ENGLISH
GB
26
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.
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pliance must be earthed (IEC 536 class 1, NEC and other appli-
cable standards).
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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.
Ensure that the connecting cable of the pressure sensor never
comes in contact with the motor casing.
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
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TIONS.
Figure 3: Installation on horizontal pipes
Figure 4: Electrical connections (front)
Figure 5: Electrical connections (rear)
