AirComm Corporation Bell Air Conditioner206L4 Installation Instructions Insert ORing Dual Fwd Evaps

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 
 
 
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Liquid R134a at normal atmospheric pressure and temperature evaporates so 
quickly that it will freeze anything that it contacts. Care must be taken to prevent 
any liquid refrigerant from coming in contact with the skin, especially the eyes. 
R134a is readily absorbed by most types of oil, therefore it is recommended a 
bottle of clean mineral oil and weak solution of boric acid be kept nearby when 
servicing the...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 
 
 
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D. Lubricant 
CAUTION 
This system may be serviced with either Polyolester (POE) or Double End Capped 
Polyalkylene Glycol (DEC PAG).  Polyalkylene Glycol is preferred due to its superior 
lubricating properties and improved compressor service life.  There are several types of 
PAG available. Only the “Double End Capped” type is permissible in Air Comm 
Corporation air conditioning systems.  Double End Capped PAG oil is...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 
 
 
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E. Refrigerant:   DuPont HFC R134a 
 
SYSTEM REFRIGERANT & OIL CHARGE 
System Description Refrigerant Charge Oil Charge 
206EC-208  Air  Conditioner 
system, Single FWD evap 
2.4 lbs. 1.1 kg. 8.0 fl oz. 238 ml. 
206EC-208  Air  Conditioner 
system, Dual FWD evap 
2.6 lbs. 1.2 kg. 8.0 fl oz. 238 ml.  

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 
 
 
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Chapter 7  
STANDARD PRACTICES 
 
1. O-RING TYPE FITTINGS AND TORQUE VALUES 
Shown below are the TORQ LOK® type fittings on the left and the insert O ring type 
fittings on the right.  These two types of fittings are used throughout the refrigerant 
plumbing system.  When connecting either type of fittings always lubricate the O-Rings 
with refrigerant oil before installing. Slide B-Nut back from end of tubing and inspect...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 
 
 
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2. GENERAL PRECAUTIONS - SYSTEM LEAK CHECK 
Identification and elimination of any system fitting leaks is extremely important to ensure a 
trouble free system.  A system that contains a partial charge can be leak tested and 
recharged without evacuating the system.  The system can be pressurized with nitrogen 
or R134a refrigerant.  A system which has been evacuated should be filled to a pressure 
of at least 50 psig of...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 
 
 
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Figure 10 General Arrangement Air 
Conditioning System   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Air Conditioning System Component 
General Arrangement 
Figure 8-1 HH
GG
FF
E
D
E
D
Section B-B
Section A-A
CC
BB
AA   

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 
 
 
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5. REMOVE AND REPLACE COMPRESSOR (Figure 11) 
 
5.1 REMOVE COMPRESSOR  
a. Recover refrigerant using Robinair Model 34700 or equivalent. 
Recover/Recycling/Recharge Station. 
b. Remove Suction and Pressure hoses from Compressor. 
c. Install caps and plugs over outlets and hoses.   
d. Remove safety wire from belt S-3018EC-7 Link turnbarrel.  
e. Remove inboard AN4 bolt from S-3018EC-7 Link. 
f. Remove AN6H34A bolt and...

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5.2 REPLACE COMPRESSOR 
a. Install S-3001EC-12 rod, AN4H3A bolt and NAS1149F0432P washer. 
b. Install belt S-3018EC-7 Link on end of S-3001EC-12 rod and safety both bolts. 
c. Install inboard bolt through S-3018EC-7 Link and collar. 
d. Replace drive belt with new belt. 
e. Adjust belt tension per Figure 2. 
f. Safety all drilled head bolts and the S-3018EC-7 Link. 
g. Replace the ES44010-2 and -4 O-Rings in hose fittings...

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6.2 REPLACE COMPRESSOR DRIVE BELT 
g. Install new drive belt over drive pulley and compressor pulley then reinstall tail rotor drive 
shaft. 
h. Ensure that all of the washers are installed correctly.  Torque all coupling nuts to 150-180 
In-lbs. 
i. Reinstall tension link to S-8001EC-12 rod and safety lock wire bolt. 
j. Rotate turn barrel to tighten drive belt. 
k. Proper belt tension in important to ensure a long belt...

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Figure 12:  Compressor Drive Belt. VIEW H-H 
(7265 ALT)  AN960-516 Washer
Torque 150-180 in-lbs
NAS6605-8 Bolt
MS21042L5 Nut
214-040-611-3 Washer
S-3526EC-2 Washer
 AN960-516 Washer
S-3522EC-1Drive Pulley
7270 Belt