MAHLE RTI RHS700 User Manual

A’GRAMKOW A/S

Augustenborg Landevej 19
DK-6400 Sønderborg
Denmark

A/S Reg. No. 17 12 31
Telephone: [phone]
Telefax: 45 74 43 36 46
Telex: 5 23 18
Bank: Den Danske Bank, No. 32 27

INSTRUCTIONS RHS 700

Recovery, Recycling, Evacuation

and Charging Station

RHS 700

C:\RHS Computer Files\Instructions\RHS\GB\645-40\0009A-01.doc 1997.03.26
RHS 700

Contents RHS 700

1. Application

2. Safety precautions

3. Components

4. Before use

5. Test

6. Recovery/recycling

7. Evacuation

8. Charging

9. Maintenance

10. Trouble shooting

11. Service set

12. Accessories/spare parts

13. Specifications

14. Pos. no. location

15. Appendix

- 0.1 -

C:\RHS Computer Files\Instructions\RHS\GB\645-40\0009A-01.doc 1997.03.26
RHS 700

- 1.1 -

Application

Your new RHS 700 station represents the latest in equipment for servicing air­conditioning units (A/C units). The station is designed for refrigerants R12 and
R134a. It can, and must, only be used for one of these refrigerants.

RHS 700 is a test, recovery/recycling-(draining/cleaning), evacuation, oil/ref­rigerant charging station and is thus able to perform a total process cycle in
servicing A/C units for the automobile industry.

The recycling process is designed to follow SAE-standards J1989 and J2099 on
recycled refrigerant for A/C units.

Process operations - from test to charging - are performed by operating four
different process switches and two shut-off valves. This reduces the risk of error
operation to a minimum.

Constant monitoring ensures that the automatic process sequence does occur
correctly. Safety devices are built into the station to stop operation and indicate
faults in processes, e.g. excessively high pressure, overcharging of charging
cylinder.

During the recycling process a small quantity of oil is drained from the A/C unit.
On completion of the recovery process this quantity can be drained into a
measuring beaker. The same quantity of new oil must be filled into the A/C unit.
Refer to the A/C unit instructions and use only the type of oil specified.

The filter driers have a very high capacity (200 kg) and are easy to replace during
servicing.

A system built into the station ensures that non-condensable gases are automa­tically blown off and that the discharge of refrigerant to the atmosphere is kept to
a minimum.

Before using RHS 700, read these instructions carefully to ensure that the pro­cesses are performed correctly.

C:\RHS Computer Files\Instructions\RHS\GB\645-40\0009A-01.doc 1997.03.26
RHS 700

- 1.2 -

Application

We reserve the right to make constructional and design changes and accept no
responsibility for printing errors.

RHS 700 complies with European standards on “Safety and health” and is GS­tested.

See appendixes, "Declaration of Conformity" and TÜV test report.

C:\RHS Computer Files\Instructions\RHS\GB\645-40\0009A-01.doc 1997.03.26
RHS 700

- 2.1 -

Safety precautions

1. Always wear protective goggles and gloves when working with
refrigerant.

2. Do not allow refrigerant to come into contact with the skin or eyes.

3. Before disconnecting RHS 700 from the A/C unit, make sure that the
process is completed so that refrigerant does not escape to the atmos­phere.

4. RHS 700 is for use only in dry indoor surroundings.

5. Disconnect the electrical supply before performing maintenance on RHS

700.

6. To reduce the risk of fire, avoid using an extension cord. If, however, an
extension cord is necessary, it must have a minimum cross-sectional area
of 2.5 mm2.

7. In the event of fire, remove any external refrigerant cylinders.

8. When oil which accompanies the refrigerant drained from the A/C unit is
tapped from the suction accumulator into the measuring beaker supplied,
ensure that it is handled according to existing national legislation. A
suitable container can be obtained from the refrigerant supplier.

9. Always brake the two front wheels of the station when parking.

10. Most national legislation forbids the station being used for the charging
of cylinders which are intended for transference to a third party.

C:\RHS Computer Files\Instructions\RHS\GB\645-40\0009A-01.doc 1997.03.26
RHS 700

- 3.1 -

Components

1. Main switch

2. Operation time indicator

3. Low-pressure valve

4. Pressure gauge - low pressure

5. High-pressure valve

6. Pressure gauge - high pressure

7. Charging switch

8. Charging quantity indicator

9. Evacuation switch

10. Cylinder full - lamp

11. Vacuum check

12. Recovery/recycling switch

13. Vacuum gauge

C:\RHS Computer Files\Instructions\RHS\GB\645-40\0009A-01.doc 1997.03.26
RHS 700

- 3.2 -

Components

14. High-pressure side

15. Oil beaker - 250 ml

16. High-pressure hose - red

17. Oil charging

18. Sightglass

19. Low-pressure side

20. Low-pressure hose - blue

21. Service coupling - high pressure

22. Service coupling - low pressure

23. Oil drain valve

C:\RHS Computer Files\Instructions\RHS\GB\645-40\0009A-01.doc 1997.03.26
RHS 700

- 4.1 -

Before use

Check the following:

- whether the station has been damaged in transit - if so, contact supplier

immediately;

- oil level in vacuum pump: it must not be below the centre of the sight glass.

If the level is too low, see section MAINTENANCE for vacuum oil
replenishment instructions;

- whether the mains supply is as stated on the station nameplate;

- whether the refrigerant in the A/C unit is as stated on the station nameplate.

Preparation:

- Connect mains plug to mains supply.

- Connect the red and blue hoses to their stubs on the rear of the station. Blue

hose to low-pressure side, red hose to high-pressure side. (See the next two
pages.)

- Make sure that the shut-off valves on hoses and pos. 5 are closed.

- Connect high and low-pressure hoses to their respective sides (using the

service couplings) on the A/C unit. (See the next two pages.)

- RHS 700 is now ready for operation.

C:\RHS Computer Files\Instructions\RHS\GB\645-40\0009A-01.doc 1997.03.26
RHS 700

- 4.2 -

Before use

Connection of service couplings

C:\RHS Computer Files\Instructions\RHS\GB\645-40\0009A-01.doc 1997.03.26
RHS 700

- 4.3 -

Before use

C:\RHS Computer Files\Instructions\RHS\GB\645-40\0009A-01.doc 1997.03.26
RHS 700

- 5.1 -

Test

The test function must be performed to check the station.

1. Close both valves on the control panel (pos. 1-2).

2. Connect the high and low-pressure hoses to the A/C unit and open the service

couplings.

3. Switch on the A/C unit and read the pressures on the high and low-pressure

gauges (pos. 3/4). The correct pressures are given in the A/C unit manual.

4. Perform a condition diagnosis in accordance with the supplier’s instructions.

See appendix “Example of trouble shooting in an A/C unit”.

C:\RHS Computer Files\Instructions\RHS\GB\645-40\0009A-01.doc 1997.03.26
RHS 700