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Vertical, 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.

The Heat Exchanger models are designed to be used on low temperature

systems to sub-cool the liquid line. Passing the liquid line through the heat

exchanger coil on the Accumulator also helps to boil off liquid refrigerant in

the Accumulator. Heat Exchanger models can help to improve system

efficiency while helping oil flow in the suction line. To avoid overheating the

compressor, do not use discharge gas through the heat exchanger coil.

The Heat Pump models are designed to be used on heat pump systems

where winter heating can cause an increased amount of liquid refrigerant

return. The Heat Pump models incorporate a smaller orifice to prevent

excessive liquid flow back to the compressor.

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 U-Tubes are made of steel. The ODS connections

and heat exchanger coils are made of solid copper.

Technical Specifications

Maximum working pressure = 450 PSI (31 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-7063HE-CE)


Main Features


ODS connections


Heat Exchanger and Heat Pump models available


3/8”-16 Mounting stud on all models


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 liquid is held at the bottom of

the Accumulator until it is metered back to the compressor. A U-Tube is

connected to the outlet of the Accumulator to ensure vapor is returned to the

compressor. On Vertical Accumulators, liquid is metered back to the

compressor via a screened orifice at the bottom of the U-Tube. This

metering only occurs when the compressor is running.

Installation - Notes

1. Install the Accumulator after the Suction Line Filter-Drier.

2. An integral Fusible Rivet is included to protect the Accumulator from

over-pressure due to excessive heat. Replace the Receiver

immediately if the stamped temperature rating is exceeded.

3. For low temperature applications heat bands should be installed at the

bottom of the Vertical 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 minimum

tonnage ratings ensure sufficient flow for proper liquid refrigerant and

oil return.