Yesterday found a scroll compressor locked up on Bryant RTU. Today I replaced the compressor & drier, pulled 500 micron vaccum, and added the 9# of recovered R-22. I'll note that the factory drier was about 75% restricted. Restart unit and am running 70/285# with 86 deg air entering the condenser which I split and washed 2 weeks ago - double checked cleanliness and its spotless. Can't figure out why its running such high head.
Next...pull refrigerant, change vacuum pump oil, pull another vacuum and weigh in factory charge - same results and subcooling high at 25 degrees.
Here are the facts...
86 degree OAT
76 degree RAT
70# suction, 285 - 290# head
Superheat 7-9 degrees
Subcooling 25 degrees (fixed orifice metering device)
Suction Temp 48-50 degrees
Discharge temp 205 degrees
Compressor amps & volts all 3 legs - 23.50, 206V
Cond fan spinning correct direction
No temp drop across new drier
Bryant RTU, MN#: 580FPV072115AB - -, SN#: 2102G30366
Old compressor: Carlyle MN#: SRY752AC01, SN#: S2002K09245
New compressor: Danfoss MN#: hlm075t2lc6, SN#: s2615k01668
9# R-22
The system is kind of behaving like its overcharged to me. I weighed what I took out and verified it was 9#...scale seems on. I'm assuming the high subcooling is due to the high condenser split temps. I'm kind of at a loss on what to do next. Hoping someone might have some insight. Could the factory charge on the nameplate be wrong??
Next...pull refrigerant, change vacuum pump oil, pull another vacuum and weigh in factory charge - same results and subcooling high at 25 degrees.
Here are the facts...
86 degree OAT
76 degree RAT
70# suction, 285 - 290# head
Superheat 7-9 degrees
Subcooling 25 degrees (fixed orifice metering device)
Suction Temp 48-50 degrees
Discharge temp 205 degrees
Compressor amps & volts all 3 legs - 23.50, 206V
Cond fan spinning correct direction
No temp drop across new drier
Bryant RTU, MN#: 580FPV072115AB - -, SN#: 2102G30366
Old compressor: Carlyle MN#: SRY752AC01, SN#: S2002K09245
New compressor: Danfoss MN#: hlm075t2lc6, SN#: s2615k01668
9# R-22
The system is kind of behaving like its overcharged to me. I weighed what I took out and verified it was 9#...scale seems on. I'm assuming the high subcooling is due to the high condenser split temps. I'm kind of at a loss on what to do next. Hoping someone might have some insight. Could the factory charge on the nameplate be wrong??
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