JOHNSON CONTROLS
73
SECTION 6 – TROUBLESHOOTING
FORM 160.81-NOM1
ISSUE DATE: 10/3/2020
6
The numbers in bold-face type in the center column
refer to the temperature, either in Centigrade or Fahr-
enheit, which is to be converted to the other scale. Con-
verting Fahrenheit to Centigrade the equivalent tem-
PRESSURE/TEMPERATURE CONVERSION TABLES
*In Hg. Vacuum
TEMPERATURE / PRESSURE CHART
134a SATURATION PROPERTIES (ENGLISH UNITS)
PRESSURE PSI
HFC - 134A SATURATION
TEMPERATURE
DEGREES F
15* -40
10* -30
5* -22
0 -15
5 -3
10 7
15 15
20 22
25 29
30 35
35 40
40 45
45 50
50 54
55 58
60 62
65 66
70 69
75 73
80 76
85 79
90 82
95 85
100 88
110 93
120 98
130 103
140 107
150 112
165 118
180 123
195 129
210 134
225 139
240 143
255 148
270 152
285 156
300 160
perature will be found in the left column. If converting
Centigrade to Fahrenheit, the equivalent temperature
will be found in the column on the right.
TEMPERATURE / PRESSURE CHART
134a SATURATION PROPERTIES (ENGLISH UNITS)
PRESSURE PSI
HFC - 134A SATURATION
TEMPERATURE
DEGREES F
25 -53
50 -40
75 -32
100 -26
125 -21
150 -17
175 -13
200 -10
225 -7
250 -4
275 -2
300 1
325 3
350 5
375 7
400 9
450 12
500 16
550 19
600 22
650 24
700 27
750 29
800 31
900 36
1000 39
1200 46
1400 52
1600 58
1800 63
2000 67
2200 72
2400 76
2600 79
2800 83
3000 86
3200 89
3400 93
3600 95