Operation manual of solar controller SR1568
Page 16 of 87
System 2: Solar system with 1 tank, 1 collector field, 3-ways valve for tank loading in
layers
Description:
The controller calculates the temperature
difference between collector sensor T1 and
tank base and upper sensor T2, T3. If the
difference is larger than or identical to the
adjusted switch-on temperature difference, the
solar circulation pump (R1) will be switched on,
and simultaneously valve R4 turns to the
corresponding tank zone and this zone will be
loaded until the switch-off temperature
difference or the maximum tank temperature is
reached.
The priority logic effects prior loading of the
upper zone of the tank
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