A/C advice, tech was less than helpful
We had a tech come out for the annual maintenance. Our numbers for the upstairs unit were skewed.
Here is the rundown. The Condenser is a 15 year old Rheem. It was manufactured on 4/96 and it is 2.5 ton. The model number is RAMA-030JAZ. The furnace is 6 years old. It is a Rheem Super Quiet 80. It was manufactured on 10/05 and the model number is RGDN-05EAUER.
The tech said that the furnace was 2 ton, and that it was choking the system. The system has been cycling alot at night and it has been taking a longer time for it to cool. Last year it would take 2-3 hours to go from 78 to 73 degrees. This year it is taking about 7 hours, and at night it is kicking on and off often.
Here are the numbers that the tech gave:
Outdoor temp 89
Indoor temp 76
suction pressure 60.3
discharge pressure 305
supply air temp N/A
return air temp N/A
system amps 12.6
compressor amps 10.9
motor amps 1.6
contactor volt drop .3
outdoor coil dirty
evaporator coil can not see
drain lines cleared yes
refigeration leaks none
condensate pump none
In his notes he mentions system is running very high head pressure and low suction. He also has a different number for subcooling in his notes, 38.9.
I did my due diligence and looked at the system myself. The furnace is actually a 3 ton system, so he was wrong on that account. The previous owner had the downstairs unit moved upstairs back in 05 and in the process put in a new coil and furnace. This is the workorder info from the install back in 05:
1 Rheem 50,000 BTU 80% efficient furnace with 3 ton Drive
1 Relocate A/C from downstairs to upstairs
1 3 ton 12 seer coil 17" installed
The tech said my system was mismatched because he thought it was a 2 ton furnace and that it needed to be replaced. Obviously, I do not have faith in his assessment. Does anyone have any idea what the issue could be, and why my subcooling and super heat, and pressure numbers are so skewed, and what I can do to make the system run more efficiently?