83
PERFORMANCE DATA — 549B, 549C (cont)
COOLING CAPACITIES (cont)
549B072 (6 Tons)
Temp (F)
Outdoor
Entering Air
(Edb)
Indoor Entering Air — Cfm/BF
1800/0.06 2100/0.066 2400/0.071 3000/0.088
Indoor Entering Air — Ewb (F)
72 67 62 57 72 67 62 57 72 67 62 57 72 67 62 57
75
TC 83.2 77.6 71.6 67.9 84.7 79.8 73.6 71.5 85.9 81.0 75.0 74.3 88.4 82.9 78.4 78.3
SHC 39.7 50.4 60.6 66.6 41.6 54.3 65.9 70.1 43.4 57.6 70.6 72.8 47.2 63.9 76.9 76.8
kW 4.90 4.78 4.69 4.63 4.94 4.84 4.71 4.69 4.97 4.86 4.74 4.73 5.04 4.91 4.81 4.81
85
TC 81.5 75.5 69.0 64.8 83.2 77.3 71.1 69.4 84.5 78.5 72.7 72.2 86.2 80.8 76.5 76.5
SHC 39.2 49.8 59.6 63.6 41.4 53.5 65.0 68.0 43.3 56.9 69.7 70.8 47.1 64.1 75.0 75.0
kW 5.45 5.34 5.23 5.16 5.49 5.36 5.27 5.23 5.52 5.38 5.29 5.27 5.57 5.45 5.36 5.36
95
TC 78.8 72.5 64.1 61.8 80.9 74.5 67.0 66.1 82.0
76.0 69.9 69.9 83.7 78.1 74.2 74.1
SHC 38.4 48.6 57.4 60.6 40.8 52.6 63.2 64.8 42.8
56.4 68.3 68.5 46.8 63.7 72.7 72.7
kW 6.03 5.91 5.79 5.73 6.09 5.96 5.84 5.82 6.11
6.00 5.89 5.89 6.16 6.05 5.96 5.96
105
TC 76.2 69.5 58.6 57.8 77.9 71.3 63.4 63.1 79.3 72.7 67.2 67.2 81.1 74.5 71.3 71.2
SHC 37.6 47.4 55.0 56.6 39.9 51.4 61.4 61.9 42.2 55.3 65.9 65.9 46.5 62.5 69.9 69.9
kW 6.69 6.56 6.40 6.38 6.73 6.61 6.45 6.44 6.77 6.64 6.51 6.51 6.82 6.67 6.57 6.57
115
TC 72.5 65.1 54.8 54.7 74.3 67.8 58.6 58.6 75.6 69.1 63.2 63.2 77.3 70.9 68.4 68.4
SHC 36.3 45.8 53.2 53.6 38.7 50.2 57.4 57.5 41.1 54.0 62.0 62.0 45.5 61.3 67.1 67.1
kW 7.37 7.24 7.08 7.07 7.43 7.30 7.16 7.16 7.48 7.34 7.21 7.21 7.52 7.38 7.32 7.32
549B090 (7
1
/
2
Tons)
Temp (F)
Outdoor
Entering Air
(Edb)
Indoor Entering Air — Cfm/BF
2250/0.12 3000/0.15 3750/0.18
Indoor Entering Air — Ewb (F)
72 67 62 72 67 62 72 67 62
75
TC 97.6 92.5 84.3 100.8 95.6 89.9 101.6 97.8 91.7
SHC 47.7 61.0 72.7 51.5 67.3 83.8 55.0 74.4 89.7
kW 5.80 5.76 5.73 5.86 5.78 5.78 5.86 5.82 5.73
85
TC 97.2 89.9 79.8 100.0 94.1 86.7 102.4 96.0 89.9
SHC 48.1 60.2 70.5 51.7 68.1 82.4 55.8 74.1 89.3
kW 6.61 6.50 6.43 6.65 6.56 6.62 6.69 6.58 6.50
95
TC 94.4 86.9 75.0 98.2
91.3 81.8 99.6 93.7 87.3
SHC 47.3 59.2 68.1 51.7
67.5 79.8 55.0 74.8 87.3
kW 7.43 7.37 7.19 7.50 7.41 7.30 7.50 7.43 7.35
105
TC 91.7 82.2 70.7 94.8 87.3 76.6 97.0 90.1 83.4
SHC 46.3 57.4 65.9 50.9 66.3 76.4 54.8 74.1 83.4
kW 8.37 8.22 8.04 8.39 8.33 8.15 8.44 8.35 8.26
115
TC 87.7 77.4 66.9 91.7 81.6 72.5 93.9 85.3 78.8
SHC 44.9 55.4 64.0 50.3 64.2 72.5 55.0 72.5 78.6
kW 9.33 9.16 8.98 9.44 9.27 9.11 9.48 9.33 9.22
125
TC 83.6 73.3 66.7 87.1 76.0 69.1 89.5 79.0 74.4
SHC 43.6 53.9 63.8 48.7 62.0 69.1 53.7 70.1 74.4
kW 10.38 10.16 9.94 10.49 10.27 10.14 10.53 10.36 10.25
549B102 (8
1
/
2
Tons)
Temp (F)
Outdoor
Entering Air
(Edb)
Indoor Entering Air — Cfm/BF
2550/0.03 3400/0.04 4250/0.05
Indoor Entering Air — Ewb (F)
72 67 62 72 67 62 72 67 62
75
TC 116.4 105.6 94.8 118.9 110.4 99.4 120.4 112.9 104.3
SHC 55.7 69.2 82.0 58.6 79.7 95.8 61.6 89.2 104.2
kW 6.01 5.89 5.8 6.04 5.97 5.87 6.07 6.01 5.93
85
TC 117.6 102.1 91.1 121.0 106.7 95.6 117.5 109.3 101.3
SHC 58.4 67.9 80.4 64.1 78.6 93.9 61.0 88.4 101.2
kW 6.47 6.72 6.61 6.52 6.80 6.69 6.91 6.85 6.77
95
TC 113.7 98.0 86.1 117.4
102.3 91.3 113.4 104.7 97.9
SHC 57.4 66.5 78.2 63.5
77.2 91.1 59.9 87.2 97.8
kW 7.34 7.63 7.49 7.40
7.72 7.60 7.82 7.77 7.69
105
TC 109.8 93.0 78.7 113.2 97.3 85.9 108.9 99.9 93.7
SHC 56.2 64.6 75.0 62.4 75.5 85.9 58.7 85.5 93.6
kW 8.28 8.59 8.42 8.36 8.71 8.57 8.81 8.74 8.68
115
TC 100.2 86.4 72.7 104.5 90.0 80.8 106.0 93.2 88.0
SHC 50.4 62.1 71.9 57.2 73.0 80.8 63.4 83.2 88.0
kW 9.79 9.60 9.40 9.91 9.71 9.59 9.95 9.79 9.71
125
TC 94.0 76.6 63.1 98.8 80.1 68.1 101.0 84.4 75.1
SHC 48.3 58.5 63.1 55.4 69.2 68.1 61.9 79.8 75.1
kW 10.91 10.65 10.45 11.03 10.78 10.61 11.1 10.86 10.73
Standard Ratings
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not
extrapolate.
2. The following formulas may be used:
Where: h
ewb
= Enthalpy of air entering
evaporator coil
3. The SHC is based on 80 F edb temperature
of air entering evaporator coil.
Below 80 F edb, subtract (corr factor x cfm)
from SHC.
Above 80 F edb, add (corr factor x cfm) to
SHC.
Correction Factor = 1.10 x (1 – BF) x
(edb – 80).
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x
(edb – 80).
BF — Bypass Factor
Edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW — Compressor Motor Power Input
SHC — Sensible Heat Capacity (1000 Btuh)
Gross
TC — Total Capacity (1000 Btuh) Gross
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
BYPASS
FACTOR
(BF)
ENTERING AIR
DRY-BULB TEMP (F)
79 78 77 76 75
under
75
81 82 83 84 85
over
85
Correction Factor
.05 1.04 2.07 3.11 4.14 5.18
Use
formula
shown
below.
.10 .98 1.96 2.94 3.92 4.90
.20 .87 1.74 2.62 3.49 4.36
.30 .76 1.53 2.29 3.05 3.82
549B, 549C