GROSS COOLING CAPACITIES
UNIT 542F180
Indoor Air
Outdoor Air (F)
85
95
105
115
Cfm
BF
Ewb
(F)
Capacity
MBtuh
Compr
kW
Capacity
MBtuh
Compr
kW
Capacity
MBtuh
Compr
kW
Capacity
MBtuh
Compr
kW
Total
Sensible
Total
Sensible
Total
Sensible
Total
Sensible
5500
.07
62
176.1
169.7
13.9
167.2
165.4
14.9
158.0
157.9
16.0
148.4
148.4
17.7
67
191.4
142.6
14.6
182.7
139.9
15.6
171.4
130.1
16.6
159.0
130.8
17.7
72
207.1
111.2
15.3
199.8
109.4
16.4
189.3
106.0
17.6
176.9
102.0
18.6
6000
.08
62
180.0
176.8
14.0
171.4
161.9
14.9
162.5
162.5
16.1
152.7
152.7
17.3
67
194.3
148.9
14.6
185.4
146.7
15.6
173.9
143.0
16.6
161.5
137.4
17.7
72
209.7
115.2
15.2
202.3
113.3
16.4
191.6
110.2
17.5
179.0
106.3
18.6
7000
.09
62
186.3
184.6
13.8
178.3
178.3
14.8
169.1
169.1
16.0
158.9
158.9
17.2
67
198.4
158.6
14.3
189.4
156.6
15.4
178.0
153.1
16.4
165.4
147.5
17.5
72
213.3
121.3
15.0
205.9
119.7
16.2
195.2
117.0
17.3
182.6
113.2
18.4
LEGEND
BF
— Bypass Factor
Edb
— Entering Dry Bulb
Ewb — Entering Wet Bulb
kW
— Compressor Power Input
SHC — Sensible Capacity
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formula may be used:
sensible capacity (Btuh)
tldb = tedb −
1.10 x cfm
tlwb = Wet-Bulb temperature corresponding to enthalpy of air
leaving indoor coil (hlwb)
total capacity (Btuh)
hlwb = hewb −
4.5 x cfm
Where: hewb = Enthalpy of air entering indoor coil.
3. The SHC is based on 80 F edb temperature of air entering indoor
coil.
Below 80 F edb, subtract (correction factor x cfm) from SHC.
Above 80 F edb, add (correction factor x cfm) to SHC.
BF
ENTERING AIR DRY-BULB TEMP (F)
79
78
77
76
75
Under 75
Over 85
81
82
83
84
85
Correction Factor
.03
1.06
2.11
3.17
4.33
5.28
use formula
shown below
.10
.98
1.96
2.94
3.92
4.91
.15
.93
1.85
2.78
3.71
4.63
.20
.87
1.74
2.62
3.49
4.36
Interpolation is permissible. Do not extrapolate.
Correction Factor = 1.10 x (1 − BF) x (edb − 80).
INTEGRATED HEATING CAPACITIES
OUTDOOR-
AIR TEMP
(F db at
70% RH)
INTEGRATED
CAPACITY
(MBtuh)*
TOTAL POWER
INPUT (kW)
INTEGRATED
CAPACITY
(MBtuh)*
TOTAL POWER
INPUT (kW)
INTEGRATED
CAPACITY
(MBtuh)*
TOTAL POWER
INPUT (kW)
Indoor-Air Temp (F edb)
Indoor-Air Temp (F edb)
Indoor-Air Temp (F edb)
55
70
80
55
70
80
55
70
80
55
70
80
55
70
80
55
70
80
Indoor Airflow (cfm)
Indoor Airflow (cfm)
Indoor Airflow (cfm)
5500
6000
7000
60
218
208
198
18.5
19.6
20.2
221
210
200
18.5
19.5
20.1
230
219
208
19.6
19.6
20.2
50
189
180
171
16.9
17.8
18.3
192
183
174
17.0
17.9
18.4
201
191
181
17.2
18.1
18.6
40
163
155
147
15.5
16.3
16.8
165
157
149
15.8
16.6
17.1
174
166
158
16.1
16.9
17.4
30
121
115
109
14.5
15.3
15.8
122
116
110
14.7
15.5
16.0
129
123
117
15.0
15.8
16.3
20
105
100
95
13.7
14.4
14.8
107
102
97
14.1
14.8
15.2
114
109
104
14.4
15.2
15.7
10
89
85
81
12.7
13.4
13.8
91
87
83
13.3
14.0
14.4
99
94
89
13.8
14.5
14.9
0
69
66
63
11.5
12.1
12.5
70
67
64
11.7
12.3
12.7
80
76
72
12.0
12.6
13.0
−10
51
49
47
10.4
10.9
11.2
53
50
48
10.5
11.1
11.4
61
58
55
10.9
11.5
11.8
−20
44
42
40
9.2
9.7
10.0
46
44
42
9.4
9.9
10.2
54
51
48
9.9
10.4
10.7
LEGEND
ARI — Air Conditioning and Refrigeration Institute
Edb — Entering Dry Bulb
kW
— Total Unit Power Input — Includes compressors, outdoor-fan
motors, and indoor-fan motor. Indoor-fan motor heat based
on unit operating at cfm shown and external static pressures
(ESP) of 0.35.
Conversion formula: Btuh = kW x 3413
*Includes effect of defrost and indoor-fan motor heat at ARI conditions.
9
Summary of Contents for 542F
Page 14: ...TYPICAL FIELD WIRING 14 ...