AirComm Corporation Bell 429 Air Conditioning 429EC200M1Rev9 User Manual

AIR CONDITIONER SERVICE MANUAL 429EC-200M-1 
Revision 9 Page 3 
In  addition  to  the  revision  of  the  manual,  those  changes  categorized  as safety-of-flight 
shall  have  a  Service  Bulletin  issued to  the  operator  providing  the  necessary  information 
to comply with or to correct the safety-of-flight issue. 
 
Replacement or revised copies of this manual can be obtained by contacting: 
 
Air Comm Corporation Service Department 
1575 W. 124th Ave STE 210 
Westminster, CO.80234 
Phone No....

AIR CONDITIONER SERVICE MANUAL 429EC-200M-1 
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The  blower  motors feature  variable  fan  speed. This  feature  can  be  used  in  both  the  fan 
and air conditioner modes. 
 
The compressor is mounted to the surface of the main rotor gear box and is driven by a 
Poly  V-Belt  and  a  pulley  which  is  mounted  to  the  transmission  drive  quill.  Access  to  the 
compressor is provided by the transmission compartment access doors. 
 
Airflow  through  the  condenser  heat...

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The switch operating pressures are: 
 
Low Pressure Function: 
Cut-out at 28 ± 2.8psi (2.0 ± .2 Kg/cm²) 
Cut-in at 29 ± 4.3 psi (2.1 ± .3 Kg/cm²) 
 
High Pressure Function: 
Cut-out at 384 ± 30psig (28.0 ± 2.0 Kg/cm²) 
Cut-in at 298 ± 43psig (20.9 ± 2.0 Kg/cm²) 
 
14. Description of Vapor Cycle Air Conditioner and Installation 
 
This  section  contains  a  general  overview  of  a vapor-cycle  air  conditioning  system  and 
how  it...

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15. Refrigeration Cycle Illustration 
 
 
 
 
Figure 2:  Refrigeration Cycle Illustration 
(NOTE: This illustration is provided as a reference only and may not match actual installation) 
 
 
High pressure liquid 
Low pressure vapor 
Low pressure liquid 
High pressure vapor 
Compressor 
Condenser 
Aft Evaporator 
Receiver- 
Drier 
Bypass 
Valve 
Expansion 
Valves 
Fwd Evaporator  

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CHAPTER 2 
AIRWORTHINESS LIMITATION SECTION 
 
1. Airworthiness Limitations 
 
The  Airworthiness limitations  section  is  FAA  approved  and  specifies  inspections  and 
other  maintenance  required under  Sections  43.16  and  91.403  of  Federal  Aviation 
Regulations unless an alternative program has been FAA approved. 
 
No airworthiness limitations associated with this type design change. 
 
 
 
 
 
ACO Approval...

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CHAPTER 3 
INSPECTIONS AND OVERHAUL  
 
1. Inspection Requirements 
 
PERIODIC INSPECTIONS 
(Hours are aircraft time) 
 
NOTE 
The  429EC-250  provisions  kit  does  not  require periodic  inspection  until 
the  429EC-200, 429EC-202,  429EC-204,  or  429EC-206 Air  Conditioner 
kit has been installed.  
 
Item Annual 
Every 200 +/- 20 
Hours of 
Operation 
Special inspection instructions. 
(Paragraph) 
Fwd Evaporator 
Blower X  
 
Check for...

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2. Inspection Procedures 
 
NOTE 
Refer  to  Chapter 4,  Location  and  Access,  to  locate  all  aforementioned 
components for inspection. 
 
A. Inspection of the Fwd and Aft Evaporator Blower Motors: 
 
CAUTION 
Fans  are  designed  to  operate  with  the resistance  of  the  entire  ducting 
system.  Operation  of  the  evaporator  fans  with  any  part  of  the  distribution 
system removed may cause permanent damage to the fan motor....

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this area is critical for air conditioner operation. 
2) Disconnect  electrical  leads  from  the  binary  switch  and  install  a  jumper 
between the leads. 
3) Connect  28V  ground  power  to  the  aircraft  and  place  the  A/C  mode  switch  in 
the “A/C” position and verify: 
a. Condenser fan is activated and operating. This fan should pull air into 
the aircraft through the condenser assembly. 
b. Compressor  clutch  is  engaged  and...

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this inspection. 
 
1) Connect  28V  ground  power  to  the  aircraft  and  place  the  A/C  mode  switch  in 
the  “A/C”  position  and  verify that  the Compressor  clutch  is  engaged  and  the 
“AC COMP FAIL” message is not illuminated on the ADIU display. 
2) Place  air  conditioner  switch  to  the  OFF  position  and  verify  that  the 
Compressor  clutch  is  disengaged  and  the  “AC  COMP  FAIL”  message  is  not 
illuminated on...

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3. Component Overhaul / Replacement Schedule 
 
 
Part Number  Description  Recommended replacement  
S-6029EC-11 (LH) 
S-6029EC-12 (RH) 
 
Forward Evaporator 
Blower Motor Assy 
Every five years or 1500 hours. Acceptable to 
operate motor until failure as it poses no safety 
of flight risks. 
429EC-6302-11 (LH) 
429EC-6302-12 (RH) 
 
Aft Evaporator 
Blower Motor Assy 
Every five years or 1500 hours. Acceptable to 
operate motor until...