Original message
| treefarmer
 |  "Need info on condenser install."
, posted Sat 24 May 01:20:  
I installed a cleaned Trane XE900, model TTD730B100A0, 1989 vintage, outside condensing unit into an existing system, leaving the original evap A-coil in place. From the plate on the old unit,I think it was mfg. in 1970 and 3 1/2 ton. Had galvanized tin enclosure and a slanted front where the fan was mounted. Don't know the brand.
After pulling a vac. for 12 hours, I added R-22 until I had 60psi suction pressure and 12 amps on the compresser on a 60 degree day.
Today it is 86 degrees and 88% humidity and after running the unit for 45 minutes the suction pressure is 74psi and compressor is at 14 amps and the suction line temp is 45 degrees at the outside tap. There is a little condensation on the compresser. The inside discharge temp is 65 degrees, inside return air is 78 degrees.
Is this enough info to make a determination as to whether this is satisfactory or would it operate better to use the original A-coil that came with the XE900.
The house is a 1960's construction and has had more attic insulation added at some point in time.
I'm doing this for some friends that just don't have the means to get a new system installed. The old condensing unit finally died, compressor was locked and the fan motor was not running up to speed and local elec. motor shop said the fan motor made by Electric Motors and Specialties Inc. is obsolete.
Any info would be appreciated--------------THANKS.
[this message was edited by treefarmer on Sun 25 May 14:56] |
| Replies:
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| | treefarmer
|  "Re(2):Need info on condenser install."
, posted Mon 26 May 10:22
Thanks for the chart and info. I'll try and clean their evap coil and do a more accurate check on the pressure and temp. to get proper superheat now that I know how to check it.
I take it that the amp draw on the compressor is not a good indicator of the system having the correct charge.
Thanks again for sharing your time and knowledge on this, I really appreciate it.
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