Operation manual of solar controller SR1568
Page 53 of 87
Boiler connection diagraph:
Switch on/off signal
When boiler as back-up device is selected, then back-up heating (HK and HR) is controlled
by tank’s sensor T3, if the T3’s value is lower than the switch-on temperature of back-up
heating, the output relay HK and HR is switched on, when T3 is higher than the switch-off
temperature of back-up heating, the output relay HK and HR is switch-off.
Circle (DHW circulation pump control function)
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