Mitsubishi PUG18AYB Technical Manual page 22

036-21534-001 Rev. B (0703)
6 OPERATING PRESSURES / SUPERHEAT
Table 2: TEMPERATURE AND PRESSURE
SUCTION
PRESSURE
PSIG 1
0
(Service Port)
61.5 35
64.2 37
67.1 39
70.0 41
73.0 43
76.0 45
79.2 47
82.4 49
1. Saturation Temperature
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.
22
SUCTION SERVICE VALVE SUPERHEAT
2 4 6 8 10
37 39 41 43 45
39 41 43 45 47
41 43 45 47 49
43 45 47 49 51
45 47 49 51 53
47 49 51 53 55
49 51 53 55 57
51 53 55 57 59
12 14 16 18 20
47 49 51 53 55
49 51 53 55 57
51 53 55 57 59
53 55 57 59 61
55 57 59 61 63
57 59 61 63 65
59 61 63 65 67
61 63 65 67 69
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.
22 24 26 28 30
57 59 61 63 65
59 61 63 65 67
61 63 65 67 69
63 65 67 69 71
63 67 69 71 73
67 69 71 73 75
69 71 73 75 77
71 73 75 77 79
Mitsubishi Electronics 2003
32 34
67 69
69 71
71 73
73 75
75 77
77 79
79 81
81 83