AirComm Corporation Bell Air Conditioner206L L1 L3 Single Dual evap L4 Single evap only Installation Instructions Insert ORing

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-202M-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-202M-1 
 
 
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D. Lubricant 
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 available...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-202M-1 
 
 
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CHAPTER 7  
STANDARD PRACTICES 
 
1. O-RING TYPE FITTINGS 
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 
formed end of...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-202M-1 
 
 
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2. 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 refrigerant or 150...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-202M-1 
 
 
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Figure 10:  Air Conditioning System Component 
General Arrangement HH
GG
FF
E
D
E
D
Section B-B
Section A-A
CC
BB
AA  

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-202M-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...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-202M-1 
 
 
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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...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-202M-1 
 
 
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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...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-202M-1 
 
 
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Figure 
12
:  
Compressor Drive Belt 
- VIEW H
-H 
(7265 ALT)
 Max Pulley Shesveoffset is ±.08
206-040-320 Shaft Assy Ref
S-3520EC-1 Drive PulleyS-3016EC-1 Belt Guard7270 BeltAft Firewall (Ref)
4X AN174-6A Bolt
32721-1 Disc Assy
Existing
3X 206-040-340-329-1 
Washer  
206-040-325 Shaft Assy  
Ref
AN320-6 Nut
AN380-3-3 Cotter KeyTorque...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-202M-1 
 
 
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7. REMOVE AND REPLACE COMPRESSOR DRIVE PULLEY (Figure 12) 
 
7.1 REMOVE COMPRESSOR DRIVE PULLEY 
a Remove compressor drive belt per section 6.  Retain all hardware and disc (See page 
31). 
b Remove cotter pin from fwd end of S-3014EC-1 bolt assembly and remove AN320-6 
nut. 
c Remove drive pulley from 206-040-320 shaft assembly. 
 
7.2 REPLACE COMPRESSOR DRIVE PULLEY 
a Apply anti seize lubricant to inside spline of...