TRANE 4TWV0024A1000C Heat Pumps and Air Conditioners Installation Guide

TRANE 4TWV0024A1000C Heat Pumps and Air Conditioners

Product Information

The Variable Speed ComfortLinkTM II Heat Pumps and Air Conditioners are advanced HVAC systems designed for efficient heating, ventilation, and air conditioning. They come in different models with varying capacities:

• 4TWV0024A1000C
• 4TWV0036A1000C
• 4TWV0048A1000C
• 4TWV0060A1000C
• 4TTV0024A1000C
• 4TTV0036B1000C
• 4TTV0048A1000C
• 4TTV0060A1000C
• 4TTV0061A1000C

These systems feature variable speed technology for enhanced comfort and energy efficiency. Please note that the graphics in the user manual are for representation purposes only, and the actual model may differ in appearance.

Product Usage Instructions

Important Safety Warning:

Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air- conditioning equipment can be hazardous and require specific knowledge and training. Improper installation, adjustment, or alteration by an unqualified person could result in death or serious injury. When working on the equipment, observe precautions mentioned in the literature, tags, stickers, and labels attached to the equipment.

Safety Section – Outdoor:

Warning – Hazardous Voltage:

Before servicing, disconnect all electric power, including remote disconnects. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. Failure to follow this warning could result in property damage, severe personal injury, or death.

Caution – Hot Surface:

The top of the compressor can cause minor to severe burning. Do not touch the top of the compressor to avoid property damage or personal injury.

Caution – Contains Refrigerant:

Before opening the system, recover refrigerant to relieve pressure. Failure to follow proper procedures can result in personal illness or injury or severe equipment damage. The system contains oil and refrigerant under high pressure.

Caution – Grounding Required:

Reconnect all grounding devices. If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to the ground are removed for service, they must be returned to their original position and properly fastened. Failure to inspect or use proper service tools may result in equipment damage or personal injury.

Warning – Service Valves:

Extreme caution should be exercised when opening the Suction and Liquid Line Service Valve. Turn the valve stem counterclockwise only until the stem contacts the rolled edge. No torque is required. Failure to follow this warning may result in an abrupt release of the system charge and may cause personal injury and/or property damage.

Warning – High Leakage Current:

Ensure the earth connection before connecting the electrical supply. Failure to follow this warning could result in property damage, severe personal injury, or death.

Safety Section – Outdoor:

400 Volts Electrical Hazard:

Be aware of the electrical hazard associated with 400 volts. Take necessary precautions to ensure safety during installation and servicing.

Note: “Graphics in this document are for representation only. Actual model may differ in appearance.”

SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air- conditioning equipment can be hazardous and require specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.

SAFETY SECTION— OUTDOOR

Important— This document contains a wiring diagram and service information. This is customer property and is to remain with this unit. Please return to the service information pack upon completion of work.

WARNING
HAZARDOUS VOLTAGE!
Failure to follow this warning could result in property damage, severe personal injury, or death.
Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized.

WARNING
REFRIGERANT OIL!
Any attempt to repair a central air conditioning product may result in property damage, severe personal injury, or death. These units use R-410A refrigerant which operates at 50 to 70% higher pressures than R-22. Use only R -410A-approved service equipment. Refrigerant cylinders are painted a “Rose” color to indicate the type of refrigerant and may contain a “dip”  tube to allow for charging of liquid refrigerant into the system. All R-410A systems with variable-speed compressors use a PVE oil that readily absorbs moisture from the atmosphere. To limit this “hygroscopic” action, the system should remain sealed whenever possible. If a system has been open to the atmosphere for more than 4 hours, the compressor oil must be replaced. Never break a vacuum with air and always change the driers when opening the system for component replacement.

CAUTION
HOT SURFACE!
May cause minor to severe burning. Failure to follow this Caution could result in property damage or personal injury. Do not touch the top of the compressor.

CAUTION
CONTAINS REFRIGERANT!
Failure to follow proper procedures can result in personal illness or injury or severe equipment damage. The system contains oil and refrigerant under high pressure. Recover refrigerant to relieve pressure before opening the system.

CAUTION
GROUNDING REQUIRED!
Failure to inspect or use proper service tools may result in equipment damage or personal injury. Reconnect all grounding devices. All parts of this product that are capable of conducting electrical current are grounded. If grounding wires, screws,straps, clips, nuts, or washers used to complete a path to the ground are removed for service, they must be returned to their original position and properly fastened.

WARNING
SERVICE VALVES!
Failure to follow this warning will result in the abrupt release of the system charge and may result in personal injury and/or property damage. Extreme caution should be exercised when opening the Suction and Liquid Line Service Valve. Turn valve stem counterclockwise only until the stem contacts the rolled edge. No torque is required.

WARNING
BRAZING REQUIRED – IF USING MECHANICAL CONNECTIONS, ENSURE THE LEAK TEST IS NEGATIVE!
Failure to inspect lines or use proper service tools may result in equipment damage or personal injury. If using existing refrigerant lines make certain that all joints are brazed, not soldered.

WARNING
HIGH LEAKAGE CURRENT!
Failure to follow this warning could result in property damage, severe personal injury, or death.
The earth connection is essential before connecting the electrical supply

Approved Combinations for Variable Speed Units

• TCONT850, TZONE950, or TZON1050
• TAM9
• TAM8C
• TEM8
• S9V2 Furnace w/Relay Panel
• XC80 Furnace
• XC95m Furnace
• Approved System Accessories

Note: See the AHRI directory for approved indoor and outdoor model combinations. Only Trane / American Standard coils and air handlers are approved for use with variable-speed outdoor units.

Table 1. Operating Range

Important: Use caution when cleaning the outdoor coil to ensure no water enters the electrical control compartment. When cleaning coil from inside the compressor compartment, take special care not to spray water towards the top rows of the coil near the control panel. Water may enter the control compartment and drive damaging the electronics. Disconnect all electric power, including remote disconnects before servicing.

Scan to see an overview video about the IVSC Board

Unit Location Considerations

Models| H x D x W (in)| Weight * (lb)| ****

---|---|---|---
4TWV0024A| 46 x 30 x 33| 206
4TWV0036A| 48 x 34 x 37| 243
4TWV0048A| 48 x 34 x 37| 255
4TWV0060A| 52 x 34 x 37| 265
4TTV0024A| 46 x 30 x 33| 207
4TTV0036B| 48 x 34 x 37| 239
4TTV0048A| 48 x 34 x 37| 259
4TTV0060A| 52 x 34 x 37| 265
4TTV0061A| 52 x 34 x 37| 303

• Weight values are estimated (uncrated).
  •        When mounting the outdoor unit on a roof, be sure the roof will support the unit’s weight.

•        Properly selected isolation is recommended to alleviate sound or vibration transmission to the building structure.

Table 3. Refrigerant Line and Service Valve Connection Sizes

Model

| Rated Line Sizes| Service Valve Connection Sizes| ****

---|---|---|---
Vapor Line| Liquid Line| Vapor Line Connection| Liquid Line Connection
4TWV0024A| 5/8 (a)| 3/8| 3/4| 3/8
4TWV0036A| 3/4 (a)| 3/8| 3/4| 3/8
4TWV0048A| 7/8 (a)| 3/8| 7/8| 3/8
4TWV0060A| 7/8 (a)| 3/8| 7/8| 3/8
4TTV0024A| 5/8 (a)| 3/8| 3/4| 3/8
4TTV0036B| 3/4 (a)| 3/8| 3/4| 3/8
4TTV0048A| 7/8 (a)| 3/8| 7/8| 3/8
4TTV0060A| 1 — 1/8 (b)| 3/8| 7/8| 3/8
4TTV0061A| 1 — 1/8 (b)| 3/8| 7/8| 3/8
 |  |  |  |

• (a) The max length of refrigerant lines from outdoor to indoor units MUST NOT exceed 150 feet. The max vertical change MUST NOT exceed 50 feet.
• (b) The max length of refrigerant lines from outdoor to indoor units MUST NOT exceed 80 feet. The max vertical change MUST NOT exceed 25 feet.

Unit Location Considerations

Table 4. Alternate Refrigerant Line and Service Valve Connection Sizes

Model

| Alternate Line Sizes| Service Valve Connection Sizes
---|---|---
Vapor Line| Liquid Line| Vapor Line Connection| Liquid Line Connection
4TWV0024A| 3/4″ (a)| 5/16″| 3/4″| 3/8″
4TWV0036A| 5/8″ (a)| 5/16″| 3/4″| 3/8″
4TWV0048A| 3/4″ (a)| 3/8″| 7/8″| 3/8″

4TWV0060A

| 3/4″ (a)| 3/8″| 7/8″| 3/8″
7/8″ (a)| 3/8″| 7/8″| 3/8″

Model

| Alternate Line Sizes| Service Valve Connection Sizes
Vapor Line| Liquid Line| Vapor Line Connection| Liquid Line Connection
4TTV0024A| 3/4″ (a)| 5/16″| 3/4″| 3/8″
4TTV0036B| 5/8″ (a)| 5/16″| 3/4″| 3/8″
4TTV0048A| 3/4″ (a)| 3/8″| 7/8″| 3/8″

4TTV0060A

| 3/4″ (a)| 3/8″| 7/8″| 3/8″
7/8″ (a)| 3/8″| 7/8″| 3/8″

4TTV0061A

| 3/4″ (a)| 3/8″| 7/8″| 3/8″
7/8″ (a)| 3/8″| 7/8″| 3/8″

• (a) The max length of refrigerant lines from outdoor to indoor unit MUST NOT exceed 150 feet. The max vertical change MUST NOT exceed 50 feet.

Suggested Locations. **Table 5. Suggested Locations for Best Reliability

**

Table 6. Cold Climate Considerations (Heat Pump Only)

Note : It is recommended that these precautions be taken for units being installed in areas where snow accumulation and prolonged below-freezing temperatures occur.

• Units should be elevated 3–12 inches above the pad or rooftop, depending on local weather. This additional height will allow drainage of snow and ice melted during the defrost cycle prior to its refreezing. Ensure that drain holes in the unit base pan are not obstructed, preventing drainage of defrost water.
• If possible, avoid locations that are likely to accumulate snow drifts. If not possible, a snow drift barrier should be installed around the unit to prevent a build-up of snow on the sides ofthe unit.

Coastal Considerations
If installed within one mile of salt water, including seacoasts and inland waterways, models without factory-supplied Seacoast Salt Shields require the addition of BAYSEAC001 (Seacoast Kit) at installation time.

Unit Preparation

Setting Up the Unit

Table 7. Pad Installation

When installing the unit on a support pad, such as a concrete slab, consider the following:

•        The pad should be at least 1” larger than the unit on all sides.

•        The pad must be separate from any structure.

•        The pad must be level.

•        The pad should be high enough above grade to allow for drainage.

•        The pad location must comply with National, State, and Local codes.

| ****
---|---

Refrigerant Line Considerations

Table 8. Factory Charge
The outdoor condensing units are factory charged with the system charge required for the outdoor condensing unit, ten (10) feet of tested connecting line, and the smallest rated indoor evaporative coil match. Always verify proper system charge via subcooling (TXV/EEV).

Table 9. Required Refrigerant Line Length

• Determine the required line length and lift. You will need this to determine the subcooling charging corrections later in the installation process.
• Total Line Length = ___Ft.
• Total Vertical Change (lift) = ____Ft.

Table 10. Refrigerant Line Insulation

Important: The Vapor Line must always be insulated. DO NOT allow the Liquid Line and Vapor Line to come in direct (metal to metal) contact.
Note: The gas line must always be insulated. Insulating the liquid line through attic spaces may benefit system performance by minimizing heat gain in the liquid line.

Table 11. Reuse Existing Refrigerant Lines

CAUTION
REFRIGERANT!
Failure to inspect or use proper service toolsmay result in equipment damage or personal injury. If using existing refrigerant lines make certain that all joints are brazed, not soldered. For retrofit applications, where the existing indoor evaporator coil and/or refrigerant lines will be used, the following precautions should be taken.

• Ensure that the indoor evaporator coil and refrigerant lines are the correct size.
• Ensure that the refrigerant lines are free of leaks, acid, and oil. Important: For more information, see publication number SSAPG006– EN

Table 12. Refrigerant Line Routing Precautions

Important: Comply with National, State, and Local Codes when isolating line sets from joists, rafters, walls, or other structural elements.
Important: For buried line sets, see publication number SS-APG006–EN.
Important: Take precautions to prevent noise within the building structure due to vibration transmission from the refrigerant lines.

For Example:

• When the refrigerant lines must be fastened to floor joists or another framing in a structure, use isolation-type hangers.
• Isolation hangers should also be used when refrigerant lines are run in stud spaces or enclosed ceilings.
• Where the refrigerant lines run through a wall, sill or enclosed ceiling- they should be insulated, isolated, and serviceable if any connections are present.
• Isolate the lines from all ductwork.
• Minimize the number of 90° turns.

Table 13. Isolation From Joist/Rafter

Table 14. Isolation In Wall Spaces

Table 15. Isolation Through Wall

Refrigerant Line Brazing

Table 16. Braze the Refrigerant Lines

Table 16. Braze the Refrigerant Lines (continued)

Refrigerant Line Leak Check

Table 17. Check for Leaks

Refrigerant Line and Indoor Coil Evacuation

Service Valves

Table 18. Open the Gas Service Valve

Table 19. Open the Liquid Service Valve

Electrical— Low Voltage Communicating

Table 20. Low Voltage Maximum Wire Length

Table 20, 16 define the size and a combined total maximum length of low voltage wiring from the outdoor unit, to the indoor unit, and to the thermostat.

Note: The use of color-coded low-voltage wire is recommended to simplify connections between the outdoor unit, the control, and the indoor unit.

Note: The maximum total cable length for the entire comfort control communicating system is 500 ft. 18 AWG.

| CONTROL WIRING
---|---
WIRE SIZE| MAX. WIRE LENGTH

18 AWG

| ****

500 Ft. Combined

Table 21. Low Voltage Hook-up Diagrams

1. In communicating mode, unused terminals are non-functional. Do not use.
2. Terminals present will vary by indoor model.
3. D” is the data line. Installer to select a wire color.
4. If a 3rd party condensate overflow switch is installed, it should be wired in series with R to the thermostat or connected to the External Switch terminals on the AFC. See the External Switch wiring section in the air handler Installer’s Guide.
5. Wire is present only on Variable Speed Outdoor Units.

Note: Anti-oxidizing grease is supplied in the documentation package for use when making low-voltage field wiring connections at the outdoor unit. Apply grease to field wiring before installing wire caps to protect these connections from corrosion.

Electrical – High Voltage

Table 22. High Voltage Power Supply

WARNING
LIVE ELECTRICAL COMPONENTS!
Failure to follow this warning could result in property damage, severe personal injury, or death. Follow all electrical safety precautions when exposed to live electrical components. It may be necessary to work with live electrical components during installation, testing, servicing, and troubleshooting of this product.

The high-voltage power supply must agree with the equipment nameplate.
Power wiring must comply with national, state, and local codes. Follow instructions on unit wiring diagram located on the inside of the control box cover and in the Service Facts document included with the unit.

Table 23. High Voltage Disconnect Switch

WARNING
HIGH LEAKAGE CURRENT!
Failure to follow this warning could result in property damage, severe personal injury, or death. The earth connection is essential before connecting the electrical supply.

Install a separate disconnect switch at the outdoor unit. For high voltage connections, flexible electrical conduit is recommended whenever vibration transmission may create a noise problem within the structure.

Table 24. High Voltage Disconnect Switch

Integrated Variable Speed Control Board LED Indicators

Table 25. LED in clip mode

STATUS (GREEN)

| SLOW| 1 TIME PER SECOND| STANDBY/IDLE
MEDIUM| 2 TIMES PER SECOND| CALL FOR CAPACITY
FAST| 5 TIMES PER SECOND| POWER UP DELAY
SOLID ON|  | TEST MODE
INTERMITTENT| 1 FLASH EVERY 4 SECONDS| HARD LOCKOUT

Note: The STATUS Light is not illuminated in Link mode.

__Table 26.   LED in clip and Link modes

LED’S

STATUS (GREEN)

| SLOW| 1 TIME PER SECOND| STANDBY/IDLE
MEDIUM| 2 TIMES PER SECOND| CALL FOR CAPACITY
FAST| 5 TIMES PER SECOND| POWER UP DELAY
SOLID ON|  | TEST MODE
INTERMITTENT| 1 FLASH EVERY 4 SECONDS| HARD LOCKOUT
COMM (AMBER)| SLOW| 1 TIME PER DEVICE| DEVICE COUNT
FAST| 5 TIME PER SECOND| LOSS OF COMMUNICATION

Start-Up

System Charge Adjustment

Table 27. Temperature Measurements

Table 28. Subcooling Charging Corrections

Determine the final subcooling value using total Line Length and Lift measured in “Required Refrigerant Line Length” and the “Subcooling Charging Corrections Charts.”

| Subcooling Charging Correction Worksheet

Total Line Length (ft)        __

Total Vertical Charge (lift)   ____

(Values from — Required Refrigerant Line Length)

Design Subcooling Value    ____

(from nameplate or Service Facts)

Final Subcooling Value ____

---|---

Note: The only mode approved for setting or validating system charge is using Charging Mode-Cooling. Charging Mode-Cooling is a variable speed test mode found in the 850/950/1050 and UX360 comfort control Technician Menus. Test modes can also be accessed using the Diagnostic Mobile App on Link systems. Outdoor Temperature must be between 55°F and 120°F with Indoor Temperature kept between 70°F and 80°F.
Important: VARIABLE SPEED OUTDOOR UNITS REQUIRE THE INDOOR UNIT BE CONFIGURED FOR 400 CFM/TON IN clii MODE.

Subcool Charging Correction Charts

Refrigerant Charging Chart

R-410A REFRIGERANT CHARGING CHART

LIQUID TEMP (°F)

| ****

DESIGN SUBCOOLING (°F)

8| 9| 10| 11| 12| 13| 14

LIQUID GAGE PRESSURE (PSI)

55| 179| 182| 185| 188| 191| 195| 198
60| 195| 198| 201| 204| 208| 211| 215
65| 211| 215| 218| 222| 225| 229| 232

Subcool Charging Correction Charts

R-410A REFRIGERANT CHARGING CHART

70| 229| 232| 236| 240| 243| 247| 251
75| 247| 251| 255| 259| 263| 267| 271
80| 267| 271| 275| 279| 283| 287| 291
85| 287| 291| 296| 300| 304| 309| 313
90| 309| 313| 318| 322| 327| 331| 336
95| 331| 336| 341| 346| 351| 355| 360
100| 355| 360| 365| 370| 376| 381| 386
105| 381| 386| 391| 396| 402| 407| 413
110| 407| 413| 418| 424| 429| 435| 441
115| 435| 441| 446| 452| 458| 464| 470
120| 464| 470| 476| 482| 488| 495| 501
125| 495| 501| 507| 514| 520| 527| 533

Charging the Unit

Important: ENSURE INDOOR BLOWER IS CONFIGURED FOR 400 CFM/TON

Table 29. Proper Gage Pressure

Using the Standard R-410A Subcool Charging Chart, adjust the refrigerant level to attain proper gauge pressure.
Add refrigerant if the Liquid gauge pressure is lower than the chart value.

1. Connect gauges to refrigerant bottle and unit as illustrated.
2. Purge all hoses.
3. Open bottle.
4. Stop adding refrigerant when the liquid line temperature and Liquid gauge pressure match the charging chart.

Note: Recover refrigerant if the Liquid gauge pressure is higher than the chart value.

Table 30. Stabilize the system

Table 31. Verify Performance

Table 32. System Information

9. Record system pressures and temperatures after charging is complete.

Outdoor model number =           Measured Outdoor Ambient =    °F Measured Indoor Ambient =      °F Measured Liquid Line Temp =    °F

Measured Suction Line Temp = __ °F

| ****

Indoor Wet Bulb =             °F Liquid Gage Pressure =     PSIG Suction Gage Pressure = __ PSIG

---|---

Subcooling Charging Below 55º F Outdoor Temp. (In Heating Only)

Table 33. Subcooling Charging Below 55º F Outdoor Temp. (In Heating Only)

The Subcooling Charging method in cooling is not recommended below 55º F outdoor temperature. The only recommended method of charging at outdoor temperatures below 55º F is weighing in the charge in heating mode and referencing the refrigerant pressure curves for typical performance.

STEP 1 – Determine the additional charge.
Note: The nameplate charge value represents the amount of refrigerant shipped in the outdoor unit and is compatible with 10 feet of AHRI-rated refrigerant lines and the smallest AHRI-rated coil.

Using the method below, find the charge associated with the additional length of tubing above 10 ft. and record it below.

The Weigh-In Method can be used for the initial installation or any time a system charge is being replaced. The Weigh-In Method can also be used when power is not available to the equipment site or operating conditions (indoor/outdoor temperatures) are not in range to verify with the subcooling charging method.

Calculating Charge Using the Weigh-In Method

1. Measure in feet the distance between the outdoor unit and the indoor unit. (Include the entire length of the line from the service valve to the IDU.) Subtract 10 ft from this entire length and record on line 1.
2. Enter the charge multiplier (0.6 oz/ft). Each linear foot of interconnecting tubing requires the addition of 0.6 oz of refrigerant.
3. Multiply the total length of refrigerant tubing (Line 1) times the value on Step 2. Record the result on Line 3 of the Worksheet.
4. This is the amount of refrigerant to weigh in prior to opening the service valves.

Total Line length (ft) –10 ft ___
Charge multiplier x 0.6 oz__
Step 1 x Step 2 = __
Refrigerant (oz) = __

STEP 2 – Stabilize the system by operating for a minimum of 20 minutes.
At startup, or whenever a charge is removed or added, the system must be operated for a minimum of 20 minutes to stabilize before accurate measurements can be made.

STEP 3 – Check the liquid line temperature and liquid gauge pressure to obtain a minimum of 10º subcooling in heating mode.
Measured Liquid Line Temp = __ º F
Liquid Gage Pressure = __ PSIG

STEP 4 – Add charge if a minimum of 10º subcooling is not obtained with the nameplate charge plus additional charge previously added.

STEP 5 – Return to site for adjustment.
Important: Return in the spring or summer to accurately charge the system in the cooling mode with outdoor ambient above 55º F.

Communicating Display Assembly (CDA)

Defrost Control (Heat Pump only)

Demand Defrost
The demand defrost control measures the heat pump’s outdoor ambient temperature with a sensor located outside the outdoor coil. A second sensor located on the outdoor coil is used to measure the coil temperature. The difference between the ambient and the colder coil temperature is the difference or delta-T measurement. This delta-T measurement is representative of the operating state and relative capacity of the heat pump system. By measuring the change in delta-T, we can determine the need for defrost. The coil sensor also serves to sense outdoor coil temperature for the termination of the defrost cycle.

Fault Identification
A fault condition is indicated by the CDA connected to the control board inside the heat pump control box.

Defrost Enabled Demand Defrost is enabled with the following inputs to the Integrated Variable Speed Control (IVSC):

• The outdoor ambient temperature sensor (ODS-B) reports an outdoor temperature at or below 52° F.
• The coil temperature sensor (CBS) reports a coil temperature at or below 35° F.
• Heat/Cool Demand (HCD) from the communicating comfort control for at least two minutes or more.

Defrost Initiation
The calculated temperature difference between the outdoor temperature sensor and the coil temperature sensor is called Delta T. Defrost can occur once the current Delta T exceeds the Delta T initiate value. . Thisadaptive logic assures a complete defrost for a range of outdoor temperatures.

CDA Navigation to Forced Defrost

Checkout Procedures

The final phase of the installation is the system Checkout Procedures. The following list represents the most common items covered in a Checkout Procedure. Confirm all requirements in this document have been met.

• All wiring connections are tight and properly secured.
• Voltage and running current are within limits.
• All refrigerant lines (internal and external to equipment) are isolated, secure, and not in direct contact with each other structure.
• All braze connections have been checked for leaks. A vacuum of 350 microns provides confirmation that the refrigeration system is free and dry.
• Final unit inspection to confirm factory tubing has not shifted during shipment. Adjust tubing if necessary so tubes do not rub against each other or any component when the unit runs.
• The ductwork is sealed and insulated.
• All drain lines are clear with joints properly sealed. Pour water into drain pan to confirm proper drainage. Provide enough water to ensure drain trap is primed.
• Supply registers and return grilles are open, unobstructed, and air the filter is installed.
• Indoor blower and outdoor fan are operating smoothly and without obstruction.
• Indoor blower motor set on correct speed setting to deliver required CFM. “Blower and fan set screws are tight.”
• Cover panels are in place and properly tightened.
• For gas heating systems, manifold pressure has been checked and all gas line connections are tight and leak free.
• For gas heating systems, flue gas is properly vented.
• The system functions safely and properly in all modes.
• The owner has been instructed on use of system and given a manual.

Trane – by Trane Technologies (NYSE: TT), a global innovator – creates comfortable, energy-efficient indoor environments for commercial and residential applications. For more information, please visit trane. com or tranetechnologies.com.

The AHRI Certified mark indicates Trane U.S. Inc. participation in the AHRI Certification program. For verification of individual certified products, go to ahri directory. org.
Trane has a policy of continuous data improvement and it reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.

• 18-BC89D1-1M-EN 19 Jul 2023
• Supersedes 18-BC89D1-1L-EN (April 2020)

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