Service level menu (for qualified heating engineers only)
Logamatic SC40 - Technical specifications are subject to change without prior notice.
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7.5.17
Solar system pump 2 speed modulation/Plate heat exchanger
Menu: Service > Settings > Solar system pump 2 speed modulation/Plate heat
exchanger
The speed modulation function improves the efficiency of the solar thermal system by keeping the
temperature difference between the relevant sensors within the set cut-in temperature differential.
If the “Double match flow” function is active, the pump speed is controlled by that function. We rec-
ommend leaving this setting activated.
7.5.18
Solar system pump 2 minimum output/Plate heat exchanger
Menu: Service > Settings > Solar system pump 2 minimum output
This setting determines the minimum speed of solar system pump 2.
In systems with external heat exchanger and 2 heat consumers or systems with external heat
exchanger and East/West aspect function, the pump is run at 100 %.
The minimum pump output for solar system pumps 1 and 2 is always the same with configurations
T3, T7 and H3 (if the minimum output for one pump is changed, the controller sets the others to the
same output).
Warning:
risk of damage to system due to pump failure.
V
Connect pump to output R2.
V
If a pump with internal electronic control circuitry is connected, deactivate the
speed modulation function on the controller.
Setting range
Default setting
New setting
Yes/No
Yes
Tab. 30
Setting range
Default setting
New setting
30 - 100 %
50 %
Tab. 31