TM 9-2320-280-34
NOTE
refrigerant only.
Relative
Surrounding
Engine
Desirable Center
Low Side
High Side
Humidity
Air Temperature
Speed
Outlet Discharge
Pressure
Pressure
(percent)
F (C)
(rpm)
Air Temperature
psi (kPa)
psi (kPa)
F (C)
5 psi (34 kPa)
25 psi (172 kPa)
70
(21)
40
(
4)
11
( 76)
177
(1220)
20
80
(26)
1500
42
(
6)
17
(117)
208
(1434)
90
(32)
44
(
7)
22
(152)
226
(1558)
100
(37)
45
(
7)
25
(172)
255
(1758)
70
(21)
42
(
6)
13
( 89)
181
(1247)
30
80
(26)
1500
43
(
6)
18
(124)
208
(1544)
90
(32)
45
(
7)
24
(165)
234
(1613)
100
(37)
46
(
9)
28
(193)
267
(1840)
70
(21)
42
(
6)
14
( 96)
185
(1275)
40
80
(26)
1500
44
(
7)
20
(138)
220
(1517)
90
(32)
46
(
8)
26
(179)
243
(1675)
100
(37)
48
(
9)
30
(207)
278
(1917)
70
(21)
44
( 7)
14
( 96)
189
(1303)
50
80
(26)
1500
46
( 8)
22
(152)
226
(1558)
90
(32)
50
(10)
26
(179)
251
(1730)
100
(37)
52
(11)
30
(207)
289
(1992)
70
(21)
44
( 7)
16
(110)
193
(1331)
60
80
(26)
1500
50
(10)
24
(165)
233
(1606)
90
(32)
52
(11)
28
(193)
259
(1786)
100
(37)
54
(12)
32
(221)
300
(2068)
70
(21)
46
( 8)
18
(124)
198
(1365)
70
80
(26)
1500
50
(10)
24
(165)
238
(1641)
90
(32)
54
(12)
30
(207)
267
(1840)
100
(37)
58
(14)
32
(221)
312
(2151)
70
(21)
50 (10)
22 (152)
202 (1393)
80
80
(26)
1500
56 (13)
26 (179)
244 (1682)
90
(32)
60 (16)
32 (221)
277 (1910)
100
(37)
*
*
*
70
(21)
60 (16)
24 (165)
206 (1420)
90
80
(27)
1500
64 (18)
34 (234)
250 (1724)
90
(32)
70 (21)
44 (303)
284 (1958)
100
(38)
*
*
*
NOTE
* Information not available
R-134a refrigerant only.
AMBIENT TEMPERATURE
LOW SIDE PRESSURE RANGE**
HIGH SIDE PRESSURE RANGE**
F
C
PSI
kPa
PSI
kPa
70
21
10-25
69-172
130-190
896-1310
80
27
13-27
90-186
170-230
1172-1586
90
32
18-32
124-221
210-270
1448-1862
100
38
23-37
159-255
250-310
1724-2137
**Low and high side pressures are affected by relative humidity. Greater humidity will cause higher pressures.
Normal A/C test pressures at 1500 rpm.
Change 2
