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SOL22 / P22
Start differential, parallel
cylinder operation
SOL23 / P23
Differential temperature,
bypass operation
SOL24 / P24
Function, output A4
36
Parameter description
With system configurations 3 and 11, both solar cylinders are
operated in parallel.
If during heating the cylinder with priority the temperature differential
between the collector and the cylinder with priority exceeds the
selected value, the lower ranking cylinder will be heated in parallel
to the cylinder with priority.
Collector temperature > Cylinder temperature cylinder with priority
+ Start differential parallel cylinder operation -> Parallel cylinder
operation
If the temperature differential falls again 5 K below the selected
value, then parallel operation will terminate and only the cylinder
with priority will continue to be heated:
Collector temperature > Cylinder temperature cylinder with priority +
Start differential parallel cylinder operation -5 K -> Parallel cylinder
operation terminates
With system configurations 9,10,11 a bypass circuit to compensate
line losses is integrated. A three-way diverter valve switches over
between bypass and cylinder heating. Initially, the solar circuit is
operated in bypass mode. Only when the temperature captured by
the bypass sensor is adequate for cylinder heating will the system
change over to cylinder heating.
Bypass operation will commence when the temperature differential
between collector temperature and solar cylinder exceeds the
selected value:
Collector temperature > Cylinder temperature solar cylinder +
SOL23 / P23
The three-way diverter valve changes to cylinder heating when the
bypass temperature is adequate for heating the cylinder.
Bypass temperature >= Cylinder temperature solar cylinder +
Start differential
The following functions can be allocated to output A4:
SOL24 / P24 = 0: no function
SOL24 / P24 = 1: Cylinder de-stratification
Pasteurisation mode
SOL24 / P24 = 2: Thermostat function
With SOL24 / P24 = 1 the pump connected to the boiler is switched
to circulate the cylinder contents when pasteurisation is active.
With SOL24 / P24 = 2 output A4 is switched, if the cylinder
temperature falls below the value selected in SOL25 / P25:
Cylinder temperature < SOL25 / P25 -> A4 enabled
This allows a cylinder reheating to be enabled.
3062438_0309
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