Bryant 581A/B - Manual (Page 101)

101
PERFORMANCE DATA (cont)
COOLING CAPACITIES — UNITS WITH PERFECT HUMIDITY™ ADAPTIVE DEHUMIDIFICATION SYSTEM OPTION (cont)
LEGEND
*Negative SHC value indicates that the air entering the coil is being heated.
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
Where: h
ewb
= Enthalpy of air entering evaporator coil.
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.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
581B120 (10 TONS) — SUBCOOLING MODE
Temp (F)
Air Ent
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
3000/0.03 3200/0.03 4000/0.04 5000/0.04
Air Entering Evaporator — Ewb (F)
72 67 62 72 67 62 72 67 62 72 67 62
75
TC 134.3 122.5 111.4 135.8 124.3 113.0 138.4 129.5 123.5 143.3 136.5 130.2
SHC 60.0 76.1 93.7 61.3 79.1 97.4 68.0 89.5 109.4 75.2 100.9 123.3
kW 7.03 6.84 6.72 7.01 6.89 6.77 7.10 6.92 6.77 7.15 7.03 6.88
85
TC 127.6 115.4 104.6 128.9 118.1 107.0 132.5 121.5 116.6 137.2 128.0 122.9
SHC 51.5 68.8 87.2 53.9 72.0 91.2 61.0 82.7 102.4 68.6 93.6 115.9
kW 7.96 7.86 7.59 7.94 7.78 7.51 8.02 7.84 7.69 8.02 7.94 7.79
95
TC 120.9 108.3 97.8 121.9 111.8 101.0 126.5 113.4 109.7 131.1 119.4 115.5
SHC 43.0 61.5 80.6 46.5 64.8 84.9 53.9 75.9 95.4 62.0 86.2 108.4
kW 8.88 8.87 8.46 8.86 8.66 8.26 8.94 8.76 8.60 8.89 8.85 8.69
105
TC 112.0 99.9 90.4 113.1 103.2 93.4 117.2 105.0 100.7 122.1 110.5 105.9
SHC 36.1 54.1 73.8 38.8 57.8 78.9 45.6 68.2 86.8 53.0 78.3 99.7
kW 10.0 10.0 9.6 10.0 9.8 9.5 10.1 9.9 9.8 10.1 10.0 9.9
115
TC 103.0 91.5 83.1 104.3 94.6 85.9 107.8 96.7 91.7 113.0 101.6 96.4
SHC 29.2 46.7 66.9 31.2 50.7 72.9 37.3 60.6 78.3 44.0 70.3 90.9
kW 11.2 11.1 10.8 11.2 11.0 10.7 11.3 11.1 11.0 11.3 11.2 11.1
125
TC 94.1 83.1 75.7 95.5 86.0 78.3 98.5 88.3 82.7 104.0 92.7 86.8
SHC 22.3 39.3 60.1 23.5 43.7 66.8 29.0 52.9 69.7 35.0 62.4 82.2
kW 12.35 12.15 11.94 12.38 12.13 11.92 12.48 12.27 12.25 12.53 12.30 12.28
581B120 (10 TONS) — HOT GAS REHEAT MODE*
Temp (F)
Air Ent
Condenser
(Edb)
Air Entering Evaporator — Ewb (F)
75 Dry Bulb
62.5 Wet Bulb
(50% Relative)
75 Dry Bulb
64 Wet Bulb
(55% Relative)
75 Dry Bulb
65.3 Wet Bulb
(60% Relative)
Air Entering Evaporator — Cfm
3000 3200 4000 5000 3000 3200 4000 5000 3000 3200 4000 5000
80
TC 49.15 50.16 53.80 57.72 51.04 52.08 55.86 59.94 52.67 53.74 57.65 61.86
SHC 9.58 12.02 20.74 29.89 2.88 5.29 13.88 22.89 – 2.92 -0 .55 7.93 16.83
kW 7.39 7.38 7.38 7.37 7.45 7.45 7.44 7.43 7.50 7.50 7.49 7.49
75
TC 49.60 50.61 54.30 58.28 51.45 52.50 56.33 60.45 53.05 54.14 58.09 62.34
SHC 10.07 12.38 20.60 29.23 3.82 6.09 14.20 22.70 – 1.60 0.64 8.65 17.05
kW 7.56 7.56 7.55 7.55 7.63 7.63 7.62 7.62 7.69 7.69 7.69 7.68
70
TC 50.04 51.07 54.81 58.83 51.86 52.92 56.80 60.96 53.43 54.53 58.52 62.82
SHC 10.56 12.73 20.47 28.58 4.75 6.89 14.52 22.52 –0 .28 1.83 9.36 17.26
kW 7.73 7.73 7.72 7.72 7.81 7.81 7.81 7.80 7.89 7.88 7.88 7.87
60
TC 50.93 51.98 55.81 59.93 52.68 53.77 57.73 61.99 54.20 55.32 59.39 63.77
SHC 11.54 13.44 20.19 27.28 6.62 8.49 15.16 22.15 2.36 4.21 10.79 17.70
kW 8.07 8.07 8.07 8.06 8.18 8.18 8.17 8.17 8.27 8.27 8.26 8.26
50
TC 51.82 52.90 56.81 61.03 53.50 54.62 58.66 63.01 54.96 56.10 60.26 64.73
SHC 12.53 14.14 19.92 25.98 8.50 10.09 15.80 21.78 5.00 6.58 12.22 18.14
kW 8.42 8.42 8.41 8.41 8.54 8.54 8.54 8.54 8.66 8.65 8.65 8.65
40
TC 52.71 53.81 57.82 62.13 54.32 55.46 59.59 64.04 55.72 56.89 61.13 65.69
SHC 13.51 14.85 19.64 24.67 10.37 11.70 16.43 21.41 7.64 8.96 13.65 18.58
kW 8.76 8.76 8.76 8.75 8.91 8.91 8.91 8.90 9.04 9.04 9.04 9.03
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
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
5
81B0
36-
15
0