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System description Note: T3 is alternative sensor, when no sensor (T3) is installed in the top part of tank, controller will use the signal of sensor T2 automatically to control the auxiliary heating or the circulation pump. 1 collector array – 1 storage tank – 1 pump and auxiliary heating Description: The solar circuit pump (P1) is switched on as soon as the switch-on temperature difference (delt Ton) between the collector array (T1) and the storage tank (T2) is reached. If the temperature difference between the collector array (T1) and storage tank (T2) drops below the switch-off temperature difference (delt Toff), or the temperature of storage tank (T3) reaches the preset maximum storage temperature, then the solar circuit pump ( P1) is switched off. Back-up heating by auxiliary boiler (detailed see paragraph 4.3): Within the preset time section of back-up heating, if the temperature T3 is below the switch-on temperature, then the circulation pump ( H1) of back-up heating is triggered, when T3 is heated to the switch-off temperature, circulation pump H1 of back-up heating is ceased.
4.3 Main menu DT O & DT F Temperature difference function4.4 Main menu - THET timing heating4.5 TEMP Temperature main menu4.5.1 EM Emergency collector temperature(Emergency switch-off temperature of collector)4.5.2 CMX Maximum limited collector temperature (collector cooling function)4.5.3 CMN low temperature protection of collector4.5.4 CFR frost protection of collector4.5.5 SMX Maximum temperature of tank4.5.6 REC Tank re-cooling function4.5.7 C- F Celsius and Fahrenheit temperature transferring4.6 HND Manual mode4.7 PASS Password setting4.8 LOAD Recovery factory setting4.9 Manual heating4.10 Holiday function4.11 Temperature query function5. Protection function5.1. Memory protection5.2 Screen protection6. Trouble shooting6.1 Trouble protection6.2 Trouble checking