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Originally Posted by Kevin Weaver

I was under the impression that you cannot use a gas hot water heater with a desuperheater? Maybe I am ms-led?

Work looks amazing (with the exception of the source piping) but Kevin is correct. You are not supposed to hook a hot water generator to a gas water heater.

Originally Posted by ga-hvac-tech

AS I understand it... Street fittings, along with reducing bushings... are a no-no according to natl gas code. Not sure why... however they are.

Anyone know the details of this code?

I've been told, but not shown in the books this:

All things have a rating in our industry. All things are tested.
Although BI fittings exist, does not mean that they passed the strength test for all things that use BI.

BI used in boiler piping has a different strength test requirement than gas.

Bushings/street fittings have passed the strength tests for boiler piping, but failed to meet the requirement for gas piping.

Now, if you look at a manufacturers instructions on certain brand furnaces, they will recommend using a street 90 on their gas valves.
Goodman left gas entry is one example.

Now, one would say "hey, they can't do that! ASME says they can't!"

Except that manufacturers recommendations can trump it, primarily because they are responsible if it fails.

It's not exactly that street fittings and bushings are "banned", it's that their "not approved".


This is kinda related to PVC flues. No authority has technically "approved" PVC pipe for furnaces, yet it's been done for years.
The PVC manufacturer has approved their pipe for these installations, and thus can be used.

Originally Posted by jimmyed

Got the desuperheaters plumbed. No leaks.

I was under the impression that you cannot use a gas hot water heater with a desuperheater? Maybe I am ms-led?

AS I understand it... Street fittings, along with reducing bushings... are a no-no according to natl gas code. Not sure why... however they are.

Anyone know the details of this code?

Originally Posted by hvacvegas

Hate to say this, but you can't use a street 90 on your gas line on your first floor unit.

Why in the world not? Been using street 90's for a long time.

That's because there isn't one! I did add one, but it was after the pic was taken.

Customer isn't real happy with the source lines, gonna call the loop guy back and see what he will do.

Numbers for the geo's seem to be spot on with it plumbed that way.

Is it just hard to see the filter drier for the downstairs system?

Originally Posted by jimmyed

Upstairs unit didn't turn out real great, no room and no where to get my flues out except one place. Just wasn't real happy with it.








I also learned that from now on I am running the hoses from the pump to the unit. This is an absolute joke. Excuse, "That was all I could do with the hose that was there" Well go buy more GD hose!!! Makes me sick! I tried to keep everything neat and straight with the world, and he stacks this **** on it....

wow that sucks, you nailed it on all your stuff! I know the perfectionist in you doesn't like the upstairs one but it still turned out well, sometimes there's just not enough space to be perfect.

Do you have one of those heat welder tools(don't know real term) for fusing the plastic pipes together, my last company had that so we could put 90's in and make it all clean and professional. Definitely don't leave it to someone else because it's hard to find anybody that cares, if I had been that guy there is no way I would've butchered your job like that, I would've come back with the right stuff even if it meant I got a chewing.

Originally Posted by JCT

Ya that source side piping is bad!! Going to want to check flows on each unit not piped right in my opinion

Same.

Last time I did a 2 systems off 1 loop, we use 2 pump stations and branched off before the stations.


Hate to say this, but you can't use a street 90 on your gas line on your first floor unit.

Your work is beautiful though.

Ya that source side piping is bad!! Going to want to check flows on each unit not piped right in my opinion

Upstairs unit didn't turn out real great, no room and no where to get my flues out except one place. Just wasn't real happy with it.








I also learned that from now on I am running the hoses from the pump to the unit. This is an absolute joke. Excuse, "That was all I could do with the hose that was there" Well go buy more GD hose!!! Makes me sick! I tried to keep everything neat and straight with the world, and he stacks this **** on it....

Took me a day and a half by myself to get the basement furnace changed and lineset ran, nim control, and flues ran outside. Working on the upstairs unit tomorrow. Loop guy supposed to be there tomorrow as well.

Couple of twins I picked up today, damn 5 ton coils are big! Got all my sheet metal made, gonna change the downstairs unit tomorrow. Upstairs maybe thursday.

looks real good!

Yeah, just 5/8 lineset left overs.... Bending it saves using fittings.. Only used 4 street 90's and 3 tees. Plus my shutoff's and check valves.

Is that soft copper? Looks good. Boss has our guys use pex for desuperheater. Looks like crap. I'm anxious to see your linesets. I've never been happy with mine on those split systems.

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Got the desuperheaters plumbed. No leaks.

Here is the downstairs unit that comes out. Unhooked the ac today and measured it up for the transitions and return drop. 1986 Bryant, never had gas added. Not a bad install at all minus the wild drip leg ha! EAC was long ago switched over to media filters, as most are.
Think I am going to reuse the lineset for the upstairs, or well what is in the wall going up there. Need to get at least a 4 wire stat wire up there though to run the geo.

Originally Posted by gravity

make sure you use the proper lines. if you go over 60' i think. you need to upsize to a 1/2" liquid line.

good luck. it will be a fun job

Should be good on that, Shouldn't be no more than 25 feet to the upstairs. Basement one is right next to the geo's.

Yes I will have ball valves after the flowcenter. Loop guy does all that, or at least he said he likes to. Supposedly does pretty tidy work. I hope so!

add some ball valves in the geo supply and returns to set the flow. i used a WF solenoid on my lines so i didn't have water flow in the unit thats off.