Non-Return Valve; Electrical Connections - DAB EVOSTA2 OEM Installationsanweisung Und Wartung

ATTENTION
Water at high temperature.
High temperature.
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.
8.4

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.

9. 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.
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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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ENGLISH
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