Home
>
AirComm Corporation
>
Air Conditioner
>
AirComm Corporation Cessna 414 421 Air Conditioning System Service Manual R134a
AirComm Corporation Cessna 414 421 Air Conditioning System Service Manual R134a
Have a look at the manual AirComm Corporation Cessna 414 421 Air Conditioning System Service Manual R134a online for free. It’s possible to download the document as PDF or print. UserManuals.tech offer 74 AirComm Corporation manuals and user’s guides for free. Share the user manual or guide on Facebook, Twitter or Google+.
TR-134 Revision J September 13, 2013 Page ii PREPARED ENGR REVISION RECORD CHECKED OTHER APPROVED ENGR REV CHECKED ENGR CHECKED OTHER APPROVED DATE RELEASED DATE DESCRIPTION OF CHANGES PREPARED ENGR REVISION RECORD CHECKED OTHER APPROVED ENGR REV CHECKED ENGR CHECKED OTHER APPROVED DATE RELEASED DATE DESCRIPTION OF CHANGES PREPARED ENGR REVISION RECORD CHECKED OTHER APPROVED ENGR REV CHECKED ENGR CHECKED OTHER APPROVED DATE RELEASED DATE DESCRIPTION OF CHANGES PREPARED ENGR REVISION RECORD CHECKED OTHER APPROVED ENGR REV CHECKED ENGR CHECKED OTHER APPROVED DATE RELEASED DATE DESCRIPTION OF CHANGES PREPARED ENGR REVISION RECORD CHECKED OTHER APPROVED ENGR REV CHECKED ENGR CHECKED OTHER APPROVED DATE RELEASED DATE DESCRIPTION OF CHANGES RECORD OF REVISIONS J. L. PHIPPS N/A MJR NC MJR N/A 9/1/1993 9/01/1993 Original Release – No Changes Reason: UNKNOWN N/A UNKNOWN A N/A N/A 9/15/1995 9/15/1995 Unknown Reason: UNKNOWN N/A UNKNOWN B N/A N/A 2/24/1998 2/24/1998 Unknown Reason: MML N/A HOA C N/A N/A 6/6/2000 6/6/2000 Pg 12-13. Added photos with description of installation of expansion valve. Pg ii. Replaced revision sheet. Pg iii. Updated effectivity list. Pg 19. Added replacement of expansion valve to item 1. JMS N/A HOA D N/A N/A 10/23/200 10/23/2000 Pg 20 Deleted sect. 2 letter E Modified sect.2 letter F now reads “check sight glass for presence….”
TR-134 Revision J September 13, 2013 Page iii PREPARED ENGR REVISION RECORD CHECKED OTHER APPROVED ENGR REV CHECKED ENGR CHECKED OTHER APPROVED DATE RELEASED DATE DESCRIPTION OF CHANGES PREPARED ENGR REVISION RECORD CHECKED OTHER APPROVED ENGR REV CHECKED ENGR CHECKED OTHER APPROVED DATE RELEASED DATE DESCRIPTION OF CHANGES PREPARED ENGR REVISION RECORD CHECKED OTHER APPROVED ENGR REV CHECKED ENGR CHECKED OTHER APPROVED DATE RELEASED DATE DESCRIPTION OF CHANGES PREPARED ENGR REVISION RECORD CHECKED OTHER APPROVED ENGR REV CHECKED ENGR CHECKED OTHER APPROVED DATE RELEASED DATE DESCRIPTION OF CHANGES BCS N/A MAK E N/A N/A 3/6/2002 3/6/2002 Revised doc., was Inc., now L.P., Revised doc., was Polyol Ester, now Polyolester, Revised pg. 10, was ES49000-3, now ES49000-1, Gave more detail steps to checking oil level after discharging system pg. 7 sec. 2 letter C step 3, Gave more detail steps to charging system pg. 8 sect 4 letter C step 3, Revised doc. page 2, was 28 vDC, now electrical Revised doc. on pg. 4, deleted first 28 vDC, second was vDC, now voltage, Deleted step 2C discharge procedure & renumber other steps, was Discharge the air conditioning system in accordance with the recovery units instructions. Added “per recovery unit’s instructions” to step 2 pg. 7 Revised step 2 page 7, was amount of oil, now is the, Added NOTE to step 3 of charging procedure pg 8, Revised pg 9, was peek, now peak; Revised pg 18, was below, now above, revised table on pg 19, was 28 VDC, now dc power supply, Updated all charging / discharging instructions to refer to Pg 7/ Pg 8. DRC N/A MAK F N/A N/A 7/29/2002 7/29/2002 Inserted section F to Pg. 11, changed letters to section headings thereafter. Matched titles to corresponding figures on Pg. 22. Added pg.iii to Record of Revisions. Changed pg. numbers to make up for new page. TLW N/A MAK G N/A N/A 8/21/2006 8/21/2006 Updated record of revisions tables to fit on one page. Revised inspection intervals and added instructions to inspect around existing regularly scheduled maintenance checks per ER2805. Added Flushing System to Refrigerant Servicing section. Added Compressor Maintenance Procedures to General Servicing section. Added Figure 2 and updated subsequest figure numbers. Deleted specific page number references. Updated page numbers. LEO N/A H N/A N/A 1/8/2010 1/28/2010 Rewrote Flushing Procedures. See revision G for previous procedure configuration. Edited step 12 WAS Discharge the system thru… NOW Recover the system thru… on pg. 11. Added O-ring and flare recommended torque values to chart on page 15. Continued on next page. Continued from previous page. Edited step 1 WAS greater than one (1) hour NOW greater than 10 minutes. On part H pg. 15. Compressor Oil Level Page 27; Deleted Steps 2 thru 8 and Step 2. for Previous steps see Rev. G Updated Table of Contents page numbers.
TR-134 Revision J September 13, 2013 Page v PROPRIETARY NOTICE The information contained in this document is the property of Air Comm Corporation and is proprietary and/or copyright material. This information and this document may not be used without the express authorization of Air Comm Corporation. Any unauthorized use or disclosure may be unlawful. The information contained in this document is subject to U.S. Export Control regulations. Each recipient of this document is responsible for ensuring that transfer or use of any information contained in this document complies with all relevant regulations.
TR-134 Revision J September 13, 2013 Page vi LIST OF EFFECTIVE PAGES SECTION PAGE DATE Title i September 13, 2013 Record of Revisions ii September 13, 2013 iii September 13, 2013 iv September 13, 2013 Proprietary Notice v September 13, 2013 List of Effective Pages vi September 13, 2013 Table of Contents vii September 13, 2013 Introduction 1 September 13, 2013 Air Conditioning System Description 2 September 13, 2013 3 September 13, 2013 4 September 13, 2013 5 September 13, 2013 Refrigerant Servicing 6 September 13, 2013 7 September 13, 2013 8 September 13, 2013 9 September 13, 2013 10 September 13, 2013 11 September 13, 2013 12 September 13, 2013 General Servicing 13 September 13, 2013 14 September 13, 2013 15 September 13, 2013 16 September 13, 2013 17 September 13, 2013 18 September 13, 2013 19 September 13, 2013 Troubleshooting 20 September 13, 2013 21 September 13, 2013 22 September 13, 2013 23 September 13, 2013 24 September 13, 2013 25 September 13, 2013 Checks 26 September 13, 2013 27 September 13, 2013 Appendix A-Title A-1 September 13, 2013 Charge Pressures A-2 September 13, 2013
TR-134 Revision J September 13, 2013 Page vii TABLE OF CONTENTS 1.0 INTRODUCTION .................................................................................................... 1 1.1 PURPOSE ........................................................................................................ 1 1.2 SCOPE ............................................................................................................. 1 1.3 ARRANGEMENT ............................................................................................. 1 1.4 GLOSSARY ...................................................................................................... 1 2.0 AIRCONDITIONING SYSTEM – SYSTEM DESCRIPTION ................................... 2 2.1 VAPOR CYCLE SYSTEM DESCRIPTION ....................................................... 2 2.2 ELECTRICAL DRIVEN COMPRESSOR SYSTEMS ........................................ 4 2.3 ENGINE DRIVEN COMPRESSOR SYSTEMS ................................................ 5 3.0 REFRIGERANT SERVICING ................................................................................. 6 3.1 GENERAL ........................................................................................................ 6 3.2 DISCHARGING SYSTEM ................................................................................ 7 3.3 EVACUATING SYSTEM .................................................................................. 8 3.4 CHARGING SYSTEM ...................................................................................... 9 3.5 FLUSHING SYSTEM ..................................................................................... 10 4.0 GENERAL SERVICING ....................................................................................... 13 4.1 GENERAL ...................................................................................................... 13 4.2 INSPECTION INTERVALS ............................................................................. 13 4.3 PLUMBING SYSTEM MAINTENANCE PROCEDURES ................................ 14 4.4 COIL CLEANING MAINTENANCE PROCEDURES ...................................... 16 4.5 EXPANSION VALVE REMOVAL AND INSTALLATION ................................ 17 4.6 COMPRESSOR MAINTENANCE PROCEDURES ........................................ 19 5.0 TROUBLESHOOTING ......................................................................................... 20 5.1 GENERAL ...................................................................................................... 20 5.2 AIR CONDITIONING SYSTEM DIAGNOSIS CHART .................................... 20 5.3 AIR CONDITIONING SYSTEM TROUBLESHOOTING ................................. 22 5.4 COMPRESSOR TROUBLESHOOTING......................................................... 25 6.0 CHECKS .............................................................................................................. 26 6.1 GENERAL ...................................................................................................... 26 6.2 REFRIGERANT LEVEL CHECK .................................................................... 26 6.3 REFRIGERANT SYSTEM LEAKAGE CHECK ............................................... 27 6.4 COMPRESSOR OIL LEVEL CHECK ............................................................. 27 APPENDIX A .............................................................................................................. A-1 A-1.0 CHARGE PRESSURES ............................................................................. A-2
TR-134 Revision J September 13, 2013 Page 1 1.0 INTRODUCTION 1.1 Purpose The purpose of this System Service Manual is to provide detailed instructions for the servicing, troubleshooting, checking and maintaining of the Air Comm Corporation, Inc. air conditioning systems using R134a refrigerant. It is intended to be used for all Air Comm Corporation air conditioning systems using R134a refrigerant that do not contain separate maintenance instructions. The System Service Manual supplements the Maintenance Manual supplied by Air Comm Corporation for your particular aircraft type. For the latest revision of this document, please visit www.aircommcorp.com. 1.2 Scope The scope of the System Service Manual provides the maintenance technician with detailed information covering: - Overall system level description and theory of operation. - Component level description and theory of operation. - System level checking and troubleshooting procedures. - Procedures for servicing the air conditioning system refrigerant. - The identification of special equipment to accomplish the specific tasks. 1.3 Arrangement This System Service Manual is arranged similar to Air Transport Association (ATA) Specification 100 and provides general servicing and maintenance instructions. 1.4 Glossary Nonstandard abbreviations and symbols used in the Maintenance Manual are described below. Abbreviations: A/C Air Conditioning A/R As Required Assy - Assembly Comm. Avail. - Commercially Available Evap - Evaporator Gnd - Ground GPU - Ground Power Unit
TR-134 Revision J September 13, 2013 Page 2 SW Switch VDC - Volts Direct Current 2.0 AIRCONDITIONING SYSTEM – SYSTEM DESCRIPTION 2.1 Vapor Cycle System Description The Air Comm Corporation, (ACC), vapor cycle air conditioning system uses liquid refrigerant R134a to cool the aircraft cabin. The major components for the R134a air conditioning system consist of a receiver/dryer, expansion valve, evaporator, compressor and condenser to cool the aircraft cabin. Figure 1 shows an operational schematic of the air conditioning system. The receiver/drier stores liquid R134a refrigerant under pressure. The drier portion of the assembly removes any traces of moisture that may have accumulated in the system. Liquid refrigerant flows from the receiver drier through the expansion valve where the refrigerant pressure is reduced, allowing it to spray into the evaporator. At the same time, a blower driven by an electric motor passes air over the evaporator. This air is cooled since heat is removed from the air by the evaporation of the refrigerant in the evaporator. The evaporator produces water due to condensation. This water drains overboard through a line attached to the evaporator cover. The refrigerant leaves the evaporator as a gas. This gas is pumped by the compressor, raising its pressure and temperature. This high temperature gas then flows to the condenser. Cooling air, driven by another electric blower motor, passes over the condenser, cooling and therefore condensing the refrigerant to a liquid. The liquid refrigerant then enters the receiver/drier, repeating the process. The plumbing which connects the compressor, condenser and the evaporators, consists of rubber based hoses with a nylon barrier. The fittings are permanently swaged onto the hoses. Some systems that have been converted from R12 to R134a refrigerant use Barb Lok hose fittings. Fittings are either o-ring type or use flared connections. Sealant is used on the fitting mating surfaces to prevent refrigerant leaks. Two R134a service valves are sized differently to avoid incorrect cross-connecting when gaining access to the plumbing for system recharging. The compressor on ACC air conditioning systems is driven either by an electrical motor, or by the engine. Listed below is a more detailed description of electric and engine driven compressor systems.
TR-134 Revision J September 13, 2013 Page 3 Figure 1. Air Conditioning Vapor Cycle System