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2.4 Residual risks
Electric shock
Components in the unit are live with life-threatening
voltage. Before working on the unit:
► Disconnect unit from power supply.
► Protect unit against being switched back on again.
► Residual voltage at the inverter. Wait for 90
seconds before opening the unit.
Existing earthing connections within housings or on
mounting plates must not be altered. If this should ne-
vertheless be necessary in the course of repair or as-
sembly work:
► Restore earthing connections to their original con-
dition after completion of the work.
Injuries caused by high temperatures
► Before working on the unit, let it cool down.
Injury due to flammable liquids and potentially
explosive atmospheres
Constituents of antifreeze mixtures, e.g. ethanol,
methanol, are highly flammable and form an explosive
atmosphere:
► Mix antifreeze in well-ventilated rooms.
► Note the hazardous substance markings and
comply with the relevant safety regulations.
Injuries and environmental damage due to
refrigerant
The unit contains refrigerant that is hazardous to
health and the environment. If (primary) refrigerant
leaks from the unit, there is a risk of an explosion:
1.
Switch off unit.
2.
Thoroughly ventilate installation room.
3.
Notify authorised customer service.
Safety labels
► Observe safety labels on and in the unit.
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.
Subject to technical amendments without prior notice | 83072000bUK | ait-deutschland GmbH
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
Decommissioning/draining the heating
If the system/heat pump is decommissioned or drained
after already being filled, it must be ensured that
the condenser and any heat exchangers have been
drained completely for the event of freezing temper-
atures. Residual water in heat exchangers and con-
densers can result in damage to the components.
► Completely drain the system and the condenser,
and open vent valves.
► Blow them clear with compressed air, if required.
Improper action
Requirements for minimum scale and corrosion
damage in hot water heating systems:
●
Proper planning, design and start-up
●
Closed system with regard to corrosion
●
Integration of adequately dimensioned pressure
retention
●
Use of deionised heating water (VE water) or with
water corresponding to VDI 2035 only
●
Regular servicing and maintenance
If a system is not planned, designed, started up and
operated according to the given requirements, there is
a risk that the following damage and faults will o ccur:
●
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
components, e.g. heat exchanger, pipes, pumps
●
Material fatigue
●
Gas
bubbles
and
(cavitation)
gas
cushion
formation
5
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