4
If the controller has been switched into regular operation mode, you can access the main controller MENU by pressing the key. Navigation keys or serve the
purpose of selecting some options. Then you can enter the selected option by pressing the key.
In order to edit controller parameters use navigation keys or to select a given parameter and press to confirm parameter editing (the values will flash). Then use
navigation keys or to change the required value and press in order to accept it. By pressing you will return to the previous screen.
ATTENTION ! The operation scheme presented applies for almost all the controller options. After any changes of the scheme or parameters in the controller,
it is recommended to switch it off and then on again with ON/OFF button.
4. Installation schemes (scheme selection)
This option makes it possible to select an appropriate installation scheme necessary for correct operation of the controller. In order to select an installation scheme:
Press the following key combination: starting point - MAIN SCREEN: enter into the MENU , Select scheme , Select an appropriate scheme or , confirm (a
continuous sound signal), return to the main screen .
ATTENTION ! Broken lines in all the installation schemes refer to temperature sensors which can be connected to the controller, but are not required for its proper
operation for the selected scheme. Connection of titanium anode is marked on the diagrams (applies to the GH26-P09A controller only)
4.1 Tap water heating system - controlling solar collector pump – scheme no 1
Controlling the P collector pump - Regulation of collectors’ pump – scheme no 1
The P collector pump will be switched on if the T1 solar collector gets hotter by the “Temp. T1&T2 difference - pump ON” value than the T2 temperature in the lower part of the
heater. If the heater’s temperature reaches the set value of “MaxTemp. T2 OFF collector’s pump”, the P pump will be switched off. Additionally, in order to avoid unstable pump
operation when the temperature on the sensor changes, switch on and switch off hysteresis has been used.
Controlling the P collector pump - Regulation of collector’s pump - YES
Applies to the electronic pumps controlled with PWM signal only. When a normal circulation pump is connected, the pump will operate on an on/off basis although the
control is enabled.
The P collector pump will be switched on and off in the case described above but the collector changes the rotational speed of the P collector pump depending on the difference in temperature (T1-
T2) and the set parameter “Temp. T1&T2 difference - pump ON”. This option makes it possible to effectively collect energy from the collectors with variable solar radiation.
Fig. 3. Schematic and electrical diagram of installation no 1.
4.2 Tap water heating system - controlling solar collector pump and a circulation pump - scheme no 2
Controlling the P collector pump
Similarly as in scheme no 1 - description in point 4.1.
Controlling the C circulation pump
The C circulation pump is only switched on in the time programmed by the user in the “Time program C” setting. The C pump can work in two modes set by the user, that is, continuous or
discontinuous (“Time of switching on the circulating pump” and “Time of switching off the circulating pump”) in the “Circulation param.” setting.
Moreover, C pump operation is limited by T4 temperature in the upper part of the heater; if the T4 temperature is lower than the set value of “Min. temp. T4 switching on the circulation pump” in
the “Circulation param.” setting. C circulating pump operation mode can be selected in the “Parameter settings” menu.
Fig. 4. Schematic and electrical diagram of installation no 2.
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