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AirComm Corporation Bell 412 Air Conditioner Instructions for Continued Airworthiness User Manual
AirComm Corporation Bell 412 Air Conditioner Instructions for Continued Airworthiness User Manual
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AIR CONDITIONER SERVICE MANUAL 412AC-208M Revision 14 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
AIR CONDITIONER SERVICE MANUAL 412AC-208M Revision 14 Page ii THIS PAGE INTENTIONALLY LEFT BLANK
AIR CONDITIONER SERVICE MANUAL 412AC-208M
Revision 14 Page iii
RECORD OF REVISIONS
Rev Date Description of Change Approval
1 3/11/1998 Corrected page numbering; Revised list of effective
pages
N/A
Prepared by GP
2 5/14/2001 Added inspection requirements for speed reducer
bearing, Pg. 2-1
N/A
Prepared by RR
3 7/20/2001
Revised compressor drive illustration 6-1 to show
retainer plate Pg. 6-7, Added 412-808 elect;
Schematic Pgs. 7-9, 7-10, & 7-11; Added description
of changes to record of revisions
N/A
Prepared by GP
4 5/8/2003 Removed receiver drier bottle p/n 804-297 and
replaced with ES43032-1, Pg. 5-5
N/A
Prepared by GP
5 8/26/2003
Revised inspection requirement for speed reducer
bearing Pg. 2-1;
Added replacement requirement for speed reducer
bearing Pg. 2-1;
Added speed reducer bearing part number to
Suggested Spares List Pg. 5-5; Revised belt
tensioning requirement 61 lbs was 55 lbs,
Pg. 6-6; Revised illustration 6-1 to include belt guard,
Pg. 6-7;
Added Pgs. 6-7A, 6-7B, & 6-7C
N/A
Prepared by KJ
6 10/17/2005 Added 7345 Belt to Suggested Spares List, Pg. 5-5 &
compressor drive illustration 6-1, Pg. 6-7.
N/A
Prepared by GP
7 4/24/2006
Added 412AC-607 Fwd Evaporator Instl and 412AC-
818 Elect Schematic to Reference Documents, Pg. 0-
3;
Added 412AC-818 to Troubleshooting Pg. iv;
Added Pg. 7-12 & 7-13 412AC-818 Elect Schematic;
Added Model 412CF to Applicability, Chapter 0, Pg. 0-
1
N/A
Prepared by RL & GP
8 8/2/2006 Added compressor safety strap, Pg. 6-7;
Added Safety strap label, Pg. 4-1
N/A
Prepared by GP
9 1/11/2008
Replaced obsolete ES57008-2 with ES57010-1, Pgs.
5-5 & 7-7;
Updated operating data, Pg. 0-5
N/A
Prepared by MS
10 6/24/2008 Deleted belt P/N 7320 and 7350; added belt P/N 7305
and 7355
N/A
Prepared by GP
11 8/20/2008 Deleted P/N ES61060-2; replaced with P/N ES61064-
10, Pg. 5-5
N/A
Prepared by MS
12 2/1/2010
Corrected Binary Switch operating pressures, Pg. 0-5;
Corrected speed reducer bearing part number to
ES33100-3, Pg. 2-1; Corrected various part numbers
to Suggested Spares List, Pg. 5-5
N/A
Prepared by RL
13 8/19/2013 Minor ICA change to clarify refrigerant oil
requirements, and dip stick increments, allow for use
of aft coupling bolts on the Fwd main driveshaft
coupling to install balance weights, and updated
formatting and typographical errors (revision bars were
omitted for formatting and typographical or spelling
and grammar updates). Clarified Installation
instruction after removal of an item. Updated plumbing
and electrical schematics. Added weight and balance
information.
Prepared By:
Karen G. Blecha (KGB) 8/21/2013
Date
ACC Approval:
MJK 9-3-2013
Signature Date
FAA Acceptance (Major Change):
N/A – Meets Minor Change Agreement
MR-100-134 8/21/2013
Signature Date
AIR CONDITIONER SERVICE MANUAL 412AC-208M Revision 14 Page v LIST OF EFFECTIVE PAGES LIST OF REVISIONS Revision 0 ..................................................................................................May 13 1998 Revision 1 ..................................................................................................Nov 3 1998 Revision 2 ..................................................................................................May 14 2001 Revision 3 ..................................................................................................July 20 2001 Revision 4 ..................................................................................................May 8 2003 Revision 5 ..................................................................................................Aug 26 2003 Revision 6 ..................................................................................................Oct 17 2005 Revision 7 ..................................................................................................April 24 2006 Revision 8 ..................................................................................................Aug.2 2006 Revision 9 ..................................................................................................Jan 11 2008 Revision 10 ................................................................................................Jun 24 2008 Revision 11 ................................................................................................Aug 20 2008 Revision 12 ................................................................................................Feb 1 2010 Revision 13 ................................................................................................Aug 19 2013 Revision 14…………………………………………………………………………May 8, 2015 LIST OF EFFECTIVE PAGES Title Page(s) Revision No. Record of Revisions I 14 List of Effective Pages ii 14 Table of Contents iii-x 14 Chapter 1 Introduction 1-6 14 Chapter 2 Airworthiness Limitation Section 7-8 14 Chapter 3 Inspections 9-10 14 Chapter 4 Dimensions and Access 11-12 14 Chapter 5 Placards and Markings 13-14 14 Chapter 6 Servicing 15-21 14 Chapter 7 Standard Practices 22-38 14 Chapter 8 Troubleshooting 39-44 14 Appendix A Weight and Balance Information 45 14
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AIR CONDITIONER SERVICE MANUAL 412AC-208M Revision 14 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 SERVICE 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 AND OVERHAULS ............................................................................. 8 1. INSPECTION REQUIREMENTS .................................................................... 8 2. COMPONENT OVERHAUL / REPLACEMENT SCHEDULE .......................... 8 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 1. PLACARD AND MARKING INFORMATION ................................................. 13
AIR CONDITIONER SERVICE MANUAL 412AC-208M Revision 14 Page viii 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
AIR CONDITIONER SERVICE MANUAL 412AC-208M Revision 14 Page ix CHAPTER 8 .................................................................................................................. 41 TROUBLESHOOTING ............................................................................................... 41 1. SYSTEM TROUBLESHOOTING .................................................................. 41 APPENDIX A ................................................................................................................. 47 Weight and Balance Information ................................................................................ 47
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