Electronic Unit - Siemens 2WR6 Serie Installationsanleitung

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If you install the meter as a cooling meter, follow the appro-
priate notes.
Installation Guidelines
Inlet or outlet channels are not necessary. If you install the
meter in the common return of two circuits, determine a place
of installation with a minimum distance of 10 x DN from the T-
piece. This distance ensures a good thorough mixing of the
different water temperatures. You can install the temperature
sensors in T-pieces, ball valves, directly immersed or in pock-
ets depending on the version. The temperature sensor ends
must reach to at least the middle of the pipe cross section.
Note: During installation it must be ensured that no water
can enter the electronic unit during operation.
Example of installation
T-piece
Fig.1: Example of integration with T-piece and meter with 110mm fitting
Ball valve
Fig.2: Example of integration with ball valve and meter with 190mm fitting
Installation guidelines for sensor adapter set (sensor
directly immersed)
A mounting set is included for meters with 5.2 x 45 mm tem-
perature sensor. With this you can fit the temperature sensor
directly immersed into an insert or a ball valve, for example.
1. Install with O-ring at the point of installation with the fit-up
aid/pen provided.
2. Place both halves of the plastic bolting round the 3 notches
of the temperature sensor.
3. Press the bolting together and screw the bolting hand tight
into the point of installation until it comes to a stop (tighten-
ing torque 3 ... 5 Nm).
1. 2.
Fig.3: Mounting adapter set
Siemens Building Technologies
3.
3.1 Installation for cooling metering
When installing as a cooling meter it is essential that the black
cover on the measuring tube is pointed to the side or down-
wards in order to avoid problems with condensation forming.
Fit the immersion sleeves so that the temperature sensor is
positioned vertically downwards or horizontally.
Note: Always install the volume measurement unit on the
hot side.
Fit the electronic unit separately to the volume measurement
unit, e.g. on the wall. Make a loop downwards in order to pre-
vent the condensation running along the connected lines into
the electronic unit.
Fig.4: Recommended installation position for cooling metering
3.2

Electronic unit

The ambient temperature of the electronic unit must not ex-
ceed 55 °C. Avoid direct sunlight. For water temperatures
between 10 °C and 90 °C you can fit the electronic unit on the
volume measurement unit or on the wall.
Align electronic unit
Proceed as follows to align the electronic unit:
1. Pull the electronic unit away from the volume measurement
unit.
2. Turn the electronic unit to the left or right through 90° or
through 180° as required.
3. Push the electronic unit onto the adapter plate in this posi-
tion until it clicks in.
3.
Fig.5: Computer unit installation position
Wall fitting (split fitting)
Fit the meter to the wall at water temperatures below 10 °C and
above 90 °C. Proceed as follows:
•
Pull the electronic unit off the volume measurement unit.
•
Unscrew the adapter plate from the volume measurement
unit.
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Fit the adapter plate to the wall.
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Push the electronic unit onto the adapter plate.
Fig.6: Securing plate and wall fitting
CE2M5378xx
Transducer cover
2. 1.
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