10
Device structure / Technical data
•Installation: sucient spacing (250 mm) between the computer unit and possible sour-
ces of electromagnetic interference • Do not connect to the building’s earthing • Select
a good, dry, easily accessible place • Energy-saving mode (display o)
• Individual remote reading with optional plug & play modules (M-bus, pulse)
Installation
General installation instructions
ÖObserve the environmental conditions!
ÖNote the cable lengths: Volume measuring section: max. 10 m (use shielded cable),
temperature sensor: max. 10 m.
Securing the computer unit on the wall
Install the computer unit on the wall with the enclosed mounting material.
Installing the temperature sensors
!Temperature sensors must only be installed as they have been delivered.The
cables may neither be shortened nor extended.
•The temperature sensor type (Pt 500) must agree with the specifications on the name
plate of the computer unit.
•Do not lay the temperature sensor cable near cable ducts or channels (min. 300mm).
•The temperature sensors can be installed in special ball valves or immersion pockets
which are authorised for this type of sensor. – Observe the national regulations.
Be careful to install the temperature sensors symmetrically. Preferably directly immer-
sed.
Directly immersed installation
1Remove the pressure from the sensor installation location
2Unscrew the closing screw from the special ball valve.
3Place the enclosed O-Ring on the assembly pin. Only use one O-Ring.
When replacing sensors, replace the old O-Ring with a new one.
4Using the assembly pin, turn the O-Ring into the bore hole of the screw plug with a
rotating movement.
5Place the O-Ring in its final position using the other end of the assembly pin.
6Place the assembly pin with the sleeve end over the temperature sensor as far as it
will go.
7Position and attach the attachment screw (plastic nut or brass union piece) on the
temperature sensor.
8Remove the assembly pin from the temperature sensor.
9Insert the temperature sensor into the ball valve and tighten the union joint hand-
tight.
Installation in immersion pockets
•Sensor immersion pockets are best installed inT-pieces with 45° or 90° angles. In
the process, the tip of the immersion pockets points against the flow direction and is
located in the middle of the flow.
•Can only be used in combination with approved immersion pockets !
•Insert the temperature sensor into the immersion pockets as far as it goes
