User Manual
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Building Technologies M-bus System CE1P5361en
HVAC Products 2 System components 08.02.2007
2.2.6 Spare parts
For upgrading the OZW10, the most recent software version can be ordered as a sepa-
rate item:
Product Part number
Program memory OZW10
74 340 0002 0
It is always the most recent version that is supplied. When ordering the above part
number, 16 pairs of OTP will be supplied. Smaller quantities cannot unfortunately be
provided.
To change the OTPs, proceed as follows:
1. Save the billing file.
2. Open the OZW10 (screw on the front of the unit at bottom right).
3. Disconnect power supply to the OZW10 (terminal strip on the right).
4. Remove the OTPs (labeling: OZW10 Vx.y date A/B) with a suitable tool (pair of IC
or PLCC pliers).
5. Fit the new OTPs: A on the right, B on the left.
Ensure that the beveled edge of the OTPs is at top right.
6. Connect power supply again.
7. Acknowledge error message "Error 12" by pressing the button.
Check if the plant is still stored in the list. If not, recreate the device list (page 4, line 47).
2.3 M-bus central unit OZW111
2.3.1 Introduction
The M-bus central unit is used for the remote readout, remote operation and monitoring
of M-bus plant with a maximum of 5 consumption meters and controllers having an M-
bus connection facility conforming to EN 1434-3.
2.3.2 Use
The M-bus central unit is designed for remote monitoring of district heating systems
and for consumption cost billing in multifamily houses.
Among others, the following types of M-bus devices can be connected:
Heat meters SONOHEAT
®
, MEGATRON
®
2, SONOGYR
®
energy*,
SONOGYR
®
WSD…*
Consumption meters via pulse adapter AEW21.2, Relay PadpulsM1
Heat cost allocators MEMOTRON
®
2 WHE21*
District heating controllers SIGMAGYR
®
RVD2…
Not supported are the following types of devices:
District heating controllers SIGMAGYR
®
RVP97
Consumption meters of the Siemeca™ AMR system
Other M-bus devices on request.
* Product no longer available, but still supported
M-bus meters
M-bus controllers