Table of Contents
Advertisement
Introduction
SOL01 / P01
Start differential
Solar cylinder 1
SOL02 / P02
Stop differential
Solar cylinder 1
SOL03 / P03
Collector protection function
SOL04 / P04
Critical collector
temperature
3062438_0309
Parameter description
The following applies to systems with only one cylinder:
Solar cylinder = solar cylinder 1
The SM2 captures the temperature at the collector and at the
lower section of cylinder 1 at the level of the internal indirect solar
coil. The heating of solar cylinder 1 is enabled when the collector
temperature exceeds the cylinder temperature by the selected
start differential:
Collector temperature >= Cylinder temperature solar cylinder 1 +
Start differential solar cylinder 1 -> Cylinder heating
Systems with bypass circuit:
In systems with bypass circuit the cylinder temperature is
compared with the bypass temperature:
Bypass temperature >= Cylinder temperature solar cylinder 1 +
Start differential solar cylinder 1 -> Cylinder heating
The start differential is always held at least 5 K above the stop
differential (start differential >= stop differential + 5 K), even if a
lower value has been entered to safeguard a reliable operation.
Cylinder heating stops when the collector temperature falls
below the total of cylinder temperature solar cylinder 1 and stop
differential solar cylinder 1.
Collector temperature < Cylinder temperature solar cylinder 1 +
Stop differential solar cylinder 1 -> Cylinder heating OFF
Systems with bypass circuit:
In systems with bypass circuit the cylinder temperature is
compared with the bypass temperature:
Collector temperature < Cylinder temperature solar cylinder 1 +
Stop differential solar cylinder 1 -> Cylinder heating OFF
The collector protection function and reverse cooling are active if
parameter 3 is set to 1.
Collector protection function:
As soon as the collector temperature exceeds the critical
collector temperature, the collector or the respective collector
array (for systems with two collector arrays) receives a flow of
medium. Subject to system configuration the respective outputs
that are required to provide the flow are switched. The flow is
stopped again when the collector temperature = critical collector
temperature - 20 K.
29
Advertisement
Table of Contents
