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Absolute value control
= keeping a sensor‘s value constant
The absolute value control is set via two parameter windows. The example shows typical
settings:
Mode:
Off/Normal/Inverse
Normal operation means that the speed increases along with temperatures and is valid for
all applications to keep a „feed sensor“ constant (collector, boiler, etc.).
Inverse operation means that the speed decreases along with rising temperatures and is
necessary to maintain a return temperature.
Sensor input:
Temperature at this sensor is to be held at a constant level.
Set value selection:
Specify a set value / use set flow temperature
Set value:
This temperature is to be held constant. (FS = 50°C)
Differential control
= keeping the difference in temperature between two sensors constant, e.g. the difference
between heating flow and return (spread).
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
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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