25
LEGEND NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
COOLING CAPACITIES (1-STAGE COOLING) 4 TONS (cont)
582J*05G (4 TONS) - UNIT WITH PERFECT HUMIDITY SYSTEM IN SUBCOOLING MODE
TEMP (F) AIR ENT
CONDENSER (Edb)
AIR ENTERING EVAPORATOR - SCFM
1200 1600 2000
Air Entering Evaporator - Ewb (F)
72 67 62 72 67 62 72 67 62
75
TC 35.4 37.1 41.2 40.7 43.2 41.0 44.3 42.2 35.7
SHC 16.4 21.6 31.5 31.3 24.3 16.9 16.0 22.4 26.9
kW 3.06 3.07 3.06 3.44 3.43 3.41 3.84 3.82 3.72
85
TC 43.4 36.8 29.6 22.8 30.1 37.9 31.0 23.1 15.6
SHC 13.0 17.6 21.5 15.5 11.7 7.8 2.0 5.7 9.2
kW 4.28 4.20 4.05 4.77 4.57 4.42 5.17 4.99 4.81
95
TC 34.5 34.9 35.6 42.8 40.4 37.8 42.4 43.8 39.3
SHC 16.3 20.9 27.7 36.7 23.8 16.2 16.4 26.1 34.3
kW 3.25 3.25 3.24 3.63 3.63 3.61 4.04 4.02 4.00
105
TC 44.0 40.3 33.3 26.2 33.7 41.0 34.2 26.1 18.6
SHC 15.1 22.9 28.9 22.6 17.2 11.1 5.0 10.6 15.8
kW 4.49 4.47 4.32 4.99 4.87 4.69 5.50 5.28 5.09
115
TC 33.2 33.5 38.3 39.8 37.3 35.4 40.3 42.0 41.3
SHC 15.6 20.3 31.2 34.7 22.3 15.3 15.9 26.2 39.6
kW 3.53 3.51 3.46 3.89 3.89 3.88 4.31 4.30 4.26
Edb — Entering dry-bulb
Ewb — Entering wet-bulb
kW — Compressor motor power input
Ldb — Leaving dry-bulb
Lwb — Leaving wet-bulb
SHC — Sensible capacity (1000 Btuh) gross
TC — Total capacity (1000 Btuh) gross
t
ldb
= Wet-bulb temperature corresponding to enthalpy of air leaving evapora-
tor coil (h
lwb
)
Where h
ewb
= Enthalpy of air entering evaporator coil
t
ldb
=t
edb
– sensible capacity (Btuh)
1.10 x cfm
h
lwb
=h
ewb
– total capacity (Btuh)
4.5 x cfm
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