23
7.1 Start-up
•
Start the pump without a load after having set the pressure regulating valve to “zero” or
by opening the relief devices if any.
•
Make sure that the speed rate does not exceed the value on the data plate.
•
Before bringing the pressure to the required value, wait until all the air in the circuit has
been released and that water flows out in a constant, continuous jet.
In winter and when there is a risk of freezing temperatures, it is essential to make sure
that there is no ice in the entire circuit (feeding and delivery) before starting the pump.
Do not start the pump before having allowed the circuit to completely thaw.
7.2 Use
Warning! If used improperly, the high-pressure jet can cause damage to persons,
animals and things.
Apart from regulating the pressure,
no other operations are required when the
system is operating
. For example, the pressure must be reduced to zero and
the pump stopped before tightening a plug or union, checking a high-pressure
pipe or other.
•
The jet of water must always be directed towards the work area even during preliminary
tests and inspections.
•
Do not start the pump before having directed the jet towards the work area.
•
The area covered by the jet must be cordoned off and cleared of all objects which could
be damaged or blown away if hit by the jet.
•
Always pay attention to the direction taken by the debris removed by the jet of water.
Use panels or baffles to protect items which could be accidentally hit by the debris.
•
Excessively high pressures could damage the objects which need to be cleaned. It is
advisable to perform preliminary tests (operating pressure, distance of the nozzle from
the object, etc.).
Idromeccanica Bertolini S.p.A.
declines all civil or criminal liability for damage to persons or
things caused by improper use of the pump and the other parts of the system in which the
pump is installed.
7.3 Leaking water from the gaskets
•
Small amounts of water (a few drops per minute) that spill from the outlet zone in the
lower part of the crankcase are perfectly normal as to correct pump operation.
7.4 How to stop the pump
•
Only stop the pump after having reduced the pressure to zero by means of the
regulating valve or other relief devices.
•
If chemicals are used, it is essential to thoroughly wash the pump by allowing it to run for
a few minutes with clean water. After this, empty the pump by disconnecting the suction
part and allowing it to
operate for about 20 seconds.
•
In winter, when the pump is exposed to cold weather or if it is to remain idle for a long
period of time, it is essential to empty all residues of water from the circuit or mix
antifreeze liquid with clean water in the correct proportions.
Summary of Contents for 74.1030.97.3
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