How To Draw Refrigerant Into Condenser
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Pulling refrigerant into condensing unit
The guys I work with have differing opinions on pulling the refrigerant back into the condensing unit for quick repairs. This is concerning only residential split units. Not heat pumps. ii to 5 ton units. One question is well-nigh prophylactic. If the organisation has a extra long line set can it be dangerous to pull all the refrigerant back into the condensing unit of measurement? As well, in full general, my stance is that it is best to recover the refrigerant. That way you know how much was in the organisation to start with plus information technology is better with these small units to simply employ new clean refrigerant. Any feedback would exist appreciated. Thanks.
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If I don't suspect a accuse problem, so I'll pump back what I can before the compressor internally bypasses then recover the rest.
If I suspect in that location's something up with the accuse and so I have it all out. Especially if the factory installed drier is all the same in the condenser.
Really for me is a case by instance footing.
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Newer ringlet will become into bypass if condenser is full, older units you have to watch the amps and heed to the unit. Once unit is full close service valves and recover remaining line set. 95% of time a properly charged unit of measurement with a reasonable line set will pump into condenser without a trouble. I've pumped hundreds of units into condenser to replace indoor coils, supplant leaking driers and repair minor leaks in lines. If I have a large leak on a ringlet or line ready I never pump the unit into condenser, just to avert possibility of pulling not condensables into the organization. If the system was so depression that the suction side was pulling into vacuum with system running you should recover the organization just to exist condom.
- X2 i pump into the condenser until the depression pressure switch cuts out then recover.
Originally Posted past ryan1088 
If I don't suspect a accuse trouble, then I'll pump back what I can before the compressor internally bypasses so recover the rest.
If I suspect there'due south something up with the charge then I accept it all out. Specially if the factory installed drier is still in the condenser.
Really for me is a instance by case basis.
I thing i have always heard is that it can damage the curlicue tips once you get below 20psi. Is this true because i have gone on calls where scrolls have pulled a vacuum due to restrictions simply after i correct the upshot and recharge these compressors have nonetheless kicked for years.
- I've had pretty good luck with non doing damage nether twenty psi for a short menstruum of time. The couple that I know for a fact died from running in a vacuum, ran that way for an unknown amount of time. Originally Posted by Barrettservices
X2 i pump into the condenser until the low force per unit area switch cuts out so recover.
One thing i take always heard is that it tin can damage the gyre tips in one case you lot get below 20psi. Is this true because i take gone on calls where scrolls accept pulled a vacuum due to restrictions merely after i right the event and recharge these compressors take all the same kicked for years.
- Thank you. Thats kinda what i figured. Originally Posted by ryan1088
I've had pretty good luck with not doing damage under xx psi for a short period of time. The couple that I know for a fact died from running in a vacuum, ran that way for an unknown amount of time.
- Thank you. Thats kinda what i figured. Originally Posted by ryan1088
I've had pretty practiced luck with non doing impairment under 20 psi for a short period of time. The couple that I know for a fact died from running in a vacuum, ran that way for an unknown amount of fourth dimension.
Source: https://hvac-talk.com/vbb/threads/1258881-Pulling-refrigerant-into-condensing-unit
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