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#21 ·
I think it is in the Kysor/Warren book too.

We never clamped anything but our main suction risers, and liquid lines coming in to the house.

Our saddles were PVC gutter, cut in one foot pieces. We would drill two holes in the saddles to accept push pins. The kind in door car panels. The pins would straddle the unistrut so the saddle would not dislodge during expansion.

You don't know how many times, I have seen a plumber get busted, for having a PVC vent in the return air. The Inspectors never said a word about our saddles. Go figure.
 
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#23 ·
When I first started, we installed the expansion loops in a few stores. A few years later, I recall going on a call where one of them broke. That was the last I heard of them.

45's and street 45's are banned by every single chain that I've ever worked for. They are not just banned in refrigeration, but in the plumbing, and even the drains. (Including the walkins...)
 
#24 ·
condenseddave said:
45's and street 45's are banned by every single chain that I've ever worked for. They are not just banned in refrigeration, but in the plumbing, and even the drains. (Including the walkins...)
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Why?
 
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#26 ·
icalled haris and englehard.... staybrite 8 is a stronger joint because it doesnt weaken the joint due to heat.. flame on 15% silpos etc... it is what it is
 
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#27 ·
So , you come across a walk-IN freezer and find the heater has rubbed a hole in one of the evap coils. You take your dikes and carefully remove a section of alum fins, now staring at the Really Thin copper tube with hole, what do you grab..... the staybrite 8 that takes 500 deg to melt, or the 15 perc braze and shoot 1500 degrees in there hoping you dont blow a huge hole in the pipe?
 
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#28 ·
I use brazing rod on coils and never had one I couldn't fix.... but if I had to I would use stay Brite #8. I have no problem with it. I've used it on suction driers that were going to be un sweated later and big vibration eleminators were all the other joints were soft soldered.
 
#29 ·
Yea... We've Beat this Horse to Death already. For the Nay-Sayers... Know what they put coils together with for the last 20 years? It wasn't 15%. :eek2:

I/we use 15% for 95% of everything but just like Mr. Snapperhead said sometimes you gotta break out the SB8. The other Key thing is Nitrogen. Sometimes SB8 just makes sense when you Can't Use Nitrogen (mainly time crunch). I've Never had a Joint/Repair Fail where I used SB8.
 
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#30 ·
frozensolid said:
If your a newbie 99.9 percent of the time you will likley be brazing using stay-silv 15. Fiftenn percent siver, four or five percent phosphorus,and the rest copper (35,000 PSI tensile). You wont be using flux.

Learn what you need to know first. It will help you understand the other things, when they come along.

Flux is used with higher percentage silver solders, and soft solders. Which flux do you use. Read the bottles the answer is right there.
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If the new guy can't weld with 5 he sure ain't getting 15.
 
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#32 ·
The_Sale said:
Awww man, I'm glad that's not true, because I would have never been given a pound of 15%. I can't soft solder to save my life.
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I can make you a pro at it

3 easy steps

Clean with sandcloth/wire brush really good , you need both parts shiny

Flux is also a cleaner , rub it on good (with clean fingers)

Reach in with your solder every few seconds , and kinda slowly wipe copper joint on opposite side of your flame ( if it doesnt melt Do NOT hold it there ) and the time you wipe and it melts , make a circle around joint , and get torch and solder off it !
 
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#33 ·
Snapperhead said:
So , you come across a walk-IN freezer and find the heater has rubbed a hole in one of the evap coils. You take your dikes and carefully remove a section of alum fins, now staring at the Really Thin copper tube with hole, what do you grab..... the staybrite 8 that takes 500 deg to melt, or the 15 perc braze and shoot 1500 degrees in there hoping you dont blow a huge hole in the pipe?
Click to expand...
Temperature is only one part of it, with oxyacetylene, adjust your mixture to control the btus and how large or small of an area you are heating. Rich on acetylene spreads and softens the heat, oxygen

rich gives you a pin point hole burner. The freezer I would repair with 15, but if you look hard enough, you will find almost every store I've put in has an 8 joint that I could not do in 15.
 
#34 ·
Snapperhead said:
I can make you a pro at it

3 easy steps

Clean with sandcloth/wire brush really good , you need both parts shiny

Flux is also a cleaner , rub it on good (with clean fingers)
Click to expand...
You only need a little flux.

Flux the pole not the hole
 
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