Kärcher HDS 13/20 De Tr1 Operating Manual page 29

Frost protection
To protect from freeze damages, the appli-
ance must be flushed with antifreeze.
Note:Use normal glycol-based anti-freez-
ing agents for automobiles.
Note: Observe handling instructions of the
anti-freeze agent manufacturer.
A certain corrosion protection is achieved
with this as well.
Antifreeze motor
 Check the coolant circuit of the motor
for sufficient antifreeze, refill antifreeze
as needed.
 See Maintenance Procedures "Check
and refill the coolant".
Frost protection battery
 If the appliance is not used for an ex-
tended period and if there is frost, re-
move the battery and store it in a loca-
tion protected from frost.
Antifreeze rinse in the circuit (high
pressure pump)
 With external water supply: Disconnect
the water hose from the water supply.
 Set the power switch to "0/OFF" (burner
off).
 Unpressurize the appliance.
 Set the power switch to the operating
mode "frost protection".
 HDS 13/20, HDS 17/20 only:
Set the detergent dosing valve to maxi-
mum. Pull the detergent suction hose
out of the detergent container and store
it in such a way that it can be evacuat-
ed.
 Open the supply tap of the water tanks
and the drain tap in order to completely
drain the device. The filling level indica-
tor of the water tanks dips completely.
 Close the supply tap of the water tanks
and the drain tap.
 Disconnect the trigger gun from the
high-pressure hose.
 Connect the high-pressure hose to the
frost protection inlet.
 Connect the water hose to the return
flow of the frost protection.
 Prepare the antifreeze in the antifreeze
container. Select the mixing ratio of the
water/antifreeze as per the instructions
of the antifreeze manufacturer.
 Check the antifreeze concentration with
a commercially available antifreeze
tester and adapt if necessary.
 Open the filling hole of the float contain-
er. In order to do so, loosen the wing
screw and push the cover to the left.
 Fill 20 litres of antifreeze into the float
container and close the filling hole.
 Align the actuation lever of the ball tap
for antifreeze vertically.
 Align the actuation lever of the ball tap
return switchover vertically.
 With cold engine only:
To preheat the motor, turn the key
switch to the left and hold it until the in-
dicator light preheating goes out.
 Turn key switch to position "I". The indi-
cator lamp for operational readiness
lights up.
The control voltage is switch on and the
display shows the operating status "An-
tifreeze".
 Turn the key switch to the right until the
motor is running.
The antifreeze liquid is pumped through
the appliance in a circuit.
 Lead the residual water via the frost
protection hose into the anti-freeze con-
tainer.
 As soon as antifreeze exits the anti-
freeze hose, put the operating lever of
the frost protection ball tap in the hori-
zontal position and wait for 5 seconds.
 Switch off the motor.
 Set the power switch to "0/OFF" (burner
off).
9
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EN
Pumping antifreeze out of the high
pressure system
Note: Prior to operation, the antifreeze
must be pumped from the high-pressure
system back into the antifreeze container.
 Align the actuation lever of the ball tap
for antifreeze vertically.
 Connect the high-pressure hose to the
frost protection inlet.
 Connect the water hose to the return
flow of the frost protection.
 Open the filling hole of the float contain-
er. In order to do so, loosen the wing
screw and push the cover to the left.
 Fill 20 litres of fresh water into the float
container and close the filling hole.
 Set the power switch to the operating
mode "frost protection".
 With cold engine only:
To preheat the motor, turn the key
switch to the left and hold it until the in-
dicator light preheating goes out.
 Turn key switch to position "I". The indi-
cator lamp for operational readiness
lights up.
The control voltage is switch on and the
display shows the operating status "An-
tifreeze".
 Turn the key switch to the right until the
motor is running.
The antifreeze fluid is forwarded from
the float container into the antifreeze
container with fresh water.
 Rinse for approx. 2 minutes until the an-
tifreeze container is filled.
 Switch off the motor.
 Set the power switch to "0/OFF" (burner
off).
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