68032448 Compresor Trane

1

COM-D-17-AAugust 2003

Model CSHAScroll 3-D® CompressorApplication Data

CO

M-D

-17-

A

2©American Standard Inc. 1997

General

Figure 1 — How the Scroll WorksImprovedTrane 3-D®

ScrollCompressor

The principles of operation:The suction gas is drawn into thecompressor at A. The gas thenpasses through the gap betweenthe rotor and stator, B, cooling themotor, C. The gas then enters theintake chamber, D, that encirclesthe scrolls. The oil in the suctiongas is separated by changingdirections and impinging onsurfaces within the compressorand then draining back to theoil sump.

Finally, the suction gas is drawninto the scroll assembly where it iscompressed and discharged intothe dome of the compressor. Thedome of this compressor acts as ahot gas muffler which dampens thepulsations before the gas enters thedischarge line, E.

How the Scroll Compressor WorksGeneral

A 3-D compressor has twoscrolls. The top scroll is fixed and

the bottom scroll orbits. Eachscroll has walls in a spiral shapethat intermesh.

Inlet — First OrbitAs the bottom scroll orbits, tworefrigerant gas pockets are formedand enclosed.

Discharge —Third OrbitThe gas is compressed further anddischarged through a small port inthe center of the fixed scroll.

Compression — Second OrbitThe refrigerant gas is compressedas the volume is reduced closer tothe center of the scroll.

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General 2

Model Number Description 4

General 5

Mounting 7

Refrigeration Connections 9

Electrical Connections 10

Operating Limits 11

System Protection Controls 15

Electrical Data 20

Manifolded Comp. Sets 22

System Cleanliness 36

Evacuation & Dehydration 37

Contents

Electrical PhasingSince the scroll compressor is aunidirectional device, it must beproperly phased. See “ElectricalInformation” for information ondetermining the proper electricalphasing.

SoundScroll compressors make a differentsound than reciprocating compressors.Running a scroll compressorbackwards or shutting it down cancause unusual noise.

Running BackwardsIf the compressor is runningbackwards, the compressor will benoticeably noisy. Along with the noise,the discharge pressure and suctionpressure will be about equal and thecurrent draw will be substantiallybelow the normal value expected.Switching two of the three power leadswill correct this problem.

ShutdownAt shutdown, the gas within the scrollsexpands and causes momentaryreverse rotation until the check valvecloses. This noise is minimal and maynot occur at all conditions.

DescriptionThe 3-D® scroll compressor is anominal 3500 rpm on 60 Hz and 2900rpm on a 50 Hz hermetic compressorwith a solidly mounted compressorassembly. The compressor isunidirectional and will only pumprefrigerant when the compressormotor is wired in the proper electricalphase sequence. For R-22 applications,the compressor ships with a full oilcharge. The compressor has asstandard features an oil sight glass andan oil charging valve. Compressors foruse with POE oils will ship less oil.

Scroll Compressor SpecialCharacteristicsScroll compressors have differentcharacteristics, both operating andnon-operating, than reciprocatingcompressors. Because of thesedifferences, some equipment designand manufacturing processes mayneed to be reviewed.

High Volumetric Efficiency/ConstantVolume DeviceThe scroll compressor is a constantvolume ratio device with highvolumetric efficiency. As a result, thecapacity, power and current do not falloff as rapidly at high condensing andlow suction temperatures as they do ina typical reciprocating compressor.

The scroll compressor can pull downinto a vacuum quicker than areciprocating compressor. Operatingthe scroll compressor in a vacuumcauses galling of the scroll and internalarcing of the fusite power terminals,both of which will result in acompressor failure.

CautionScroll compressors do not usedischarge or suction valves asreciprocating compressors do.Therefore, it is not necessary toperform a pumpdown or efficiency testthat pulls the compressor into avacuum. Performing this type of testwill result in a compressor failure.

When checking for compressor low tohigh-side leaks, the compressor can beused to pump the system down, but itmust not be pulled down into avacuum.

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ModelNumberDescription

Model Number Nomenclature

C S H A 1 5 0 K 0 * 0 0

1 2 3 4 5 6 7 8 9 10 11 12

Digit 1 — “C” Positive DisplacementRefrigeration Compressor

Digit 2 — “S” Scroll Compressor

Digit 3 — “H” Hermetic Compressor

Digit 4 — Compressor Model andDevelopment Sequence“A” 3450 rpm vertical welded shellmotor

Digit 5, 6, 7 — Designates Size(Nominal Tons)093 = 9.3 tons100 = 10.0 tons140 = 14.0 tons150 = 15.0 tons

Digit 8 — Voltage DesignatorA = 200-60-3R = 208/230-60-3K = 460-60-3 or 400-50-3D = 575-60-3X = 380-60-3F = 220-50-3V = 346-50-3Y = 200-50-3 (9 and 10 ton only)

Digit 9 — Capacity Control0 = Single Speed, no unloading

Digit 10 — Design Sequence, FactoryAssigned

Digit 11 — Method of Control orUnloading0 = Single Speed, no unloading

Digit 12 — Basic Compressor Variation0 = Stub tubes, oil charging valve, oil

equalizer tube, manifold bracketA = Stub tubes, oil charging valve, no

oil equalizer tube, manifold bracketB = Rotalocks with access port, oil

charging valve, no equalizer tube,manifold bracket.

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General

Servicing

Warnings are provided to alert theinstaller or service personnel of hazardsthat could result in personal injury ordeath. The instructions given in eachwarning appearing in this publicationmust be followed carefully.

Cautions are provided to alert theinstaller or service personnel thatequipment or property damage couldoccur if specific instructions are notfollowed.

WARNING:NEVER REMOVE THE COMPRESSORFROM THE UNIT WITHOUTREMOVING THE REFRIGERANTCHARGE FROM BOTH THE HIGH SIDEAND THE LOW SIDE OF THECOMPRESSOR. FAILURE TO DO SOCOULD RESULT IN SERIOUS INJURYOR DEATH BECAUSE THE ESCAPINGPRESSURIZED OIL ANDREFRIGERANT MIXTURE COULD BEIGNITED BY THE TORCH FLAME.

Since the scroll’s flanks may seal therefrigerant pressure between the highand low side preventing pressureequalization through the compressor, itis necessary to remove the refrigerantfrom both the high side and the lowside of the compressor beforeremoving the compressor from thesystem.

Shell Leak RepairsWarning:UNDER NO CIRCUMSTANCESSHOULD THERE BE ANY ATTEMPT TOREPAIR ANY HERMETICCOMPRESSOR THAT REQUIRESWELDING, BRAZING OR SOLDIERING.ANY COMPRESSOR THAT REQUIRESREPAIRS OF THIS TYPE SHOULD BEREPLACED. SERIOUS PERSONALINJURY OR DEATH MAY OCCUR DUETO EXPLOSION OF REFRIGERANT/AIRMIXTURE, FIRE DUE TO THEPRESENCE OF OIL UNDER PRESSURE,EXPLOSION DUE TO THE INCREASEIN PRESSURE FROM HEAT BEINGADDED TO A CLOSED VESSEL OREXPLOSION DUE TO THE REDUCTIONIN STRENGTH OF THE COMPRESSORSHELL.

THE ONLY PARTS OF THECOMPRESSOR WHERE BRAZING ISALLOWED ARE THE REFRIGERANTCONNECTIONS. BRAZING ON THEREFRIGERANT CONNECTIONSSHOULD ONLY BE DONE WHEN THEREFRIGERANT CHARGE HAS BEENREMOVED, WITH THE COMPRESSORAT ATMOSPHERIC PRESSURE ANDNITROGEN BEING PURGEDTHROUGH THE COMPRESSOR.

Oil Charge/TypeThe compressor ships with a fullcharge of mineral oil suitable for usewith R-22. The amount of oil charge islisted in Table 1 - General Data. Theapproved oil for the Trane CSHA 3-D®

scroll is Trane Part Number OIL 0042. Itcontains a special additive and mustnot be substituted.

When compressors are applied usingrefrigerants R-134A, R-404a andR-407C, a POE oil is required. Whenordered for use with these refrigerants,the compressor will ship without oil.The approved POE oil is ICI EmkarateRL32HB. See Table 1- General Data forthe quantity required for eachcompressor.

Oil LevelThe level in the compressor sight glassthat is typically referred to as the “oillevel” is actually the level of therefrigerant-oil mixture in thecompressor. It can and will vary,depending upon the operatingcondition of the compressor. Theconditions that affect the “oil level” aresuperheat and the operatingconditions. Superheat affects the “oillevel” because it is a measure of howmuch liquid refrigerant is beingbrought back to the compressor. Themore refrigerant that is brought back tothe compressor, the higher the “oillevel.” When the compressor isoperating at a condition where therefrigerant is more miscible with therefrigerant, the oil level will be higher.When the operating conditions aresuch that the refrigerant is less misciblewith the oil, the level will be lower.

The “oil level” will also be affected bythe factors that affect oil return, such aspiping design, piping velocities,velocities in the heat exchangers andthe number of oil traps in the system.

An overcharge of oil can be detrimentalto the performance of the system. Theeffect on the efficiency of the system isdue to an increased oil circulation rateand fouling of the heat exchangesurfaces with oil. This results in thecompressor operating at a balancepoint which is less efficient.

An undercharge of oil will result in poorlubrication and eventually lead tobearing failure due to lack oflubrication.

Single CompressorDuring operation, the oil level shouldbe at a minimum in the bottom of thesight glass. If the oil level is above thesight glass, it must be determined if it isdue to refrigerant in the compressor oilsump or an overcharge of oil before theoil is removed oil.

Figure 2 — Oil Level - Single Compressor

Normal Oil Level

Minimum Oil Level

Oil Sight Glass

Multiple Manifolded CompressorsThe oil level can only be evaluatedwhen all the compressors are shut off.During operation, the oil levels willvary. Generally speaking, the oil levelwill be highest in the last compressor inthe manifolded set and lowest in thefirst compressor in the manifolded set.

The oil must be at a minimum in thebottom of the sight glass, with thecompressors shut off. If the oil level isabove the sight glass, it must bedetermined if it is due to refrigerant inthe compressor oil sump or anovercharge of oil before the oil isremoved.

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General

Table 1 — General Data

OILSOil Charge CSHA093, 100 - 8.5 pt.

CSHA140, 150 - 13.8 pt.

Oil Type - Mineral for use with R-22 Trane Part Number OIL00042 - POE for use with R-407C, R134A Trane Part Number OIL00078 (ICI Emkarate RL32HB)TEST PRESSURES:Maximum High Side Pressure 500 psigMaximum Low Side Pressure 300 psigMaximum Pressure Differential 200 psigTILT ANGLEMaximum Tilt Angle 10 Degrees from Vertical(Single Compressor only)

REFRIGERATION CONNECTIONSCSHA 093 and 100 - Sweat Discharge - 0.875” Suction - 1.375”CSHA 140 and 150 - Sweat Discharge - 1.12” Suction - 1.625”

CSHA 093 and 100 - Rotalock Discharge - 1.25-12UNF-2ACSHA 140 and 150 - Rotalock Suction - 1.75-12UNF-2A

ELECTRICAL CONNECTIONSSingle Speed - Power Connections Screw type using #10-32 x 1/2” screwsMotor Winding Thermostat 1/4 x 0.032 Male faston connectorTORQUE VALUESPower Terminal Screw 25 in-lb.Sight Glass 28 + 2 ft-lb.J-Box Cover 60 + 10 in-lb.Stabilizer Plate Mounting Bolts (Manifold Sets only) 12-14 ft-lb.Mounting Bolts - Manifold Sets only 20 + 2 ft-lb.Oil Equalizer Adapter (3 and 4 Manifold Sets only) 45 + 5 ft-lb.Rotalock Nuts 1.25” - 110/100 ft-lb.

1.75” - 155/145 ft-lb.

Oil Level Lower

During OperationOil Level Higher

DownstreamOil Sight Glass

UpstreamOil Sight Glass

Suction Gas Flow

Figure 3 — Oil Level for Manifolded Compressors

Normal Oil Level

Minimum Oil Level

Oil Sight Glass

Off Adding or Removing oilBefore adding or removing oil, operatethe system at full load, then proceed topump the system down to no lowerthan 5 psig. This will boil off refrigerantin the oil and give a morerepresentative oil level in thecompressor(s).

Normally oil does not need to be addedto the compressor unless there is a leakor the system has extremely long linesand many oil traps. If you are adding oiland no oil leaks are visible, alwaysconsider the fact that the oil could betrapped in the system and may returnwhen the compressor is operated.

Normally oil does not need to beremoved from the system unless it hasbeen overcharged previously.

HandlingThe compressor is equipped with alifting lug on the upper shell to facilitatehandling of only the compressorduring installation.

WARNING:THE LIFTING LUG MAY BE USEDONLY TO LIFT THE COMPRESSOR.IF THE UNIT IN WHICH THECOMPRESSOR IS INSTALLED ISLIFTED USING THE COMPRESSORLIFTING LUG, THE LUG COULDBREAK, CAUSING DAMAGE TO THEUNIT AND COMPRESSOR ORCAUSING PERSONAL INJURY ORDEATH.

Systems Test PressuresWhen pressurizing the refrigerationsystem, the test pressures must notexceed the following:Low side is 300 psig.High side is 500 psig.Maximum pressure differential is 200psig.

WARNING:NEVER USE OXYGEN, DRY AIR ORACETYLENE IN PLACE OFREFRIGERANT AND NITROGEN FORLEAK TESTING. A VIOLENTEXPLOSION MAY RESULT, CAUSINGPERSONAL INJURY OR DEATH.

ALWAYS USE A PRESSUREREGULATOR WHEN USINGNITROGEN TO PRESSURE TEST.FAILURE TO DO SO WILL RESULT INEXTREMELY HIGH PRESSURESWHICH COULD EXCEED THE BURSTPRESSURE OF THE COMPRESSOR OROTHER SYSTEM COMPONENTS,RESULTING IN PERSONAL INJURY ORDEATH.

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Mounting

Capscrew .312

Flat Washer

MountingFoot

Isolator

MountingRail orUnit Base

Sleeve

Nut

WorkingHeight

MountingFoot

Figure 4 — Isolator Installation for Single Compressor

Figure 5 — Isolator Installation for Manifolded Sets

IMPORTANT — USE OF COMPRESSORSPACERS WITH VIBRATIONISOLATION KIT.

When using the manifold isolator kit, itis important to use the spacers suppliedwith this kit to mount the compressorsto the rails that are supplied with themanifold kit. Failure to do so will causeinsufficient clearance for the upperwasher and mounting hardware. Thesespacers are only required when usingthe vibration isolator kit.

Manifolded-Set IsolatorsThe mounting isolators for use with themanifolded sets are different from theisolators used for single compressorapplication. The isolators for themanifolded set consist of an upper anda lower isolator mounted under thecompressor mounting rail, a sleeve anda spacer and washers, and cap screw.There is a different isolator kit fordepending on whether there are two,three or four compressors in themanifold kit. Table 2 lists the partnumbers for the isolator kits.

Table 2 — Isolator Kits for Manifold SetsNumber of

Manifolded Compressors Isolator Kit Part2 5710-0114-01-003 5710-0114-02-004 5710-0114-03-00

Optional resilient mounting isolatorsare recommended to minimize thetransmission of compressor vibrationto the unit. They are recommended foreither single or manifoldedapplications. However, an individualcompressor or manifolded sets can besolidly mounted to the unit, if this is arequirement for the application.

Single Compressor IsolatorsThe optional mounting kit for singlecompressor applications consists offour rubber isolators and four sleeves.The mounting hardware, 5/16” capscrew, washer and nut are provided bythe user.

Install the isolator as shown in Figure 4.For shipping, tighten the cap screwsdown against the metal sleeves. Whenthe unit is placed in operation, it isrecommended that the cap screws bebacked off enough to let the rubberisolator expand to allow thecompressor to ride freely on the rubberisolators.

Upper Isolator

ManifoldMountingRail

BraceReq’dForShipping

Capscrew.375-16 x 3.00

Sleeve

Flat Washer(1.75)

Compressor(BasePlate)

UnitBase

LowerIsolator

FlatWasher(1.75)


Capscrew.312-10x 2.00 Lock

Washer


1.20TallSpacer

The isolators are fastened to the unitusing the 3/8-inch cap screw supplied inthe isolator kit. For shipment, shippingrails or spacers are supplied that attachto the compressor mounting rails andthen attach to the unit mounting baseto eliminate excessive movement inshipping. Install the isolators as shownin Figure 5.

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Mounting

Solid Mounting IndividualCompressorsIf the requirement is to solid-mountthe compressor, solid metal spacersare available to raise the compressorabove the base to allow for clearanceof the flanges on the base plate. Thepart number for the spacers isX04010503-02-00. A quantity of fourper compressor is required. SeeFigure 6.

Figure 6 — Spacer Solid Mount

Solid Mounting of Manifold SetsIf the requirement is to solid-mount themanifold set, use the spacers that shipwith the manifold kit to mount thecompressor to the manifold base rails.See Figure 6 for the spacer that shipswith the manifold kit. The manifoldmounting rails can then be mountedsolidly to the unit base.

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RefrigerationConnections

Table 3 — Rotalock Connection Sizes - Single Compressors OnlyCompressor Nominal Size Refrigerant Connection Rotalock Size ID9/10 and 14/15 Discharge 1 1/4-12 UNF-2A 0.75 “9/10 and 14/15 Suction 1 3/4-12 UNF-2A 1.25”

Comp. Coupling Connector A B C D E F G9/10 - Discharge 1 1/4 -12 0.88 ODS 5.34 2.37 1.69 .98 1.19 .62 1.129/10 - Suction 1 3/4 -12 1.38 ODS 7.13 3.19 2.35 1.50 1.31 1.00 1.3814/15 - Discharge 1 1/4 -12 1.12 ODS 5.56 2.59 1.81 0.98 1.19 1.00 1.1214/15 - Suction 1 3/4 -12 1.62 ODS 7.35 3.41 2.57 1.50 1.31 1.00 1.38

Suction and Discharge Connections

Single Speed

The standard refrigerant connectionsare steel tubes suitable for sweat-typebraze connections. The connectionsizes are listed in General Information -Table 1. Recommended braze materialis Specification Number BAg-28 AWS/AMS.

WARNINGALWAYS PURGE NITROGENTHROUGH THE COMPRESSOR WHENBRAZING THE REFRIGERANTCONNECTIONS TO THECOMPRESSOR. FAILURE TO SOCOULD RESULT IN A FIRE OR ANEXPLOSION WHICH COULD RESULTIN PERSONAL INJURY OR DEATH.

Caution:Whenever brazing the refrigerantpiping to the compressor, always use anitrogen purge to prevent theformation of copper oxides. Thepresence of copper oxides in thecompressor is detrimental to thereliability of the compressor and willcause premature failure.

Rotalock FittingsOptional rotalock fittings with anaccess port (1/4-inch flare fitting) areavailable as a factory-installed option.The discharge access port contains a0.040 vent without a Schraeder valve.The suction access port does contain aSchraeder valve. See Table 3.

Rotalock fittings are not available forcompressors used in manifolded sets.

Optional rotalock valves are availablefor use with the optional rotalockfittings. See Figure 7.

IMPORTANT:When the optional rotalock valvesare used, the system highpressure control must beconnected to the access port onthe rotalock fitting. For properprotection of the compressoragainst running into a vacuum, itis recommended that thecompressor protection lowpressure switch be attached tothe fitting on the rotalockconnection.

Oil Equalizer Tube — ManifoldedCompressors onlyA 3/8-inch oil equalizer tube connectionis provided on the compressors usedin manifold sets.

If the compressor is for a singlecompressor application, the oilequalizer connection is not supplied onthe compressor.

WARNINGALWAYS PURGE NITROGENTHROUGH THE COMPRESSOR WHENBRAZING THE REFRIGERANTCONNECTIONS TO THECOMPRESSOR. FAILURE TO SOCOULD RESULT IN A FIRE OR ANEXPLOSION WHICH COULD RESULTIN PERSONAL INJURY OR DEATH.

Caution:Whenever brazing the refrigerantpiping to the compressor, always use anitrogen purge to prevent theformation of copper oxides. Thepresence of copper oxides in thecompressor is detrimental to thereliability of the compressor and willcause premature failure.

Figure 7 — Rotalock Valves

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ElectricalConnections

Power Connections

Caution:Use copper conductors only.Compressor terminals are notdesigned to accept other types ofconductors. Failure to do so may causedamage to the equipment.

CompressorThe electrical connections are screw-type connections. The recommendedmethod of making electricalconnections is to use a ring terminal onthe power wiring. Attach the terminalto the compressor terminal block usingthe #10-32 x 1/2-inch screws providedwith the compressor. Maximum torqueto be applied to the fastening screws is25 in-lb. See Figure 8 for the TerminalBox Layout.

Motor Winding ThermostatThe motor winding thermostat is a partof the electrical motor protectionsystem and must be used in allapplications. The motor windingthermostat uses 1/4 x .032 male fastonconnections. It is recommended that tinor silver-plated connectors be used.See Figure 8 for the location of themotor winding thermostat within thecompressor terminal box.

The motor winding thermostatprovides the primary reverse rotationprotection for the compressor motor.

Figure 8 — Compressor Terminal Box Layout

PowerConnections

Ground Stud

Motor WindingThermostatConnectionElectrical Phase Sequence

T1 = AT2 = BT3 = C

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OperatingLimits

Discharge Temperature and MotorTemperature LimitsThe operating limits of the compressordefine the boundaries of the operatingenvelope in which the compressor willoperate reliably. Operation of thecompressor outside of the operatingenvelope will decrease the operatinglife of the compressor. Figure 9 showsthe operating envelope for thecompressor for both single andmanifolded applications.

Voltage Utilization RangesThe voltage applied to the compressormotor terminals must be within theranges listed in Table 4 at start-up andduring running operation.

Table 4 — Voltage Utilization RangeElectrical Voltage VoltageCharacteristic Designator Utilization Range200-60-3 A 180-220208/230/60/3 R 187-254380/60/3 X 342-418460/60/3 K 414-508575/60/3 D 518-635200/50/3 Y 180-220(9 and 10-ton only)220/50/3 F 198-254346/50/3 V 308-381400/50/3 K 340-460

Voltage UnbalanceVoltage unbalance causes currentunbalances and increases current,resulting in the motor overheating. Themaximum allowable voltage unbalanceis two percent. Calculate voltageunbalance as follows:

% Unbalance =Max. Deviation from Average Voltage

Average VoltageX 100

Example:L1- Average Volts =236 volts 236+232 + 230/3 = 232.66

L2- Max. Deviation from232 volts Average = 236-232.66 = 3.34

L3- % Unbalance =230 volts 3.34/232.66 X 100 =1.4%

Cycle Rate LimitThe cycle rate limit should not exceed12 starts per hour. The time betweenstarts must be a minimum of fiveminutes.

The compressor should have aminimum run time of five minutes toprovide sufficient run time to cool themotor after it starts or sufficient time toreturn the oil from the system,whichever is greater. Note: Oil return isa function of system design and willvary depending on the system design.

Refrigerant Charge LimitRefrigerant Charge Limit (RCL) isdefined as the amount of refrigerant ina system which, when exceeded,requires additional measures tominimize refrigerant migration to thecompressor. Table 5 lists theRefrigerant Charge Limits for the CSHAcompressor.

Table 5 — Refrigerant Charge Limit (RCL)Compressor Model RCLCSHA 093 and 100 24 LB.CSHA 140 and 150 30 LBCSHA 180 and 200 48 LBCSHA 230,240 and 250 54 LBCSHA 280 and 300 60 LBCSHA 320 and 350 78 LBCSHA 400 84 LBCSHA 450 90 LBCSHA 500 108 LBCSHA 600 120 LB

Refrigerant Charge Limit ExceededOn systems that have more refrigerantthan the RCL limit shown in Table 5, aliquid line solenoid valve and acrankcase heater are required tominimize refrigerant migration to thecompressor. The liquid line solenoidvalve should be mounted close to theevaporator so as to use the entire liquidline for storage. It should be wired inthe control system such that it closeswhen the compressor shuts off and isimmediately opened when thecompressor starts.

Caution:Operation of a scroll compressor in avacuum will cause the fusite powerterminals to arc internally and cause amotor failure. Operating the scrollcompressor in a vacuum causes gallingof the scroll and internal arcing of thefusite power terminals, both of whichwill result in a compressor failure.

Crankcase HeaterA crankcase heater is required on allsplit systems (the evaporator orcondenser is located remotely from thecompressor) and for units where theRefrigerant Charge Limit (RCL) isexceeded. See Table 5. A crankcaseheater is used to help preventmigration of refrigerant to thecompressor during the off cycle.

Figure 9 — Compressor Operating Envelope

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Liquid Line Solenoid ValvesLiquid line solenoid valves arerequired on all split systems (theevaporator or condenser is locatedremotely from the compressor) andfor units where the RefrigerantCharger Limit (RCL) is exceeded. SeeTable 5. The liquid line solenoid shouldbe wired into the control system suchthat the liquid line solenoid valveopens immediately when thecompressor starts and closes whenthe compressor stops.

PumpdownPumpdown is not recommended.Pumpdown can cause the oil to leavethe compressor during thepumpdown cycle. Also during thepumpdown period, the compressorreceives marginal lubrication due tothe outgassing of the refrigerant fromthe oil which causes foaming.

Suction Line AccumulatorsSuction line accumulators are notrequired when using the scrollcompressor if the guidelines above arefollowed for limiting the charge(Refrigerant Charge Limit). See Table 5and Using Solenoid Valves andCrankcase heaters.

Refrigerant Piping ConsiderationsTo minimize the refrigerant availableto the compressor at start-up, thesuction line and the discharge linesshould not allow liquid refrigerant todrain by gravity into the compressor.This is especially a concern withevaporators mounted above thecompressors, which can experiencemigration during off cycles. In eithercase, it is recommended that if eitherthe evaporator or condenser is abovethe compressor that the suction line ordischarge line be trapped to preventthe flow of refrigerant directly into thecompressor.

See Figures 10a through 10j forrecommended piping configurations.

Figure 10a through 10jRecommended Piping Configurations

Figure 10a — Evaporator Above Compressor

Figure 10b — Evaporator at Same Level

Figure 10c — Evaporator Below

Figure 10d — Condenser Above Middle Connection

OperatingLimits

Compressor

Compressor

Compressor

Compressor

13

OperatingLimits

Figure 10g — Condenser Same Level Middle Connection

Figure 10h — Condenser Same Level Bottom Connection

Figure 10i — Condenser Same Level Top Connection

Figure 10j — Condenser Below(Same regardless whether the connection is Middle, Bottom or Top)

Figure 10e — Condenser Above Bottom Connection

Figure 10f — Condenser Above TopConnection

Compressor

Compressor

Compressor

Compressor

Compressor

Compressor

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NOTE:The recommended control schemefor manifolded compressors showsthe safety controls wired in series toprovide the highest degree of systemprotection. Prior approval from theOEM Products Group is required ifthe compressor safety controls arewired in individual electrical circuitsthat allow individual compressors tooperate on a manifolded set whenone has failed.

SystemProtectionControls

Figure 11 — Suggested Wiring Diagram - Single Compressor

Suggested wiring diagramsillustrating the control and protectionof single compressors andmanifolded compressor sets areshown in Figures 11 and 12respectively.

1CR = Control RelayLOR = Lockout RelayHPC = High Pressure ControlLPC = Low Pressure ControlMWT = Motor Winding ThermostatOLR = Overload RelayDTS = Discharge Temperature SwitchCPLS = Compressor Protect Low

Pressure SwitchAM = Compressor ContactorLLSLV= Liquid Line Solenoid ValveART = Antirecycle Time DelayM = Compressor MotorT1,2,3 = Motor TerminalsTstat = Temperature Control DeviceSW1 = On-Off Switch-Reset Switch

NOTE1. Under no circumstances should the

CPLS be jumpered out. Doing so willnot provide the compressor withprotection from operating into avacuum and will cause thecompressor to fail.

High Pressure ControlThe scroll compressor does not havean internal relief device. It is requiredthat a high pressure control stop thecompressor operation before thedischarge pressure of the compressorexceeds a maximum value of 405psig. Consult applicable safety codesfor the proper application and settingof the high pressure control for thespecific unit application.

The high pressure control should be amanual reset device or applied in alockout circuit that will not allow theunit to cycle on the high pressurecontrol.

If a discharge service valve is used inthe system, the high pressure controlmust be located in the unit pipingbetween the compressor and thedischarge service valve. When usingthe optional rotalock fittings with theaccess port and rotalock service valves,use the access fitting on the rotalockfitting for the high pressure controlconnection.

On manifolded compressor sets, onlyone high pressure control is requiredfor the system. Locate the highpressure switch in the commondischarge line. When using a dischargeservice valve, locate the high pressureswitch between the compressors andthe discharge service valve.

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Low Pressure ControlThe Trane 3-D® scroll compressorrequires the use of a minimum of onelow pressure switch to prevent thecompressor from operating to avacuum. A loss of charge low pressureswitch is highly recommended.

Compressor Protection Low PressureSwitch

IMPORTANTThe Compressor Protection LowPressure Switch (CPLS) is a lowpressure switch that preventsoperating the scroll compressor in avacuum. The CPLS is required toprotect the compressor from arcing ofthe fusite terminals and galling of the

Loss of Charge and PumpdownTerminationLow pressure controls are typicallyused for pumpdown termination orloss of charge protection. Sincepumpdown is not recommended withthe scroll compressor, it isrecommended that the low pressureswitch be used for loss of chargeprotection. Low pressure switches,when applied properly, provide loss ofcharge protection for both slow andrapid loss of charge. When using thelow pressure switch for loss of chargeprotection, the compressor(s) shouldbe manually locked out when the lowpressure switch opens. This willprevent rapid cycling of thecompressor(s) on the low pressureswitch.

Figure 12 — Suggested Wiring Diagram - Manifolded Compressors

scrolls by preventing the compressorfrom operating in a vacuum. Therecommended cutout setting is 5 psig.This low pressure switch should not bebypassed at any time, either duringstart-up, low ambient starts orcharging of the unit. When using theoptional rotalock fittings with theaccess port and rotalock service valves,use the access fitting on the rotalockfitting for the compressor protectionlow pressure switch connection. Alsowhen using a suction line service valveon compressors that have sweatconnections, locate this low pressureswitch between the compressor andthe service valve.

1,2,3,4 CR = Control RelayLOR = Lockout RelayHPC = High Pressure ControlLPC = Low Pressure ControlMWT = Motor Winding ThermostatOLR = Overload RelayDTS = Discharge Temperature

SwitchCPLS = Compressor Protect Low

Pressure SwitchA,B,C,DM = Compressor ContactorLLSLV= Liquid Line Solenoid ValveART = Antirecycle Time DelayM = Compressor MotorT1,2,3 = Motor TerminalsTstat = Temperature Control DeviceSW1 = On-Off Switch-Reset Switch

Manifold Sets:Two-compressor sets do not useMWT, OLR, DTS, CR, ART and LLSLV3 and 4.

Three-compressor sets do not useMWT, OLR, DTS, CR, ART andLLSLV4.

Four-compressor sets use as shown.

See Figure 28 for proper sequencing.

NOTE1. Under no circumstances should

the CPLS be jumpered out. Doingso will not provide the compressorwith protection from operating intoa vacuum and will cause thecompressor to fail.

2. Liquid Line Solenoid valvesLLSLV2,3,4 are shown forevaporator unloading only.


16

Other:The device must be manual reset andUL listed and Approved by the TraneOEM Compressor Group.

Special Note Regarding OverloadsOther Than the Trane-SuppliedOverloadsThis includes IEC overloads or otheroverload devices that are part of anintegral starter. Review of many ofthese devices has shown that they aretoo slow to properly protect thecompressor. If a device other than thesolid-state overload supplied as anaccessory by Trane is to be consideredfor use with the scroll compressor,prior approval is required by the TraneOEM Products Group. To receiveapproval, you should first review theovercurrent protection requirementslisted above and on the compressordata sheets with the manufacturer ofthe overcurrent device. The devicemust meet those requirements.

NOTE: When using the optionalrotalock fittings with the access portand rotalock service valves, the accessfitting on the rotalock fitting can also beused for the loss of charge lowpressure switch connection. Also,when using a suction line service valveon compressors that have sweatconnections, locate both the loss ofcharge low pressure switch and thelow pressure switch between thecompressor and the service valve.

Manifolded SetsThe same guidelines apply formanifolded sets as for singlecompressor applications. When usinga suction service valve with amanifolded compressor set, locateboth the compressor protection switchand the loss of charge low pressureswitch between the compressor andthe service valve.

Oil Pressure ControlsThe scroll compressor uses acentrifugal oil pump and thereforedoes not require the use of any oilpressure controls. No oil pressure tapsare available to measure or sense theoil pressure.

Motor Protection Controls

Motor Winding ThermostatThe motor winding thermostat islocated within the compressor motorand the electrical terminals for thisdevice are located in the compressorelectrical junction box. The primarypurpose of this control is to providereverse rotation protection. If thecompressor is incorrectly electricallyphased, causing it to run backwards,the motor will heat up, causing themotor winding thermostat to open.

The thermostat opens at 221 F andresets at 181 F.

Overcurrent ProtectionThe scroll compressor requires the useof an external overcurrent protectiondevice. The requirements for thecurrent protection device are asfollows:

Trip Timing:Locked Rotor — Must trip within 10seconds on a cold start at Locked RotorCurrent

Running Overcurrent Protection —Must Trip within 2 minutes at 110percent of the Maximum Must Tripcurrent.


Figure 13 — Overcurrent Protection - Trip Timing

Then submit the followinginformation to the OEM CompressorGroup:1The manufacturer’s catalog data.2The manufacturer’s catalog number ofthe selected device.3Manufacturer’s recommended setting.4The trip curve showing the trip timewith the device set for the proper musthold and must trip values shown inTable 6.5The trip curves showing the triptiming for the Locked Rotor Amps ofthe compressor.6UL Listing Number.

Caution: Failure to use an approvedovercurrent protection device will voidthe warranty of the compressor.

17


Trane Supplied Current OverloadThe solid-state overload offered as anaccessory meets these requirements.See Figure 13 for the trip timing andFigure 14 for the physical dimensions.Features of the Trane-provided solidstate overload include:

• Direct must-hold settings.• Dial markings based on actual

calibration of the device.• One device for 50/60 Hz.

Figure 14 — Current Overloads

Relay Overload — Overload Manual Reset(“A” Frame) X13280089-01 and -02

Relay Overload — Overload Manual Reset(“B” Frame) X13280090-01 and -02

• Visual overload trip indicator.• Tamperproof cover.• Manual trip feature for checking

circuitry.• Secondary single phase protection.

Maximum RLA and Overload SettingsThe Maximum RLA values shown inTable 6 are based on the NECrequirement that the must-trip currentmust not exceed 140 percent of thecompressor rated load amperage. The

Maximum RLA values are determinedby using the following equation:

Max. RLA = Max. Must Trip Current/ 1.40.

The Must-Hold Overload setting is125 percent of the Maximum RLAvalue.

The overload settings in Table 6 are forthe Trane-supplied overload deviceonly.

18

Discharge Temperature Switch (DTS)Use the operating envelopes shown inFigure 9 to determine whether adischarge temperature switch isrequired. To determine whether or notthe discharge temperature switch isrequired, review the compressoroperating envelope, along with theoperating envelope of the unit,including the low pressure switchsetting and the high pressure controlsettings. See Figure 15 for an example.Then determine the following:1Can the unit operate continuously tothe left of the lines labeled “DischargeTemperature limit”? If the answer isyes, then the Discharge TemperatureSwitch is required.2When transitory operation can occur tothe left of the line labeled “DischargeTemperature Limit,” you many want toconsider using the DischargeTemperature Switch. Consult the TraneOEM Products Group.

If it has been determined that theapplication requires a DischargeTemperature Switch for a manifoldedcompressor set, each compressor inthe set requires the use of a DischargeTemperature Switch.


Table 6 — Scroll Compressor Electrical DataCompressor Max. Rated Max. Overload Overload Overload OverloadModel/ Load Must Trip Must Hold Amp Part ModelVoltage LRA Amps Current Setting Range Number Number093 and 100200/60/3 269 42.6 59.7 53 33-66 X13280090-01 958L109

442U208/230/60/3 222/251 42.2 59.1 52 33-66 X13280090-01 958L109

442U380/60/3 142 22.4 31.4 28 15-30 X13280089-01 958L109

440U460/60/3 117 18.4 25.8 23 15-30 X13280089-01 958L109

440U575/60/3 94 14.8 20.7 18 15-30 X13280089-01 958L109

440U200/50/3 219 36.4 51 45 33-66 X13280090-01 958L109

442U220/50/3 180 32.6 45.7 40 22-44 X13280089-02 958L109

441U346/50/3 114 20.8 29.1 25 15-30 X13280089-01 958L109

440U400/50/3 110 17.9 25.0 22 15-30 X13280089-01 958L109

440U140 and 150200/60/3 409 63.5 88.9 79 50-100 X13280090-02 958L109

443U208/230/60/3 337/376 62.2 87.1 77 50-100 X13280090-02 958L109

443U380/60/3 215 33.4 46.8 41 22-44 X13280089-02 958L109

441U460/60/3 178 27.6 38.6 34 22-44 X13280089-02 958L109

441U575/60/3 143 22.1 30.9 27 15-30 X13280089-01 958L109

440U220/50/3 283 48.9 68.4 61 33-66 X13280090-01 958L109

442U346/50/3 180 31.0 43.5 38 22-44 X13280089-02 958L109

441U400/50/3 174 27 38.0 33 22-44 X13280089-02 958L109

441U

Figure 15 — Example: Determining Requirement for Discharge Temperature Switch

19


Figure 17 — Discharge Temperature Switch Installation

Figure 16 shows the discharge temperature switch and Figure 17 provides mounting, location and installation instructions.

Figure 16 — Discharge Temperature Switch

Switch Rating

Inductive Load120V - 34.8 LRA

5.8 FLA240V - 17.4 LRA

2.9 FLA

Resistive Load120V - 10 Amps240V - 5 Amps

NOTE:

1. Therm-O-Disc 37TJ Series.2. Part to be clean and free from foreign material.3. Thermostat to open at 265 F ± 8 F and close at 220 F ± 11 F. 4. Silver Contacts

20

Table 7 — Contactor SelectionMax. Rated Locked Inductive Load

Compressor Voltage Load Amps Rotor Amps Contactor Rating Amps*093 and 100 200/60/3 42.6 269 50

208/230/60/3 42.2 222/251 50380/60/3 22.4 142 30460/60/3 18.4 117 25575/60/3 14.8 94 25200/50/3 36.4 219 40220/50/3 32.6 180 40346/50/3 20.7 114 25400/50/3 17.8 110 25

140 and 150 200/60/3 63.5 409 75208/230/60/3 62.2 337/376 75380/60/3 33.4 215 40460/60/3 27.5 178 30575/60/3 22.0 143 30220/50/3 48.8 283 50346/50/3 31.0 180 40400/50/3 27 174 30

* The Locked Rotor Amperage (LRA) rating of the contactor must exceed the LRA of the compressor.

ElectricalData

Phase SequencingThe scroll compressor is aunidirectional compressor and must becorrectly electrically phased to operateproperly. Should the scroll compressorbe incorrectly phased it is designed torun backwards without damagingitself. However, the compressor will notpump refrigerant and will eventuallytrip on the motor winding thermostat.

If a phase sequence meter is notavailable, the quickest way to check forthe correct electrical phasing is to startthe compressor after the system hasbeen properly evacuated and chargedwith refrigerant. Using a set ofrefrigerant gauges, measure thedischarge and suction pressures. Thedischarge pressure should increaseand the suction pressure shoulddecrease. The current draw shouldappear to be normal.

If the compressor is incorrectlyelectrically phased, the discharge andsuction pressure will be about equal,the current draw will be low(approximately 1/2 the expected value)and the compressor will be noisy. Tocorrect an incorrectly phasedcompressor motor, switch two of thethree electrical connections and startthe compressor again and again checkthe refrigerant pressures and currentdraw.

Maximum Trip CurrentThis is the current at which the currentovercurrent protection device musttake the compressor off-line. TheMaximum Trip Current is determinedat the minimum voltage within thevoltage utilization range. MaximumTrip Current is listed in Table 6.

Locked Rotor AmpsThe Locked Rotor Amp (LRA) rating isused to select electrical devices such asfuses, contactors and circuit breakersfor compressor protection. Consult ULand NEC unit requirements for theproper selection of these components.Locked Rotor Amps are listed inTable 6.

Maximum Rated Load AmpsMaximum Rated Load Amps for thecompressor is defined as MaximumTrip Current/1.40. This definition isbased on the NEC requirement that theMaximum Trip Amps can not exceed140 percent of the RLA.

Must Hold Overload SettingThe Must Hold Overload Setting is125 percent of the Maximum RatedLoad Amps. The overload setting isdependent on the type of overloadused. In this case, it is the specificsetting for Furnas Class 958 Overloadused with the Trane scroll compressor.

Compressor Starter TypeThe scroll compressor is suitable foracross-the-line start only. Table 7 liststhe recommended contactor bycompressor size and voltage.

Determining Current Draw at OtherThan 460 VoltsThe current draw for the 460 voltapplication is listed in the performancecurves. To determine the current drawfor other voltages, multiply the 460 voltcurrent draw by the appropriate factorslisted in Table 7. Use the correctedcurrent draw values to size fuses, wiresand electrical components.

Table 8 — Current Adjustment FactorsNominal Adjustment FactorMotor Voltage at Nominal Volts200/60/3 2.3208/230/60 See Figure 18a and b460/60/400/50@ 380/50 1.01@ 415/50 0.80@ 400/50 0.96@ 460/60 1.00

575/60/3 0.80380/60/3 1.21220/50/3 1.74346/50/3 1.11

21

Figure 18a — 208/230 Volt Current Draw Correction Factors — 10 Ton 208/230 Volt Adjustment Factor

ElectricalData

Figure 18b — 208/230 Volt Current Draw Correction Factors — 15 Ton 208/230 Volt Adjustment Factor

22

ManifoldedCompressorSets

GeneralThe manifolding of compressorsallows the use of scroll compressors inlarger scroll compressor sets in the 18to 60-ton range. Manifolding ofcompressors also allows for the use ofcapacity control. The guidelines forapplying the compressors in amanifolded set are the same as thosefor individual compressors except ascovered in the following sections. SeeTable 9 for available compressorcombinations.

A manifolded compressor set consistsof the compressors listed in Table 9plus a manifold kit which containsmounting rails, stabilizer bar(s) to tiethe compressors together (twocompressor sets only), discharge line,oil equalizer lines and a suction linethat incorporates the exclusive passiveoil return system, mounting spacersand necessary hardware to assemblethe compressors into a manifoldedcompressor set.

The components necessary tomanifold the compressors (listed inTable 10) ship as a kit for installationand assembly by the customer. Table10 lists the ordering numbers for themanifold kits.

Table 9 — Manifold Set Configurations and Connection SizesSuction Discharge

Size CSHA 093 CSHA 100 CSHA 140 CSHA150 Conn. (in) Conn. (in) Figure*180 2 1 5/8 1 1/8 19190 1 1 1 5/8 1 1/8 19200 2 1 5/8 1 1/8 19230 1 1 2 1/8 1 3/8 20240 1 1 2 1/8 1 3/8 20250 1 1 2 1/8 1 3/8 20280 2 2 1/8 1 3/8 21300 2 2 1/8 1 3/8 21320 2 1 2 1/8 1 5/8 22350 2 1 2 1/8 1 5/8 22400 1 2 2 5/8 1 5/8 23450 3 2 5/8 1 5/8 24500 2 2 2 5/8 2 1/8 25600 4 3 1/8 2 1/8 26

*Refer to data sheets for dimensions and weights.

Table 10 — Manifold Kit Ordering NumbersOrdering Table

Size Number Number180, 190 and 200 5710-0047-01 Table 11230, 240 and 250 5710-0048-01 Table 12280 and 300 5710-0049-01 Table 13320, and 350 5710-0109-01 Table 14400 5710-0110-01 Table 15450 5710-0111-01 Table 16500 5710-0112-01 Table 17600 5710-0113-01 Table 18

23


Figure 19 — 18-20 Ton Manifold Set

Table 11 — 5710-0047-01-00 — CSHA180, 190 and 200Item # Description Part Number QTY** Discharge Manifold Assembly By Description 1** Suction Manifold Assembly By Description 11 Mounting Rails 5707-0908-01-00 22 Spacers - Compressor Mounting X04010503-02-00 83 Screw .31-18 x 1.50 - Compressor Mounting X25030007-01-0 84 Washer .31 ID x 1.50 OD - Compressor Mounting X22016000-00-0 85 Oil Equalizer Line Bracket 4356-9483-01-00 26 Oil Equalizer Line Clamp X32030401-08-0 27 Screw 6-32 x .38 Equalizer Clamp X25530033-10-0 28 Oil Equalizer Line X02080628-01-0 140 Lock Washer - Compressor Mounting X22040400-00 862 Top Plate 5707-2700-01-00 166 Nut Top Plate - Hex Lock .31-18 X28020400-00-0 467 Bolt - Top Plate .31-18 x .62 X25040251-10-0 473 Shipping Brace 5707-0772-01-00 274 Screw - Shipping Brace X25110002-00-00 6**indicates items that are provided as an assembly and are not called out for specifically on the drawing included with

the kits.

Oil Charge Valve.25 Flare

SightGlass

24



SightGlass


Typical

Table 12 — 5710-0048-01-00 — CSHA230, 240 and 250Item # Description Part Number QTY** Discharge Manifold Assembly By Description 1** Suction Manifold Assembly By Description 11 Mounting Rails 5707-0908-01-00 22 Spacers - Compressor Mounting X04010503-02-00 83 Screw .31-18 x 1.50 - Compressor Mounting X25030007-01-0 84 Washer .31 ID x 1.50 OD - Compressor Mounting X22016000-00-0 85 Oil Equalizer Line Bracket 4356-9483-01-00 26 Oil Equalizer Line Clamp X32030401-08-0 27 Screw 6-32 x .38 Equalizer Clamp X25530033-10-0 28 Oil Equalizer Line X02080628-01-0 140 Lock Washer - Compressor Mounting X22040400-00 868 Top Plate 5707-2750-01-00 166 Nut Top Plate - Hex Lock .31-18 X28020400-00-0 467 Bolt - Top Plate .31-18 x .62 x25040251-10-0 473 Shipping Brace 5707-0772-01-00 274 Screw - Shipping Brace X25110002-00-00 6**indicates items that are provided as an assembly and are not called out for specifically on the drawing included with

the kits.

25



SightGlass


Table 13 — 5710-0049-01-00 — CSHA280 and 300Item # Description Part Number QTY** Discharge Manifold Assembly By Description 1** Suction Manifold Assembly By Description 11 Mounting Rails 5707-0908-01-00 22 Spacers - Compressor Mounting X04010503-02-00 83 Screw .31-18 x 1.50 - Compressor Mounting X25030007-01-0 84 Washer .31 ID x 1.50 OD - Compressor Mounting X22016000-00-0 85 Oil Equalizer Line Bracket 4356-9483-01-00 26 Oil Equalizer Line Clamp X32030401-08-0 27 Screw 6-32 x .38 Equalizer Clamp X25530033-10-0 28 Oil Equalizer Line X02080629-01-0 140 Lock Washer - Compressor Mounting X22040400-00 862 Top Plate 5707-2767-01-00 166 Nut Top Plate - Hex Lock .31-18 X28020400-00-0 467 Bolt - Top Plate .31-18 x .62 X25040251-10-0 473 Shipping Brace 5707-0772-01-00 274 Screw - Shipping Brace X25110002-00-00 6**indicates items that are provided as an assembly and are not called out for specifically on the drawing included with

the kits.

26

SightGlass


SightGlass


Table 14 — 5710-0109-01-00 — CSHA320 and 350Item # Description Part Number QTY** Discharge Manifold Assembly By Description 1** Suction Manifold Assembly By Description 136 Mounting Rails By Description 237 Spacers- Compressor Mounting X04010503-02-00 1239 Screw .31-18 x 1.50 -Compressor Mounting X25030007-01-0 1240 Washer .31 ID x 1.50 OD-Compressor Mounting X22016000-00-0 1241 Lock Washer- Compressor Mounting X22040400-00 126 Oil Equalizer Line Bracket 4356-9483-01-00 322 Oil Equalizer Line Clamp X32030401-08-0 323 Screw 6-32 x .38 Equalizer Clamp X25530033-10-0 37 Oil Equalizer Line Compressor (9/10 to 9/10) X020800622-01-0 18 Oil Equalizer Line Compressor (9/10 to 14/15) X02080629-01-0 124 Oil Equalizer Line Sight Glass Adapter (middle compressor) X17310606-01-0 125 Schraeder Valve Core - Discharge line fitting X17550004-00-0 126 Schraeder Valve Cap - Discharge line fitting X150900054-00-0 180 Compressor Shipping Shim (2 per location) 4356-9590-01-00 881 Screw Shipping Shim .38-16 x 2.00 X25014900-00-0 476 Washer Shipping Shim .44 ID x 1.75 OD X22010002-00-0 4**indicates items that are provided as an assembly and are not called out for specifically on the drawing included with

the kits.

27


Figure 23 — 40-Ton Manifold Set

SightGlass

SightGlass

Typical

Table 15 — 5710-0110-01-00 — CSHA400Item # Description Part Number QTY** Discharge Manifold Assembly By Description 1** Suction Manifold Assembly By Description 136 Mounting Rails By Description 237 Spacers - Compressor Mounting X04010503-02-00 1239 Screw .31-18 x 1.50 - Compressor Mounting X25030007-01-0 1240 Washer .31 ID x 1.50 OD - Compressor Mounting X22016000-00-0 1241 Lock Washer - Compressor Mounting X22040400-00 126 Oil Equalizer Line Bracket 4356-9483-01-00 322 Oil Equalizer Line Clamp X32030401-08-0 323 Screw 6-32 x .38 Equalizer Clamp X25530033-10-0 37 Oil Equalizer Line Compressor (9/10 to 14/15) X020800608-01-0 18 Oil Equalizer Line Compressor (14/15 to 14/15) X02080609-01-0 124 Oil Equalizer Line Sight Glass Adapter (middle compressor) X17310606-01-0 132 Schraeder Valve Core - Discharge line fitting X17550004-00-0 133 Schraeder Valve Cap - Discharge line fitting X150900054-00-0 180 Compressor Shipping Shim (2 per location) 4356-9590-01-00 881 Screw Shipping Shim .38-16 x 2.00 X25014900-00-0 476 Washer Shipping Shim .44 ID x 1.75 OD X22010002-00-0 4**indicates items that are provided as an assembly and are not called out for specifically on the drawing included with

the kits.

28


SightGlass

SightGlass


Table 16 — 5710-0110-01-00 — CSHA450Item # Description Part Number QTY** Discharge Manifold Assembly By Description 1** Suction Manifold Assembly By Description 136 Mounting Rails By Description 237 Spacers - Compressor Mounting X04010503-02-00 1239 Screw .31-18 x 1.50 - Compressor Mounting X25030007-01-0 1240 Washer .31 ID x 1.50 OD - Compressor Mounting X22016000-00-0 1241 Lock Washer - Compressor Mounting X22040400-00 126 Oil Equalizer Line Bracket 4356-9483-01-00 322 Oil Equalizer Line Clamp X32030401-08-0 323 Screw 6-32 x .38 Equalizer Clamp X25530033-10-0 37 Oil Equalizer Line Compressor (14/15 to 14/15) X020800606-01-0 1

middle to left8 Oil Equalizer Line Compressor (14/15 to 14/15) X02080609-01-0 1

middle to right24 Oil Equalizer Line Sight Glass Adapter (middle compressor) X17310606-01-0 132 Schraeder Valve Core - Discharge line fitting X17550004-00-0 133 Schraeder Valve Cap - Discharge line fitting X150900054-00-0 180 Compressor Shipping Shim (2 per location) 4356-9590-01-00 881 Screw Shipping Shim .38-16 x 2.00 X25014900-00-0 476 Washer Shipping Shim .44 ID x 1.75 OD X22010002-00-0 4**indicates items that are provided as an assembly and are not called out for specifically on the drawing included with

the kits.

29



SightGlass

SightGlass

Typical

Table 17 — 5710-0112-01-00 — CSHA500Item # Description Part Number QTY** Discharge Manifold Assembly By Description 1** Suction Manifold Assembly By Description 143 Mounting Rails By Description 244 Spacers - Compressor Mounting X04010503-02-00 1646 Screw .31-18 x 1.50 - Compressor Mounting X25030007-01-0 1647 Washer .31 ID x 1.50 OD - Compressor Mounting X22016000-00-0 1648 Lock Washer - Compressor Mounting X22040400-00 164 Oil Equalizer Line Bracket 4356-9483-01-00 428 Oil Equalizer Line Clamp X32030401-08-0 429 Screw 6-32 x .38 Equalizer Clamp X25530033-10-0 45 Oil Equalizer Line Compressor (14/15 to 14/15) X02080606-01-0 16 Oil Equalizer Line Compressor (9/10 to 14/15) X020800623-01-0 17 Oil Equalizer Line Compressor (9/10 to 9/10) X020800630-01-0 138 Oil Equalizer Line Sight Glass Adapter X17310606-01-0 2

(middle compressors 1-14/15 and 1-9/10)37 Schraeder Valve Core - Discharge line fitting X17550004-00-0 152 Schraeder Valve Cap - Discharge line fitting X150900054-00-0 180 Compressor Shipping Shim (2 per location) 4356-9590-01-00 1281 Screw Shipping Shim .38-16 x 2.00 X25014900-00-0 676 Washer Shipping Shim .44 ID x 1.75 OD X22010002-00-0 6**indicates items that are provided as an assembly and are not called out for specifically on the drawing included with

the kits.

30



SightGlass

SightGlass

Table 18 — 5710-0113-01-00 — CSHA600Item # Description Part Number QTY** Discharge Manifold Assembly By Description 1** Suction Manifold Assembly By Description 143 Mounting Rails By Description 244 Spacers - Compressor Mounting X04010503-02-00 1646 Screw .31-18 x 1.50 - Compressor Mounting X25030007-01-0 1647 Washer .31 ID x 1.50 OD - Compressor Mounting X22016000-00-0 1648 Lock Washer - Compressor Mounting X22040400-00 164 Oil Equalizer Line Bracket 4356-9483-01-00 428 Oil Equalizer Line Clamp X32030401-08-0 429 Screw 6-32 x .38 Equalizer Clamp X25530033-10-0 45 Oil Equalizer Line Compressor (14/15 to 14/15) X02080606-01-0 2

used with compressors that use item 387 Oil Equalizer Line Compressor (14/15 to 14/15) X020800609-01-0 138 Oil Equalizer Line Sight Glass Adapter X17310606-01-0 2

(middle compressors 1-14/15 and 1-9/10)32 Schraeder Valve Core - Discharge line fitting X7550004-00-0 153 Schraeder Valve Cap - Discharge line fitting X150900054-00-0 180 Compressor Shipping Shim (2 per location) 4356-9590-01-00 1281 Screw Shipping Shim .38-16 x 2.00 X25014900-00-0 676 Washer Shipping Shim .44 ID x 1.75 OD X22010002-00-0 6**indicates items that are provided as an assembly and are not called out for specifically on the drawing included with

the kits.

31

Manifolded Sets IsolatorsThe mounting isolators for use with themanifolded sets are different from theisolators used for single-compressorapplication. The isolators for themanifolded set consist of an upper anda lower isolator mounted under thecompressor mounting rail, a sleeve anda spacer and washers, and cap screw.There are different isolator kitsdepending on whether there are two,three or four compressors in themanifold kit. Table 19 lists the partnumbers for the isolator kits.

Table 19 — Isolator Kit Manifolded SetsNumber of IsolatorManifolded Compressors Kit Part2 5710-0114-01-003 5710-0114-02-004 5710-0114-03-00

IMPORTANT — USE OFCOMPRESSOR SPACERS WITHVIBRATION ISOLATION KIT.

When using the manifold isolator kit, itis important to use the spacerssupplied with this kit to mount thecompressors to the rails that aresupplied with the manifold kit. Do notuse the spacers that are provided withthe manifold kit. Failure to do so willcause insufficient clearance for theupper washer and mounting hardware.These spacers are only required whenusing the vibration isolator kit.

The isolators are fastened to the unitusing the 3/8-inch cap screw supplied inthe isolator kit. For shipment, shippingrails or spacers are supplied that attachto the compressor mounting rails andthen attached to the unit mountingbase to eliminate excessive movementin shipping. Install the isolators asshown in Figure 27.

Solid Mounting of Manifold SetsIf the requirement is to solid mount themanifold set, use the spacers that shipwith the manifold kit to mount thecompressor to the manifold base rails.See Figure 6 for the spacer that shipswith the manifold kit. The manifoldmounting rails can then be mountedsolidly to the unit base.

Compressor Tilt AngleTrane manifolded compressors havebeen tested with the compressor on alevel base (0 percent tilt angle). Ifmanifolded sets need to operate atother than level conditions, the OEMmanufacturer is responsible forqualifying the compressor manifoldsets for operation. Contact the OEMCompressor Group for test criteria andrequirements.

Compressor Start SequenceDuring the design of the unit,consideration needs to be given onhow to start multiple compressors.Multiple compressors can be eitherstarted simultaneously orincrementally.

Upper Isolator


BraceReq’dForShipping

Capscrew.375-16 x 3.00

Sleeve

Flat Washer(1.75)


UnitBase

LowerIsolator

FlatWasher(1.75)


Capscrew.312-18x 2.50 Lock

Washer


1.20TallSpacer - pn x04010503010

Figure 27 — Isolator Installation Manifolded Sets


32


Starting Compressors SimultaneouslyAlthough compressors can be startedsimultaneously, the obviousdisadvantage is that the inrushamperage is high. If the power supplyis not robust enough, a voltagereduction could occur at start-up,causing problems such as lightsdimming. This would be similar tostarting a large compressor across theline. Another consideration is that thelower the voltage, the higher theinrush, 208/230 and 200 voltcompressors have higher locked rotorvalues than 460 volt compressors,making the potential for low voltageproblems even greater.

Another consideration is the responseof the refrigeration system. When largechanges occur rapidly, it takes thesystem longer to settle out and reachoperating equilibrium. The morecomponents in the system such asthermal expansion valves, the longer ittakes to reach equilibrium.

Incremental Start of CompressorsThis is the preferred manner to startcompressors on a manifold set.Incrementally starting compressorsreduces inrush amperage. This issimilar to starting a large compressorusing part winding start, where only aportion of the winding is initiallyenergized and then after one second orless, the other part of the winding isenergized. The advantage to havingmultiple compressors is that they canbe staged on individually at whatevertime sequence is desired. A timingsequence can be chosen that bothreduces inrush and minimizes systemrefrigerant system fluctuations. Ifinrush is the only concern, a minimumof one second between compressorsstarts is recommended.

Ramping up compressor capacityreduces refrigeration systemfluctuation. When smaller changes aremade over a larger time period, therefrigeration system componentsexperience less radical change andhave a better chance of reachingoperating equilibrium quicker thanstarting all the compressors at once.This improves system operation andcontrol.

The actual staging of a unit can beaccomplished by the following devices:

• An electronic temperature control thathas built-in interstage time delay.

• Preprogrammed unit controllersdesigned for a specific unit application.

• Programmable control modules, whereyou program in the control the logic

• Standard temperature control devicesin combination with mechanical relaylogic.

Compressor Capacity ControlSequencingCapacity control is a benefit of havingmultiple compressors manifoldedtogether on a compressor refrigerantcircuit. When using this capability,some guidelines regarding thesequencing of the compressors mustbe followed to assure that the oil returnsystem designed as part of themanifold piping works properly. Theguidelines are as follows:

Dual Compressor Manifold SetsEither compressor can be lead or lag ondual compressor manifold sets.

33

Three and Four Compressor ManifoldSetsThere is a set sequence that must befollowed to assure proper oil return tothe compressors. The sequence isshown in Figure 28.

Oil LevelsThe oil level can only be evaluatedwhen the all the compressors are shut-off. During operation the oil levels willvary. Generally speaking the oil levelwill be highest in the last compressorin the manifolded set and lowest in thefirst compressor in the manifolded set.The minimum oil level with thecompressors shut-off is at the bottomof the oil sight glass.

Refrigerant PipingThe same guidelines for singlecompressors apply to multiplecompressors. See Figures 10a to 10jfor suggested piping configurations.

For connection sizes, see Table 9.

Material SelectionThe following components arerequired for customer assembly:1Compressors — specify voltage andtonnage. Choose the appropriatecompressors from Table 9 and theappropriate manifold assembly kitsfrom Table 10. A quantity of one isrequired per manifold assembly.2Overloads — a quantity of one percompressor is required. See Table 5 forthe proper overload.3Discharge Temperature Switch (ifrequired) — a quantity of one percompressor. The customer mustprovide the clamp and insulation.See the guidelines under SystemProtection Controls.4System Protection Controls — highpressure switch (quantity of one permanifold set) and low pressure switch.See the guidelines under SystemProtection Controls.


Figure 28 — Operating Sequence — Three and Four Compressor Manifolded Sets

Figure 29 — Oil Level — Manifolded Compressors

Oil Level Lower

During OperationOil Level Higher

DownstreamOil Sight Glass

UpstreamOil Sight Glass

Suction Gas Flow

Normal Oil Level

Minimum Oil Level

Oil Sight Glass

Off

Three Compressor Manifold Set

Suction Gas Flow

Suction Gas FlowFour Compressor Manifold Set

Step 1 - Compressor CStep 2 - Compressor A & BStep 3 - Compressor A, B & C

Step 1 - Compressor AStep 2 - Compressors C & DStep 3 - Compressors B, C & DStep 4 - Compressors A, B, C, D

34

Manifold Kit Assembly Procedure

Dual Compressor Sets1Mount the compressor mounting railsto the unit base, using the vibrationisolators and associated hardware.2Mount the compressors on the rails asdetailed on the scroll manifoldassembly drawing, using the spacers.(Note: When using the vibrationisolation kits, use the spacers providedin the mounting isolator kit), lockwashers, washers and screwsprovided. Place the oil equalizer linesupport brackets under the washers.Note 7 on the drawing identifies theproper placement of the compressorfeet on the base rail. Torque themounting bolts to 20 + 2 ft. lb.3Mount the stabilizer plate to thecompressor with nuts and bolts.Torque the bolts to 12-14 ft. lb.4Loose-fit the suction, discharge and oilequalizer lines to the stubs on thecompressor. Clamp the oil equalizerline to the bracket prior to brazing.5After loose-fitting the refrigerant pipinglines, braze them to industry standards.Recommended braze material isSpecification Number BAg-7 AWS/AMS. Note: Purge with nitrogen toprevent the formation of oxides thatare detrimental to system cleanlinessand reliability.


Contact the OEM Products Group foradditional information if required.

Three and Four Compressor Sets1Mount the compressor mounting railsto the unit base using the vibrationisolators and associated hardware.2On a three-compressor set and on themiddle two compressors of a four-compressor set, it is necessary toremove the oil sight glass(s) andreplace with an adapter for connectingthe oil equalizer line.

• Tilt the compressor back to remove thesight glass.

• Install the oil equalizer tube adapter.See Figure 30.

• Torque the adapter to 45 + 5 ft. lb.• It maybe necessary to drain some oil

out of the compressor so that it doesnot run out of the adapter.3Mount the compressors to the rails asdetailed on the scroll manifoldassembly drawing, using the spacers.Note: When using the vibrationisolation kits, use the spacers providedin the mounting isolator kit, lockwashers, washers and screws. Placethe oil equalizer line support bracketson the washers. Note 7 on the drawingidentifies the proper placement of thecompressor feet on the base rail.Torque mounting bolts to 20 + 2 ft. lb.

35


Figure 30 — Oil Equalizer Adapter - Three and Four Compressor Manifolded Set

4Loose-fit the suction, discharge and oilequalizer lines to the stubs on thecompressor. Clamp the oil equalizerline to the bracket prior to brazing.5After loose-fitting the refrigerant pipinglines, braze to industry standards.Recommended braze material isSpecification Number BAg-7 AWS/AMS.6It is recommended to use a wet rag onthe oil equalizer adapter when brazingthe oil tube to the adapter to preventdamage to the “O” ring.7Purge with nitrogen to prevent theformation of oxides that aredetrimental to system cleanliness andreliability.

The discharge line assembly containstwo access ports. One is for connectionof the high pressure control and theother is for use with a Schraeder valveto allow access to the high side forchecking discharge pressures. Onlyone Schraeder valve core is provided.If one of the discharge ports is notused for the high pressure control,install a Schraeder valve core into thefitting.

Alternate Manifolded CompressorConfigurationsIf the standard compressorconfiguration for manifoldedcompressors does not fit your needs,please contact the OEM ProductsGroup for recommendations onalternative configurations. The usermust supply the piping, mounting railsand other hardware for thesealternative configurations. Alternativeconfigurations must be approved bythe Trane OEM Products Group.

36

System cleanliness is one of the mostimportant factors that affect systemand compressor reliability. Systemcontamination can cause bothmechanical and electrical failures.There are several sources of systemcontamination. Some of these are asfollows:1Copper oxides formed whenrefrigerant piping is not purged withnitrogen.2Refrigerant piping chips, burrs andbrazing flux.3Processing residue and metal chipsfrom the evaporators and condensers.4Metal chips and wire brush strandsfrom processing of other systemcomponents.5Contamination in refrigeration tubingwhich is left uncapped duringassembly.6Moisture and air.7Processing chemical and oil used tomanufacture and clean other systemcomponents such as copper tubing,evaporator and condensers.

In addition, field-erected systems aresubject to all the dirt and systemscontamination of the typical jobsite.It is highly recommended that suctionline filter driers as well as a liquid linefilter drier be installed to protectsystems that are field-erected and forother units that are prone tocontamination.

SystemCleanliness

37

For a refrigeration system to workproperly, it must be free of air andmoisture. The process by which air andmoisture are removed is known as“Evacuation and Dehydration.”Moisture and air are harmful to thesystem because they increase thecondensing temperature, raise thedischarge gas temperature, causeoil and refrigerant breakdown andcause the formation of acids.

EvacuationandDehydration

Figure 31 — Evacuation Dehydration Chart

Acids are corrosive to the componentsin the refrigerant system, including thepiping, refrigerant specialties and thecompressor mechanical and electricalcomponents. The elevatedtemperatures can also cause copperplating that can cause mechanicalfailure of the compressor.

The recommended method for“Evacuation and Dehydration” is toevacuate both the high side and lowside to 500 microns or less. To establishthat the unit is leak-free, use a standingvacuum test. The maximum allowablerise over a 15-minute period is 200microns. If the rise exceeds this, eitherthere is still moisture in the system or aleak is present. See Figure 31.

38

Index

Figures Page No.

Figure 1 — How the Scroll Works ........................................................................ 2

Figure 2 — Oil Level Single Compressor ............................................................. 5

Figure 3 — Oil Level Manifold Compressors ....................................................... 6

Figure 4 — Isolator Installation Single Compressor ............................................. 7

Figure 5 — Isolator Installation Manifold Sets ..................................................... 7

Figure 6 — Spacer Solid Mount .......................................................................... 8

Figure 7 — Rotalock Valves ................................................................................. 9

Figure 8 — Compressor Terminal Box Layout ................................................... 10

Figure 9 — Compressor Operating Envelope .................................................... 11

Figure 10 — Recommended Piping Configurations ............................................ 12

Figure 11 — Suggested Wiring Diagram Single Compressor ............................. 14

Figure 12 — Suggested Wiring Diagram Manifold Compressors ........................ 15

Figure 13 — Overcurrent Protection Trip Timing Requirements .......................... 16

Figure 14 — Current Overload ............................................................................ 17

Figure 15 — Example Requirement for Discharge Temperature Switch .............. 18

Figure 16 — Discharge Temperature Switch ....................................................... 19

Figure 17 — Discharge Temperature Switch Installation ..................................... 19

Figure 18 — 208/230 Volt Current Draw Correction Factors ................................. 21

Figure 19 — 18 Through 20-Ton Manifold Set ..................................................... 23

Figure 20 — 23 to 25-Ton Manifold Set ............................................................... 24



Figure 23 — 40-Ton Manifold Set ........................................................................ 27




Figure 27 — Isolator Installation Manifold Sets ................................................... 31

Figure 28 — Operating Sequence 3 and 4 Compressor Manifold Sets ................ 33

Figure 29 — Oil Level Manifold Compressors ..................................................... 33

Figure 30 — Oil Equalizer Line Adapter ............................................................... 35

Figure 31 — Evacuation and Dehydration Chart ................................................. 37

39

Index

Tables Page No.

Table 1 — General Data ....................................................................................... 6

Table 2 — Isolator Kits Manifold Sets .................................................................. 7

Table 3 — Rotalock Connection Sizes .................................................................. 9

Table 4 — Voltage Utilization Range .................................................................. 11

Table 5 — Refrigerant Charge Limit ................................................................... 11

Table 6 — Compressor Electrical Data ............................................................... 18

Table 7 — Contactor Selection .......................................................................... 20

Table 8 — Current Adjustment Factors .............................................................. 20

Table 9 — Manifold Set Configurations and Connection Sizes .......................... 22

Table 10 — Manifold Kit Ordering Numbers ....................................................... 22

Table 11 — Manifold Kit Components CSHA 180 and 200................................... 23

Table 12 — Manifold Kit Components CSHA 230,240 and 250 ............................ 24

Table 13 — Manifold Kit Components CSHA 280 and 300................................... 25

Table 14 — Manifold Kit Components CSHA 320 ................................................ 26





Table 19 — Isolator Kits Manifold Compressors .................................................. 31

40

Library Product Literature

Product Section Refrigeration

Product Compressors

Model 000

Literature Type Data Catalog

Sequence 17

Date August 2003

File No. PL-RF-COM-000-D-17-897

Supersedes COM-D-17Ordering No. COM-D-17-A

The Trane CompanyNorth American Commercial Group3600 Pammel Creek RoadLa Crosse, WI 54601-7599http://www.trane.com

An American Standard Company

Since The Trane Company has a policy of continuousproduct improvement, it reserves the right to changedesign and specification without notice.

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