Gyr GmbH
Subject to change without prior notice
08.05.2017
2
Examples of installation
Ball valve
Fig. 1: Installation with a ball valve (recommended up to and including DN25)
Welding sleeve with pockets
Fig. 2: Installation with pockets (recommended up to DN32)
3.1
Temperature sensors
Note:
The temperature sensor type PT 100/500 must
correspond to the information on the dial plate.
Note:
If detachable temperature sensors are used
they must have their own calibration or certification of
conformity!
Note:
The maximum cable length of the temperature
sensors is 10 m. Extension is not permitted.
Press the 4 side lugs of the housing cover inwards and
remove the cover.
Guide the wire of the temperature sensor from the outside
through the 2nd sleeve from the left and the return sensor
through the 3rd sleeve from the left.
Strip both wires as in the figure 3.
wire end ferrules
Fig. 3
Connect the cores in line with the inscription printed on the
meter.
The 2-wire connection occurs on terminal 5/6 and 7/8.
This also applies to a connection of 2-wire temperature
sensors on a 4-wire connection terminal.
Note:
Do not connect the shielding braid on the cal-
culator side.
Insert the temperature sensors into the pockets, ball-valves
or T-pieces. The end of the temperature sensors must
reach at least to the centre of the pipe cross-section.
Seal the temperature sensors to protect against manipula-
tion.
Put the housing cover in position and press it gently until all
the lugs click into place audibly.
3.2
Connection of flow sensor
Note:
The flow sensor must be installed at the same
circuit as the temperature sensors.
Note:
When a polarity dependent pulse transmitter is
used, take care of the correct orientation.
Connect the negative reference potential (-) or GND on the
right spring-type terminal.
Connect the positive reference potential (+) on the left
spring-type terminal.
If the line has a shielding braid, push the shielding braid
covering over the counter covering of the cable.
For stain relief, fix the line on the outer sheath by a clamp.
Note:
The shielding braid must not be connected to
T550
(UC50…)
when the flow sensor has its own ground
connection.
Note:
The cage clamp terminals can be used for cable
cross-section of 0.5
… 1.5 mm² (solid or stranded). In
order to preserve the IP protection class of the hous-
ing, the outside diameter of the cable sheath shall be
3.7
… 4.4 mm.
Fig. 4
3.3
Electronic unit
The ambient temperature of the electronic unit must not ex-
ceed 55 °C. Avoid direct sunlight.
Wall fitting
Fig. 5: Plan view and cross section of the adapter plate
black
+
green
-