Thermal Disinfection; Screen Settings - Tech Controllers ST-976 User Manual

4.3.9
Thermal disinfection
Thermal disinfection involves DHW and it may be activated only in Water tank priority mode, Parallel pumps
mode or Summer mode.
It involves raising the temperature of water in the DHW circuit to the minimum of 60 °C. Current regulations
require adjusting the DHW installation to enable thermal disinfection carried out in the temperature of at least
60°C (recommended temperature: 70°C). Piping, fittings and technological design of the DHW system need to
meet this requirement.
DHW disinfection aims to eradicate Legionella pneumophila – bacteria which lower the cell‐mediated
immunity. The bacteria often multiplies in hot water reservoirs (optimum temperature: 35°C), which often
happens in water tanks.
Once this function has been activated, the water boiler is heated until the pre‐set temperature reached. The
temperature is maintained for the whole disinfection time (e.g. 10 minutes). Next, the standard operation
mode is restored. Disinfection temperature needs to be reached within 60 minutes from its activation (default
setting) Otherwise, the function will be automatically deactivated.
Any changes concerning this function may be introduced only in service mode.
4.3.10
Screen settings
Screen view
The user may change the main screen view choosing between the panel screen which displays current
parameters of the controller operation and manufacturer's screen (intended for authorised person, secured
with a code) which offers more details.
Screen brightness
This function is used to adjust screen brightness within the range of 10 to 100%.
Screen blanking
This function is used to adjust blank screen brightness within the range of 0 do 50%.
Blanking time
This function is used to set the screen blanking time.
Screen view
Screen brightness
Screen blanking
Blanking time
Software update
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