Injuries and environmental damage due to
refrigerant
The unit contains harmful and environmentally danger-
ousrefrigerant.Ifrefrigerantleaksfromtheunit:
1. Switch off unit.
2. Thoroughly ventilate installation room.
3. Notify authorised customer service.
2.5 Disposal
Batteries
Improper disposal of the buffer battery damages the
environment.
► Dispose of the buffer battery in an environmentally
compatible way according to the local regulations.
Media harmful to the environment
Improper disposal of environmentally harmful media
(antifreeze, refrigerant) damages the environment:
► Collect media safely.
► Dispose of the media in an environmentally com-
patible way according to the local regulations.
2.6 Avoid damage to property
Improper action
Requirements for minimum scale and corrosion dam-
age in hot water heating systems:
● Proper planning, design and start-up
● Closed system with regard to corrosion
● Integration of adequately dimensioned pressure
generation
● Use of deionised heating water (VE water) or VDI
2035 water
● Regular servicing and maintenance
If a system is not planned, designed, started up and
operated according to the named requirements, there
isariskthatthefollowingdamageandfaultswilloccur:
● Malfunctions and the failure of components, e.g.
pumps, valves
● Internal and external leaks, e.g. from heat
exchangers
● Cross-section reduction and blockages in compo-
nents, e.g. heat exchanger, pipes, pumps
● Material fatigue
● Gas bubbles and gas cushion formation
(cavitation)
● Negative effect on heat transfer, e.g. formation of
coatings, deposits, and associated noises, e.g.
boiling noises, ow noises
► Note and follow the information in this operating
manualforallworkonandwiththeunit.
Unsuitablequalityofthellandmake-up
water in the heating circuit
The efciency of the system and the life of the heat
generator and the heating components depend deci-
sively on the quality of the heating water.
If the system is lled with untreated domestic water,
calcium precipitates as scale. Limescale deposits form
ontheheattransfersurfacesoftheheating.Theef-
ciency drops and energy costs rise. In extreme cases
the heat exchangers are damaged.
► Fill system with deionised heating water (VE
water) or VDI 2035 water only.
Unsuitable quality of the water in the domes-
tichotwatertank
► Ensure that the electrical conductivity of the
domesticwaterisatleast100μS/cm.
Unsuitable quality of the water or the
water-antifreeze mixture in the heat source
► Use of pure water in a at-plate collector or a borehole
heat exchanger (vertical collector) is not permitted
► For operation of the heat source with water-
antifreeze mixture, ensure that the water fulls the
quality specications of the heating water side
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