Carrier 48DU Installation Instructions Manual page 26

Fig. 21 - - Non- -Communicating Emergency Cooling/Heating Wiring Connections
Required Subcooling
Outdoor Ambient Temperature
Model Size 75 (24) 82 (28) 85 (29)
024 15.5 ( 8.6 ) 15.6 ( 8.7 ) 15.7 ( 8.7 )
030
16.8 ( 9.3 ) 16.4 ( 9.1 ) 16.2 ( 9 )
036 14 ( 7.7 ) 13.9 ( 7.7 ) 13.9 ( 7.7 )
042 19.2 ( 10.7 ) 19.1 ( 10.6 ) 19.1 ( 10.6 ) 18.9 ( 10.5 ) 18.7 ( 10.4 )
048 21 ( 11.6 ) 20.8 ( 11.5 ) 20.7 ( 11.5 ) 20.4 ( 11.3 ) 20.2 ( 11.2 )
060
16.2 ( 9 ) 16.6 ( 9.2 ) 16.8 ( 9.3 )
Charging Procedure
1- Measure Discharge line pressure by attaching a gauge to the service port
2- Measure the Liquid line temperature by attaching a temperature sensing device to it
3- Insulate the temperature sensing device so that the Outdoor Ambient doesn't affect the reading
4- Refer to the required Subcooling in the table based on the model size and the Outdoor Ambient
temperature
5- Interpolate if the Outdoor temperature lies in between the table values. Extrapolate if the
temperature lies beyond the table range
6- Find the Pressure Value corresponding to the the measured Pressure on the Compressor
Discharge line
7- Read across from the Pressure reading to obtain the Liquid line temperature for a required
Subcooling
8- Add Charge if the measured temperature is higher than the liquid line temperature value in the
table
9- Add Charge using the service connection on the Suction line of the Compressor
Infinity Furnace
o o
F ( C)
Required Subcooling (
Pressure
95 (35) 105 (41) (psig)
15.8 ( 8.8 ) 15.9 ( 8.9 ) 174
15.6 ( 8.7 ) 15 ( 8.3 ) 181
13.8 ( 7.7 ) 13.7 ( 7.6 ) 188
195
202
17.3 ( 9.6 ) 17.8 ( 9.9 ) 209
216
223
189
196
203
210
217
224
231
238
245
252
260
268
276
284
292
300
309
318
327
336
345
354
364
374
384
394
404
414
424
434
444
454
464
474
484
494
504
514
524
534
Fig. 22 - - Cooling Charging Table- -Subcooling
26
Required Liquid Line Temperature for a Specific Subcooling (R-410A)
o
F) Required Subcooling (
Pressure
5 10 15 25 (kPa)
56 51 46 36 1200
59 54 49 39 1248
61 56 51 41 1296
63 58 53 43 1344
65 60 55 45 1393
67 62 57 47 1441
69 64 59 49 1489
71 66 61 51 1537
61 56 51 41 1303
63 58 53 43 1351
66 61 56 46 1399
68 63 58 48 1448
70 65 60 50 1496
72 67 62 52 1544
74 69 64 54 1593
76 71 66 56 1641
77 72 67 57 1689
79 74 69 59 1737
81 76 71 61 1792
83 78 73 63 1848
85 80 75 65 1903
87 82 77 67 1958
89 84 79 69 2013
91 86 81 71 2068
93 88 83 73 2130
95 90 85 75 2192
97 92 87 77 2254
99 94 89 79 2316
101 96 91 81 2378
103 98 93 83 2440
105 100 95 85 2509
107 102 97 87 2578
108 103 98 88 2647
110 105 100 90 2716
112 107 102 92 2785
114 109 104 94 2854
116 111 106 96 2923
118 113 108 98 2992
119 114 109 99 3061
121 116 111 101 3130
123 118 113 103 3199
124 119 114 104 3268
126 121 116 106 3337
127 122 117 107 3406
129 124 119 109 3475
131 126 121 111 3544
132 127 122 112 3612
134 129 124 114 3681
A06302
o
C)
3 6 8 14
13 11 8 2
15 12 9 4
16 13 10 5
17 14 12 6
18 16 13 7
20 17 14 9
21 18 15 10
22 19 16 11
16 13 11 5
17 15 12 6
19 16 13 8
20 17 14 9
21 18 15 10
22 19 16 11
23 20 18 12
24 21 19 13
25 22 20 14
26 23 21 15
27 25 22 16
29 26 23 17
30 27 24 19
31 28 25 20
32 29 26 21
33 30 27 22
34 31 28 23
35 32 29 24
36 33 31 25
37 34 32 26
38 35 33 27
39 36 34 28
40 38 35 29
41 39 36 30
42 40 37 31
44 41 38 32
45 42 39 33
46 43 40 34
47 44 41 35
48 45 42 36
48 46 43 37
49 47 44 38
50 48 45 39
51 48 46 40
52 49 47 41
53 50 47 42
54 51 48 43
55 52 49 44
56 53 50 45
56 54 51 45
A06315