User Guide

92
PERFORMANCE DATA
COOLING CAPACITIES, STANDARD UNITS
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.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
581B036 (3 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
900/0.14 1200/0.17 1500/0.20
Air Entering Evaporator — Ewb
72 67 62 72 67 62 72 67 62
75
TC 41.9 38.7 35.7 43.5 40.8 37.7 44.8 41.8 39.0
SHC 20.4 25.2 29.7 21.8 28.2 33.8 23.3 30.7 37.0
kW 2.19 2.16 2.12 2.21 2.18 2.15 2.23 2.19 2.16
85
TC 40.7 37.5 34.5 42.1 39.3 36.4 43.5 40.4 37.6
SHC 19.9 24.7 29.2 21.5 27.7 33.2 23.2 30.3 36.4
kW 2.46 2.42 2.39 2.47 2.44 2.41 2.50 2.45 2.42
95
TC 39.3 36.1 33.1 40.8
37.8 34.9 42.0 38.9 36.1
SHC 19.5 24.1 28.4 21.1
27.2 32.5 22.8 29.9 35.6
kW 2.75 2.71 2.66 2.77 2.73 2.69 2.79 2.74 2.71
105
TC 37.7 34.6 31.7 39.3 36.2 33.4 40.1 37.2 34.7
SHC 18.8 23.5 27.8 20.7 26.6 31.8 22.1 29.3 34.7
kW 3.06 3.02 2.98 3.09 3.04 3.01 3.10 3.06 3.03
115
TC 36.0 33.0 29.7 37.4 34.5 31.5 38.1 35.5 33.2
SHC 18.3 22.9 26.7 19.9 26.1 30.9 21.3 28.7 33.2
kW 3.41 3.36 3.31 3.43 3.39 3.34 3.44 3.41 3.37
125
TC 34.2 31.3 27.8 35.6 32.7 29.4 36.3 33.6 31.9
SHC 17.6 22.2 25.8 19.4 25.4 29.4 20.8 28.0 31.8
kW 3.78 3.73 3.66 3.80 3.76 3.71 3.81 3.78 3.75
581B048 (4 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
1200/0.17 1450/0.19 1600/0.21 2000/0.24
Air Entering Evaporator — Ewb (F)
72 67 62 72 67 62 72 67 62 72 67 62
75
TC 54.0 50.7 44.2 55.9 52.2 47.7 56.4 52.8 49.1 58.1 54.5 50.6
SHC 26.1 32.7 37.5 27.6 35.1 41.8 28.2 36.2 43.8 30.2 39.5 47.5
kW 2.81 2.80 2.76 2.83 2.81 2.78 2.83 2.80 2.79 2.84 2.82 2.79
85
TC 52.2 48.9 41.9 54.1 50.4 45.9 54.5 51.0 47.2 55.3 52.3 48.7
SHC 25.4 32.0 36.4 26.9 34.5 40.8 27.5 35.7 42.8 28.6 38.5 46.6
kW 3.20 3.19 3.15 3.22 3.20 3.17 3.22 3.20 3.18 3.22 3.20 3.18
95
TC 50.7 46.9 39.5 51.9
48.4 43.5 52.5 48.9 45.2 53.9 50.1 46.7
SHC 24.9 31.1 35.0 26.1
33.6 39.6 26.8 34.7 41.8 28.8 37.5 45.6
kW 3.64 3.61 3.57 3.65 3.62 3.60 3.65 3.62 3.60 3.67 3.63 3.61
105
TC 48.8 44.5 36.7 49.8 46.2 40.7 50.2 46.7 42.1 51.5 48.2 44.7
SHC 24.3 30.2 33.6 25.3 32.8 38.2 26.0 33.9 40.3 27.9 37.4 44.4
kW 4.12 4.09 4.03 4.12 4.09 4.06 4.12 4.09 4.07 4.14 4.11 4.08
115
TC 46.5 41.1 34.3 47.7 43.3 37.0 48.0 44.4 38.5 48.9 45.7 42.0
SHC 23.4 28.9 32.4 24.9 31.8 36.3 25.4 33.4 38.3 27.1 36.9 42.0
kW 4.64 4.59 4.53 4.65 4.62 4.55 4.64 4.63 4.56 4.65 4.63 4.60
125
TC 43.8 37.5 32.4 45.1 39.0 33.8 45.3 40.1 35.4 46.3 42.6 38.8
SHC 22.5 27.4 31.5 24.1 30.2 33.7 24.7 31.9 35.4 26.5 35.9 38.8
kW 5.19 5.13 5.05 5.20 5.15 5.09 5.19 5.17 5.11 5.20 5.19 5.15
581B060 (5 TONS)
Temp (F)
Air Ent
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
1500/0.08 1750/0.09 2000/0.11 2500/0.13
Air Entering Evaporator — Ewb (F)
72 67 62 72 67 62 72 67 62 72 67 62
75
TC 70.8 65.4 58.5 72.5 67.3 61.1 73.0 68.4 62.8 74.8 70.3 64.8
SHC 34.1 42.7 49.9 35.7 45.5 54.2 36.8 48.0 57.8 39.6 53.0 63.4
kW 3.53 3.49 3.44 3.55 3.50 3.46 3.55 3.51 3.47 3.57 3.54 3.48
85
TC 68.9 63.2 55.3 70.5 65.1 57.9 72.2 66.4 60.2 73.2 68.1 62.9
SHC 33.5 41.8 48.4 35.0 44.8 52.8 37.0 47.6 56.8 39.3 52.5 62.4
kW 3.98 3.94 3.87 4.00 3.96 3.90 4.03 3.97 3.92 4.04 3.99 3.94
95
TC 66.8 60.6 52.4 68.3
62.5 54.3 69.3 63.8 56.6 71.2 65.6 60.6
SHC 32.8 40.7 47.0 34.5
43.8 51.1 36.0 46.7 55.0 39.1 51.8 60.5
kW 4.48 4.43 4.35 4.50
4.45 4.37 4.51 4.46 4.40 4.55 4.48 4.44
105
TC 64.3 57.7 49.9 65.9 59.8 51.7 66.9 61.1 54.1 68.4 62.8 58.4
SHC 32.0 39.6 45.8 33.7 42.8 49.7 35.3 45.7 53.5 38.4 51.0 58.4
kW 5.03 4.96 4.87 5.05 4.99 4.90 5.06 5.00 4.93 5.08 5.02 4.98
115
TC 61.5 54.8 47.3 62.8 56.7 49.1 64.0 58.2 51.6 65.4 59.9 56.1
SHC 31.0 38.4 44.5 32.5 41.6 48.2 34.4 44.6 51.6 37.4 50.0 56.1
kW 5.61 5.55 5.46 5.62 5.58 5.49 5.65 5.60 5.52 5.67 5.61 5.57
125
TC 58.7 51.6 44.5 59.9 53.4 46.2 60.8 54.9 49.0 62.2 56.8 53.5
SHC 30.0 37.2 43.1 31.7 40.4 46.2 33.3 43.4 48.9 36.4 48.9 53.4
kW 6.27 6.19 6.09 6.28 6.21 6.13 6.29 6.24 6.17 6.31 6.27 6.22
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
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
581B036-150