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59
AST 14 C 258/00
CONFIGURATION 2:
Only suitable for boilers with tank heater (P3=3), where the complex solar panel system to
be controlled heats solar accumulation in a forced circulation system via the pump PS and
excess solar energy is dissipated through a secondary service line, via the diverting valve
VM.
The system layout is shown below.
Tank heater filling function (pump ON)
The tank heater temperature is set, via parameter P19, to a value between 10 and
90°C (
default 60°C
).
The PS solar pump activates under the following conditions:
Tsbc < P19-2°C
and
Tscs – Tsbs >
∆
T ON (P20)
and
Tscs > Tmin pump collector ON (P23)
and
Tscs < Tmax pump collector ON (P22-5°C)
where Tsbc is the temperature read by the upper probe of the solar tank heater,
Tsbs is read by the lower probe, and Tscs is read by the solar collector probe.
SOLAR UNIT
MAINS WATER
SUPPLY
SECONDARY
SERVICE LINE
