Power Supply; Temperature Sensor; Getting Started - Siemens 2WR6 Serie Installationsanleitung

3.3

Power supply

The meter is equipped with a long life battery for 6 or 11 years
of operation. You can take the operating time from the dial
plate.
Warning: Do not open the batteries. Do not bring
batteries into contact with water or expose to temper-
atures above 80 °C. Dispose of used batteries at
suitable collection points.
An external feed 24 V AC / DC, galvanically separated, is
available as a special version.
3.4 Electronic unit interfaces
The meter is equipped with an optical interface with M-Bus
protocol as standard.
3.5 Communication
If the meter is equipped with one of the options "M-Bus", "Mini-
bus" or "Pulse Output", it is supplied with a two-core connec-
tion cable. You can extend the connection cable with a 2 x
0.75 mm² cable. Observe the polarity for the pulse output when
connecting (brown: +; white: -).
Note: When reading via M-Bus, the permissible aver-
age reading frequency must not be exceeded (1 ×
every 3 h at 2400 Bd, 1 × every 24 h at 300 Bd). A
read-out with a higher frequency is not permitted and it
could lead to incorrect functioning of the meter.
3.6

Temperature sensor

Note: Wires must not be separated, shortened or
extended.
4. Parameterisation
Adjustable parameters
01.01. - - S Annual reference date (01.01. --)
01.08.12 D Date (01.08.2012)
15.33.06 T Time (15:33:06)
2 3 4 5 6 7 8 K Property no. or M-BUS
(secondary address)*
123 A Primary address*
Ft + Reset missing time
Nb - - - - - Return to normal mode
*) If the meter is already connected to the M-Bus, set a change of voltage at the M-
Bus for assimilation of a new M-Bus address.
Call up parameter operation
Proceed as follows to call up the parameter operation:
•
Hold the button for 10s
The LCD switches into the service loop.
•
Press the button repeatedly until the LCD for code input
- - - - - - C is displayed.
•
Hold down the button to change to the input mode.
•
Input the current meter date.
The LCD switches into the parameterisation loop. The pull-
down menu switches to the next menu point every 1.5 s.
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Parameterisation
For parameterisation proceed as follows:
1. Press the button as soon as the desired function is dis-
played in order to select the function.
2. Hold down the button to set the value.
3. Press the button for a short time to select the set value
which is blinking.
The next point to the right flashes. Repeat step 2 and 3 for all
points.
•
The LCD shows a star symbol briefly to confirm.
If inputs are incorrect, parameterisation can be repeated.
Completing parameterisation
Proceed as follows to leave the parameterisation operation:
•
Press the button when the display Nb ----- is displayed.
The meter leaves the parameterisation operation automatically
after 10 mins of inactivity.
5.

Getting Started

For activation proceed as follows:
•
Open the slide valves gently.
•
Check the plat for leak-tightness and bleed air out carefully.
The message "F0" disappears after 100 sec at the most.
•
Check the measured values for flow and temperatures for
plausibility.
•
Vent the heating system until the flow display is stable.
•
Regulate the heating system with the flow display.
•
Seal the sensors to protect against manipulation.
•
Fit the user locks to the fittings and the sensors.
•
Read the meter status for energy, volume, operation and
missing time and note the values.
Recommendation: Reset the maxima and the missing time.
Installing the user locks
Two so-called "self-lock" seals are provided for the meter with
which the flow sensor and the measuring unit fitting can be
sealed.
Fig.7: Example of flow sensor
Error messages for incorrect installation:
Error "incorrect flow direction (negative)"
Check that the flow direction arrows on the volume measurement unit
match the flow direction of the system. If the directions do not match,
turn the volume measurement unit through 180°.
Error "negative temperature difference"
Check whether the sensors are installed correctly. If the sensors are
not installed correctly, change the installation position of the sensors.
Heating meter:
Temperature sensor in the flow-pipe with higher temperatures; temper-
ature sensor in return-pipe with lower temperature
Cooling meter:
Temperature sensor in the flow-pipe with lower temperatures; tempera-
ture sensor in return-pipe with higher temperature
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