AE4-1111 - Mounting Parts for Copeland™ Compressors · AE4-1111 R25 Copeland Scroll Compressor...
Transcript of 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
2
Table
1
Copela
metic
Com
pre
ssor
Mounting P
art
s a
nd K
its
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Table
1 C
ontinued
Copela
metic
Com
pre
ssor
Mounting P
art
s a
nd K
its
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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
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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
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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
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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
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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
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Table 5 Vendor Sources for Mounting Parts
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Mounting Options Figure 14
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AE4-1111 R25 J Mounting
Mounting Options Figure 14 (cont.)
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