Going to start on this one soon.

[hvacvegas]

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.

[mason]

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.

[RyanHughes]

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

[jimmyed]

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.

[jimmyed]

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.

[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?

[Kevin Weaver]

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?

[hvacvegas]

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.

[Frederick_Tech]

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.