install a new condenser

[soldier4]

We decided to replace the outside Goodman condenser with a new Trane to match up the inside one month old American Standard coil.

What are the steps they should follow to insure a "good" install? I heard they should do a complete wash out (triple evacuation...), is this necessary for a relative new coil (one month old)?

The inside coil is a 3 ton A S(model# 2TXCB036AC3HCAA), is there a paticular Trane model we should look for to match the coil other than it should be a 3 ton, 13 seer?

Thank you!

[amickracing]

What I would look for is this...

Make sure the lineset is the correct size, which it most likely is. If the new unit is the same refrigerant (r-22) as the old one, no worries there.
I always blow the old linesets out with some nitrogen. Most times nothing happens, but occasionally I'll blow some extra oil out. Just a bit of extra oil won't hurt the system, but it's not a bad idea to try to blow some out.

If the old unit was running you shouldn't need an acid test done, but if the old one died, I'd run one to be safe. Flush the lineset if needed to remove the acid.

When they connect the new unit to the old lineset, if they braze it they should be purging with nitrogen. Also they should pull it into a deep vacuum that holds 500 microns. I wouldn't worry about the triple evac. I rarely have to do that, especially on a system that isn't in bad shape.

Overall that job isn't too tricky to do, so a good contractor shouldn't have problems. I wouldn't pester them too much, no one wants to work with a home owner looking over your shoulder the whole time. That being said I'm more than happy to answer questions when I'm working on their systems though.

Make sure it's charged correctly using super heat or sub cooling.... sit back and enjoy the cold!

[iheatncoolinnc]

Matching is a good move. Evauation with micron gauge is key. If they do not use or own one, I would be leary. A good question is how do you evacuate the system. Do you use a micron gauge? If they answer satisfactorily, they are on the right track. It is difficult for a homeowner to distinguish between contractors on a job like this. If you were doing a replacement of the coil and unit you would be looking for a duct analysis and a manual J calculation to determine size of equipment and if ducting is sufficient to handle the air flow. MOST companies that will go to that much trouble on sizing the system properly will do the job properly. You did not mention having the system sized by manual J, so I assume you are not worried about the size of the system which also is key to comfort.

[turtle]

Originally posted by soldier4
We decided to replace the outside Goodman condenser with a new Trane to match up the inside one month old American Standard coil.

What are the steps they should follow to insure a "good" install? I heard they should do a complete wash out (triple evacuation...), is this necessary for a relative new coil (one month old)?

The inside coil is a 3 ton A S(model# 2TXCB036AC3HCAA), is there a paticular Trane model we should look for to match the coil other than it should be a 3 ton, 13 seer?

Thank you!



This is turtle. American Standard or A/S and Trane are the same unit . the sticker is the difference between Trane and American Standard. Look it up at ARI and see.


TURTLE