Non-Return Valve; Electrical Connections - DAB EVOPLUS B 120/220.32 M Instrucciones Para La Instalación Y El Mantenimiento

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ENGLISH
Ensure that the connecting cable of the pressure sensor never
comes in contact with the motor casing.
Figure 3: Installation on horizontal pipes

7.3 Non-return valve

If the system is equipped with a non-return valve, ensure that the min-
imum pressure of the circulator is always higher than the valve closing
pressure.

8. ELECTRICAL CONNECTIONS

The electrical connections must be made by expert, qualified personnel.
ATTENTION! ALWAYS RESPECT THE LOCAL SAFETY REGULA-
TIONS.
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Always switch off the mains power supply before working on the
electrical or mechanical part of the system. Wait for the warn-
ing lights on the control panel to go out before opening the ap-
pliance. 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 appli-
ance must be earthed (IEC 536 class 1, NEC and other applicable
standards).
THE SYSTEM MUST BE CORRECTLY AND SAFELY EARTHED!
It is recommended to install a differential switch to protect the
system, which must have correct dimensions, such as: Class
A with adjustable leakage current, selective, protected against
sudden tripping.
The automatic differential switch must be marked with the fol-
lowing two symbols:
- The circulator does not require any external motor protection.
- Ensure that the supply voltage and frequency are the same as the val-
ues indicated on the electrical data plate of the circulator.
Figure 4: Electrical connections (front) Figure 5: Electrical connections (rear)