Page 40 - VSD_Brochure_31102023

HVAC DRIVES
Premier HVAC control
ABB HVAC drives are ideal for
all your HVAC applications,
such as air-handling units,
chillers, and cooling towers.
They are suitable for use in a
wide range of facilities from
residential and commercial
buildings to hospitals, data
centres, airports and tunnels.
1 Cooling tower
Cools down the condenser
water.
• The drive controls the speed of
multiple fans simultaneously to
achieve high energy savings,
while optimising the installation
cost.
3 Condenser water pump
Circulates water between the cooling tower and the chiller.
• Energy savings can be achieved with variable frequency drives that adjust pump
speed to the cooling load.
40 | Variable Speed Drives
40 | Variable Speed Drives
3
2
4
2 Chiller
Chills water or other
liquid to cool down and
dehumidify the indoor air.
• The drive controls the speed
of the compressor for better
energy efficiency.
• By-pass valves can be
avoided
• Less mechanical stress as
there are less starts and
stops, and they are soft.
1
5
4
6
4 Chilled and hot water 6 Air handling unit
circulator pumps
• Mechanical resonance
speeds can be avoided. Circulate water (or other liquid) between Supplies, mixes, cleans, humidifies/
• Maximum speed is not heating coil and boiler or cooling coil and dehumidifies, heats/cools air.
limited by nominal supply chiller. • Drives can be used to:
frequency. • The cooling and heating loads vary a lot – Control the speed of supply and return
• Less stress to supply over time. Speed controlled circulator fans
network as high inrush pumps make sure that an adequate – Eliminate mechanical stress
currents can be avoided amount of heating or cooling is distributed – Avoid fan resonance
with VSD controlled start in the building. – Control the speed and efficiency of the
optimising the installation • Soft start and stop of the pump reduces rotary heat exchangers
cost. hydraulic stress on pipelines and valves. – Control the dampers
– Monitor AHU condition including filter
clogging, fan belts and heating coil
freeze
5 Boiler
• ABB HVAC drives’ override mode secures
Heats up the water for building heating/ drive operation in case of fire.
domestic hot water supply.
• The drive controls the burner fan to adjust
the amount of combustion air to the
heating load.
Variable Speed Drives | 41
Variable Speed Drives | 41