Installation, Operation, and Maintenance

Introduction

Read this manual thoroughly before operating or servicing this unit.

Warnings, Cautions, and Notices

Safety advisories appear throughout this manual as required. Your personal safety and the proper operation of this machine depend upon the strict observance of these precautions.

The three types of advisories are defined as follows:

• WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
• CAUTION: Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices.
• NOTICE: Indicates a situation that could result in equipment or property-damage only accidents.

Important Environmental Concerns

Scientific research has shown that certain man-made chemicals can affect the earth's naturally occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment. Trane advocates the responsible handling of all refrigerants-including industry replacements for CFCs and HCFCs such as saturated or unsaturated HFCs and HCFCs.

Important Responsible Refrigerant Practices

Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified according to local rules. For the USA, the Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment that is used in these service procedures. In addition, some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants. Know the applicable laws and follow them.

Safety Warnings

WARNING: Proper Field Wiring and Grounding Required! Failure to follow code could result in death or serious injury. All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/ state/national electrical codes.

WARNING: Personal Protective Equipment (PPE) Required! Failure to wear proper PPE for the job being undertaken could result in death or serious injury. Technicians, in order to protect themselves from potential electrical, mechanical, and chemical hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well as the instructions below:

• Before installing/servicing this unit, technicians MUST put on all PPE required for the work being undertaken (Examples; cut resistant gloves/sleeves, butyl gloves, safety glasses, hard hat/bump cap, fall protection, electrical PPE and arc flash clothing). ALWAYS refer to appropriate Safety Data Sheets (SDS) and OSHA guidelines for proper PPE.
• When working with or around hazardous chemicals, ALWAYS refer to the appropriate SDS and OSHA/GHS (Global Harmonized System of Classification and Labelling of Chemicals) guidelines for information on allowable personal exposure levels, proper respiratory protection and handling instructions.
• If there is a risk of energized electrical contact, arc, or flash, technicians MUST put on all PPE in accordance with OSHA, NFPA 70E, or other country-specific requirements for arc flash protection, PRIOR to servicing the unit. NEVER PERFORM ANY SWITCHING, DISCONNECTING, OR VOLTAGE TESTING WITHOUT PROPER ELECTRICAL PPE AND ARC FLASH CLOTHING. ENSURE ELECTRICAL METERS AND EQUIPMENT ARE PROPERLY RATED FOR INTENDED VOLTAGE.

©2020

Safety and Policies

WARNING: Follow EHS Policies! Failure to follow instructions below could result in death or serious injury.

• All Trane personnel must follow the company's Environmental, Health and Safety (EHS) policies when performing work such as hot work, electrical, fall protection, lockout/ tagout, refrigerant handling, etc. Where local regulations are more stringent than these policies, those regulations supersede these policies.
• Non-Trane personnel should always follow local regulations.

WARNING: Refrigerant under High Pressure! Failure to follow instructions below could result in an explosion which could result in death or serious injury or equipment damage. System contains refrigerant under high pressure. Recover refrigerant to relieve pressure before opening the system. See unit nameplate for refrigerant type. Do not use non-approved refrigerants, refrigerant substitutes, or refrigerant additives.

WARNING: Explosion Hazard! Failure to follow instructions below could result in an explosion which could result in death or serious injury, and equipment damage. NEVER bypass system safeties in order to pump down the unit component's refrigerant into the microchannel heat exchanger (MCHE) coil. Do NOT depress the compressor contactor since it effectively bypasses the high-pressure control.

WARNING: Refrigerant under High Pressure! Failure to follow instructions below could result in an explosion which could result in death or serious injury or equipment damage. System contains refrigerant under high pressure. Recover refrigerant to relieve pressure before opening the system. See unit nameplate for refrigerant type. Do not use non-approved refrigerants, refrigerant substitutes, or refrigerant additives.

Copyright and Trademarks

This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in part without written permission. Trane reserves the right to revise this publication at any time, and to make changes to its content without obligation to notify any person of such revision or change.

All trademarks referenced in this document are the trademarks of their respective owners.

Revision History

• Wiring matrix has been updated.
• Minor running edits included.

Model Number Description

Heat Pump Condenser

Digit 1, 2, 3 -- Unit Function: TWA = Split System Heat Pump

Digit 4, 5, 6 -- Tonnage:

• 060 = 5 Tons (50Hz)
• 072 = 6 Tons (60 Hz)
• 076 = 6.25 Tons (50Hz)
• 090 = 7.5 Tons (60 Hz)
• 101 = 8.33 Tons (50Hz)
• 120 = 10 Tons (60 Hz)
• 156 = 13.0 Tons (50Hz)
• 180 = 15 Tons (60 Hz)
• 201 = 16.7 Tons (50Hz)
• 240 = 20 Tons (60 Hz)

Digit 7 -- Refrigerant:

• 2 = R-22
• 4 = R-410A

Digit 8 -- Voltage:

• 3 = 208-230 Vac - 3 PH (60Hz)
• 4 = 460 Vac - 3 PH (60Hz)
• W = 575 Vac - 3 PH (60Hz)
• D = 380-415 Vac- 3 PH (50Hz)
• K = 380 Vac - 3 PH (60Hz)

Digit 9 -- Refrigeration Circuit/Stage:

• A = 1 Compressor/1 Line/1 Stage (Single)
• D = 2 Compressors/2 Line/2 Stage (Dual)

Digit 10 -- Major Design Sequence: A = Rev A

Digit 11 -- Minor Design Sequence: A = Rev A

Digit 12, 13 -- Service Digits: **

Digit 14 -- Efficiency Generation: A = Generation A

Digit 15 -- Controls: S = Symbio™

Digit 16 -- None: 0 = None

Digit 17 -- Coil Protection:

• 0 = Standard Coil
• 1 = Standard Coil w/ Hail Guard
• 2 = Black Epoxy Pre-Coated Condenser Coil (FIN/TUBE)
• 3 = Black Epoxy Pre-Coated Condenser Coil with Hail Guard (FIN/TUBE)

Digit 18, 19, 20 -- None: 0 = None

Digit 21 -- Communications Options:

• 0 = No Option
• 1 = Advanced Diagnostics and BACnet® BAS
• 2 = Advanced Diagnostics and LonTalk® Communications Interface (LCI)

Digit 22 to 40 -- None: 0 = None

General Information

This manual describes proper installation, operation, and maintenance procedures for air-cooled systems. By carefully reviewing the information within this manual and following the instructions, the risk of improper operation and/or component damage will be minimized. It is important that periodic maintenance be performed to help assure trouble free operation. Should equipment failure occur, contact a qualified service organization with qualified, experienced HVAC technicians to properly diagnose and repair this equipment.

Important: All phases of this installation must comply with the NATIONAL, STATE & LOCAL CODES. In addition to local codes, the installation must conform with National Electric Code - ANSI/NFPA NO. 70 LATEST REVISION.

Any individual installing, maintaining, or servicing this equipment must be properly trained, licensed and qualified.

Important: Do not remove the VFD without first contacting technical support! For performance-related questions and diagnostic support in North America call 1-877-872-6363. Any return requires a claim number FIRST. Removal of the VFD prior to this step will void the unit's warranties.

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 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 problems arise that are not fully discussed in this manual, contact your local sales office.

Use the "Installation Checklist," p. 8 provided in this manual to verify that all necessary installation procedures have been completed. Do not use the checklist as a substitute for reading the information contained in this manual. Read this entire manual before beginning installation procedures.

Unit Description

These condensers come with single and dual compressor options. Single compressor outdoor units feature a single refrigeration circuit requiring only one set of refrigerant lines. Dual compressor/dual circuit models give true stand-by protection; if one compressor fails, the second will automatically start-up. During light load conditions, only one compressor will operate to save energy.

Pre-Installation

Unit Inspection

Inspect material carefully for any shipping damage. If damaged, it must be reported to, and claims made against the transportation company. Compare the information that appears on the unit nameplate with ordering and submittal data to ensure the proper unit was shipped. Available power supply must be compatible with electrical characteristics specified on component nameplates. Replace damaged parts with authorized parts only.

Important: Units ordered with a VFD cannot be field converted to 460 V from 208-230 or from 208-230 V to 460 V.

Inspection Checklist

To protect against loss due to damage incurred in transit, complete the following checklist upon receipt of the unit.

• Inspect individual pieces of the shipment before accepting the unit. Check for obvious damage to the unit or packing material.
• Inspect the unit for concealed damage before it is stored and as soon as possible after delivery. Concealed damage must be reported within 15 days. If concealed damage is discovered, stop unpacking the shipment. Do not remove damaged material from the receiving location. Take photos of the damage if possible. The owner must provide reasonable evidence that the damage did not occur after delivery.
• Notify the carrier's terminal of damage immediately by phone and by mail. Request an immediate joint inspection of the damage by the carrier and the consignee.
• Notify the sales representative and arrange for repair. Do not repair the unit until the damage is inspected by the carrier's representative.

Testing for Leaks

All units are shipped with a holding charge of nitrogen in each circuit and should be leak tested before installation.

1. Remove the access panel.
2. Locate the liquid line or suction line access valve for each circuit.
3. Install gauges to determine if the circuits are still pressurized. If not, the charge has escaped and should be repaired as required to obtain a leak-free circuit.

Lifting Recommendations

WARNING: Improper Unit Lift! Failure to properly lift unit in a LEVEL position could result in unit dropping and possibly crushing operator/technician which could result in death or serious injury, and equipment or property-only damage. Test lift unit approximately 24 inches (61 cm) to verify proper center of gravity lift point. To avoid dropping of unit, reposition lifting point if unit is not level.

NOTICE: Equipment Damage! Use spreader bars to prevent straps from damaging the unit. Install the bars between lifting straps, both underneath the unit and above the unit to prevent the straps from crushing the unit cabinet or damaging the finish.

Before preparing the unit for lifting, estimate the approximate center of gravity for lifting safety. Because of placement of internal components, the unit weight may be unevenly distributed. See "Weights," p. 16 for approximate unit weights.

The crated unit can be moved using a forklift of suitable capacity. For lifting the unit, attach lifting straps or slings securely to the lifting holes at each corner (see unit drawings in "Weights," p. 16). Use spreader bars to protect the unit casing from damage. Test lift the unit to determine proper balance and stability.

Clearances

Provide enough space around the unit to allow unrestricted access to all service points. Refer to the "Dimensional Data," p. 10 for unit dimensions and minimum required service and free air clearances. Observe the following points to ensure proper unit operation.

1. Do not install the unit under a low overhang. Condenser discharge must not be restricted--refer to notes in "Dimensional Data drawings," p. 10. Important: Do not obstruct condenser discharge air. This can result in warm air recirculation through the coil.
2. Do not locate the unit in a position where runoff water, or falling snow from roof, can fall into the fan discharge openings.
3. Condenser intake air is supplied from three or four sides of the unit. Adhere to the minimum required clearances given in unit dimensional drawings (see "Dimensional Data," p. 10).

Unit Mounting

WARNING: Risk of Roof Collapsing! Failure to ensure proper structural roof support could cause the roof to collapse, which could result in death or serious injury and property damage. Confirm with a structural engineer that the roof structure is strong enough to support the combined weight of the roofcurb, the unit, and any accessories.

Structural Preparation

NOTICE: Roof Damage! System contains oil and refrigerant under high pressure. Roofs should be protected from exposure to oils and refrigerant in the system. If rooftop is not protected, damage to the roof may occur.

Important: Refer to local building codes for proper installation. All installation must comply with local building codes.

Rooftop Mounting

If the unit will be roof mounted, determine for certain that the structure is strong enough to support the unit and any required accessories, see "Weights," p. 16. The unit should be elevated on a level, field fabricated four-inch steel or wood 4" x 4" mounting frame. Complete the frame and secure it into position before lifting the unit to the roof. The mounting frame must support a minimum of three of the unit's four sides and should span roof supports to distribute the load on the roof.

Figure 1. Roof mounted unit depicts a typical roof-mounted unit setup, showing the outdoor unit, insulated gas (suction) and liquid lines, unit mounting channels, elevation via a mounting frame, roof construction, roof trussing, and ceiling.

Ground Level Mounting

For ground level installation, the unit base should be adequately supported and hold the unit near level. The installation must meet the guidelines set forth in local codes. The support should extend two inches beyond the unit base channels at all points. The unit and support must be isolated from any adjacent structure to prevent possible noise or vibration problems. Any ground level location must comply with required clearances given in the unit dimensional drawings (see "Dimensional Data," p. 10).

Snow Belt Recommendations

In regions where deep snow is encountered, raise the unit a minimum distance of 8 to 12 inches above the mounting surface. This will reduce the risk of snow blocking the coil and improves runoff of water produced during the defrost cycle. Avoid locating the unit where snow tends to drift. Snow accumulations must be removed from around the unit immediately to prevent drastic efficiency reduction. A snow drift barrier may be constructed around the unit to prevent snow blockage. Clearance between the snow barrier and the unit must comply with the clearances given in "Dimensional Data drawings," p. 10.

Installation Checklist

Complete this checklist once the unit is installed to verify that all recommended procedures have been accomplished before starting the system. Do not operate the system until all items covered by this checklist are complete.

• Inspect unit location for proper required service clearances.
• Inspect unit location for proper free air clearances.
• Inspect unit location for secure, level mounting position.
• Verify condenser fans turn freely without rubbing and are properly tightened on the shafts.

Refrigerant Piping

• Properly sized/constructed liquid and suction lines connected to stubs at both the indoor and outdoor units?
• Insulated the entire suction line?
• Insulated portions of liquid line exposed to extremes in temperature?
• Performed initial leak test?

Electrical Wiring

• Evacuated each refrigerant circuit to 500 microns?
• Charged each circuit with proper amount of R-410A/ R-22?
• Provided unit power wiring (with disconnect) to proper terminals in the unit control enclosure?
• Installed system indoor thermostat or zone sensor?
• Installed system low voltage interconnecting wiring to proper terminals of outdoor unit, indoor unit and system thermostat or zone sensor?
• Checked all electrical connections to verify all are properly tightened and connected?
• Verified operation of crankcase heaters?

Heat Pump Dimensions

Figure 2. Height, width and depth measurements shows the general dimensions of the units.

Figure 3. 5, 6, 6.25, 7.5 ton R-410A and 7.5 ton R-22 heat pump, single compressor (in inches) shows dimensional details and notes on clearances, including minimum operational clearance and recommended service clearance.

Figure 4. 5, 6, 6.25, 7.5 ton R-410A heat pump, dual compressor (in inches) shows dimensional details and notes on clearances, including minimum operational clearance and recommended service clearance.

Figure 5. 8.33, 10 ton R-410A and 10 ton R-22 heat pump, single compressor (in inches) shows dimensional details and notes on clearances, including minimum operational clearance and recommended service clearance.

Figure 6. 8.33, 10 ton heat pump, dual compressor (in inches) shows dimensional details and notes on clearances, including minimum operational clearance and recommended service clearance.

Figure 7. 13, 15, 16.7 and 20 ton R-410A and 15, 20 ton R-22 heat pump, dual compressor (in inches) shows dimensional details and notes on clearances, including minimum operational clearance and recommended service clearance.

Weights

Heat Pump Condenser

Table 1. TWA R-410A unit and corner weights -- lbs (60 Hz) provides weight data for various models.

Table 2. TWA R-22 unit and corner weights -- lbs (60 Hz) provides weight data for various models.

Table 3. TWA R-410A unit and corner weights -- kg (50 Hz) provides weight data for various models.

Figure 8. TWA072, 090, 120, TWA060, 076, 101, TWA0902*A, 1202*A and Figure 9. TWA180, 240, TWA156, 201, TWA1802*D, TWA2402*D illustrate lifting points on the units, labeled #1 through #4.

Installation

Refrigerant Piping Guidelines

Figure 10. Allowable elevation difference: TWA above indoor unit and Figure 11. Allowable elevation difference: TTA or TWA below indoor unit are charts showing acceptable suction-riser and liquid-riser heights based on total line length. Contact the manufacturer for review for specific applications.

Note: Route refrigerant piping for minimum linear length, minimum number of bends and fittings.

Important: Read Application Guide SS-APG008*-EN thoroughly before installing this unit.

Refrigerant Piping Procedures (Outdoor Units)

WARNING: R-410A Refrigerant under Higher Pressure than R-22! Failure to use proper equipment or components as described below, could result in equipment failing and possibly exploding, which could result in death, serious injury, or equipment damage. The units described in this manual use R-410A refrigerant which operates at higher pressures than R-22. Use ONLY R-410A rated service equipment or components with these units. For specific handling concerns with R-410A, please contact your local Trane representative.

WARNING: Refrigerant under High Pressure! Failure to follow instructions below could result in an explosion which could result in death or serious injury or equipment damage. System contains refrigerant under high pressure. Recover refrigerant to relieve pressure before opening the system. See unit nameplate for refrigerant type. Do not use non-approved refrigerants, refrigerant substitutes, or refrigerant additives.

Each unit ships with a holding charge of dry nitrogen. The nitrogen should be removed and the entire system evacuated (at the proper time) to avoid possible contamination.

1. Remove the compressor service access panel.
2. Locate the liquid and suction line access valves. Check that the piping connection stubs (Figure 12, p. 19) line up properly with the holes in the unit cabinet.
3. Install gauges to determine if the circuits are still pressurized. If not, the charge has escaped and should be repaired as required to obtain a leak-free circuit. If the circuits are still pressurized, use the gauges to slowly release the nitrogen charge to the atmosphere and remove both seal caps from the outdoor unit connection stubs.

NOTICE: System Component Damage! Do not remove the seal caps from refrigerant connections until prepared to braze refrigerant lines to the connections. Excessive exposure to atmosphere (> 5 min.) may allow moisture or dirt to contaminate the system, damaging valve seals and causing ice formation in system components.

Figure 12. Outdoor units - refrigerant piping (with dry nitrogen) illustrates the setup for refrigerant piping with gauges connected.

WARNING: Explosion Hazard and Deadly Gases! Failure to follow all proper safe refrigerant handling practices could result in death or serious injury. Never solder, braze or weld on refrigerant lines or any unit components that are above atmospheric pressure or where refrigerant may be present. Always remove refrigerant by following the guidelines established by the EPA Federal Clean Air Act or other state or local codes as appropriate. After refrigerant removal, use dry nitrogen to bring system back to atmospheric pressure before opening system for repairs. Mixtures of refrigerants and air under pressure may become combustible in the presence of an ignition source leading to an explosion. Excessive heat from soldering, brazing or welding with refrigerant vapors present can form highly toxic gases and extremely corrosive acids.

4. Cut, fit and braze tubing, starting at the outdoor unit and work toward the indoor unit. See "Charging Levels," p. 23.

Note: Use long radius ells for all 90° bends.

All brazing should be done using a 2 to 3 psig dry nitrogen purge flowing through the pipe being brazed, see Figure 12, p. 19.

NOTICE: System Component Damage! Install a regulating valve between the nitrogen source and the gauge manifold. Unregulated pressure can damage system components.

NOTICE: System Component Damage! Wet-wrap all valves and protect painted surfaces from excessive heat. Heat can damage system components and the unit finish.

5. Shut off nitrogen supply. Shut off the manifold valve for the line that is connected to the suction line access valve. Disconnect the line from the access valve.

Refrigerant Piping Procedures (Indoor Unit)

Once liquid and suction lines are complete to the refrigerant connections on the indoor unit, remove the gauge port core(s) on the indoor unit connection stubs to release the dry nitrogen charge.

1. Remove both seal caps from the indoor unit connection stubs.

NOTICE: Unit Damage! Do not apply heat to remove seal caps until the gauge port cores have been removed. If seal caps are intact, application of heat may generate excessive pressure in the unit and result in damage to the coil or expansion valve.

NOTICE: Unit Damage! Do not remove the seal caps from refrigerant connections until prepared to braze refrigerant lines to the connections. Due to the high hygroscopic properties of the R-410A oil, excessive exposure to atmosphere will allow moisture to contaminate the system, damaging the compressor.

2. Turn on nitrogen supply. Nitrogen enters through the liquid line gauge port.
3. Braze the liquid line connections.
4. Open the gauge port on the suction line and then braze the suction line to the connection stub. Nitrogen will bleed out the open gauge port on the suction line.
5. Shut off nitrogen supply.

Leak Check

WARNING: Explosion Hazard! Failure to follow these instructions could result in death or serious injury or equipment or property-only damage. Use only dry nitrogen with a pressure regulator for pressurizing unit. Do not use acetylene, oxygen or compressed air or mixtures containing them for pressure testing. Do not use mixtures of a hydrogen containing refrigerant and air above atmospheric pressure for pressure testing as they may become flammable and could result in an explosion. Refrigerant, when used as a trace gas should only be mixed with dry nitrogen for pressurizing units.

WARNING: Explosion Hazard! Failure to follow safe leak test procedures below could result in death or serious injury or equipment or property-only-damage. Never use an open flame to detect gas leaks. Use a leak test solution for leak testing.

After the brazing operation of refrigerant lines to both the outdoor and indoor unit is completed, the field brazed connections must be checked for leaks. Pressurize the system through the gauge port with dry nitrogen to 200 psi. Use soap bubbles or other leak-checking methods to ensure that all field joints are leak free. If not, release pressure, repair and repeat leak test.

System Evacuation

1. After completion of leak check, evacuate the system.
2. Attach appropriate hoses from manifold gauge to gas and liquid line pressure taps.

Note: Unnecessary switching of hoses can be avoided and complete evacuation of all lines leading to sealed system can be accomplished with manifold center hose and connecting branch hose to a cylinder of R-410A/R-22 and vacuum pump.

3. Attach center hose of manifold gauges to vacuum pump.

NOTICE: Operating Under Vacuum! Failure to follow these instructions will result in compressor failure. Do not operate or apply power to the compressor while under a vacuum.

4. Evacuate the system to hold a 500 micron vacuum.
5. Close off valve to vacuum pump and observe the micron gauge. If gauge pressure rises above 500 microns in one minute, then evacuation is incomplete or the system has a leak.
6. If vacuum gauge does not rise above 500 microns in 10 minutes, the evacuation should be complete.

NOTICE: Equipment Damage! Charge with access port on the liquid line only.

7. With vacuum pump and micron gauge blanked off, open valve on refrigerant cylinder and allow refrigerant pressure to build up to about 80 psig.
8. Close valve on the refrigerant supply cylinder. Close valves on manifold gauge set and remove refrigerant charging hoses from liquid and gas gauge ports.
9. Leak test the entire system. Using proper procedures and caution, as described in the previous section, repair any leaks found and repeat the leak test.

Insulating and Isolating Refrigerant Lines

Insulate the entire suction line with refrigerant piping insulation. Also insulate any portion of the liquid line exposed to temperature extremes. Insulate and isolate liquid and suction lines from each other. Isolate refrigerant lines from the structure and any duct work.

Important:

1. To prevent possible noise or vibration problems, be certain to isolate refrigerant lines from the building.
2. All suction and hot gas bypass piping (if installed) should be insulated from the termination in the air handler to the condensing unit cabinet entry. Failure to do so can cause condensate drip off and performance degradation.
3. Prior to starting a unit, it is advisable to have the approved oils available in the event oil needs to be added to the system.
4. Refer to Application Guide SS-APG008*-EN for units needing additional oil and for oil amounts.

NOTICE: Equipment Damage! This is POE oil, which readily absorbs moisture. Always use new oil and never leave containers open to atmosphere while not in use.

Table 4. R-410A TWA approved oils lists approved oils for specific unit models.

Table 5. R-22 TWA approved oils lists approved oils for specific unit models.

For units equipped with compressors containing site glasses, the oil level must be visible through the sight glass when the compressor is running under stabilized conditions and a few minutes after the compressor has stopped.

Refrigerant Charging Procedure

If charging by weight, refer to "Charging Levels," p. 23 for starting change. If refrigerant adjustments are needed because of length of line, refer to the Charging Charts and Superheat values available on unit access panels.

Refer to Wiring Matrix and Device Location Matrix for list of charging charts and super heat tables available in e-Library. Charge by weight through the gauge port on the liquid line.

Notes:

• Refrigerant should only be charged in the liquid state.
• When possible, always charge the refrigerant into the liquid line of the unit.
• If the entire charge can't be charged into the liquid line, the balance of the unit charge can be metered through a charging manifold set as liquid -- preferably through a schrader valve into the suction line to the compressor -- only while the compressor is running.
• Check and adjust superheat using the superheat table, then re-check charging charts to determine if charge corrections are necessary. Refer to Charging Data for list of super heat tables available in e-Library.

NOTICE: Equipment Damage! Never charge liquid refrigerant into the suction line of the unit with the compressor off.

Figure 13. Outdoor units - refrigerant piping shows the setup for refrigerant charging.

Charging Levels

Important: For the correct line diameter, for line lengths greater than 25 feet, see the Odyssey Application Guide (SS-APG008*-EN) available through e-Library or your local sales office.

Table 6. Estimated charge levels at ARI rated line lengths (25 feet) lists estimated refrigerant charge levels and line diameters for various matched sets.

Notes:

• For line lengths other than 25', please refer to the Application Guide (SS-APG008*-EN) for charge levels, oil addition and line sizes.
• For additional support with line lengths or refrigerant charge, refer to the Application Guide or contact Product Support.
• TWA0604DA and TWA0724*A need a reducer for vapor line. (1.375 to 1.125) (1 3/8" to 1 1/8").
• TWA0604DD and TWA0724*D need a reducer for vapor line (1.125 to 0.875) (1 1/8" to 7/8").

Figure 10. Allowable elevation difference: TWA above indoor unit and Figure 11. Allowable elevation difference: TTA or TWA below indoor unit are charts showing acceptable suction-riser and liquid-riser heights based on total line length. Contact the manufacturer for review for specific applications.

Note: Route refrigerant piping for minimum linear length, minimum number of bends and fittings.

Important: Read Application Guide SS-APG008*-EN thoroughly before installing this unit.

Liquid Charging

This procedure is accomplished with the unit operating. Electrical connections must be complete. Do not proceed until the system is ready to operate.

Note: The compressor access panel must be installed when the unit is running and being charged. Manifold hoses must be routed through refrigerant gauge access hole(s). See "Dimensional Data," p. 10 for specific locations.

WARNING: Live Electrical Components! Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. When it is necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks.

1. Turn on power to the unit. Allow the system to run for 15 minutes to stabilize operating conditions.
2. Measure airflow across the indoor coil. Compare the measurements with the fan performance data in the Data/Submittal. Once proper airflow is established, compare discharge pressure and liquid temperature to the charging charts. Add or remove refrigerant (liquid only) as required to obtain correct discharge pressure and liquid temperature.
3. Check suction line superheat and condenser sub-cooling to ensure the unit is operating properly.
4. Disconnect all power to the unit.

Important: If the unit is charged and left without power until a later date, the crankcase heater should be energized for a minimum of 8 hours prior to powering the compressor(s).

WARNING: Hazardous Voltage w/Capacitors! Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer's literature for allowable waiting periods for discharge of capacitors. Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have discharged. For additional information regarding the safe discharge of capacitors, see PROD-SVB06*-EN.

5. Remove the charging system from the unit.
6. Replace all panels.

Electrical Wiring

WARNING: Proper Field Wiring and Grounding Required! Failure to follow code could result in death or serious injury. All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/ state/national electrical codes.

Field wiring consists of providing power supply to the unit, installing the system indoor thermostat or zone sensor and providing low voltage system interconnecting wiring. Access to electrical connection locations is shown in "Dimensional Data," p. 10. Determine proper wire sizes and unit protective fusing requirements by referring to the unit nameplate. Field wiring diagrams for accessories are shipped with the accessory.

Unit Power Supply

The installer must provide line voltage circuit(s) to the unit main power terminals as shown by the unit wiring diagrams. Adhesive backed diagrams are affixed inside the control box cover panel. Wiring diagrams are also available through e-Library or by contacting a local sales office. Power supply must include a disconnect switch in a location convenient to the unit. Ground the unit according to local codes and provide flexible conduit if codes require and/or if vibration transmission may cause noise problems.

Important: All wiring must comply with applicable local and national (NEC) codes. Type and location of disconnect switches must comply with all applicable codes.

NOTICE: Use Copper Conductors Only! Failure to use copper conductors could result in equipment damage as the equipment was not designed or qualified to accept other types of conductors.

Low Voltage Wiring

Mount the indoor thermostat, zone sensor, or programmable zone sensor in accordance with the corresponding thermostat installation instructions. Install color-coded, weather-proof, multi-wire cable according to the field wiring instructions (see "Field Wiring," p. 26).

Note: Refer to thermostat or zone sensor wire installation guide for proper wire gauge.

Symbio™ Controls

Wiring shown with dashed lines is to be furnished and installed by the customer. All customer supplied wiring must be copper only and must conform to NEC and local electrical codes. Codes may require line of sight between disconnect switch and unit.

Figure 14. Symbio™ jobsite connections illustrates typical connections between the disconnect switch, air handler, electric heat accessory, thermostat, and zone sensor.

• Power Wires: A. 3 wires, line voltage for 3 phase, (2 wires for single phase) 1 grounding wire; B. 3 wires, line voltage for 3 phase, (2 wires for single phase) 1 grounding wire
• Control Wires: C. Heat Pump thermostat: 6 to 9 wires depending on T'stat options and stages of cooling and heating; D. Wiring between indoor and outdoor unit: 5 to 11 wires depending on unit control options*; E. Zone Sensor: 4 to 7 wires depending on zone sensor model*
• *Communication signal wires require twisted pairs. Refer to unit schematics for identification of twisted pairs.

Notes:

• When electric heater accessory is used, single point power entry or dual point power entry is field optional. Single point power entry option is through electric heater only.
• ***Choose only one of the following; Thermostat, Mechanical Zone Sensor, Programmable Zone Sensor Panel or BAS Zone Sensor.

Important: For the EDC switch to be functional and thereby facilitate reliable unit operation, make the EDC connections from the indoor to the outdoor control boxes.

Table 7. Recommended thermostat wire size provides guidance on wire gauge versus maximum wire length.

Table 8. Zone sensor module wiring provides recommended wire sizes based on distance from unit to control.

Table 9. Field wiring instructions details wiring connections for various condenser and air handler pairings.

Note: Gray shaded cells indicate older legacy units.

(a) Contact the local Trane Commercial Sales office to receive a copy of Hub Case details.

(b) 2-Speed Air Handler (identified by a "C" in digit 15) is specifically designed as a replacement air handler for a system with a legacy electromechanical condenser.

Pairing A: Symbio Heat Pump with Constant Volume Air Handler

Figure 15. Symbio™ 700 unit controller wiring shows the wiring connections for this pairing.

• 1. Zone temperature control: a. Connect a thermostat or other zone control device to the Symbio™ 700 Unit Controller as shown in Figure 15, p. 27.
• 2. Refer to Air Handler IOM (SSA-SVX06*-EN) for instructions on interconnecting wiring between Air Handler and Heat Pump.

Pairing B: Symbio Heat Pump with SZVAV / 2-Speed Air Handler

Figure 16. Modbus and IMC connections schematic illustrates the Modbus and IMC connections.

• 1. Zone control (see Figure 15, p. 27): a. For 2-Speed Air Handler operation, connect a thermostat or other zone control device to the Symbio 700 Unit Controller as shown on unit schematic. b. For SZVAV Operation, connect a zone sensor or other BAS zone control device.
• 2. Make MODBUS and IMC connections between the outdoor and indoor units as shown on the unit schematic (see Figure 16, p. 28). Important: Ensure MODBUS and IMC signal wires (+, -) are twisted pairs.
• 3. If desired, make connection for the air handler coil defrost control switch between the outdoor and indoor units as shown on the unit schematic (see Figure 17, p. 28).
• 4. Refer to the air handler IOM (SSA-SVX06*-EN) for other required connections between air handler and Heat Pump.

Figure 17. Connection schematic for air handler defrost control switch shows the wiring for the defrost control switch.

Refrigerant Circuit

Figure 18. Typical split system heat pump - cooling - refrigerant circuit and Figure 20. Typical split system heat pump - cooling - refrigerant circuit illustrate the refrigerant flow in cooling mode, showing components like the compressor, filter drier, expansion valve, 4-way switchover valve, and various switches (HPCO, DTL, LPCO).

Figure 19. Typical split system heat pump - heating - refrigerant circuit and Figure 21. Typical split system heat pump - heating - refrigerant circuit illustrate the refrigerant flow in heating mode, including a de-ice loop.

Note A: Only one outdoor and indoor coil refrigerant entry and exit circuit is shown. All models have multiple entry and exit circuits.

Note B: Dual circuit models have 2 refrigeration circuits.

Pre-Start

Control Circuit Features

Note: Not all of these features may be required for your unit, check electrical schematic.

Discharge Temperature Limit (DTL): The control's sensor is located on the discharge line. This device will shut off the compressor and the outdoor fan(s) if the discharge temperature exceeds the DTL setting. Once the discharge temperature has returned to normal, the compressor will cycle back on.

Low Outdoor Ambient Cooling: All Odyssey units with Symbio™ 700 controls have cooling capabilities down to 0°F as standard. At temperatures below 50°F, some reduction in cooling capacity can be expected. When the optional Low Ambient Accessory kit is field installed, the full capacity of the unit is available down to 0°F.

Evaporator Defrost Control (EDC): This control is located in the Air Handler. The control's sensing tube is embedded vertically in the evaporator coil, near the center. This device will stop the compressor if the indoor coil temperature drops below its setting. The indoor air will still circulate across the coil bringing the temperature of the coil back up to the cut-in temperature of the evaporator defrost control.

Low Pressure Cut-Out (LPC): This control's sensor is located in the suction (gas) line, near the compressor. This control will stop the compressor and the outdoor fans if suction pressure drops below the Low Pressure Cut-Out setting. Once the suction pressure has returned to normal, the compressor and outdoor fans will cycle back on.

High Pressure Cut-Out (HPCO): This control's sensor is located in the discharge line. This device will shut off the compressor and the outdoor fan(s) if the discharge pressure exceeds the High Pressure Cut-Out's setting. Once the discharge pressure has returned to normal, the compressor will cycle back on.

WARNING: Prevent Injury! Due to agency safety requirements, no schrader core is to be installed beneath the HPCO. Removal of the HPCO without evacuating the system charge could cause injury and release of refrigerant.

Internal Overload Protector (IOL): This device is embedded in the compressor. It will shut off the compressor if the discharge temperature of the compressor exceeds its design trip temperature.

Note: The IOL will put the compressor back in operation once the compressor motor heat has dropped below the trip setting; however, a check of the refrigerant and electrical systems should be made to determine the cause and be corrected.

Troubleshooting

WARNING: Live Electrical Components! Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. When it is necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks.

Refer to the latest version of the Symbio™ 700 Applications Guide (ACC-APG001*-EN) for details on troubleshooting the control system.

Service Test Mode

The Symbio™ 700 supports a Service Test Mode that can be used to energize the various components of the system, either to support general system startup tasks or to support troubleshooting. The user can initiate Service Test Mode through the controller user interfaces, including the Symbio Service and Installation mobile application.

The modes shown below can be initiated. Depending on the equipment configuration, the controller will energize the appropriate outputs. A user-selected timeout value will determine how long the controller will remain in any given state once initiated. For detailed information on how each Service Test State is interpreted based on the equipment's configuration, refer to the Symbio 700 Odyssey Controls Application Guide ((ACC-APG001*-EN).

Figure 22. Symbio 700 service test mode shows screenshots of the service test mode interface.

Maintenance

WARNING: Hazardous Voltage w/Capacitors! Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer's literature for allowable waiting periods for discharge of capacitors. Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have discharged. For additional information regarding the safe discharge of capacitors, see PROD-SVB06*-EN.

NOTICE: Operating Under Vacuum! Failure to follow these instructions will result in compressor failure. Do not operate or apply power to the compressor while under a vacuum.

Perform all of the indicated maintenance procedures at the intervals scheduled. This will prolong the life of the unit and reduce the possibility of costly equipment failure.

Monthly

Conduct the following maintenance inspections once per month.

• Check unit wiring to ensure all connections are tight and that the wiring insulation is intact.
• Inspect the condenser coils for dirt and debris. If the coils appear dirty, clean them.
• With the unit operating in the cooling mode, check the suction and discharge pressures and compare them with Pressure Curve values. Record these readings on the "Maintenance Log," p. 36.

Annually (Cooling Season)

The following maintenance procedures must be performed at the beginning of each cooling season to ensure efficient unit operation.

• Perform all of the monthly maintenance inspections.
• With the unit operating, check unit superheat and record the reading in the "Maintenance Log," p. 36.

Remove any accumulation of dust and/or dirt from the unit casing.

Remove corrosion from any surface and repaint. Check the gasket around the control panel door to ensure it fits correctly and is in good condition to prevent water leakage.

Inspect the control panel wiring to ensure that all connections are tight and that the insulation is intact.

Note: Condenser fan motors are permanently lubricated.

Check refrigerant piping and fittings for leaks

Inspect the condenser coils for dirt and debris. If the coils appear dirty, clean them.

Coil Cleaning

Regular coil maintenance, including annual cleaning--enhances the unit's operating efficiency by minimizing:

• compressor head pressure and amperage draw
• water carryover
• fan brake horsepower
• static pressure losses

At least once each year -- or more often if the unit is located in a "dirty" environment -- clean the coil using the instructions outlined below. Be sure to follow these instructions as closely as possible to avoid damaging the coils.

Tube and Fin

Note: To clean refrigerant coils, use a soft brush and a sprayer. Contact your local Parts Center for appropriate detergents.

1. Remove enough panels from the unit to gain safe access to coil.
2. Straighten any bent coil fins with a fin comb.
3. Remove loose dirt and debris from both sides of the coil with a soft brush.
4. Mix the detergent with water according to the manufacturer's instructions. If desired, heat the solution to 150° F maximum to improve its cleansing capability.
5. Pour the cleaning solution into the sprayer.
6. Spray the leaving-airflow side of the coil first; then spray the opposite side of the coil. Allow the cleaning solution to stand on the coil for five minutes.
7. Rinse both sides of the coil with cool, clean water.
8. Inspect both sides of the coil; if it still appears to be dirty, repeat Step 7 and 8.
9. Reinstall all of the components and panels removed in Step 1; then restore power to the unit.
10. Using a fin comb, straighten any coil fins that were inadvertently bent during the cleaning process.

Maintenance Log

The maintenance log provides a table to record inspection data, including Date, Ambient Temp., Evaporator Entering Air (Dry Bulb, Wet Bulb), Compressor (Suction Pressure C1/C2, Discharge Pressure C1/C2), Superheat (°F), and Subcooling (°F).

Note: Perform each inspection once per month (during cooling season) while unit is operating.

Charging Data and Pressure Curves

Table 10. TWA Charging data and pressure curves lists refrigerant charging curve superheat and charge table numbers, and pressure curve numbers for various condenser and air handler combinations.

Wiring Diagram Matrix and Device Location

Table 11. TWA wiring diagrams lists part numbers, descriptions, and applicability for various wiring diagrams.

Table 12. TWA device location lists part numbers and applicability for device location prints.

Warranty

For Commercial Unitary Equipment Rated 25 Tons and Under and Related Accessories

Products Covered -- This warranty is extended by Trane, and applies to the following products:

• All packaged and split system air conditioners and heat pumps have a rated capacity of 25 tons and under.
• All packaged combinations gas/electric air conditioners having a rated capacity of 25 tons and under.
• All packaged combination gas/electric air conditioners having a rated capacity of 1.5 through 5 tons single phase electric power and used for commercial applications. (As used in this warranty, a commercial application is any application where the end purchaser uses the product for other than personal, family or household purposes.)
• All accessories for the above products which are sold by Trane and applied in accordance with Trane specifications.

Basic Warranty

The warrantor warrants for a period of twelve (12) months from the initial start-up or eighteen (18) months from date of shipment, whichever is sooner, that the products covered by this warranty (1) are free from defects in material and manufacture, and (2) have the capacities and ratings set forth in the warrantor's catalogs and bulletins. If any part of your air conditioner fails because of a manufacturing defect, Warrantor will furnish without charge the required replacement part.

Any local transportation, related service labor and diagnosis calls are not included. In addition, if the sealed motor-compressor fails because of a manufacturing defect within the second through fifth year from the date of original purchase, Warrantor will furnish without charge the required replacement compressor.

Exclusions and Limitations

The warrantor's obligations and liabilities under this warranty are limited to furnishing F.O.B. factory or warehouse at the warrantor-designated shipping point, freight allowed to Buyer's city (or port of export for shipments outside the conterminous United States) a replacement product or, at the option of the warrantor, parts for the repair of the product not conforming to this warranty and which have been returned to the warrantor.

The warrantor's warranty is conditional on the Customer providing written notice to the warrantor within thirty (30) days of the discovery of the defect. No product shall be returned to the warrantor without the warrantor's written permission. No liability whatever shall attach to warrantor until said products have been fully paid for and then said liability shall be limited to the purchase price of the equipment shown to be defective.

The warranty does not apply to any compressor or gas-fired heat exchanger which has been repaired or altered in such manner as, in the judgement of the warrantor, affects its stability or reliability. This warranty does not cover (1) any heat exchanger which has been fired with an improper type of fuel (2) a heat exchanger which is installed in a beauty parlor, dry cleaning establishment, de-greasing plant or in any corrosive atmosphere; or (3) any heat exchanger which is not shown to be defective by the warrantor's inspection.

This warranty does not cover damage due to accident, abuse, improper use, external causes, freezing, corrosion, erosion or deterioration. Local transportation, related service labor, air filters, diagnosis calls, refrigerant and related items are not covered.

THE WARRANTY AND LIABILITY SET FORTH HEREIN ARE IN LIEU OF ALL OTHER WARRANTIES AND LIABILITIES, WHETHER IN CONTRACT OR IN NEGLIGENCE, EXPRESS OR IMPLIED, IN LAW OR IN FACT, INCLUDING IMPLIED WARRANTIES OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ANY IMPLIED WARRANTIES OTHERWISE ARISING FROM THE COURSE OF DEALING OR TRADE. IN NO EVENT SHALL THE WARRANTOR BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES.

The warrantor makes certain further warranty protection available on an optional, extra-cost basis. Any further warranty must be in writing. If you wish further help or information concerning this warranty, contact: Trane -- Warrantor, 2701 Wilma Rudolph Blvd., Clarksville, TN 37040

Company Information

Trane and American Standard create comfortable, energy efficient indoor environments for commercial and residential applications. For more information, please visit trane.com or americanstandardair.com.

Trane and American Standard have a policy of continuous product and product data improvement and reserve the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.