Trane 4TTX5018A1000A, 4TTX5024A1000A, 4TTX5049E1000A, 4TTX5048A1000A, 4TTX5060A1000A Installer's Manual

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18-AC74D1-4

Installer’s Guide

Condensing Units

4TTX5018A–060A, 049E

ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES

IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service information pack upon completion of work.

These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.

Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. All of the manufacture’s split systems are A.H.R.I. rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and outdoor split systems are maximum efficiency, optimum performance and the best overall system reliability.

Table of Contents

Section 1. Safety .....................................................................................2

Section 2. Unit Location Considerations..............................................3

Section 3. Unit Preparation .................................................................... 5

Section 4. Setting the Unit ..................................................................... 5

Section 5. Refrigerant Line Considerations ......................................... 6

Section 6. Refrigerant Line Routing .....................................................7

Section 7. Refrigerant Line Brazing ...................................................... 8

Section 8. Refrigerant Line Leak Check ............................................. 10

Section 9. Evacuation ...........................................................................11

Section 10. Service Valves ................................................................... 11

Section 11. Electrical - Low Voltage .................................................... 13

Section 12. Electrical - High Voltage ................................................... 16

Section 13. Start Up .............................................................................. 17

Section 14. System Charge Adjustment ............................................. 18

Section 15. Checkout Procedures and Troubleshooting ................... 22

Section 1. Safety

▲

WARNING

▲

WARNING

▲

WARNING

▲

WARNING

▲

CAUTION

▲

CAUTION

▲

WARNING

This information is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience. Any attempt to repair a central air conditioning product may result in personal injury and/or property damage. The manufacture or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.

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 use a POE 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. For specific handling concerns with R-410A and POE oil reference Retrofit Bulletins SS-APG006-EN and APP-APG011-EN.

LIVE ELECTRICAL COMPONENTS! During installation, testing, servicing, and troubleshooting of this product, it may be necessary to work with live electrical components. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.

If using existing refrigerant lines make certain that all joints are brazed, not soldered.

Scroll compressor dome temperatures may be hot. Do not touch the top of compressor; it may cause minor to severe burning.

UNIT CONTAINS R-410A REFRIGERANT! R-410A operating pressures exceed the limit of R-22. Proper service equipment is required. Failure to use proper service tools may result in equipment damage or personal injury.

SERVICE

USE ONLY R-410A REFRIGERANT AND AP-

PROVED POE COMPRESSOR OIL.

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

2 18-AC74D1-4

Section 2. Unit Location Considerations

60’

Max Vertical Change

Standard Line Set

60’ Max

Line Length

60’

Max Vertical Change

2.1 Unit Dimensions and Weight

Table 2.1

Unit Dimensions and Weight

Models H x D x W (in)

4TTX5018A1000A

4TTX5024A1000A

4TTX5030A1000A

4TTX5036A1000A

4TTX5042A1000A

4TTX5048A1000A

4TTX5049E1000A

4TTX5060A1000A

* Weight values are estimated.

41 x 34 x 37 227

41 x 34 x 37 230

41 x 34 x 37 232

50 x 34 x 37 254

50 x 34 x 37 257

54 x 34 x 37 302

54 x 34 x 37 287

54 x 34 x 37 304

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.

Please refer to application bulletin SSCAPG006-EN for detailed mounting information.

Weight* (lb)

2.2 Refrigerant Piping Limits

1. The maximum length of refrigerant lines from outdoor to indoor unit should NOT exceed sixty (60) feet.

2. The maximum vertical change should not exceed sixty (60) feet.

3. Service valve connection diameters are shown in Table 5.1.

Note: For line lengths greater than sixty (60) feet, Refer to Refrigerant Piping Application Guide, SS-APG006-EN or Refrigerant Piping Software Program, 32-3312-03 (or latest revision).

18-AC74D1-4 3

Min. 12” to Shrubbery

Avoid Install Near Bedrooms

Min 5’ Unrestricted

Access Panel

Min 3’ Unrestricted

2.3 Suggested Locations for Best Reliability

Min. 12” to Shrubbery

Min. 12” to Wall

Ensure the top discharge area is unrestricted for at least five (5) feet above the unit.

Three (3) feet clearance must be provided in front of the control box (access panels) and any other side requiring service.

Do not locate close to bedrooms as operational sounds may be objectionable.

Position the outdoor unit a minimum of 12” from any wall or surrounding shrubbery to ensure adequate airflow.

Outdoor unit location must be far enough away from any structure to prevent excess roof runoff water from pouring directly on the unit.

2.4 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. Please refer to Application Guide SS-APB006-EN: Trane - Sea Coast Applications and Seascoast Corrosion Protection Bulletin UN-SVB11A-EN.

4 18-AC74D1-4

Section 3. Unit Preparation

3.1 Prepare The Unit For Installation

STEP 1 - Check for damage and report prompt-

ly to the carrier any damage found to the unit.

STEP 2 - To remove the unit from the pallet, remove tabs by cutting with a sharp tool.

Section 4. Setting the Unit

4.1 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.

For other applications refer to Application Guide SSC-APG006-EN.

18-AC74D1-4 5

Section 5. Refrigerant Line Considerations

Line Length

5.1 Refrigerant Line and Service Valve Connection Sizes

Table 5.1

Line Sizes Service Valve Connection Sizes

Model

4TTX5018A1000A 1/2 3/8 1/2 3/8

4TTX5024A1000A 5/8 3/8 5/8 3/8

4TTX5030A1000A 3/4 3/8 3/4 3/8

4TTX5036A1000A 3/4 3/8 3/4 3/8

4TTX5042A1000A 3/4 3/8 3/4 3/8

4TTX5048A1000A 7/8 3/8 7/8 3/8

4TTX5049E1000A 7/8 3/8 7/8 3/8

4TTX5060A1000A 7/8 3/8 7/8 3/8

Vapor

Line

5.2 Factory Charge

Trane outdoor condensing units are factory charged with the system charge required for the outdoor condensing unit, ﬁfteen (15) feet of tested connecting line, and the smallest indoor evaporative coil match. If connecting line

length exceeds ﬁfteen (15) feet and/or a larger indoor evaporative coil is installed, then ﬁnal refrigerant charge adjustment is necessary.

Liquid

Line

Vapor Line

Connection

Liquid Line

Connection

5.3 Required Refrigerant Line Length

Determine required line length and lift. You will need this later in STEP 2 of Section 14.

Total Line Length = __________ Ft.

Total Vertical Change (lift) = __________ Ft.

5.4 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.

Liquid Line

Vapor Line

Insulation

6 18-AC74D1-4

5.5 Reuse Existing Refrigerant Lines

▲

CAUTION

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 numbers SS-APG006-EN and APPAPG011-EN.

Section 6. Refrigerant Line Routing

6.1 Precautions

Important: Take precautions to prevent noise within the building structure due to vibration transmission from the refrigerant lines.

For Example:

• When the refrigerant lines have to be fastened to floor joists or other 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 or sill, they should be insulated and isolated.

• Isolate the lines from all ductwork.

• Minimize the number of 90º turns.

8 Feet Maximum

Side View

8 Feet Maximum

Secure Vapor line from joists using isolators every 8 ft. Secure Liquid Line directly to Vapor line using tape, wire, or other appropriate method every 8 ft.

Comply with National, State, and Local Codes when isolating line sets from joists, rafters, walls, or other structural elements.

Joist/Rafter

Isolator

Line Set

18-AC74D1-4 7

Isolation From Joist/Rafter

8 Feet Maximum

Wall

Isolator

Wall

Side View

8 Feet Maximum

Line Set

Secure Vapor Line using isolators every 8 ft. Secure Liquid Line directly to Vapor Line using tape, wire, or other appropriate method every 8 ft.

Isolation In Wall Spaces

Sealant

Ductwork

Insulation

Vapor Line

Isolator

Line Set

Isolation Through Wall

Section 7. Refrigerant Line Brazing

7.1 Braze The Refrigerant Lines

STEP 1 - Remove caps or plugs. Use a debur-

ing tool to debur the pipe ends. Clean both internal and external surfaces of the tubing using an emery cloth.

DO NOT hang line sets from ductwork

8 18-AC74D1-4

STEP 2 - Remove the pressure tap cap and valve cores from both service valves.

STEP 3 - Purge the refrigerant lines and indoor coil with dry nitrogen.

STEP 4 - Wrap a wet rag around the valve body to avoid heat damage and continue the dry nitrogen purge.

Braze the refrigerant lines to the service valves.

Continue the dry nitrogen purge. Do not remove the wet rag until all brazing is completed.

Important: Remove the wet rag before stopping the dry nitrogen purge.

NOTE: Precautions should be taken to avoid heat damage to basepan during brazing. It is recommended to keep the flame directly off of the basepane.

18-AC74D1-4 9

STEP 5 - Replace the pressure tap valve cores

150 PSI

after the service valves have cooled.

Section 8. Refrigerant Line Leak Check

8.1 Check For Leaks

STEP 1 - Pressurize the refrigerant lines and

evaporator coil to 150 PSIG using dry nitrogen.

STEP 2 - Check for leaks by using a soapy solution or bubbles at each brazed location.

Remove nitrogren pressure and repair any leaks before continuing.

10 18-AC74D1-4

Section 9. Evacuation

1 MIN.

0350

Microns

OFF

CAP

1/4 TURN ONLY COUNTERCLOCKWISE FOR FULL OPEN POSITION

VALVE STEM

GAS LINE CONNECTION

UNIT SIDE OF VALVE

PRESSURE TAP PORT

9.1 Evacuate the Refrigerant Lines and Indoor Coil

Important: Do not open the service valves until the refrigerant lines and indoor coil leak check and evacuation are complete.

STEP 1 - Evacuate until the micron gauge reads no higher than 350 microns, then close off the valve to the vacuum pump.

STEP 2 - Observe the micron gauge. Evacuation is complete if the micron gauge does not rise above 500 microns in one (1) minute.

Once evacuation is complete blank off the vacuum pump and micron gauge, and close the valves on the manifold gauge set.

Section 10. Service Valves

10.1 Open the Gas Service Valve

Important: Leak check and evacuation must be completed before opening the service valves.

NOTE: Do not vent refrigerant gases into the atmosphere

STEP 1 - Remove valve stem cap.

STEP 2 - Using an adjustable wrench, turn valve

stem 1/4 turn counterclockwise to the fully open position.

STEP 3 - Replace the valve stem cap to prevent leaks. Tighten finger tight plus an additional 1/6 turn.

18-AC74D1-4 11

10.1 Open the Liquid Service Valve

▲

WARNING

Important: Leak check and evacuation must be completed before opening the service valves.

STEP 1 - Remove service valve cap.

STEP 2 - Fully insert 3/16” hex wrench into the

stem and back out counterclockwise until valve stem just touches the rolled edge (approximately five (5) turns.)

STEP 3 - Replace the valve cap to prevent leaks. Tighten finger tight plus an additional 1/6 turn.

Cap

Unit Side

of Service

Valve

Service Port

3/16” Hex Wrench

Rolled Edge to

Captivate Stem

Hex Headed

Valve System

Section 11. Electrical - Low Voltage

11.1 Low Voltage Maximum Wire Length

Table 11.1 defines the maximum total length of low voltage wiring from the outdoor unit, to the indoor unit, and to the thermostat.

Table 11.1

24 VOLTS

WIRE SIZE MAX. WIRE LENGTH

18 AWG 150 Ft.

16 AWG 225 Ft.

14 AWG 300 Ft.

12 18-AC74D1-4

11.2 Low Voltage Hook-up Diagrams

Red Yellow

Green White Black

Blue

W1 W2

Yellow

Blue

Comfort Control

Air Handler

Air Conditioner

W1 W2 W3

Neatly bundle all low voltage wires behind the service valve cover as shown.

Comfort Control

Va riable Speed Furnace

Air Conditioner

Neatly bundle all low voltage wires behind the service valve cover as shown.

Red Yellow

Green White

Blue

W1 W2

BK Y

Yellow

Blue

Black

Air Handler Hook-up Diagram

Notes:

1. If electric heat does not have 3rd contactor (CH), connect a jumper wire from W3 to W2. If electric heat does not have 2nd contactor (BH), connect a jumper wire from W2 to W1.

2. Ylo and BK may not be present on unit.

Variable Speed Furnace Hook-up Diagram

18-AC74D1-4 13

Notes:

1. If single stage heating thermostat is used, jumper W1-W2 on furnace terminal strip.

Red Yellow

Green White Black

Blue

Red

Brown

Blue

Comfort Control

Comm. Variable Speed

Furnace or Air Handler

D R

Communicating Comfort Control

(*CONT900)

Comm. Variable Speed

Furnace or Air Handler

Air Conditioner

W1 W2 W3

B O

BK D Y1

Neatly bundle all low voltage wires behind the service valve cover as shown.

W1 W2 W3

B O

Neatly bundle all low voltage wires behind the service valve cover as shown.

Yellow

Blue

Yellow

Blue

Communicating Indoor Unit with 24 V Control Hook-up Diagram

Notes:

1. See User Interface setup menu for 24 VAC control mode and cooling CFM options.

2. W3 terminal may not be present on unit.

3. If single stage heating thermostat is used, jumper W1-W2 on furnace terminal strip.

Communicating Indoor Unit in Comm. Mode Hook-up Diagram

14 18-AC74D1-4

Notes:

1. See User Interface setup menu for cooling CFM options.

2. W3 terminal may not be present on unit.

Red

Yellow

Green

White

Blue

Yellow

Green

White

Blue

B - Blue

Blue

G Y

Y - Yellow

Yellow

Red

Orange

Comfort Control

Air Handler

Field wiring

O ** R ** B

YI (In)

YO (Out)

Neatly bundle all low voltage wires behind the service valve cover as shown.

Air Conditioner

Comfort Control

Air Handler

Air Conditioner

Neatly bundle all low voltage wires behind the service valve cover as shown.

Field wiring

Yellow

Blue

Red

Yellow

Green

White

Blue

B - Blue

W G Y1

Y1 - Yellow

O R B

YO Y2 DH/BK

(In)

(Out)

1 2 3 4 5

2(Compressor)

2(Stages)

AC (S ystem)

}

OUTDOOR

Capacity(Tons)

OUTDOOR

}

Torque

CFM/Ton

CoolOffDelay

}

INDOOR

CFM

+12V

R13

R14

RNET 1

RNET 2

C22

C19

C15C

C10

*AM7 Air Handler Hook-up Diagram

Control Board

Must configure to

“ON” for AC Units.

GAM5 Air Handler Hook-up Diagram

18-AC74D1-4 15

Must configure to “OFF” for

single-stage compressors.

* For multiple stages of 1. electric heat, jumper W1, W2, and W3 together if comfort control has only one stage of heat.

** R to 2. O jumper must be in place as shown for cooling only, non-heat pump systems for proper operation.

Yi and Yo connections 3. must be made as shown for freeze protection and internally mounted condensate overflow circuits to work properly.

Internally mounted con-4. densate switch is optional and must be ordered separately.

If 3rd party condensate 5. overflow switches are installed, they should be wired in series between YO and Y to the outdoor unit.

Section 12. Electrical - High Voltage

▲

WARNING

12.1 High Voltage Power Supply

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.

12.2 High Voltage Disconnect Switch

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.

12.3 High Voltage Ground

Ground the outdoor unit per national, state, and local code requirements.

16 18-AC74D1-4

Section 13. Start Up

OFF

DON

CANCEL

OFF

60 MIN.

DON

CANCEL

13.1 System Start Up

STEP 1 - Ensure Sections 7 through 12 have

been completed.

STEP 2 - Set System Thermostat to OFF.

STEP 3 - Turn on disconnect(s) to apply power

to the indoor and outdoor units.

STEP 4 - Wait one (1) hour before starting the unit if compressor crankcase heater accessory is used and the Outdoor Ambient is below 70ºF.

STEP 5 - Set system thermostat to ON.

18-AC74D1-4 17

Section 14. System Charge Adjustment

LIFT

14.1 Temperature Measurements

STEP 1 - Check the outdoor temperatures.

Subcooling (in cooling mode) is the only recommended method of charging above 55º F ambient outdoor temperature.

For best results the indoor temperature should be kept between 70º F to 80º F.

Note: It is important to return in the spring or summer to accurately charge the system in the cooling mode when outdoor ambient temperature is above 55º F.

120º F

55º F

Outdoor Temp

80º F

70º F

Indoor Temp

14.2 Subcooling Charging in Cooling (Above 55º F Outdoor Temp.)

STEP 1 - Use the refrigerant line total length

and lift measurements from Section 5.3.

Total Line Length = __________ Ft.

Vertical Change (Lift) = __________ Ft.

18 18-AC74D1-4

Add 4º

Add 3º

Add 1º Add 2º

Add 1º 25 20 15 10

10 20 25 30 40 60

REFRIGERANT LINE LIFT (FT)

SUBCOOL CHARGING CHART CORRECTIONS TABLE

Use Design Subcooling

TOTAL REFRIGERANT LINE LENGTH (FT)

STEP 2 -

20 MIN.

60 Add 3º 50 Add 2º 40 Add 1º 30 25 20 15 10

10 20 25 30 40 60

Use Design Subcooling

REFRIGERANT LINE LIFT (FT)

SUBCOOL CHARGING CHART CORRECTIONS TABLE

TOTAL REFRIGERANT LINE LENGTH (FT)

Add 5º 50

Add 4º 40

Add 2º Add 3º

Add 2º 25 20 15 10

10 20 25 30 40 60

Use Design Subcooling

Add 1º

REFRIGERANT LINE LIFT (FT)

SUBCOOL CHARGING CHART CORRECTIONS TABLE

TOTAL REFRIGERANT LINE LENGTH (FT)

60 Add 5º 50 Add 4º 40 30 25 20 15 10

10 20 25 30 40 60

Add 1º

REFRIGERANT LINE LIFT (FT)

SUBCOOL CHARGING CHART CORRECTIONS TABLE

TOTAL REFRIGERANT LINE LENGTH (FT)

Add 3º

Add 2º

Use Design Subcooling

60 Add 6º 50 Add 5º 40 Add 3º Add 4º 30 Add 3º 25 Add 2º 20 15 10

10 20 25 30 40 60

REFRIGERANT LINE LIFT (FT)

SUBCOOL CHARGING CHART CORRECTIONS TABLE

TOTAL REFRIGERANT LINE LENGTH (FT)

Add 2º

Add 1º

Use Design Subcooling

60 Add 2º 50 Add 1º 40 30 25 20 15 10

10 20 25 30 40 60

REFRIGERANT LINE LIFT (FT)

TOTAL REFRIGERANT LINE LENGTH (FT)

SUBCOOL CHARGING CHART CORRECTIONS TABLE

Use Design Subcooling

60 Add 4º 50 Add 2º 40 30 25 20 15 10

10 20 25 30 40 60

TOTAL REFRIGERANT LINE LENGTH (FT)

REFRIGERANT LINE LIFT (FT)

SUBCOOL CHARGING CHART CORRECTIONS TABLE

Add 1º

Use Design Subcooling

Add 6º 50

Add 5º 40

Add 3º Add 4º 30 25 20 15 10

Use Design Subcooling Add 1º

10 20 25 30 40 60

REFRIGERANT LINE LIFT (FT)

SUBCOOL CHARGING CHART CORRECTIONS TABLE

TOTAL REFRIGERANT LINE LENGTH (FT)

Add 2º

Add 3º

Add 1º

Add 2º

Determine the ﬁnal subcooling value using total Line Length and Lift measured in STEP 1 and the charts below.

018 Units

030 Units

042 Units

024 Units

036 Units

048 Units

049 Units 060 Units

Design Subcooling Value = __________º F

(from nameplate or Service Facts)

Subcooling Correction = __________º F

STEP 3 - Stabilize the system by operating for a minimum of 20 minutes.

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

18-AC74D1-4 19

Final Subcooling Value = __________º F

STEP 4 - Measure the liquid line temperature

8910 11 12 13 14

179 182 185 188 191 195 198

195 198 201 204 208 211 215

211 215 218 222 225 229 232

229 232 236 240 243 247 251

247 251 255 259 263 267 271

267 271 275 279 283 287 291

287 291 296 300 304 309 313

309 313 318 322 327 331 336

331 336 341 346 351 355 360

355 360 365 370 376 381 386

381 386 391 396 402 407 413

407 413 418 424 429 435 441

435 441 446 452 458 464 470

464 470 476 482 488 495 501

495 501 507 514 520 527 533

R-410A REFRIGERANT CHARGING CHART

100

105

110

115

120

125

LIQUID

TEMP

(

FINAL SUBCOOLING (

LIQUID GAGE PRESSURE (PSI)

From Dwg. D154557P01 Rev. 3

107 °F

and pressure at the outdoor unit’s service valve.

Measured Liquid Line Temp = __________ º F

Liquid Gage Pressure = __________ PSI

Final Subcooling Value = __________ º F

STEP 5 - Use the ﬁnal subcooling value, refrigerant temperature and pressure from STEP 4, to determine the proper liquid gage pressure using Table 14.2.

Example: Assume a 12º F Final Subcooling

value and liquid temp of 90º F.

1. Locate 12º F Final Subcooling in Table 14.2.

2. Locate the Liquid Temperarature (90º F) in the left column.

3. The Liquid Gage Pressure should be approximately 327 PSI. (This is the shown as the intersection of the Final Subcooling column and the Liquid Temperature row.

Table 14.2

20 18-AC74D1-4

STEP 6 - Adjust refrigerant level to attain

20 MIN.

PRESSURE CURVES FOR 4TTX5049E1000A

4TXCD010CC3

Cooling @ 1400 CFM

LIQUID PRESSURE (PSIG)

OUTDOOR TEMPERATURE (Degree F)

125

130

135

140

145

150

155

160

165

170

220

270

320

370

420

470

520

40 50 60 70 80 90 100 110 120

(1)

(3)

(5)

(4)

(2)

INDOOR ENTERING WET BULB CURVES TOP TO BOTTOM 71, 67, 63 AND 59 DEG F.

proper gage pressure.

Add refrigerant if the Liquid Gage Pressure is lower than the chart value.

Connect gages to refrigerant bottle 1. and unit as illustrated.

Purge all hoses.2.

Open bottle.3.

Stop adding refrigerant when liquid 4. line temperature and Liquid Gage Pressure matches the charging chart Final Subcooling value.

Recover refrigerant if the Liquid Gage Pressure is higher than the chart value.

STEP 7 - Stabilize the system.

Wait 20 minutes for the system condi-1. tion to stabilize between adjustments.

Note: When the Liquid Line Temperature and Gage Pressure approximately match the chart, the system is properly charged.

Remove gages.2.

Replace service port caps to prevent 3. leaks. Tighten ﬁnger tight plus an additional 1/6 turn.

STEP 8 - Verify typical performance.

Refer to System Pressure Curves in the Service Facts to verify typical performance.

18-AC74D1-4 21

(Example only - see Service Facts)

STEP 9 - Record System Information for reference.

Record system pressures and temperatures after charging is complete.

Outdoor model number = _________________

Measured Outdoor Ambient = __________ º F

Measured Indoor Ambient = __________ º F

Measured Suction Line Temp = __________ º F

Liquid Gage Pressure = __________ PSI

Suction Gage Pressure = __________ PSI

Measured Liquid Line Temp = __________ º F

Section 15. Checkout Procedures and Troubleshooting

15.1 Operational And Checkout Procedures

Final phases of this installation are the unit Operational and Checkout Procedures. To obtain proper performance, all units must be operated and charge adjustments made.

Important: Perform a final unit inspection to be sure that factory tubing has not shifted during shipment. Adjust tubing if necessary so tubes do not rub against each other when the unit runs. Also be sure that wiring connections are tight and properly secured.

CHECKOUT PROCEDURE

After installation has been completed, it is recommended that the entire system be checked against the following list:

1. Leak check refrigerant lines. ........................................ [ ]

2. Properly insulate suction lines and ﬁttings. ................... [ ]

3. Properly secure and isolate all refrigerant lines. ........... [ ]

4. Seal passages through masonry. If mortar is used, prevent mortar from coming

into direct contact with copper tubing. .......................... [ ]

5. Verify that all electrical connections are tight. ............... [ ]

6. Observe outdoor fan during on cycle for clearance

and smooth operation. .................................................. [ ]

7. Be sure that indoor coil drain line drains freely. Pour water

into drain pan. ............................................................... [ ]

8. Be sure that supply registers and return grilles are open

and unobstructed. ......................................................... [ ]

9. Be sure that a return air ﬁlter is installed. ..................... [ ]

10. Be sure that the correct airﬂow setting is used.

(Indoor blower motor) ................................................... [ ]

11. Operate complete system in each mode to

ensure safe operation. .................................................. [ ]

22 18-AC74D1-4

SYSTEM FAULTS

REFRIGERA NT CIRCUIT

Head Pressure Too High

Head Pressure Too Low

Suction Pressure To o High

Suction Pressure To o Low

Liquid Refrig. Floodback (TXV/EEV)

Liquid Refrig. Floodback (Cap. Tube)

I.D. Coil Frosting

Compresso r Runs Inadequat e or No Cooling/H tg

ELECTRICA L

Compresso r & O.D. Fan Won’t Start

Compresso r Will Not Start But O.D. Fan Runs

O.D. Fa n Won’t Start

Compresso r Hums But Won’t Start

Compresso r Cycles on IOL

I.D. Blower Won’t Start

DEFROST

Unit Won’t Initiate Defrost

Defrost Te rminates on Time

Unit Icing Up

WHAT TO CHECK MODE

POWER SUPPLY

HIGH VO LTAGE WIRING

COMP RESSOR IOL

RUN CAPACITOR

START CAPACITOR

START RELAY

CONTACTOR CONTACTS

LOW VOLTAGE WIRING

CONT ROL TRANS FORMER

THER MOSTAT

CONTACTOR CO IL

LOW VOLTAGE FUSE

STUC K COMPRESSOR

INEF FICIEN T COMP.

REF. UNDERCH ARGE

REF. OVERCHARGE

EXCE SSIVE EVAP. LOAD

NONC ONDENS ABLES

RES. O.D. AI RFLOW

O.D. AIR RE CIRCUL ATION

TXV/ EEV STUCK OPEN

SUPE RHEAT

RES. I.D. AIR FLOW

REF. CIR. RESTRICTIONS

SOV LEAK ING

SOV COIL DEFECTIV E

CHEC K VA LVE LEAKI NG

DEFRO ST RELAY DEF.

DEFRO ST CONTRO L DEF.

PPP

P P

C - Cooling H - Heating P - Primary Causes S - Secondary Causes * - 3 Phase Only

15.2 Troubleshooting

18-AC74D1-4 23

6200 Troup Highway Tyler, TX 75707 www.trane.com

24 18-AC74D1-4

The manufacturer has a policy of continuous product and product data improvement and it reserves the right to change design and specifications without notice.

Representative-only illustrations included in this document.

Trane 4TTX5018A1000A, 4TTX5024A1000A, 4TTX5049E1000A, 4TTX5048A1000A, 4TTX5060A1000A Installer's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual