TECHNICAL SUPPORT MANUAL
Split System Air Conditioner: (C,H,T)XA6
6
421 04 6300 01
R--410A CHARGING CHART
Measured Liquid
Pressure (psig)
Rating Plate (required) Subcooling Temperature
°
F (
°
C)
°
F
(
°
C)
°
F
(
°
C)
°
F
(
°
C)
°
F
(°
C)
F
(°
C)
F
(
°
C)
6
3
8
4
10
6
12
7
14
8
16
9
R--410A Required Liquid Line Temperature
°
F (
°
C)
251
78
26
76
24
74
23
72
22
70
21
68
20
259
80
27
78
26
76
24
74
23
72
22
70
21
266
82
28
80
27
78
26
76
24
74
23
72
22
274
84
29
82
28
80
27
78
26
76
24
74
23
283
86
30
84
29
82
28
80
27
78
26
76
24
291
88
31
86
30
84
29
82
28
80
27
78
26
299
90
32
88
31
86
30
84
29
82
28
80
27
308
92
33
90
32
88
31
86
30
84
29
82
28
317
94
34
92
33
90
32
88
31
86
30
84
29
326
96
36
94
34
92
33
90
32
88
31
86
30
335
98
37
96
36
94
34
92
33
90
32
88
31
345
100
38
98
37
96
36
94
34
92
33
90
32
364
104
40
102
39
100
38
98
37
96
36
94
34
374
106
41
104
40
102
39
100
38
98
37
96
36
384
108
42
106
41
104
40
102
39
100
38
98
37
395
110
43
108
42
106
41
104
40
102
39
100
38
406
112
44
110
43
108
42
106
41
104
40
102
39
416
114
46
112
44
110
43
108
42
106
41
104
40
427
116
47
114
46
112
44
110
43
108
42
106
41
439
118
48
116
47
114
46
112
44
110
43
108
42
450
120
49
118
48
116
47
114
46
112
44
110
43
462
122
50
120
49
118
48
116
47
114
46
112
44
474
124
51
122
50
120
49
118
48
116
47
114
46
CAUTION
1. Compressor damage may occur if system is over charged.
2. This unit is factory charged with R--410A in accordance with the amount shown on the rating plate. The charge is
adequate for most systems using matched coils and tubing not over 15 feet long. Check refrigerant charge for maximum
efficiency. See Product Data Literature for Required indoor air Flow Rates and for use of line lengths over 15 feet.
3. Relieve pressure and recover all refrigerant before system repair or final disposal. Use all service ports and open all
flow--control devices, including solenoid valves.
4. Never vent refrigerant to atmosphere. Use approved recovery equipment.
COOLING ONLY CHARGING PROCEDURE
1. Only use sub cooling charging method when OD ambient is grater than 70ºF and less than 100ºF, indoor temp is
greater than 70ºF and less than 80ºF, and line set is less than 80 ft.
2. Operate unit a minimum of 15 minutes before checking the charge.
3. Measure liquid service valve pressure by attaching an accurate gauge to the service port.
4. Measure the liquid line temperature by attaching an accurate thermistor type or electric thermometer to the
liquid line near the outdoor coil.
5. Refer to unit rating plate for required sub--cooling temperature.
6. Find the point where the required sub--cooling temperature intersect the measured liquid service valve pressure.
7. To obtain the required sub--cooling temperature at specific liquid line pressure, add refrigerant if liquid line
Temperature is higher than indicated. When adding refrigerant, change in liquid form using a flow restricting
Device into suction service port. Recover refrigerant if temperature is lower. Allow a tolerance of +/--3ºF.
