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