SOL3-1
4.1.4 Collector minimum temperature
A minimum collector temperature can be set, underneath which the pump is not turned
on at all. This can be reasonable in cases where it is known that the solar gain ratio lays
below the pump power ratio.
A very low temperature can be set if this function is not desired (e.g. -20
°
C)
Setting
FS
Parameter level / Value range
minimum collector temperature
(turn-off condition)
30
°
C
PA3 / -20
°
to 50
°
C
minimum collector temperature
(turn-on condition)
35
°
C
PA3 / -20
°
to 50
°
C
4.1.5 Start up function
There are collectors (especially evacuated tube collectors, but also flat plate collectors),
where temperature measurement does not work well once the circulation is suspended.
The temperature at the collector sensor only slowly increases even if the collector is
illuminated by the sun. The start-up function can be activated for these cases:
This function can only be used if the collector temperature is below the turn-on threshold
but above the collector minimum temperature. In case that the temperature at the
collector sensor increases by 5 K within 10 minutes, the pump is turned on briefly (20 s).
This leads to transport of heat, and with sufficient radiation to exceed the turn-on
condition at the collector sensor. This start function is repeated every 20 min. if
necessary.
Functions
FS
Configuration
Start up function
0
CO3 -> F03 – 1
EB_37381_SOL3-1_EN002
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