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© 2015 Emerson Climate Technologies, Inc.
AE4-1400 R1
Introduction
ZP*K6 Copeland Scroll
™
compressors are designed
with a number of patented features to deliver a 2 to
4% efciency increase over the prior generation of
Copeland Scroll compressors. ZP*K6 is designed to
helpOEMsmeet2015 regionalefciency standards.
This bulletin describes the operating characteristics,
design features, and application requirements for the
ZP*K6 family of compressors.
For additional information, please refer to our Online
Product Information, accessible from the Emerson
Climate Technologies website at www.emersonclimate.
com. Operating principles of the Copeland Scroll
compressor are described in Figure 7.
The ZP*K6 compressors include a number of features
outlined in the table 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 ZP31K6E-PFV, which has 31,500 Btu/hr (9.2kW)
cooling capacity at the AHRI high temperature air
conditioning rating point when operated at 60 Hz.
Please refer to Online Product Information at www.
emersonclimate.com for details.
Application Considerations
The following application guidelines should be
considered in the design of a system using ZP*K6
scroll compressors. Some of this information is
recommended, whereas other guidelines must be
followed. The Application Engineering department will
always welcome suggestions that will help improve
these types of documents.
Internal Pressure Relief (IPR) Valve
The internal pressure relief valve 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 protector to cause a trip. During
fan failure testing, system behavior and operating
pressures will depend on the type of refrigerant metering
device.Fixedoricedevicesmayoodthecompressor
with refrigerant, and thermostatic expansion devices
will attempt to control superheat and result in higher
compressor top cap temperatures. Fan failure testing
orlossofairowinbothcoolingandheatingshould
be evaluated by the system designer to assure that the
compressor and system are protected from abnormally
high pressures.
Discharge Temperature Protection
CAUTION
Compressor top cap temperatures can be very
hot. Care must be taken to ensure that wiring or
other materials which could be damaged by these
temperatures do not come into contact with these
potentially hot areas.
The Therm-O-Disc
™
or T-O-D is a temperature-sensitive
snap disc device located between the high and low
pressure side of the mufer plate. It is designed to
open and route excessively hot discharge gas back to
the motor protector when the internal discharge gas
exceeds 275°F (135°C). During a situation such as loss
of charge, the compressor will be protected for some
time while it trips the protector. However, as refrigerant
leaksout,themassowandtheamperagedraware
reduced and the scrolls will start to overheat. A low
pressure control is recommended for loss of charge
Model
Motor
Frame Size*
Application
IPR TOD
Suction
Funnel
Transient
Sound
Solution
Improved
Sound
Quality
Electrical
Connections
AC HP
ZP10-31K6 53 X X X X X X Molded Plug
ZP34-54K6 63 X X X X X X X Molded Plug
* Approximate Shell Diameter (e.g. 53 = 5.5", 63 = 6.5")
ZP*K6 Family Features
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