Samson TROVIS 5500 - 7 Functions of the DHW Circuit; DHW Heating in the Storage Tank System

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EB 5573-1 EN 87

Functions of the DHW circuit

7 Functions of the DHW circuit

7.1 DHW heating in the storage tank system

Start storage tank charging

SF1

SLP

SLP Storage tank charging pump

SF1 Storage tank sensor 1

ZP Circulation pump (DHW)

WW Hot water

KW Cold water

Fig. 6: Schematics of a storage tank system

The controller begins charging the storage tank when the water temperature measured at

storage tank sensor 1 falls below the 'DHW temperature set point' by 0.1°C. If the ow tem-

perature in the system exceeds the desired charging temperature, the controller tries to re-

duce the ow temperature in the heating circuit for up to three minutes before the storage

tank charging pump is activated. When there is no heating operation or when the ow tem-

perature in the system is lower, the storage tank charging pump is switched on immediately.

If the function CO4>F15 - 1 (SLP ON depending on return ow temperature) is activated,

the primary valve is opened without simultaneously operating the storage tank charging

pump. The storage tank charging pump is rst switched on when the primary return ow

temperature has reached the temperature currently measured at storage tank sensor 1. This

function enables storage tank charging when the heating system is switched off, e.g. in sum-

mer mode, without cooling down the storage tank rst by lling it with cold ow water. The

storage tank charging pump does not start operation before a sufciently high temperature

has been reached at the heat exchanger.

Note:

The 'DHW temperature set point' is to be regarded in relation to the charging tem-

perature if a storage tank thermostat is used.

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