Still RX70-16, Original Instructions Manual, Page: 334 / 380

5
Maintenance
Remaining ready for operation
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1
– Slowly open the filler cap (1) and release
over pressure.
– Remove the filler cap.
WARNING
Cooling fluids and coolants are hazardous to your
health.
– Observe the safety regulations for handling the
cooling fluid; see the section entitled "Cooling
fluid".
– Check the concentration of the coolant.
Concentration of the coolant
CAUTION
Risk of corrosion!
The percentage of coolant must always be at
least 40%, even if frost protection is not needed
in warmer climates.
If greater frost protection is required for climatic rea-
sons, the percentage of coolant can be increased
to up to 60%.
The percentage of coolant must not exceed 60%,
otherwise the frost protection is reduced. In addi-
tion, the cooling effect is also reduced.
Only use clean, softened water for the water per-
centage.
Frost protection
up to °C
Water percentage
%
Coolant percentage
%
-25 60 40
-30 55 45
-35 50 50
-40 40 60
For details of the filling quantity in the cooling
system, see the section entitled "Maintenance
data table".
CAUTION
Coolant with a different specification must not be
mixed in!
– When topping up, use the coolant listed in the
maintenance data table.
Only use coolant additive according to the manu-
facturer's guidelines.
322 174749 EN - 03/2017