Terminology - Viessmann PLC VITOCAL 350-HT PRO Operating Instructions For The System User

Appendix

Terminology

Raised set value DHW temp.
■ Increasing the temperature of the domestic hot water
is done to kill off unwanted bacteria (i.e. legionella) in
the water. The function increases energy consump-
tion.
■ The DHW needs to be mixed differently at the draw-
off point in order to maintain the same temperature.
The function is activated at night to take advantage
of any low electricity tariffs and because there is less
demand for DHW at this time of day.
■ The function should be activated once a week.
HWBC
Heating water buffer cylinder
DHW
Domestic hot water
HP
Heat pump
Res. heat
Residual heat
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