A process for consolidating and reusing design knowledge

Keep in mind that the contractor is the one that is responsible for the warranty for the first year.

Ask for an option on a 5-year and 10-year parts & labor warranty.

The suction line has a severe bend, almost to the point of being crimped, just before it enters the outdoor unit (pic attached).

I've also asked that the new unit be relocated a few feet to get it away from the fence and gas meter it is too close to currently.

With the height that the lines enter the house and where they emerge, I think that they must run straight through the ceiling of the finished basement, about 20' or so.

The new unit probably has a 12 inch minimum clearance on all sides, maybe more on other sides. Storck - Looks like you've got a tough job to change the lineset. Make sure they get rid of the kink outside (cut and splice), use driers, triple evacuate, and move the unit away from meter and fence. There are several different ways to look at this: "All brand new or R-22" or Keep the existing line set, insist they flush using RX-11 followed by a nitrogen purge and deep evacuation (hopfully the installer has a micron gauge).

Could you offer any advice on questions I should be asking about how they intend to flush and reuse the lineset? Does the fact that my old system has a leak have an impact? Any pointers on how the lineset should or should not look outside after they're done (pics of current attached)?

Thanks a lot for any advice you can give me, Scott Scott.... Where does that lineset go after it enters the wall in the picture??

All the proposals specify reuse of the existing 3/4" and 3/8" lineset.

I've got several proposals for replacing it with a new compressor and coil using R-410a.

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