Madas EVP/NC Manual Tecnico página 13

4.0 - FIRST START-UP
• Before start-up make sure that all of the instructions on the rating plate, including the direction of flow, are observed;
• After having gradually pressurised the system, check tightness and operation of the solenoid valve, electrically
powering / disconnecting the connector ONLY IF connected to the coil.
IMPORTANT NOTE: Do not use the connector as a switch to open/close the solenoid valve.
4.1 - RECOMMENDED PERIODIC CHECKS
• Use a suitable calibration tool to ensure the bolts are tightened as indicated in 3.2;
• Check tightness of the flanged/threaded connections on the system;
• Check tightness and operation of the solenoid valve;
It is the responsibility of the final user or installer to define the frequency of these checks based on the severity of the service conditions.
4.2 - ADJUSTMENTS (Models EVPF/NC - EVPCF/NC)
• The flow regulation (if present) can be done with the system stopped and the valve NOT electrically powered. It is
recommended to wait for the coil to cool down (if previously powered) and/or, to use suitable thermal protections
for hands;
• To make this adjustment, you need to unscrew the fastening nut (12) and turn the adjustment screw (13). When you are
finished, tighten and secure the fastening nut in its original position.
5.0 - MAINTENANCE
No maintenance operations need to be carried out inside the device.
If the coil and/or connector need to be replaced:
• Before performing any operation, make sure that the device is not electrically powered;
• Since the coil is also suitable to be permanently powered, coil heating in case of continuous operation is an entirely
normal phenomenon. It is advisable to avoid touching the coil with bare hands after a continuous power supply lasting
longer than 20 minutes. In case of maintenance, wait for the coil to cool down or, if necessary, use suitable protections;
NOTE: if the coil (11) needs to be changed following an electrical failure, we recommend changing the connector (1) as well. The coil
and/or connector replacement operations need to be carried out taking care to ensure the product's IP65 rating.
5.1 - REPLACING THE CONNECTOR
• Unscrew and remove the central screw (14), then remove the connector (1) from the coil (11);
• When you have taken out the existing internal electrical wiring, wire the new connector and secure it to the coil, as shown in 3.2;
5.2 - REPLACING THE COIL
• Unscrew and remove the central screw (14), then remove the connector (1) from the coil (11);
• Loosen the screw (or nut) (12) that locks the coil (11) and take it out from the armature assembly along with the seals/discs;
• Place the new coil + seals + discs inside the armature assembly and secure with the relative screw (or nut);
6.0 - CPI SWITCH
The microswitch that signals the closed position (CPI SWITCH) is a magnetic proximity sensor with normally open contact. It
provides a signal when the valve obturator closes.
If the solenoid valve comes with the microswitch, the position of the sensor is already calibrated and set, therefore, for operation
you simply need to connect it to the power supply.
If it comes separately and is installed at a later time on a solenoid valve with CPI set-up, follow the instructions provided in
paragraph 6.2
6.1 - CPI SWITCH TECHNICAL DATA
• Ambient temperature
• Switchable voltage
• Switchable current
• Switchable power
• Resistance
• Protection rating
• Cable length
Madas Technical Manual - REV. 0 of 10
: -20 ÷ +60 °C
: max 1000 V (dc or ac peak)
: max 1 A (dc or ac peak)
: max 40W ohmic
: 200 mΩ
: IP65
: max 5m
May 2018
th
CPI wiring diagram
open valve / open contact
closed valve / closed contact
13
SPST
EVP - EVPC.../NC