Refrigerant Charge - Payne PA3A Installation Instructions Manual

REFRIGERANT CHARGE

Outdoor units are shipped with a refrigerant charge to match a
specific indoor coil and 15 feet (4.6 m) 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 (7.6
m) line set is 10 feet (3 m) longer than the specified 15 feet (4.6 m).
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 device. With a
hard shut- -off indoor TXV, use the subcooling method to make
final charge adjustments:
MEASURED
LIQUID PRESSURE
(psig)
°F
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
326 96
335 98
345 100
354 102
364 104
374 106
384 108
395 110
406 112
416 114
427 116
439 118
450
120
462
122
474 124
486 126
499 128
511 130
Table 2—R- -410A Required Liquid Line Temperature (_F)
RATING PLATE (REQUIRED) SUBCOOLING TEMPERATURE _F (_C)
6 8
°C °F °C
16 58 14
17 60 16
18 62 17
19 64 18
20 66 19
21 68 20
22 70 21
23 72 22
24 74 23
26 76 24
27 78 26
28 80 27
29 82 28
30 84 29
31 86 30
32 88 31
33 90 32
34 92 33
36 94 34
37 96 36
38 98 37
39 100 38
40 102 39
41 104 40
42 106 41
43 108 42
44 110 43
46 112 44
47 114 46
48 116 47
49 118 48
50 120 49
51 122 50
52 124 51
53 126 52
54 128 53
1. Operate unit a minimum of 10 minutes before checking
charge.
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 thermometer to liquid
line near outdoor coil.
4. Refer to unit rating plate for required subcooling
temperature.
5. Refer to Table 2. 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/1.65˚C.
10 12
°F °C °F
56 13 54
58 14 56
60 16 58
62 17 60
64 18 62
66 19 64
68 20 66
70 21 68
72 22 70
74 23 72
76 24 74
78 26 76
80 27 78
82 28 80
84 29 82
86 30 84
88 31 86
90 32 88
92 33 90
94 34 92
96 36 94
98 37 96
100 38 98
102 39 100
104 40 102
106 41 104
108 42 106
110 43 108
112 44 110
114 46 112
116 47 114
118 48 116
120 49 118
122 50 120
124 51 122
126 52 124
6
14
°C °F °C °F
12 52 11 50
13 54 12 52
14 56 13 54
16 58 14 56
17 60 16 58
18 62 17 60
19 64 18 62
20 66 19 64
21 68 20 66
22 70 21 68
23 72 22 70
24 74 23 72
26 76 24 74
27 78 26 76
28 80 27 78
29 82 28 80
30 84 29 82
31 86 30 84
32 88 31 86
33 90 32 88
34 92 33 90
36 94 34 92
37 96 36 94
38 98 37 96
39 100 38 98
40 102 39 100
41 104 40 102
42 106 41 104
43 108 42 106
44 110 43 108
46 112 44 110
47 114 46 112
48 116 47 114
49 118 48 116
50 120 49 118
51 122 50 120
16
°C
10
11
12
13
14
16
17
18
19
20
21
22
23
24
26
27
28
29
30
31
32
33
34
36
37
38
39
40
41
42
43
44
46
47
48
49