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Danfoss VLT® HVAC Drive
Inverter Drives VLT FC102 6000
VLT® HVAC Drive - The Benefits of Ownership
Today the vast majority of new public building
projects use AC drives for the fans, pumps and compressors on the
air conditioning systems. Globally, Danfoss finds itself at the
heart of such projects, VLT® drives being selected for their
compatibility with most BMS control systems, simplifying and
reducing installation costs. This ensures close comfortable control
of the building environment and facilitates simple updating of the
system. Prestige buildings such as the Natural History Museum,
Belfast International Airport and the ‘Gherkin’ in London all use
VLT® HVAC Drives to control their environments. The recent
installation of VLT® HVAC Drives at Chester Zoo has resulted
in significant energy savings, reduced carbon consumption and a
payback period of less than seven months.
VLT® HVAC Drive - 1.1kW to 1.4MW
The VLT® HVAC Drive has been designed
specifically for fan, pump and compressor applications, especially
within the building services environment. Dedicated to applications
within the air conditioning market, the VLT® HVAC Drive is
the world’s leading HVAC drive. Power sizes range from 1.1kW to
1.4MW in a variety of IP rated enclosure styles.
VLT® HVAC Drive Features
User Centred Design - Programming
the VLT® HVAC Drive is child’s play. From the initiation of
the design process, Danfoss design engineers spent weeks ‘in the
shoes’ of the end users. The result is the extremely user friendly
and intuitive award winning human-machine interface that reflects
familiarity with mobile phone use. The alpha-numeric graphical
display on the keypad also offers fewer codes and clearer text.
Automatic Energy Optimiser (AEO) -
Ensures maximum energy savings by optimising the motor’s magnetic
field under all load conditions. This feature also simplifies drive
set-up and minimises motor noise levels.
Sleep Mode - In this mode the drive
detects situations with low or zero flow. Instead of continuous
operation, it boosts system pressure and then stops to save energy
and starts again when the pressure falls below the lower set-point.
Serial Communications - VLT®
HVAC Drive offers compatibility with BACnet, Modbus RTU,
METASYS and SIEMENS FLN as standard and can be delivered
with the Lonworks open protocol as a built in option.
Wide Enclosure Choice - The VLT®
HVAC Drive is available in IP00, IP20, IP55 and IP66 enclosures
as standard. The ‘bookshelf’ designs are available for high-density
panel installations. The ultra-compact IP55 enclosures are easily
mounted directly on a wall, the AHU or pump skid. The IP66 option
can be suitable for external use.
Fire Override Mode - In the event
of fire the VLT® HVAC Drive will run until eventual
self-destruction. It can be set to maintain a higher level of air
pressure than in other parts of the building, ensuring that fire
escapes remain clear of smoke.
Stand-alone Functionality - The
VLT® HVAC Drive provides intelligent stand-alone functionality
via:-
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Built-in ‘real time’ clock
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Smart Logic Controller
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Four auto-tuned PID controllers
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Programmable scheduled maintenance function
Power Factor - The VLT® HVAC Drive
maintains near unity power factor at all loads and speeds and minimises the need
for power factor correction equipment, giving both space and financial savings.
EMC - Electromagnetic Compatibility
- Electromagnetic ‘noise’ is an important consideration when ensuring
compatibility between frequency converters and other building services
equipment, computers or other sensitive equipment in the building environment.
VLT® HVAC Drive meets all international standards on EMC compatibility on
both emissions and susceptibility.
Harmonics - The importance of chokes and
filters in all medium and high power applications cannot be overstated. The
chokes and filters integral to the VLT® HVAC Drive ensure that mains
harmonics are minimised while output cable length to the motor is maximised,
eliminating the need for output line chokes. Motors do not have to be de-rated
to allow for the harmonic content of the output waveform and the output circuit
can if necessary be broken under load without auxiliary control switching or
concern for switching surges.
Technical information associated with:
Danfoss VLT Drives Principles Advantages of Inverter Drives
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