Results 1 to 28 of 28
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20-06-2007, 01:47 AM #1
I just want a critique of my work to see if it meets the grade!
Well this is the first major retrofit project that I've don, the unit was originally an air cooled R-12 unit running R-401B for a walk in cooler. The original condenser, due to years of neglect was beyond recovery. Due to the coast being usually neglectful of equipment and with out any A/C I decided to make it water cooled, as this offers an easy way to expand it with the ability for re-using waste heat.
Any case here it is and tell me where or what needs improvment! Keep in mind this isn't installed on a system hence no F/D to be seen!
It will be run with R-134a and the old oil has all ready been drained!Last edited by The MG Pony; 09-11-2007 at 07:00 PM.
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20-06-2007, 01:50 AM #2
Re: I just want a critique of my work to see if it meets the grade!
By the way it is my camera that sucks, the unit doesn't look the bad in real life! But it should be clear enough for a technical aspect.
Last edited by The MG Pony; 09-11-2007 at 06:59 PM.
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20-06-2007, 02:57 AM #3
Re: I just want a critique of my work to see if it meets the grade!
You need to get a tubing bender.
I would be very careful of placing cap tube lines to pressure switches close to other hard metal objects (like the compressor base). The copper will eventually get bumped close to that and rub through creating a leak.
Otherwise, I would say you are learning. Hang in there.If all else fails, ask for help.
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20-06-2007, 04:11 AM #4
Re: I just want a critique of my work to see if it meets the grade!
Ok so put in some foam or silicon suports should help stop that?
Oh and bty I did use a tubing bender! I just didn't think it through as theroughly as I should have lol.
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20-06-2007, 04:43 AM #5
Re: I just want a critique of my work to see if it meets the grade!
You can use some rubber tape that electricians use for splices. It is sticky on one side. Put a couple of rolls around the cap tube and anchor it to something solid.
I'm sorry, but there was one line that looped up and around that looked like it just came off of a roll of copper.
Getting the technical part right is only a portion of the job. What people see is your handiwork, they don't have to understand anything else, except if the system produces cold.
Nice level lines where appropriate with properly radiused turns and things anchored properly shows you care.
I'm not trying to be difficult or too hard on you, but workmanship is something the old guys beat into the younger guys. Been there, done that!If all else fails, ask for help.
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20-06-2007, 08:12 AM #6
Re: I just want a critique of my work to see if it meets the grade!
ya, that long loop is to help diffuse the kicks on start up from stressing the joints, after making it I realized I could have don better, but like I said its my first and a learning step, and thanks for the replies they help, certainly taking notes and will implement suggestions.
Making them fresh is easier IMO, trying to work around the origional lay out is tuff!Last edited by The MG Pony; 20-06-2007 at 08:14 AM.
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20-06-2007, 09:35 AM #7
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20-06-2007, 09:53 AM #8
Re: I just want a critique of my work to see if it meets the grade!
No most certainly not, they are don with 15% silfoss, the water plumbing is don with some generic silver baring soft solder.
Tommorow when it is sunny (If it is ) I'll drag the unit out so I can get clearer pics for ya.
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20-06-2007, 09:54 AM #9
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20-06-2007, 10:06 AM #10
Re: I just want a critique of my work to see if it meets the grade!
The wood supports/brackets: try to bend an aluminum or stainless steel plate.
I never bend tubes with my hands, allways a bender, even those of 1/4"
For the capaillary lines, you can make it much nicer with the capillary tubes you make yourself like those of Reflex we're using.It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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20-06-2007, 10:09 AM #11
Re: I just want a critique of my work to see if it meets the grade!
http://www.refflex.com/frame_e/frame_e_index.htm
This is their websiteIt's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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20-06-2007, 01:43 PM #12
Re: I just want a critique of my work to see if it meets the grade!
Peter,
I really like those hoses you posted the link for. They look like hydraulic hoses and fittings, which is what I used to use. These work much better than the standard method refrigeration people normally use.
Thanks for posting that!If all else fails, ask for help.
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20-06-2007, 05:53 PM #13
Re: I just want a critique of my work to see if it meets the grade!
Ok but what to do of the stuff that the cap tube is brazed into that does not give you the option of alternitives? I often use a tank as a mold to shap my cap coils. Looks like it will be sunny later in the day so I'll take the unit out into the light and try and get better quality pictures for you.
Hope fully thees picks are better.Last edited by The MG Pony; 09-11-2007 at 07:00 PM.
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20-06-2007, 07:56 PM #14
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20-06-2007, 08:03 PM #15
Re: I just want a critique of my work to see if it meets the grade!
Water source is what ever they decide, My sujestion was to connect it to a large out door radiator and then just connect all equipment to that with a divertion valve to enable the heat to be recycled to the indoor building. As you can imagin it can get rather chilley here on the coast at times.
In all likenes they will opt for open loop for now.
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20-06-2007, 08:21 PM #16
Re: I just want a critique of my work to see if it meets the grade!
Originally Posted by The MG Pony
I always used stainless steel hydraulic tubing and stainless steel fittings (and a tubing bender). I NEVER had any leaks or broken cap tubes.
And... You do NOT have to be concerned with stupid broken flares.
Here is what I used...
http://www.swagelok.com/downloads/we.../MS-01-140.PDF (+/- 5 MB)If all else fails, ask for help.
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20-06-2007, 08:36 PM #17
Re: I just want a critique of my work to see if it meets the grade!
Ok you guys lost me, I can certainly see where such things would yeild great advantage, I'm just not seing it in this perticuler application. Water side perhaps? My main goal is to limmit any thing screwed togeather, as in I aim for every thing to be sealed, welded, brazed or soldered. Where this can not be don I try and limmit the number of machanical interconects to the minimum
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21-06-2007, 08:36 AM #18
Re: I just want a critique of my work to see if it meets the grade!
Hi Iceman You hit in one the best I used to use a lot of swedgelock and never had a failure, ive seen many a flare which were disgraces, some service techs take the easy way out they dont know what the sharp thingy on the tube cutters is for
Regards Toosh
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21-06-2007, 02:05 PM #19
Re: I just want a critique of my work to see if it meets the grade!
Originally Posted by TooshIf all else fails, ask for help.
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21-06-2007, 02:07 PM #20
Re: I just want a critique of my work to see if it meets the grade!
Speaking of pipe reamers. Imperial used to make a round handheld reamer that was much easier to use than the ones on the tubing cutters. It fits right in the palm of your hand.
If all else fails, ask for help.
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21-06-2007, 07:25 PM #21
Re: I just want a critique of my work to see if it meets the grade!
Call me odd but I like the simple ones on the pipe cutters better, perhaps I just had a crappy round one.
Ok for the cap tube suports I have some high density nylone I could make some stand offs with.
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21-06-2007, 07:41 PM #22
Re: I just want a critique of my work to see if it meets the grade!
Here's a link to the handheld reamers. These are a lot easier to use than the ones on the tube cutters.
https://www.flowline.net/default.asp...itemcode=208-F
and here are some links to tubing benders.
First a gear type bender:
http://www.newmantools.com/imperial/tb7.html
and next, a lever type tube bender:
http://www.newmantools.com/imperial/tb4.html
They also used to make a three-in-one bender for up to 3/8" inch. I think they were 1/4", 5/16", and 3/8" or something like that.
Having the proper tools makes all the difference in the finished product.If all else fails, ask for help.
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21-06-2007, 09:05 PM #23
Re: I just want a critique of my work to see if it meets the grade!
While we are on the subject of benders, Swagelok has a excellent manual on bending tubing. http://www.swagelok.com/downloads/we...N/MS-13-43.PDF
I did not think I needed it until I started running Stainless tubing across walls in a clean room. Having 10 tubes in a rack and trying to keep them parallel was a lot of fun. The offset bend information is very good.
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21-06-2007, 09:05 PM #24
Re: I just want a critique of my work to see if it meets the grade!
Check out the swivel head one on this page...
http://www.gunk.com/general_tools.asp
If you have not used one before then I suggest you try it.
p.s. the relay in the electric box is sitting side ways.
Also, cut down the height of the discharge cos some thing will catch it and snap it off.
Why is the comp not bolted down?
ChillinLast edited by chillin out; 21-06-2007 at 09:09 PM.
IF AT FIRST YOU DON`T SUCCEED.
DESTROY ALL EVIDENCE THAT YOU TRIED!
and go get a cuppa
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21-06-2007, 09:28 PM #25
Re: I just want a critique of my work to see if it meets the grade!
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21-06-2007, 09:36 PM #26
Re: I just want a critique of my work to see if it meets the grade!
Nice manual NH3. As for thoughs other products some day when I have money I'll definitely try some out.
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21-06-2007, 10:09 PM #27
Re: I just want a critique of my work to see if it meets the grade!
Originally Posted by The MG PonyIf all else fails, ask for help.
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21-06-2007, 10:14 PM #28
Re: I just want a critique of my work to see if it meets the grade!
Originally Posted by NH3LVR
This is one of those subjects that takes a while to figure out on your own. It does take some time and skill to make these tubing jobs turn out, but once completed they sure do look nice!If all else fails, ask for help.
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