Degassing the pump. DAB EVOSTA 2

17.1

Degassing the pump

ENGLISH

Figure 17: Venting of the pump

Always vent the pump before starting!

The pump must never run when dry.

18.

FUNCTIONS

18.1

Regulating Modes

EVOSTA2 SOL circulators allow the following regulating modes depending on plant requirements:

−

Proportional differential pressure regulation depending on the flow present in the plant.

− Regulation with constant curve.

The regulating mode may be set through the EVOSTA2 SOL control panel.

18.1.1

Regulation with Proportional Differential Pressure

54

In this regulating mode the differential pressure is reduced or increased as the demand for water decreases or increases.

The Hs set point may be set from the display.

Regulation indicated for:

– Heating and conditioning plants with high load losses

– Plants with secondary differential pressure regulator

– Primary circuits with high load losses

– Domestic water recirculating systems with thermostatic valves on the rising columns