AirComm Corporation Bell Air Conditioner206AB Installation Instructions TORQLOK PLUMBING

 
 
 
 
 
 
 
AIR COMM CORPORATION 
Boulder Municipal Airport 
3300 Airport Rd. 
Boulder, CO.  80301 
 
 
 
 
 
 
 
 
 
Document No. 206EC-250M 
 
 
 
 
 
 
 
 
 
MAINTENANCE INSTRUCTIONS 
BELL 206 A/B AIR CONDITIONER SYSTEM 
For System Installation 
206EC-201 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
REV E  8 September 2011  

  Page 1 of 21 
 206EC-250M 
 Rev E 
 
Revisions 
 
 Rev  Date   Description    Appl 
  
 A  03/07/05  
Pg. 5- added Fasco motor to list.      
            Revised Pgs 17 and 18 to include both the    
      ES61060-2 (Panasonic motor) and the  
      ES61142-1 motor (Fasco) 
 
 
B   09/22/05  Part number ES61060-2 blower motor replaced 
            With part number ES61064-1. Page 5 of 20. 
 
C    12/27/2007                  Part number ES57008-2 Replaced by...

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Table of Contents 
 
Introduction           3 
 
Reference Documents         3 
 
System Description and Operation       4 
 
Suggested Spares List         5 
 
Safety Procedures          6 
 
Tools, Equipment, and Consumables       7 
 
Lubrication           8 
 
Receiver Drier Bottle         8 
 
Refrigerant Fittings          8 
 
Belt Replacement and Adjustment        9 
 
Fitting Torquing Procedures        10 
 
System Leak Check          10 
 
System Charging...

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Introduction 
 
This document provides maintenance and service information for the ACC 206EC-201 
Cabin Air Conditioning system installation in the Bell 206 A/B Helicopter. 
 
The drawings which are listed below are considered to be part of this document. 
 
Reference Documents 
 
1.  Dwg 206EC-201 General Arrangement  - 206 A/B Air Conditioner system 
(Torq-Lok). 
 
2.  Dwg 206EC-304 Compressor Installation. 
 
3.  Dwg 206EC-548 Plumbing Installation. 
 
4.  Dwg...

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System Description and Operation 
 
The 206EC-201 system is a vapor cycle type Air Conditioner consisting of a 
Compressor, Condenser, Dryer, By-pass valve, and Multiple Evaporator assemblies. 
 
The Compressor is belt driven off of the tail rotor drive shaft, which is located in the 
engine compartment. 
 
The Condenser assembly is located below the baggage compartment floor. Cooling air 
is forced through the condenser by a 28V DC electric blower, and an...

  Page 5 of 21 
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Suggested Spares List 
 
 
  Item       Part Number 
 
 
Forward Evaporator Blower Motor    ES61064-10 
 
Aft Evaporator Blower Motor     ES61142-1 
 
Condenser Blower       ES73186-1 
 
Compressor        S-3008EC-6 
 
Compressor Drive Belt      7255 
 
Relay – Control       W389DCX-3 
 
Relay – Evaporator       W389CX-8 
 
Relay – Condenser       W389CX-13 
 
Receiver Drier Bottle      ES43034-1 
 
Binary Hi/Lo Pressure Switch     ES57178-1 
 
Circuit Breaker (1...

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Safety Precautions 
 
The refrigerant used in the air conditioning system is 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 precautions must be 
observed to protect parts involved and the person(s) working on the system. 
 
Liquid R134a at normal atmospheric pressure and temperature evaporates so quickly 
that it will freeze...

  Page 7 of 21 
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Tools, Equipment, and Consumables 
 
 
1.  Service Equipment: (Suggested) 
Recovery / Recycling / Recharging Station- 
 
Robinair Model 34700 or Equivalent 
Montpelier, OH 
1-800-822-5561 
 
2. Electronic Leak Detector: (Suggested) 
 
Micron – Tech III or Equivalent 
Model 209907 
Murray (NAPA) 
 
3. O-ring:  
 
CAUTION 
 
This system is charged with R134a 
Refrigerant and must be fitted with 
HSN O-rings (green in color) 
 
3. Lubricant: 
 
CAUTION 
 
This system...

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Lubrication 
 
The total air conditioning system oil charge is 7.5 + .5 oz. The compressors are factory 
charged with 3.5 oz. of oil. An additional 4 oz. of oil should be added to the discharge 
line prior to system charging. 
 
Care should be taken to avoid spilling any of the compressor oil charge during 
installation. If this should occur, drain the oil and recharge the 3.5 oz. 
 
The oil charge is continuously circulated by the refrigerant while the system is...

  Page 9 of 21 
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Belt Replacement and Adjustment 
 
To replace the compressor drive belt it is necessary to remove the tail rotor drive shaft 
segment between the engine transmission and the air conditioner drive pulley. (see 
BHT Service Manual). 
 
Proper belt tension in important to insure a long belt service life and to avoid excessive 
side load on the tailrotor driveshaft bearing. 
 
The proper belt tension is achieved as shown below:...