Madas EVPF/NC Manual Del Usuario página 13

4.2 - ADJUSTMENTS (Models EVPF/NC)
• The flow adjustment must be done with the system stopped and the valve NOT electrically powered. It
is recommended to wait for the actuator to cool down (if previously powered) and/or to use suitable thermal
protection for hands;
• Unscrew the fastening screw (17) and move the protective casing upwards (6) into the position shown in fig. 1.
• Loosen the screw (18) and move the switch (19) by sliding it along its pin. The more the switch is moved upwards, the more
the max flow of the solenoid valve is limited. Once the switch (19) has been set in place, secure the position by tightening
the screw (18). The setting range is marked with the min and max indications.
• IMPORTANT: verify that the switch de-energises the pump at the set position.
4.3 - ADJUSTING THE SLOW OPENING (EVPR/NC models)
• The cap (3) must be removed to make the adjustment. The position of fig. 2 corresponds to the maximum opening speed
(preset factory value). Increase the opening time (slow down the actuator speed) by rotating the screw (2) clockwise with
a 14mm socket wrench. NOTE Changes to the inlet pressure and room temperature can affect the valve opening time.
5.0 - MAINTENANCE
If the actuator needs to be replaced:
• Before performing any operation, make sure that the device is not electrically powered;
• It is advisable to avoid touching the actuator with bare hands after a continuous power supply lasting longer than
20 minutes. In case of maintenance, wait for the actuator to cool down or, if necessary, use suitable protection;
NOTE: The replacement steps of the actuator must be carried out by taking care to ensure the product's IP65 protection rating.
5.1 - REPLACING THE ACTUATOR UNIT (24)
• Unscrew the fastening screw (17) and move the protective casing upwards (6) into the position shown in fig. 4;
• Loosen the fastening screws (7) and (18). Rotate both microswitches (8) and (19) by 180° as shown in fig. 4 and secure
them temporarily in this position;
• Loosen and remove the fastening screws (5);
• The actuator unit (24) can now be removed (by pulling it upwards);
• Position the new actuator unit (24) in the same position as the previous one and secure it by tightening the screws (5);
• Reposition the microswitches (8) and (19) in the original position (see fig. 1 - microswitch (8) optional);
• If present, position the microswitch (8), rotating it so that when the valve is closed, the disc (20) closes the contact (see Fig. 1);
• Follow the instructions in 4.2 for the flow adjustment switch (19);
• Lower the protective casing (6) and secure it with the screw (5);
• Wire the new actuator unit electrically by following the instructions in 3.2 and 6.2;
• Energise and de-energise the solenoid valve 2 or 3 times, verifying its complete opening and closure, thereby testing it
functions correctly after maintenance is performed.
6.0 - CPI SWITCH
If the solenoid valve comes with the CPI switch, the position of the sensor is already calibrated and therefore set for operation.
Just connect it electrically to the connector (29) marked with "CPI SWITCH".
Follow the instructions in paragraph 6.2.
6.1 - CPI SWITCH TECHNICAL DATA
• Ambient temperature
• Switchable voltage
• Switchable current
• Protection rating
Madas Technical Manual - 1|1.2e - REV. 0 of 10
: -20 ÷ +60°C
: max 250 V (Vac)
: max 2 A
: IP67
13
May 2018
th
CPI wiring diagram
SPDT
EVPF/NC - EVPR/NC