INTRODUCTION
This bulletin provides instructions on how to apply a
Copeland Scroll
™
variable speed compressor in a safe
and reliable manner. The Copeland Scroll variable
speed compressor will be referred to throughout this
bulletin as the 'variable speed scroll' or the
'compressor.'
Product Description
ZPV066 and ZPV096 variable speed compressors are
intended for use in commercial air conditioning, chiller,
and heat pump applications. The variable speed scrolls
utilize three-phase brushless permanent magnet
(BPM) motors. The compressors have been qualified
for use with Emerson
™
EVC Drives which have been
developed and qualified for BPM motor-compressors.
The Emerson drives offer the highest level of
compressor protection through the use of CoreSense
™
protection algorithms. If use of a non-Emerson drive is
desired, please work with Application Engineering to
select an appropriate drive for the compressor
application. See Third Party Drive requirements on
the following page.
Compressor Data
Compressor mechanical, electrical, and performance
data are available online in Online Product Information
at Emerson.com/OPI. From this site, compressor
drawings (PDF format) can be downloaded. Other
drawing formats (IGES, DXF, and STP) can be
obtained by contacting your Application Engineer.
Other performance data available to the system
designer includes sound, vibration, and coefficient data
for the polynomial equation used to represent tabular
performance data.
Power Supply
The compressor and drive are an integral and
optimized combination. The drive will convert the input
voltage into a variable frequency and voltage to power
the compressor. For more information on the drive
power input requirements please see the Emerson
EVC Drive user guide.
Ensure correct wiring at both the compressor and drive
connections prior to starting the compressor to avoid a
mis-wire or powered reverse situation. These situations
may cause compressor damage.
The variable speed compressor must be paired
with the appropriate variable speed drive. Do not
connect the power supply directly to the
compressor.
Nomenclature
The model number of the variable speed scroll
includes the approximate displacement in cubic
centimeters per revolution. Figure 1 provides a
complete explanation of all of the alpha and numeric
characters in the compressor model number.
Agency Approval
ZPV066 and ZPV096 compressors are U.L. recognized
in file SA2337, Volume 22. When the compressor is
used with the Emerson EVC, the compressor and drive
are a U.L. listed 508C package. The package is listed
in file SA2337, Volume 22.
OEM LAB TESTING
Application Engineering should be consulted during the
design, development, and production launch of the
variable speed system to help ensure that the variable
speed scroll is applied as intended, in a safe and
reliable manner.
Modeling System Performance
Modeling at any speed range in the approved envelope
is facilitated by 20 coefficient data available from
Application Engineering.
COMPRESSOR DESIGN FEATURES
The variable speed scroll has a number of design
features that improve efficiency and reliability. Figure 7
shows the internal features that are unique to the
variable speed scroll.
Compressor Motor
The brushless permanent magnet (BPM) motor in the
variable speed scroll consists of a three-phase stator
and a rotor embedded with high energy permanent
magnets. The input voltage is a series of pulses of
varying frequency at 120 degree intervals between
phases.
Oil Pump
The variable speed scroll is equipped with an oil pump
to ensure an adequate supply of oil to the bearing
system throughout the operating speed range.
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