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35
PERFORMANCE DATA (cont)
COOLING CAPACITIES (cont)
Standard Ratings
LEGEND
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.
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
580F120 (10 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
3000/0.095 4000/0.125 5000/0.15
Air Entering Evaporator — Ewb (F)
72 67 62 72 67 62 72 67 62
75
TC 135.8 124.8 112.0 142.4 130.6 119.8 146.5 134.2 123.7
SHC 66.8 82.6 97.4 73.2 93.4 112.7 79.7 104.4 123.1
kW 9.76 9.41 9.10 10.00 9.61 9.27 10.17 9.75 9.41
85
TC 130.0 119.6 104.0 136.0 125.0 114.5 140.0 127.9 118.8
SHC 64.3 80.5 93.8 71.1 91.7 110.2 77.5 101.8 118.7
kW 10.41 10.07 9.74 10.67 10.28 9.94 10.84 10.41 10.09
95
TC 124.1 113.7 96.7 129.5
118.9 106.9 132.8 122.0 114.1
SHC 62.2 78.4 90.0 69.1
89.8 105.9 74.9 100.1 114.0
kW 11.13 10.78 10.40 11.38 10.99 10.63 11.52 11.14 10.83
105
TC 118.1 104.6 87.9 122.7 111.8 98.5 126.0 115.1 108.0
SHC 60.4 74.9 85.2 66.9 87.7 98.5 73.1 98.3 108.0
kW 11.93 11.52 11.10 12.13 11.74 11.41 12.27 11.89 11.65
115
TC 115.0 98.0 84.2 120.0 103.8 93.4 122.6 109.8 102.8
SHC 59.4 72.4 83.4 66.4 84.8 93.4 72.8 96.9 102.8
kW 12.26 11.82 11.40 12.48 12.06 11.78 12.60 12.20 12.00
580F121 (10 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
3000/0.095 4000/0.125 5000/0.15
Air Entering Evaporator — Ewb (F)
72 67 62 72 67 62 72 67 62
75
TC 138.2 127.0 114.0 145.0 132.9 122.0 149.1 136.6 125.9
SHC 68.0 84.1 99.1 74.5 95.1 114.7 81.1 106.3 125.3
kW 8.37 8.07 7.80 8.57 8.24 7.95 8.72 8.36 8.07
85
TC 132.3 121.7 105.9 138.4 127.2 116.6 142.5 130.2 120.9
SHC 65.5 81.9 95.5 72.4 93.3 112.2 78.9 103.6 120.8
kW 8.92 8.63 8.35 9.15 8.81 8.52 9.29 8.92 8.65
95
TC 126.3 115.7 98.4 131.8
121.0 108.8 135.2 124.2 116.1
SHC 63.3 79.8 91.6 70.3
91.4 107.8 76.2 101.9 116.0
kW 9.54 9.24 8.91 9.75 9.42 9.11 9.87 9.55 9.28
105
TC 120.2 106.5 89.5 124.9 113.8 100.3 128.3 117.2 109.9
SHC 61.5 76.2 86.7 68.1 89.3 100.3 74.4 100.1 109.9
kW 10.23 9.87 9.51 10.40 10.06 9.78 10.52 10.19 9.99
115
TC 117.1 99.8 85.7 122.2 105.7 95.1 124.8 111.8 104.6
SHC 60.5 73.7 84.9 67.6 86.3 95.1 74.1 98.6 104.6
kW 10.51 10.13 9.77 10.70 10.34 10.10 10.80 10.46 10.29
580F150 (12
1
/
2
TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
3750/0.08 4500/0.09 5000/0.10 6250/0.12
Air Entering Evaporator — Ewb (F)
72 67 62 72 67 62 72 67 62 72 67 62
75
TC 175.6 162.2 149.2 181.0 167.5 154.2 182.9 170.2 156.4 187.2 174.7 161.8
SHC 85.7 107.3 128.0 91.4 116.2 140.3 94.2 122.2 146.5 102.1 135.3 160.7
kW 11.16 10.85 10.57 11.32 11.00 10.69 11.37 11.07 10.73 11.49 11.19 10.87
85
TC 169.3 155.7 140.6 174.2 160.7 147.0 176.9 163.0 149.7 181.5 167.3 155.8
SHC 83.9 104.8 124.0 89.6 113.9 137.0 92.7 119.7 143.6 100.9 133.4 155.6
kW 12.15 11.78 11.42 12.31 11.94 11.58 12.39 12.01 11.63 12.53 12.14 11.82
95
TC 161.9 148.9 132.0 166.8
153.5 139.1 169.5 155.7 142.8 173.2 159.5 149.6
SHC 81.4 102.0 119.8 87.0
111.1 133.2 90.7 117.3 140.2 98.3 130.8 149.6
kW 13.12 12.72 12.28 13.30
12.89 12.46 13.40 12.97 12.56 13.54 13.11 12.78
105
TC 154.9 141.3 123.0 158.8 145.4 130.2 160.9 147.6 135.0 165.3 151.2 143.2
SHC 79.0 99.2 115.5 84.5 108.2 128.1 87.8 114.3 134.9 96.6 127.8 143.1
kW 14.16 13.66 13.17 14.31 13.82 13.35 14.38 13.91 13.48 14.58 14.07 13.77
115
TC 146.2 132.2 113.1 150.5 137.0 122.4 152.3 139.4 127.8 155.2 142.7 136.0
SHC 76.1 95.7 110.3 81.7 105.2 122.3 85.0 111.6 127.7 92.9 125.0 135.8
kW 15.09 14.57 14.07 15.30 14.76 14.25 15.37 14.87 14.43 15.49 15.02 14.73
BF — Bypass Factor
Edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW — Compressor Motor Power Input
Ldb — Leaving Dry-Bulb
Lwb — Leaving Wet-Bulb
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
BYPASS
FACTOR
(BF)
ENTERING AIR DRY-BULB TEMP (F)
79 78 77 76 75 under 75
81 82 83 84 85 over 85
Correction Factor
.05 1.04 2.07 3.11 4.14 5.18
Use formula
shown below.
.10 .98 1.96 2.94 3.92 4.90
.20 .87 1.74 2.62 3.49 4.36
.30 .76 1.53 2.29 3.05 3.82
580F036-151