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Table 23 – COOLING CAPACITIES 2--STAGE COOLING (RTPF ONLY) 7.5 TONS
580J08 COOLING CAPACITIES, UNIT WITH PERFECT HUMIDITY SYSTEM IN SUBCOOLING MODE
TEMP (F) AIR ENT
CONDENSER (Edb)
AIR ENTERING EVAPORATOR --- CFM
2250/0.05 3000/0.07 3750/0.09
A ir E n te ri n g E va p or a to r --- Ew b ( F )
72 67 62 72 67 62 72 67 62
75
TC 103.05 93.02 83.60 109.77 99.52 90.08 114.01 103.69 95.19
SHC 43.66 55.34 67.09 50.99 66.29 81.31 57.49 76.27 92.20
kW 4.90 4.83 4.77 4.82 4.88 4.96 4.99 4.91 4.85
85
TC 95.39 85.83 76.88 101.59 91.89 82.95 105.53 95.76 87.77
SHC 36.42 48.47 60.60 43.24 58.99 74.40 49.44 68.68 84.90
kW 5.49 5.42 5.36 5.40 5.47 5.54 5.58 5.50 5.44
95
TC 87.48 78.44 69.97 93.21 84.05 75.61 96.84 87.63 80.14
SHC 28.98 41.46 53.97 35.32 51.53 67.34 41.21 60.92 77.41
kW 6.16 6.09 6.03 6.08 6.14 6.21 6.24 6.17 6.11
105
TC 79.35 70.83 62.84 84.57 75.96 68.04 87.88 79.23 72.26
SHC 21.34 34.26 47.18 27.17 43.86 60.08 32.73 52.95 69.70
kW 6.93 6.86 6.81 6.85 6.91 6.97 7.00 6.93 6.88
115
TC 70.87 62.89 55.42 75.58 67.54 60.15 78.56 70.51 64.06
SHC 13.40 26.79 40.14 18.70 35.89 52.54 23.94 44.68 61.67
kW 7.79 7.74 7.69 7.73 7.78 7.83 7.86 7.80 7.76
580J08 COOLING CAPACITIES, UNIT WITH PERFECT HUMIDITY SYSTEM IN H OT GAS REHEAT MODE
TEMP (F) AIR ENT
CONDENSER (Edb)
AIR ENTERING EVAPORATOR --- Ewb (F)
75 Dry Bulb
62.5 Wet Bulb
(50% Relative)
75 Dry Bulb
64 Wet Bulb
(56% Relative)
75 Dry Bulb
65.3 Wet Bulb
(60% Relative)
A ir E n te ri n g E va p or a to r --- Cf m
2250 3000 3750 2250 3000 3750 2250 3000 3750
80
TC 27.60 32.75 30.19 40.09 39.43 37.73 45.06 45.25 44.25
SHC ---3.12 5.20 6.71 3.75 5.24 6.75 3.77 5.26 6.78
kW 4.56 4.51 4.46 4.63 4.60 4.56 4.70 4.67 4.64
75
TC 35.40 33.78 31.20 41.14 40.51 38.80 46.15 46.37 45.38
SHC 4.67 6.17 7.69 4.71 6.21 7.73 4.74 6.24 7.76
kW 4.41 4.36 4.39 4.41 4.36 4.36 4.41 4.39 4.36
70
TC 36.36 34.71 32.18 42.10 41.47 39.77 47.08 47.31 46.32
SHC 5.63 7.14 8.66 5.67 7.18 8.71 5.70 7.21 8.74
kW 4.43 4.49 4.41 4.44 4.40 4.39 4.49 4.47 4.44
60
TC 38.25 36.64 34.15 43.97 43.37 41.72 48.98 49.22 48.26
SHC 7.56 9.09 10.62 7.60 9.13 10.66 7.62 9.15 10.69
kW 4.56 4.55 4.43 4.57 4.53 4.46 4.56 4.55 4.50
50
TC 40.15 38.60 36.14 45.95 45.37 43.73 50.57 50.97 49.56
SHC 9.48 11.03 12.58 9.52 11.07 12.62 9.54 11.10 12.64
kW 4.63 4.52 4.38 4.45 4.41 4.33 5.25 4.91 5.60
40
TC 42.18 40.62 38.11 47.80 47.25 45.43 52.65 52.75 51.83
SHC 11.41 12.98 14.54 11.45 13.02 14.58 11.47 13.04 14.60
kW 4.32 4.37 4.37 4.65 4.60 4.89 4.96 5.20 5.12
NOTE: Perfect Humidity only available on 2---stage RTPF models.
LEGEND
Edb --- Entering Dry --- Bulb
Ewb --- En tering Wet --- Bulb
kW --- Compressor Motor Power Input
Idb --- Leav ing Dry --- Bulb
Iwb --- Leaving Wet --- B ulb
SHC --- Sensible Heat Capacity (1000 Btuh) Gross
TC --- Total Capacity (1000 Btuh) Gross
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
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
Where: h
ewb
= Enthalpy of air entering evaporator coil
580J