Main functions
1. 1Clock/week display
2. Chosen system (8 systems available)
3. Temperature difference on/off
4. Maximum tank temperature (protection of tank at high temperature)
5. Maximum collector temperature (collector cooling function)
6. Collector emergency cut-off
7. Limitation operation of collector at low temperature
8. Frost protection
9. Temperature controlled hot water circulation pump
10. Time controlled hot water circulation pump
11. Temperature controlled auxiliary heating during three time section
12. Holiday function
13. Auto function
14. Auxiliary function[a Temperature difference controlling <T2>, b. Heating return increase, c. High temperature by-pass]
15. Protection functions ( a. Memory protection, b. anti-bacteria protection, c. anti-dry heating protection)