Bryant COMMERCIAL SINGLE PACKAGE ROOFTOP GAS HEAT/ELECTRIC COOLING 581B User Manual page 19

581B060 (5 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
72
TC 70.8
75 SHC 34.1
kW 3.53
TC 68.9
85 SHC 33.5
kW 3.98
TC 66.8
95 SHC 32.8
kW 4.48
TC 64.3
105 SHC 32.0
kW 5.03
TC 61.5
115 SHC 31.0
kW 5.61
TC 58.7
125 SHC 30.0
kW 6.27
581B072 (6 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
72
TC 86.7
75 SHC 43.0
kW 4.58
TC 84.1
85 SHC 42.0
kW 5.10
TC 81.3
95 SHC 41.0
kW 5.65
TC 77.9
105 SHC 39.7
kW 6.22
TC 74.7
115 SHC 38.7
kW 6.84
TC 70.3
125 SHC 37.2
kW 7.43
Standard Ratings
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 (cont)
Temp (F) Air Entering Evaporator — Cfm/BF
1500/0.08
Temp (F) Air Entering Evaporator — Ewb (F)
67 62 72
65.4 58.5 72.5
42.7 49.9 35.7
3.49 3.44 3.55
63.2 55.3 70.5
41.8 48.4 35.0
3.94 3.87 4.00
60.6 52.4 68.3
40.7 47.0 34.5
4.43 4.35 4.50
57.7 49.9 65.9
39.6 45.8 33.7
4.96 4.87 5.05
54.8 47.3 62.8
38.4 44.5 32.5
5.55 5.46 5.62
51.6 44.5 59.9
37.2 43.1 31.7
6.19 6.09 6.28
Temp (F) Air Entering Evaporator — Cfm/BF
1800/0.05
Temp (F) Air Entering Evaporator — Ewb (F)
67 62 72
80.7 74.4 88.8
53.7 63.8 45.0
4.46 4.33 4.63
78.2 72.0 86.4
52.6 62.7 44.5
4.97 4.85 5.16
75.3 69.2 83.4
51.4 61.4 43.4
5.52 5.39 5.71
72.0 66.1 80.0
50.2 60.0 42.2
6.08 5.94 6.29
68.4 61.8 75.9
48.8 58.1 40.8
6.68 6.49 6.87
63.6 57.2 71.8
47.0 55.8 39.5
7.25 7.03 7.48
1750/0.09
67 62 72
67.3 61.1 73.0
45.5 54.2 36.8
3.50 3.46 3.55
65.1 57.9 72.2
44.8 52.8 37.0
3.96 3.90 4.03
62.5 54.3 69.3
43.8 51.1 36.0
4.45 4.37 4.51
59.8 51.7 66.9
42.8 49.7 35.3
4.99 4.90 5.06
56.7 49.1 64.0
41.6 48.2 34.4
5.58 5.49 5.65
53.4 46.2 60.8
40.4 46.2 33.3
6.21 6.13 6.29
2100/0.06
67 62 72
82.7 76.6 90.5
57.4 68.9 47.2
4.50 4.38 4.67
80.3 74.1 88.2
56.6 68.0 46.8
5.03 4.90 5.21
77.3 71.3 85.1
55.3 66.6 45.8
5.57 5.44 5.77
73.8 68.0 81.6
54.0 65.2 44.6
6.13 6.00 6.34
70.0 64.1 77.6
52.6 63.2 43.3
6.71 6.56 6.93
65.5 59.1 72.9
51.0 59.1 41.7
7.30 7.13 7.51
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
t = t –
ldb edb
t = wet-bulb temperature corresponding to enthalpy of air
lwb
leaving indoor coil (h
h = h
lwb ewb
Where h
ewb
3. The SHC is based on 80 F edb temperature of air entering evap-
orator coil.
Below 80 F db, subtract (corr factor x cfm) from SHC.
Above 80 F db, add (corr factor x cfm) to SHC.
Correction Factor = 1.10 x (1 – BF) x (db – 80).
19
2000/0.11
67 62 72
68.4 62.8 74.8
48.0 57.8 39.6
3.51 3.47 3.57
66.4 60.2 73.2
47.6 56.8 39.3
3.97 3.92 4.04
63.8 56.6 71.2
46.7 55.0 39.1
4.46 4.40 4.55
61.1 54.1 68.4
45.7 53.5 38.4
5.00 4.93 5.08
58.2 51.6 65.4
44.6 51.6 37.4
5.60 5.52 5.67
54.9 49.0 62.2
43.4 48.9 36.4
6.24 6.17 6.31
2400/0.06
67 62 72
84.4 78.2 92.6
61.2 73.6 51.2
4.55 4.41 4.72
81.7 75.7 90.2
60.2 72.5 50.6
5.06 4.93 5.26
78.9 72.9 87.2
59.2 71.2 50.2
5.62 5.48 5.83
75.3 69.6 83.4
57.8 69.3 49.0
6.17 6.04 6.40
71.3 66.5 78.7
56.4 66.4 46.9
6.75 6.63 6.96
66.8 61.9 74.0
55.0 61.9 45.4
7.35 7.22 7.54
sensible heat capacity (Btuh)
1.10 x cfm
)
lwb
total capacity (Btuh)
–
4.5 x cfm
= Enthalpy of air entering indoor coil.
2500/0.13
67 62
70.3 64.8
53.0 63.4
3.54 3.48
68.1 62.9
52.5 62.4
3.99 3.94
65.6 60.6
51.8 60.5
4.48 4.44
62.8 58.4
51.0 58.4
5.02 4.98
59.9 56.1
50.0 56.1
5.61 5.57
56.8 53.5
48.9 53.4
6.27 6.22
3000/0.08
67 62
86.3 81.0
67.4 80.7
4.58 4.47
84.0 78.8
67.4 78.7
5.12 4.99
80.6 76.2
65.8 76.2
5.66 5.55
77.1 73.2
64.5 73.2
6.22 6.12
73.0 70.1
63.2 70.0
6.80 6.72
68.6 66.4
61.8 66.3
7.41 7.33