Functions of the DHW circuit

6 Functions of the DHW circuit

6.1DHW heating in the storage tank charging system

 

 

 

TLP

Heat exchanger

 

SLP

 

 

charging pump

 

TW

VFS/VFT

Flow sensors

 

VFS

TLP VFT

SF1

SLP

Storage tank

 

 

 

ZP

 

charging pump

 

 

SF1

Storage sensor 1

 

 

SF2

SF2

Storage sensor 2

 

 

KW

ZP

Circulation pump

 

 

 

 

 

 

TW

DHW

 

 

 

KW

Cold 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 DHW demand ON by 0.1 °C. If the flow temperature in the system is higher than the required charging temperature, the controller attempts to reduce it in the heat- ing circuit for maximum 3 minutes before the heat exchanger pump together with the storage tank charging pump start to run.

When there is no heating operation or when the flow temperature in the system is lower, the heat exchanger charging pump is switched on immediately. The storage tank charging pump is switched on when the temperature currently measured at storage sensor VFT has reached the temperature measured at sensor SF1.

If a storage tank thermostat is used, the storage tank charging pump is switched on when the temperature T = Charging temperature – 5 °C is reached at sensor VFT.

Note!

The charging temperature VFT is regulated by the primary valve in system Anl 2. In systems Anl 4, 5 and 10, the charging temperature VFT is only regulated by the primary valve when the DHW demand has the highest set point and has priority.

In all other systems (Anl 7, 8 and 9) the mixing valve regulates the charging temperature VFT.

When the Circulation pump function is active, the circulation pump remains in operation ac- cording to the time schedule. The pump is switched off when this function is deactivated.

52EB 5179 EN

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Samson 5100, 5179 operating instructions Vfs/Vft

5179, 5100 specifications

The Samson 5179 and 5100 series are renowned for their innovative design and robust performance in various industrial applications. These models are particularly known for their precision control and reliability in managing fluid flow systems.

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