TacoTherm Dual ZEPTO

Functional description

3.5.2 Differential pressure control valve

The differential pressure control valve ensures there is a constant

differential pressure in the subsystem ( Ä Further information

on page 45).

Fig. 21: Differential pressure control

valve

3.5.3 Water hammer damper

3.5.4 Safety DCW valve (Option)

Fig. 22: Safety valve

3.5.5 Flow limiter

To prevent water hammer from damaging the system, a water hammer

damper is used. Water hammer is caused by shut-off valves closing

quickly.

The safety valve (Fig. 22) depressurises the unit in the event of

excess pressure. The safety valve is calibrated for a pressure of

10 bar and does not need to be set during commissioning.

A pressure relief line must be connected to the safety valve during

installation (

Ä Chapter 5.4.5 ‘Connecting the pressure relief line to

the safety valve’ on page 39).

The use of a flow limiter limits the district cold water (DCW) to a spe-

cific quantity. This causes a not insignificant loss of pressure.

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Operating instructions

V03 06/2025 Item no. 215250 EA no. 1292