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FR
EN
IT
16
XVF-1-3-6 - XVR-1-3-6
Madas Technical Manual
- 1|1.5eX - REV. 0 of 1
st
Aug 2019
4.3 - ADJUSTING THE SLOW OPENING (XVR 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
All maintenance operations must be carried out in the absence of an explosive atmosphere.
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 electrically to the cable (
29
) marked with “CPI SWITCH”.
Follow the instructions in paragraph 6.2.
6.1 - CPI SWITCH TECHNICAL DATA
• Ambient temperature
: -20 ÷ +60°C
• Switchable voltage
: max 250 V (Vac)
• Switchable current
: max 2 A
• Protection rating
: IP67
6.2 - CPI SWITCH WIRING
It is necessary to work in a non-explosive atmosphere and shut off the gas before installation.
• ATTENTION:
The CPI switch is supplied with a 3 metre long pre-wired connection cable. This cable
CANNOT
be
replaced with a different one. In the event of damage, the part must be disposed of and replaced with an identical new one;
Any repair (if possible) can only be carried out by the manufacturer;
• In the dangerous zone, wire the ends of the cable with explosion-proof approved equipment (E.g. Terminal box with “E”
protection or increased safety according to EN 60079-7) using the special wire terminals;
• Connect the CPI cable (
29
) in series to the signalling device (see diagram 2 - fig. 5).
CPI wiring diagram
SPDT
