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INSTALLATION INSTRUCTIONS
REFRIGERANT CHARGE
Outdoor units are shipped with a refrigerant charge to
match a specific indoor coil and 15 feet of refrigerant line.
If shorter or longer refrigerant lines or a different indoor
coil are used, the charge will have to be adjusted.
For different line lengths, add or remove charge based on
0.6 ounces charge per foot of difference. For example, a
25 foot line set is 10 feet longer than the specified 15 feet.
Add 0.6 ounces charge for each of the extra 10 feet:
10 x 0.6 = 6.0 ounces additional charge
This outdoor unit is designed for use only with indoor coils
that utilize a hard shut−off TXV refrigerant metering de-
vice. With a hard shut−off indoor TXV, use the subcooling
method to make final charge adjustments:
1. Operate unit a minimum of 10 minutes before
checking charge.
NOTE: If outdoor unit has a 2−speed fan motor,
motor will operate in low speed when outdoor am-
bient temperature is below 82 °F. Pull one of the
yellow low voltage wires off the fan control and the
unit will default to high speed fan for servicing. Re-
connect wire after servicing.
Figure 12
Subcooling Temperature (°F)
Measured Liquid
Pressure (psig)
6
189
60
195
62
202
64
208
66
215
68
222
70
229
72
236
74
243
76
251
78
259
80
266
82
274
84
283
86
291
88
299
90
308
92
317
94
SEQUENCE OF OPERATION
With power supplied to indoor and outdoor units, trans-
former is energized.
On a call for cooling, the thermostat makes circuits R−Y
and R−G. Circuit R−Y energizes contactor, starting out-
door fan motor and compressor. Circuit R−G energizes
indoor unit blower relay, starting indoor blower motor.
10
R−410A Required Liquid Line Temperature (°F)
Rating Plate (required)
8
10
12
14
58
56
54
52
60
58
56
54
62
60
58
56
64
62
60
58
66
64
62
60
68
66
64
62
70
68
66
64
72
70
68
66
74
72
70
68
76
74
72
70
78
76
74
72
80
78
76
74
82
80
78
76
84
82
80
78
86
84
82
80
88
86
84
82
90
88
86
84
92
90
88
86
R−410A Split System Air Conditioner
2. Measure liquid service valve pressure by attaching
an accurate gauge to service port.
3. Measure liquid line temperature by attaching an
accurate thermistor type sensor or electronic ther-
mometer to liquid line near outdoor coil.
4. Refer to unit rating plate for required subcooling
temperature.
5. Refer to Figure 12. Find the required liquid line
temperature where the rating plate subcooling
temperature intersects measured liquid service
valve pressure.
6. If the measured liquid line temperature is higher
than the chart number, add refrigerant to lower the
measured temperature.
NOTE: When adding refrigerant, charge in liquid form,
using a flow restricting device, into the suction port.
If the measured liquid line temperature is lower than the
chart number, reclaim refrigerant to raise the measured
temperature.
Tolerance is | 3 °F.
Measured Liquid
16
Pressure (psig)
50
326
52
335
54
345
100
56
354
102
58
364
104
60
374
106
62
384
108
64
395
110
66
406
112
68
416
114
70
427
116
72
439
118
74
450
120
76
462
122
78
474
124
80
486
126
82
499
128
84
511
130
When thermostat is satisfied, its contacts open,
de−energizing contactor and blower relay. Compressor
and motors stop.
NOTE: If indoor unit is equipped with a time−delay relay
circuit, the blower runs an additional length of time to in-
crease system efficiency.
Rating Plate (required)
Subcooling Temperature (°F)
6
8
10
12
96
94
92
90
98
96
94
92
98
96
94
100
98
96
102
100
98
104
102
100
106
104
102
100
108
106
104
102
110
108
106
104
112
110
108
106
114
112
110
108
116
114
112
110
118
116
114
112
120
118
116
114
122
120
118
116
124
122
120
118
126
124
122
120
128
126
124
122
421 01 5100 01
14
16
88
86
90
88
92
90
94
92
96
94
98
96
98
100
102
104
106
108
110
112
114
116
118
120
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