Trane 4TWX8 Installer'S Manual Download Page 1

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18-BC91D1-6B-EN

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 informa-

tion pack upon completion of work.

Condensing Units

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 AHRI rated only with TXV/EEV indoor systems. Some of the benefits of installing approved matched indoor and out-

door split systems are maximum efficiency, optimum performance and the best overall system reliability.

4TWX8

Installer’s Guide

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

..................................................... 8

Section 7. Refrigerant Line Brazing

...................................................... 9

Section 8. Refrigerant Line Leak Check

............................................. 11

Section 9. Evacuation

.......................................................................... 12

Section 10. Service Valves

.................................................................. 12

Section 11. Electrical - Low Voltage

................................................... 13

Section 12. Electrical - High Voltage

.................................................. 15

Section 13. Start Up

.............................................................................. 16

Section 14. System Charge Adjustment

............................................. 17

Section 15. Checkout Procedures and Troubleshooting

.................. 23

Summary of Contents for 4TWX8

Page 1: ...y approved matched indoor and outdoor systems All of the manufacture s split systems are AHRI rated only with TXV EEV indoor systems Some of the benefits of installing approved matched indoor and out...

Page 2: ...replacement For specific handling concerns with R 410A and POE oil reference Retrofit Bulletins SS APG006 EN and APP APG011 EN or APP APG012 EN Extreme caution should be exercised when opening the Li...

Page 3: ...h of refriger ant lines from outdoor to indoor unit should NOT exceed 150 feet including lift 2 The maximum vertical change should not exceed 50 feet 3 Standard and alternate line sizes and service va...

Page 4: ...oof top depending on local weather This additional height will allow drainage of snow and ice melted during defrost cycle prior to its refreezing Ensure that drain holes in unit base pan are not obstr...

Page 5: ...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 h...

Page 6: ...8048A 7 8 3 8 7 8 3 8 150 50 4TWX8060A 1 1 8 3 8 7 8 3 8 80 25 ALTERNATE LINE SIZES Line Sizes Service Valve Connection Sizes Max Line Lift Lengths Vapor Line Liquid Line Vapor Line Connection Liquid...

Page 7: ...mine 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 The outdoor condensing units are factory ch...

Page 8: ...rom 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 wh...

Page 9: ...e or other appropriate method every 8 ft 8 Feet Maximum Isolation Through Wall DO NOT hang line sets from ductwork Sealant Insulation Vapor Line Wall Ductwork Isolator Line Set Section 7 Refrigerant L...

Page 10: ...orrect direction of refrigeration flow away from outdoor unit and toward evapo rator coil as illustrated Braze the filter drier to the Liquid Line Continue the dry nitrogen purge Do not remove the wet...

Page 11: ...2 Check for leaks by using a soapy solu tion or bubbles at each brazed location Remove nitrogren pressure and repair any leaks before continuing Section 8 Refrigerant Line Leak Check 8 1 Check For Le...

Page 12: ...ete blank off the vacuum pump and micron gauge and close the valves on the manifold gauge set 1 MIN Section 10 Service Valves 10 1 Open the Gas Service Valve 0350 Microns ON OFF CAP 1 4 TURN ONLY COUN...

Page 13: ...s 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 s s WARNING Section 11 El...

Page 14: ...er TAM7 DIP switches must be configured for HP 2 Stage 1 Compressor Note Refer to Indoor Unit Literature for proper configuration BK WH BLK BK WH BLK BK WH BLK BK WH BLK 11 3 Defrost Control Defrost c...

Page 15: ...ay be nec essary to work with live electrical components Failure to follow all electrical safety precau tions when exposed to live electrical compo nents could result in death or serious injury s s WA...

Page 16: ...s STEP 5 Set system thermostat to ON OFF DONE CANCEL ON OFF STEP 4 Wait one 1 hour before starting the unit if compressor crankcase heater acces sory is used and the Outdoor Ambient is below 70 F 60 M...

Page 17: ...ent tempera ture is above 55 F For best results the indoor temperature should be kept between 70 F to 80 F STEP 1 Use the refrigerant line total length and lift measurements from Section 5 3 Total Lin...

Page 18: ...NG CHART CORRECTIONS TABLE FOR LINE LENGTH AND RISE Add 2 REFRIGERANT LINE LIFT FT 4 Ton Heat Pump 50 1 40 1 30 25 Use Design Subcooling 15 10 0 20 30 40 50 60 70 80 90 100 110 120 130 140 150 REFRIGE...

Page 19: ...essure should be ap proximately 327 PSIG This is the shown as the intersection of the Final Subcooling column and the Liquid Temperature row Table 14 2 8 9 10 11 12 13 14 179 182 185 188 191 195 198 1...

Page 20: ...OR TEMPERATURE Degree F SUCTION PRESSURE PSIG OUTDOOR TEMPERATURE Degree F COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 65 DEG F TO CHECK COOLING PERFORMANCE SELECT THE PROPER IND...

Page 21: ...eating Only Measured Suction Line Temp __________ F Liquid Gage Pressure __________ PSIG Suction Gage Pressure __________ PSIG Calculating Charge Using the Weigh In Method 1 Measure in feet the distan...

Page 22: ...btained with the namplate 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 mo...

Page 23: ...gainst the following list 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 Importa...

Page 24: ...Unit Icing Up W H A T T O C H E C K M O D E P O W E R S U P P L Y H I G H V O L T A G E W I R I N G C O M P R E S S O R I O L R U N C A P A C I T O R S T A R T C A P A C I T O R S T A R T R E L A Y C...

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