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4.2 - FLOW RATE ADJUSTMENT
• The flow rate must be adjusted with the system stopped and the valve NOT electrically powered. If previously
powered, it is recommended to wait for the opening system (1) to cool down and/or to use suitable thermal
protections for hands;
• Unscrew the retaining screw (18) and move the protective casing (3) upwards to the position shown in fig. 1.
• Loosen the screw (16) and move the switch (15) by sliding it along its pin. The more the switch is moved upwards, the
more the maximum flow rate of the solenoid valve is limited. Once the switch (15) has been positioned, secure its position
by tightening the screw (16). The setting range is marked by the min and max indications.
• IMPORTANT: Check that the switch de-energises the pump to the set position.
• When the operation is completed, reposition the protective casing (3) in the original position and secure it in that position
using the screw (18).
4.3 - OPENING SPEED ADJUSTMENT (EVR models...)
• To make the adjustment it is necessary to remove the cap (2). The position of fig. 1 corresponds to the maximum opening
speed (factory pre-set value). To increase the opening time (slow actuator speed), turn the screw (19) clockwise with a
14mm socket spanner. N.B. Variations in inlet pressure and ambient temperature can affect the valve opening time.
• When the operation is completed, reposition the cap (2) in the original position.
5.0 - MAINTENANCE
If it is necessary to replace the opening system (1):
• Before carrying out any operation, make sure that the appliance is not electrically powered;
• It is advisable to avoid bare hand contact with the opening system (1) after a continuous power supply of more than
20 minutes. In case of maintenance, wait forthe actuator to cool down or, if necessary, use suitable protections;
NOTE: The replacement operations of the opening system (1) must be carried out being sure to guarantee the IP65 degree
of the product.
5.1 - OPENING SYSTEM REPLACEMENT (1)
• Unscrew the retaining screw (18) and move the protective casing (3) upwards to the position shown in fig. 4;
• Unscrew the retaining screw (16), rotate the microswitch (15) 180° as shown in fig. 4 and temporarily fix it in this position.
Perform the same operation if the CPI microswitch (6) --> screw (5) and the OPI microswitch (21) --> screw (20) are present;
• Unscrew and remove the retaining screws (4);
• Now it is possible to remove (by pulling it upwards) the opening system (1);
• Position the new opening system (1) in the same position as the previous one and secure it by tightening the screws (4);
• Replace the microswitch (15) in its original position and secure it with the screw (16);
• If present, position the CPI microswitch (6), rotating it so that when the valve is closed the disc (17) closes the contact (see
fig. 1). Secure it in this position using the screw (5);
• If present, position the OPI microswitch (21), rotating it, so that when the valve is open the disc (17) closes the contact (see
fig. 2). Secure it in this position using the screw (20);
• For the flow rate adjustment switch (15) follow the instructions in 4.2;
• Lower the protective casing (3) and secure it with the screw (18);
• Electrically wire the new opening system following the instructions given in 3.2 and 6.4;
• Power and de-power the solenoid valve 2 or 3 times, checking its complete opening and closing, thus testing correct operation
after maintenance operations.
EVF-1-3-6 - EVR-1-3-6
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Madas Technical Manual - 1|1.5e - REV. 1 of 18
Oct 2023
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