AirComm Corporation Airbus AS350 Air Conditioner Instructions for Continued Airworthiness User Manual

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
Revision 6 Page 23 
 
Figure 4-15 – Plumbing Installation, Side Mount Condenser 
(Aft Cabin Bulkhead – View Looking Forward) 
* 
ES26194
-24 
Bypass Valve
 
*For systems supplied after March 2014 the Tee fitting shown is replaced by
 
ES40634
-7 Tee fitting and ES49035
-1 pressure relief valve
  

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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Figure 4-16 – Air Conditioning System Plumbing – Side Mounted Condenser  

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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Figure 4-17 – Plumbing Installation, Tail Boom Condenser 
 
 
 
 
Figure 4-18 – Drier Bottle Installation, Tail Boom Condenser 
 
Looking forward at cabin aft bulkhead 
AS350-5004-T22 #8 TUBE ASSY 
AS350-5004-T23 #6 TUBE ASSY 
AS350-5004-T20 #8 TUBE ASSY 
AS350-5004-T21 #8 TUBE ASSY 
A119-5020-3 TEE FITTING 
ES26194-24 BYPASS VALVE 
AS350-5004-T7 #8 TUBE ASSY FROM COMPRESSOR 
Looking up below right 
side equipment bay...

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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Figure 4-19 - Air Conditioning System Plumbing –Tail Boom Condenser 
  

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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Figure 4-20 – A/C Relay Panel Location 
(RH Baggage Compartment Forward Bulkhead – View Looking Fwd) 
 
  
AS350-8420—1 / -2 
A/C Relay Panel  

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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CHAPTER 5 
PLACARDS AND MARKINGS 
1. Placard and Marking Information 
 
 
Charging Instructions Placard 
(Transmission Deck Adjacent to Aft Evaporator) 
 
NOTE 
Newer placards do not include the “BOULDER, 
COLORADO” and may include the use of Ultra PAG oil. 
 
 
 
 
Belt Alignment Caution Placard 
(Transmission Deck Adjacent to Compressor) 
 
2.4 1.1  

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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Rear Baggage Compartment Placard (Located inside of the aft cargo door.) 
If equipped with the tail boom mounted condenser assembly 
 
 
 
 
 
Storage Bin Placard (Located inside right side of storage bin.) 
If equipped with the tail boom mounted condenser assembly and the optional storage bin 
located below the condenser 
   

AIR CONDITIONER SERVICE MANUAL AS350-200M-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...

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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C. After the system has been evacuated, turn off both manifold valves and turn the vacuum 
pump off. Allow a minimum of one hour to check for vacuum leaks (if the system will not 
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...

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3. Lubrication Information 
 
The total system oil charge is 8.0 fl oz. (238 ml.) of Double End Capped Polyalkylene Glycol 
(DEC PAG). The oil is initially contained within the compressor as shipped from the factory 
so no additional oil is required when installing a new system.  
 
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...