Emerson Copeland Scroll ZB KC Series Application Engineering Bulletin Download

Page: 8 / 10

AE-1318 R1

Application Engineering

027-0115-00

102-0119-00

027-0280-00

KIT #527-0158-00

RUBBER PAD

WASHER

STEEL SPACER

Figure 4

7.5 - 15 HP Rack Mounting

Immediately after system start-up the oil reservoir level
will fl uctuate until equilibrium is reached. It is advisable
to monitor the oil level during this time to assure
suffi cient oil is available. This will prevent unnecessary
trips of the oil control system.

Note: If oil management problems are occurring
please refer to AE 17-1320 or contact the Emerson
Climate Technologies Application Engineering
Department.

Note: ZB50, 58, 66, 76, 88, 95, 114 are not
approved for rack applications due to compressor
limitations.

Compressor Mounting

Compressor mounting must be selected based on
application. Consideration must be given to sound
reduction tubing reliability. Some tubing geometry or
“shock loops” may be required to reduce vibration
transferred from the compressor to external tubing.

Mounting for Rack Systems

Specially designed steel spacers and rubber isolator
pads are available for our refrigeration scroll 7.5-15 HP
scroll rack applications. This mounting arrangement
limits the compressors motion thereby minimizing
potential problems of excessive tubing stress. Suffi cient
isolation is provided to prevent vibration from being
transmitted to the mounting structure. This mounting
arrangement is recommended for multiple compressor
rack installations. See

Figure 4

for a detail for this

mounting system.

Note: The use of standard soft grommets is not
recommended for our refrigeration scroll rack
installations. These “softer” mounts allow for
excessive movement that will result in tube breakage
unless the entire system is properly designed.

Connection Fittings

There are various connection fi ttings available for
Copeland Scroll refrigeration compressors. The
various options are shown in

Table 8

Three Phase Scroll Compressors – Directional
Dependents

Scroll compressors are directional dependent; i.e. they
will compress in one rotational direction only. Three
phase Scrolls will rotate in either direction depending
on power phasing. Since there is a 50/50 chance
of connected power being “backwards”, contractors
should be warned of this. Appropriate instructions or
notices should be provided by the OEM. To eliminate
the possibility of reverse rotation a Copeland Phase
Control line monitor, P/N 085-0160-00, or other phase
monitor is recommended.

Verifi cation of proper rotation can be made by observing
that the suction pressure drops and the discharge
pressure rises when the compressor is energized.
Additionally, if operated in reverse the compressor is
noisier and its current draw is substantially reduced
compared to tabulated values.

TABLE 8

Model

Rotalock Spud

Connection

Stub

Connection

Suction

Discharge

Suction

Discharge

ZB50

1-3/4 - 12

1-1/4 - 12

1-1/8"

7/8"

ZB58

1-3/4 - 12

1-1/4 - 12

1-1/8"

7/8"

ZB66

1-3/4 - 12

1-1/4 - 12

1-3/8"

7/8"

ZB76

1-3/4 - 12

1-1/4 - 12

1-3/8"

7/8"

ZB88

1-3/4 - 12

1-1/4 - 12

1-3/8"

7/8"

ZB95

1-3/4 - 12

1-1/4 - 12

1-3/8"

7/8"

ZB114

1-3/4 - 12

1-1/4 - 12

1-3/8"

7/8"

ZB56

1-3/4 - 12

1-1/4 - 12

not offered

ZB68

1-3/4 - 12

1-1/4 - 12

not offered

ZB75

1-3/4 - 12

1-1/4 - 12

not offered

ZB92

1-3/4 - 12

1-1/4 - 12

not offered

ZB11M

2-1/4 - 12

1-3/4 -12

not offered

Summary of Contents for Copeland Scroll ZB KC Series

Page 1: ...ion e g ZB92KC produces approximately 92 000 Btu H For actual compressor performance information please visit Emerson Climate Technologies Online Product Information at www emersonclimate com Operating Envelope The Copeland Scroll refrigeration models can be used with a variety of refrigerants Table 1 shows these selection options The operating envelopes are depicted in Figures 1A 1B 1C 1D 1E and ...

Page 2: ...ycle operation conditions accumulators may not be required An accumulator is required on single compressor systems when the charge limitations exceed those values listed in Table 2 On systems with defrost schemes or transient operations that allow prolonged uncontrolled liquid return to the compressor an accumulator is required unless a Figure 1D ZB KC excluding ZB95KC ZB114KC Application Envelope...

Page 3: ...r Crankcase heaters are required on systems when the system charge exceeds the recommended charge limit See Table 2 The listed crankcase heaters Table 3 are intended for use only when there is limited access The heaters are not equipped for use with electrical conduit Where applicable electric safety codes require heater lead protection a crankcase heater terminal box should be used Recommended cr...

Page 4: ...re Controls Both high and low pressure controls are required and the following are the minimum and maximum set points Refer to Table 4 for proper settings IPR Valve The 7 through 15 horsepower refrigeration scroll compressors DO NOT have an internal high pressure relief valve To provide safe operation a high pressure control set no higher than 445 psig must be used in all applications reference Ta...

Page 5: ...effect upon the long term contact resistance of the relay and may result in false compressor trips PLC operated control circuits may not always provide this minimum current In these cases modifications to the PLC control circuit are required Consult your application engineering department for details Phase Protection The INT69SCY module provides phase protection for the compressor The module sense...

Page 6: ...g leads CAUTION Use an Ohmmeter with a maximum TABLE 6 Emerson P N 071 0520 07 071 0520 05 071 0620 00 071 0641 00 Manufacturer P N T I 30AA201E Kriwan 69SC DV Kriwan 69SCY Kriwan 69SU T1 T2 Module Power Voltage Supply 120V 240V 120V 240V 120V 240V 120V 240V Frequency 50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 50Hz 60Hz M1 M2 Module Output Contacts Maximum Voltage N A 250VAC 250VAC 250VAC Maximum Current 5 Amp...

Page 7: ...n the module is faulty and should be replaced Oil Type Polyol ester lubricant POE must be provided if the refrigeration scroll is used with HFC refrigerants Copeland Scroll refrigeration compressors intended for use with R22 are supplied with mineral oil Reference Table 7 for proper oil charge See Form 93 11 for a complete list of all Emerson approved lubricants Oil Management for Single Compresso...

Page 8: ...tem Note The use of standard soft grommets is not recommended for our refrigeration scroll rack installations These softer mounts allow for excessivemovementthatwillresultintubebreakage unless the entire system is properly designed Connection Fittings There are various connection fittings available for Copeland Scroll refrigeration compressors The various options are shown in Table 8 Three Phase S...

Page 9: ... and oil mixture could ignite as it escapes and contacts the brazing flame It is important to check both the high and low sides with manifold gauges before unbrazing or in the case of assembly line repair remove refrigerant from both the high and low sides Instructions should be provided in appropriate product literature and assembly line repair areas Hi Pot Testing Copeland Scroll compressors are...

Page 10: ...icable reserve the right to modify the design or specifications of such products at any time without notice Emerson does not assume responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any Emerson product remains solely with the purchaser or end user CAUTION POE must be handled carefully and the proper protective equipment gl...

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