15
IT
EN
MBV
Madas Technical Manual
- 1|1.8a - REV. 0 of 21
th
Jun 2019
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 pressurized the system, check the seal 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.
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 (
2
) needs to be changed following an electrical failure, we recommend changing the connector (
7
) as well.
The coil and/or connector replacement operations need to be carried out taking care to ensure the product’s IP65 rating.
6.0 - SOLENOID VALVE WITH ENCAPSULATED COIL (see 3.3 and fig.2)
6.1 - REPLACING THE CONNECTOR
• Unscrew and remove the central screw (
8
), then remove the connector (
7
) from the coil (
2
);
• 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;
6.2 - REPLACING THE COIL
• Unscrew and remove the central screw (
8
), then remove the connector (
7
) from the coil (
2
);
• Loosen the screw (or nut) (
1
) that locks the coil (
2
) 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);
