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What is the proper operating pressure on a 4ton ductible split…

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What is the proper operating...
What is the proper operating pressure on a 4ton ductible split Freon 410 Goodman Brand?
And how could i get some manuals for my tech on this brand new freon 410 system?
Submitted: 8 years ago.Category: HVAC
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Answered in 37 minutes by:
6/25/2010
HVAC Technician: Mr. Jeff Pearson, Mechanical Engineering Technologist replied 8 years ago
Mr. Jeff Pearson
Mr. Jeff Pearson, Mechanical Engineering Technologist
Category: HVAC
Satisfied Customers: 155
Experience: 25 years as Refrigeration Contractor,
Verified

195 psig seems a little high for the back pressure, that coresponds to a 79 deg F suction temp.

What was the superheat at that pressure?

What amount of sub-cooling did you have at 410 psig?

 

I would just be guessing without at least those two bits of info.

 

Jeff Pearson

 

Here are a few good links for R410A split system information

http://www.docs.hvacpartners.com/idc/groups/public/documents/marketing/811-20066.pdf

 

http://www.achrnews.com/Articles/Service_and_Maintenance/bd5a903260d5a010VgnVCM100000f932a8c0____

 

Here is a Pressure Temperature chart

graphic

 

 



Edited by Mr. Jeff Pearson on 6/25/2010 at 9:26 AM EST
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HVAC Technician: Mr. Jeff Pearson, Mechanical Engineering Technologist replied 8 years ago

Also, if you could, please measure the temperature drop across the evap coil when running at these conditions. So if I had to guess, I would say it looks like the system is undersized.

 

Jeff P.

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