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Table 14 – COOLING CAPACITIES 1--STAGE COOLING 3 TONS
580J04 (3 TONS) --- UNIT WITH PERFECT HUMIDITY SYSTEM IN SUBCOOLING MODE
A ir E n te ri n g E va p or a to r --- CF M
Temp (F) Air Ent
Condenser (Edb)
80 dry bulb 80 dry bulb 80 dry bulb
72 wet bulb 67 wet bulb 62 wet bulb
900 1200 1500 900 1200 1500 900 1200 1500
75
TC 40.6 43.2 45.3 37.0 39.4 41.3 33.4 35.6 37.4
SHC 21.6 23.9 25.6 25.6 27.7 29.3 29.6 31.6 33.1
kW 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
85
TC 37.0 39.6 41.7 33.6 36.0 37.9 30.2 32.3 34.1
SHC 17.7 20.2 22.2 22.7 25.0 26.9 27.7 29.9 31.6
kW 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3
95
TC 33.5 36.0 38.1 30.2 32.5 34.4 26.9 29.1 30.8
SHC 13.7 16.6 18.8 19.7 22.4 24.4 25.7 28.2 30.1
kW 2.6 2.6 2.6 2.5 2.5 2.5 2.5 2.5 2.5
105
TC 29.9 32.4 34.5 26.8 29.1 31.0 23.6 25.8 27.5
SHC 9.8 12.9 15.3 16.8 19.7 22.0 23.8 26.5 28.6
kW 2.9 2.9 2.9 2.8 2.8 2.8 2.8 2.8 2.8
115
TC 26.3 28.8 30.9 23.3 25.7 27.5 20.4 22.5 24.2
SHC 5.8 9.2 11.9 13.8 17.0 19.5 21.9 24.8 27.1
kW 3.2 3.2 3.2 3.1 3.1 3.1 3.1 3.1 3.1
580J04 (3 TONS) --- UNIT WITH PERFECT HUMIDITY SYSTEM IN HOT GAS REHEAT MODE
A ir E n te ri n g E va p or a to r --- CF M
Temp (F) Air Ent
Condenser (Edb)
75 dry bulb 75 dry bulb 75 dry bulb
62.5 wet bulb (50% relative) 64 wet bulb (55% relative) 65.3 wet bulb (60% relative)
1050 1200 1350 1050 1200 1350 1050 1200 1350
80
TC 14.7 15.5 16.2 15.9 16.7 17.4 16.9 17.7 18.4
SHC 6.7 7.6 8.5 4.8 5.7 6.6 3.2 4.1 5.0
kW 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
75
TC 15.1 15.8 16.4 16.2 17.0 17.6 17.2 18.0 18.6
SHC 7.5 8.4 9.2 5.8 6.7 7.5 4.4 5.2 6.0
kW 1.9 1.9 1.9 2.0 2.0 2.0 2.0 2.0 2.0
70
TC 15.5 16.1 16.7 16.6 17.3 17.9 17.5 18.2 18.8
SHC 8.4 9.3 10.0 6.9 7.7 8.5 5.5 6.4 7.1
kW 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9
60
TC 16.2 16.8 17.3 17.2 17.8 18.3 18.1 18.7 19.2
SHC 10.2 10.9 11.6 8.9 9.7 10.4 7.8 8.6 9.3
kW 1.8 1.8 1.8 1.8 1.8 1.8 1.9 1.9 1.9
50
TC 17.0 17.5 17.9 17.9 18.4 18.8 18.7 19.2 19.6
SHC 11.9 12.6 13.2 11.0 11.6 12.2 10.1 10.8 11.4
kW 1.7 1.7 1.7 1.8 1.8 1.8 1.8 1.8 1.8
40
TC 17.7 18.1 18.5 18.6 19.0 19.3 19.3 19.7 20.1
SHC 13.7 14.3 14.8 13.0 13.6 14.1 12.4 13.0 13.5
kW 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7
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