Installation; Installation Of The Temperature Sensor At The Buffer Cylinder; Electric Connection; Establishing The Bus Connection And Temperature Sensor (Extra-Low Voltage Side) - Bosch ME 200 Installationsanleitung Für Den Fachmann

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Installation

DANGER
Danger to life due to current!
Touching live parts can result in an electric shock.
▶ Before installing this product: Disconnect the heat source and all
other BUS nodes from the mains voltage across all poles.
▶ Before commissioning: mount cover ( Fig. 17 at end of document).
3.1 Installation
▶ Install the module on a wall, ( Fig. 3 to Fig. 5 at end of document),
on a mounting rail ( Fig. 6) or in an assembly.
▶ When removing the module from the mounting rail, refer to Fig. 7 at
the end of the document.
3.2 Installation of the temperature sensor at the buffer
cylinder
When using dual buffer cylinders in which DHW is heated in the upper
part of the buffer cylinder, position the upper buffer cylinder
temperature sensor TB1 so that it cannot be affected by the DHW
heating. TB1 can be positioned at roughly 50-70 % of the height
between the heating flow ( ) and heating return (
3
DHW temperature sensor TW1 high up so it cannot be affected by the
, 
return ( ). Fig. 19 at the end of the document shows the B...-6 type
4 5
buffer cylinder as an example.
When using buffer cylinders heated by a single heat source, position the
upper buffer cylinder sensor TB1 so that the required comfort is
achieved in the event of sudden heat energy demand. We recommend
installing TB1 at roughly 60-80 % of the buffer cylinder height, because
the volume above the sensor serves as a heat buffer.
When using an alternative heat source with control signal input,
connection of TB1 (switch-on and modulation sensor) and TB3 (switch-
off sensor) is absolutely essential. The sensor TB2 can be installed as an
option to obtain information on the fill level of the buffer cylinder and
does not affect the control.
Legend for Fig. 19 at end of document:
TB1 Upper buffer cylinder temperature sensor (switch-on and
modulation sensor of alternative heat source and blocking sensor
of conventional heat source)
TB2 Centrally positioned buffer cylinder temperature sensor
(information on fill level of buffer cylinder)
TB3 Buffer cylinder temperature sensor at bottom (switch-off sensor
of alternative heat source)
TW1 DHW temperature sensor of conventional heat source

DHW flow
1

Heat source flow
2

Heating flow
3

Heating return
4

DHW return
5

Heat source return
6
ME 200 – 6721841615 (2021/11)
3.3
▶ When observing the applicable regulations for the connection, at
least electrical cables of type H05 VV-.... must be used.
3.3.1
General BUS connection
If the maximum cable length of the BUS connection between all BUS
nodes is exceeded, or if the a ring structure exists in the BUS system, the
system cannot be commissioned.
Maximum total length of BUS connections:
• 100 m with 0.50 mm
• 300 m with 1.50 mm
BUS connection between ME 200 – control unit – other modules
▶ If the conductor cross-sections vary, use a junction box to connect
the BUS nodes.
Temperature sensor
When extending the sensor leads, use the following conductor cross-
sections:
). Position the
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• Up to 20 m with 0.75 mm
• 20 m to 100 m with 1.50 mm
General information on the extra-low voltage side
▶ To avoid inductive interference: Make sure all low-voltage cables are
routed separately from supply voltage carrying cables (min.
clearance 100 mm).
▶ In the case of external inductive effects (e. g. from PV systems) use
shielded cable (e. g. LiYCY) and ground one end of the shield.
|Connect the shield to the building's earthing system, e.g. to a free
earth conductor terminal or water pipes, and not to the terminal for
earth leads in the module.
▶ Route cables through the grommets provided and connect them as
shown in the wiring diagrams.
3.3.2
The assignment of the electrical connection depends on which system is
installed. A suggested procedure for establishing the electrical
connection is described in Fig. 7 to 15 at the end of this document.
▶ Only use electric cables of the same quality.
▶ Make sure the power supply is connected to the correct phases.
A power supply via an earthed safety plug is not permissible.
▶ Connect only components and assemblies to the outputs as
described in these instructions. Do not connect any additional
controls that operate other system components.
The maximum power consumption of the connected components and
assemblies must not exceed the power output stated in the
specifications for the module.
▶ If the mains voltage is not supplied via the electronic system of the
heat source EN 60335-1: Install a standard all-pole isolator (in
accordance with EN 60335-1) on site to interrupt the mains voltage.
▶ Route cables through the grommets, connect them as shown in the
connection diagrams and secure them with the strain relief devices
included in the scope of delivery ( Fig. 8 to 15 at the end of this
document).

Electric connection

Establishing the BUS connection and temperature sensor
(extra-low voltage side)
2
conductor cross-section
2
conductor cross-section
2
to 1.50 mm
2
conductor cross-section
Connecting the power supply, pump and mixer
(mains voltage side 230 V)
Installation
2
conductor cross-section
33