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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.
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.
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)
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 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