wtw TecnoLine LF 171, Operating Manual

Page: 69 / 124

Installation notes
73
1. General information:
•
All instruments which are installed in the open have to be assembled with a shed (see WTW
accessories).
•
For normal operation in the open the housing cover has to be closed (IP66 ).
•
All inputs/outputs do not need an additional lightning protection, all lightning protection
devices are integrated in the instrument, existing lightning protection devices can be used
additionally.
•
The armoured thread joints have been designed for cable diameters of 10 - 14 mm; see also
chapter "View with removed measuring module".
•
The cables should not be fastened too tight. If the clamps are fastened too tight the cable may
be cut off!
•
Cable ducts (armoured threads) which are not used have to be closed with a stopper in order to
fulfill the IP 66 standard.
If multi-wire cables are lead into the housing to be connected to a
terminal strip, the following must be observed:
Unused wires must not jut into the housing. Otherwise, malfunctions
can occur. This especially applies to the ground wire of the mains
cable.
Cut off unused wires in the housing as close to the armored thread
joint as possible.
2. Mains connection
Installation must only be made by qualified technicians, as the mains
voltage is highly dangerous!
A separation possibility between instrument and mains has to be
provided (e.g. fuse)!
The instruments are designed for 230 V AC or 115 V AC. The mains voltage can be switched over
with a switch on the power supply board. Before putting the instrument into operation always
check whether there is the correct mains voltage or whether the correct voltage has been set (see
also chapter "View with removed measuring module").
Attention:
A wrong or wrong set mains voltage may damage the instrument!