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6
Standards, regulations and directives
The following regulations and standards, among others, must be
observed during installation and operation:
• Regulations for electrical installation and connection to the electrical
grid (e.g. IEC/HD 60364) must be observed in the respective version
of the country.
• Pressure Equipment Directive – systems with boiler temperatures
> 110 °C
• Requirements on the equipment of shell boilers
• Heating system in buildings
• Water quality operator's log for heat sources
• National regulations for protection of potable water.
• Manufacturer's technical Codes of Practice (e.g. in the catalogue)
• National standards and regulations
• National standards that are based on European standards (EN) in the
corresponding version of the specific country must be observed.
7
Installation
7.1
Assembly
Preferably mount the control unit to the wall.
NOTICE
The installation location must not be higher than 2000 m above sea level.
7.2
Connecting the heat source to the control unit
DANGER
Material damage and/or danger to life due to contact with electrical
components and moisture
When installing and connecting the control unit (the combination of heat
source and control unit), protection against contact with electrical
components and penetration of moisture must be ensured.
▶ Make sure that electrical components inside the control/heat source
cannot be touched.
▶ Make sure that solid bodies cannot penetrate the control/heat source.
▶ Make sure that ingress of moisture into components is prevented.
▶ Make sure that the conditions for IP20 protection are observed in
accordance with local regulations. Mounting the main controller on
the boiler via the adapter plate available, which is available as an
accessory, seals the openings on the underside of the control unit,
which ensures the conditions for the IP20 protection are observed in
accordance with local regulations.
7.2.1
Connection via the Modbus interface
The Modbus interface uses the Modbus RTU data protocol.
• It is not suitable for communication with building management
systems (BMS).
• Components that can also communicate via Modbus RTU
(e.g. CHP plant, VES bypass desalination) can be connected to the
Modbus RTU interface.
Use of the interface may require additional components.
For heat sources (e.g. combined heat and power unit) that are
connected via, the Modbus-RTU
( Figure 7, [3], page 10):
▶ Connect communication cable to the Modbus-RTU connection.
▶ Consider connection to the heat source.
Control 8310 – 6720856493 (2022/07)
To avoid stray voltages:
▶ Only connect cable shield to one control unit!
7.3
Electrical connection
WARNING
Risk to life and of system damage due to high temperatures.
All parts directly or indirectly exposed to high temperatures must be
designed to withstand these temperatures.
▶ Keep cables and electrical wiring at a safe distance from hot
components.
▶ Route cables and electrical wiring in the cable routings provided,
or above the insulation.
NOTICE
Faults/material damage due to inductive interference!
▶ Make sure all low-voltage cables are routed separately to mains
voltage cables (min. clearance: 100 mm).
NOTICE
Material damage as a result of disregarding other instructions!
If other instructions for components are disregarded, the heating system
may develop faults or be damaged due to incorrect connections/settings.
▶ Follow the directions in all instructions for the components that are to
be installed.
Note the following when making electrical connections:
• Before opening the control unit, disconnect it from all poles of the
power supply and secure against unintentional reconnection.
• All electrical connections, safety measures and safeguards must only
be performed by approved experts, taking into account the relevant
standards, guidelines and local regulations.
• Establish permanent electrical connection in accordance with local/
national regulations.
• When installing the devices, make sure that there is an earth connection.
• Do not exceed the total current stated on the data plate, and the
partial currents for each safety switch and connection.
• Incorrect attempts to make connections when live may destroy the
control unit and lead to dangerous electric shocks.
▶ Establish electrical connections as specified in the connection
diagram of the control unit, modules and the local conditions.
Standards, regulations and directives
9
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Troubleshooting
