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EXPERT MENU (FOR QUALIFIED TECHNICIANS ONLY)
9.5.22 Valve DWU3 operating mode
Menu: Expert menu > Settings > C: Prio./sec.prio > DWU3 valve operating mode
In Auto mode, the valve allows fluid to flow from I to II when the conditions for doing so are met.
If the option On is selected, the valve allows fluid to flow from I to II.
If the option Off is selected, the valve allows fluid to flow from I to III.
Setting range
On, Off, Auto
9.5.23 Pump PD speed control
Menu: Expert menu > Settings > D: Ext. heat exchanger > PD pump speed control
WARNING: risk of damage to system due to pump failure.
B If a pump with internal electronic circuitry is connected, deactivate the speed control
function on the programmer.
The speed control function improves the efficiency of the solar heating system by keeping the
temperature difference within the set cut-in temperature differential.
Setting range
Off, On
9.5.24 Pump PD modulation
Menu: Expert menu > Settings > D: Ext. heat exchanger > PD pump modulation
This setting determines the minimum speed of the pump for the 2nd collector array.
The minimum pump speed of pumps SP and PD is always the same for the configurations 1-D or 1-BD.
If the setting for one of the pumps is changed, the programmer automatically alters the other to match.
Setting range
30 - 100 %
70
Default setting
Auto
Default setting
on
Default setting
50 %
New setting
New setting
New setting
6 720 644 593 (2010/04)
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