4
EN – Operating instructions QEM / QET
4. GENERAL DESCRIPTION (TECHNICAL CHARACTERISTICS)
• Power supply 1~50/60 Hz 230V ±10% (QEM);
• Power supply 3~50/60 Hz 400V ±10% (QET);
• Main Switch ON/OFF (QEM only)
• Main Switch MANUAL/OFF/AUTOMATIC (QET only)
• Motor overcurrent protection
• Green led: Motor active (ON);
• Red led: Thermal relay protection active (QET only);
• Input for float / pressure switch (QET only);
• Fuses with aM tripping curve (QET only);
• Box in ABS, IP55;
• Ambient temperature: -5/+40 °C;
• Relative humidity 50% at 40 °C (condensate free).
5. INSTALLATION
Ensure that the main power supply specifications corresponds to the voltage specified on the
data plate of the electrical panel and motor connected, then make the earthing connection
before all other connections.
QEM
➞
230V ± 10% 50Hz
QET
➞
400V ± 10% 50Hz
The power line must be protected by a residual current circuit breaker. Tighten the electrical
cables on the relative terminals using a suitable tool correctly sized to avoid the risk of damage
to the fixing screws. Take care if using an electric screwdriver.
6. LUMINOUS INDICATORS AND CONTROL COMMANDS
QEM
By turning the main switch to position (1), the control box starts the pump and turns on the
green led. The pump will remain in operation until the main switch is not turned in the posi-
tion (0).
If an overload occurs in the water pump’s motor, the intervention of the thermal protection
stops the pump and turn off the led. The intervention of the protection is showed when the
thermal protection button drops out. To restore the functioning of the control box after the
intervention of the protection press the button down.
QET
By turning the main switch to the MAN position, the control box starts the pump in manual
mode. green led goes out indicating that the water pump is running. The pump will remain on
until the main switch is not turned to the 0 position.
By turning the main switch to the AUT position, the control box activates the pump only if the
contact wired to the P-P terminals is closed. The pump will remain on until the main switch is
not turned to the position (0) or until P-P contact is not opened.
The amperometric relay will stop the waterpump during a situation of overloading of the mo-
tor. It will turn off the green led and the red led goes out to show the tripping. To restore the
operation of the control box after the intervention of the protection, turn the main switch to
position (0), open the control box, and press down the RESET button.
The automatic reset of the protection can be set by pressing down the reset button and tur-
ning it ¼ turn clockwise (not recommended).
