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
