old coil(04)new condenser

[mickeyd]

lo all first time here.question i have is can a new 2 ton 13 seer condenser be used with a previously installed coil?the coil was installed with the furnace in 04.the customer wants me to install a new 13 seer rheem condenser.(coil is rheem also)american standard says i can do an orifice change on their units,but was told by a guy at rheem(not a tech)that i will have to change the coil to a 13 seer.is this true or is there any way around it?thanks

[BaldLoonie]

You can do it but I sure wouldn't change brands. If this is a RCBA piston coil, you could put a Rheem TXV kit on it and turn it into a coil that will get 12-13 SEER. For example, take a RCBA-024 piston coil, install the RXCT-BCB TXV kit on it and you get a Rheem rated 12.40 SEER match with the RAND-024 or 13AJA24 outdoor units. I would not do it without the TXV upgrade.

[RoBoTeq]

Against my better judgement, Goodman also allows a 13 SEER condenser to be installed with any piston or TXV coil as long as the metering is the size required for that new condenser. What is not being discussed by manufacturers is what kind of efficiency may come out of such a match.

[BaldLoonie]

Here's a question then, nobody has been able to answer.

If Goodman calls for a 70 piston (an example, don't know what they use) in their 3 ton coil and Rheem calls for a 65, what piston do you use if you put a GSH13036 on a RCBA3765 coil?