Copeland 577-0536-00 Accumulator

The Copeland 577-0536-00 Tank Accumulator Assembly is a suction line accumulator from Copeland’s A-AS series, supplied as the A-AS-3126. It is a UL listed refrigerant accumulator rated for use with CFC, HCFC and HFC refrigerants, with 3/4" ODF solder connections on a roughly 3" diameter by 12" tall blue epoxy-coated steel shell and a 450 PSIG maximum working pressure.

An accumulator is the compressor’s insurance policy against liquid slugging. During startup, defrost, load swings and expansion-valve hunting, liquid refrigerant can run down the suction line. The accumulator catches it in the shell and lets only vapor, carrying oil with it, pass back to the compressor. An internal inlet deflector keeps the incoming flow from splashing and helps collect the oil. The two copper stubs are marked: the line from the evaporator goes to the fitting labeled INLET, and the factory rubber plugs should stay in until you are ready to braze so moisture stays out of the shell.

Install it in the suction line as close to the compressor as possible, always upright in the vertical position. On a heat pump or reverse-cycle system it belongs between the reversing valve and the compressor. Purge with nitrogen while brazing, keep the flame away from the painted shell, and pull a deep vacuum before recharging. If a compressor has already failed from floodback, replace a contaminated accumulator along with it, because trapped liquid and oil can carry acid and debris back into the new compressor.

Key Benefits

• Compressor Protection: Stops liquid floodback from reaching the compressor, the failure mode behind most slugged valve plates, broken rods and washed-out bearings.
• Wide Refrigerant Range: Marked for CFC, HCFC and HFC systems, so one accumulator style covers legacy and current refrigerant systems.
• Sized for 3/4" Suction Lines: The 3/4" ODF connections solder directly into a standard 3/4" copper suction line.
• Genuine Copeland Part: A Copeland A-AS series accumulator with the original UL listed label, built to the manufacturer’s pressure rating.

Common Questions

• What size connections does it have? 3/4" ODF solder connections on a shell about 3" in diameter and 12" tall.
• Where does it go in the system? In the suction line close to the compressor, mounted upright, with the incoming line on the INLET fitting. On heat pumps, install it between the reversing valve and the compressor.
• When should I replace the accumulator? Whenever a compressor failed from liquid slugging or burnout, or when the old shell is dented, leaking, or loaded with sludge and oil that will not drain.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.