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ApplianceGuru.com: The Samurai Appliance Repair Forums > Do-It-Yourself Appliance Repair Help > The Kitchen Appliance Repair Forum > compressor install questions |
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| Moderated by: BrntToast, RegUS_PatOff, appl.tech.29501 | Search Our Sites for More Info! |
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| compressor install questions | Rate Topic |
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| Posted: Tue Jun 5th, 2007 01:18 am |
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1st Post |
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jagrider91 Senior Apprentice Appliantologist
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I know how to install a compressor as far as brazing one in can any one tell me how to vacum and recharge a simple frigidaire top mount ref including guage hookup. And how to fill and use a charging cylinder? Thanks IN advance
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| Posted: Tue Jun 5th, 2007 01:42 pm |
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2nd Post |
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AccApp Fellow, Academy of Sublime Masters of Appliantology 
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Copied from a reply to an earlier question: After performing the repair I attach an access valve to the process side of the compressor and the filter/driers I use have a double-sided inlet with an access valve on one end already. I hook up the blue hose to the process side and the red hose to the filter-driers access port. I then hook up my Robinair 6 cfm vacuum pump to the big hose on my 4-way manifold and the ref port gets the electronic vacuum gauge. I open all valves and check the blue gauge for proper suck-down and the vacuum pump's exhaust port for gross leaks. After 5 minutes at the blue gauge's lowest point I turn on the "micron" gauge and see where it's at. When it's under 1500 I turn on the system's compressor to ensure no pockets of atmosphere/moisture are hiding. When it reads 500 or less I turn off the valve to the pump and shut it off. If it holds under 500 for 5 minutes I shut the red and blue side valves, open the vac pump port, unhook the "micron" gauge, hook up the hose to the charging cylinder and vacuum that hose out for at least a minute. Then the vac valve gets shut, the blue valve is opened and the charge is allowed into the system as a vapor. After monitoring the pressures for a bit, the ref valve is closed and the hose to the f/d is removed. I use Qwik-Seals on the end of the blue and red hoses so the refrigerant cannot escape. Then the red valve is opened and I wait for pressure to equalize before removing the blue hose and capping the access ports. Then I try to get all the stuff back into my SS bag so I can close the zipper. Thanks for reading this, I know it's alot. The compressor cannot evacuate a system by itself, sweep-charging is asking for trouble. Since I have codified this method I do not believe I have experienced a contamination-related failure from any work I have performed. If you have the proper tools and use this method you cannot fail. Except when you get a bad compressor right out of the box. Frig tech Guy told me I should test them before I install them. I do now.
____________________ "When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle. http://www.fixitnow.com/beerfund.htm |
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| Posted: Tue Jun 5th, 2007 01:52 pm |
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3rd Post |
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AccApp Fellow, Academy of Sublime Masters of Appliantology
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jagrider91 wrote: And how to fill and use a charging cylinder? Filling is the easy part, get as short a hose as possible and connect the refrigerant cylinder's outlet valve to the hose and the other end to the bottom valve of the charging cyl. If the cyl has never been filled, I'd evacuate it and the hose first. Then open the lower and refrigerant cyl valves and throttle open the upper valve until you see liquid ref bubbling up the sight glass. Let it fill the desired amount and shut off all open valves. If it is a regular refrigerant cylinder turn it upside down so liquid comes out, if you have a cyl of R414a it has a dip tube so liquid flows when right side up. The refrigerant cyl will be marked.
____________________ "When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle. http://www.fixitnow.com/beerfund.htm |
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| Posted: Wed Jun 6th, 2007 03:28 am |
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4th Post |
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jagrider91 Senior Apprentice Appliantologist
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How do you use a charging cylinder as far as setting up a charge for domestic r-134 systems? and why is there a plug on charging cylinder? Thanks
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| Posted: Wed Jun 6th, 2007 11:02 am |
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5th Post |
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AccApp Fellow, Academy of Sublime Masters of Appliantology
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Which charging cyl do you have? The plug is for a heater which increases the pressure.
____________________ "When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle. http://www.fixitnow.com/beerfund.htm |
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| Posted: Wed Jun 6th, 2007 11:40 am |
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6th Post |
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jagrider91 Senior Apprentice Appliantologist
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it is a robonoir 134a cylinder. Having trouble filling it also any tricks. thanks George
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| Posted: Wed Jun 6th, 2007 07:45 pm |
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7th Post |
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nickfixit Fellow, Academy of Sublime Masters of Appliantology 
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Are you asking about using a Dial-A-Charge charging system? Nick
____________________ " Giving numerical data to Sears management is like giving a monkey a machine gun. No one knows for certain what will happen, but you can be sure of two things... It will be real messy, and only the monkey will be unharmed" |
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| Posted: Wed Jun 6th, 2007 11:05 pm |
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8th Post |
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jagrider91 Senior Apprentice Appliantologist
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yes
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| Posted: Thu Jun 7th, 2007 12:33 am |
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9th Post |
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BrntToast Fellow, Academy of Sublime Masters of Appliantology 
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to fill you need to reduce pressure in cylinder, stick it in a freezer before filling, or vent a lil bit of vapor(doubt this way is legal where you are) or stick the 134 tank in a pail of hot water to increase its pressure... thats also the good way to get the last lil bit from the tank without having to hook up your reclaimer
____________________ The only stupid question is the one not asked hope i've been helpfull, if you wish to buy Brnt beer kick here http://brnttoast.googlepages.com/home feel free to prvt msg frigidaire questions my way (i dont log in every day) |
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| Posted: Thu Jun 7th, 2007 12:50 am |
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10th Post |
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jagrider91 Senior Apprentice Appliantologist
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thanks for the help how do you measure a charge to dump ?
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| Posted: Thu Jun 7th, 2007 01:10 am |
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11th Post |
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AccApp Fellow, Academy of Sublime Masters of Appliantology
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You'll see the level of liquid through the sight glass. Look at the pressure on the gauge on top and "dial" the outside chart to the pressure. Use the black o-ring as a marker of where you started and allow refrigerant into the system until the correct amount has been dispensed. It is much easier to learn something of this nature first-hand. Can you observe an experienced tech?
____________________ "When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle. http://www.fixitnow.com/beerfund.htm |
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| Posted: Thu Jun 7th, 2007 10:50 am |
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12th Post |
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jagrider91 Senior Apprentice Appliantologist
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thanks .i have believe it or not went for a crash course in laconia for the whirlpool school but forgot and now i am doing factory work on my own and they require sealed systems.
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| Posted: Sun Jun 10th, 2007 12:30 am |
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13th Post |
Scottthewolf
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Frigidaire has a DVD course on refrigeration service. The part number is 5304454883. Last edited on Sun Jun 10th, 2007 07:18 pm by ____________________ Scott Wolf |
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| Posted: Sun Jun 10th, 2007 01:13 am |
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14th Post |
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jagrider91 Senior Apprentice Appliantologist
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got that dvd but kind of vague
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