AIT HSDV 12.1M3, Operating Manual

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Subject to technical amendments without prior notice | 83059300iUK | ait-deutschland GmbH
2.4 Residual risks
Electric shock
Components in the device are energised with
life-threatening voltage. Before working on the unit:
► Disconnect the device from power supply.
► Protect the device against being switched back
on again.
Existing earthing connections within housings or on
mounting plates must not be altered. If this should nev-
ertheless 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.
2.5 Avoid damage to property
Improper action
Requirements for minimum scale and corrosion dam-
age in hot water heating systems:
● Proper planning, design and commissioning
● Closed system with regard to corrosion
● Integration of an adequately dimensioned pres-
sure maintaining device
● Use of demineralised heating water (VE water) or
water corresponding to the VDI 2035 norm
● 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 occur:
● Malfunctions and the failure of components, e.g.
pumps, valves
● Internal and external leaks, e.g. from heat ex-
changers
● Cross-section reduction and blockages in compo-
nents, e.g. heat exchanger, pipes, pumps
● Material fatigue
● Gas bubbles and gas cushion formation (cavita-
tion)
● Negative effect on heat transfer, e.g. formation of
coatings, deposits, and associated noises, e.g.
boiling noises, flow noises
► Note and follow the information in this operating
manual for all work on and with the device.
Unsuitable quality of the fill and make-up
water in the heating circuit
The efficiency of the system and the service life of the
heat generator and the heating components depend
decisively on the quality of the heating water.
When the system is filled with untreated drinking wa -
ter, calcium precipitates as scale. Lime scale deposits
form on the heat transfer surfaces of the heating. The
efficiency drops and energy costs rise. In extreme cas -
es, the heat exchangers will be damaged.
► Fill the system with deionised heating water
(VE water) or with water corresponding to the VDI
2035 norm only (low-salt operation of the system).
3 Operation and care
NOTE
The device is operated via the control panel
of the heating and heat pump controller
(

operating manual of the heating and
heat pump controller).
3.1 Energy and environmentally
conscious operation
The generally accepted requirements for energy con-
scious and environmentally conscious operation of a
heating system also apply to use of a heat pump. The
most important measures include:
● No unnecessarily high flow temperature
● No unnecessarily high domestic hot water tem-
perature (note and follow local regulations)
● Do not open windows with just a gap or tilt open
(continuous ventilation), but instead open wide for
a short time (shock ventilation)
● Always ensure that the controller settings are cor-
rect