Bosch ME 200, Installation Instructions For Contractors

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Installation
27
ME 200 – 6720884576 (2019/08)
Table 37
2.7 Additional accessories
For detailed information about suitable accessories, refer to the
catalogue or Internet page of the manufacturer.
• Control unitC 400/C 800: weather-compensated control unit with
outside temperature sensor; connected to BUS; connected to
outside temperature sensor preferably at the conventional heat
source, only to connection T1 when using stand-alone alternative
heat source.
• Flow and return temperature sensor; connected to TA1, TB4 and
TR1, TR2
• Flue gas temperature sensor; connection TF1
• Pump return; connected to PR1
• Cylinder temperature sensor; connected to TB1, TB2, TB3
Installation of additional accessories
▶ Install the additional accessories in accordance with legal regulations
and the instructions supplied.
2.8 Cleaning
▶ If required, wipe the enclosure with a damp cloth. Never use
aggressive or acidic cleaning agents for this.
3 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. 18 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 (

3
) and heating return (

4
). Position the
DHW temperature sensor TW1 high up so it cannot be affected by the
return (

4
,

5
). Fig. 20 at the end of the document shows the B...-6 type
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. 20 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

1
DHW flow

2
Heat source flow

3
Heating flow

4
Heating return

5
DHW return

6
Heat source return
3.3 electrical connection
▶ Observe electrical regulations and use at least cable H05 VV-...
3.3.1 Establishing the BUS connection and temperature sensor
(extra-low voltage side)
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
2
conductor cross-section
• 300 m with 1.50 mm
2
conductor cross-section
BUS connection between ME 200 – control unit – other modules
▶ If the conductor cross-sections vary, use a junction box to connect
the BUS nodes.
▶ BUS node [B] via junction box [A] in a star (

Fig. 16 at end of
document, observe instructions for the control unit and other modules).
Temperature sensor
When extending the sensor leads, use the following conductor cross-
sections:
• 0.75 mm
2
to 1.50 mm
2
conductor cross-section for up to 20 m
• 1.50 mm
2
conductor cross-section for 20 m to 100 m
General information on the extra-low voltage side
Measuring range of flue gas
temperature sensor TF1 0 ... 300 °C
Permitted ambient temperature 0 ... 60 °C
IP rating IP 44
Protection class I
ID no. Data plate (

Fig. 19 at the end of
document)
Temperature of ball thrust test 75 °C
Degree of pollution 2
Specification
Terminal designations (extra-low voltage side ≤ 24 V)
BUS
1)2)
Connection to controller, modules, heat sources, if conventional
heat sources are operated in the system alongside alternative
heat sources (coding switch position 1)
BUS
2)
addr. 9-10
Connection to controllers, modules, if stand-alone alternative
heat source is operated in the heating system (coding switch
position 10)