39
PERFORMANCE DATA (cont)
COOLING CAPACITIES (cont)
Standard Ratings
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
t
lwb
= Wet-bulb temperature corresponding to enthalpy of air leaving evapora-
tor coil (h
lwb
)
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.
Interpolation is permissible.
Correction Factor = 1.10 x (1 - BF) x (edb - 80).
558F121 (10 TONS)
Temp (F)
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
3000/0.095
4000/0.125
5000/0.15
Air Entering Evaporator — Ewb (F)
72
67
62
72
67
62
72
67
62
75
TC
136.6
125.5
112.7
143.2
131.4
120.5
147.4
135
124.4
SHC
67.2
83.1
98
73.6
93.9
113.4
80.2
105
123.8
kW
8.12
7.83
7.57
8.32
8
7.71
8.46
8.11
7.83
85
TC
130.8
120.3
104.6
136.8
125.7
115.2
140.8
128.7
119.5
SHC
64.7
81
94.4
71.5
92.2
110.8
78
102.4
119.4
kW
8.66
8.38
8.1
8.88
8.55
8.27
9.02
8.66
8.4
95
TC
124.8
114.4
97.3
130.3
119.6
107.5
133.6
122.7
114.8
SHC
62.6
78.9
90.5
69.5
90.3
106.5
75.3
100.7
114.7
kW
9.26
8.97
8.65
9.47
9.15
8.85
9.59
9.27
9.01
105
TC
118.8
105.2
88.4
123.4
112.5
99.1
126.7
115.8
108.6
SHC
60.8
75.3
85.7
67.3
88.2
99.1
73.5
98.9
108.6
kW
9.93
9.59
9.24
10.09
9.77
9.49
10.21
9.89
9.69
115
TC
115.7
98.6
84.7
120.7
104.4
93.9
123.3
110.4
103.4
SHC
59.7
72.8
83.9
66.8
85.3
93.9
73.2
97.5
103.4
kW
10.2
9.84
9.49
10.38
10.04
9.8
10.48
10.15
9.99
558F150 (12
1
/
2
TONS)
Temp (F
Air Entering
Condenser
(Edb)
Air Entering Evaporator — Cfm/BF
3750/0.08
4500/0.09
5000/0.10
6250/0.12
Air Entering Evaporator — Ewb (F)
72
67
62
72
67
62
72
67
62
72
67
62
75
TC
175.6
162.2
149.2
181.0
167.5
154.2
182.9
170.2
156.4
187.2
174.7
161.8
SHC
85.7
107.3
128.0
91.4
116.2
140.3
94.2
122.2
146.5
102.1
135.3
160.7
kW
11.16
10.85
10.57
11.32
11.00
10.69
11.37
11.07
10.73
11.49
11.19
10.87
85
TC
169.3
155.7
140.6
174.2
160.7
147.0
176.9
163.0
149.7
181.5
167.3
155.8
SHC
83.9
104.8
124.0
89.6
113.9
137.0
92.7
119.7
143.6
100.9
133.4
155.6
kW
12.15
11.78
11.42
12.31
11.94
11.58
12.39
12.01
11.63
12.53
12.14
11.82
95
TC
161.9
148.9
132.0
166.8
153.5
139.1
169.5
155.7
142.8
173.2
159.5
149.6
SHC
81.4
102.0
119.8
87.0
111.1
133.2
90.7
117.3
140.2
98.3
130.8
149.6
kW
13.12
12.72
12.28
13.30
12.89
12.46
13.40
12.97
12.56
13.54
13.11
12.78
105
TC
154.9
141.3
123.0
158.8
145.4
130.2
160.9
147.6
135.0
165.3
151.2
143.2
SHC
79.0
99.2
115.5
84.5
108.2
128.1
87.8
114.3
134.9
96.6
127.8 143.1
kW
14.16
13.66
13.17
14.31
13.82
13.35
14.38
13.91
13.48
14.58
14.07
13.77
115
TC
146.2
132.2
113.1
150.5
137.0
122.4
152.3
139.4
127.8
155.2
142.7
136.0
SHC
76.1
95.7
110.3
81.7
105.2
122.3
85.0
111.6
127.7
92.9
125.0
135.8
kW
15.09
14.57
14.07
15.30
14.76
14.25
15.37
14.87
14.43
15.49
15.02
14.73
BF
—
Bypass Factor
Edb
—
Entering Dry-Bulb
Ewb
—
Entering Wet-Bulb
kW
—
Compressor Motor Power Input
Ldb
—
Leaving Dry-Bulb
Lwb
—
Leaving Wet-Bulb
SHC
—
Sensible Heat Capacity (1000 Btuh) Gross
TC
—
Total Capacity (1000 Btuh) Gross
t
ldb
= t
edb
–
sensible capacity (Btuh)
1.10 x cfm
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
0TF
Q
0
0
4-
01
2
55
8F0
36-
1
5
0
Summary of Contents for 551A
Page 14: ...14 TYPICAL WIRING SCHEMATIC Single Fan Units Sizes 036 073 ...
Page 16: ...16 TYPICAL WIRING SCHEMATIC Sizes 155 300 ...
Page 29: ...29 BASE UNIT DIMENSIONS 558F036 072 0TFQ004 012 558F036 150 ...
Page 30: ...30 BASE UNIT DIMENSIONS 558F073 0TFQ004 012 558F036 150 ...
Page 31: ...31 BASE UNIT DIMENSIONS 558F090 102 120 150 0TFQ004 012 558F036 150 ...
Page 32: ...32 BASE UNIT DIMENSIONS 558F091 121 0TFQ004 012 558F036 150 ...
Page 74: ...74 BASE UNIT DIMENSIONS 551B036 072 0TFQ004 012 551B036 150 ...
Page 75: ...75 BASE UNIT DIMENSIONS 551B090 150 0TFQ004 012 551B036 150 ...
Page 133: ...133 BASE UNIT DIMENSIONS 558F180 210 0TFQ004 012 558F180 300 ...
Page 134: ...134 BASE UNIT DIMENSIONS 558F240 0TFQ004 012 558F180 300 ...
Page 135: ...135 BASE UNIT DIMENSIONS 558F300 0TFQ004 012 558F180 300 ...
Page 153: ...153 BASE UNIT DIMENSIONS 551A155 180 0TFQ004 012 551A155 180 ...
