MRK-D-0034 V2.0
Aeroqual AQM 65 User Guide
Page | 78
Figure 4-34 Hose attached to the pressure gauge and to the cylinder of R134a
The objective is to pressurise the compressor to a predefined pressure. Your target pressure is
dependent upon the current temperature of the room or environment where you are performing this
exercise.
So you should know the current ambient temperature where you are and then read off the table what
your target pressure in PSI is.
Ambient
Temperature
Minimum Pressure
set-point
Target
Pressure set-point
Maximum Pressure
set-point
15
– 17.9 °C
6 psi
7 psi
8 psi
18
– 19.9 °C
8 psi
9 psi
10 psi
20
– 22.9 °C
10 psi
11 psi
12 psi
23
– 24.9 °C
12 psi
13 psi
14 psi
25
– 27.9 °C
13 psi
14 psi
15 psi
28
– 29.9 °C
15 psi
16 psi
17 psi
30
– 32.9 °C
16 psi
17 psi
18 psi
33
– 34.9 °C
17 psi
18 psi
19 psi
IMPORTANT!
The pressure variation is only a few PSI. It is important to try to achieve the target pressure point.
The risk of UNDER pressurising is that the AQM 65 will not be able to control the internal
temperature in hot outdoor conditions.
The risk of OVER pressurising is that during the cooling cycle the AQM will cool too rapidly
leading to an overshot of the target temperature which will result in unstable sensor readings.
YOU SHOULD NOT OVER FILL, it is important to reach the target pressure.