Danfoss VLT HVAC Basic Drive FC 101 Manual do Utilizador descarregar pdf (Página 11)

Meticulous control of fans saves energy and keeps noise and draft at a minimum.

Dedicated fan features

User-friendly, distributed intelligence

and reduced power consumption are

beneﬁ cial for fan applications.

Lower AHU costs

The VLT® HVAC Drive is ﬁ tted with a

built-in Smart Logic Controller and 4

auto tune PID controllers and can

control air handling functions with

fans, valves, and dampers. The build-

ing management’s DDC-’s are thereby

released and valuable data points (DP)

are saved.

Extends BMS capacity

When integrated into the BMS net-

work, all the HVAC Drive I/O points are

available as remote I/O’s to extend

BMS’s capacity. For example, room

temperature sensors (Pt1000/Ni1000)

can be directly connected.

Resonance Monitoring

By pressing a few buttons on the

Local Control Panel the drive can be

set to avoid frequency bands at which

connected fans create resonances in

the ventilation system. This improves

building comfort.

Intelligent AHU functions

The VLT® HVAC Drive handles logical

rules and input from sensors, real-

time functionality, and time-related

actions. This enables the HVAC Drive

to control a wide range of functions,

including:

• Weekend and working-day

operations

• Cascaded P-PI for temperature

control

• Multi-zone pressure control

• Flow balancing between fresh

and outlet air

Belt Monitoring

From the relation between current

and speed, the VLT® HVAC Drive is able

to reliably recognize a broken belt.

Lack of air ﬂ ow detected immediately,

ﬁ rst cost and down-time is reduced.

Fire Override Mode

Fire Override Mode prevents the VLT®

HVAC Drive to stop of self-protecting

reasons. In this mode it will continue

vital fan operation regardless of

control signals, warnings or alarms.

Stairwell Pressurization

In the event of ﬁ re, the VLT® HVAC

Drive can maintain a higher level of

air pressure in stairwells than in other

parts of the building and ensure that

ﬁ re escapes remain free of smoke.

Speed

Diﬀ erential

pressure

Easy to open

doors

Fresh

air in

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