Solar Panels Antifreezing Protection - Hisense Hi-Therma Series Service Handbook

Air-to-water heat pump, split/integra outdoor unit, split indoor unit, integra indoor unit, monobloc

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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 fulfilled.

① [Tsolar] is higher than [Tsolar_antiFreezing].

② [TDHW] is less than [Tsolar] +2 °C.

1. Overheat protection is available when [Solar_s] set as [solar sensor].

Control function