Bryant 581A/B Product Information Manual page 36

580F151 (12 1 / TONS)
2
Temp (F)
3750/0.08
Air Entering
Condenser
(Edb)
72
TC 164.6
75 SHC 81.3
kW 10.24
TC 159.9
85 SHC 79.7
kW 11.38
TC 154.2
95 SHC 77.9
kW 12.59
TC 147.8
105 SHC 75.4
kW 13.84
TC 139.7
115 SHC 72.5
kW 15.03
TC 130.5
125 SHC 69.8
kW 16.32
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)
t = t –
ldb edb
1.10 x cfm
t = Wet-bulb temperature corresponding to enthalpy of air
lwb
leaving evaporator coil (h
PERFORMANCE DATA (cont)
COOLING CAPACITIES (cont)
4300/0.09
67 62 72
152.0 139.9 167.3
101.9 121.7 84.5
9.96 9.71 10.31
147.1 133.6 162.6
99.9 119.1 83.1
11.05 10.82 11.45
141.5 124.4 157.2
98.0 114.8 81.8
12.26 11.95 12.68
134.2 114.0 150.7
95.2 109.5 79.6
13.48 13.12 13.92
120.4 102.8 142.1
89.8 102.6 76.7
14.70 14.34 15.12
107.0 92.5 132.8
84.4 92.4 73.7
15.91 15.67 16.43
)
lwb
Air Entering Evaporator — Cfm/BF
5000/0.11
Air Entering Evaporator — Ewb
67 62 72
155.3 142.6 170.9
108.1 130.0 88.9
10.05 9.78 10.42
150.2 137.4 166.3
106.3 128.0 88.3
11.14 10.87 11.58
144.6 129.3 159.9
104.5 124.1 86.3
12.36 12.04 12.75
137.2 119.1 153.3
101.9 118.2 84.4
13.58 13.24 14.01
124.2 109.1 145.5
97.0 109.1 82.1
14.80 15.24 15.24
109.7 135.5 135.5
91.5 99.2 79.0
16.00 15.79 16.52
h = h
lwb ewb
Where: h = Enthalpy of air entering evaporator coil.
ewb
3. The SHC is based on 80 F edb temperature of air entering evaporator coil.
Below 80 F edb, subtract (corr factor x cfm) from SHC.
Above 80 F edb, add (corr factor x cfm) to SHC.
BYPASS
79
FACTOR
81
(BF)
.05 1.04
.10 .98
.20 .87
.30 .76
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
36
6250/0.13
67 62 72
158.2 146.2 173.9
115.9 139.8 96.7
10.12 9.84 10.50
153.0 141.3 169.5
114.1 137.7 96.1
11.20 10.97 11.66
147.6 134.5 164.0
112.5 133.8 94.4
12.44 12.15 12.88
140.4 136.4 156.4
110.6 126.5 92.2
13.69 13.37 14.06
127.5 117.1 148.4
105.7 116.6 90.4
14.90 14.65 15.35
112.7 105.0 138.2
99.9 104.9 87.7
16.11 15.97 16.59
total capacity (Btuh)
–
4.5 x cfm
ENTERING AIR DRY-BULB TEMP (F)
78 77 76 75 under 75
82 83 84 85 over 85
Correction Factor
2.07 3.11 4.14 5.18
1.96 2.94 3.92 4.90 Use formula
1.74 2.62 3.49 4.36 shown below.
1.53 2.29 3.05 3.82
67 62
162.0 151.0
128.7 150.8
10.23 9.95
156.8 147.1
127.4 146.9
11.32 11.08
150.9 142.3
125.8 142.2
12.54 12.31
143.7 136.7
124.0 136.6
13.80 13.58
133.2 128.1
120.1 128.0
15.04 14.86
121.1 118.3
114.6 118.3
16.21 16.10