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18-AC71D1-5Installer’s GuideCondensing Units4TTR3ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODESIMPORTANT — This Document is customer property and is to remain with this unit. Please return to serviceinformation pack upon completion of work.These instructions do not cover all variations insystems nor provide for every possible contingencyto be met in connection with installation. All phasesof this installation must comply with NATIONAL,STATE AND LOCAL CODES. Should further informationbe desired or should particular problems arise which arenot covered sufficiently for the purchaser’s purposes, thematter should be referred to your installing dealer or local distributor.A. General!!UNIT CONTAINS R-410A REFRIGERANT!R-410A OPERATING PRESSURE EXCEEDS THELIMIT OF R-22. PROPER SERVICE EQUIPMENT ISREQUIRED. FAILURE TO USE PROPER SERVICETOOLS MAY RESULT IN EQUIPMENT DAMAGE ORPERSONAL INJURY.SERVICEWARNINGThis information is intended for use by individuals pos ses s ing adequate backgrounds of electrical and mechanical experience. Any attempt to repair a central air condition ingproduct may result in personal injury and or p roperty damage.The manufacturer or seller cannot be respon sible for theinterpretation of this information, nor can it a ssume any liabilityin connection with its use.CAUTIONUSE ONLY R-410A REFRIGERANT ANDAPPROVED POE COMPRESSOR OIL.15 FT. ABOVE UNIT — UNRESTRICTEDNOTICE:Trane has always recommended installing Traneapproved matched indoor and outdoor systems.The benefits of installing approved matched systemsare maximum efficiency, optimum performance andbest overall system reliability.!WARNINGThese units use R-410A refrigerant which operates at 50 to 70%higher pressures than R-22. Use only R-410A approved serviceequipment. Refrigerant cylinders are painted a “Rose” color toindicate the type of refrigerant and may contain a “dip” tubeto allow for charging of liquid refrigerant into the system. AllR-410A systems use a POE oil that readily absorbs moisture fromthe atmosphere. To limit this “hygroscopic” action, the systemshould remain sealed whenever possible. If a system has beenopen to the atmosphere for more than 4 hours, the compressoroil must be replaced. Never break a vacuum with air and alwayschange the driers when opening the system for componentreplacement. For specific handling concerns with R-410A andPOE oil, reference Retrofit BulletinSSC-APG011-EN.Check for transportation damage after unit is uncrated.Report promptly, to the carrier, any damage found to theunit.To determine the electrical power requirements of the unit,refer to the nameplate of the unit. The electrical poweravailable must agree with that listed on the nameplate.B. Location and Preparationof the Unit1. When removing unit from the pallet, notice the tabs onthe basepan. Remove tabs by cutting with a sharp toolas shown in Figure 2 (see page 2).2. The unit should be set on a level support pad at leastas large as the unit base pan, such as a concreteslab. If this is not the application used please refer toapplication bulletin SSC-APG002-EN.3. The support pad must NOT be in direct contact withany structure. Unit must be positioned a minimumof 12" from any wall or surrounding shrubbery toinsure adequate airflow. Clearance must be provided

Installer’s Guide2BASEPAN TAB REMOVALin front of control box (access panels) & any other siderequiring service access to meet National ElectricalCode. Also, the unit location must be far enough awayfrom any structure to prevent excess roof run-off waterfrom pouring directly on the unit. Do not locate unit(s)close to bedroom(s).4. The top discharge area must be unrestricted for at leastfive (5) feet above the unit.5. When the outdoor unit is mounted on a roof, be sure theroof will support the unit’s weight. Properly selectedisolation is recommended to prevent sound or vibrationtransmission to the building structure.6. The maximum length of refrigerant lines from outdoorto indoor unit should NOT exceed sixty (60) feet.7. If outdoor unit is mounted above the air handler,maximum lift should not exceed sixty (60) feet (suctionline). If air handler is mounted above condensing unit,maximum lift should not exceed sixty (60) feet (liquidline).NOTE:Refer to “Refrigerant Piping Software” Pub. No. 32-3312-0*(the position of the * denotes the latest revision number).8. Locate and install indoor coil or air handler inaccordance with instruction included with that unit.C. Installing Refrigerant Lines! CAUTIONIf using existing refrigerant lines make certain that alljoints are brazed, not soldered.Condensing units have provisions for braze connections.Pressure taps are provided on the service valves of outdoorunit for compressor suction and liquid pressures.The indoor end of the recommended refrigerant line setsmay be straight or with a 90 degree bend, depending uponsituation requirements. This should be thoroughly checkedout before ordering refrigerant line sets.The gas line must always be insulated.!CAUTIONIn scroll compressor applications, dome temperaturesmay be hot. Do not touch top of compressor, may causeminor to severe burning.The units are factory charged with the system chargerequired when using fifteen (15) feet of rated connectingline. Unit nameplate charge is with twenty-five (25) feet ofline set.Final refrigerant charge adjustment is necessary.Use the Subcooling Charging procedure on page 6 or in theoutdoor unit Service Facts.1. Determine the most practical way to run the lines. 2009 Trane2. Consider types of bends to be made and space limitations.NOTE:Large diameter tubing will be very difficult to rebend onceit has been shaped.3. Determine the best starting point for routing therefrigerant tubing — INSIDE OR OUTSIDE THESTRUCTURE.4. Provide a pull-thru hole of sufficient size to allow bothliquid and gas lines.5. Be sure the tubing is of sufficient length.6. Uncoil the tubing — do not kink or dent.7. Route the tubing making all required bends and properly secure the tubing before making connections.8. To prevent a noise within the building structure due tovibration transmission from the refrigerant lines, thefollowing precautions should be taken:a. When the refrigerant lines have to be fastenedto floor joists or other framing in a structure, useisolation type hangers.b. Isolation hangers should also be used whenrefrigerant lines are run in stud spaces or enclosedceilings.c. Where the refrigerant lines run through a wall orsill, they should be insulated and isolated.d. Isolate the lines from all ductwork.D. Service Valve OperationBrass Liquid and Gas Line Service ValvesThe Brass Liquid and Gas Line Service Valves are factoryshipped in the seated position to hold factory charge. Thepressure tap service port (when depressed) opens only tothe field brazing side of the valve when the valve is in theseated position. The liquid line valve is not a back seatingvalve (see WARNING below).!WARNINGExtreme caution should be exercised when openingthe Liquid Line Service Valve. Turn valve stemcounterclockwise only until the stem contacts the rollededge. (See Figure 3.) No torque is required.Brass Gas Line Ball Service ValveThe Brass Gas Line Ball Service Valve is shipped in theclosed position to hold the factory refrigerant charge. Thepressure tap service port (when depressed) opens onlyto the field brazing side when the valve is in the closedposition. The Gas Line Ball Service Valve is full open witha 1/4 turn. See Figure 4.Brazing Refrigerant Lines1. Remove lower access cover to access service valves.2. Before brazing, remove plugs from external copper stubtubes. Clean internal and external surfaces of stubtubes prior to brazing.3. Cut and fit tubing, minimizing the use of sharp90 bends.4. Insulate the entire gas line and its fittings.5. Do NOT allow uninsulated liquid line to come in directcontact with bare gas line.6. Precautions should be taken to avoid heatdamage to the pressure tap valve core duringbrazing. It is recommended that the pressuretap port valve core be removed and a wet ragwrapped around the valve body.18-AC71D1-5

Installer’s Guide3LIQUID LINE SERVICE VALVE6. If vacuum gauge does not rise above 500 microns in one(1) minute, the evacuation should be complete.7. Blank off vacuum pump and micron gauge, close valveson manifold gauge set.NOTE:DO NOT VENT REFRIGERANT INTO THE ATMOSPHERE.NOTE:A 3/16" Allen wrench is required to open liquid lineservice valve. A 1/4" Open End or Adjustable wrench isrequired to open gas line valve. A 3/4" Open End wrenchis required to take off the valve stem cap.NOTE:Use care to make sure that no moisture enters pressuretap port, while wet rag is being used.NOTE:Precautions should be taken to avoid heat damage tobasepan during brazing. It is recommended to keep theflame directly off of the basepan.7. Use a Dry Nitrogen Purge and Brazing Alloy withoutflux when brazing the field line to the copper factoryconnection. Flow dry nitrogen into either valvepressure tap port, thru the tubing and out the otherport while brazing.8. Braze using accepted good brazing techniques.Leak CheckIMPORTANT:Replace pressure tap port valve core before attaching hosesfor evacuation.After the brazing operation of refrigerant lines to both theoutdoor and indoor units is completed, the field brazedconnections must be checked for leaks. Pressurize throughthe service valve ports, the indoor unit and field refrigerantlines with dry nitrogen to 350-400 psi. Use soap bubbles orother leak-checking methods to see that all field joints areleak-free! If not, release pressure; then repair!8. The liquid line shut-off valve can now be opened.Remove shut-off valve cap. Fully insert hex wrenchinto the stem and backout counterclockwise until valvestem just touches rolled edge (approximately five [5]turns) observing WARNING statement on page 2. See Figure 3.9. Replace liquid service pressure tap port cap and valvestem cap. These caps MUST BE REPLACED toprevent leaks. Replace valve stem cap and pressure tapcap finger tight, then tighten an additional 1/6 turn.10. The gas valve can now be opened. Open the gas valveby removing the shut-off valve cap and turning thevalve stem 1/4 turn counterclockwise, using 1/4" OpenEnd or Adjustable wrench. See Figures 4 and 5.11. The gas valve is now open for refrigerant flow. Replacevalve stem cap to prevent leaks. Again, these capsMUST BE REPLACED to prevent leaks. Replacevalve stem cap and pressure tap cap finger tight, thentighten an additional 1/6 turn. See Figures 4 and 5.If refrigerant lines are longer than fifteen (15) feetand/or a different size than recommended, it will benecessary to adjust system refrigerant charge uponcompletion of installation. See page 6 or the unitService Facts.4GAS LINE BALL SERVICE VALVECAP1/4 TURN ONLYCOUNTERCLOCKWISEFOR FULL OPENPOSITIONSystem EvacuationNOTE:Since the outdoor unit has a refrigerant charge, the gasand liquid line valves must remain closed.VALVE STEMUNIT SIDEOF VALVE1. Upon completion of leak check, evacuate the refrigerantlines and indoor coil before opening the gas and liquidline valves.PRESSURE TAP PORT2. Attach appropriate hoses from manifold gauge to gasand liquid line pressure taps.NOTE:Unnecessary switching of hoses can be avoided andcomplete evacuation of all lines leading to sealed systemcan be accomplished with manifold center hose andconnecting branch hose to a cylinder of R-410A andvacuum pump.GAS LINE CONNECTION5GAS LINE SERVICE VALVE3. Attach center hose of manifold gauges to vacuumpump.4. Evacuate until the micron gauge reads no higher than350 microns.5. Close off valve to vacuum pump and observe the microngauge. If gauge pressure rises above 500 microns in one (1)minute, then evacuation is incomplete or system has a leak.18-AC71D1-53