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AirComm Corporation Bell 412 Air Conditioner Instructions for Continued Airworthiness with Ground Cooling User Manual

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    							                                                                      AIR CONDITIONER SERVICE MANUAL 412AC-210M 
Revision 7  October 20, 2016 
1575 W. 124th Ave., Westminster CO 80234 Tel 303-440-4075 | Fax 303-440-6355 http://www.aircommcorp.com/ | [email protected] 
 
 
 
 
 
AIR COMM CORPORATION  
1575 W. 124th Avenue 
WESTMINSTER, CO. 80234 
PHONE: 303-440-4075 FAX: 303-440-6355 
[email protected] 
 
 
 
 
 
INSTRUCTIONS FOR CONTINUED AIRWORTHINESS 
BELL HELICOPTER 412 
AIR CONDITIONING SYSTEM 
 
 
 
 
 
 
BELL HELICOPTER 412 
AIR CONDITIONING SYSTEM 
WITH GROUND COOLING OPTION
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    							                                                                      AIR CONDITIONER SERVICE MANUAL 412AC-210M 
Revision 7                                                                                                              page ii 
 
 
 
 
 
 
 
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    							                                                                      AIR CONDITIONER SERVICE MANUAL 412AC-210M 
Revision 7                                                                                                              page iv 
 
 
 
 
 
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    							                                                                      AIR CONDITIONER SERVICE MANUAL 412AC-210M 
Revision 7                                                                                                              page v 
 
 
 
LIST OF EFFECTIVE PAGES 
 
LIST OF REVISIONS  
 Revision 0 (Original Issue) January 11, 2002 
 Revision 1  September, 24 2002 
 Revision 2  October 17, 2005 
 Revision 3  April 24, 2006 
 Revision 4  Aug.2, 2006 
 Revision 5  Aug.25, 2008 
 Revision 6 Feb.22, 2010 
 Revision 7 May 8, 2015 
 
 
 
LIST OF EFFECTIVE PAGES 
Title Page(s) Revision No. 
Record of Revisions iii 7 
List of Effective Pages v 7 
Table of Contents vii-ix 7 
Chapter 1 Introduction 1-6 7 
Chapter 2 Airworthiness Limitation Section 7-8 0 
Chapter 3 Inspections 9-10 7 
Chapter 4 Dimensions and Access 11 7 
Chapter 5 Placards and Markings 12-14 7 
Chapter 6 Servicing 15-21 7 
Chapter 7 Standard Practices 22-38 7 
Chapter 8 Troubleshooting 39-50 7 
Appendix A Ground Cooling  A-1- A-4 7 
Appendix B Weight and Balance                                                      B1                               7
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    							                                                                      AIR CONDITIONER SERVICE MANUAL 412AC-210M 
Revision 7                                                                                                              page vi 
 
 
 
 
 
 
 
 
 
 
 
 
 
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    							                                                                      AIR CONDITIONER SERVICE MANUAL 412AC-210M 
Revision 7                                                                                                              page 
vii 
 
TABLE OF CONTENTS 
Chapter Page 
CHAPTER 1 .................................................................................................................... 1 
INTRODUCTION ......................................................................................................... 1 
1. SCOPE ........................................................................................................... 1 
2. PURPOSE ...................................................................................................... 1 
3. ARRANGEMENT ............................................................................................ 1 
4. APPLICABILITY .............................................................................................. 1 
5. DEFINITIONS ................................................................................................. 1 
6. ABBREVIATIONS ........................................................................................... 2 
7. PRECAUTIONS .............................................................................................. 2 
8. UNITS OF MEASUREMENT .......................................................................... 2 
9. INFORMATION ESSENTIAL TO THE CONTINUED AIRWORTHINESS OF 
THE AIR CONDITIONER ............................................................................... 2 
10. REFERENCE DOCUMENTS .......................................................................... 2 
11. DISTRIBUTION............................................................................................... 3 
12. CHANGES TO THIS MANUAL ....................................................................... 3 
13. AIR CONDITIONER FEATURES .................................................................... 3 
14. DESCRIPTION OF THE AIR CONDITIONER AND ITS INSTALLATION ....... 5 
15. REFRIGERATION CYCLE ILLUSTRATION ................................................... 6 
CHAPTER 2 .................................................................................................................... 7 
AIRWORTHINESS LIMITATION SECTION ................................................................ 7 
1. AIRWORTHINESS LIMITATIONS .................................................................. 7 
CHAPTER 3 .................................................................................................................... 8 
INSPECTIONS ............................................................................................................ 8 
1. INSPECTION REQUIREMENTS .................................................................... 8 
2. COMPONENT OVERHAUL / REPLACEMENT SCHEDULE .......................... 8 
3. INSPECTION PROCEDURES ........................................................................ 9 
CHAPTER 4 .................................................................................................................. 12 
LOCATION AND ACCESS ........................................................................................ 12 
1. LOCATION OF AIR CONDITIONER FEATURES ......................................... 12 
2. LAYOUT OF AIR CONDITIONER SYSTEM ................................................. 12 
CHAPTER 5 .................................................................................................................. 13 
PLACARDS AND MARKINGS ................................................................................... 13
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    							                                                                      AIR CONDITIONER SERVICE MANUAL 412AC-210M 
Revision 7                                                                                                              page 
viii 
 
1. PLACARD AND MARKING INFORMATION ................................................. 13 
CHAPTER 6 .................................................................................................................. 14 
SERVICING ............................................................................................................... 14 
1. SAFETY PRECAUTIONS ............................................................................. 14 
2. SERVICING INFORMATION ........................................................................ 14 
3. LUBRICATION INFORMATION .................................................................... 17 
4. SYSTEM LEAK CHECK ............................................................................... 20 
5. SUGGESTED EQUIPMENT REQUIRED FOR SERVICING ........................ 21 
6. CONSUMABLE MATERIALS ....................................................................... 21 
7. SUGGESTED SPARES LIST ....................................................................... 22 
CHAPTER 7 .................................................................................................................. 23 
STANDARD PRACTICES INFORMATION ............................................................... 23 
1. FITTING TORQUING PROCEDURES AND TORQUE VALUES .................. 23 
2. REMOVAL & REPLACEMENT OF THE CONDENSER BLOWER MOTOR & 
FAN ASSEMBLY ......................................................................................... 24 
3. REMOVAL, REPLACEMENT & ADJUSTMENT OF THE COMPRESSOR 
DRIVE BELTS ............................................................................................. 27 
4. REMOVAL, INSTALLATION / REPLACEMENT OF AIR CONDITIONER 
COMPRESSOR ASSEMBLY ....................................................................... 34 
5. REMOVAL, INSTALLATION / REPLACEMENT OF THE AIR CONDITIONER 
COMPRESSOR DRIVE PULLEY FROM THE MAIN TRANSMISSION 
DRIVE SHAFT ............................................................................................. 35 
6. REMOVAL, INSTALLATION / REPLACEMENT OF THE FORWARD 
EVAPORATOR(S) ASSEMBLY ................................................................... 35 
7. REMOVAL, INSTALLATION / REPLACEMENT OF THE AFT EVAPORATOR 
ASSEMBLY ................................................................................................. 36 
8. REMOVAL, INSTALLATION / REPLACEMENT OF THE AIR CONDITIONER 
CONDENSER ASSEMBLY .......................................................................... 37 
9. REMOVAL, INSTALLATION / REPLACEMENT OF THE RECEIVER DRIER 
BOTTLE ....................................................................................................... 38 
10. REMOVAL, INSTALLATION / REPLACEMENT OF HI/LO PRESSURE 
SWITCH ....................................................................................................... 39 
11. REMOVAL, INSTALLATION / REPLACEMENT OF THE BY-PASS VALVE 
ASSEMBLY ................................................................................................. 40 
CHAPTER 8 .................................................................................................................. 41 
TROUBLESHOOTING ............................................................................................... 41 
1. SYSTEM TROUBLESHOOTING .................................................................. 41
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    							                                                                      AIR CONDITIONER SERVICE MANUAL 412AC-210M 
Revision 7                                                                                                              page ix 
 
APPENDIX A ................................................................................................................A-1 
Ground Cooling Unit .................................................................................................A-1 
Maintenance Instructions ..........................................................................................A-1 
1. REMOVAL, INSTALLATION / REPLACEMENT OF GROUND COOLING 
DRIVE MOTOR ..........................................................................................A-2 
2. REMOVAL, INSTALLATION / REPLACEMENT OF GROUND COOLING 
COMPRESSOR ..........................................................................................A-3 
3. REMOVAL, INSTALLATION / REPLACEMENT OF GROUND COOLING 
DRIVE BELT ...............................................................................................A-4 
APPENDIX B ................................................................................................................B-1 
WEIGHT AND BALANCE INFORMATION ...............................................................B-1
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    							                                                                      AIR CONDITIONER SERVICE MANUAL 412AC-210M 
Revision 7 Page x 
 
 
 
 
 
 
 
 
 
 
 
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