Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 06-20-2013, 11:09 PM   #16
Experienced HVAC Tech
 
HVAC1000's Avatar
 
Join Date: Dec 2012
Location: Northern Colorado
Posts: 357
Share |
Default

Recovery Machines.


Quote:
Originally Posted by Doc Holliday

not if there's not any refrigerant in the system which defeats the need of a pump down in the first place so yes, you do, otherwise the refrigerant in the line set outside of the condenser service valves (if closed) will escape to atmosphere.

am I missing something?
Yes you are, now just go to any supply house, have you really never seen these basic tools. Every other tech has at least one core removing tool to change out cores without loosing system charge. I have two so I can pull from both sides at once with less restrictions. I didn't think they were that new of a tool

HVAC1000 is offline   Reply With Quote
Old 06-20-2013, 11:11 PM   #17
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,611
Default

Recovery Machines.


as always it's my pleasure learning from you, Obe-one Kenobi, but let's hypothesize a different scenario. Can you pump down down a system, close the valves thus trapping the refrigerant in the compressor and recover through one side quicker, obviously after opening whichever side you chose to recover from, then from an open system? would there be any benefit to doing as such and mind you this si with the cores in place.

I'm assuming if I pumped down, removed the cores and then hooked up it'd be faster then how I went about it with the cores seeing as how there's more release room without the cores but would a pump down and pressurized release be better?

I confused myself. Of course a pump down and then no cores recover would be quickest, right?
__________________
Thanks.
Doc Holliday is offline   Reply With Quote
Old 06-20-2013, 11:13 PM   #18
Experienced HVAC Tech
 
HVAC1000's Avatar
 
Join Date: Dec 2012
Location: Northern Colorado
Posts: 357
Default

Recovery Machines.


Quote:
Originally Posted by Doc Holliday
as always it's my pleasure learning from you, Obe-one Kenobi, but let's hypothesize a different scenario. Can you pump down down a system, close the valves thus trapping the refrigerant in the compressor and recover through one side quicker, obviously after opening whichever side you chose to recover from, then from an open system? would there be any benefit to doing as such and mind you this si with the cores in place.

I'm assuming if I pumped down, removed the cores and then hooked up it'd be faster then how I went about it with the cores seeing as how there's more release room without the cores but would a pump down and pressurized release be better?

I confused myself. Of course a pump down and then no cores recover would be quickest, right?
Just recover without the cores using the core removing tool
HVAC1000 is offline   Reply With Quote
Old 06-20-2013, 11:16 PM   #19
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,611
Default

Recovery Machines.


Quote:
Originally Posted by HVAC1000 View Post
Yes you are, now just go to any supply house, have you really never seen these basic tools. Every other tech has at least one core removing tool to change out cores without loosing system charge. I have two so I can pull from both sides at once with less restrictions. I didn't think they were that new of a tool
in 12+years I've never had one. heard of them but never paid attention to their focus. I guess it's main adjacent function is for recovery, right, as in when a compressor is locked or burned out?
__________________
Thanks.
Doc Holliday is offline   Reply With Quote
Old 06-20-2013, 11:18 PM   #20
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 24,732
Default

Recovery Machines.


Quote:
Originally Posted by Doc Holliday View Post
as always it's my pleasure learning from you, Obe-one Kenobi, but let's hypothesize a different scenario. Can you pump down down a system, close the valves thus trapping the refrigerant in the compressor and recover through one side quicker, obviously after opening whichever side you chose to recover from, then from an open system? would there be any benefit to doing as such and mind you this si with the cores in place.

I'm assuming if I pumped down, removed the cores and then hooked up it'd be faster then how I went about it with the cores seeing as how there's more release room without the cores but would a pump down and pressurized release be better?

I confused myself. Of course a pump down and then no cores recover would be quickest, right?

No, that would take longer.

CRTs are for replacing cores that leak with out having to recover, and to remove the cores for quicker recovering, and for quicker vacuuming.
__________________
When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
beenthere is offline   Reply With Quote
Old 06-20-2013, 11:19 PM   #21
Experienced HVAC Tech
 
HVAC1000's Avatar
 
Join Date: Dec 2012
Location: Northern Colorado
Posts: 357
Default

Recovery Machines.


Quote:
Originally Posted by Doc Holliday

in 12+years I've never had one. heard of them but never paid attention to their focus. I guess it's main adjacent function is for recovery, right, as in when a compressor is locked or burned out?
That and if you just want to replace cores without pumping down also let's you pull a vacuum a lot faster.
HVAC1000 is offline   Reply With Quote
Old 06-20-2013, 11:25 PM   #22
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,611
Default

Recovery Machines.


strange how I've never really recovered a system in all my time in this trade. no, I'm not bragging about it, I actually feel kinda like a hack, but it is what it is and I thank you guys for the help.
__________________
Thanks.
Doc Holliday is offline   Reply With Quote
Old 06-20-2013, 11:29 PM   #23
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,611
Default

Recovery Machines.


Quote:
Originally Posted by HVAC1000 View Post
That and if you just want to replace cores without pumping down also let's you pull a vacuum a lot faster.
my usual is pump down, remove cores, braze what needs brazing, nitrogen pressure test without cores, remove gauges from service ports without cores to allow any trash to escape, install cores and then vacuum.

now if it's a compressor change out then the same but with the valves open. I pressure test without the cores and dump the junk, then install the cores and vacuum. but I'm guessing this tool makes a substantial difference if for nothing else in saving time...????
__________________
Thanks.
Doc Holliday is offline   Reply With Quote
Old 06-20-2013, 11:36 PM   #24
Experienced HVAC Tech
 
HVAC1000's Avatar
 
Join Date: Dec 2012
Location: Northern Colorado
Posts: 357
Default

Recovery Machines.


Quote:
Originally Posted by Doc Holliday

my usual is pump down, remove cores, braze what needs brazing, nitrogen pressure test without cores, remove gauges from service ports without cores to allow any trash to escape, install cores and then vacuum.

now if it's a compressor change out then the same but with the valves open. I pressure test without the cores and dump the junk, then install the cores and vacuum. but I'm guessing this tool makes a substantial difference if for nothing else in saving time...????
For sure. I used to do it with cores in. Then tried with the tool and it was so much faster. The first few times I charged a system after removing cores I kept over charging them because it was so quick. Then I learned I might want to do that part with cores in to get better accuracy
HVAC1000 is offline   Reply With Quote
The Following User Says Thank You to HVAC1000 For This Useful Post:
Doc Holliday (06-21-2013)
Old 06-21-2013, 05:02 AM   #25
Member
 
biggles's Avatar
 
Join Date: Jan 2008
Location: Long Island
Posts: 3,621
Default

Recovery Machines.


hot recovery tank killed you on time right off,what ever happened to 15lb tanks with a vacuum on them go right for the LL without the machine and 2 hoses are a must.
biggles is offline   Reply With Quote
Old 06-21-2013, 03:33 PM   #26
Member
 
Join Date: Oct 2011
Location: North Carolina
Posts: 205
Default

Recovery Machines.


and get the valve core tool with the ball valve. Its a lot better than the one with the screw type cut-off.
Patrick Eubanks is offline   Reply With Quote
The Following User Says Thank You to Patrick Eubanks For This Useful Post:
HVAC1000 (06-21-2013)
Old 06-21-2013, 04:30 PM   #27
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,611
Default

Recovery Machines.


Quote:
Originally Posted by biggles View Post
hot recovery tank killed you on time right off,what ever happened to 15lb tanks with a vacuum on them go right for the LL without the machine and 2 hoses are a must.
plus I had a restricted filter internal to the condenser, before the service ports. the one line was pulling overtime!

I have extra hoses, they're just on my personal truck...
__________________
Thanks.
Doc Holliday is offline   Reply With Quote
Old 06-21-2013, 04:47 PM   #28
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 24,732
Default

Recovery Machines.


You need one or two of thee then.

http://www.bing.com/images/search/?q...50cdeb1&rxc=12

__________________
When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
beenthere is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
heat recovery ventilator retrofit? longshanks HVAC 6 02-22-2013 03:00 PM
Windows XP recovery console lifestooshort81 PC Repairs & Upgrades 18 01-16-2013 12:12 PM
How to remove compressor from cooler? nicksab HVAC 33 08-23-2011 05:52 AM
Geothermal recovery against house foundation dirtman HVAC 0 01-05-2011 01:54 PM
purchase new recovery unit wetbar HVAC 1 06-07-2009 07:11 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.