Cooling Capacities, Units With Perfect Humidity Option - Bryant COMMERCIAL SINGLE PACKAGE ROOFTOP GAS HEAT/ELECTRIC COOLING 581B User Manual

581B036 (3 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
75
85
95
105
115
125
581B048 (4 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
72
TC 52.9
75 SHC 22.7
kW 2.87
TC 49.2
85 SHC 19.8
3.26
kW
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
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
PERFORMANCE DATA (cont)
COOLING CAPACITIES, UNITS WITH PERFECT HUMIDITY™ OPTION
Temp (F) Air Entering Evaporator — Cfm/BF
900/0.14
72 67
TC 41.3 37.3
SHC 17.5 22.4
kW 2.19 2.14
TC 38.6 34.4
SHC 15.2 20.1
kW 2.46 2.40
TC 35.9 31.4
SHC 13.0 17.9
kW 2.74 2.68
TC 33.8 29.7
SHC 10.9 15.8
kW 3.05 3.00
TC 31.8 28.0
SHC 9.0 13.7
kW 3.40 3.36
TC 28.7 26.3
SHC 6.9 12.2
3.78 3.73
kW
Temp (F) Air Entering Evaporator — Cfm/BF
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
1200/0.17
Temp (F) Air Entering Evaporator — Ewb
62 72 67
34.3 43.5 39.2 35.9
26.7 19.6 25.5 31.2
2.10 2.21 2.16 2.14
31.6 41.3 37.5 33.3
25.1 17.1 23.2 29.0
2.37 2.47 2.43 2.40
28.8 39.2 35.9 30.6
23.3 14.5 21.1 26.9
2.63 2.76 2.74 2.67
27.4 36.3 32.2 28.7
21.0 12.5 18.9 24.6
2.97 3.09 3.04 2.99
25.5 33.2 28.7 26.5
18.4 10.3 16.8 22.3
3.31 3.45 3.38 3.32
23.4 29.7 25.5 22.9
17.3 7.9 14.5 20.6
3.66 3.84 3.77 3.71
1450/0.19
Temp (F) Air Entering Evaporator — Ewb
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
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
t ldb = t edb –
t lwb = Wet-bulb temperature corresponding to enthalpy of air
leaving evaporator coil (h lwb )
h lwb = h ewb –
Where: h ewb = Enthalpy of air entering evaporator coil.
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).
22
1500/0.20
62 72 67 62
45.5 41.6 38.2
21.5 28.5 35.2
2.24 2.19 2.16
43.5 38.6 35.5
18.9 26.3 32.9
2.51 2.45 2.42
41.3 35.7 32.9
16.1 24.2 30.6
2.80 2.75 2.71
38.1 32.8 30.4
14.0 21.7 28.1
3.12 3.07 3.03
34.9 30.0 27.9
11.9 19.3 25.2
3.48 3.41 3.37
31.3 27.1 25.5
9.2 17.3 22.3
3.87 3.79 3.75
1600/0.21
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
sensible capacity (Btuh)
1.10 x cfm
total capacity (Btuh)
4.5 x cfm
2000/0.24
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