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PERFORMANCE DATA
COOLING CAPACITIES
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).
580F036 (3 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
900/0.11 1200/0.14 1500/0.17
Air Entering Evaporator — Ewb (F)
72 67 62 72 67 62 72 67 62
75
TC 42.8 38.9 35.0 44.8 40.8 37.0 45.8 41.9 38.2
SHC 20.0 24.5 28.7 21.8 27.5 32.8 23.0 30.0 36.0
kW 2.91 2.81 2.70 2.99 2.88 2.78 3.02 2.92 2.82
85
TC 40.8 36.9 33.3 42.5 38.7 35.0 43.6 39.9 36.1
SHC 19.4 23.7 27.9 21.0 26.8 31.8 22.6 29.7 35.1
kW 3.14 3.01 2.90 3.20 3.08 2.97 3.24 3.14 3.02
95
TC 38.7 34.9 31.4 40.4
36.6 33.0 41.4 37.6 34.1
SHC 18.6 22.9 27.0 20.3
26.0 30.9 22.0 28.8 34.0
kW 3.35 3.21 3.09 3.42
3.29 3.16 3.47 3.35 3.22
105
TC 36.5 32.8 29.2 38.1 34.3 30.9 39.0 35.2 32.4
SHC 17.8 22.1 25.9 19.6 25.2 29.8 21.2 28.0 32.3
kW 3.55 3.41 3.27 3.63 3.49 3.35 3.68 3.54 3.43
115
TC 34.3 30.7 26.9 35.7 32.1 28.8 36.5 32.9 30.6
SHC 17.0 21.3 24.8 19.0 24.4 28.8 20.5 27.1 30.6
kW 3.76 3.60 3.45 3.84 3.68 3.54 3.88 3.74 3.64
580F048 (4 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
1200/0.12 1600/0.15 2000/0.18
Air Entering Evaporator — Ewb (F)
72 67 62 72 67 62 72 67 62
75
TC 57.9 53.1 48.3 60.4 55.9 51.3 62.2 57.3 52.9
SHC 27.2 33.3 39.2 29.4 37.2 44.8 31.4 40.3 49.1
kW 4.07 3.93 3.79 4.17 4.03 3.90 4.24 4.08 3.96
85
TC
55.7 50.8 45.3 57.7 53.4 48.5 59.4 55.0 50.2
SHC 26.4 32.5 37.8 28.4 36.7 43.6 30.5 40.3 47.9
kW 4.40 4.24 4.08 4.47 4.35 4.20 4.54 4.42 4.25
95
TC
52.9 48.1 42.5 55.2
50.5 45.7 56.7 52.0 47.4
SHC 25.5 31.5 36.4 27.6
35.6 42.2 29.7 39.2 46.7
kW 4.70 4.54 4.36 4.78 4.63 4.47 4.87 4.70 4.56
105
TC
50.1 45.3 39.8 52.3 47.6 42.8 53.6 48.9 44.9
SHC 24.4 30.3 35.1 26.7 34.5 40.7 28.8 38.1 44.6
kW 5.00 4.81 4.62 5.10 4.91 4.73 5.17 4.99 4.84
115
TC
47.3 42.6 37.2 49.3 44.6 40.0 50.5 45.9 42.4
SHC 23.4 29.2 33.7 25.9 33.3 39.3 27.8 37.1 42.4
kW 5.30 5.07 4.88 5.42 5.19 4.99 5.48 5.28 5.12
580F060 (5 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
1500/0.07 2000/0.09 2500/0.12
Air Entering Evaporator — Ewb (F)
72 67 62 72 67 62 72 67 62
75
TC 71.0 63.8 55.4 74.5 67.2 59.2 76.5 69.7 62.1
SHC 33.9 41.5 47.9 37.4 47.4 55.8 40.6 52.8 61.8
kW 5.04 4.82 4.62 5.20 4.97 4.76 5.29 5.06 4.87
85
TC 69.2 61.0 54.2 72.9 65.6 57.2 75.2 68.1 61.5
SHC 33.4 40.5 47.3 37.0 46.9 54.9 40.1 52.3 61.3
kW 5.50 5.27 5.02 5.66 5.41 5.18 5.75 5.50 5.29
95
TC 65.5 56.6 50.4 69.4
60.9 53.1 71.2 63.3 57.8
SHC 32.1 38.8 45.6 35.8
45.3 52.6 39.1 50.9 57.8
kW 5.88 5.62 5.37 6.01
5.76 5.53 6.12 5.87 5.67
105
TC 61.9 53.1 47.1 65.4 56.6 50.5 67.1 58.8 54.5
SHC 30.8 37.5 44.1 34.5 43.7 50.2 37.9 49.3 54.5
kW 6.25 5.99 5.72 6.38 6.13 5.91 6.50 6.23 6.06
115
TC 58.2 49.7 43.7 61.4 52.3 47.8 63.0 54.3 51.2
SHC 29.5 36.1 42.5 33.2 42.1 47.8 36.7 47.6 51.2
kW 6.63 6.35 6.08 6.75 6.49 6.29 6.88 6.59 6.46
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