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7/28/2019 APP HVAC Applications V2
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HVAC applicationsMotion & Drives Training
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2Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC ApplicationsSummary
> Introduction> HVAC Systems
> Energy Savings> Altivar 21> Altivar 61> Our Markets> Conclusions> Quiz
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3Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC ApplicationsSummary
> Introduction> HVAC Systems
> Energy Savings> Altivar 21> Altivar 61> Our Markets> Conclusions> Quiz
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4Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
IntroductionWhat is HVAC ?
HVAC stands for
High Voltage
AC drives ?
These 3 functions are closely interrelated in buildings.
Pumpingfunctions are also often used in Buildings applications.
HVAC is based on the basic principles ofthermodynamics, fluid mechanics
and heat transfers.
H HeatingHV , VentilationHVAC , AirConditioning
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Summary
IntroductionWhy HVAC ?
Provide thermal comfort
Provide acceptable indoor air quality
Improve the commissioning of installations
Reduce the maintenance costs
The aims of HVAC applications are
In every kind of buildings
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Summary
IntroductionHVAC market
The HVAC Market is strictly regulated by law :
Few regulation :
Only one contractor who sizes,
selects, builds and sets up HVAC
systems and equipments.
Building services designers and engineers arerequired by law :
1. Analyze, design and specification of HVAC
systems by engineering services.
2. Building and commissioning by specialty
mechanical contractors.
Building permits and code compliance inspections of the installations are required
http://www.salebete.net/archives/imagesaout06/immeubles42erue.JPG7/28/2019 APP HVAC Applications V2
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Summary
IntroductionWhere is HVAC market ?
HVAC Market :
20% OEM
Mc Quay , Carrier , York , Trane , Wolf,
80% Mechanical contractors
Our main competitor in HVAC :
Danfoss , ABB , Yaskawa ,
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8Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
IntroductionHeating and Cooling
Heating and Cooling solutions :
Water Stage.
Air Stage.
Water stage :
The most efficient and cheapmedium that we can cool (through
a chiller) or heat (through a boiler)
Air stage :
The medium for heat exchange in
the building, Can be cooled or heated through
coils.
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9Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC ApplicationsSummary
> Introduction> HVAC Systems
> Energy Savings> Altivar 21> Altivar 61> Our Markets> Conclusions
> Quiz
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10Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC Systems
Pumping
Ventilation Heating
Air Conditioning
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11Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsVentilation
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12Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsVentilation
Ventilation is the process of "changing" or replacing of air in any space
to remove moisture, odors, smoke, heat, dust and airborne bacteria.
Methods for ventilating a building may be :
Mechanical or forced ventilation (with fans)
Natural ventilation (without fan)
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13Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsVentilation : How to move and mix the air ?
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14Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsVentilation : Air Handler Unit
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15Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsVentilation : Other units
Pipes, Ducts and Diffusers Cooling tower fans
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16Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsHeating and Air Conditioning
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17Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsHeating
Heating is the process to maintain a closed area to a certain temperature
with a cool external atmosphere.
Heating systems may be central orlocal.
Heat Production. Boilers, furnaces or heat pumps to heat water, steam or air.
Heat transfersystems.
Ductwork or Piping.
Heating elements to transfer the heat to the air Radiators or Vents.
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HVAC SystemsHeating : Boilers
Dual fuel Boilers Gas Boilers
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19Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsAir Conditioning
Air Conditioning and refrigeration are provided through the removal of heat.
Cold = absence of heat.
All air conditioning systems work on basic principle of removing heat.
The aim is to maintain temperature with a comfortable range.
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20Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsRefrigeration : The states of the matter
Heat must be added to a substance tomake it changes of state :
From solid to liquid.
From liquid to gas.
Heat must be removed to a substance tomake it changes of state :
From gas to liquid.
From liquid to solid.
liquidsolid gas
gas
liquid
solid
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21Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsRefrigeration cycle
A refrigerant
Liquid or gas
absorbs heat from one area and
relocates it to another one.
A compressor
Gas pressure , A condenser
, vapor condenses to a fluid. An expansion valve
Fluid pressure
An evaporator
, the fluid evaporates.
The refrigeration cycle consists of 5 essential elements to create a cooling effect :
HVAC S
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22Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsAir Conditioning : Chillers
Function : Generate cooling for removing heatfrom a building.
2 main types of chillers :
Air cooled chiller :
Located outside the building.
Reject heat to the atmosphere.
Water cooled chiller :
Located within the building.
Use cooling towers outside to reject the heat.
More efficient than air-cooled.
Air cooled
Centrifugal Water cooled
HVAC S t
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27Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsAir Conditioning : Cooling Tower Fan
Cooling towers are important parts of many
HVAC systems.
Their fans remove heat from water.
The fan speed is controlled to maintain the
optimal condenser water temperature.
HVAC S t
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28Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsHeat Pump
Machine or device that moves heat from one
location to another one.
Reversible device.
Cooling mode,
Heating mode
HVAC S t
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HVAC SystemsHeat Pump : Cooling Mode
HVAC S t
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HVAC SystemsHeat Pump : Heating Mode
HVAC S stems
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31Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsHeat Pumps
HVAC Systems
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HVAC SystemsExample : Chilled Water System
HVAC Systems
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HVAC SystemsExample : Chilled Water System - Where are the Drives ?
Chiller
Fan
Cooling tower
Chilled
WaterPump
PumpPump
Condenser Pump
Compressor
HVAC Systems
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HVAC SystemsPumping
HVAC Systems
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35Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsPumping
Pumps are used in a lot of HVAC applications : Water circulation in central heating.
Chiller compressors.
Chilled pumps.
Condenser pumps.
Pumps are also used in buildings for other pumping applications
Water distribution.
Green watering.
Industrial washing machines.
Waterworks.
HVAC Systems
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36Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC SystemsPumping : Compressors
Different types of compressors : Reciprocating (Piston) :
more common, cheaper
smaller sized units
Rotary screw :
Compact
Power range : 150 to 1500 kw
Rotary scroll :
10% more efficient than the other types
smaller sized units such as unitary heat pumps Rotary centrifugal :
used for large chillers, above 500kw
HVAC Applications
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37Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
HVAC ApplicationsSummary
> Introduction> HVAC Systems
> Energy Savings> Altivar 21> Altivar 61> Our Markets> Conclusions
> Quiz
Energy Savings
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38Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
Energy SavingsElectricity Consumption
For the processes and the building utilities :
72 % of consumed electricity are used to turn motors
63 % of this energy is used for the fluid applications
In a typical building :
50% of all energy is used is for HVAC operations.
Electricity consumption growth for air conditioning was around 55% in the
last 10 years.
Compression
30 %
Pumping
20 %Ventilation
13 %
Process
37 %
Energy Savings
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39Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
Energy SavingsLaws for Centrifugal Loads
It s pure physics : due to the laws that govern centrifugal fans and pumps,the volume of air or water decreases directly with fan or pump speed.
Affinity laws of centrifugal loads :
So, a small reduction in speed produces a significant reduction in power.
Relevant applications : fans, pumps, compressors.
Flow = f (motor speed)
Pressure = f (motor s peed)
2
Power = f (motor s peed)3
Energy Savings
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40Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
Energy SavingsConventional Installation
Motor supply : direct on line.
Motor speed = nominal speed
Flow variation is obtained by device of
restriction or pressure loss - valve, incliner...
The flow reduction makes fall very little the
absorptive power.
Energy Savings
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41Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
Energy SavingsInstallation with VSD Drives
Motor supplied with a Variable Speed Drive.
Elimination of the restriction device.
Flow variation is obtained directly by
varying the motor speed.
The flow reduction drops considerably the
absorbed power.
Energy Savings : Fans
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42Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
Energy Savings : FansThe Fan Power Curve
Conventional installation :
Variation in flow obtained by a load loss system (outlet or suction valve). Fixed motor speed.
Outlet valve Suction valve
10 20 30 40 50 60 70 80 90 100 Flow
Power
100 %
90 %
80 %
70 %
60 %
50 %
40 %
30 %
20 %
10 %
0 %
Outlet valve
Suction valve
Energy Savings : Fans
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Energy Savings : FansThe Fan Power Curve
Variable speed drive installation :
Variation in flow obtained by varying the motor speed.
Power
100 %
90 %
80 %
70 %
60 %
50 %
40 %
30 %
20 %10 %
0 %
10 20 30 40 50 60 70 80 90 100 Flow
Outlet valve
Suction valve
VSD drive
10 20 30 40 50 60 70 80 90 100 Flow
Outlet valve
Suction valve
VSD drive
Power
100 %
90 %
80 %
70 %
60 %
50 %
40 %
30 %
20 %10 %
0 %
Flow regulation : 80% of nominal flow
Outlet valve
The power consumption is 95% of
nominal power
Variable speed drive
The power consumption is 50% of
nominal power
Energy Savings : Centrifugal Pumps
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Energy Savings : Centrifugal PumpsIntroduction
Centrifugal pumps cover a very wide spectrum in terms of power, flow rate
and pressure
They are used in a host of applications, notably in the water sector
This is the most widespread type of pump
60% to 90% of pumps are centrifugal pumps
Surface Pump
Submersible Pumps
Main Applications :
Fluid transfer
Water supply
Irrigation
Flood control
Energy Savings : Centrifugal Pumps
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e gy Sa gs Ce uga u psPrinciple
The principle involves actuating an impeller that transfers mechanical energy
to the fluid, which is then converted into :
Potential energy (represented by the pressure)
Kinetic energy (represented by the flow rate).
Their resisting torque varies with the
square of the speed T= kNTorque
NnStartingTorque
Nominal
Torque
50%
25%
Tn
50%
70% Speed
Energy Savings : Centrifugal Pumps
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gy g g pFundamental Characteristics
The major parameters used in pumping are :
Flow rate Q : Volume of fluid transported per unit oftime
(m3/s)
Head H : Pressure at a given point of circuit expressed in
m as the height of the fluid in vertical column
A pumps Total Dynamic Head TDH represents the
pressure differential between the inlet and the outlet
expressed as the fluid column height
Pressure P expressed in Pascal (Pa)
Pu = g H Q : density of the fluid (kg/m3)g : acceleration due to gravity (9,81 m/s)
Mechanical power : P = (1 / ) Pu The pumps efficiency which varies with the flow rate.
Best Efficiency PointBEP
BEP
Energy Savings : Centrifugal Pumps
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gy g g pOperating Point
Simplified distribution circuit :
Z : Water column height between the suction point and the point
at which the fluid is used.
R : Head loss due to frictions in the conduits.
Proportional to the square of the flow rate.
Operating Point : intersection between circuit and pump curves.
Energy Savings : Centrifugal Pumps
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gy g g pVarying the Flow Rate at a Fixed Speed
Use of downstream valves from the pump :
Reduction of the effective cross-section of the
pipe downstream from the pump
Increase in head loss in the circuit
Pressure increases at the outlet
Dissipation of energy in the fluid
Using a by-pass circuit :
By-pass valve which returns some of pumped
fluid back to the source
Flow rate is closely controlled
Drawback : low energy efficiency
Energy Lost
A
C
A
C
B
Energy Savings : Centrifugal Pumps
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gy g g pVarying the Flow Rate at a Variable Speed
Use a variable speed drive :
Reduction of the flow rate by altering the pumps rotational speed
The TDH curve at lower speed has homologous form (parabola) than nominal curve
We can observe a significant reduction in power in the variable speed
configuration
A
C
A
C
B
Energy Saved compared
to Downstream ValveEnergy Saved compared
to By-Pass Valve
Energy Savings : Other Pumps
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50Schneider Electric - Motion & Drives t ra in ing - HVAC Applications V1 30/05/2008Summary
gy gRotodynamic Pumps
Lob Pumps
Gear Pumps
Screw Pumps, cavity pumps
Peristaltic
Pump
Energy Savings : Other Pumps
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Rotary Volumetric Pumps
Their torque characteristic is not quadratic.
We can consider as constant torque load T=kN
The real torque profile depends on the pumps technology
ATV61 can be adapted to this load if the starting torque is < 110% - 120%
Example : Torque profile for a screw pump
Speed
Torque
Nn
StartingTorque
NominalTorqueTn
Main Applications :
Viscous fluid transfer (Oil)
Compressors
Vacuum Pumps
Energy Savings : Other Pumps
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Reciprocating-type Pumps
Piston pumps
Torque constant load and high starting torque ATV61 is not adapted to this load. Its a ATV71s domain
Main Applications :
Dosage
High Pressure
Nn
Cn
Speed
Torque High Starting TorqueNominalTorque
Energy Savings : Other Pumps
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Energy Savings
With non centrifugal pumps the savings are less than with centrifugal pump. But, anyway, the fact to reduce the speed for varying the flow rate allows
energy savings compared to fixed speed pumps.
A
C
Energy Savings
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The Drive Benefits
The Benefits to use variable speed drives are :
An optimized electric consumption.
Savings in electricity costs between 15 and over 50% are achieved.
Enhanced performances.
More comfortable utilization.
Easier installation.
Significant reduction of noise pollution.
Allow to save money.
Very quick return on investment : between 9 and 24 months.
Energy SavingsECO 8 S ft
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ECO 8 Software
ECO8 software :
Demonstration of Electric Savings.
Help for sales promotion.
Estimation based on on the motor characteristics
and the operating cycle.
Result sheets :
Power consumption with and without drive
Savings made
Time for return on investment
HVAC ApplicationsS
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Summary
> Introduction> HVAC Systems> Energy Savings> Altivar 21> Altivar 61> Our Markets> Conclusions
> Quiz
Altivar 21
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Altivar 21 is a range of Drives specially
designed for HVAC applications in
Residential market
Power range from 0,75 to 75 KW
Altivar 21Main Features
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Main Features
IP54
IP20 Benefit from all indispensable functions for fans
and pumps functions.
Variable Torque offer for 3-phases asynchronous
motors :
Power range from 0,75 to 75 KW
3-phases 200-240V and 3-phases 400-480V.
UL type 1 / IP20 or IP54 ranges.
Integrated EMC class A or B filters.
Harmonic less technology.
THDI < 30% without added devices.
International Standards and Certifications :
CE, UL, CSA, C-Tick
Altivar 21Main Features
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Main Features
Economical.
Specially designed to optimize HVAC needs. Energy Savings.
Special Energy Savings law for Motor Control.
Harmonic less technology.
Simple.
Easy to use :
Plug and Drive usage.
Adaptive tuning of ramps.
Remote Terminal.
Compact.
Easy integration in the machines.
Safe.
Protections of the motors and the drives.
Altivar 21Open communication Option
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Open communication - Option
Modbus protocol integrated as standard.
Optional communication board for main types
of bus used in building management :
LonWorks
BACnet METASYS N2
APOGEE FLN
LONWORKS
METASYS N2
BAC NET
APOGEE FLN
Altivar 21ATV 21 Ventilation functions
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ATV 21 Ventilation functions.
Energy Savings : Management of Electricity consumption.
V/Hz Energy Saving law.
Monitoring :
Diagnostics, alarms.
Noise reduction : Jump frequencies.
Safety :
Detection of fan belt breakage.
Automatic Restart, catch on the fly.
Built-in protections
Altivar 21ATV 21 Pumping functions
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ATV 21 Pumping functions.
Energy Savings :
Management of Electricity consumption.
Quadratic law command for centrifugal
pumps (Kn).
Monitoring :
Diagnostics, alarms.
Continuity of service :
Fallback position,
Automatic/manual operation.
Safety and protection of pumps :
Over-current detection.
Limitation of operating time at low speed.
Protection of pumps overheating.
Altivar 21ATV 21 Heating and Air Conditioning functions
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ATV 21 Heating and Air Conditioning functions.
Energy Savings :
Management of Electricity consumption. V/Hz Energy Saving law.
Quadratic law for centrifugal pumps.
Monitoring and safety :
Diagnostics, alarms.
Adjustment of flow rates on
the basis of actual needs. PID Regulator
Noise and resonance reduction :
Adjustable switching frequency up to
16kHz during operation.
Jump frequencies.
HVAC ApplicationsSummary
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Summary
> Introduction> HVAC Systems> Energy Savings> Altivar 21> Altivar 61> Our Markets> Conclusions
>Quiz
Altivar 61
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Altivar 61 is a range of Drives specially
designed for HVAC applications andPumping in industrial and commercial
buildings.
Power range from 0,75 to 630 KW
Altivar 61Main Features
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IP54
IP20 ATV 61 is an ideal Solution for fluid processing
installations with numerous functions for climateand hydraulic applications.
Variable Torque offer for 3-phases asynchronousmotors :
Power range from 0,75 to 630 KW
3-phases 200-240V and 3-phases 400-480V.
New range : 3-phases 690V up to 1200 KW
UL type 1 / IP20 or UL type 12 / IP54 ranges.
Class A or B EMC filters and DC Choke can be
integrated or in option depending on each size
type. International Standards and Certifications :
CE, UL, CSA, C-Tick, DNV, NOM 117, GOST,
Altivar 61Main Features
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Economical.
Special Motor Control laws to reduce the energy consumption.
Several Energy Savings laws.
Simplicity and user-friendliness.
Simply Start menu.
Macro-applications.
User-friendly dialogue tools :
Remote graphic display. Physical values (bar, l/s, C, )
Power Suite software.
Service.
Numerous built-in maintenance, monitoring and diagnostics functions.
Altivar 61Main Features
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Flexibility and performances.
Numerous integrated options to adapt the drive for advanced functions.
Configurable logic and analogue I/O.
Safety.
Protections of the motors and the drives.
Protection of the installation.
Machine and human safety.
Power Removal function to prevent motor starting accidentally
(EN954-1, category 3 and IEC/EN 61158 , SIL 2)
Installation safety.
Altivar 61Open communication - Option
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Modbus and CANOpen protocols integratedas standard.
Optional communication board for main
types of bus used in building management :
LonWorks
BACnet
METASYS N2
APOGEE FLN
Optional communication board for main types
of industrial protocols : Ethernet TCP/IP, Uni-Telway, Modbus +,
Profibus DP, DeviceNet, InterBus , Fipio.
Altivar 61Option Cards
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One or two option cards can be integratedsimultaneously.
I/O extension card.
Communication cards (see previous page)
Multi-pump card for the management of
several pumps.
Controller Inside programmable card toadapt the drive to specific customer
application.
Altivar 61Multi-Pump Card
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ControllerInside ATV61
Contactor orsoft starter
Non returnvalve
Pressuretransducer
Isolatingvalve
Optionalflow switch
Jockey / joker pump (1 only)
Optionalflow meter
Variablespeedpump
Fixed speed pump(Maximum of 3)
Altivar 61External Options
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Braking units and resistors.
DC chokes, line chokes and passive filters.
To reduce harmonics.
Additional EMC inputs filters.
Motor chokes and sinus filters.
For long cable runs.
To remove the need for shielding.
Altivar 61ATV 61 Ventilation functions.
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Energy Savings :
SVCU NOLD Energy Saving law Calculation of energy consumed.
Monitoring :
Diagnostics, alarms.
Air flow regulation. PID Regulator
Noise and resonance reduction :
Modulation on the fly of switchingfrequency.
Jump frequencies.
Safety :
Forced operation.
Smoke extraction. Built-in protections.
High inertia fans :
Automatic Restart, catch on the fly.
Braking with resistances.
Altivar 61ATV 61Pumping functions.
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Energy Savings :
Quadratic law for centrifugal pumps
Calculation of energy consumed.
Monitoring : Diagnostics, alarms.
Pressure and flow regulation.
PID Regulator Monitoring of speed reference.
Water distribution :
Multi-pumps card control.
Safety :
Detection of zero flow with a sensor.
Limitation of flow with a sensor.
Wake up / sleep function.
Under-load and overload detection.
HVAC ApplicationsSummary
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> Introduction> HVAC Systems> Energy Savings> Altivar 21> Altivar 61> Our Markets> Conclusions> Quiz
Our MarketsThe Markets we serve.
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Residential
Commercial /
Institutional /
Industrial
Customers we sell :OEMs, System Integrators, Mechanical Contractors, Building Automation Companies ...
Machines we apply solutions for (targeted applications) ...
Cooling Towers
Air Handling Units
Chillers
BoilersRooftop Units
Window
Split
Our MarketsType of Drives required.
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Centrifugal, rotary scroll, single screw and twin-screw :
Low starting torque : ATV21 or ATV61 (30 to 200hp)
Reciprocating compressors (Piston) :
Typically, 160% starting torque : ATV71 (1 to 600hp)
Fans :
Variable torque (110% Tn max) : ATV21 or ATV61
Pumps :
Variable torque (110% Tn max) : ATV21 or ATV61
HVAC ApplicationsSummary
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> Introduction> HVAC Systems> Energy Savings
> Altivar 21> Altivar 61> Our Markets> Conclusions> Quiz
ConclusionsWhy using Variable Speed Drives in HVAC applications ?
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Messages for OEM.
Save Mechanical Costs.
Get More Flexibility.
Interface with Building
Automation Systems.
International Certifications and Standards.
Easy Commissioning.
Built-in Protections.
Built-in EMC Improvements.
Best Reliability.
ConclusionsWhy using Variable Speed Drives in HVAC applications ?
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Messages for Mechanical Contractors.
Best Reliability. Less Maintenance.
Machine and Human
Safety.
International Certifications and Standards.
No Specific Electrical Knowledge.
Built-in EMC Improvements.
ConclusionsWhy using Variable Speed Drives in HVAC applications ?
M f E d
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Save your Money !
Messages for End-users.
Reduce the Operating Costs.
Save a lot of Energy.
Reduce the Maintenance Costs.
Short Payback Period of the Investments.
ConclusionsWhy using Variable Speed Drives in HVAC applications ?
M f E d
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Save your Installation !
Messages for End-users.
Reduce the Motor Wear.
Adaptation to theLoad Request.
Reduce the Mechanical Stress.
Tone Down the Starts. Built-in Protections.
ConclusionsWhy using Variable Speed Drives in HVAC applications ?
M f E d
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Improve your Performances !
Messages for End-users.
VSD
One of The Most Effective Technology in HVAC.
Interface with Building Automation Systems.
Accurate Control of Flow. Maximize Efficiency.
ConclusionsWhy using Variable Speed Drives in HVAC applications ?
M f E d
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Improve your Comfort !
Messages for End-users.
Best Accuracy.
Get More Flexibility
Reduce the Noise of Fans.
Built-in EMC Improvements.
HVAC ApplicationsSummary
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> Introduction> HVAC Systems> Energy Savings
> Altivar 21> Altivar 61> Our Markets> Conclusions> Quiz
QuizSub chapter title
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Question 1
Text question 1
Question 2
Question 3
Question 4
HVAC Applications
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uestions and Answers
Motion & Drives t ra ining
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Thanks
for your attention