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

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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The following chart may be used to calculate the amount of oil to be added in case a 
component is being replaced with a new part.  
  
Component Oil Amount 
Compressor See Instructions  
Evaporator 1.0 oz. per evaporator 
Condenser 1.5 oz. 
Receiver Drier 1.5 oz. 
Hose - Vapor 1.0 oz. per 10 foot 
Hose – Liquid 1.0 oz. per 20 foot 
 
4. System Leak Check 
 
Identification  and  elimination  of  system  fitting  leaks  is  extremely...

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
Revision 6 Page 34 
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 Model 34700, or equivalent) 
 
Electronic Leak Detector (R134a compatible) 
(Example: Micro-Tech III,...

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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7. Suggested Spares List 
 
Item Part Number 
Blower Motor – Fwd. Evaporator  S-6164EC-3 
 
Blower Motor – Aft Evaporator  ES61142-1, -2 
 
Blower Assembly – Condenser (Baggage) EC130-7536-2 
 
Blower Assembly – Condenser (Tail Boom) S-7095EC-1 (Alt S-7095EC-2) 
 
Compressor Assembly (Flat Belt) S-3048EC-1 
 
Compressor Drive Belt (Flat) ES35350-3 
 
Compressor Assembly (Ploy V Belt) S-3036EC-1 
 
Compressor Drive Belt (Poly V) ES35130-3...

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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CHAPTER 7 
STANDARD PRACTICES AND INFORMATION 
1. General Information 
 
a. Refer  to Airbus Model  AS350  Maintenance  Manual  for  general  removal  and 
installation procedures associated with basic aircraft equipment and components. 
b. It may be  necessary  to  evacuate  (discharge)  refrigerant  from  the  system  to 
remove  or  replace certain  components.  Instructions  for  servicing  are  found  in 
Chapter 6. 
c. All  openings...

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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TORQ-LOK ® fittings (regardless of size): Hand tighten, then turn an additional 30 deg. 
 
 
INSERT O-RING FITTINGS    TORQ-LOK FITTINGS 
 
 
 
Once the system is charged, check each fitting with an electronic leak detector. 
(An electronic leak detector is the only reliable method of checking for refrigerant leaks) 
Once  the  fittings  have  been  checked  and  are  found  to  be  free  of  leaks,  torque  seal as 
appropriate. 
 
3....

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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4. Removal  and  Replacement of  Forward Evaporator Blower Motor 
Assembly (Figure 7-1 below) 
 
Removal 
 
a. Remove forward evaporator as per paragraph 2. 
b. Disconnect blower motor electrical connector. 
c. Remove attaching hardware securing blower motor assembly to evaporator 
enclosure. Remove blower motor assembly. 
d. Loosen retaining set screw and remove blower wheel from blower motor shaft. 
Retain blower wheel. 
NOTE 
It may be...

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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5. Removal and Replacement of Aft Evaporator Assembly 
(Figure 4-9 & 4-10) 
 
Removal 
 
a. Disconnect  refrigerant  plumbing  from evaporator  fittings  once  refrigerant  is 
evacuated. Always use a back-up wrench. 
b. Remove attaching  hardware  and  disconnect  duct  from  inlet  of  evaporator. 
Remove flex duct from outlet of evaporator by removing cable ties. 
c. Remove attaching hardware securing evaporator assembly to transmission...

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Figure 7-2 – Aft Evaporator Blower Motor, Pre-2015 kits with Molex connectors 
 
Replacement 
 
a. Install splices to retain Molex receptacle wiring and replacement motor wires. 
Cover with heat shrink. Ensure wiring polarity is observed as per Figure 7-2. 
b. Install retained blower wheel on new motor. Press the blower wheel onto the 
motor shaft until it stops against motor. Back blower wheel away to achieve a 
.030” – .040” clearance...

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d. Remove lower attaching hardware securing baffle plate assembly support tube to 
aircraft structure. 
e. While  supporting  condenser  assembly,  remove  attaching  hardware  securing 
condenser  hangar  brackets on  each  side  of  condenser to  existing  horizontal 
support. 
f. Remove condenser assembly. 
 
Replacement 
 
a. Position condenser and  secure  with  attaching  hardware  to hangar  brackets  on 
each side of condenser to...

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f. Remove both foam lined air block panels. 
g. Remove condenser assembly. 
 
 
Replacement 
 
a. Position condenser and air block panels and secure with attaching hardware. 
b. Replace  all  O-rings  before  connecting  refrigerant  plumbing  to  condenser  fittings 
using a back-up wrench. Torque refrigerant line connections per section 2 p.36. 
c. Install both condenser blower assemblies with support brackets. 
d. Install condenser...