77312009-trane-raup-600

MUL-SVN05A-E4

InstallationOperationMaintenance

Air Cooled Split System, 20-55 TonCondensing Units Cooling Only, 50 HzRAUP 250, RAUP 300,RAUP 400, RAUP 500, RAUP 600

To be used with themanual of unit controller, UC2C/UC4C

Reference SS-SVX05B-E4

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(i)

Foreword

These installation, operation and

maintenance instructions are given as

a guide to good practice in the

installation, putting into service,

operation and periodic maintenance by

the Trane Product user. They do not

contain full service procedures

necessary for the continued

successful operation of this

equipment. The services of a qualified

service technician should be employed

through the medium of a maintenance

contract with a reputable service

company.

Warranty

Warranty is based on the general terms

and conditions of The Trane Company.

The warranty is void if the equipment

is repaired or modified without the

written approval of Trane, if the

operating limits are exceeded or if the

control system of the electrical wiring

is modified. Damage due to misuse,

lack of maintenance or failure to comply

with the manufacturer’s instructions or

recommendations is not covered by the

warranty obligation.

Receiving / Handling

On arrival, inspect the unit before

signing the delivery note. Specify any

damage on the delivery note, and send

a registered letter of protest to the last

carrier of the goods within 72 hours of

delivery. Notify the local Trane Sales

Office at the same time. The unit

should be totally inspected within 15

days of delivery.

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If any concealed damage is

discovered, stop unpacking the

shipment. Take photos of the

damaged material if possible. Notify

the Carrier immediately by phone and

registered mail. Notify the local Trane

Sales office. Concealed damage must

be reported within 15 days of delivery.

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(ii)

Contents

General InformationForewordWarrantyReceiving / Handling

Contents

Nomenclature

General Data 20-55 Ton Condensing Unit

InstallationGeneral InformationUnit NameplateMachine Room Installation RequirementsVibration Isolators (option)Electrical ConnectionsUnit Start-up

Operation / MaintenanceUnit OperationSeasonal start-up procedure

MaintenanceMaintenanceWeekly MaintenanceMaintenance Inspections

CompressorMotor Winding ThermostatCompressor Manifold PipingTrouble Analysis

Dimensional DataDimensional Data Condensing Unit

Wiring DiagramsStandard Ambient: DOL/SOFT Starter with UC2c/UC4c

controls.High Ambient: DOL Starter with UC2c/UC4c

controls + CrankCaseHeaterLow Ambient: DOL Started with UC2c/UC4c +

Head Pressure ControlsLow Ambient: DOL Started with Trace-EX2 +

Head Pressure Controls

Installation Checklist

Commissioning Log Sheet

Piping Example

(i)

(ii)

1

2

3

7

8

9

13

15

23

24

25

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1

DIGIT 1,2,3

DIGIT 4

DIGIT 5,6,7

DIGIT 8

DIGIT 9

DIGIT 10

DIGIT 11

DIGIT 12

DIGIT 13

DIGIT 14

DIGIT 15

Remote Condensing Unit / Air-Cooled / Up-flow

Development Sequence

Nominal Cooling Capacity, MBH250 = 250 400 = 400 600 = 600300 = 300 500 = 500

Electrical Rating / Utilization RangeD = 380-415V / 3 Phase / 50Hz

Factory Mounted Control1 = DOL Starter with Unitary Controller, UC-2C / UC-4C.2 = Soft Starter (for Compressor Only) with UC-2C / UC-4C.3 = DOL Starter with EX2 (Only available with Low Ambient Kit)

Minor Design SequenceC = Modular RAUP design.

Factory Installed OptionsX = None1 = Corrosion Resistant Fin

Refrigerant TypeA = R22B = R407C

Operating AmbientS = Standard Ambient OptionH = High Ambient OptionL = Low Ambient Option

Future Use

Service Indicator

R A U P 2 5 0 D 1 C X A S 0 A1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

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RAUP 250

73.9/25370.2/240100-50

25.2400/3/50

87

2

2x13T

5020.5/135

65W - 240V

2 1/8”7/8”

18601782

13.32+3144

2

2

191110022264583603

1

12.0

59-109 F15-43 C

Performances (1)Gross Cooling Capacity [R22] (1)Gross Cooling Capacity (R407C)Unit Capacity Steps (%)Total Compressor Power Input (1)Main Power SupplyUtilization RangeSound Power Level

CompressorNumberTypeModelSpeeds NumberMotors NumberUnit MCA Amps (4)RLA(ARI) / LRA (2)(6)Motor RPMSump Heater (Optional) per compressor

Liquid and Suction connectionSuction ConnectionLiquid Connection

CoilTypeTube SizeTube TypeHeightLenghtQuantityFace AreaRowsFins Per Foot (fpf)

FanType / Drive TypeNumberDiameterDrive TypeSpeeds NumberMotors QuantityMotors kW (2)FLA/LRA (2)Motor RPM

DimensionsHeightWidthLengthWeight UncratedWeight Crated

System DataRefrigerant Circuit

Refrigerant Charge (3)Approximate per circuitRAUP Only

Minimum Outdoor Air Temperature for Mechanical CoolingStandard Ambient Operating Range [5]

(kW)/(MBH)(kW)/(MBH)

(kW)

(dB(A)

(A)(A)(rpm)(W)

brazedbrazed

(mm)

(mm)(mm)

(m2)

(mm)/(in)

kw/hp(A)(rpm)

(mm)(mm)(mm)(kg)(kg)

(kg)

(F)(C)

Notes[1]

[2][3]

At 7deg C SST and 35 deg C Ambient,400V, Subcooling 8.3K, Superheat11.1KPer Motor @ 400VPer Circuit

[4] Minimum Circuit Ampacity (MCA) is 125%of the largest compressor RLA plus 100%of the other compressor RLA plus the sumof the condenser fan FLA.High Ambient and Low Ambient OptionsAvailable.

[5] RLA (ARI) = Rated Load Amp at ARI Rat-ing Point, (7.2°C Evap / 54.4°C Condens-ing).

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Table 1 - General Data 020-55 Ton Condensing UnitRAUP 600

180.5/617171.5/589

100-75-50-2553.6

400/3/50

92

4

2x (15T+15T)

10924.0/175

75W - 240V

2 1/8”x27/8”x2

18601782

26.63

144

4

4

19111992226411771212

2

15.0

59-109 F15-43 C

RAUP 300

90.3/30885.8/293100-50

26.8400/3/50

89

2

2 x 15T

5824.0/175

75W - 240V

2 1/8”7/8”

18601782

13.33

144

2

2

191110022264593613

1

15.0

59-109 F15-43 C

RAUP 500

147.9/505140.5/480

100-75-50-2550.4

400/3/50

90

4

2 x (13T+13T)

9420.5/135

65W - 240V

2 1/8”x27/8”x2

18601782

26.62+3144

4

4

19111992226411531188

2

12.0

59-109 F15-43 C

RAUP 400

113.9/389108.2/370

100-75-50-2536.2

400/3/50400V +.-10%

89

4Scroll

2x (10T+10T)11

7616.5/130

290065W - 240V

1 5/8”x27/8”x2

Plate Fin9.52

Smooth18601782

26.62

144

Propeller3

711/28Direct

13

0.55/0.751.8/5.7

900

191119922264990

1025

2

10.0

59-109 F15-43 C

(2)

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Machine room installationrequirements

FoundationA special base or foundation is not

required when the floor is level and of

sufficient strength to support the units

weight.

Lifting of the unitFour lifting lugs are provided at the base

of each unit for crane lift. Attach cable

slings to each lug ( refer to Figure1)

and install a spreader bar between the

cable to protect the unit. Make sure that

the lifting equipment is capable of

handling the weight of the unit.

ClearancesProvide sufficient clearance around the

unit for performance of service and

maintenance. Caution unit operation is

a function of the air temperature. Any

recycling of the air fed out by he fans

will increase the air intake temperature

over the condense fins and result in a

high temperature out. Make sure

nothing prevents air flow to run through

the unit coils. Refer to dimensional

drawing recommended for detailed

clearances, under Dimensional Data

section.

Special lifting and movinginstruction

A specific lifting method isrecommended as follows:1. Four lifting points are built into the

unit.2. Slings and spreader bar to be

provided by rigger and attached to

the four lifting points.

3. Minimun rated lifting capacity

(vertical) of each sling and

spreader bar shall be no less than

the tabulated unit shipping weight.

4. Caution: The unit must be lifting with

the utmost care Avoid shock load by

lifting slowly and evenly.

Figure 1

Lifting of the unit

Vibration Isolators (option)

Vibration isolators (rubber pads) are

recommended and are to be placed

under the unit feet.

General Information

This manual cover the installation of the

RAUP 250 & RAUP 300(single circuit),

and RAUP 400, RAUP 500 & RAUP

600(dual circuits) air cooled condensing

units. Installation procedures should be

performed in the sequence that they

appear in this manual. Do not destroy

or remove the manual from the unit. The

manual should remain weather-

protected with the unit until all

installation procedures are complete.

Note: It is not the intention of this

manual to cover all possible variations

in the systems that may occur or to

provide comprehensive information

concerning every possible contingency

that may be encountered during an

installation. If additional information is

required or if specific problem arise that

are not fully discussed in this manual,

contact your local sales office.

Note: "Warnings" and "Cautions"

appear at appropriate places in this

manual. Your personal safety and the

proper operation of this machine require

that you follow them carefully. The

Company assumes on liability for

installations or servicing performed by

unqualified personnel.

Unit nameplate

The unit nameplate gives the full model

reference. The power supply of unit is

specified and must not vary by more

that 5% of the specified voltage.

(3)

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Pressure and leak testingWhen pressure and leak testing, thesesafety precautions must be adheredto:1. Do not work in closed area where

refrigerant may be leaking - asufficient quantity of vapors may bepresent to cause personal injury.Provide adequate ventilation.

2. Do not use oxygen or ecetylene inplace of regrigerant and dry nitrogenfor leak testing- a violent explosionmay result.

3. Always use a pressure regulator,valves and gauges to control drumand line pressures when pressuretesting the system. Excessivepressures may cause line ruptures,equipment damage or an explosionresulting in personal injury.

Pressure test the liquid line, andsuction line at pressures dictated bylocal codes.

Charge enough refrigerant into thesystem to raise the pressure to 1 bar.Using oil-pumped dry nitrogen, buildthe system pressure to 7 bar.Check the piping and the evaporatorunit for leaks with a leak detector. Bevery thorough in this test, checkingevery possible point of leakage. Ifleaks are found during the testing,release the test pressure, break theconnection and make a new joint.Retest to make sure the connection issolid.

Field evacuationFor field evacuation, use a rotary-stylevacuum pump. Determine the pumpsize required for proper unit evacuation.When hooking a vacuum pump to arefrigeration system, it is important toconnect the pump to both the high andlow side of the system.

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Follow the pump manufacturer'sdirections as to the proper methods ofusing the vacuum pump. The linesused to connect the pump to the systemshould be copper and of the largestdiameter that can pratically be used.Using larger line sizes with minimumflow resistance can significantly reduceevacuation time. Rubber or synthetichoses are not acceptable for unitevacuation because they havemoisture absorbing characteristicswhich result in excessive rates ofoutgassing and pressure rise duringstanding vacuum test. This makes itimpossible to determine if the unit hasa leak.A vacuum gauge should be installedin the common line ahead of thevacuum pump shutoff valve as shownin Figure 2. Close Valve B and openValve A. After several minutes, thegauge reading will indicate theminimum blank-off pressure the pumpis capable of pulling. Rotary pumpshould produce vacuum of less than100 microns.Open Valve B and evacuate the systemto a pressure of 500 microns or less.Valve A must be closed when takingthis reading. Once 500 microns or lessis obtained, with Valve A closed, a timeversus pressure rise over a 15 minuteperiod is 200 microns. If pressure riseis greater than 200 microns but levelsoff to a contant value, excessivemoisture is present. If the pressuresteadily continues to rise, a leak isindicated.

Figure 2Vacuum pump connection.

Caution: Do not exceed the highpressure control setting plus 0.7bar. Test pressures on liquid lineand on suction line must complywith local and national codes.

Refrigerant circuitOne circuit on sizes 250 and 300, andtwo circuits on sizes 400, 500 and 600.Single circuit units will have twocompressors manifolded. Both circuitsof the four compressor units aremanifolded. Refrigerant connectionsnot connected are sealed and plugged.

Refrigerant pipeconnectionsDetermination of the size of the pipeconnections.

Liquid lineSize the liquid line on the basis of:1. Full load operating conditions.2. A pressure drop of 100 kPa

maximum.3. A liquid velocity not exceeding 3 m/s

(to avoid hammer).

Suction lineDesign the suction line to providesufficient gas velocity in both horizontaland vertical runs to carry thecompressor oil and ensure a uniformrate of return to the compressor. Sizethe compressor. Size the hot gas lineon the basis of:1. Producing gas velocity in horizontal

runs at least 2.5 m/s at minimumoperating conditions.

2. Producing gas velocity in verticalrisers at least 5 m/s at minimumoperating conditions.

3. Gas velocity should not exceed 20m/s under maximum loadconditions.

4. Maximum pressure drop in suctionline should not exceed 20 kPa.

Pitch the horizontal run of suction linetoward the evaporator.

Refrigerant line isolationIsolate the refrigerant lines from thebuilding to prevent normal vibration inthe lines from the building structure.Also avoid bypassing the isolationsystem on the unit by attaching therefrigerant piping or electric conduit toorigidly.Any unit vibration can travel along rigidpipes or conduits to the building.

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PreparationBefore putting the system intooperation, perform these service andcheck-out procedures:1.

2.

3.

Wiring diagrams are furnished with theunits, but extra copies may be obtainedfrom the local Trane sales office. Theinstalling contractor is to provide andinstall fused disconnect switches andthe wiring up to the unit control panel.Check all wiring connections and tracethe circuits to make sure that theyagree with the wiring diagrams.

Unit Start-UpPreparation for start-upBefore starting the unit, use thefollowing procedures to ensure that theunit is completely and properlyinstalled and ready for start-up.

The installer must make sure that thefollowing points are checked beforethe initial start-up.1.

2.

3.

4.5.

6.

7.

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Electrical Connections

Inspect all wiring connections.Connections should be clean andtight. Trace circuits to ensure thatwiring agrees with wiring diagramsprovided with the unit. Informationin the title block of the wiringdiagram should match the data thatappears on the unit nameplate.Close the unit power fuseddisconnect switch and the manualdisconnect switch.Check the unit supply voltage toensure that the voltage is within theutilization range.Check the compressor oil level.Check with a phase-meter thedirection of rotation of scroll Tranecompressors or check the goodoperation of the discharge andsuction pressures.As the various motors of the systemare started, check the direction ofrotation and make sure that thedriven equipment is operatingsatisfactorily.Ensure sufficient cooling loadavailable at day of start-up(minimum of 50% of design load).Before making any electrical power

Check the unit supply voltage toensure that the voltage is within theutilization range.

Place all refrigerant circuit valves inoperating position.

As per UL standard,MCA = Minimum Circuit Ampacity,MCA = 1.25 (LARGEST MOTOR AMP (RLA or FLA) + the SUM OF REMAINING MOTOR AMPS.RLA (ARI) = Rated Load Amp at ARI Rating Point, (7.2C Evap / 54.4C Condensing)WHEN, Compressor is Large Load:MAX FUSE SIZE & MCA = (2.25 * LARGEST COMPR. RLA) + SUM OF REMAINING COMPRESSOR RLA + FAN MOTOR FLA.Note: The standard fuse or circuit breaker size selected must be equal to or less than the calculated value.Also, the selected device rating must be greater than the minimum circuit ampacity.

Low Voltage Interconnecting WiringInstall the zone sensor in the room/zone, and connect to the unitary controller (at RAUP) as shown in the unit wiring diagram.Use the recommended cable. The unitary controller can be enabled/disabled via the BIP1. Typically, this input is interfaced withAHU FAN STARTER INTERLOCK (DRY CONTACT)

Caution:1. All wiring should comply with

local and national codes. Typeand location of disconnectswitches should comply withlocal and national codes. Installdisconnect switch near unit,within sight, for safety.

2. Use copper conductors only forinstallation wiring. Unitterminals are not designed toaccept other type of wiring. Theuse of aluminium wire maycause galvanic corrosion and/oroverheating at the connectionpoints with resultant equipmentfailure.

connections make sure that theinsulation resistance of all powerterminal to earth is in accordancewith the international electricalcodes. Measure the insulation ofall electrical motors using a 500 VDC tester and refer to themanufacturer's specifications.

Caution:Phase unbalance must not exceed2%. Supply for all motors is to bewithin plus or minus 5% of thevoltages specified on thecompressor nameplate.

Warning:No motor should be started if theinsulation resistance is less than2 mega ohms. Under nocircumstances should any voltagebe applied to a motor while it isunder vacuum.

RAUP 250RAUP 300RAUP 400RAUP 500RAUP 600

708292115133

Compressors UNITMCAModel Power supply

Fan Motor @ 415V

50587694

109

Max FuseSize & MCBQty.

22344

RLA(ARI)20.524.016.520.524.0

LRA135175130135175

Qty.22444

KW0.550.550.550.550.55

FLA1.81.81.81.81.8

380-415 V / 3Ph/50Hz380-415 V / 3Ph/50Hz380-415 V / 3Ph/50Hz380-415 V / 3Ph/50Hz380-415 V / 3Ph/50Hz

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- liquid line sight glass.- superheat.- subcooling.

All readings and measurement shouldbe logged.Procedures are given below.

Oil levelOil should be visible in the compressor,under full load, in the compressor oillevel sight glass. The unit wascharged with the proper amount of oilbefore shipping. Under normaloperation, compressor oil is alwaysexpected to return to compressor oilsump, and no additional oil should beadded. For oil level indication, refer tocompressor oil sight glass, as perFigure 3. If oil is within sight glassvisibility, oil quantity should besufficient.

Refrigerant pressuresObserve operating pressures. ifpressures are above or below normalsee <<Trouble Analysis>> section.Normal operating pressures are inTable 2. A High & Low pressuresettings are found in Table 1.

Liquid line sight glass(Optional)The flow of refrigerant through the sightglass should be smooth and withoutbubbles. Bubbles indicate a refrigerantshortage and probably a leak, or arestriction in the liquid line.

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4. Reset all controls equipped with amanual reset function.

Refrigerant chargingAfter the refrigeration pipework systemhas been pressure tested andevacuated, and meets the vacuumpressure requirements of paragraph<<Field evacuation>>, the refrigerantmay be charged as follows. Be sureto follow the start-up procedure at thesame as charging the refrigerant.1. Loosely connect a cylinder of

refrigerant to the 1/4" OD ChargingValve Located on the liquid line.

2. Open and close the valve on therefrigerant cylinder to purge theconnection. Tighten the couplingnut.

3. Invert the refrigerant cylinder so thatonly liquid will enter the system.

4. Allow the compressor to continuerunning throughout the remainderof the charging operation. Do notallow the pressure to fall bellow0.15 bar.

5. Allow the system to continuefunctioning for approximately 30minutes. If during this periodbubbles appear in the liquid linesight glass, add refrigerant.

6. Leak-test the refrigerant circuit.

Start-up procedure1. During commisioning start the unitby turning the control circuit switch,(MCB) in the control panel.Make sure the AHU fan is operatingandthe status (via starter’s dry contact) isrequired by BIP 1 (enabled/disabledinput point)2. After the unit has started, allow in to

operate for at least 15 minutes tostabilise operating pressures. Thencheck:

- compressor oil level.- compressor and fan motor power

consumption.- suction pressure.- discharge pressure.

SuperheatNormal Superheat is 6 to 8 deg C.Overfeeding of the evaporator resultsin high suction pressure, lowsuperheat and possible liquidcarryover, Inadequate or too high asuperheat is remedied by adjustingstem on the thermostatic expansionvalve (TEV). If this fails to correct thecondition, then the valve cage or powerelement of the TEV may be defectiveand should be replaced.

Maximumoil level

Minimumoil level

Caution:1. Excessive foaming indicates the

presence of refrigerant in the oiland will result insuffcientcompressor lubrication. Turn offthe motor and investigate thecause.

2. An excess of the oil in thecompressor can causeproblems in the same way as alack of oil. Before topping up,contact a qualified servicetechnician.Use only Trane recommendedoils.

Caution:Do not attempt to start thecompressor by blocking the safetycontrols. Allow the condensing unitto function in a normal manner.

Figure 3 - Compressor oil level

CAUTIONPHASE ROTATION IS CRITICAL

IF SUCTION PRESSURE DOESNOT FALL TO EXPECTEDOPERTATING LEVEL WITHINTHIRTY (30) SECONDS AFTERCOMPRESSOR IS STARTED,COMPRESSOR ROTATION MAY BEREVERSED.

TO REVERSE ROTATION,DISCONNECT ALL UNIT POWERAND REVERSE ANY TWO (2)INCOMING POWER LEAD WIRESAT THE UNIT HIGH VOLTAGETERMINAL BLOCK. RECONNECTALL UNIT POWER, RESTARTUNIT, AND RE-CHECK SUCTIONPRESSURE.

WARNING!1. Do NOT run the compressor on

reverse rotation2. Do NOT perform any pump down

cycle with Scroll compressor3. Do NOT run the compressor

below the the setting of lowpressure switch

4. Do NOT by pass any safetydevices when operating thesystem.

Failure to observe any of the abovewill cause severe damage to theScroll compressors.

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Seasonal start-upprocedure1. Perform the applicable procedures

outline under <<Annual Maintenance>>in the Maintenance Section.

2. Test the entire refrigerant system forleaks.

3. Close the system master disconnectswitch

4. Start the system5. Check the operation of all interlocked

equipment.6.Check oil level and operating

pressures after the system has beenin operation for 15 to 20 minutes.

7. Check discharge pressure against<<Normal operating conditions>>. Ifthe pressure is above or below thenormal level, stop the unit and correctthe cause.

8. On Scrolls, compressor sightglass oillevels may be anywhere within thesightglass. Also 2 scrolls manifoldedtogether will have different levels.

MaintenanceThe folowing maintenance are given asan essential part of the requiredmaintenance of this equipment.However the services of a qualifiedservices technician are required to

perform the periodic maintenanceprocedures as part of a regularmaintenance contact. Perform allmaintenance procedures at thescheduled intervals. This will prolongthe life of the unit and reduce thepossibility of costly equipment failure.Use an <<operator�s log>> to record aweekly <<operator condition history>>for this machine. The operating log forthis unit can be a valuable diagnostictool for service personnel also, theoperator, by noticing trends in theoperating conditions can often foreseeand prevent problem situations beforethey become serious. It may be requiredfor inspection in the event of warrantyclaim.

Weekly maintenance

1. Check the compressor oil level. Theoil should cover 1/2 of the sight glasswhen running at full load. Before oilis added allow the compressor torun continuously for 3-4 hours.Check the oil level every 30 minutes.If the level does not return to cover 1/2 of the sight glass contact a qualifiedservice technician.

2. Trane approved compressor oil:R22-mineral (160p)R407C-POE (160SE)

Table 2 - Normal operating conditionsAmbient

Discharge pressure (bar)Suction pressure (bar)

Figure 3APIPING DETAILS OF REFRIGERANT COILS

2514-17

4-6

3017-19

4-6

4022-25

4-6

TEMPERATURE (C)

Final checkoutRun the unit sequentially through itsstages of cooling.Once proper unit operation isconfirmed, perform these final steps:1. Inspect the unit for debris and/or

misplaced tools and hardware.2. If the unit is operated immediately,

be sure all valves are in operatingposition.

3. Secure all panels including controlpanel in place.

OperationOperating the unitUnit operation unit intialized by turningthe control circuit ON REFERCONTROLLER IOD.

Figure 3B Figure 3C

Note:The lubricating oils recogniesed byTrane have been subjected toextensive testing in laboratoriesand have been found to give therequired satisfactory results for usewith the compressors.The use of any oil not conformingto Trane required standard is at thesole responsibility of the user andcould result in warrantycancellation.

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Table 2AGeneral interconnectiong line sizes

** In shaded region, use 2 1/8 for all horizontal runs, and 1 5/8 for all vertical risers.However, for correct and proper pipe sizing, it is recommended to size piping based on Trane recommendedpiping guide or use computer aided software where applicable

<<operation>>. The visits shouldinclude the following proceduces:- Inspect contacts of motor contactors.- Check setting and function of each

system control.- Perform an oil analysis to determine

the acidity of the compressor oil andrecord the results.

Other procedures may be necessary,depending on the age and usage of theequipment.

A maintenance visit by a qualifiedservice technician is alsorecommended after the first 500 hoursof operation after commissioning.

Caution:1. Excessive foaming indicates the

presence of refrigeration in the oiland will result in insufficientcompressor lubrication. Turn offthe motor and investigate thecause.

2. An excess of oil in the compressorcan cause problems in the sameway as a lack of oil. Beforetopping up, contact a qualifiedservice technician.Use only Trane recommendedoil.

3. The flow of refrigerant through thesight glass should be smooth andwithout bubbles. Bubblesindicate a refrigerant shortageand probably a leak, or arestriction in the liquid line.Contact a qualified servicetechnician. Each sight glass isequipped with a moistureindicator. The colour of theindicator element changes withthe amount of moisture in therefrigerant, but also as a functionof temprerature. It shouldindicate <<dry>> refrigerant if itindicates <<wet>> run the unit fora minimum of 12 hours and checkagain. If it remains consistentlyin <<caution>> or <<wet>>zones, contact a qualified servicetechnician.

4.Run the compressor(s) for aminimum of two (2) hours beforetaking the initial moisture levelreadings after a start-up. Themoisture indicator element ismoisture and temperature

sensitive, so the system must be atnormal operating temperatures toobtain correct moisture levelreadings.

Warning / Caution:The oil analysis procedure must beperformed by a qualified servicetechnician. Incorrect interpretationof analysis results can causedamage to the unit. The use ofimproper analysis procedures cancause hazardous condition thatmay result in injury to servicepersonnel.- Refrigerant leak test.- Check motor winding insulation

(once per year).

3. Observe operating pressures. Ifpressures are above or belownormal, see <<Trouble Analysis>>section. Normal Operating pressuresare in Table 2.

4. Inspect entire system for any unusualconditions such as noisy compressor,loose access panels, leaky pipes ofchattering contactors.

5. Note temperatures, pressures, dateand time as well as any observationin a machine log book.

Annual maintenance

1. Remove corrosion from any surfaceand repaint. Check the condition ofthe gasket around the control paneldoor.

2.Perform all weekly maintenanceprocedures.

Maintenance inspections

If the unit does not perform properlyduring these inspections, consult the<<Trouble Analysis>> section forpossible cause and recommendedprocedures. The following proceduresshould be carried out by a qualifiedservice techinician as part of amaintenance contract.The first and last visit will include theseasonal shut down and start-upprocedures, when applicable asdetailed on the section on

Note:It is important that the equipment isregularly serviced by a qualifiedservice technician, at least once peryear / 1000 hours of operation,minimum frequency. Failure torespect this requirement may resultin cancellation of Trane warrantyand liability.

SUCT

2 1/8___

___

SUCT

2 1/8

2 1/8

___

SUCT

2 1/8

2 1/8

___

SUCT

2 1/8

2 1/8

2 1/8

SUCT

2 1/8

2 1/8

2 1/8

SUCT

2 1/8

2 1/8

2 1/8

SUCT

2 1/82 1/82 1/8

SUCT

1 5/8

2 1/8

2 1/8

LINE SIZE - O.D. (IN.)

LENGTH OF INTERCONNECTING LINES (FT) **

LIQ7/8

1 1/8

___

LIQ7/8

___

___

CONDENSING

UNIT

RAUP 400

RAUP 250, 500

RAUP 300, 600

LIQ5/8

7/8

7/8

SUCT

1 5/8

1 5/8

1 5/8

LIQ7/8

7/8

7/8

SUCT

1 5/81 5/82 5/8

LIQ7/8

7/8

7/8

LIQ7/8

7/8

7/8

LIQ7/8

7/8

1 1/8

LIQ7/8

1 1/8

1 1/8

LIQ7/8

1 1/8

1 1/8

LIQ7/8

1 1/8

___

0-20 21-40 41-60 61-80 81-100 101-120 121-140 141-160 161-180 181-200

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CompressorMotor Winding Thermostat

Each motor winding thermostat is a pilotduty control designed to stopcompressor operation if the motorwindings become hot due to rapidcycling, loss of charge, abnormally lowsuction temperatures, or thecompressor running backwards.

Compressor ManifoldPiping

The compressor refrigerant pipingmanifold system was purposelydesigned to provide proper oil return toboth compressors; therefore, theoriginal refrigerant manifoldingsystem shuold not be modified in anyway!

If a compressor replacement isrequired, do not alter the compressormanifold piping; improper oil return andcompressor failure could result. If asuction filter is required, install it aminimum of 18" upstream of thecompressor manifold piping.See Figure 4

Figure 4 :Location Requirements for SuctionLine Filter Installation after MotorBurnout

Note: 1, 2, 3 and 4 indicate which compressor in the unit is operating. (%)indicates the amount of the circuit in the operation during a given step. Refer todimensional data for the location of the compressors 1, 2, 3 and 4 in the RAUPunit.

Caution: Altering the original manifoldpiping may cause oil compressorfailure.

The scroll compressors in the RAUPunits do not unload. Instead, they arestaged on and off for various steps ofloading. This sequence is critical andmust not be changed! Altering thissequence in any way could causecompresoor failure.

Table 2BCompresoor Sequencing

This sequence is of most importancebecause it maximizes lubrication andensure proper oil return. Secondly, thedesign of the oil return with equalizer iscritical. The lead compressor mustalways be in the lead in the sequence.Should it fail, it locks out the circuitimmediately, saving the othercompresoor.

UnitSize

250300

400500600

ControlStep

12

1234

11, 2

11

1, 21, 2

(50%)(100%)

(50%)(50%)

(100%)(100%)

33

3, 4

--

-(50%)(50%)

(100%)

Circuit 1Comp. #

Circuit 2Comp. #

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Recommended action.

Repair or replace.

Repair or replace.

Call Trane Service.

Check for blown line fuse or brokenleak.Determine why switch was opened.

Check load on motor.

Call power company.

Locate open control and determinecause.See individual control.

Replace Compressor.

See Complaint <<Discharge pressuretoo high.>>

Recommended action

See H.

a) contact power company.b) see discharge pressure too high.

Problems and symptoms

Full voltage at motor terminal but motorwill not run.

Inoperative motor starter.

Open contacts of safety control ofthermal overload.

Electric circuit test shows no currenton line side of motor starter.

Electric circuit test show current on linebut not on motor side or fuse.

Voltmeter does not read proper voltage.

Motor starter holding coil is notenergized.

Compresoor will not operate.

Open contact on high pressure switch.Discharge pressure above cut-insetting.


High pressure control has cut out.

Thermal overload relay has cut out.

Winding thermostat has cut out.

Probable cause

Burned-out motor.

Burned-out holding coil or brokencontacts.

Safety control of thermal overloadrelays has cut outs.

a) Power failure.b) Disconnect switch open.

Fuse down. Replace fuse

Low voltage

Open control circuit.

Frozen compressor due to locked ordamaged mechanism

Discharge pressure above cut-insetting of high pressure cut-out switch

Probable Cause

See H.

a) voltage too lowb)cooling load or condensingtemperature too high

Refrigerant shortage

B. Compressor stops

A. Compressor fails to starts

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Suction pressure too low and frostingat driver.

Motor starts and stops frequently


High temperature in conditionedspace.

Bubbles in sight glass


Oil level too low (sight glass).

Gradual drop of oil level.

Excessively cold suction.Noisy compressor


Abnormally cold suction line:compressor knocks. Valve bulbattachment.

Compressor noisy

Problems and symptoms.

Expansion valve hissed.

High pressure drop across filter-drier.

Superheat too high.

Superheat too high.

Probable cause

Restricted liquid liner driver.

Faulty motor.

Probable cause

Excessively high cooling load

a) Lack of refrigerant.b) Filter driver obstructed

Probable cause

Insufficient oil charge.

Clogged filter drier

Liquid flooding back to compressor

Probable cause

a) Liquid flood-backb)Expansion Valve stuck in open

position.

Incorrect direction of rotation

Probable cause.

Lack of refrigerant.

Clogged filter-driver.

Superheat set too high.

Excessive pressure drop in thethermal expansion valve.

Recommended action

Replace driver core.

Replace compressor.

Recommended action

Check infiltration and insulation ofconditioned space.

a) Repair leak, add refrigerant.b) Replace driver core.

Recommended action

All oil.

Replace.

Readjust superheat setting and verifycorrect bulb mounting.

Recommended action

a) Check superheat and expansion.b) Repair or replace

Inverse the direction of rotation

Recommended action

Add refrigerant.

Clean or replace.

Check superheat and adjustexpansion valve

Check superheat and reset thermalexpansion valve

C. Compressor shortcycles

D. Compressor runs Continuously

E. Compressor loses oil

F. Compressor is noisy

G. System short of capacity

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Recommended action

Clean coil, check fan and motor forproper operation.

Remove air or non condensibles.

Recommended action

Repair leak and charge.

Recommended action

Check system.

a) Adjust superheat and check bulbattachment.

b) Repair or replace.

Recommended action

Repair leak, add refrigerant.

Replace.

Replace valve power element.

Clean or replace.

Check external equaliser of expansionvalve.


Too little or too warm condenser air.

Restricted air flow.

Excessive discharge pressure.


Bubbles in sight glass.


Compressors run continuously.

Abnormally cold suction line; liquidflood-back to compressor.



High pressure drop across filter-driver.

No refrigerant flow through expansionvalve.

Loss of capacity.

Probable cause

Excessively warm air leavingcondenser.Cuts out on high pressure control.

Air or noncondensible gas in system.

Probable cause


Probable cause

Excessive load on evaporator

a) Expansion valve opens too far.b) Expansion valve stuck in open

position.

Probable cause


Clogged filter drier.

Expansion valve power element haslost charge.

Obstructed expansion valve.

Too much pressure drop in evaporator.

H. Discharge pressure too high

J. Discharge pressure too high

K. Discharge pressure too high

L. Discharge pressure too high


Too little or too warm condenser air.

Restricted air flow.

Excessive discharge pressure.




Compressors run continuously.

Abnormally cold suction line; liquidflood-back to compressor.



High pressure drop across filter-driver.

No refrigerant flow through expansionvalve.

Loss of capacity.

This is by no means a completeanalysis of the scroll refrigerationsystem. Instead, its intention is to

familiarize the operator with theoperation of the scroll unit and providethe background necessary for him to

recognize and accurately correct orreport any developing problem.

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RAUP Trane Air Cooled Condensing Unit

This list must checked off by the installer to ensure correct installation before the unit start up.

Unit acceptance

Check for damage, if any, on transportation

Check for equipment shipped against delivery slip

Check lifting system

Unit positioning

Remove packaging

Check position of unit

Check unit is level

Check clearance around condenser

Check clearance required for maintenance access

Check position of rubber pads

Refrigerant circuit

Check filter dryer and sight glass presence

Check oil traps presence on discharge line ( if there vertical risers>3m)

Check pitch for horizontal lines ( 1 cm/m)

Check refrigerant presence

Electrical equipment

Check direction of rotation of compressors and fan motors

Check installation and rating of mains power switch/fuse

Check that electrical connections comply with specification

Check that electrical connections match information on manufacturer' s identification plateCheck electrical connections and connections to mains power switch

GeneralCheck available cooling charge (50% of rated installation load)Check with other handling installation works

Comments:.............................................................................................................................................................................................................

.................................................................................................................................................................................................................................

.................................................................................................................................................................................................................................

.................................................................................................................................................................................................................................

Signature:........................................................... Name: .....................................................................................................................................

Order No: ..............................................................................................................................................................................................................

Work site: ...............................................................................................................................................................................................................

Please return to your Trance Service Agency

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START-UP ENGINEER/TECHNICIAN NAME :PROJECT NAME :DEALER/CONTRACTOR :SALES OFFICE LOCATION :DATE COMMISSIONED :

1. Nameplate informationModel No: Serial No.

Voltage: RLA:

2. Compressor ( S)A. Voltage at Compressor Terminals

Comp. No. 1: T1 T2 T3




Voltage lmbalance: Comp. "1" Comp. "2"

Comp. "3" Comp. "4"

B. Amp Draw





3. Operating ConditionsA. Circuit "A"Discharge Pressure. Suction Pressure.Liquid Line Pressure. Suction Line Temp.Liquid Line Temp. SuperHeat.Subcooling. Evap. Entering Air Temp. (DB/WB)Amblent Temp. Evap. Discharge Air Temp. (DB/WB)

B. Circuit "B"Discharge Pressure. Suction Pressure.Liquid Line Pressure. Suction Line Temp.Liquid Line Temp. SuperHeat.Subcooling. Evap. Entering Air Temp. (DB/WB)Amblent Temp. Evap. Discharge Air Temp. (DB/WB)

4. ControlsA. All Fans Operating [ ] YesProperly? [ ] No Fan lnoperative

5. Refrigerant PipingEvacuation Level System Charge

24

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MUL-SVN05A-E4 (October 2005)

MUL-SVN05A-E4 (September 2002)

Malaysia

Literature Order Number

File Number

Supersedes

Stocking Location

Trane has a policy of continuous product and product data improvement and reserves the right to chargedesign and specifications without notice. Only qualified technicians should perform the installation andservicing of equipment referred to in this publication.

TraneA business of American Standard Companieswww.trane.com

For more information, contact your local district

office

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77312009-trane-raup-600

Documents

2c uc

qualified service technician

entering air temp

producing gas velocity

expansion valve stuck

gross cooling capacity

discharge air temp

compressor manifold piping