Installation - Pentair ZIEGLER ENGINEERING DigiTrace T-M-20-S/EX Serie Mode D'emploi

5. Installation

For installation/operation, always observe the Equipment Safety Law, the rules of
generally accepted engineering practice (EN 60079-14), and the instructions stated in
this Manual. Carry out work on and recalibrations of the thermostats in the deenergized
state only.
5.1 Regulations and notes
• Electrical connection must only be carried out by qualified personnel.
• The choice of cable, the installation and the electrical connection must conform to the
requirements of VDE 0100 "Regulations for the installation of power circuits with nominal
voltages below 1000 V" or the appro- priate local regulations.
• If contact with live parts is possible when working on the device it must be completely
disconnected from the electrical supply.
• Ground the device to the protective earth at the PE terminal. The cross section of this cable
must be at least the same as that of the supply cables. Wire the grounding conductors in a star
configuration to a common earth point that is connected to the protective earth of the voltage
supply. Do not loop the grounding cables, that is, do not run them from one device to another.
• Apart from faulty installation, incorrect settings on the thermostat may also adversely affect
the proper functioning of the process or cause other damage. Adjustments should only be
made by qualified personnel. The relevant safety regulations must be observed.
• The thermostat and controller and safety temperature limiter T-M-20-S/+x+y/EX is used for
controlling or limiting the temperature of electric resistance heaters in potentially explosive
atmospheres. It is designed for stationary installation only.
• This device is a sensitive piece of equipment. As such it might be sensitive to vibrations. When
installed on vibrating or oscillating surfaces it is recommended to use some damping material
in order to avoid nuisance tripping of the temperature limiter.
• Each temperature sensor and each switch circuit must have its own cable entry. Only those
cable entries intended for the switch circuits may be used for them.
• The temperature sensors must be installed in such a way that their geometry, and therefore
their volume, is not altered in any way. No metal straps may be used for fastening, because
they could deform the sensor when tightened. For this reason the use of fibre-glass self-
sticking tapes is recommended.
• Install the capillary tube to give it as much protection as possible, and be sure to observe the
minimum bending radius of 5 mm. Avoid bending the capillary tube repeatedly, because this
can cause hairline cracks. Make the electrical connection as shown in the figure.
• Be particularly careful not to mix up the "heating connection" and the "cooling connection".
Prior to the startup it is necessary to verify the correctness of these connections once again.
Then carry out a functional check, and be absolutely sure to record it.
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