eFlex™ Variable Speed Scroll Sounds

A factory installed sound enclosure is provided with eFlex variable speed scrolls in 40-70T Ipak units. Variable speed scrolls sound much different from fixed speed scrolls. This becomes obvious when the sound enclosure is opened for service. To assist with troubleshooting, sample sound recordings of a normal eFlex Variable Speed Scroll are provided below. The first four sound recordings are with the sound enclosure open. Condensers fans and other compressors are off. The last recording demonstrates that the variable speed compressor is barely audible even at maximum speed when the sound enclosure is installed. Condenser fans are the dominate sound.

*For highest sound quality, use headphones when listening to audio files.

Variable Speed Compressor Sounds 

 

Audio files recorded with: variable speed compressor with sound enclosure open and no other compressors or condenser fans running

1500 RPM, 45 Evap/ 100 Cond (ºF)
This is the eFlex compressor at the lowest speed on a mild day
1500 RPM, 45 Evap/ 135 Cond (ºF)
This is the eFlex compressor at the lowest speed on a hot day
4500 RPM
This is the eFlex compressor at typical mid-range speed
6000 RPM
This is the eFlex compressor at the highest speed

 

Audio files recorded with: variable speed compressor with sound enclosure installed, no other compressors running, and all condenser fans running

6000 RPM