Bryant 581A/B Product Information Manual page 96

COOLING CAPACITIES — UNITS WITH PERFECT HUMIDITY™ ADAPTIVE DEHUMIDIFICATION SYSTEM OPTION (cont)
581B048 (4 TONS) — SUBCOOLING MODE
Temp (F)
Air Ent
Condenser
(Edb)
72
TC 52.9
75 SHC 22.7
kW 2.87
TC 49.2
85 SHC 19.8
kW 3.26
TC 45.8
95 SHC 17.2
kW 3.71
TC 41.6
105 SHC 13.5
kW 4.20
TC 37.2
115 SHC 9.9
kW 4.73
TC 32.4
125 SHC 7.2
kW 5.29
581B048 (4 TONS) — HOT GAS REHEAT MODE*
Temp (F)
Air Ent
Condenser
(Edb)
TC
80 SHC
kW
TC
75 SHC
kW
TC
70 SHC
kW
TC
60 SHC
kW
TC
50 SHC
kW
TC
40 SHC
kW
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)
1200/0.17
67 62 72
47.5 41.5 55.7
28.4 33.4 26.1
2.86 2.82 2.89
43.8 37.1 52.1
25.5 30.4 22.2
3.25 3.21 3.28
40.1 32.8 48.2
22.5 27.3 18.4
3.68 3.64 3.72
37.0 29.7 43.2
19.5 23.9 14.7
4.17 4.11 4.20
33.2 27.1 38.4
16.4 20.7 11.3
4.68 4.62 4.74
28.1 24.9 33.8
12.9 18.3 8.4
5.23 5.15 5.30
75 Dry Bulb
62.5 Wet Bulb
(50% Relative)
1200 1450 1600
12.13 14.30 15.43
1.01 1.60 1.90
2.76 2.76 2.76
13.25 15.28 16.34
1.60 2.14 2.43
7.54 7.54 7.57
14.37 16.27 17.26
2.18 2.69 2.96
2.70 2.70 2.70
16.60 18.24 19.10
3.35 3.79 4.03
2.64 2.64 2.64
18.83 20.22 20.94
4.51 4.89 5.09
2.59 2.59 2.59
21.06 22.19 22.78
5.68 5.99 6.16
2.53 2.53 2.53
Air Entering Evaporator — Cfm/BF
1450/0.19 1600/0.21
Air Entering Evaporator — Ewb (F)
67 62 72
50.9 47.5 57.0
34.1 38.9 25.9
2.87 2.84 2.89
47.2 43.6 52.9
29.5 35.8 22.4
3.26 3.23 3.28
43.6 39.4 48.8
24.8 32.6 19.0
3.69 3.67 3.72
38.9 35.4 43.9
21.7 29.2 15.0
4.17 4.14 4.20
34.0 30.8 39.4
18.5 25.6 11.2
4.71 4.64 4.73
28.1 27.4 35.3
14.5 21.9 16.8
5.25 5.19 5.29
Air Entering Evaporator — Ewb (F)
75 Dry Bulb
64 Wet Bulb
(55% Relative)
Air Entering Evaporator — Cfm
1200 1450
14.98 17.20
–0.18 0.41
2.75 2.75
15.96 18.05
0.50 1.05
7.61 7.64
16.94 18.90
1.17 1.69
2.70 2.70
18.91 20.60
2.52 2.97
2.65 2.65
20.87 22.30
3.86 4.25
2.60 2.60
22.84 24.00
5.21 5.53
2.55 2.55
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 = Enthalpy of air entering evaporator coil.
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).
96
2000/0.24
67 62 72
51.7 48.1 60.5
33.7 41.6 29.4
2.86 2.85 2.90
47.9 43.7 55.4
31.1 38.7 24.2
3.26 3.24 3.28
44.0 39.3 51.7
28.1 35.9 20.7
3.69 3.67 3.74
39.7 34.7 46.5
23.7 30.6 16.4
4.17 4.15 4.22
35.5 30.0 41.3
19.7 25.4 12.4
4.72 4.65 4.74
30.5 26.6 36.1
21.1 21.2 9.5
5.27 5.21 5.30
75 Dry Bulb
65.3 Wet Bulb
(60% Relative)
1600 1200 1450
18.36 17.44 19.71
0.72 –1.20 –0.61
2.75 2.74 2.74
19.14 18.31 20.44
1.34 –0.45 0.11
7.66 7.66 7.70
19.92 19.17 21.17
1.96 0.30 0.82
2.70 2.70 2.70
21.48 20.91 22.64
3.21 1.80 2.25
2.65 2.65 2.65
23.04 22.65 24.10
4.45 3.30 3.69
2.60 2.61 2.61
24.61 24.38 25.57
5.69 4.80 5.12
2.55 2.57 2.57
sensible capacity (Btuh)
1.10 x cfm
)
lwb
total capacity (Btuh)
4.5 x cfm
67 62
55.6 52.1
39.1 47.5
2.88 2.85
51.4 47.0
36.0 44.3
3.26 3.24
47.4 43.0
33.0 41.0
3.70 3.68
41.4 37.5
27.8 35.1
4.19 4.16
35.2 31.9
22.4 28.6
4.72 4.69
32.0 28.7
18.3 24.1
5.29 5.25
1600
20.90
–0.30
2.74
21.56
0.40
7.71
22.22
1.10
2.70
23.54
2.50
2.65
24.86
3.89
2.61
26.19
5.29
2.57