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Heating/cooling operation
The circulation pump then only runs in cooling mode.
The factory setting for the speed of the circulation pump
is at the MAX position.
Cooling operation is activated when the mixing and re-
versing valves are open as illustrated in the figure.
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Shuntventil
During heating operation (default) the mixing and revers-
ing valves are closed as illustrated.
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Shuntventil
When cooling has been activated, heating operation is
blocked for 2 hours (at factory) to prevent self-oscillation
between cooling and heating. If necessary, the setting
can be changed in menu 1.9.5.
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