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Summary of Contents for Hewalex G-422-P09
- Page 1 USER MANUAL OF AN INDEPENDENT REGULATION BLOCK G-422-P09 G-422-P09A Controller of a solar collector system applicable from version 0.1a...
- Page 2 Controller description The G422 controller is a device designed and made for controlling solar collector systems. The product has been made with the use of modern and reliable microprocessor technology. Design of the controller is modern and the controller itself is very user-friendly thanks to the use of a user panel with a clear keyboard and an LCD display.
- Page 3 Switching on and using the controller 3.1 First switch on of the controller Upon connecting the controller to a power source it will be switched on in the stand-by mode and a diode will get lit. In this mode the LCD display gets slightly back-lit and the current controller software version appears on the screen.
- Page 4 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.
- Page 5 Sample R1 resistor [kΩ] R2 resistor [kΩ] Sample R1 resistor [kΩ] R2 resistor [kΩ] Temp. 20 30°C Temp. 70 80C Temp. 20 30°C Temp. 70 80C boiler manufacturer boiler manufacturer 12,0 15,0 1,5 2,0 8,0 ...
- Page 6 Fig. 7. Schematic and electrical diagram of installation no 5. 4.6 Tap water heating system - controlling solar collector pump, circulation pump, a fireplace pump or a solid-fuel boiler pump – scheme no 6 Controlling the P collector pump Similarly as in scheme no 1 - description in point 4.1. Controlling the C circulation pump Similarly as in scheme no 2 - description in point 4.2.
- Page 7 Controlling the U three-way valve. The three-way valve will be switched into the A heater direction if the T2 temperature at the collector heater gets higher by the “Temperature difference ON add. pump, valve” value than the T4 temperature in the circulation return. The valve will switch into the direction of A heater if the difference in temperatures (T2-T4) falls below the set value. Else, circulation return will always be directed to the B boiler heater.
- Page 8 Selecting priority B will result in the operation as described in the scheme 9 – see point 4.9. Controlling pool pump Similarly as in scheme no 9 - description in point 4.9. Fig. 12. Schematic and electrical diagram of installation no 10. 4.11 Double heater system with the use of a three-way valve, controlling operation of the circulation pump - scheme no 11 Controlling collector pump and U three-way valve Similarly as in scheme no 9 - description in point 4.9.
- Page 9 Fig. 15. Schematic and electrical diagram of installation no 13. 4.14 System for heating a combi heater with solar collector, an electrical boiler or liquid-fuel boiler and a solid-fuel boiler - scheme no 14 Controlling the P collector pump Similarly as in scheme no 1 - description in point 4.1. Controlling the K boiler Similarly as in scheme no 3 - description in point 4.3.
- Page 10 Fig. 17. Schematic and electrical diagram of installation no 15. 4.16 Double-heater system using a three-way valve - controlling operation of solar collector pumps located in various directions - scheme no 16 Controlling P and K collector pumps and the U three-way valve – selected priority: B > A. Solar heating of B heater is analogical as in scheme no 15, and described in point 4.15.
- Page 11 4.18 Tap water heating system – controlling solar collector pump, solar energy heating for the boiler heater with the use of a pump and controlling the operation of fireplace or solid-fuel boiler pump – scheme no 18 Controlling the P collector pump Similarly as in scheme no 1 –...
- Page 12 ATTENTION ! Time intervals are divided into 24h operation periods, settings for each hour are selected separately by marking it with a white square. The number of squares marks the number of operation hours. Week days have been divided into three groups: Monday - Friday (Mo-Fr), Saturday (Sat), Sunday (Sun). 5.3 Circulation parameters This option allows for setting all parameters connected with the operation of the tap water circulation pump.
- Page 13 Pump efficiency Minimum Nominal Flow [l/min] Fig. 22. Graphical representation of flow settings. ATTENTION ! If after entering the minimum flow rate option, there is no flow shown by rotameter float, it is recommended to increase the speed of the pump. Nominal and minimum flow rate settings are only relevant when P collector pump adjustment is switched on.
- Page 14 6.4 Language This option allows you to choose one of the available language versions for the controller. In order to change language: Press the following key combination: starting point - MAIN SCREEN: enter the MENU with , get to the option named Controller settings with , enter the Controller settings menu with , get to the option named Language with...
- Page 15 10. Vacation function Vacation function switches on the option of night cooling and collector overheating protection. Additionally, this option allows disabling additional heating devices connected to the controller in the active time period declared by the user – applies to scheme no. 3, 4, 5, 14. Active vacation option is indicated by the display of the screen HOLIDAY alternating with the scheme on the main screen of the controller.
- Page 16 This parameter determines the time delay when changing to a higher rotation of solar panel pump. Min. time before pump Additionally, the parameter causes smooth operation of the solar installation with variable weather conditions and affects the 10 – 300s 150s speed level increases efficient use of solar energy especially on cloudy days.
- Page 17 The controller is equipped with a pressure control of the heat transfer fluid (the function Pressure switch enabled – see Control parameters). The pressure drop below 1.5 bar for 30 minutes is indicated by the following message: LACK OF REQUIRED PRESSURE. By pressing the key for acceptance the user will return to the main screen of the controller.
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