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Author Question: Using the chart in Figure 92-17, what problems can cause both a high superheat and a high ... (Read 32 times)

audie

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on: Jul 26, 2018
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?


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Toya9913

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Reply #1 on: Jul 26, 2018
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

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Reply 2 on: Jul 26, 2018
YES! Correct, THANKS for helping me on my review

bulacsom

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Reply 3 on: Yesterday
Excellent

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