Functions of the DHW circuit

6.2DHW heating in the storage tank charging system

SF1

Storage tank sensor 1

SF2

Storage tank sensor 2

SLP

Storage tank charging pump

VF

Flow sensor

TLP

Heat exchanger charging pump

ZP

Circulation pump

KW

Cold water

WW

Hot water

Fig. 5 · DHW heating in a storage tank charging system

Start storage tank charging

The controller begins charging the storage tank when the water temperature measured at sen- sor SF1 falls below the set point DHW heating ON or the temperature adjusted at the storage tank thermostat:

DHW heating from the secondary circuit (Anl 3, 8):

If the flow temperature of the system is higher than the required charging temperature, the con- troller tries to reduce the temperature on the heating circuit side three minutes at the maximum before the storage tank charging pump starts. If heating operation is not taking place or the flow temperature in the system is lower, the storage tank charging pump is switched on immedi- ately. If the currently measured temperature at sensor VF is reached, the storage tank charging pump is switched on.

DHW heating from the primary circuit (Anl 5, 11):

The storage tank charging pump (Anl 5) or the heat exchanger charging pump (Anl 11) is started immediately. The controller regulates the temperature to the Charging temperature.

Note!

In systems Anl 3, 8 and 11, the charging temperature in the storage tank charging circuit is re- gulated over the flow sensor VF3 when it is activated on switching on the storage tank charging pump.

The heat exchanger inlet temperature is monitored at sensor VF1 (Anl 3) or VF2. If it reaches the Heat exchanger inlet temperature limit, the limit is used as the basis for the set point for the follo- wing heat exchanger inlet temperature control.

EB 5476 EN 51

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Samson 5476 manual DHW heating in the storage tank charging system, · DHW heating in a storage tank charging system

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