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HIU2-IM-DE-W-UK-04-2021-Rev7 | Part no. 10078860 3
EN
ENGLISH
2 Safety
2.1 Depiction of safety information
DANGER indicates an imminent danger
that may cause serious physical injury or
death if the appropriate safety precau-
tions are not in place.
WARNING indicates a danger arising
through incorrect behavior (e.g. misuse,
disregarding notices, etc.) that may cause
serious physical injury or death.
CAUTION indicates a potentially danger-
ous situation that may cause minor or
slight injuries if the appropriate safety
precautions are not in place.
NOTICE indicates a situation that may
cause material damage if the correspond-
ing precautions are not taken.
2.2 Important safety information
Before using the device, read this operating manual
through carefully.
Only connect the HIU 2 to a power source that corre-
sponds to the mains voltage specified on the rating plate of
the HIU2.
The power supply to the HIU2 must be disconnected prior
to maintenance, cleaning and repair work.
Maintenance, cleaning and repair work may be carried out
by trained specialist personnel only.
The HIU2 must not be used if it is damaged or if the HIU2
is no longer operating correctly. In this case, contact your
specialist dealer immediately.
Observe the maintenance instructions and intervals.
Protect the HIU2 from the influences of weather.
Never use the HIU2 outdoors.
The unit may be used only in accordance with its intend-
ed use.
2.3 Intended use
Ready-to-install compact, decentralized heat interface unit for
hygienic domestic hot water generation and heat distribution
in single-family houses and townhouse systems as well as for
use in multi-story apartment blocks.
The HIU2 is not intended to be operated by people (includ-
ing children) with physical, sensory or mental disabilities, nor
by people with insufficient experience or previous knowledge.
2.4 Foreseeable misuse
The following is considered to be foreseeable misuse:
Operating the HIU 2 contrary to the specifications
Improper use of the HIU2
Modifications to the HIU2 that were not agreed with the
manufacturer
Use of replacement or wear parts that were not approved
by the manufacturer
Operating the HIU2 outdoors (parts and components are
not UV resistant)
Use of prohibited media
2.5 Responsibilities of the operator
The operator must ensure that:
the HIU2 is only used for its intended purpose
the HIU2 is installed, operated and maintained accord-
ing to the specifications in the Installation and Operating
Manual
the HIU2 is only operated according to local regulations
and occupational health and safety regulations
all precautionary measures have been carried out to avoid
dangers originating from the HIU2
all precautions for first aid and fire suppression are carried
out
only authorized and trained users have access to the HIU2
and operate it
users have access to this installation and operating manual
at all times
2.6 Personnel groups
Only qualified persons may install and operate the HIU 2 or
perform maintenance work.
Operator
An operator is deemed to be qualified if they have read these
operating instructions and understood the potential hazards
associated with improper behavior.
Fitter/commissioning engineer
A plumber or commissioning engineer is in a position, taking
into consideration the applicable standards, provisions, regu-
lations and laws and his/her technical training and technical
knowledge, to carry out work on the HIU 2 and to detect and
prevent potential hazards.
2.7 Information on the operating environment
Limescale deposits (from hard water) and corrosion, as well
as chemical and physical reactions, can cause damage to the
home station.
The selection of material for the plate heat exchanger (copper
or stainless steel) must be checked with reference to the water
quality (corrosion resistance).
The system planner is responsible for evaluating these
parameters and taking appropriate precautions.
3


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