AirComm Corporation Bell 407 Air Conditioner Instructions for Continued Airworthiness User Manual

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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Figure 15:  Relay Panel & Circuit Breaker Detail View, 407EC-201 and 202 Systems  

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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Figure 16:  Relay Panel & Circuit Breaker Detail View, 407EC-203 Systems  
    

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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Figure 17:  Forward Evaporator Installation, 407EC-201 and 202 Installations, Dual 
forward evaporator installation shown.  Single forward evaporator installation may have 
evaporator mounted in RH or LH chin bubble.  

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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Figure 18:  Forward Evaporator Installation, 407EC-203 Installation  

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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Figure 19:  – Refrigerant Plumbing Dual Forward Evaporator installation shown  

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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CHAPTER 5 
PLACARDS AND MARKINGS 
 
1. PLACARD AND MARKING INFORMATION 
 
System Charging Instruction Placard S-2507EC-7/-8 
(Mounted adjacent to the air conditioner service ports on the R/H side of the 
baggage compartment, aft of the baggage compartment door). 
 
 
 
System Charge is 2.4 lb. (1.1 kg) for Single Evap., 2.6 lb. (1.2 kg) for Dual Evap. 
 
NOTE 
Newer systems do not include the “BOULDER, COLORADO” annotation on the...

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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Tail rotor Drive Pulley torque requirements label S-2501EC-1 
(Mounted on Aft fire wall of engine compartment above compressor) 
 
 
 
 
 
 
Flywheel Weight 407-340-002-101removal placard S-2501EC-2 
(Mounted on the Aft fire wall of engine compartment above compressor.) 
 
 
    

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CHAPTER 6 
SERVICING 
 
1. SAFETY PRECAUTIONS 
 
CAUTION 
Refrigeration servicing should be performed by qualified personnel only. 
 
J. The refrigerant  used  in  the  air  conditioning  system  is  the  environmentally 
safe HFC R134a. This refrigerant is non-explosive, non-flammable, non-corrosive, 
has  practically  no  odor,  and  is heavier than  air.  Although  R134a  is classified  as a 
safe  refrigerant,  certain...

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NOTE 
Due to the drop in atmospheric pressure with an increase in altitude, the normal 
vacuum reading will drop approximately 1” InHg (1 Kg/Cm) for each 1000 ft. 
 (304.8 m) of altitude. 
 
C. After  the  system  has  been  evacuated,  turn  off  both  manifold  valves,  and  then 
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...

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     the knobs on the back of the fittings to engage the Schrader valves located inside the        
     charging ports. If the knobs are not properly tightened, the Schrader valve inside of     
     the ports will not engage. 
 
 3. To ensure there is no air or moisture in the system, use the Manifold Gauges and 
     Vacuum Pump to pull the system down on a vacuum continuously for a minimum of 1     
      hour. To perform this,...