I would like to know more details about maintenance of this unit running last 30 years with occasional Freon R22 leak.
Any further specifications details will be appreciated.
Heat Controller inc.
APCO Model No. QCH36A-1
B/M No. 3235-7-18B
Ser. No. 28903 148474
Air condition 1989 3 ton capacity
model 8 Seers
Recharged with R22.