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Posted by KJPRO on August 21, 2008, 11:28 pm
> KJPRO wrote:
>>>
>>>
>>>> Holy Crap,
>>>> What's with all this talk about silver solder, stick solder, Oxy/ACE,
>>>> yadda, yadda....
>>>> That stuff is uh, nice, but certainly not neccessary for 'this' task.
>>>> - Score the pipes, fittings outside / inside with steel wool, clean
>>>> em' off with a dry 'clean rag'.
>>>> - Fit together parts/joints, flux with water base (non-Acid) flux
>>>> - Turn on the $10.00 propane torch, heat the joints until the flux
>>>> discolors , wet the seams really nice with 95/5 solder.
>>>> Bob's your uncle....
>>> That's nice, but technical bulletin # TB 98-04B Dated 11/12/98 states
>>> not
>>> to use low temp (soft) solder on R410a units.
>>> Situation: It causes a jell-like acidic substance that will plug
>>> metering
>>> devices, strainers, and feeder tubes.
>>> Solution: Units must NOT be installed with flux and soft solder. Units
>>> MUST
>>> be brazed using silver bearing or non-silver bearing brazing material
>>> such
>>> as sil-fos or plos-copper on all copper to copper connections.
>>
>> Man,
>> You're quoting regs from 10 years ago !
>> You guys sure have some strange regulations down there.... Also,
>> where would the acidity be coming from if you are using a non-Acid
>> flux ? The chemical properties of 95% tin and 5% Zinc SOLDER is
>> 'completely' different than the zinc coating say,.. on the inside/
>> outside of a pipe ! Companies here have been installing 60 gallon
>> water tanks (1000's of them yearly) the same way with no issues. I
>> can't understand why anyone would use "Copper Phos" (is that what you
>> meant ?) or any stick for that matter on a simple copper to copper
>> connection, and especially a tiny 1/8th connector in a refrigeration
>> scenario.
>>
>> The only reaon anyone wouldn't use the "Far less expensive 95/5" is
>> because they don't have the skills to keep the pipe and connectors at
>> a constant temperature which is far LOWER than stick or silphos. The
>> application in question just does NOT warrant Stick (silver bearing
>> solder maybe...) but Copper PHosphate and High temp stick ?......
>> Overkill.
>>
>> Cheers,
>>
>> /FC....
>>
>>
>>
>> Yeah, following manufacture's installation instructions is "Overkill".
>> <rolleyes>
>
> It is really irritating to have units that were brazed to code with
> 15-Silver phos 20 to 30 years ago and not one damned call to top them off.
> Christ, a Guy could starve to death doing it right. I wonder if maybe we
> could borrow a few $thousand from the guys that get call back after call
> back due to shitty work practices. Next, some hack will pop up and try to
> sell us on superglue, because you can save on using nitrogen.
What's nitrogen for??? :-)
Stormy is now searching Nitrogen and HVAC...
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