Emerson Copeland Scroll ZP K3 Series User Manual

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© 2016 Emerson Climate Technologies, Inc.
AE4-1303 R15
compressor sight-glasses when the OEL is used, or in
the sight-glass on the TPTL. If oil is not visible, additional
oil should be added to the system.
Suction and discharge tandem manifolds are not
designed to support system piping. Support means
must be provided by the system designer to support
suction and discharge lines so that stress is not placed
on the manifolds.
The compressors in a manifolded set can be started/
stopped in any desired sequence. To help reduce
inrush current, starting the compressors individually is
recommended.
Please consult with Application Engineering during
the development of systems with trio compressor
assemblies. Trio compressor assemblies are
sensitive to system operating conditions and
congurations which will affect oil balancing. Trio
compressor assemblies must be qualied for each
application.
Motor Overload Protection
Models with Electrical Code TF
Models with an "F" in the electrical code (i.e. ZP120KCE-
TFD), have an internal line break motor overload located
in the center of the Y of the motor windings. This
overload disconnects all three legs of the motor from
power in case of an over-current or over-temperature
condition. The overload reacts to a combination of motor
current and motor winding temperature. The internal
overload protects against single phasing. Time must be
allowed for the motor to cool down before the overload
will reset. If current monitoring to the compressor is
available, the system controller can take advantage
of the compressor internal overload operation. The
controller can lock out the compressor if current draw
is not coincident with contactor energizing, implying that
the compressor has shut off on its internal overload.
This will prevent unnecessary compressor cycling on
a fault condition until corrective action can be taken.
Models with Electrical Code TW* or TE*
WARNING
The electronic motor protection module is a U.L.
recognized safety device and must be used with
all compressors that have TW* electrical codes
and TE* electrical codes respectively.
Models with a "W" or "E" in the electrical code (i.e.
ZP182KCE-TWD) have a motor overload system
that consists of an external electronic control module
connected to a chain of four thermistors embedded in
the motor windings. The module will trip and remain off
for a minimum of 30 minutes if the motor temperature
exceeds a preset point.
Note: Turning off power to the module will reset it
immediately.
The module has a 30 minute time delay to allow the
scrolls to cool down after the motor temperature limit has
been reached. CAUTION Restarting the compressor
sooner may cause a destructive temperature build
up in the scrolls. For this reason, module power must
never be switched off with the control circuit voltage.
Since the compressor is dependent upon the contactor
to disconnect it from power in case of a fault, the
contactor must be selected in accordance with AE10-
1244. The contactor must meet both the Rated Load
Amps(RLA)andLockedRotorAmps(LRA)specied
for the compressor.
APPLICATION TESTS
Application Test Summary
There are a minimal number of tests the system
designer will want to run to ensure the system operates
as designed. These tests should be performed during
system development and are dependent on the
system type and amount of refrigerant charge. These
application tests are to help identify gross errors in
system design that may produce conditions that could
lead to compressor failure. The Continuous Floodback
Test and Field Application Test, both outlined below, are
two tests to run to help verify the design. When to run
these tests can be summarized as follows.
For manifolded compressor assemblies, oil balancing
tests must be performed to demonstrate oil balancing
between the compressors. Compressors with sight-
tubes for viewing a wide range of oil levels is appropriate
for this type of testing. The least amount of testing will
evaluatetheminimumandmaximumowconditionsat
which the compressors will be required to operate, with
min and max suction superheat.
Continuous Floodback:
Required for all air-source heatpumps.
Field Application Test:
Required for any unit where both the design system

Emerson Copeland Scroll ZP K3 Series Specifications

General

Brand	Emerson
Model	Copeland Scroll ZP K3 Series
Category	Air Compressor
Language	English