Mounting Parts; Single Phase Starting Characteristics; Ptc Start Components; Electrical Connections - Emerson Copeland Scroll ZP K6 Series Bulletin

Mounting Parts

ZP09-31K6 compressor have pierced mounting holes.
ZP34-54K6 compressors have extruded mounting
holes, so the grommet must have a relief cut into its
main body to accommodate the down turned lip of the
hole. Table 5 lists the mounting parts kits to be used
with these compressors. Many OEM customers buy the
mounting parts directly from the supplier, but Emerson's
grommet design and durometer recommendation
should be followed for best vibration reduction through
the mounting feet.

Single Phase Starting Characteristics

Start assist devices are usually not required, even
if a system utilizes non-bleed expansion valves.
Due to the inherent design of the Copeland Scroll
compressor, the internal compression components
always start unloaded even if system pressures are
not balanced. In addition, since internal compressor
pressures are always balanced at startup, low voltage
starting characteristics are excellent for Copeland Scroll
compressors. The starting Locked Rotor Amperage
(LRA), also referred to as inrush current, is normally
six or more times higher than the rated running
amperage of the compressor and lasts from 100 to
300 milliseconds until the rotor starts turning. This high
starting current may result in significant "sag" in voltage
where a poor power supply is encountered. Low starting
voltage reduces the starting torque of the compressor
and subsequently increases the time the compressor
is in a locked rotor condition. This could cause light
dimming. Start components will substantially reduce
start time and consequently the magnitude and duration
of both light dimming and conduit buzzing. Specified
starting components can be found in the Online Product
Information section of www.emersonclimate.com.

PTC Start Components

For less severe voltage drops or as a start boost, solid
state Positive Temperature Coefficient (PTC) devices
rated from 10 to 25 ohms may be used to facilitate
starting for any of these compressors.
SecureStart™ is marketed and sold by Emerson
Climate Technologies, Inc. to reduce inrush current
by up to 75% on single phase Copeland Scroll
compressors. SecureStart significantly reduces inrush
and associated light dimming, while offering a number
of other protective benefits. For more information on
SecureStart, please refer to AE8-1370.
© 2015 Emerson Climate Technologies, Inc.

Electrical Connections

WARNING
Molded electrical plug (Emerson p/n 529-0060-
04 or OEM equivalent) must be used in all
applications.
The orientation of the electrical connections on the
Copeland Scroll compressors is shown in Figure 4. The
molded electrical plug must be installed by hand or with
a dedicated, pneumatic installation tool. The use of a
hammer or other blunt instrument to install the plug is
strictly forbidden.

Deep Vacuum Operation

Copeland Scroll compressors incorporate internal low
vacuum protection and will stop pumping (unload) when
the pressure ratio exceeds approximately 10:1. There
is an audible increase in sound when the scrolls start
unloading.
CAUTION Copeland Scroll compressors (as with
any refrigerant compressor) should never be used
to evacuate a refrigeration or air conditioning
system. The scroll compressor can be used to pump
down refrigerant in a unit as long as the pressures
remain within the operating envelope shown in Figure
1. Prolonged operation at low suction pressures will
result in overheating of the scrolls and permanent
damage to the scroll tips, drive bearing and internal
seal. See AE24-1105 for proper system evacuation
procedures.
Suction and Discharge Fittings
Copeland Scroll compressors have copper plated steel
suction and discharge fittings. These fittings are far
more rugged and less prone to leaks than copper fittings
used on other compressors. Due to the different thermal
properties of steel and copper, brazing procedures
may have to be changed from those commonly used.
See Figure 6 for assembly line and field brazing
recommendations.

System Tubing Stress

System tubing should be designed to keep tubing
stresses below 9.5 ksi (62 MPa), the endurance limit
of copper tubing. Start, stop and running (resonance)
cases should be evaluated.
9
AE4-1400 R1