22
Balance Point Worksheet
0
10
20
30
40
50
60
70
-20
-10
0
10
20
30
40
50
60
Outdoor Air Temp (Deg F)
Building Heat Loss, 1000BTUH
Unit Intetgrated Heating Capacity,
1000BTUH
060
048
042
036
030
024
Based on Entering Indoor Air of 70 Deg. F and Rated CFM
C03008
Fig. 24 -- 604D Balance Point Worksheet
75 (24)
82 (28)
85 (29)
95 (35)
105 (41)
Pressure
(psig)
5
10
15
20
25
Pressure
(kPa)
3
6
8
11
14
024
10.3 ( 5.7 )
9.8 ( 5.4 )
9.4 ( 5.2 )
9 ( 5 )
8.6 ( 4.7 )
189
61
56
51
46
41
1303
16
13
11
8
5
030
9.3 ( 5.2 )
8.8 ( 4.9 )
8.6 ( 4.8 )
7.8 ( 4.3 )
7 ( 3.9 )
196
63
58
53
48
43
1351
17
15
12
9
6
036
17.6 ( 9.8 )
16.8 ( 9.3 )
16.5 ( 9.2 )
15.4 ( 8.6 )
14.3 ( 7.9 )
203
66
61
56
51
46
1399
19
16
13
10
8
042
12.8 ( 7.1 )
12.7 ( 7.1 )
12.7 ( 7.1 )
12.6 ( 7 )
12.6 ( 7 )
210
68
63
58
53
48
1448
20
17
14
11
9
048
17.5 ( 9.7 )
16.9 ( 9.4 )
16.6 ( 9.2 )
15.7 ( 8.7 )
14.8 ( 8.2 )
217
70
65
60
55
50
1496
21
18
15
13
10
060
13.7 ( 7.6 )
13 ( 7.2 )
13 ( 7.2 )
14.5 ( 8.1 )
11.5 ( 6.4 )
224
72
67
62
57
52
1544
22
19
16
14
11
231
74
69
64
59
54
1593
23
20
18
15
12
238
76
71
66
61
56
1641
24
21
19
16
13
245
77
72
67
62
57
1689
25
22
20
17
14
252
79
74
69
64
59
1737
26
23
21
18
15
260
81
76
71
66
61
1792
27
25
22
19
16
268
83
78
73
68
63
1848
29
26
23
20
17
276
85
80
75
70
65
1903
30
27
24
21
19
284
87
82
77
72
67
1958
31
28
25
22
20
292
89
84
79
74
69
2013
32
29
26
23
21
300
91
86
81
76
71
2068
33
30
27
24
22
309
93
88
83
78
73
2130
34
31
28
26
23
318
95
90
85
80
75
2192
35
32
29
27
24
327
97
92
87
82
77
2254
36
33
31
28
25
336
99
94
89
84
79
2316
37
34
32
29
26
345
101
96
91
86
81
2378
38
35
33
30
27
354
103
98
93
88
83
2440
39
36
34
31
28
364
105
100
95
90
85
2509
40
38
35
32
29
374
107
102
97
92
87
2578
41
39
36
33
30
384
108
103
98
93
88
2647
42
40
37
34
31
394
110
105
100
95
90
2716
44
41
38
35
32
404
112
107
102
97
92
2785
45
42
39
36
33
414
114
109
104
99
94
2854
46
43
40
37
34
424
116
111
106
101
96
2923
47
44
41
38
35
434
118
113
108
103
98
2992
48
45
42
39
36
444
119
114
109
104
99
3061
48
46
43
40
37
454
121
116
111
106
101
3130
49
47
44
41
38
464
123
118
113
108
103
3199
50
48
45
42
39
474
124
119
114
109
104
3268
51
48
46
43
40
484
126
121
116
111
106
3337
52
49
47
44
41
494
127
122
117
112
107
3406
53
50
47
45
42
504
129
124
119
114
109
3475
54
51
48
46
43
514
131
126
121
116
111
3544
55
52
49
46
44
524
132
127
122
117
112
3612
56
53
50
47
45
534
134
129
124
119
114
3681
56
54
51
48
45
8- Add Charge if the measured temperature is higher than the table value.
5- Interpolate if the Outdoor ambient temperature lies in between the table
values. Extrapolate if the temperature lies beyond the table range.
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.
Required Subcooling oF (oC)
Model Size
Outdoor Ambient Temperature
Charging Procedure
Required Liquid Line Temperature for a Specific Subcooling (R-410A)
Required Subcooling (
o
C)
Required Subcooling (
o
F)
1- Measure Discharge line pressure by attaching a gauge to the service port.
50XZ500174
7- Read across from the Pressure reading to obtain the Liquid line
temperature for a required Subcooling
6- Find the Pressure Value in the table corresponding to the the measured
Pressure of the Compressor Discharge line.
C03008
Fig. 25 -- Cooling Charging Table--Subcooling
604D
