MAHLE RTI RHS700 - Manual (Page 15)

- 8.2 -
Charging
C:\RHS Computer Files\Instructions\RHS\GB\645-40\0009A-01.doc 1997.03.26
RHS 700
4. Open the high-pressure valve on the red hose (on R12 systems simply close the
hose) and observe the charging quantity on the charging quantity indicator.
When the black pointer has reached the red pointer, the charging process must
be stopped with the process switch.
5. It is now possible to check the function of the A/C unit by closing valves 1 and
2 and opening both hose valves.
6. After completion of the A/C unit test process, close the red high-pressure hose
valve and open valves and while the A/C unit is in operation. This
empties refrigerant from the high-pressure hose and ensures the accuracy of the
refrigerant quantity charged. Now close the service valve on the blue hose. (On
R12 systems simply remove the hose.)
7. After charging, hoses will contain a small quantity of refrigerant. To recover
this refrigerant, first close hose valves and then switch over to RECOVERY
for a short time.
8. Connect the service hose between refrigerant cylinder and high-pressure stub
(red) to empty/recharge the internal cylinder. Emptying must be as described in
point 4 and recharging as described in the RECOVERY process. Open valve
and the valve on the refrigerant cylinder. The refrigerant cylinder must only be
filled to not more than 80% of its maximum volume. After emptying/re-
charging of the required refrigerant quantity, close the valves again. Open
valves and (low-pressure stub closed) and switch on the process
switch for RECOVERY/RECYCLING to empty the hose.
Note:
It is often a problem to charge the whole charging quantity from the high-pressure
side only. If this is the case, a two-sided charge is possible by opening valve .