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© 2015 Emerson Climate Technologies, Inc.
AE4-1365 R4
Introduction
The 70 frame ZP*K3 and ZP*KC Copeland Scroll
™
compressors are designed for a wide variety of light
commercial cooling and heat pump applications. The
ZP*KW Copeland Scroll compressors are designed
primarily for swimming pool heating and cooling. This
bulletin describes the operating characteristics, design
features, and application requirements for these
models.
For additional information, please refer to the online
product information accessible from the Emerson
Climate Technologies website at
Operating principles of the Copeland Scroll compressor
are described in
Figure 8
of this bulletin.
The ZP*K3 and ZP*KC scrolls range in size from
50,000 to 57,000 Btu/hr (14.7 to 16.7 kW) and 61,000
to 147,000 Btu/hr (17.9 to 43.1 kW) respectively. These
models include all of the standard 50 and 60 Hertz, three
phase voltages and some single phase voltages. The
ZP*KW scrolls are single-phase only scrolls in 70,000
and 83,000 Btu/hr (20.5 and 24.3 kW) displacements.
All of the compressors covered in this bulletin are in
the 70 frame family (7" diameter shell) and include a
number of features outlined in the matrix below.
Nomenclature
The model numbers of the Copeland Scroll compressors
include the approximate nominal 60 Hz capacity at
standard operating conditions. An example would be
the ZP67KCE-TFD, which has 67,000 But/hr (19.6kW)
cooling capacity at the AHRI high temperature air
conditioning rating point when operated at 60 Hz. Note
that the same compressor will have approximately 5/6 of
this capacity or 55,000 Btu/hr (16.1kW) when operated
at 50 Hz. Please refer to the on-line product information
at
APPLICATION CONSIDERATIONS
The following application guidelines should be
considered in the design of a system using ZP*K3,
ZP*KC, and ZP*KW scroll compressors. Some of the
guidelines are recommended in this bulletin for good
practice or best in class, other guidelines must be
followed to ensure a safe and reliable application. The
Application Engineering department always welcomes
suggestions that will help improve these types of
documents.
Internal Pressure Relief (IPR) Valve
NOTICE
The ZP91KC through ZP143KC compressors do
not have IPR valves.
All other compressors in this family have an internal
pressure relief valve which is located between the high
and low side of the compressor. It is designed to open
when the discharge-to-suction pressure differential
exceeds 550 to 625 psid (38-43 bar). When the valve
opens, hot discharge gas is routed back into the area
of the motor overload to cause a trip. During fan failure
testing, system behavior and operating pressures will
depend on the type of refrigerant metering device.
Fixed orifice devices may flood the compressor with
refrigerant, and thermostatic expansion devices will
attempt to control superheat and result in higher
compressor top cap temperatures. Fan failure testing
or loss of air flow in both cooling and heating should
be evaluated by the system designer to assure that the
compressor and system are protected from abnormally
high pressures.
Model
Application
IPR
Valve
Discharge Temp Protection
Internal
Overload
Electrical
Connections
AC
HP
TOD
ASTP
ZP50-57K3
X
X
X
X
X
MP, QC, TB
ZP61-83KC
X
X
X
X
X
MP, QC, TB
ZP91KC
X
X
X
X
MP, TB
ZP104-122KC
X
X
X
X
MP, TB
ZP70-83KW
Pool Heating/Cooling
X
X
X
MP, TB
ZP143KC
X
X
X
X
MP, TB
MP = Molded Plug, QC = 1/4" Quick Connect Terminals, TB = Terminal Block
