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Author Question: What type of pressure control can be used for rooftop air-cooled condensers? What will be an ... (Read 23 times)

jlmhmf

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on: Jul 26, 2018
What type of pressure control can be used for rooftop air-cooled condensers?
 
  What will be an ideal response?

Question 2

How does a pulse width modulated expansion valve operate?
 
  What will be an ideal response?


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tjayeee

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Reply #1 on: Jul 26, 2018
Answer to Question 1

Cycling fans, condenser bypass, or split condensers.

Answer to Question 2

Within a period of six seconds a voltage signal from the controller will be transmitted to and removed from the valve coil. If there is a demand for refrigerant, the valve will remain open for almost all of the six seconds. If there is little demand then the valve will only stay open for a fraction of the six second period. This type of valve includes a tight shut-off function that eliminates the need for an additional solenoid valve.


jlmhmf

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Reply 2 on: Jul 26, 2018
Thanks for the timely response, appreciate it

nanny

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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