AirComm Corporation Airbus EC120 Cabin Air Conditioner Instructions for Continued Airworthiness User Manual

AIR CONDITIONER SERVICE MANUAL EC120-200M-1 
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5. Condenser Installation   
 
 
 
 
Figure 4-10  Condenser, Pre-Nov 2014 models 
   

AIR CONDITIONER SERVICE MANUAL EC120-200M-1 
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Figure 4-11  Condenser, looking inboard, Post-Nov 2014 models 
 
 
 
  
 
Figure 4-12  Condenser, Post-Nov 2014 models 
 
 
 
  

AIR CONDITIONER SERVICE MANUAL EC120-200M-1 
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6. Relay Panel, Single Evaporator Configuration 
                      
                             
 
                  
          
Figure 4-13 Relay Panel, Single Evaporator, Pre-Nov 2014 models shown, 
Post-Nov 2014 models similar 
  

AIR CONDITIONER SERVICE MANUAL EC120-200M-1 
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7. Relay Panel, Dual Evaporator Configuration 
 
 
 
 
 
Figure 4-14  Relay Panel, Dual Evaporator, Pre-Nov 2014 models shown, 
Post-Nov 2014 models similar 
  

AIR CONDITIONER SERVICE MANUAL EC120-200M-1 
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Figure 4-15 – Cockpit A/C Control Panel 
 
 
 
 
 
 
 
  

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CHAPTER 5 
PLACARDS AND MARKINGS 
1. Placard and Marking Information 
 
System Charging Instruction Placard 
 
 
 
SYSTEM CHARGING INSTRUCTIONS 
SYSTEM TO BE SERVICED BY QUALIFIED PERSONNEL 
 
R134a Refrigerant- Polyester oil-XH9 Desiccant 
System charge 2.4 lbs....

AIR CONDITIONER SERVICE MANUAL EC120-200M-1 
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CHAPTER 6 
SERVICING 
1. Safety Precautions 
 
CAUTION 
Refrigeration  servicing  should  be  performed  by  qualified  personnel  only. 
Check  all  local  and  federal  regulations  before  servicing  any  refrigerant 
system or storage device. 
 
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...

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3. Servicing Procedure 
 
A. Connect the servicing manifold to the servicing ports located on the forward R/H side of 
the  transmission  deck.  BLUE  for  low  pressure  or  “Suction”  and  RED  for  high  pressure 
or “Discharge.” 
 
B. After  the  quick  disconnect  fittings  have  been  attached  to  the  servicing  ports,  tighten  the 
knobs  on  the  back  of  the  fittings  to  engage  the  schrader  valves  located  inside  the...

AIR CONDITIONER SERVICE MANUAL EC120-200M-1 
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CAUTION 
Operating  the  air  conditioning  system  with  a  low  refrigerant  charge  may 
cause severe damage to the compressor assembly. 
 
F. If a charging station is not available, charge the A/C system as follows: 
1) After vacuum and leak check have been performed (Steps A through E) and the 
system  has  been  proven  to  be  “Leak  Free,”  charge  the  system  with  an  initial 
charge of 2.0 Lbs. 
 
2) Engage  the  compressor...

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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. See 
paragraph B. Component Replacement below. This oil, if required, should be added to the 
compressor discharge line prior to system charging. 
 
This system may be serviced with either Polyolester (POE) or Double End Capped 
Polyalkylene Glycol (DEC PAG)....