MAHLE RTI RHS650 - Manual (Page 13)

Page 12
MAINTENANCE
For each 50 hours of operation - Replace filter drier:
Replace filter drier as follows:
1. Close valve 25.
2. Attach hose from low pressure side to service connector 28.
3. Attach hose from Compressor Outlet (High Side) Access Port 24 and an empty refrigerant
cylinder with a hand valve. Open hand valve.
4. Open inlet valve 1 on operating panel, set process selector on RECOVERY/RECYCLING and
main switch to on.
5. The white lamp RECOVERY lights up to indicate that refrigerant in the filter drier is being
recovered. Wait until the lamp goes out, close valve 1 and shut off main switch.
6. Filter drier 27 can now be removed by loosening the fittings.
7. Slide off the insulation and put it on the new filter drier.
8. Install the new filter drier.
9. Disconnect service hose, mounted between low pressure side and service connection 28.
10. Close valve on refrigerant cylinder. Disconnect service hose from Compressor Outlet (High Side)
Access Port 24.
11. Open valve 25. The RHS 650 is now ready to service A/C systems again.
12. Empty the refrigerant from the cylinder by connecting the low pressure service hose to the vapor
valve. Open valve 1 on the RHS650.
Set process selector to RECOVERY/RECYCLING and turn on the main switch. The cylinder is
empty when white RECOVERY/RECYCLING lamp turns off.
For each 50 hours of operation - Replace acid filter:
Replace acid filter as follows:
1. Set the process selector to RECOVER/RECYCLING and the main switch to on.
2. Wait for a short time, until the low pressure gauge shows 0 bar. Turn off power supply. DO NOT
wait until the white RECOVER/RECYCLING lamp goes out - otherwise the pressure will be built
up again in the compressor.
3. Replace the acid filter 26 by loosening both 3/8" nuts. When mounting the filter, make sure the
arrow points downwards.