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EXPERT MENU (FOR QUALIFIED TECHNICIANS ONLY)
9.5.27 Pump PD operating mode
Menu: Expert menu > Settings > D: Ext. heat exchanger > PD pump operating mode
In Auto mode, the connected pump runs whenever the conditions for switching on are met.
Selecting the option On switches the pump on.
Selecting the option Off deactivates the pump.
Setting range
Auto, On, Off
9.5.28 Anti-icing valve operating mode
Menu: Expert menu > Settings > 2: Back-up htg. > Anti-icing valve operating mode
In Auto mode, the valve directs the flow to bypass the heat exchanger whenever the conditions for
doing so are met.
If the option On is selected, the valve diverts the flow to bypass the heat exchanger.
If the option Off is selected, the valve directs the flow through the heat exchanger.
Setting range
On, Off, Auto
9.5.29 Thermal disinfection
Menu: Expert menu > Settings > E: Therm. disinfection
Thermal disinfection is a preventive measure to ensure domestic hot water hygiene.
If the required temperature has not been reached by the heat from the solar system over the past 24
hours, the water in the cylinder is circulated by a pump. This ensures that the entire contents of the
cylinder are heated up by the supplementary heating system.
Afterwards, the pump for the heat exchanger (if present) starts up so as to include that circulation
system as well.
WARNING: health risk if thermal disinfection function is impaired.
B Check the thermal disinfection function manually with the aid of a thermometer when
commissioning the system.
Ensure the following criteria are met in order to guarantee that thermal disinfection functions:
The heat output for thermal disinfection must not be greater than the maximum heat output of the
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conventional supplementary heating system for the standby cylinder.
The piping for the thermal disinfection system should be better thermally insulated than standard.
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Default setting
Auto
Default setting
Auto
New setting
New setting
6 720 644 593 (2010/04)
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