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Author Question: What is the function of an air flow switch on a packaged air handler? What will be an ideal ... (Read 76 times)

aabwk4

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on: Jul 26, 2018
What is the function of an air flow switch on a packaged air handler?
 
  What will be an ideal response?

Question 2

A system in a 90F room is charged to 100 psig with nitrogen to perform a standing pressure test. When the system pressure is checked later, the room temperature is 70F. What pressure would you expect to see in the system?
 
  What will be an ideal response?


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uniquea123

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

This snap action switch verifies that the fan is either on or off.

Answer to Question 2

(Note: the units are rounded) 100 + 15 = 115 psia
90 + 460 = 550Rankine

70 + 460 = 530Rankine

115 psia x


aabwk4

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Reply 2 on: Jul 26, 2018
Excellent

blakcmamba

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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