Danfoss VLT HVAC Basic Drive FC 101 Manual de usuario descargar pdf (Pagina 9)

Dedicated pump features in VLT® HVAC Drive

The VLT® HVAC Drive oﬀ ers a vast

number of pump-speciﬁ c features

developed in cooperation with OEMs,

contractors and manufacturers

around the world.

Pump Cascade Control Option

The Pump Cascade Control Option is

the most sophisticated controller on

the market.

It distributes running hours evenly

across all pumps, keeps wear and tear

on individual pumps to a minimum

and ensures that all pumps are in

great shape.

Vital water supply

Vital water supply can be assured in

the event of leakage or a broken pipe.

For example overload is prevented by

reducing speed – and supply is secur-

ed at lower ﬂ ow.

Sleep Mode

In Sleep Mode the drive detects situa-

tions with low or no ﬂ ow.

Instead of continuous operation it

boosts the system pressure and then

stops to save energy. The drive starts

automatically when the pressure falls

below the lower set point.

Dry Pump Protection and

End of Curve

Dry Pump Protection and End of

Curve relate to situations where the

pump runs without creating the de-

sired pressure – as when a well runs

dry or a pipe leaks.

The drive sets oﬀ an alarm, shuts oﬀ

the pump, or performs another

programmed action.

Auto tuning of the PI controllers

With auto tuning of the PI con trol lers,

the drive monitors how the system

reacts on corrections made by the

drive – and learns from it, so that

precise and stable operation is

achie ved quickly.

Gain factors for PI are conti nuously

changed to compensate for changing

characteristics of the loads. This

applies to each PI controller in the

4-menu sets individually.

Exact P and I settings at start-up will

not be necessary – which lowers the

commissioning costs.

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