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Connection diagram
Grounding
Equipotential
bonding screw
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
a chamber, close the corresponding shut-off valves and, depending on the requirement, empty or
vent the chamber.
3.
Loosen the flange connection and remove the switch.
4.
Check the float and mechanism for damage and contamination.
5.
Remove deposits and metal particles by means of suitable and approved methods. Care must be
taken to ensure that no mechanical damage occurs as a result of the cleaning.
6.
In the case of floats with protective bellows, the bellows must be removed before cleaning and
should be cleaned separately, both internally and externally.
7.
Check the float and mechanism for complete deflection, as well as for smooth and unrestricted
operation.
8.
In the event that it becomes necessary to replace individual components, please note that only
original spare parts, split pins, float, switch module, etc. may be installed.
9.
After completion of the cleaning / inspection work, the switch module must be checked for correct
function by means of an acoustic continuity tester or similar device with simultaneous deflection
of the float, followed by recording in the inspection log book.
10. In order to guarantee the absence of leaks between process vessel / float chamber, the flange
seal must be replaced after each dismantling.
11. After carrying out the inspection work, the device is re-fitted at the intended location.
6.
Replacement of the switch module
Defective controller modules must be replaced with new, works-tested units. In order that the complete
type designation can be stamped on the type plate, the complete designation of the existing controller
must be specified at the time of ordering. If a complete identification of the controller is not possible,
then the manufacturer should be consulted before dispatching the complete device.
Example:
Complete type number of the switch
Incomplete data of replacement switch module
Complete the type number with 01 04
www.trimodbesta.com
Type
Function
ZK...8
SPDT
Z2K...8
Z5K...8
ZU...K...8
Z5U...K...8
ZKK...8
Dual SPDT
Z2KK...8
Z5KK...8
ZU...KK...8
Z5U...KK...8
11 │ 24
Connection diagram
ZK8 01 04
ZK8
►
ZK8 01 04
LTB007X │ 2016.04
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