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Bosch MC 400 Manual

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14 | Mounting
MC 4006 720 816 739 (2015/05)
2.6 Additional accessories
For detailed information about suitable accessories, please refer to the
catalogue.
• User interface: weather-compensated controller with outside
temperature sensor or room temperature-dependent controller;
connect to BUS (do not connect to BUS1, BUS2, BUS3 or BUS4);
connect outside temperature sensor to T1
• Flow temperature sensor; connect to T0
• Outside temperature sensor; connect to T1
• Return temperature sensor; connect to T2
• Cascade pump; connect to PC0
• Heating pump; connect to PC1
• Switch for max. output; connect to I2
• Stop switch; connect to I3
• IGM for heat source without EMS, EMS 2 or EMS plus; connect in
accordance with the technical documentation for the IGM (the
MC400 cascade module replaces the ICM)
Installation of additional accessories
▶ Install the additional accessories in accordance with legal
requirements and the instructions supplied.
2.7 Cleaning
▶ If required, wipe the enclosure with a damp cloth. Never use
aggressive or acidic cleaning agents for this.
3Mounting
3.1 Installation
▶ Install the module on a wall, ( Fig. 6 to Fig. 8, starting at page 82),
on a mounting rail ( Fig. 9, page 82) or in an assembly.
▶ When removing the module from the mounting rail, refer to Fig. 10 on
page 83.
3.2 Electrical connection
▶ Observe current regulations applicable to power connections, and
use at least cable type H05 VV-…
3.2.1 Connecting the BUS connection and temperature sensor
(extra-low voltage side)
General BUS connection
Maximum total length of BUS connections:
• 100 m at 0.50 mm
2
conductor cross-section
• 300 m at 1.50 mm
2
conductor cross-section
BUS connection between the heat source – and cascade module
▶
Connect the heat sources and lower-level cascade modules directly to
terminals
BUS1 ...BUS4
(
overview of the terminal assignment).
BUS connection between the cascade module – user interface –
other modules
▶ If the conductor cross-sections are different, use the junction box to
connect the BUS nodes.
▶ BUS user [B] via junction box [A] in a star ( Fig. 19, page 84, note
the instructions for the user interface and other modules).
Temperature sensor
When sensor leads are extended, apply the following lead cross-sections:
• up to 20 m with 0.75 mm
2
to 1.50 mm
2
conductor cross-section
• 20 m up to 100 m with 1.50 mm
2
conductor cross-section
Maximum output per connection
•PC0, PC1
•A0, IA1
• 400 W (high-efficiency pumps
permitted; max. 40 A/s)
•10W
Capturing range for the flow and
return temperature sensor
• Lower fault limit
• Display range
• Upper fault limit
• < – 10 °C
• 0 ... 100 °C
• > 125 °C
Capturing range, outside
temperature sensor
• Lower fault limit
• Display range
• Upper fault limit
• < – 35 °C
• – 30 ... 50 °C
• > 125 °C
Permitted ambient temp. 0 ... 60 °C
IP rating IP44
Protection class I
ID no. Data plate ( Fig. 22, page 85)
Specifications
Table 3
DANGER: Risk of electric shock!
▶ Before installing this product: completely disconnect
heat appliances and all other BUS nodes from the mains
voltage.
▶ Before commissioning: fit the cover ( Fig. 21,
page 85).
If the maximum cable length of the BUS connection between
all BUS nodes is exceeded, or if the BUS system is realised
as a ring structure, the system cannot be commissioned.
… 14 …


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