Bryant 581A/B Product Information Manual page 102

COOLING CAPACITIES — UNITS WITH PERFECT HUMIDITY™ ADAPTIVE DEHUMIDIFICATION SYSTEM OPTION (cont)
581B150 (12 1 / TONS) — SUBCOOLING MODE
2
Temp (F)
Air Ent
Condenser
(Edb)
72
TC 156.3
75 SHC 66.6
kW 9.28
TC 147.6
85 SHC 58.7
kW 10.29
TC 138.9
95 SHC 50.8
kW 11.29
TC 129.1
105 SHC 42.1
kW 12.59
TC 119.2
115 SHC 33.5
kW 13.90
TC 109.4
125 SHC 24.8
kW 15.20
581B150 (12 1 / TONS) — HOT GAS REHEAT MODE*
2
Temp (F)
Air Ent
Condenser
(Edb)
3750
TC 43.54
80 SHC –4.36
kW 8.70
TC 44.45
75 SHC –3.84
kW 8.90
TC 45.36
70 SHC –3.32
kW 9.10
TC 47.17
60 SHC –2.28
kW 9.51
TC 48.98
50 SHC –1.24
kW 9.91
TC 50.79
40 SHC –0.20
kW 10.31
LEGEND
BF — Bypass Factor
Edb — Entering Dry Bulb
Ewb — Entering Wet Bulb
kW — Compressor Motor Power Input
SHC — Sensible Heat Capacity (1000 Btuh) Gross
TC — Total Capacity (1000 Btuh) Gross
*Negative SHC value indicates that the air entering the coil is being
heated.
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
PERFORMANCE DATA (cont)
3750/0.08
67 62 72
144.2 132.3 160.0
87.6 112.1 72.5
8.98 8.59 9.35
136.2 123.7 150.7
80.0 103.8 63.5
9.93 9.58 10.36
128.2 115.1 141.4
72.3 95.5 54.4
10.87 10.57 11.37
117.8 105.8 131.7
63.5 86.5 45.4
12.14 11.82 12.67
107.3 96.4 122.1
54.8 77.5 36.4
13.40 13.08 13.98
96.9 87.1 112.4
46.0 68.5 27.4
14.67 14.33 15.28
75 Dry Bulb
62.5 Wet Bulb
(50% Relative)
4300 5000 6250
45.21 47.05 49.78
0.76 6.50 15.20
8.70 8.70 8.70
46.02 47.75 50.32
0.96 6.36 14.53
8.90 8.90 8.90
46.82 48.45 50.86
1.17 6.21 13.85
9.10 9.10 9.10
48.44 49.84 51.93
1.59 5.93 12.50
9.51 9.51 9.51
50.05 51.24 53.00
2.00 5.64 11.15
9.91 9.91 9.91
51.67 52.64 54.07
2.41 5.35 9.80
10.31 10.31 10.31
Air Entering Evaporator — Cfm/BF
4300/0.09
Air Entering Evaporator — Ewb (F)
67 62 72
148.4 136.2 162.8
94.8 121.3 76.9
9.08 8.80 9.40
140.1 127.2 154.1
86.5 112.2 68.7
10.08 9.77 10.40
131.8 118.3 145.3
78.1 103.2 60.5
11.08 10.74 11.40
121.0 108.7 134.8
69.0 93.9 51.2
12.34 11.96 12.70
110.2 99.0 124.2
59.8 84.7 41.9
13.59 13.18 14.00
99.4 89.3 113.7
50.7 75.5 32.6
14.85 14.40 15.30
Air Entering Evaporator — Ewb (F)
75 Dry Bulb
64 Wet Bulb
(55% Relative)
Air Entering Evaporator — Cfm
3750 4300 5000
45.46 47.16 49.05
–9.51 –4.35 1.45
8.82 8.82 8.82
46.33 47.94 49.71
–8.66 –3.81 1.63
9.03 9.03 9.03
47.20 48.71 50.37
–7.81 –3.28 1.80
9.24 9.24 9.24
48.95 50.25 51.69
–6.12 –2.22 2.16
9.66 9.66 9.66
50.70 51.80 53.01
–4.43 –1.15 2.52
10.09 10.09 10.09
52.44 53.34 54.33
–2.73 –.019 2.87
10.51 10.51 10.51
2. The following formulas may be used:
t = t
ldb edb
t = Wet-bulb temperature corresponding to enthalpy of air
lwb
leaving evaporator coil (h
h = h
lwb ewb
Where: h
ewb
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.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
102
5000/0.11
67 62 72
150.6 138.2 169.0
99.6 127.5 87.0
9.18 8.9 9.43
140.8 127.9 161.1
91.0 118.1 77.7
10.34 10.03 10.45
131.0 117.6 153.1
82.3 108.7 68.5
11.50 11.1 11.46
119.9 107.7 140.9
74.2 101.3 57.7
12.67 12.28 12.79
108.8 97.8 128.7
66.1 93.8 46.8
13.83 13.41 14.11
97.7 87.8 116.5
58.0 86.4 36.0
15.00 14.54 15.44
75 Dry Bulb
65.3 Wet Bulb
(60% Relative)
6250 3750 4300
51.85 47.11 48.86
10.22 –13.97 –8.77
8.82 8.92 8.92
52.34 47.96 49.60
9.86 –12.84 –7.96
9.03 9.14 9.14
52.84 48.80 50.34
9.50 –11.71 –7.14
9.24 9.36 9.36
53.83 50.49 51.82
8.79 –9.45 –5.52
9.66 9.80 9.80
54.82 52.18 53.31
8.07 –7.18 –3.89
10.09 10.24 10.24
55.80 53.87 54.79
7.36 –4.92 –2.26
10.51 10.68 10.68
sensible capacity (Btuh)
–
1.10 x cfm
)
lwb
total capacity (Btuh)
–
4.5 x cfm
= Enthalpy of air entering evaporator coil.
6250/0.13
67 62
157.5 145.6
115.5 142.7
9.18 8.93
148.0 135.4
107.8 133.2
10.18 9.88
138.4 125.1
100.0 123.7
11.17 10.83
126.9 115.9
90.2 113.6
12.46 12.08
115.3 106.7
80.5 103.5
13.75 13.33
103.8 97.5
70.7 93.5
15.04 14.58
5000 6250
50.78 53.64
–2.93 5.90
8.92 8.92
51.41 54.10
–2.48 5.82
9.14 9.14
52.04 54.55
–2.02 5.74
9.36 9.36
53.29 55.47
–1.11 5.57
9.80 9.80
54.55 56.39
–0.19 5.41
10.24 10.24
55.80 57.30
0.72 5.24
10.68 10.68