ae4-1111 - mounting parts for copeland™ compressors · ae4-1111 r25 copeland scroll compressor...

AE4-1111 R25 May 2015

Mounting Parts for Copeland™ Compressors

Several different mounting assemblies are used with

Copelametic™, Copeland™ welded, and Copeland

Scroll™ motor-compressors. The following information

should be used as a guide in the application and

installation of these mounting assemblies.

Vendor sources for mounting components are provided

in Table 5 for those system manufacturers who want to

obtain the parts directly from the manufacturer.

Copelametic Compressors

When mounting the “H” and “K” model Copelametic

motor compressors, the spring type mounting

assembly shown in Figure 1 should be used.

When units using this mounting assembly are

shipped from the factory, the motor-compressors

are rigidly secured to the base by the mounting

components. Before these units are put into operation

the top mounting nut must be loosened to allow the

compressor to float on the mounting springs. (Allow

approximately 1/16" between the upper nut and the

neoprene spacer).

The mounting assemblies for “H” and “K” com pressors

Figure 1 Mount is shown in properly adjusted position. (See Table 1 for Usage)

© 2015 Emerson Climate Technologies

require a special locking device to prevent rotation of

the mounting bolt and for this purpose an extra hole

must be drilled in the base for each mounting assembly

as shown in Figure 2.

The mounting assemblies shown in Figure 3 should

be used with all Copelametic motor-compressors

larger than the “K” models. This assembly is somewhat

similar to the assembly in Figure 1, but the neoprene

spacers used with this assembly are not to be in place

during transit. Before units using this assembly are put

into operation, the top mounting nuts must be removed;

one neoprene spacer placed on each mounting bolt,

and the mounting nut replaced leaving 1/16" space

between the upper mounting nut and neoprene spacer

as shown in Figure 3. (Four neoprene spacers will be

found attached to the compressor body).

The above method of mounting prevents the

transmission of noise while also preventing excessive

movement during starting and/or stopping of the

motor-compressor.

When installing motor-compressors which use the

mounting assembly shown in Figure 3, the shipping

spacer is to be in place during shipment to insure

maximum support for the compressor body during

transit. Before the unit is put in operation, the shipping

spacer should be removed and discarded.

Resilient type mounts such as shown in Figure 4 are

used on some two-stage compressors to reduce the

magnitude and change the frequency of vibration

due to pulsation. The same type mount is used on

Figure 2

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tandem compressors in order to compensate for minor

alignment variations in the mounting rails.

For transportation type refrigeration installations, in

which the unit is subject to severe vibration, the

flexible mounts should be omitted and the compressor

mounted rigidly to the unit base. This must be done

to prevent line breakage. These solid mounts must be

perfectly level to prevent distortion of the compressor

body casting. (See Figure 5).

The individual components and mounting parts kits

for all Copelametic motor-compressors are shown in

Table 1.

Note: When replacing a compressor equipped with a

deep sump bottom plate and rear mounting foot, with

a normal sump compressor, you must re-use the deep

sump bottom plate, rear mount, and rear mounting

Figure 3 © 2015 Emerson Climate Technologies

spacer and bolts, or purchase these components new.

Replace bottom plate gasket. The compressor line set

hook up will be affected if the incorrect components

are used in a deep sump application. You also must

remove the oil strainer plug and screen from the new

compressor. In its place you must install a new fitting

plug, bolt, O-ring, gasket, and spring into the hole in

the replacement compressor. The compressor will not

circulate oil properly if this is not done.

Note: The old deep sump compressor should be

equipped with a plug, bolt, gasket, O-ring, and spring.

These can be re-used if undamaged.

Figure 4

527-0120-00 Mounting Kit No. Figure 5

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AE4-1111 R25

© 2015 Emerson Climate Technologies 3

Table

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ontinued

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AE4-1111 R25


AE4-1111 R25

Copeland Welded Compressors

All current production Copeland welded compressors

are internally spring mounted (with the exception of

ZR Compliant Scroll) to reduce vibration.

Resilient type external mounts have been developed

specifically for each compressor model after extensive

testing. The exact characteristics of each mount vary

depending on the weight, configuration, and vibration

characteristics of the compressor on which it is used.

Typical mounting assemblies are shown in Figures

6, 7, 8. Mounting part numbers for each model are

given in Table 2. Dimensions for the locations of the

holes required for each compressor mounting option

are shown in Figure 12.

On smaller single cylinder compressors, a softer

rubber mount can be used (a lower durometer rating)

since the weight involved is not great, but provisions

must be made for adequate dampening of lateral

movement due to the inherent characteristics of a

single cylinder compressor.

Larger compressors normally take a somewhat stiffer

mount (higher durometer rating) because of their

weight, but have more natural balance due to multiple

cylinder operation.

In general, rubber in shear provides better dampening

of vibration than rubber in compression, and the

rubber grommet is designed to provide as much shear

Figure 6 © 2015 Emerson Climate Technologies

stress as possible.

Occasionally, system manufacturers desire to use

one mounting for standardization purposes, even

though they may be using different compressors in

production. It is possible that a given mount may not be

compatible with different compressor characteristics,

and may not adequately attenuate vibration and noise

transmission. If a customer wishes to use a different

mount than the standard Copeland mounting specified,

the replacement mounting must be carefully tested

Figure 7

Figure 8

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by the customer to make certain that its use will not

result in excessive vibration, noise, and movement.

It is most important that the mount not be placed in

lateral compression by the compressor mounting foot.

Noise and vibration isolation may be affected by the

rigidity of the unit frame, the compressor mounting

foot configuration, or the refrigerant piping. In some

cases, a change in grommet durometer may be helpful

in obtaining more effective isolation, but generally this

can only be determined by comparative testing during

unit development.

The metal sleeve inside the rubber grommet is

intended as a guide to hold the grommet in place. It is

not designed as a load bearing member, and excessive

torquing of the mounting nut can collapse the sleeve.

It is critically important that the rubber grommet not

be compressed by the washer, and a clearance space

of approximately 1/16" between the bottom of the

washer and the top of the grommet is recommended

(see Figure 9). Although this space is determined by

the length of the sleeve, it is possible that the proper

sleeve length may be determined by the type of

mounting stud. Weld studs, for example, may have a

projection around the base of the stud affecting the

seating of the sleeve. It is essential that the sleeve

be firmly supported on an even base, and a rounded

projection around the base of the stud causing the

sleeve to tilt at an angle can have detrimental effects

on noise and vibration transmission.

Figure 9 © 2015 Emerson Climate Technologies 6

Some users have developed mounting studs with

shoulders to support the washer, and with a grommet

having a straight through hole the size of the mounting

stud, the inner sleeve can be eliminated.

When installing these mounting assemblies the holes

for the mounting bolts must be spaced correctly and

located squarely. For this reason it is suggested a

template with holes very nearly the size of the mounting

bolts be used giving the correct location of the bolts

when the mounting assemblies are installed.

Washers used with resilient mounts for Copeland

welded compressors must be properly sized to

prevent the washer from slipping over the metal sleeve

compressing the grommet. To avoid this problem,

a lock-nut with integral washer is recommended for

fastening the mounting assembly on weld studs. (See

Figure 10).

Even though the compressor is properly mounted

in the unit to minimize noise and vibration, it is still

possible that pulsation and noise can be transmitted

from the unit to the building where it is installed. This

is particularly a problem on split system condensing

units mounted on the roofs of multi-story apartment

houses where the roof construction may be less rigid

than industrial construction. Single units in operation

seldom create a problem, but a combination of several

units in operation at once in fairly close physical

proximity can create a resonant condition which may be

annoying to the residents of the top floor apartments.

Field experience has indicated the best cure for this is

a soft resilient mounting between the bottom of the unit

and the apartment roof to reduce interaction between

the units. Springs or fairly soft vibration dampening

material have been used successfully. Hard, rigid type

material is usually not satisfactory.

Figure 10

AE4-1111 R25

Copeland Scroll Compressor Mounting

Compressors can be mounted either with rubber

grommets or solid mounts. Consideration must

however, be given to sound attenuation and tubing

reliability. Unlike a hermetic reciprocating compressor,

the scroll motor is pressed into the shell and not

internally sprung. Some tubing geometry or “shock

loop” may be required to reduce start-up vibration

transferred from the compressor to external tubing.

Rubber Mounts - Specially designed rubber grommets

are available for Glacier Scroll applications. These

grommets are formulated from a high durometer

material specifically designed for refrigeration

applications. The high durometer limits the

compressors motion thereby minimizing potential

problems of excessive tubing stress. Sufficient

isolation is provided to prevent vibration from being

transmitted to the mounting structure. This mounting

arrangement is recommended for multiple compressor

rack installations. See Figure 11 for a detail of this

mounting system.

Note: The use of standard A/C grommets is not

recommended for most Glacier installations unless

extensive vibration analysis is performed by the OEM.

These “softer” mounts allow for excessive movement

that will result in tube breakage unless the entire

system is properly designed.

Hard Mounts - Specially designed hard mounts are

also available for use with Glacier Scroll compressors.

These can be used in applications where excessive

external vibration (such as transport applications) is

expected. See Figure 12 for illustration.

Tubing Considerations - The mounting technique used

must be taken into consideration when designing the

tubing connecting the Scroll to the remaining system.

The tubing should provide enough “flexibility” to

allow normal starting and stopping of the compressor

without exerting excessive stress on the tube joints. In

addition, it is desirable to design tubing with a natural

frequency away from the normal running frequency of

the compressor. Failure to do this can result in tube

resonance and unacceptable tubing life.

Caution: These examples are intended only as

guidelines to depict the need for flexibility in tube

designs. In order to properly determine if a design is

appropriate for a given application, samples must be

tested and evaluated for stress under various conditions

of use including voltage and load fluctuations, and

shipping vibration. Since this magnitude of testing is not

practical for many applications, the guidelines above

may be helpful; however, the ultimate responsibility for

the reliability of a given tube design is the OEM.

Figure 11


AE4-1111 R25

External Spring for Copeland Welded Compressors

On applications where noise and vibration suppression

is critical, external spring mounts have proven to be

very effective. (See Figure 11). To be effective, the

compressor must float on the spring assembly, and

there must be a minimum of 1/16" clearance between

the top of the neoprene spacer and the top mounting

nut.

To avoid damage in shipment, the compressor must be

securely fastened in the unit during transit.

KIT* 527-0158-00

Figure 12

Figure 13


Table 2 COPELAWELD MOUNTING PARTS

Compressor J, R, (4 Foot) J, R, (3 Foot) CRZ-CRK, CRLI, CRMI, B, QR ZR90-ZR16M Stiff Tandem, ZZ Hard Rack Mount ZR(16K4-24K4)

Model CS*K3, CR*6 CRP, CRN, ZF(09-18) ZF(22K-44K) Rack Mount for 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 - 35 Durometer 30 - 35 Durometer 60 - 70 Durometer 35 - 45 Durometer 45 - 55 Durometer 60 - 70 Durometer 60 - 70 Durometer Steel Spacer

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 45-50 Durometer Rubber Pad

027-0167-00 027-0115-00

Sleeve N/A

1.16IN 1.05IN 1.05IN 1.16IN 1.14IN 1.12IN 1.16IN 1.16IN

027-0072-00 028-0188-01 028-0188-01 028-0188-02 030-0142-02 030-0142-000 028-0188-02 028-0188-02

1.05IN 1.16IN 1.16IN

027-0072-01 028-0188-02 028-0188-02

1.13IN 027-0072-02

See Figure 11 See Figure 12

* Standard

Note: All sleeves designed for 5/16” mounting stud

AE4-1111 R25

Table 3 Standard Mounting Assemblies

Compressor Model

Assembly Number

Grommet

Number Sleeve

Required

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-CRK CRL3, CRM3, ZR16-ZR24 527-0044-08 027-0167-00 028-0188-02 4

CR*6, CS*6, CS*3

CRL1, CRM1, CRP, CRN, ZF(09-18)K 527-0116-00 027-0186-00 028-0188-02 4

ZS(21-45)K, ZR(18-72)K

B, QR 527-0156-00 027-0137-00 027-0283-00

030-0142-02

ZR90K - ZR16M ZF (22K-44K) ZS (55 - 11M)

027-0137-00 527-0159-00

027-0268-00

030-0142-00 4

ZZ Tandem Stiff Rack Mount ZF(09-18)K

ZS(21-45)K

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

Hard Rock Mount ZF(22K-44K)

ZS (55K-11M)

527-0158-00

Rubber Pad 027-0115-00 027-0280-00 Steel Spacer

N/A 4

Table 4 Spring Mounting Assemblies


AE4-1111 R25

Table 5 Vendor Sources for Mounting Parts


AE4-1111 R25 8 21/32

Mounting Options Figure 14


AE4-1111 R25 J Mounting

Mounting Options Figure 14 (cont.)


The contents of this publication are presented for informational purposes only and are not to be construed as warranties or guarantees, express or implied, regarding

the products or services described herein or their use or applicability. Emerson Climate Technologies, Inc. and/or its affiliates (collectively "Emerson"), as applicable,

reserve the right to modify the design or specifications of such products at any time without notice. Emerson does not assume responsibility for the selection, use or

maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson product remains solely with the purchaser or end user.

The contents of this publication are presented for informational purposes only and are not to be construed as warranties or guarantees, express or

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