AirComm Corporation Bell Air Conditioner 206L4 Installation Instructions with TORQLOK Plumbing

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-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-270M-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-270M-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 tube...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-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 psig...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-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-270M-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-270M-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 fittings...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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b. Ensure that all of the washers are installed correctly.  Torque all coupling nuts to 150-
180 In-lbs. 
c. Reinstall tension link to S-8001EC-12 rod and safety lock wire bolt. 
d. Rotate turn barrel to tighten drive belt. 
e. Proper belt tension in important to ensure a long belt service life and to avoid 
excessive side load on the tailrotor driveshaft bearing. 
f. For proper belt tension add a 3 lb. force at a point...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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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  

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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Figure 
13
:  
Compressor Drive Cou
pler 
- VIEW H
-H Torque 150-180 in-lbs
4X MS21042L5 Nut
S-3522EC-1 Drive PulleyRemove existing nut.Torque Drive Pulley 200-300 in-lbs.REMOVE S-3522EC-2 DRIVE RING PRIORTO TORQUING.
S-3522EC-2 Drive Ring4X S-3522EC-10 Bolt4X AN960-416L WasherLock wire - Single wiremethod per AC43.13-1A.Torque 60-80 in-lbs.
Oil Cooler Blower Shaft;P/N...