Category: Danfoss HVAC Inverter Drives VLT 2800 6000
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Danfoss VLT® Drives
HVAC
Inverter Drives VLT
Danfoss VLT® Drive makes HVAC operation child’s play
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 cost-reducing installation and adding easy
offsite monitoring via built-in modems. This not only ensures close,
comfortable control of the building environment but facilitates simple
updating of the system and remote adjustment and troubleshooting.
Prestige buildings such as the Natural History Museum, Wembley Stadium,
the ‘Gherkin’ in London, Belfast International airport and many, many
more, all use VLT® HVAC Drives to control their environments. Danfoss
drives meet all relevant ISO, EN & BS quality assurance standards and
the entire range is designed to meet all relevant product standards,
including UL and CSA ratings.
VLT® HVAC Drive - 1.1kW to 450kW
The VLT® HVAC Drive has been designed specifically for fan, pump and
compressor applications, especially within the building services
environment. As an application specific drive, 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 450kW in both
IP20/21 and IP55 compact 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 graphical
display also offers fewer codes, more clear text, fewer rows of numbers
and more graphs. All drives ratings can be programmed with a common,
award winning, detachable, alpha-numeric keypad.
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 Modbus
RTU, METASYS and SIEMENS FLN as standard and can be delivered with the
Building Services open protocols of BACnet and Lonworks as built in
options.
Wide Enclosure Choice - The VLT® HVAC Drive is available in IP20 and
IP55 enclosures as standard. IP20 ‘bookshelf’ designs are available for
high-density panel installations and the ultra-compact IP55 enclosures
are easily mounted inside an HVAC unit or control panel. The optional
IP66 protection class requires no cabinet at all.
Fire Override Mode - In Fire Override mode, the VLT® HVAC Drive, in the
event of fire, will continue to 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 :-
- Built-in ‘real time’ clock
- Smart Logic Controller
- 4 auto-tuned PID controllers
- Programmable scheduled maintenance function
Pump Cascade Control - The pump cascade controller is the most
sophisticated on the market but is standard on VLT® HVAC Drive. It
distributes running hours evenly across all pumps, keeping wear and tear
on individual pumps to a minimum and ensuring that all pumps are in
great shape.
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 - Principles / Advantages of Inverter Drives
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Danfoss VLT® Drives
Capswood
Oxford Road
Denham
Bucks
UB9 4LH
Tel : 0870 241 7100
Ireland Freephone : 1 800 946332
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