Bedienungsanleitung Sorel MTDC-E (Seite 22 von 28) (Englisch)

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Example: displayed collector temperature 40°C, read previous temperature 39°C, displayed storage temperature 30°C, read return tem-

perature 31° means a setting of -20% (displayed ∆T 10K, actual ∆T 8K => -20% correction value)

Sensor Calibration

Deviations in the temperature values displayed, for example. due to cables which are too long or sensors which are not positioned

optimally can be compensated for manually here. The settings can be made for each individual sensor in steps of 0.5 °C.

Settings are only necessary in special cases at the time of initial commissioning by the specialist. Incorrect measurement val-

ues can lead to unpredictable errors.

Commissioning

Starting commissioning help guides you in the correct order through the basic settings necessary for commissioning, and provides brief

descriptions of each parameter in the display. Pressing the ‚esc‘ key takes you back to the previous value so you can look at the selec-

ted setting again or adjust it if desired. Pressing ‚esc‘ more than once takes you back to the selection mode, thus cancelling the com-

missioning help (See " Commissioning help " on page 13).

May only be started by a specialist during commissioning! Observe the explanations for the individual parameters in these

instructions, and check whether further settings are necessary for your application.

Factory Settings

All settings can be reset, returning the controller to its delivery state.

All of the controller‘s parametrization, statistics, etc. will be lost irrevocably. The controller must then be commissioned once

again.

Starting aid

For some solar systems, in particular for vacuum tube collectors, the measurement recording on the collector sensors may be too slow

or imprecise, because the sensor is often not on the warmest spot. With an activated starting aid, the following procedure occurs: If the

temperature on the collector sensor increases within a minute by the value defined under “increase”, the solar circulation pump will be

turned on for the set “purging time” so that the medium to be measured is transported to the collector sensor. If there is still no normal

switching condition through this, there will be a 5 minute block time for the start wizard function.

This function should only be activated by a technician if problems occur with the measurement recording. Observe in par-

ticular the instructions from the collector manufacturer.

The menus "Purging time" and "Increase" are only displayed when the starting aid function is set to "On".

Purging time

If the temperature on the collector sensor increases within a minute by the value defined under “increase”, the solar circulation pump will

be turned on for the set “purging time” so that the medium to be measured is transported to the collector sensor. If the set ΔT is not

reached, a 5-minute circulation pause time for the starting aid function will apply.

Increase

If the temperature at the collector reaches within a minute the value defined, the solar pump is turned on for the duration of the purging

time.

Time & Date

Serve to set the current time and date.

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Sorel MTDC-E Seite 22

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