Carrier Transicold 69nt20-274 Operation manual

Models

69NT20-274

69NT40-441

69NT40-444

69NT40-454

T-246-10

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Carrier Transicold Division, Carrier Corporation, P.O. Box 4805, Syracuse, N.Y. 13221

SERVICE MANUAL

OPERATION AND

ãCarrier Corporation 1993 DPrinted in U. S. A. 0593

CONTAINER REFRIGERATION UNIT

MODELS

69NT20-274

69NT40-441

69NT40-444

69NT40-454

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TABLE OF CONTENTS

Section Page

1 DESCRIPTION 1-1........................................................

1.1 Introduction 1-1...........................................................

1.2 General Description 1-7....................................................

1.3 Refrigeration System Data 1-7...............................................

1.4 Electrical Data 1-8.........................................................

1.5 Voltage Switch and Power Transformer (Optional) 1-8...........................

1.6 Fresh Air Makeup Vent 1-9.................................................

1.7 Safety and Protective Devices 1-10............................................

1.8 Refrigeration Circuit 1-10....................................................

1.9 Water-Cooled Condenser (Optional) 1-11......................................

1.9.1 Water-Cooled Condenser with Water Pressure Switch 1-11...............

1.9.2 Water-Cooled Condenser with Condenser Fan Switch (CFS) 1-11..........

1.10 Remote Monitoring (Optional) 1-11..........................................

1.10.1 Remote Monitoring Plug 1-11........................................

1.10.2 Remote Monitoring Receptacle 1-12..................................

1.11 Suction Solenoid Valve 1-12..................................................

1.12 Frost Formation On Compressors 1-12.........................................

1.13 Computer Control --- Electronics Center 1-13...................................

1.13.1 Brief Description 1-13..............................................

1.13.2 General Layout of Control Center 1-14................................

1.13.3 Microprocessor Temperature Control 1-15.............................

1.13.4 Function and Data Codes 1-16.......................................

1.13.5 Alarms 1-19.......................................................

1.13.6 Pre-Trip Inspection 1-21.............................................

1.13.7 DataCORDER (Optional) 1-22......................................

1.13.8 Communications 1-23...............................................

1.13.9 Setting Function Codes Without AC Power (Optional) 1-24..............

1.14 USDA Battery Module (Optional) 1-25........................................

1.15 USDA Cold Treatment Procedure 1-25.........................................

1.16 Nitrogen Feed (Optional) 1-26................................................

1.17 Humidistat (Optional) 1-26..................................................

2OPERATION 2-1..........................................................

2.1 Pre-Trip Inspection (Before Starting) 2-1......................................

2.2 Starting and Stopping Instructions 2-1........................................

2.3 After Starting Inspection 2-1................................................

2.4 Unit Operation 2-2........................................................

2 . 4 . 1 C o o l i n g --- C o n t r o l l e r S e t B e l o w --- 1 0 _C(+14_F) 2-2...................

2.4.2 Controller Set Above ---10_C(+14_F) 2-2............................

2.4.3 Defrost 2-5.......................................................

3 TROUBLESHOOTING 3-1.................................................

3.1 Unit Will Not Start or Starts Then Stops 3-1...................................

3.2 Unit Runs But Has Insufficient Cooling 3-1....................................

3.3 Unit Operates Long or Continuously In Cooling 3-1............................

3.4 Unit Will Not Heat or Has Insufficient Heating 3-2.............................

3.5 Unit Will Not Terminate Heating 3-2.........................................

3.6 Unit Will Not Defrost Properly 3-2...........................................

3.7 Abnormal Pressures (Cooling) 3-3............................................

3.8 Abnormal Noise or Vibrations 3-3............................................

3.9 Temperature Controller Malfunction 3-3......................................

3.10 No Evaporator Air Flow or Restricted Air Flow 3-3.............................

3.11 Expansion Valve Malfunction 3-4.............................................

3.12 Water-Cooled Condenser or Water Pressure Switch Malfunction 3-4...............

3.13 Step-Up Power Transformer Malfunction 3-4...................................

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iiRevised 8-6-93

TABLE OF CONTENTS (CONTINUED)

Section Page

4SERVICE 4-1.............................................................

4.1 Removing the Refrigerant 4-1...............................................

4.2 Refrigerant Leak Checking 4-1..............................................

4.3 Evacuation and Dehydration 4-1.............................................

4.3.1 General 4-1......................................................

4.3.2 Preparation 4-1...................................................

4.3.3 Procedure 4-1....................................................

4.4 Adding or Checking the Refrigerant Charge 4-2................................

4.4.1 Checking the Refrigerant Charge 4-2.................................

4.4.2 Adding Refrigerant to System (Full Charge) 4-2........................

4.4.3 Adding Refrigerant to System (Partial Charge) 4-2.....................

4.5 Replacing the Compressor 4-3...............................................

4.6 Compressor Disassembly 4-4................................................

4.7 Compressor Reassembly 4-6.................................................

4.8 Checking the Compressor Oil Level 4-7.......................................

4.9 Checking or Replacing Moisture-Liquid Indicator 4-8...........................

4.10 Checking or Replacing the Filter-Drier 4-8....................................

4.11 Checking or Replacing High Pressure Switch 4-9................................

4.11.1 Replacing High Pressure Switch 4-9..................................

4.11.2 Checking High Pressure Switch 4-9...................................

4.12 Servicing Quench Solenoid Valve (QV) 4-9....................................

4.13 Replacing the Evaporator Coil and Heater Assembly 4-9.........................

4.14 Replacing the Evaporator Fan and Motor Assembly 4-10..........................

4.15 Servicing the Evaporator Coil Heaters 4-10.....................................

4.16 Condenser Coil 4-10........................................................

4.17 Condenser Fan and Motor Assembly 4-10......................................

4.18 Recording Thermometer (Partlow) 4-11........................................

4.19 Recording Thermometer (Saginomiya) 4-12.....................................

4.20 Rust Prevention and Maintenance of Painted Surfaces 4-13.......................

4.21 Servicing the Water-Cooled Condenser 4-13....................................

4.22 Checkout Procedure for Optional Power Transformer 4-15........................

4.23 Temperature Controller and Recorder Sensor Checkout Procedure 4-15.............

4.23.1 Replacing Temperature Sensor 4-15...................................

4.24 Servicing Suction Solenoid Valve (69NT40 ONLY) 4-16...........................

4.25 Servicing the Modulating Solenoid Valve 4-17...................................

4.26 Thermostatic Expansion Valve 4-18............................................

4.27 Evaporator Fan Motor Capacitors 4-19.........................................

4.28 Humidistat 4-19............................................................

4.29 Microprocessor Controller 4-20...............................................

5 ELECTRICAL WIRING SCHEMATIC AND DIAGRAMS 5-1....................

5.1 Introduction 5-1...........................................................

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iii

LIST OF ILLUSTRATIONS

Figure Page

1-1 Refrigeration Unit --- Front 1-3..............................................

1-2 Refrigeration Unit --- Rear (Panels Removed) 1-4...............................

1-3 Water-Cooled Condenser/Receiver Section 1-5.................................

1-4 Control Box 1-6...........................................................

1-5 Refrigeration Circuit 1-11....................................................

1-6 Frost Pattern on Compressors 1-12............................................

1-7 Microprocessor Control Panel 1-13............................................

1-8 USDA Battery Module 1-25..................................................

1-9 Controller Set Point Below ---10_C(+14_F) 1-27................................

1-10 Controller Set Point Above ---10_C(+14_F) 1-28................................

2-1 Cooling 2-3...............................................................

2-2 Heating Mode 2-4.........................................................

2-3 Defrost 2-5...............................................................

4-1 Vacuum Pump Connections 4-1..............................................

4-2 Compressor --- Model 06DR 4-3.............................................

4-3 Oil Pump 4-3..............................................................

4-4 Exploded View of Valve Plate 4-4............................................

4-5 Bottom Plate Removed 4-4..................................................

4-6 Vane Oil Pump and Bearing Head 4-5........................................

4-7 Gear Oil Pump and Bearing Head 4-5........................................

4-8 Motor End Cover 4-5.......................................................

4-9 Crankshaft Assembly 4-6....................................................

4-10 Removing Equalizing Tube and Lock Screw Assembly 4-6........................

4-11 Terminal Mounting Assembly 4-6.............................................

4-12 Suction Valve and Positioning Springs 4-7.....................................

4-13 Piston Rings 4-7...........................................................

4-14 Typical Setup for Testing High Pressure Switch 4-9..............................

4-15 Evaporator Fan Locating Dimension 4-10......................................

4-16 Partlow Recording Thermometer 4-11..........................................

4-17 Saginomiya Recording Thermometer 4-13......................................

4-18 Water-Cooled Condenser Cleaning 4-14........................................

4-19 Sensor 4-15................................................................

4-20 Sensor and Cable Assembly 4-15..............................................

4-21 Suction Solenoid Valves --- Sporlan 4-16........................................

4-22 Suction Solenoid Valves --- Alco 4-16...........................................

4-23 Modulating Solenoid Valve 4-17...............................................

4-24 Thermostatic Expansion Valve 4-18............................................

4-25 Humidistat 4-19............................................................

4-26 Microprocessor Control Box 4-21.............................................

5-1 Electrical Wiring Schematic (Models 69NT40-444 & 444-2) 5-2...................

5-2 Electrical Wiring Diagram (Models 69NT40-444 & 444-2) 5-4.....................

5-3 Electrical Wiring Schematic (Model 69NT40-444-1) 5-6..........................

5-4 Electrical Wiring Diagram (Model 69NT40-444-1) 5-8...........................

5-5 Electrical Wiring Schematic (Model 69NT40-444-3) 5-10..........................

5-6 Electrical Wiring Diagram (Model 69NT40-444-3) 5-12...........................

5-7 Electrical Wiring Schematic (Model 69NT40-444-4) 5-14..........................

5-8 Electrical Wiring Diagram (Model 69NT40-444-4) 5-16...........................

5-9 Electrical Wiring Schematic (Model 69NT40-454) 5-18...........................

5-10 Electrical Wiring Diagram (Model 69NT40-454) 5-20.............................

5-11 Electrical Wiring Schematic (Model 69NT20-274) 5-22...........................

5-12 Electrical Wiring Diagram (Model 69NT20-274) 5-24.............................

5-13 Electrical Wiring Schematic (Model 69NT20-274-1) 5-26..........................

5-14 Electrical Wiring Diagram (Model 69NT20-274-1) 5-28...........................

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ivRevised 8-6-93

LIST OF ILLUSTRATIONS (CONTINUED)

Figure Page

5-15. Electrical Wiring Schematic (Model 69NT40-444-6) 5-30..........................

5-16. Electrical Wiring Diagram (Model 69NT40-444-6) 5-32...........................

5-17. Electrical Wiring Schematic (Model 69NT40-454-1) 5-34..........................

5-18. Electrical Wiring Diagram (Model 69NT40-454-1) 5-36...........................

5-19. Electrical Wiring Schematic (Model 69NT40-444-9) 5-38..........................

5-20. Electrical Wiring Diagram (Model 69NT40-444-9) 5-40...........................

5-21. Electrical Wiring Schematic (Model 69NT40-444-11) 5-42.........................

5-22. Electrical Wiring Diagram (Model 69NT40-444-11) 5-44..........................

5-23. Electrical Wiring Schematic (Model 69NT40-444-10) 5-46.........................

5-24. Electrical Wiring Diagram (Model 69NT40-444-10) 5-48..........................

5-25. Electrical Wiring Schematic (Models 69NT40-444-7 & 444-8) 5-50..................

5-26. Electrical Wiring Diagram (Models 69NT40-444-7 & 444-8) 5-52...................

5-27. Electrical Wiring Schematic (Model 69NT40-444-12) 5-54.........................

5-28. Electrical Wiring Diagram (Model 69NT40-444-12) 5-56..........................

5-29. Electrical Wiring Schematic (Models 69NT40-454-2 & -454-3) 5-58.................

5-30. Electrical Wiring Diagram (Models 69NT40-454-2 & -454-3) 5-60..................

5-31. Electrical Wiring Schematic (Model 69NT20---274-2) 5-62.........................

5-32. Electrical Wiring Diagram (Model 69NT20---274-2) 5-64..........................

5-33. Electrical Wiring Schematic (Model 69NT40-444-13) 5-66.........................

5-34. Electrical Wiring Diagram (Model 69NT40-444-13) 5-68..........................

5-35. Electrical Wiring Schematic (Model 69NT40-444-14) 5-70.........................

5-36. Electrical Wiring Diagram (Model 69NT40-444-14) 5-72..........................

5-37. Electrical Wiring Schematic (Model 69NT40-444-15) 5-74.........................

5-38. Electrical Wiring Diagram (Model 69NT40-444-15) 5-76..........................

5-39. Electrical Wiring Schematic (Model 69NT40-444-16) 5-78.........................

5-40. Electrical Wiring Diagram (Model 69NT40-444-16) 5-80..........................

5-41. Electrical Wiring Schematic (Model 69NT40-444-17) 5-82.........................

5-42. Electrical Wiring Diagram (Model 69NT40-444-17) 5-84..........................

5-43. Electrical Wiring Schematic (Model 69NT20---274-3) 5-86.........................

5-44. Electrical Wiring Diagram (Model 69NT20---274-3) 5-88..........................

5-45. Electrical Wiring Schematic (Model 69NT40-444-18) 5-90.........................

5-46. Electrical Wiring Diagram (Model 69NT40-444-18) 5-92..........................

5-47. Electrical Wiring Schematic (Model 69NT40-444-19) 5-94.........................

5-48. Electrical Wiring Diagram (Model 69NT40-444-19) 5-96..........................

5-49. Electrical Wiring Schematic (Models 69NT40-441-21 & 69NT40-444-21) 5-98

........

5-50. Electrical Wiring Diagram (Models 69NT40-441-21 & 69NT40-444-21) 5-100

.........

5-51. Electrical Wiring Schematic

(Models 69NT40-444-20, -444-22, -444-23 & 69NT40-441-22, -23, -25) 5-102..........

5-52. Electrical Wiring Diagram

(Models 69NT40-444-20, -444-22, -444-23 & 69NT40-441-22, -23, -25) 5-104..........

5-53. Electrical Wiring Schematic (Model 69NT40-441-24) 5-106.........................

5-54. Electrical Wiring Diagram (Model 69NT40-441-24) 5-108..........................

LIST OF TABLES

Ta b l e Page

1-1 Model Chart 1-2...........................................................

1-2 Compressor Model Number Significance Chart 1-7.............................

1-3 Safety and Protective Devices 1-10............................................

1-4 Function Code Assignments 1-16..............................................

1-5 Alarm Indications 1-19......................................................

2-1 Electrical Control Positions --- Above ---10_C(+14_F) 2-6.......................

2-2 Electrical Control Positions --- Below ---10_C(+14_F) 2-6........................

4-1 Wear Limits for Compressors 4-22............................................

4-2 Compressor Torque Values 4-23...............................................

4-3 Partlow Bulb Temperature-Resistance Chart 4-24................................

4-4 Controller and Recorder Sensor Temperature-Resistance Chart 4-24...............

4-5 Recommended Bolt Torque Values 4-24........................................

4-6 Temperature-Pressure Chart --- R-12 4-25.......................................

4-7 Manual Override Operation of Microprocessor 4-26.............................

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1-1

SECTION 1

DESCRIPTION

1.1 INTRODUCTION

This manual contains Operating Data, Electrical

Data and Service Instructions for the refrigeration units

listed in Table 1-1. Also Table 1-1 charts some significant

differences between these models.

The unit, of lightweight aluminum frame

construction, is an all electric, one piece self-contained

cooling and heating refrigeration unit. The unit is

designed to fit in the front of a container and to serve as

the container front wall. Fork lift pockets are provided

for installation and removal of the unit.

TheunitiscompletewithachargeofR-12,

compressor lubricating oil, mode indicating lights,

temperature controller and is ready for operation upon

installation.

Some units are dual voltage units designed to

operate on 190/230 or 380/460 volts ac, 3 phase, 50-60

hertz power. (Refer to section 1.5.) Other units are

designed to operate on 380/460 volts ac, 3 phase 50/60

hertz power.

Operating control power is provided by a single

phase transformer which steps down the ac supply power

source to 24 volts ac, 1 phase control power.

The temperature controller is a microprocessor solid

state controller. Refer to section 1.13. Once the

temperature controller is set at a desired container

temperature, the unit will operate automatically to

maintain the desired temperature within very close

limits. The control system automatically selects cooling,

holding or heating as necessary to maintain the desired

temperature within the container.

WARNING

Beware of unannounced starting of the

evaporator and condenser fans. Do not open the

condenser fan grille before turning power OFF

and disconnecting power plug.

Some units are equipped with a Carrier Transicold

DataCORDER (Microprocessor recorder). Detailed

information on the DataCORDER will be found in

section 1.13.7. Some units are equipped with a Partlow

temperature recorder or a Saginomiya battery driven

recorder.

Later models have added features to make it easy to

convert to R-22. For example a low side pressure relief

valve and high side pressure relief valve opens at a higher

setting. Refer to Table 1-1 and electrical schematic to see

which models are easily converted to R-22. The electrical

schematic has an R-22 option for CDV, CHT, ILC, UV &

UVT these parts can be added to convert the unit to R-22.

Some units may have a TransFRESH controlled

atmosphere system added. Contact TransFRESH

Corporation, P.O. Box 1788, Salinas, CA 93902 for

information on their system.

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1-2

Revised 8-6-93

Ta b l e 1 - 1 . M o d e l C h a rt

MODELS UNIT WEIGHT

REFRIGER-

ANT

LB KG LB KG

69NT20-274 1200 544 9.3 4.2 X A --- --- --- X---

69NT20-274-1 1325 601 9.0 4.1 X --- --- X --- B ---

69NT40-444 1235 560 8.8 4.0 X A --- --- --- X ---

69NT40-444-1 1215 551 8.8 4.0 --- A --- --- X B ---

69NT40-444-2 1235 560 8.8 4.0 X A --- --- --- X ---

69NT40-444-3 1360 617 12.0 5.4 X --- X X --- B ---

69NT40-444-4 1230 558 12.0 5.4 --- --- X --- X B ---

69NT40-444-6 1200 544 12.0 5.4 --- --- X --- X B ---

69NT40-454 1195 542 12.0 5.4 X X --- --- --- B ---

UNITSTHATHAVEPROVISIONSTOCONVERTTOR-22 UNIUNI

69NT20-274-2 1175 533 9.0 4.1 X --- --- --- --- X ---

69NT20-274-3 1175 533 9.0 4.1 X --- X --- --- X C

69NT40-441-21 1265 574 12.3 5.6 --- --- X --- X B C

69NT40-441-22 1240 562 12.3 5.6 --- --- X --- X B C

69NT40-441-23 1265 574 12.3 5.6 --- --- X --- X B C

69NT40-441-24 1265 574 12.3 5.6 X --- X --- --- X C

69NT40-441-25 1240 562 12.3 5.6 --- A --- --- X B ---

69NT40-444-7 1330 603 12.0 5.4 X --- X X --- B ---

69NT40-444-8 1330 603 12.0 5.4 X --- X X --- B ---

69NT40-444-9 1210 549 12.0 5.4 X --- X --- --- X ---

69NT40-444-10 1210 549 8.8 4.0 --- A --- --- X B ---

69NT40-444-11 1210 549 12.0 5.4 X --- X --- --- X ---

69NT40-444-12 1210 549 12.0 5.4 X --- X --- --- X ---

69NT40-444-13 1210 549 12.0 5.4 X --- X --- --- X ---

69NT40-444-14 1280 580 8.5 3.8 X --- --- --- --- X ---

69NT40-444-15 1400 635 12.3 5.6 X --- X X --- B ---

69NT40-444-16 1210 549 12.0 5.4 X --- X --- --- X ---

69NT40-444-17 1380 626 12.3 5.6 X --- X X --- B ---

69NT40-444-18 1210 549 12.3 5.6 X --- X --- --- X C

69NT40-444-19 1210 549 12.3 5.6 X --- X --- --- X C

69NT40-444-20 1240 562 8.8 4.0 --- A --- --- X B ---

69NT40-444-21 1240 563 8.8 4.0 --- A --- --- X B ---

69NT40-444-22 1240 562 12.3 5.6 --- --- X --- X B ---

69NT40-444-23 1265 573 12.3 5.5 --- --- X --- X B C

69NT40-454-1 1166 529 12.0 5.4 --- X --- --- --- B ---

69NT40-454-2 1190 540 12.0 5.44 X X --- --- --- B ---

69NT40-454-3 1190 540 12.3 5.58 X X --- --- --- B---

A --- Provision for water-cooled condenser. If the water-cooled condenser is added, the refrigerant charge will change.

B --- The microprocessor (Rev 104 or greater software) includes code 32 for dehumidification, even though the

units do not have a humidistat.

C --- Provision for heat exchanger.

X --- Features that apply to model.

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