General Instructions - Kärcher HDS 551 C Betriebsanleitung

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GENERAL INSTRUCTIONS

Safety features
* Overflow valve with two pressure
switches
(only HDS 558../698../798..)
When reducing water volume at
pump head or with the servopress
control, the overflow valve will open
and part of the water will flow back
to the pump suction side.
If the handgun is closed thus
causing all the water to return to the
pump suction end, the pressure
switch at the overflow valve shuts off
the pump.
Reopening the handgun causes the
pressure switch at the cylinder head
to switch the pump back on again.
The overflow valve is set at the
factory and lead-sealed. Adjustment
can only be made by After-Sales
Service.
* Pressure switch
(only HDS 551 C)
The pressure switch shuts off the
unit when the handgun is closed and
causes it to cut in again when the
handgun is opened.
* Safety valve
The safety valve opens if the
overflow valve or pressure switch is
defective. The safety valve is set at
the factory and sealed. Adjustment
can only be made by After-Sales
Service.
HDS 551 C, 558 C, 698 C, 798 C, 558 CSX, 698 CSX, 798 CSX
* Low water protection
The low water protection stops the
burner being switched on in the
event of a lack of water. A strainer
stops the protection feature
becoming dirty and requires regular
cleaning.
* Motor protection switch
The motor protection switch
interrupts the circuit should
overloading occur.
Guidelines for liquid spraying
equipment
* The accident prevention
instructions (BGV D 15) Working
with Jet Stream Equipment will
apply. In accordance with these
guidelines, high-pressure spraying
equipment must be checked at
least every 12 months by an
expert and the results of the
inspection recorded in writing.
Order governing boilers
* Test pressure and design of unit
comply with Order governing
boilers as per TRD. The water
content of the heating coil is less
than 10 litres. The boiler section of
the unit is thus not subject to
installation regulations. Local
building regulations are to be
heeded.
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