Inverted
In the case of the pump control system with an inverted PWM signal, the nominal speed of
the pump (0–100 %) corresponds to the PWM signal (100-0 %). The following diagram
shows the power curve for the pump control system with an inverted PWM signal at a
minimum pump output of 30 %.
PWM (%) – inverted PWM signal
n (%) – pump speed sent by the controller
7.3 Setting the "Tube collector" functions
If the solar power system is equipped with tube collectors, you have to activate this function.
The control type is selected in the "Basic settings" menu with the following value:
• P:10: "Tube collector" function
− Time-controlled
Time-controlled
You can set a time window and a pump runtime. In the time window the solar circuit
pump is switched on at certain specific intervals for the duration of the preset pump
runtime.
The "Basic settings" menu allows you to set the following parameters:
• P:11: "Tube collector" function: Pump runtime.
The "Program" menu allows you to set the following parameters:
• Time window 4: Start for the "Tube collector" and "Drain-back" functions
• Time window 4: Stop for the "Tube collector" and "Drain-back" functions
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