Bedienungsanleitung Sorel LHCC (Seite 33 von 44) (Englisch)

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If the temperature difference between the sensors defined for this function exceeds the value set here (ΔT SF On), the function

switches on the assigned output (relay or signal output).

If the set temperature difference (ΔT SF Off) between the solids boiler and the storage tank is below, the function switches off the

assigned output (relay or signal output).

Boiler sensor of this function

Sensor used as a solids boiler sensor. Considered for SF Tmin and ΔTon/off.

Storage sensor

Sensor used as a storage tank sensor. Considered for FS Tmax and ΔTon/off.

Solar

This function is used to control a solar pump.

Tmin Collector

Enable/start temperature at sensor X:

If this value on the specified sensor is exceeded and the other conditions are not fulfilled, the controller will turn on the affiliated

pump or the valve. If the temperature on the sensor falls 5 °C below this value, the pump or the valve will be turned off again.

ΔT Solar

Switch on/switch off temperature difference for sensor X:

If the temperature difference ΔT Solar between the reference sensors is exceeded and the other conditions are fulfilled, the con-

troller will turn on the pump/valve on the corresponding relay. If the temperature difference falls to ΔT Off, the pump/valve will be

turned off again.

Tmax Storage

Switch off temperature at sensor X:

If this value is exceeded at the specified sensor, the controller turn off the affiliated pump or the valve. If this value on the sensor is

undershot and the other conditions are fulfilled, the controller will turn on the pump or the valve.

Temperature values which are set too high can lead to scalding or damage to the system. Scalding protection must be

provided by the customer!

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 cir-

culation 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

particular 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.

Protective Functions

see " Protective functions for Solar " on page 22

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Sorel LHCC Seite 33

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