AirComm Corporation Cabin Air Conditioner A119 Instructions for Continued Airworthiness User Manual

AIR CONDITIONER SERVICE MANUAL A119-206M-1 
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CHAPTER 6 
SERVICING 
1. Safety Precautions 
 
CAUTION 
Refrigeration servicing should be performed by qualified personnel only. 
 
The  refrigerant  used in  the  air  conditioning  system  is  the  environmentally  safe  HFC 
R134a.  This  refrigerant  is  non-explosive,  non-flammable,  and  non-corrosive,  has 
practically  no  odor,  and  is  heavier  than  air.  Although  R134a  is  classified  as  a  safe 
refrigerant,  certain...

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hold a vacuum, the system has a fitting leak). It may be necessary to charge the system 
with one or two lbs. (.45 to .86 Kg.) of refrigerant and conduct a leak check survey using 
an electronic leak detector. 
 
CAUTION 
It  is  mandatory  that  the  system  be  leak  free  to  insure  trouble  free 
operation. Continuous operation of the system with insufficient charge will 
result in reduced compressor life. 
 
D. After  the  system  is...

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4.0 fl. oz. (118.8 ml.) of oil must be added at the time of the system installation. This oil 
should be added to the compressor discharge line prior to system charging. 
 
If oil is spilled during installation / maintenance, or is lost due to a leak in the system, it is 
necessary to approximate the amount of lost oil and add this amount to the system. 
 
The  oil  charge  is  continuously  circulated  by  the  refrigerant  during  the...

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NOTE 
Ensure  that  the  O-ring  is lubricated  with  refrigerant  oil  prior  to  its 
installation. 
 
A  small  amount  of  leakage  (approximately  one  ounce  per  year)  past  the  compressor 
shaft  seal  is  normal.  Most  leak  detectors  are  sensitive  enough  to  show  a  leak  of  this 
magnitude. 
 
5. Suggested Equipment for Servicing 
 
Recovery / Recycling / Recharging Station 
(Example: Snap-on Model ACT 3340, Robinair...

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7. Suggested Spares List 
 
Item Part Number  Effectivity 
Blower Motor – Fwd. Evaporator  ES61064-1 
 
Blower Motor – Aft Evaporator  ES61142-1 
 
Blower Assembly – Condenser A119-7008-1 Kit S/N 90 and subsequent 
 S-6501EC-3 (alt.) 
 
Compressor Assembly A119-3040-1 
 
Compressor Drive Belt  ES35119-2 
 
Receiver / Drier Bottle ES43030-5  
 
Binary Switch ES57178-1 
 
By-pass Valve ES26194-24 
 
Blower Assembly – Condenser (Standard)...

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CHAPTER 7 
STANDARD PRACTICES AND INFORMATION 
1. Fitting Torque Procedures and Values 
 
INSERT O-RING FITTINGS    Torq Lok FITTINGS 
 
 
 
Apply a thin coating of refrigerant oil to O-ring and Female side of fitting. 
Confirm there is no damage (nicks, dirt, etc.) on fittings. 
Slide  B-nut  back  away  from  the  end  of  the  tube so  you  can  see  the  O-ring  as  you  slide 
the fitting together. 
 
Be careful not to pinch O-ring...

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2. Removal and Replacement of Forward Evaporator Assembly  
(Figure 4-6) 
NOTE 
It will be necessary to evacuate (discharge) refrigerant from the system to 
remove or replace forward evaporator assembly. Instructions for servicing 
are found in Chapter 6. 
 
Removal 
 
a. Disconnect  refrigerant  plumbing  from evaporator  fittings once  refrigerant  is 
evacuated. Always  use  a  back-up  wrench. Cap  open  lines  to  prevent...

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4. Removal and Replacement of Aft Evaporator Assembly 
(Figure 4-7) 
NOTE 
It will be necessary to evacuate (discharge) refrigerant from the system to 
remove  or  replace aft evaporator  assembly.  Instructions  for  servicing  are 
found in Chapter 6. 
 
Removal 
 
a. Disconnect  refrigerant  plumbing  from evaporator  fittings  once  refrigerant  is 
evacuated. Always  use  a  back-up  wrench. Cap  open  lines  to  prevent...

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r. Connect air box assembly to blower outlet with attaching hardware. 
s. Connect flex duct from evaporator assembly and secure with cable ties. 
6. Removal and Replacement of Air Box Assembly  
(Figure 4-7) 
 
Removal 
 
a. Remove fresh air flex duct coming from fresh air box by removing cable ties at air 
box assembly inlet. 
b. Remove attaching hardware securing air box assembly inlet to aft evaporator 
blower assembly outlet. 
c. Remove...