Care; Descaling - Kärcher HDS 9/50 De Tr1 Service Manual

12

Care

The device must always be kept in a clean condition. Main-
tenance cleaning must be performed periodically by the
operator or service personnel considering the state of
cleanliness.
The exterior cleaning can be performed with a high-pres-
sure device, however, a minimum distance of 1-2 metres
between the trailer and the high-pressure lance must be
kept.

12.1 Descaling

ATTENTION
Lime deposits in the water system of the high-pressure
cleaning system lead to increased pipeline resistance and
possibly to the failure of calcified components.!
DANGER
Risk of explosion due to combustible gases! Smoking is
prohibited during descaling. Ensure proper ventilation.
DANGER
Risk of chemical burns on account of acid! Wear protective
glasses and protective gloves.
Observe the safety instructions for the detergent!
Descaling of the entire group heat exchanger, pump, booster heater
176
English 5.906-736.0 Rev. 00 (07/15)
ATTENTION
Risk of damage to equipment. When cleaning the motor
compartment, ensure that electrical components, plug
connections and the air filter are spared widely. Do not
flood the interior!
According to statutory requirements, only tested and ap-
proved boiler cleansing compounds with a certification
mark may be used for removal.
RM 101 (order no. 6.287-013) removes deposits.
–
These agents are geared to the materials used in the sys-
tem. It is recommended to flush the system with an alkaline
solution to neutralise the acid residues after descaling (pH-
value 7-8).
The application and accident prevention regulations must
be observed (concentration in compliance with the specifi-
cations on the container label
 Unpressurize the appliance.
 Open the supply tap of the water tanks and the drain
tap in order to completely drain the device. The filling
level indicator of the water tanks dips completely.
 Close the supply tap of the water tanks and the drain
tap.
 Mix the mixture for descaling:
Mix 18.75 litres of water with 1.25 litres of RM 101 (5-
litre can: 6.295-398.0).
 Open the filling hole of the float container. In order to do so,
loosen the wing screw and push the cover to the left.
 Fill up the float container with 20 litres of the descaling
mixture.
 Set the actuation lever of the ball tap to normal opera-
tion (horizontally).