HDG Turbotec 50 L, Руководство по эксплуатации

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4 Planning and installation – Electrical system
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4.8 Electrical system
The electrical connections should be made in accordance with VDE
guideline 0100, “Electrical systems in buildings”.
The technical details are described in chapter “3 Mode of
operation”, section “3.3 Technical data”.
The description of the plug board is found in chapter
“11 Appendix”.
4.9 Water
The heating system must be filled with water in accordance with VDI
guideline 2035, “Avoiding damage in hot water heating systems”.
Before putting the system into operation, the pressure of the
membrane expansion container must be adjusted for the conditions
in the heating system and in the building.
After putting the system into operation, heat up the system to the
maximum boiler temperature and bleed air from the system again to
make sure that there are no air pockets.
4.10 Connecting the thermal safety device
In accordance with DIN EN 12828, heating systems must be
equipped with safety devices to prevent the maximum operating
temperature from being exceeded. The safety heat exchanger serves
to protect the boiler against overheating and may
not be used for
other purposes (i.e. utilised as a normal heat exchanger). If the heat
intake capacity is suddenly lost (e.g. the circulation pump for raising
return temperature fails), heat production cannot be stopped as
quickly as with an oil or gas boiler. When the maximum operating
temperature is exceeded, the thermal safety device (TAS for short) is
triggered and cold water flows through the safety heat exchanger.
The resulting excess energy is thus dissipated by the “emergency
cooling”. (Alternative to fast regulation.)
However, the safety heat exchanger and thermal safety device can
only serve their purpose if the following requirements have been
met:
• Flow pressure of at least two bar must be available at the cold
water inlet of the safety heat exchanger.
• Water must be able to flow freely through the system.
Mains-dependent, stand-alone supply systems are not a viable
alternative.