036-21534-001 Rev. B (0703)
22
Mitsubishi Electronics 2003
3.
Measure and record the suction pressure at the suction
service valve port.
4.
Using Table 1, note the superheat value corresponding
to the intersection of the indoor wet bulb and the outdoor
dry bulb.
5.
With the superheat value obtained in step 4 and the suc-
tion pressure value from step 3, find the intersection of
the values in Table 2. This is the required suction tube
temperature at the suction service valve.
6.
To bring the tube temperature in line with the required
value from Table 2, add refrigerant to the service port to
cause the tube temperature to fall and reclaim refrigerant
to cause the temperature to rise.
Table 2:
TEMPERATURE AND PRESSURE
SUCTION
PRESSURE
PSIG
(Service Port)
SUCTION SERVICE VALVE SUPERHEAT
0
1
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
61.5
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
64.2
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
67.1
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
70.0
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
73.0
43
45
47
49
51
53
55
57
59
61
63
63
67
69
71
73
75
77
76.0
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
79.2
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
82.4
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
1. Saturation Temperature
OPERATING PRESSURES / SUPERHEAT
6
