12
Pre-Filter
Upstreams of the high pressure pump there is a pre-filter (6) installed, which
must be inspected before start-up and cartridge replaced whenever required.
If the machine is run with polluted water or dirty pre-filter severe
damage of the pump and control elements will be the result.
Frost Protection
Frost protection of the entire water system during storage and transport
is a must, as otherwise heavy damage on the system and severe
dangers during operation may occur.
The best frost protection is to store the machine and accessories in a frost-
protected room.
If frost is likely during storage and/or transportation the machine to be
protected as described below:
• Mix 2 l of a 1 : 1 water/anti-freeze liquid (e.g. Glysantin) in a clean
vessel, dip water connecting hose into anti-freeze liquid and start pump.
• Open spray pistol/stop valve and return drawn-off anti-freeze liquid into
the vessel, so allowing the liquid to circulate through the system. The
frost protection switch to be kept pressed during the procedure.
• Spray pistol/stop valve to be opened and closed several times in order
to fill safety/control valve with anti-freeze liquid.
• Stop pump, release frost protection switch and disconnect all hoses.
• Machine is now protected against frost to –30 °C.
Disregarding frost protection instructions will result in heavy
damage of the water carrying components.
Never simply dump anti-freeze liquid but collect it for re-use or
dispose according to environmental regulations.
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