Oil drain & air purge – MAHLE RTI TC670RR User Manual
Page 5
Page 4
NON-CONDENSABLE PURGE CHART
(BARS)
0
C
R12
R22
R502
R134a
R410A
R407C
0
3.03
5.45
6.34
2.90
10.27
7.38
1
3.15
5.63
6.59
3.01
10.62
7.65
2
3.28
5.79
6.76
3.10
11.00
7.86
3
3.38
6.00
6.97
3.28
11.24
8.07
4
3.52
6.34
7.24
3.45
11.58
8.34
5
3.66
6.55
7.52
3.66
11.93
8.62
6
3.79
6.76
7.76
3.81
12.27
8.76
7
3.93
6.97
8.00
3.97
12.62
9.03
8
4.07
7.18
8.22
4.12
12.89
9.24
9
4.24
7.40
8.43
4.28
13.31
9.58
10
4.41
7.66
8.76
4.41
13.72
9.93
11
4.57
7.91
9.02
4.57
14.13
10.20
12
4.73
8.17
9.28
4.73
14.55
10.48
13
4.89
8.43
9.54
4.89
14.96
10.82
14
5.05
8.69
9.80
5.05
15.51
11.10
15
5.22
8.95
10.06
5.24
15.79
11.38
16
5.38
9.21
10.33
5.42
16.13
11.65
17
5.54
9.47
10.60
5.60
16.48
12.07
18
5.70
9.73
10.88
5.79
16.96
12.41
19
5.87
9.99
11.17
5.97
17.24
12.55
20
6.07
10.34
11.66
6.34
17.79
13.03
21
6.28
10.64
11.95
6.59
18.48
13.44
22
6.48
10.94
12.25
6.83
18.96
13.79
23
6.69
11.24
12.55
7.07
19.44
14.20
24
6.90
11.59
12.90
7.31
20.06
14.48
25
7.11
11.93
13.24
7.56
20.48
14.82
26
7.31
12.28
13.59
7.80
20.89
15.03
27
7.52
12.63
13.94
8.04
21.30
15.58
28
7.73
12.98
14.29
8.28
21.72
15.99
29
7.94
13.32
14.63
8.52
22.55
16.34
30
8.14
13.79
15.10
8.76
23.24
16.75
31
8.35
14.12
15.48
9.04
23.86
17.31
32
8.55
14.44
15.86
9.32
24.48
17.79
33
8.80
14.76
16.27
9.59
25.10
18.13
34
9.05
15.14
16.67
9.87
25.58
18.55
35
9.30
15.52
17.08
10.15
26.20
19.03
36
9.55
15.89
17.49
10.43
26.75
19.44
37
9.79
16.27
17.90
10.71
27.30
19.86
38 10.04
16.65
18.31
10.99
27.99
20.27
39 10.29
17.03
18.71
11.26
28.68
20.82
40 10.62
17.59
19.24
11.52
29.37
21.30
41 10.83
18.03
19.65
11.81
30.13
21.86
42 11.08
18.47
20.06
12.09
30.89
22.48
43 11.32
18.92
20.47
12.42
31.72
22.89
44 11.60
19.38
20.91
12.77
32.27
23.37
45 11.88
19.83
21.38
13.12
32.96
23.92
46 12.16
20.29
21.85
13.47
33.78
24.48
47 12.44
20.75
22.32
13.82
34.27
24.82
48 12.73
21.20
22.80
14.16
35.09
25.44
49 13.01
21.66
23.27
14.51
35.85
25.79
50 13.29
22.12
23.74
14.86
36.89
26.06
OIL DRAIN & AIR PURGE
Oil and Non-condensable Gas (Air)
are separated from the recovered
refrigerant and MUST be removed
following EACH recycling procedure
as follows:
1. SLOWLY open the Oil Drain Valve
(located on the side of the unit,
see page 7) to drain any oil which
may have been removed from the
A/C System. A plastic cup is
provided to collect the oil.
2. Close the Oil Drain Valve.
3. Determine the room temperature.
4. Locate the pressure (BARS)
corresponding to this room
temperature (
0
C) in the chart on
the top of the TC670RR. This
chart is reproduced at the right.
5. If the pressure indicated on the
gauge is greater than that
determined from the chart...
SLOWLY open the Gas (or Vapor)
valve on the top of the Recovery
Cylinder until the gauge pressure
equals that shown in the chart.
6. Close the Gas (or Vapor) valve.