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1 2010 Emerson Climate Technologies

Printed in the U.S.A.

AE4-1311 R24

Application Engineering

B U L L E T I N

Mounting Parts for Copeland

Compressors

AE4-1111 R24 November 1996Reformatted October 2010


B U L L E T I N

Several different mounting assemblies are used withCopelametic, Copelaweld and Copeland Scrollmotor-compressors. The following information shouldbe used as a guide in the application and installationof these mounting assemblies.

Vendor sources for mounting components are providedin Table 5 for those system manufacturers who wantto obtain the parts directly from the manufacturer.

Copelametic Compressors

When mounting the H and K model Copelametic

motor compressors, the spring type mountingassembly shown in Figure 1 should be used.

When units using this mounting assembly areshipped from the factory, the motor-compressorsare rigidly secured to the base by the mountingcomponents. Before these units are put into operationthe top mounting nut must be loosened to allow thecompressor to float on the mounting springs. (Allowapproximately 1/16" between the upper nut and theneoprene spacer).

The mounting assemblies for H and K com pressorsrequire a special locking device to prevent rotation of

the mounting bolt and for this purpose an extra holemust be drilled in the base for each mounting assemblyas shown in Figure 2.

The mounting assemblies shown in Figure 3 shouldbe used with all Copelametic motor-compressorslarger than the K models. This assembly is somewhatsimilar to the assembly in Figure 1, but the neoprenespacers used with this assembly are not to be in placeduring transit. Before units using this assembly are putinto operation, the top mounting nuts must be removed;one neoprene spacer placed on each mounting bolt,

and the mounting nut replaced leaving 1/16" spacebetween the upper mounting nut and neoprene spaceras shown in Figure 3. (Four neoprene spacers will befound attached to the compressor body).

The above method of mounting prevents thetransmission of noise while also preventing excessivemovement during starting and/or stopping of themotor-compressor.

When installing motor-compressors which use themounting assembly shown in Figure 3, the shippingspacer is to be in place during shipment to insuremaximum support for the compressor body during

transit. Before the unit is put in operation, the shippingspacer should be removed and discarded.

Resilient type mounts such as shown in Figure 4 areused on some two-stage compressors to reduce themagnitude and change the frequency of vibrationdue to pulsation. The same type mount is used ontandem compressors in order to compensate for minoralignment variations in the mounting rails.

Figure 1Mount is shown in properly adjusted position.

(See Table 1 for Usage) Figure 2

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B U L L E T I N

For transportation type refrigeration installations,in which the unit is subject to severe vibration, theflexible mounts should be omitted and the compressor

mounted rigidly to the unit base. This must be doneto prevent line breakage. These solid mounts must beperfectly level to prevent distortion of the compressorbody casting. (See Figure 5).

The individual components and mounting parts kitsfor all Copelametic motor-compressors are shown inTable 1.

Figure 3

Figure 4

527-0120-00 Mounting Kit No.Figure 5

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B U L L E T I N

Table1

CopelameticCompressorMountingPartsandKits

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B U L L E T I N

Table1Continued

CopelameticCompressorMountingPartsandKits

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B U L L E T I N

Copelaweld Compressors

All current production Copelaweld compressors areinternally spring mounted (with the exception of ZR

Compliant Scroll) to reduce vibration.

Resilient type external mounts have been developedspecifically for each model Copelaweld compressorafter extensive testing. The exact characteristics of eachmount vary depending on the weight, configuration,and vibration characteristics of the compressor onwhich it is used. Typical mounting assemblies areshown in Figures 6, 7, 8. Mounting part numbers foreach model are given in Table 2. Dimensions for thelocations of the holes required for each compressormounting option are shown in Figure 12.

On smaller single cylinder compressors, a softer rubber

mount can be used (a lower durometer rating) sincethe weight involved is not great, but provisions mustbe made for adequate dampening of lateral movementdue to the inherent characteristics of a single cylindercompressor.

Larger compressors normally take a somewhat stiffermount (higher durometer rating) because of theirweight, but have more natural balance due to multiplecylinder operation.

In general, rubber in shear provides better dampeningof vibration than rubber in compression, and the rubbergrommet is designed to provide as much shear stress

as possible.

Occasionally, system manufacturers desire to use onemounting for standardization purposes, even thoughthey may be using different compressors in production.It is possible that a given mount may not be compatiblewith different compressor characteristics, and may notadequately attenuate vibration and noise transmission.If a customer wishes to use a different mount thanthe standard Copeland mounting specified, thereplacement mounting must be carefully tested bythe customer to make certain that its use will notresult in excessive vibration, noise, and movement.It is most important that the mount not be placed inlateral compression by the compressor mounting foot.

Figure 6

Figure 7

Figure 8

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B U L L E T I N

Noise and vibration isolation may be affected by therigidity of the unit frame, the compressor mountingfoot configuration, or the refrigerant piping. In some

cases, a change in grommet durometer may be helpfulin obtaining more effective isolation, but generally thiscan only be determined by comparative testing duringunit development.

The metal sleeve inside the rubber grommet isintended as a guide to hold the grommet in place. It isnot designed as a load bearing member, and excessivetorquing of the mounting nut can collapse the sleeve.

It is critically important that the rubber grommet not becompressed by the washer, and a clearance space ofapproximately 1/16" between the bottom of the washerand the top of the grommet is recommended (see

Figure 9). Although this space is determined by thelength of the sleeve, it is possible that the proper sleevelength may be determined by the type of mountingstud. Weld studs, for example, may have a projectionaround the base of the stud affecting the seating ofthe sleeve. It is essential that the sleeve be firmlysupported on an even base, and a rounded projectionaround the base of the stud causing the sleeve to tiltat an angle can have detrimental effects on noise andvibration transmission.

Some users have developed mounting studs withshoulders to support the washer, and with a grommethaving a straight through hole the size of the mounting

stud, the inner sleeve can be eliminated.

When installing these mounting assemblies the holesfor the mounting bolts must be spaced correctly andlocated squarely. For this reason it is suggested a

template with holes very nearly the size of the mountingbolts be used giving the correct location of the boltswhen the mounting assemblies are installed.

Washers used with resilient mounts for Copelaweldcompressors must be properly sized to preventthe washer from slipping over the metal sleevecompressing the grommet. To avoid this problem,a lock-nut with integral washer is recommended forfastening the mounting assembly on weld studs. (SeeFigure 10).

Even though the compressor is properly mountedin the unit to minimize noise and vibration, it is still

possible that pulsation and noise can be transmittedfrom the unit to the building where it is installed. Thisis particularly a problem on split system condensingunits mounted on the roofs of multi-story apartmenthouses where the roof construction may be less rigidthan industrial construction. Single units in operationseldom create a problem, but a combination of severalunits in operation at once in fairly close physicalproximity can create a resonant condition which may beannoying to the residents of the top floor apartments.Field experience has indicated the best cure for this isa soft resilient mounting between the bottom of the unitand the apartment roof to reduce interaction betweenthe units. Springs or fairly soft vibration dampening

material have been used successfully. Hard, rigid typematerial is usually not satisfactory.

Figure 9

Figure 10

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B U L L E T I N

Copeland Scroll Compressor Mounting

Compressors can be mounted either with rubbergrommets or solid mounts. Consideration must

however, be given to sound attenuation and tubingreliability. Unlike a hermetic reciprocating compressor,the scroll motor is pressed into the shell and notinternally sprung. Some tubing geometry or shockloop may be required to reduce start-up vibrationtransferred from the compressor to external tubing.

Rubber Mounts - Specially designed rubber grommetsare available for Glacier Scroll applications. Thesegrommets are formulated from a high durometer materialspecifically designed for refrigeration applications.The high durometer limits the compressors motionthereby minimizing potential problems of excessivetubing stress. Sufficient isolation is provided to prevent

vibration from being transmitted to the mountingstructure. This mounting arrangement is recommendedfor multiple compressor rack installations. See Figure11 for a detail of this mounting system.

Note: The use of standard A/C grommets is notrecommended for most Glacier installations unlessextensive vibration analysis is performed by the OEM.These softer mounts allow for excessive movementthat will result in tube breakage unless the entiresystem is properly designed.

Hard Mounts - Specially designed hard mounts arealso available for use with Glacier Scroll compressors.These can be used in applications where excessive

external vibration (such as transport applications) isexpected. See Figure 12 for illustration.

Tubing Considerations - The mounting technique usedmust be taken into consideration when designing thetubing connecting the Scroll to the remaining system.The tubing should provide enough flexibility toallow normal starting and stopping of the compressorwithout exerting excessive stress on the tube joints. Inaddition, it is desirable to design tubing with a naturalfrequency away from the normal running frequency ofthe compressor. Failure to do this can result in tuberesonance and unacceptable tubing life.

Caution: These examples are intended only asguidelines to depict the need for flexibility in tubedesigns. In order to properly determine if a design isappropriate for a given application, samples must betested and evaluated for stress under various conditionsof use including voltage and load fluctuations, andshipping vibration. Since this magnitude of testing is notpractical for many applications, the guidelines abovemay be helpful; however, the ultimate responsibility forthe reliability of a given tube design is the OEM.

Figure 11

Glacier Mounting Grommet

KIT* 527-0157-00

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B U L L E T I N

External Spring for Copelaweld Compressors

On applications where noise and vibration suppressionis critical, external spring mounts have proven to be

very effective. (See Figure 11). To be effective, thecompressor must float on the spring assembly, andthere must be a minimum of 1/16" clearance betweenthe top of the neoprene spacer and the top mountingnut.

To avoid damage in shipment, the compressor must besecurely fastened in the unit during transit.

KIT* 527-0158-00

Figure 12

Figure 13

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B U L L E T I N

Compressor

J,R,(4Foot)

J,R,(3Foot)

CRZ-CRK,

CRL

I,CRMI,

B,QR

ZR90-ZR16M

StiffTandem,ZZ

HardRackMount

ZR(16K4-24K4)

Model

CS*K3,CR*6

CRP,CR

N,ZF(09-18)

ZF(22K-44K)

RackMountfor

ZF(22K-44K)

CRL3,CRM3,CS*6

ZR(18-72

),ZS(21-45)

ZS(55K-11M)

ZF(09K-18K),ZS(21K-45K)

ZS(55K-11M)

Grommet

Black

30-35Durometer

30-35Durometer

60-70Durometer

35-45

Durometer

45-55Durometer

60-70Duromete

r

60-70Durometer

SteelSpacer

027-0073-00

027-0144-00

027-0167-01

027-

0186-00

027-0137-00

027-0268-00

027-0186-02

027-0280-00

027-0262-00

027-0283-00

Brown

45-50Durometer

RubberPad

027-0167-00

027-0115-00

Sleeve

N/A

1.1

6IN

1.0

5IN

1.0

5IN

1.1

6IN

1.1

4IN

1.1

2IN

1.1

6IN

1.1

6IN

027-0072-00

028-0188-01

028-0188-01

028-

0188-02

030-0142-02

030-0142-000

028-0188-02

028-0188-02

1.0

5IN

1.1

6IN

1.1

6IN

027-0072-01

028-0188-02

028-0188-02

1.1

3IN

027-0072-02

SeeFigure11

SeeFigure12

*Standard

Note:Allsleevesdesignedfor5/16mountingstud

Table2

COPELA

WELDMOUNTINGPARTS

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B U L L E T I N

CompressorModel

AssemblyNumber

Grommet SleeveNumberRequired

J, R (4 Foot) 527-0039-04 027-0073-00 027-0072-02 4

J, R (3 Foot) 527-0039-05 027-0073-00 027-0072-02 3

S, CRZ-CRKCRL3, CRM3, ZR16-ZR24

CR*6, CS*6, CS*3527-0044-08 027-0167-00 028-0188-02 4

CRL1, CRM1, CRP,CRN, ZF(09-18)K

ZS(21-45)K, ZR(18-72)K527-0116-00 027-0186-00 028-0188-02 4

B, QR 527-0156-00027-0137-00

027-0283-00

030-0142-02

ZR90K - ZR16MZF (22K-44K)ZS (55 - 11M)

527-0159-00027-0137-00027-0268-00

030-0142-00 4

ZZ TandemStiff Rack Mount

ZF(09-18)KZS(21-45)K

527-0157-00 027-0186-02 028-0188-02 4

Hard Rock MountZF(22K-44K)

ZS (55K-11M)527-0158-00

Rubber Pad027-0115-00

027-0280-00

Steel Spacer

N/A 4

Table 3

Standard Mounting Assemblies

Table 4Spring Mounting Assemblies

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Table 5

Vendor Sources for Mounting Parts

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8 21/32

Mounting OptionsFigure 14

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Mounting OptionsFigure 14 (cont.)

J Mounting

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