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Horizontal, UL

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.

Technical Specifications

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)


Main Features


ODS connections


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 Guidelines

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.