Using the chart in Figure 92-17, what problems can cause both a ...

[audie]

Using the chart in Figure 92-17, what problems can cause both a high superheat and a high subcooling?
 
  What will be an ideal response?

Question 2

What is the advantage to variable frequency drive motors?
 
  What will be an ideal response?

[Toya9913]

Answer to Question 1

Liquid Restriction Underfeeding metering device Low Capacity Compressor

Answer to Question 2

With conventional rack systems, parallel compressors are turned on and off by a control system and this cycling leads to a high current inrush each time a compressor starts. This starting and stopping will also lead to wear and tear on the compressors. In comparison, rack systems that use a VFD for motor speed control can adjust the compressor capacity throughout a wide range of demand that limits cycling, decreases power consumption, and increases the useful life of the compressor.

[audie]

Excellent

[vickyvicksss]

Thanks for the timely response, appreciate it