Purging air from the erc cylinder, Page 8 – MAHLE RTI TX200-UNDP User Manual
Page 9
Page 8
NON-CONDENSABLE PURGE CHART
(BARS)
0
C
R12
R22
R502
R134a
0
3.03
5.45
6.34
2.90
1
3.15
5.63
6.59
3.01
2
3.28
5.79
6.76
3.10
3
3.38
6.00
6.97
3.28
4
3.52
6.34
7.24
3.45
5
3.66
6.55
7.52
3.66
6
3.79
6.76
7.76
3.81
7
3.93
6.97
8.00
3.97
8
4.07
7.18
8.22
4.12
9
4.24
7.40
8.43
4.28
10
4.41
7.66
8.76
4.41
11
4.57
7.91
9.02
4.57
12
4.73
8.17
9.28
4.73
13
4.89
8.43
9.54
4.89
14
5.05
8.69
9.80
5.05
15
5.22
8.95
10.06
5.24
16
5.38
9.21
10.33
5.42
17
5.54
9.47
10.60
5.60
18
5.70
9.73
10.88
5.79
19
5.87
9.99
11.17
5.97
20
6.07
10.34
11.66
6.34
21
6.28
10.64
11.95
6.59
22
6.48
10.94
12.25
6.83
23
6.69
11.24
12.55
7.07
24
6.90
11.59
12.90
7.31
25
7.11
11.93
13.24
7.56
26
7.31
12.28
13.59
7.80
27
7.52
12.63
13.94
8.04
28
7.73
12.98
14.29
8.28
29
7.94
13.32
14.63
8.52
30
8.14
13.79
15.10
8.76
31
8.35
14.12
15.48
9.04
32
8.55
14.44
15.86
9.32
33
8.80
14.76
16.27
9.59
34
9.05
15.14
16.67
9.87
35
9.30
15.52
17.08
10.15
36
9.55
15.89
17.49
10.43
37
9.79
16.27
17.90
10.71
38
10.04
16.65
18.31
10.99
39
10.29
17.03
18.71
11.26
40
10.62
17.59
19.24
11.52
41
10.83
18.03
19.65
11.81
42
11.08
18.47
20.06
12.09
43
11.32
18.92
20.47
12.42
44
11.60
19.38
20.91
12.77
45
11.88
19.83
21.38
13.12
46
12.16
20.29
21.85
13.47
47
12.44
20.75
22.32
13.82
48
12.73
21.20
22.80
14.16
49
13.01
21.66
23.27
14.51
50
13.29
22.12
23.74
14.86
PURGING AIR FROM THE ERC CYLINDER
Refrigerant recovered into the ERC Cylinder may also contain Air.
This Air will increase the pressure in the ERC Cylinder and slow
recovery. Large quantities of Air may even cause the TX200 to stop
recovering due to a High-Pressure-Shutdown.
Check the pressure in the ERC Cylinder to determine the need to
purge Air as follows:
Connect the High Side Gauge (on Gauge Manifold) to the Vapor
Valve of the ERC Cylinder. Determine the ambient temperature and
compare the gauge pressure to the pressure shown in the Air Purge
Chart to the right.
If the ERC Cylinder pressure is greater, slowly open the Gauge
Manifold Valve and allow Air to slowly escape until the pressure
equals that shown in the chart.
The above purge process can be performed anytime during a
recovery and while the ERC Cylinder is still above ambient
temperature after a recovery procedure.
After the ERC Cylinder has cooled to ambient temperature, the Air
can be purged to the pressure in a Standard Refrigerant
Pressure/Temperature Chart.
NOTE:
A High-Pressure-Shutdown can be detected by noting that the
Compressor-On Light goes OFF and there is still positive pressure
at the Inlet of the TX200.
The Condenser Fan will continue to run and the TX200 Compressor
may cycle Off and On as the Outlet Pressure rises and falls.