20
24.20
23.80
25.40
24.40
24.00
25.40
24.60
24.40
579F300 (25 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
7000/0.03
8750/0.05
10,000/0.07
11,250/0.09
Air Entering Evaporator — Ewb (F)
72
67
62
72
67
62
72
67
62
72
67
62
75
TC
323.9
299.4
275.8
331.3
312.7
288.4
336.1
319.8
294.7
342.6
322.5
300.0
SHC
159.4
195.2
230.6
170.1
216.5
259.1
177.6
231.1
276.8
186.6
242.9
292.6
kW
21.10
20.50
19.90
21.30
20.90
20.20
21.50
21.10
20.40
21.70
21.20
20.50
85
TC
315.3
290.4
264.3
326.9
303.2
278.0
333.7
309.1
285.0
335.1
314.2
291.1
SHC
156.3
191.7
224.9
168.4
213.2
254.9
177.5
226.9
273.8
184.4
240.7
288.4
kW
22.70
22.10
21.30
23.10
22.50
21.80
23.30
22.70
22.00
23.30
22.80
22.20
95
TC
304.1
277.4
243.1
315.3
290.1
263.8
320.4
295.6
271.1
324.1
300.6
279.4
SHC
152.0
186.5
215.2
165.0
208.5
248.0
173.0
222.4
266.4
181.6
236.5
279.4
kW
24.80
24.00
23.20
25.20
24.50
23.50
25.40
24.60
23.80
25.50
24.80
24.10
105
TC
291.2
261.4
224.8
300.9
274.2
242.1
305.7
280.3
252.3
309.8
284.8
266.3
SHC
147.2
179.7
206.6
159.9
201.8
237.3
168.3
216.8
252.3
176.8
231.1
266.3
kW
26.90
25.80
25.00
27.20
26.30
25.40
27.40
26.60
25.80
27.60
26.80
26.00
115
TC
274.6
237.9
207.6
285.9
251.5
222.6
291.3
258.4
237.7
293.9
267.5
247.1
SHC
140.9
170.0
198.6
154.9
193.2
222.6
164.1
208.7
237.7
163.0
224.3
247.1
kW
28.80
27.80
26.80
29.40
28.20
27.40
29.60
28.50
27.70
29.70
28.50
28.10
125
TC
254.5
214.9
184.3
266.7
230.9
206.7
272.0
236.0
220.8
276.1
240.0
231.1
SHC
133.3
160.8
184.3
148.0
185.1
206.7
157.5
200.2
220.8
166.6
214.4
231.1
kW
30.90
29.90
28.90
31.40
30.20
29.60
31.70
30.50
29.90
31.90
30.80
30.30
Standard Ratings
LEGEND
BF
— Bypass Factor
Edb
— Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW
— Compressor Motor Power Input
Ldb
— Leaving Dry-Bulb
Lwb — 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:
sensible capacity (Btuh)
tldb = tedb −
1.10 x cfm
tlwb = Wet-bulb temperature corresponding to enthalpy of air leav-
ing evaporator coil (hlwb)
total capacity (Btuh)
hlwb = hewb −
4.5 x cfm
Where: hewb = Enthalpy of air entering evaporator coil
3. The SHC is based on 80 F edb temperature of air entering evapo-
rator coil.
Below 80 F edb, subtract (corr factor x cfm) from SHC.
Above 80 F edb, add (corr factor x cfm) to SHC.
BYPASS
FACTOR
(BF)
ENTERING AIR DRY-BULB TEMP (F)
79
78
77
76
75
under 75
81
82
83
84
85
over 85
Correction Factor
.05
1.04
2.07
3.11
4.14
5.18
Use formula
shown below.
.10
.98
1.96
2.94
3.92
4.90
.20
.87
1.74
2.62
3.49
4.36
.30
.76
1.53
2.29
3.05
3.82
Interpolation is permissible.
Correction Factor = 1.10 x (1 − BF) x (edb − 80).
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