Installation In The Reference Room; Electrical Connection - Bosch CR 400 Installation Instructions For Contractors

10 | Installation
3.3

Installation in the reference room

The installation surface on the wall must be
flat.
When installing on a wall box:
▶ Fill the wall box with thermal insulation
material to prevent falsification of the
room temperature measurement by
drafts.
▶ Install plinth on a wall (
6 mm 6 mm 3,5 mm
3,5 mm
Fig. 5 Installation of plinth
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3.4
Power is supplied to the user interface via the BUS cable.
The leads may be connected to either pole.
Fig. 5).
Maximum total length of BUS connections:
•
•
▶ If several BUS nodes are installed, maintain a minimum
▶ If several BUS nodes are installed, connect the BUS nodes
▶ To avoid inductive interference: make sure all low-voltage
▶ In the case of external inductive interferences (e.g. from
▶ Establish a BUS connection to the heat source. Depending
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Fig. 6

Electrical connection

If the maximum total length of the BUS
connections between all BUS nodes is
exceeded or the BUS system has a ring
structure, commissioning of the system is not
possible.
2
100 m with 0.50 mm conductor cross-section
2
300 m with 1.50 mm conductor cross-section.
clearance of 100 mm between the individual BUS nodes.
in series or in a star pattern.
cables are routed separately to mains voltage cables (min.
clearance 100 mm).
photovoltaic systems), use shielded cables (e.g. LIYCY)
and earth the shield on one side. The shield should be
connected to the building's earthing system, e.g. to a free
earth conductor terminal or water pipes, and not to the
earth lead terminal in the module.
on the installed heat source the terminal designation is
different there.
BUS
Connection of the user interface to a heat source
BUS/
EMS/BB
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CR 400 | CW 400 | CW 800