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Differential control
= to keep the temperature between two sensors constant
Keeping the temperature difference between two sensors, e.g. S1 and S2, allow for a „mod
-
ulating“ operation of the collector. If S1 drops due to sinking insolation, the difference be
-
tween S1 and S2 sinks as well. The speed will be lowered, increasing the time the heat
medium spends in the collector, increasing the difference between S1 and S2 again.
Example:
Mode:
Off/Normal/Inverse
Sensor input +/- :
The difference between the temperatures of the warmer sensor (sensor
input +) and the colder sensor (sensor input -) is calculated as actual difference.
Set value diff.:
The set value of the difference is 10K in the example (= FS). As such, accord
-
ing to the example, the difference between S1 and S2 is held at 10K.
Warning:
The
set value diff.
must always be greater than the deactivation threshold diff. of
the basic operation. If the set value diff. is lower, the basic operation blocks the activation
of pumps, before the speed control has reached the set value.
If
absolute value control
and
differential control
are active simultaneously, the lower of the
two speed results will be used.
Summary of Contents for UVR65
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