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Table 26 – COOLING CAPACITIES 2--STAGE COOLING (RTPF ONLY) 8.5 TONS
580J09 COOLING CAPACITIES, UNIT WITH PERFECT HUMIDITY SYSTEM IN SUBCOOLING MODE
TEMP (F) AIR ENT
CONDENSER (Edb)
AIR ENTERING EVAPORATOR --- CFM
2550/0.04 3400/0.05 4250/0.07
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 119.20 107.44 96.41 126.95 114.98 103.92 131.87 119.81 109.54
SHC 50.63 63.94 77.40 59.17 76.72 94.21 66.80 88.44 108.22
kW 5.67 5.57 5.47 5.54 5.63 5.74 5.79 5.68 5.59
85
TC 110.40 99.22 88.76 117.63 106.26 95.77 122.21 110.77 101.07
SHC 42.39 56.16 70.07 50.42 68.45 86.38 57.71 79.86 99.95
kW 6.33 6.23 6.14 6.20 6.30 6.40 6.45 6.34 6.25
95
TC 101.37 90.79 80.86 108.07 97.31 87.39 112.29 101.47 92.38
SHC 33.97 48.22 62.56 41.46 60.01 78.39 48.40 71.09 91.47
kW 7.08 6.99 6.90 6.96 7.05 7.16 7.20 7.09 7.01
105
TC 92.04 82.06 72.71 98.19 88.05 78.72 102.07 91.86 83.40
SHC 25.31 40.06 54.88 32.24 51.33 70.17 38.85 62.06 82.67
kW 7.94 7.85 7.77 7.83 7.91 8.01 8.06 7.95 7.87
115
TC 82.37 73.01 64.24 87.95 78.45 69.73 91.46 81.90 74.09
SHC 16.38 31.65 46.95 22.71 42.37 61.69 28.94 52.74 73.52
kW 8.92 8.84 8.77 8.82 8.89 8.98 9.02 8.93 8.86
580J09 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
2550 3400 4250 2550 3400 4250 2550 3400 4250
80
TC 37.61 33.13 26.77 44.74 41.60 36.46 50.96 48.99 44.93
SHC ---0.52 ---0.63 ---0.73 ---0.46 ---0.57 ---0.67 ---0.42 ---0.53 ---0.62
kW 5.88 5.68 5.44 6.13 5.97 5.76 6.35 6.24 6.06
75
TC 38.71 34.24 27.86 45.84 42.73 37.59 52.05 50.11 46.06
SHC 0.45 0.34 0.25 0.50 0.40 0.31 0.54 0.44 0.36
kW 5.68 5.47 5.22 5.94 5.78 5.56 6.18 6.07 5.88
70
TC 39.70 35.25 28.83 46.80 43.70 38.59 52.97 51.04 47.02
SHC 1.41 1.32 1.23 1.47 1.37 1.29 1.50 1.41 1.34
kW 5.65 5.42 5.24 5.97 5.79 5.53 6.26 6.13 5.91
60
TC 41.77 37.33 30.76 48.86 45.80 40.71 55.00 53.10 49.12
SHC 3.34 3.26 3.18 3.40 3.32 3.25 3.43 3.36 3.29
kW 5.42 5.15 5.17 5.80 5.59 5.30 6.16 6.01 5.75
50
TC 43.83 39.27 32.61 50.92 47.89 42.70 57.04 55.16 51.22
SHC 5.27 5.21 5.14 5.32 5.27 5.21 5.36 5.31 5.25
kW 5.18 5.15 5.17 5.62 5.39 5.05 6.04 5.87 5.59
40
TC 45.75 41.13 34.50 53.08 50.00 44.64 59.24 57.40 53.44
SHC 7.20 7.15 6.95 7.26 7.21 7.16 7.29 7.25 7.21
kW 4.79 4.98 4.80 5.25 5.01 5.23 5.68 5.51 5.21
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