accummulator0 pages

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HORIZONTAL SUCTION

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Line Accumulators

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HENRY

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TECHNOLOGIES

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The refrigeration compressor is designed to compress

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vapor only. A suction line accumulator prevents compressor

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damage from a sudden surge of liquid refrigerant and oil

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which could enter the compressor from the suction line. The

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suction line accumulator is a temporary reservoir for this

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mixture, designed to meter both the liquid refrigerant and oil

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back to the compressor at an acceptable rate. This pre-

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vents damage to the reed valves, pistons, rods, and

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crank shafts. Accumulators range in size from 4" to 123^+"in

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diameter. All vessels over 6" inside diameter are designed

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and manufactured in accordance with Section VIII of the

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ASME Code and are marked with the U or UM Code sym-

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bol. Accumulators 6" outside diameter and under are

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copper brazed or welded, UL listed, and equipped with

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copper or copper plated fittings. All our accumulators fea-

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ture a rust resistant finish which meets a 500 hour salt

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spray test. This is important to suction line accumulators,

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where moisture and condensation can result in excessive

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corrosion. Accumulators have a metering ejector device

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that picks up liquid, vaporizes it, and returns it to the com-

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pressor. This prevents liquid slugging and controls oil re-

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turn. Vertical accumulators protect the return orifice with a

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screen assembly, and also feature a fusible relief device in

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the S-7000 Series.

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Selection of a suction line accumulator should be made on

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the basis of the following three capabilities. The accumula-

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tor should have an adequate liquid holding capacity, which

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can vary with the system. Normally this should not be less

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than 50% of the system charge. If possible this value

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should be checked based on actual tests. A second consid-

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eration should be the ability of the accumulator to perform

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without adding excessive pressure drop to the system. The

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recommended maximum tonnages shown in the following

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tables are based on a pressure drop equivalent to 1/2°F.

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These ratings are those of the accumulator, based on oil

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return through the accumulator, and will be modified by the

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length of the suction line and compressor displacement.

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Minimum tonnage Is the lowest flow that will insure proper

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oil return. Finally an accumulator should have the capability

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of returning liquid at the proper rate and under a range of

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load conditions. Accumulators should have a Heat Element

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added on low temperature applications (0°F and below)

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such as the S-9111 or S-9112 (see page 99) to help boil off

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liquid refrigerant and raise the oil temperature to help facili-

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tate oil flow. Accumulators may be insulated to prevent con-

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densation or frost on the outside of the shell.

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3/4:l FPT

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1/2" FPT

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Liquid accumulators of this design should not be used when

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the temperature of the liquid refrigerant Is less than +15°F In

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the accumulator. These accumulators have a 1/2" FPT con-

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nection for liquid Injection and a y4" FPT connection for hot

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gas bypass. These connections can also be used for a relief

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device as required by UL 207.

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Catalog Number	Size Conn. ODS	D A	imensic n Inche B	ns s C	Refrij R134a	jerant He (Lbs. 0°F R22	Iding Cap. sat.) R404a/R507	Refrige +40°	rant Re R-134a +20°	comme 0°	ided To Terr +40°	ns Refr iperatu R-22 +20°	igeratic re (°F) 0°	n at Su R +40°	ction Eve -404a/R +20°	porating 507 0°
S-7615	1 5/8	6	28	21.5	23.3	21.3	19.3	15	10	6.25	29	20	20	12.5	19	11.5
S-7621	2 1/8	6	36.75	31.6	31.6	29	26.2	28.6	19.5	12.5	50	30	30	25	33.2	22.9
S-7625	2 5/8	6	50	43.5	46.7	42.6	38.6	50	35	23	95	95	65	45	61.7	41.2

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COMPONENTS

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Industrial & Commercial Refrigeration Products 800.96.HENRY

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R21

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