Bryant 549B User Manual
Page 84
84
PERFORMANCE DATA — 549B, 549C (cont)
COOLING CAPACITIES (cont)
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
t
lwb
= Wet-bulb temperature corresponding to enthalpy of air leav-
ing indoor coil (h
lwb
)
Where: h
ewb
= Enthalpy of air entering indoor coil
3. SHC is based on 80 F edb temperature of air entering indoor coil.
Below 80 F edb, subtract (corr factor x cfm) from SHC.
Above 80 F edb, add (corr factor x cfm) to SHC.
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
549B120 (10 Tons)
Temp (F)
Outdoor
Entering Air
(Edb)
Indoor Entering Air — Cfm/BF
3000/0.03
4000/0.04
5000/0.06
Indoor Entering Air — Ewb (F)
72
67
62
72
67
62
72
67
62
75
TC
136.0
124.0
111.4
141.2
129.0
116.6
145.6
132.0
121.2
SHC
64.6
80.8
96.0
71.2
92.4
111.8
78.6
103.2
121.0
kW
7.51
7.35
7.20
7.61
7.45
7.29
7.72
7.53
7.39
85
TC
132.6
119.6
106.6
137.6
124.4
112.0
140.4
127.4
118.0
SHC
63.6
79.2
94.0
70.6
91.4
110.0
77.0
102.6
118.0
kW
8.40
8.23
8.09
8.50
8.33
8.17
8.58
8.40
8.27
95
TC
127.8
114.6
99.4
133.2
119.4
107.2
136.2
121.8
114.2
SHC
62.2
77.6
90.8
69.6
89.8
107.0
76.8
101.2
113.8
kW
9.36
9.18
9.01
9.48
9.30
9.15
9.56
9.36
9.24
105
TC
122.4
108.8
92.0
127.4
113.6
101.4
130.4
116.0
109.6
SHC
60.4
75.4
87.4
68.0
88.0
101.4
75.4
99.4
109.4
kW
10.41
10.26
10.02
10.53
10.35
10.22
10.63
10.43
10.35
115
TC
116.8
101.8
86.6
121.2
106.6
94.8
123.6
109.2
104.6
SHC
58.6
72.8
84.6
66.0
85.4
94.8
73.4
97.0
104.6
kW
11.58
11.37
11.15
11.68
11.51
11.35
11.76
11.60
11.51
125
TC
110.6
95.8
84.6
114.6
98.4
88.8
117.0
100.8
96.4
SHC
56.4
70.6
83.4
64.4
82.4
88.8
71.4
93.8
96.4
kW
12.87
12.62
12.36
12.97
12.73
12.60
13.03
12.83
12.77
549C024 (2 Tons)
Temp (F)
Air Ent
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
600/0.11
800/.13
1000/.16
Air Entering Evaporator — Ewb (F)
62
67
72
62
67
72
62
67
72
75
TC
23.7
26
28.5
25.1
27.4
29.8
26.2
28.4
30.4
SHC
19.1
15.9
12.6
22.5
18.2
13.9
24.9
20.4
14.9
kW
1.22
1.23
1.25
1.23
1.24
1.26
1.23
1.25
1.26
85
TC
22.2
25.1
27.5
24
26.4
28.9
25.3
27.3
29.6
SHC
18.5
15.6
12.3
22
18
13.7
24.1
20.1
14.8
kW
1.4
1.42
1.43
1.42
1.43
1.45
1.42
1.43
1.45
95
TC
20
23.9
26.4
22.4
25.2
27.7
24.3
26
28.5
SHC
17.6
15.2
11.9
21.3
17.6
13.4
23.2
19.9
14.7
kW
1.6
1.63
1.64
1.62
1.63
1.65
1.63
1.64
1.66
105
TC
18.1
21.7
25.2
20.6
23.9
26.5
23
24.6
27.2
SHC
16.9
14.4
11.5
19.6
17.2
13.1
21.9
19.5
14.4
kW
1.81
1.85
1.87
1.84
1.86
1.88
1.86
1.87
1.89
115
TC
16.4
19.5
23.7
19.1
21.1
25
21
22.7
25.6
SHC
15.6
13.6
11.1
18.1
16.3
12.6
20
18.9
14
kW
2.05
2.09
2.12
2.08
2.1
2.13
2.1
2.11
2.14
125
TC
14.7
17
21.1
17.3
18.6
23.3
19.1
19.3
23.9
SHC
14
12.8
10.3
16.4
15.5
12.1
18.1
17.8
13.6
kW
2.3
2.34
2.38
2.34
2.35
2.4
2.36
2.36
2.41
BF
— Bypass Factor
Edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW
— Compressor Motor Power Input
SHC — Gross Sensible Heat Capacity (1000 Btuh)
TC
— Gross Total Capacity (1000 Btuh)
t
ldb
= t
edb
–
sensible capacity (Btuh)
1.10 x cfm
h
lwb
= h
ewb
–
total capacity (Btuh)
4.5 x cfm
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
549B
, 549
C