www.trimodbesta.com
9
│
20
LTB010X
│
2016.04
4.
Installation and initial start-up
During installation, the correct operating position must be observed.
For side mounting, observe the “Top” arrow on the type plate.
The float must be able to move freely over the whole range of movement and must not be restricted by
the tanks walls or by fittings in the tank.
Installation positions that are subject to turbulence impair the function and should always be avoided.
Process connection flange - Industrial range
For switches in the industrial range with flanges according to DIN, ANSI, etc., the seals
1)
and
connecting studs
1)
that are used must correspond to the industry standard for material, pressure
class and type of seal and must be tightened to the corresponding tightening torques.
1)
not a component of the supply.
In case of uncertainty on any point, refer to the corresponding standard or consult the manufacturer.
Process connection flange - Standard range
For switches of the standard range PN 25 (360 psi), corresponding seals are supplied with the unit.
Minimum tightening torques and tightening sequence:
Flange D
Seal
Stud
Carbon steel
Stud
Stainless steel
01 / 011 92 mm Garlock Blue Gard 3000
Reinz Chemotherm
3)
18 Nm
2)
22 Nm
2)
2)
Data refer to lubricated studs
3)
High / low temperature application (graphite gasket)
Connecting
1.
Loosen the cover screws, remove the protective plug from the cable entry and fit the cable gland.
2.
Insert the cable and connect to the wires according to the connection diagram (see inside the
housing cover and instructions). All terminal connections are self-opening.
Connection diagram
Type
Function
Connection diagram
B…8
SPDT
BB…8
Dual SPDT
3.
Connect grounding (inside housing) and equipotential bonding
screw (outside, beside cable entry)!
4.
First close the cover and then apply the supply voltage!
5.
Maintenance
Trimod Level switches must be periodically tested and cleaned, at least once annually.
Procedure:
1.
Before opening the housing, disconnect the supply voltage; electric shocks can be life
threatening.
2.
Process vessels / float chambers must be brought to atmospheric pressure before work is carried
out and must be appropriately vented. If necessary, lower the fill level. If the switch is mounted in
Equipotential
bonding screw
Grounding