13
IT
EN
MBV
Madas Technical Manual
- 1|1.8a - REV. 0 of 21
th
Jun 2019
• Tighten the nuts or bolts gradually, in a “cross” order (see the example below);
• Tighten them, first by 30%, then by 60%, and finally 100% of the maximum torque (see the table below according to
EN 13611);
Diameter
DN 40 DN 50 DN 65 DN 80 DN 100 DN 125 DN 150
> DN 150
Max. torque (N.m)
50
50
50
50
80
160
160
160
• Tighten each nut and bolt again clockwise at least once, until the maximum torque has been achieved uniformly;
• The device can also be installed vertically without prejudicing correct operation;
• During installation, avoid debris or metal residues from getting into the device;
• To guarantee mechanical tension-free assembly, we recommend using compensating joints, which also
adjust to the pipe’s thermal expansion;
• If the device is to be installed in a ramp, it is the installer’s responsibility to provide suitable supports or correctly sized
supports, to properly hold and secure the assembly. Never, for any reason whatsoever, leave the weight of the ramp only on
the connections (threaded or flanged) of the individual devices;
• In any case, following installation, check the tightness of the plant;
• Wiring cannot have cables connected directly to the coil.
ALWAYS and ONLY
use the connector identified by the
manufacturer;
3.3 - WIRING THE CONNECTOR/TERMINAL BOARD
Solenoid valve wiring with encapsulated coil (see fig. 2)
• Before wiring the connector (
7
), unscrew and remove the central screw (
8
). Use proper cable terminals (see figure
A
).
NOTE:
Connector (
7
) wiring must be do ensuring a product rating of IP65;
• Wire the connector (
7
) with 3x0.75mm² cable with external Ø 6.2 to 8.1 mm. The cable must have double sheathing, be
suitable for use outdoors, with minimum voltage of 500V, and minimum temperature of 105°C;
• Connect terminals 1 and 2 to the power supply and the earth cable to terminal .
IMPORTANT
: with voltage 24 Vdc it is
mandatory to respect the polarities
(normal plugs: pin1 plug = / pin2 plug = );
(plugs with energy saving: pin1 plug = / pin2 plug = );
• Secure the connector (
7
) to the coil (
2
), tightening (recommended tightening torque 0.4 N.m ± 10%) the centre screw (
8
);
• The valve needs to be earthed either through the pipe or through other means (ex. cable jumpers).
fig. A
