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
