Madas EVP/NC Manual Del Usario página 21

5.3 - REPLACING THE FILTER ELEMENT (DN 65 - DN 80 - DN 100 - DN 125 - DN 150)
If internal checks must be carried out, before carrying out any operations:
• Close the gas upstream of the valve;
• Make sure there is no pressurised gas inside the device.
NOTE: given its weight, it is recommended to carry out the following operations after having removed the coil (see
paragraph 5.2 - images m-n-o-p-t-u coil removal and repositioning)
• Loosen the fastening screws (17) and very carefully remove the cover (6) from the valve body (7);
• Extract the filter element (15) and check its condition. Blow it and clean it and, if necessary, replace it (see fig. 6 and 7 for
positioning);
• Check the status of the cover's O-Ring (16) and replace, if necessary;
• Make sure the cover's O-Ring (16) is inside the provided groove;
• Reassemble the cover (6) and secure it in its original position, being very careful not to "pinch" or damage the O-ring (16)
during tightening;
• Tighten the screws gradually, following a "cross" pattern, until the torque (tolerance -15%) indicated in table 4 on page 51 is
reached. Use a calibrated torque wrench to do this;
• Check the body/cover seal;
NOTE: for internal inspections, it is recommended to:
• also check the obturator's (10) integrity and, if necessary, replace the rubber seal (12);
• replace the seals before reassembling.
6.0 - CPI SWITCH
The microswitch that signals the closed position (CPI SWITCH) is a magnetic proximity sensor with a normally open contact. It
provides a signal when the valve obturator closes.
If the solenoid valve comes with CPI, 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
6.2 - CPI SWITCH INSTALLATION and CALIBRATION
It is necessary to close the gas prior to installation.
NOTE: CPI connector (24) wiring must be do ensuring a product rating of IP65;
• Remove the cap (11) under the valve body (7) and remove the aluminium washer (found between the cap and body);
• Instead of the cap (11), tighten the CPI ring nut kit (22). Make sure that between body (7) and kit (22) there is the new
aluminium washer or an O-Ring (26);
• Tighten the CPI ring nut kit (22) to the valve's body (7) with a special commercial spanner;
• Before wiring the CPI connector (24), unscrew and remove the central screw (37);
• Connect the CPI connector (24) terminals 1 and 2 in series to the signalling device. Use proper cable terminals (see the
figures in 3.2);
• Wire the CPI connector (24) with 2x1mm² cable with external Ø of 6.7 mm. The cable must be in double sheath, suitable
for outdoor use, with a minimum voltage of 500V and a temperature of at least 90°C;
• Secure the CPI connector (24), tightening (recommended tightening torque 0.4 N.m ± 10%) the centre screw (37);
• To calibrate the microswitch, loosen the fastening nut (23) and position (by screwing on or off) the adjustment ring nut (25)
so that, with the solenoid valve in a closed position, the CPI provides the signal;
• Secure the adjustment ring nut (25) in that position by tightening the nut (23);
• The kit is now installed. Open and close the solenoid valve (by supplying and cutting off power) 2-3 times to make sure the
microswitch is signalling correctly.
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
21
SPST
EVP/NC - EVPF/NC