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SUCTION LINE ACCUMULATORS
The function of a Suction Line Accumulator is to provide temporary
storage and controlled return of liquid refrigerant and oil to protect
the compressor from damage by sudden surges of liquid.
Suction Line Accumulators are installed in air conditioning and refrigeration
systems where sudden return of liquid down the suction line is possible.
Suction Line Accumulators are designed to meter both liquid refrigerant and
oil back to the compressor at a controlled rate. In addition to protecting the
compressor from damage, the Accumulator helps maintain system efficiency
and proper crankcase oil levels.
Henry Technologies' Suction Line Accumulators are suitable for use with
HFC and HCFC refrigerants and their associated oils, as well as other
industrial fluids non-corrosive to steel and copper.
Materials of Construction
The shell and caps and mounting brackets are made of steel. The ODS
connections are made of plated steel.
Maximum working pressure = 302 PSI (20.8 Bar)
Allowable operating temperature = +15°F to +250°F (-9.5°C to +121°C)
Henry Technologies' Suction Line Accumulators are UL and C-UL Listed by
Underwriters Laboratories, Inc. Additionally, Suction Line Accumulators are
designed and registered for use in Canada. Please contact Technical
Support at 1-800-627-5148 for CRN details and list of approved provinces
and territories. Suction Line Accumulators can be CE marked in accordance
with PED by adding a “-CE” suffix to the part number. (i.e. S-7621-CE)
3/4 NPT fitting for hot gas bypass or relief device
1/2 NPT fitting for liquid injection or relief device
Mounting brackets included
Prevents liquid slugging
Controlled liquid refrigerant and oil return
How it Works
Refrigerant vapor from the evaporator enters the Suction Line Accumulator,
along with any liquid refrigerant and oil. The outlet of the Accumulator is
placed to ensure vapor is returned to the compressor. On horizontal
Accumulators, liquid is metered back to the compressor via a dip tube. This
metering only occurs when the compressor is running.
Installation - Notes
1. Install the Accumulator after the Suction Line Filter-Drier.
2. A pressure relief device connection is provided at the top of the vessel.
The user must endure the vessel is protected from over-pressure.
3. For low temperature applications heat bands should be installed at the
outlet end of the horizontal Accumulator.
4. Accumulators may be insulated to prevent condensation or frost on the
outside of the shell.
5. Full instructions are given in the Product Instruction Sheet, included
with each unit.
Selection of a Suction Line Accumulator should be made based on three
1. The Accumulator should have adequate liquid holding capacity.
Normally this should not be less than 50% of the total system charge.
2. The Accumulator should be selected in order to avoid excessive
pressure drop in the system.
3. The Accumulator should have the capability of returning liquid at the
proper rate under a range of load conditions. The listed tonnage
ratings ensure sufficient flow for proper liquid refrigerant and oil return.