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3
Installation
DANGER
Danger to life from electric shock!
Touching live electrical parts can cause 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 the cover ( Fig. 17 at end
of document).
3.1
Preparation for the installation in the heat
source
▶ Check by referring to the installation instructions of the
heat source whether it is possible to install modules
(e.g. MS 100) in the heat source.
▶ If the module can be installed in the heat generator without
a mounting rail, prepare the module ( Figs 5 and 6 at the
end of the document).
3.2
Installation
▶ Install the module on a wall ( Figs. 7 and 8), on a
mounting rail ( Fig. 9), in an assembly or in the heat
generator as shown at the end of the document.
▶ When the module is installed in a heat source, observe the
heat source instructions.
▶ Remove the module from the mounting rail ( Fig. 10 at
end of document).
3.3
Electric 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)
▶ If the conductor cross-sections vary, use a junction box to
connect the BUS nodes.
▶ Connect the BUS participants [B] as shown at the end of
the document via electrical distribution box [A] in star
( Fig. 15) or in series via BUS participants with 2 BUS
connections.
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.
MS 100 – 6721830547 (2020/12)
Maximum total length of BUS connections:
2
•
100 m with 0.50 mm
2
•
300 m with 1.50 mm
▶ 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 connecting terminal for earth
leads in the module.
When extending the sensor leads, use the following conductor
cross-sections:
•
Up to 20 m: 0.75 mm
section
•
20 m to 100 m: 1.50 mm
▶ Route cables through the grommets provided and connect
them as shown in the connection diagrams.
3.3.2 Connecting the power supply, pump and mixer
(mains voltage side)
The assignment of the electrical connection depends on which
system is installed. The description at the end of the document
in Figs. 11 to 14 is a suggestion for the electrical power
connection procedure. Not all steps are shown in black. This
makes it easier to see, which steps belong together.
▶ 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.
▶ 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. 11 to 14 at the end of this document).
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: Install a standard all-pole isolator (in
accordance with EN 60335-1) on site to interrupt the
mains voltage.
Installation
conductor cross-section
conductor cross-section
2
2
up to 1.50 mm
conductor cross-
2
conductor cross-section
31
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