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49528867
Premium
join:2010-04-16
Fort Lauderdale, FL
kudos:3

1 edit

1 recommendation

reply to Cho Baka

Re: Removing Mini-split A/C-Heatpump systems

I am not going to tell you how to do it, but I will tell you how it has been done.

Close the high side valve and leave the low side valve open, run the compressor for about 45-60 seconds (you can hear the compressor load up when it is reaching the end of the process) then while the compressor is still running close the low side valve and immediately shut down the compressor.

Crack open the low side fitting and allow the pressures to equalize (chances are you will have a zero pressure or a vacuum) once that is complete remove both lines from the condenser and tape the ends of the tubing shut to preclude the entry of contaminants.

Move the unit to the new location reconnect the tubing fitting up the high side coupling nice and tight but leaving the low side coupling finger tight, slowly open the high side valve allowing refrigerant to flow into the evaporator to purge the tubing toward the low side through the loose fitting for about 10-15 seconds of flow then make up the low side coupling nice and tight.

Power the unit up and test for proper charge by noting a cool and wet low side after the unit has been cooling awhile.

Now you’re all done.

Wayne

Corrected valve error.
--
It is sobering to reflect that one of the best ways to get yourself a reputation as a dangerous citizen these days is to go about repeating the very phrases which our founding fathers used in the struggle for independence. - Charles A. Beard



printscreen

join:2003-11-01
Juana Diaz, PR
Reviews:
·Choice Cable TV
·Coqui/PRTC

said by 49528867:

Move the unit to the new location reconnect the tubing fitting up the high side coupling nice and tight but leaving the low side coupling finger tight, slowly open the high side valve allowing refrigerant to flow into the evaporator to purge the tubing toward the low side through the loose fitting for about 10-15 seconds of flow then make up the low side coupling nice and tight.

I have a mini-split unit at home that was previously at another location before it was given to me. I don't know how the process of removing the unit was done at the old location but the guy that installed it at my place used a vacuum pump to purge all air from the system before he opened the valves. I can't recall if it needed to be recharged a bit. I think it wasn't.


49528867
Premium
join:2010-04-16
Fort Lauderdale, FL
kudos:3

said by printscreen:

I don't know how the process of removing the unit was done at the old location but the guy that installed it at my place used a vacuum pump to purge all air from the system before he opened the valves.

That is the proper way of removing all air and more importantly moisture from a system that has been opened.

Wayne
--
It is sobering to reflect that one of the best ways to get yourself a reputation as a dangerous citizen these days is to go about repeating the very phrases which our founding fathers used in the struggle for independence. - Charles A. Beard


iknow

@optonline.net
reply to 49528867

said by 49528867:

I am not going to tell you how to do it, but I will tell you how it has been done.

Close the high side valve and leave the low side valve open, run the compressor for about 45-60 seconds (you can hear the compressor load up when it is reaching the end of the process) then while the compressor is still running close the low side valve and immediately shut down the compressor.

Crack open the low side fitting and allow the pressures to equalize (chances are you will have a zero pressure or a vacuum) once that is complete remove both lines from the condenser and tape the ends of the tubing shut to preclude the entry of contaminants.

Move the unit to the new location reconnect the tubing fitting up the high side coupling nice and tight but leaving the low side coupling finger tight, slowly open the high side valve allowing refrigerant to flow into the evaporator to purge the tubing toward the low side through the loose fitting for about 10-15 seconds of flow then make up the low side coupling nice and tight.

Power the unit up and test for proper charge by noting a cool and wet low side after the unit has been cooling awhile.

Now you’re all done.

Wayne

Corrected valve error.

that is the way homeowners were allowed to do it years ago, now it's called releasing an ozone depleter into the atmosphere, as you'll lose some freon into the air. the OP didn't want to buy any.


49528867
Premium
join:2010-04-16
Fort Lauderdale, FL
kudos:3

said by iknow :

that is the way homeowners were allowed to do it years ago, now it's called releasing an ozone depleter into the atmosphere, as you'll lose some freon into the air.

Yes and that pony has been well beaten.

Wayne
--
It is sobering to reflect that one of the best ways to get yourself a reputation as a dangerous citizen these days is to go about repeating the very phrases which our founding fathers used in the struggle for independence. - Charles A. Beard