Bosch RG8.0 Manual Original página 33

1. Disconnect the power supply to the A/C or refrigera-
tion system.
2. Connect the RG8.0 / RG4.0 to a mains power supply
that matches the voltage and frequency rating on the
RG8.0 / RG4.0.
3. Before making any hose connections, ensure that
system service valves, recovery unit control valves
and recovery tank valves are all in the closed posi-
tion. Also, make sure that the recovery / purge valve
is in the RECOVER position (pointed upwards).
Refer to Fig. 2.
4. Connect the RG8.0 / RG4.0 to the system being
serviced according to Fig. 4. Follow the order out-
lined below. Use only designated refrigerant hoses
that meet local regulations. Because hoses must be
switched in order to remove refrigerant from the
system, it is necessary to use hoses with manual
shutoff valves on both ends, and these instructions
are written for such hoses.
$
Ensure that air has been removed from the hoses
and the RG8.0 / RG4.0.
$
Connect a hose to the vapour port of an approved
two-valve recovery tank and the other end to the
inlet port of the RG8.0 / RG4.0.
$
Connect a hose to the liquid port of an approved
two-valve recovery tank and the other end to the
high side (liquid) service port of the A/C or re-
frigeration system. It is beneficial to have a sight
glass (Fig. 4, Pos. 8) in this hose to monitor liquid
refrigerant flow.
$
Connect another hose from the low side (vapour)
service port of the A/C or refrigeration system to
the outlet port of RG8.0 / RG4.0.
5. Open the high and low side service ports of the A/C
or refrigeration system and shut-off valves in the
hoses. Always open valves slowly to check hoses and
connections for leaks!
6. Open the recovery tank vapour valve, then open inlet
control valve of the RG8.0 / RG4.0 by rotating the
knob (blue) counter-clockwise towards VAPOUR
position.
7. Open the outlet control valve and the recovery tank
liquid valves of RG8.0 / RG4.0.
Bosch Automotive Service Solutions GmbH
Operation | RG8.0 / RG4.0 | 33
8. Start the RG8.0 / RG4.0.
 Liquid refrigerant should begin to flow into the
tank. This can be verified with the sight glass.
Refer to Fig. 4, Pos. 8.
9. Continue to run RG8.0 / RG4.0 until the liquid
refrigerant is removed from the system. Once the
liquid refrigerant has been transferred from the A/C
or refrigeration system to the recovery tank and
only vapour is being recovered, it is necessary to
switch to normal recovery connections and proce-
dure as outlined in chapter 6.1.2.
10. Close the inlet valve of the RG8.0 / RG4.0 and the
refrigerant tank liquid valve. The RG8.0 / RG4.0
should shut-off due to the low-pressure cut-off
switch.
11. Power off the RG8.0 / RG4.0 and close all remain-
ing valves – outlet valve of the RG8.0 / RG4.0, sys-
tem service valves and recovery tank vapour valve.
12. Close all hose shut-off valves and proceed to
reconnect and follow the procedure as outlined in
chapter 6.1.2.
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F 002 DG9 H00 2018-08-17