Daikin VRV-WIII User Manual download pdf (Page 18)

© 2013 Daikin North America, LLC

Slide 18 Slide 18

System

capacity

Refrigerant T

95° 77° 86° 68°

Efficiency

95° 77° 86° 68°

Outdoor temperature

Example: cooling

Fixed Rt

Capacity & Load

95° 77° 86° 68°

Cooling

requirement

Design

point

Currently on all VRF systems

Same refrigerant temperature

(Rt) throughout the season

As outdoor temperature falls, the

capacity of the system is adjusted by

reducing the speed of inverter

compressors

Reducing compressor speed improves

efficiency, but only to a certain extent:

at very low compressor speeds,

compressor efficiency actually falls

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