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Control function
10.7.3 Solar panels antiFreezing protection
The solar panels may be frozen in the winter. It is necessary to circulate hot water to the solar panels to prevent them from
being frozen . when hot water temperature of solar panels [Tsolar] is too low , the solar pump begins operating in order to
transfer the heat to the solar panels through heat exchanger.
● Solar pump ON when all of the following conditions are met.
①
[Tsolar] is less than [Tsolar_antiFreezing]-2 °C.
②
[TDHW] is higher than [Tsolar] +6 °C.
● Solar pump OFF when any of the following conditions is fullled.
①
[Tsolar] is higher than [Tsolar_antiFreezing].
②
[TDHW] is less than [Tsolar] +2 °C.
NOTE:
1. Overheat protection is available when [Solar_s] set as [solar sensor].