Expanded offering provides for more efficient solutions
Inverter compressors versus fixed or digital scroll The new inverter offering for RoofPak systems is at the forefront of HVAC compressor technology. New or replacement RoofPak units with inverter compressors drastically increase energy efficiencies and lower operating costs when compared to rooftop units using standard efficiency fixed or digital scroll compressors.
Inverter advantages over fixed speed compressors:
• Lower inrush current• Increased compressor life
• Reduced space temperature fluctuations
• Superior dehumidification control
• Prevents dry coil/condensate re-evaporation and decreases space latent load
Inverter advantages over digital scroll compressors:
• Modulates motor speed to deliver setpoint (no fully loaded/unloaded operation)
• Motor does not run at full speed during unloaded operation
• Significant noise reduction
The inverter compressor difference A Daikin variable speed inverter compressor with permanent magnet motor enhances energy efficiency at full-load as well as at part-load operation. In addition, the variable speed inverter compressor modulates, delivering only the required energy to satisfy space conditions. This provides building owners with superior temperature and humidity control as well as exceptional energy savings.
Rooftop air conditioning efficiency is measured by two rating metrics – IEER (integrated energy efficiency ratio) for part-load operation where equipment operates at 98% of the time, and EER (energy efficiency rating) for full-load operation where equipment operates at 2% of the time. Since most of the operating hours are under part load conditions, it makes sense that cus-tomers should be most concerned about part-load efficiencies that occur during 98% of the equipment’s operating time.
RoofPak units w/inverter compressors provide 58% better IEER than current standard efficiency compressors and ASHRAE’s 90.1 (2010) standard, and 97% better than the ASHRAE 90.1 (2000) standard.
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ASHRAE 90.1 2000Compliant Unit
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Standard Ef�ciencyASHRAE 90.1 2010
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IEER
97%
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To illustrate total energy savings, consider the following criteria detailing a Daikin 50-ton RoofPak VAV unit with vari-able speed inverter compressor technology versus a standard efficiency ASHRAE 90.1 (2010) compliant cooling only unit, as well as an older/vintage unit. To learn more about how RoofPak with advanced inverter technology can add to your energy savings and lower operating costs, contact www.DaikinApplied.com.
RoofPak Units with Inverter Compressors Increase Energy Savings
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20000
40000
60000
80000
100000
120000
140000
160000
Standard E�ciencyASHRAE 90.1 2010 Compliant Unit
RoofPak Variable Speed Inverter Compressor Unit
Older/Vintage Unit
Annu
al En
ergy C
onsu
mptio
n (kW
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RoofPak is an ideal rooftop solution for applications like schools, large office buildings, health care facilities, hotels, casinos, and data centers. RoofPak units are also configurable for 100% dedicated outdoor air, VAV, single-zone VAV, or CAV systems.
The REAL measurement criteria for Rooftop efficiencies
To learn more about RoofPak with advanced inverter compressor technology, contact your local Daikin Applied sales office or visit www.DaikinApplied.com to find an office near you.
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