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AC to EC Fan Upgrade for APAC S60 Evaporator Fan

The building’s air conditioning system consists of two air package-type air-conditioners. The old AC fans were replaced with two ebm-papst fan boxes.
Picture

Background

Computer Cool, a Melbourne-based contracting firm, have recently completed an EC fan upgrade of an APAC S60 split-type commercial air conditioner in a commercial building in Blackburn, Victoria. The trial was conducted to analyse the effectiveness of the replacement of conventional, AT15/15 belt-driven forward-curved fans with new ebm-papst EC direct-drive backward-curved fans into APAC S60, S75 and S85 series airconditioning units.

Verification
The building’s air conditioning system consists of two APAC S60 air package-type air-conditioners. The old AC fans (pictured above) were replaced with two ebm-papst BF500RC-002 fan boxes. Monitoring equipment was connected to the unit before and after the replacement fans were installed. Seven measuring points monitored temperature, pressure and current draw 5 days before and after the fan replacement.

Results 
The results show that the new EC direct drive fans operate with 41% reduced energy usage at the same capacity.* 
The upgrade lead to a 41% reduction in input current, with the old fan consuming 7.1A and the new EC fan using 4.2A in input current. The cooling capacity and airflow remained unchanged, and this was confirmed by static pressure and room air temperature readings.
*Calculated average across the monitoring period.

Further benefits of EC Upgrades 
Alarm capability
  • ​EC fans can be connected to the unit’s general alarm, and have the ability to communicate to building management systems via high-level interface.
Reduced maintenance
  • ebm-papst EC Fans are direct-drive fans and therefore do not need belts, pulleys or other equipment to speed control, further reducing operation costs.
Picture
The new EC direct drive fans operate with 41% reduced energy usage at the same capacity.
The ebm-papst BF500-RC-002 fan box
The old belt-driven AC fan before replacement with EC direct-drive fans
The new ebm-papst BF500RC-002 EC fan boxes going in
The ebm-papst EC RadiCal centrifugal fan that is used in the BF500RC-002 fan boxes.
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About
EC Upgrades is a business unit of ebm-papst A&NZ Pty Ltd. The ebm-papst group are a leading global manufacturer and supplier of fans, blowers and air moving products. We provide a unique range of fans and blowers that are typically used throughout buildings. Our EC, high efficiency fans are standard in the market and are used where end users wish to reduce their running costs and improve equipment lifetimes.
ebm-papst A&NZ
10 Oxford Road
Laverton North VIC 3026
Tel: 03 9360 6400
www.ebmpapst.com.au
ecupgrades@au.ebmpapst.com