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24
Decalcifying the continuous-flow heater:
Calcified machines use an unnecessary amount of energy because the water can only
be heated slowly and the excess pressure valve feeds a part of the water back into the
pump circuit.
Calcified machines can be recognised by increased pipeline resistance.
Check pipeline resistance by disconnecting the high pressure lance from the gun and
switching the machine on. A full jet of water emerges from the gun. The machine must be
decalcified if the pressure shown on the manometer is greater than 25 bar.
Proceed as follows to decalcify the machine:
1.
Unscrew the high pressure hose from the machine and decalcify it separately.
2.
Put the detergent suction hose into a container of decalcifying solution.
3.
Set the detergent valve to the maximum concentration.
4.
Switch on the machine.
5.
Hold the gun in a separate container and press the trigger.
6.
Wait for about a minute until the decalcifier comes out of the gun
(recognisable by its whitish colour)
7.
Switch off the machine and allow the solution to act for about 15-20 minutes.
8.
Switch the machine back on and rinse with clear water for about 2 minutes.
9.
Now check whether pipeline resistance is back to an acceptable level.
Repeat the decalcifying process if the pressure without the high pressure lance is
still above 25 bars.
Decalcifiers are caustic!
Observe the instructions for usage and accident prevention. Wear
protective clothing to prevent the decalcifying agent from contacting
your skin, eyes and clothing (e.g. gloves, safety mask etc.)
25
Particular rules, directives and
inspections
Inspections performed by Kränzle
- measurement of earth line resistance
- measurement of voltage and current
- inspection of tension consistency with +/- 1530 V
- pressure check of heating coil at 300 bar
- visual and functional check as per the inspection sheet provided
Guidelines for liquid sprayers
The machine conforms with the "Guidelines for liquid sprayers". These guidelines are
issued by the organisation of trade associations and may be obtained from Carl
Heymann-Verlag KG, Luxemburger Str. 49, 50939 Köln. These guidelines specify that
this machine is to be inspected by qualified personnel whenever necessary, but no less
than once every 12 months. These inspections must be recorded in the inspection log at
the end of this manual.
Pressure container and steam boiler directives
Kränzle high pressure cleaning equipment conforms to the pressure container and
steam boiler directive. No construction approval, notification of licence and takeover
inspection are required. The water capacity is less than 5 l.
Duties of owner
The owner is to ensure that all safety-relevant components are in a serviceable condition
before the sprayer is used. (e.g., safety valves, hose and electric cables, spray
equipment etc).
13


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