DAB 500 Series Instruções e manual de instruções - Página 6

Procurar online ou descarregar pdf Instruções e manual de instruções para Bomba de água DAB 500 Series. DAB 500 Series 17 páginas. Circulating pumps

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 mini-

mum pressure of the circulator is always higher than the valve closing

pressure.

8. ELECTRICAL CONNECTIONS

TIONS.

Always switch off the mains power supply before working on

the electrical or mechanical part of the system. Wait for the war-

ning 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.

pliance must be earthed (IEC 536 class 1, NEC and other appli-

cable standards).

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)