1 collector array – 1 storage tank – 1 pump and auxiliary heating Description: The solar circuit pump (R1) is switched on as soon as the switch-on temperature difference (△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 (△Toff), or the temperature of storage tank (T3) reaches the preset maximum storage temperature, then the solar circuit pump ( R1) 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.


Main functions
1.Main  menu  DT  O  &  DT  F  Temperature  difference  function
2.Main  menu-THET  timing  heating
3.TEMP  Temperature  main  menu
4.EM  Emergency  collector  temperature
(emergency  switch-off  temperature  of  collector)
5.CMX  Maximum  limited  collector  temperature  (collector  cooling  function)
6.CMN  low  temperature  protection  of  collector
7.CFR  frost  protection  of  collector
8.SMX  Maximum  temperature  of  tank
9.REC  Tank  re-cooling  function
10.Celsius  and  Fahrenheit  temperature  transferring
11.FUN  Auxiliary  function
12.DVWG  Anti-Legionella  function
13.CIRC  Temperature  controlled  hot  water  circulation  pump
14.nMIN  Solar  circulation  pump  speed  adjusting  (RPM  speed  controlling)(Only  available  on  SR868C8Q)
15.OHQM  Thermal  energy  measuring  (Only  available  on  SR868C8Q)
16.INTV  Pump  interval  function      (Only  available  on  SR868C8Q)
17.BYPR  High  temperature  by-pass  function
(tank  temperature  automatically  adjusting)
18.  HND  Manual  mode
19.PASS  Password  setting
20.LOAD  Recovery  to  factory  setting
21.ON/OFF  button
22.Holiday  function
23.Manual  heating
24.Temperature  query  function
25.Memory  Protection
26.Anti-dry  heating  Protection
27.Screen  protection