ENGLISH
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ATTENTION
System under pressure
- Before dismantling the pump, empty the system or close the interception valves on both sides of the pump. The pumped liquid may be at a very high temperature and high pressure.
15.4
Non-return valve
If the system is equipped with a non-return valve, ensure that the minimum pressure of the circulator is always higher than the valve closing pressure.
16.
ELECTRICAL CONNECTIONS
The electrical connections must be made by expert, qualified personnel.
ATTENTION! ALWAYS RESPECT THE LOCAL SAFETY REGULATIONS.
Always switch off the mains power supply before working on the electrical or mechanical part of the system. Wait for the warning lights on the control panel to go out before opening the appliance. The capacitor of the direct current intermediate circuit remains charged with dangerously high voltage even after the mains power has been turned off.
Only firmly cabled mains connections are admissible. The appliance must be earthed (IEC 536 class 1,
NEC and other applicable standards).
THE SYSTEM MUST BE CORRECTLY AND SAFELY EARTHED!
It is advised to install a correctly dimensioned differential switch to protect the system, type: class A with adjustable leakage current, selective.
The automatic differential switch must be marked with the following symbols:
The circulator does not require any external motor protection.
Ensure that the supply voltage and frequency are the same as the values indicated on the electrical data plate of the circulator.
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