Which Trane Coil Would be Better?

[mcginkleschmidt]

There is another thread with a similar question, http://hvac-talk.com/vbb/showthread.php?threadid=80370, and rather than try to hijack that thread, I‘ll pose my question here as a separate thread.

Two years ago I had a complete furnace (TVX120R9U5V) & AC replacement with a Trane XL14i 4-ton AC compressor unit 4TTX4048A coupled with a RX054S evaporator coil. Of the three proposals I obtained, two contractors quoted the RX054S coil while the third contractor quoted the TXC048 evaporator coil unit. When I pointed this difference out to the third contractor, he agreed to supply the RX054S coil for the same price. The third contractor that ended up doing the work said that I would probably get better humidity control with the RX054S than the TXC048 coil.

The furnace and AC have worked flawlessly since and I couldn’t have been more satisfied with my contractor selection. Incidentally, the installing contractor was the higher priced of the three but the spread was only a few hundred dollars. The new installation has made a major difference in the gas and electricity used and the comfort level is much improved over the replaced system that was 29 years old. But in the back of my mind I always wondered what were the major differences between the two coils, the RX054S and the TXC048, and which coil would have been a better match? Would there have been a major SEER rating between the two coils?

[Gunnery Sergeant Hartman]

The RXC is used with 410A and the TXC is for r-22.

He would have had to change the TXV metering device.

[bama 101]

Program & Product Identifier
Today's Date 07/17/2005 01:09:30 PM
Created Date:

Last Modified Date: at
Status: Active

Obsolete: No
Manufacturer: THE TRANE COMPANY

ARI Reference Number: 548433

ARI Program: AC
ARI Type: RCU-A-C

Trade/Brand Name: XL14i
NAECA Designation: Yes

Outdoor Model Number: 4TTX4048B1

Indoor Unit(s): RXC054S3
Ventilation Rate:
Product Performance Ratings
ARI Rating
Cooling Capacity (Btuh): 48000

SEER Rating (Cooling): 13.25 ----------here is answer





#2
Program & Product Identifier
Today's Date 07/17/2005 01:08:48 PM
Created Date:

Last Modified Date: at
Status: Active

Obsolete: No
Manufacturer: THE TRANE COMPANY

ARI Reference Number: 548542

ARI Program: AC
ARI Type: RCU-A-C

Trade/Brand Name: XL14i
NAECA Designation: Yes

Outdoor Model Number: 4TTX4048B1

Indoor Unit(s): TXC048C4
Ventilation Rate:
Product Performance Ratings
ARI Rating
Cooling Capacity (Btuh): 47000


SEER Rating (Cooling): 12.25 ------------here is answer

[mark beiser]

The total capacity and SEER of the system is higher with the RXC054 coil.
Moisture removal is higher with the TXC048C coil.

The RXC coil has a built in TXV for R-410a.
THe TXC coil is Tran's standard efficiency R-22 coil, but can be used with R-410a if a TXV is added.

It is not possible to tell wich one would be best for your application without seeing a load calculation for your home.

[mcginkleschmidt]

Thanks guys for the feedback. I really appreciate it.