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

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-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 (Above).  Retain all hardware and disc.      
(Page 30). 
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...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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9. REMOVE AND REPLACE AFT EVAPORATOR (Figure 15) 
 
9.1 REMOVE AFT EVAPORATOR 
a. Remove plastic Hat Rack from aft end of cabin. 
b. Open baggage door and remove oval ceiling panel. 
c. Recover refrigerant using Robinair Model 34700 Recover/Recycling/Recharge Station 
or equivalent. 
d. Remove Suction and Pressure hoses from evaporator. 
e. Install caps and plugs over outlets and...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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10. REMOVE AND REPLACE AFT EVAPORATOR BLOWER (Figure 15) 
 
10.1 REMOVE AFT EVAPORATOR BLOWER 
a. Open baggage door and remove oval ceiling panel. 
b. Disconnect electrical connector on blower. 
c. Remove all three flex ducts from blower housing and adapter. 
d. Remove AN525-10R8 screws that support blower. 
e. Remove blower through access panel opening in baggage...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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11. REMOVE  AND  REPLACE CONDENSER  BLOWER  ASSEMBLY  (Figure 16 and 
Figure 17). 
 
11.1 REMOVE CONDENSER BLOWER ASSEMBLY 
a. Deactivate Air Conditioner circuit breaker on overhead circuit breaker panel. 
b. Working under aircraft beneath baggage compartment floor, remove 13ea AN525-
10R12 screws. 
c. Swing blower assembly down and disconnect Molex electrical connector. 
d. Remove 6 ea. AN525-10R8 screws MS21042L3 nuts...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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Figure 17:  Condenser Install - VIEW C-C 
 Figure 16:  Condenser Install VIEW LOOKING UP
AN525-10R8 ScrewsMS21042L3 NutsNAS1149F0332P Washers          6 PlsS-7060EC-1Blower Assy
FWD
SECTION VIEW OF LEFT SIDE
155.8STA
Lower contour ofbelly panel
AN525-10R12 Screws          13 Pls  

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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Figure 18:  Condenser Install - View E-E 
  

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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12.2 REPLACING CONDENSER HEAT EXCHANGER 
a. Replacing the heat exchanger is the reverse of removal. 
b. Insert heat exchanger through the blower assembly opening. 
c. Secure heat exchanger in place using original hardware. 
d. Replace the ES44012-2 and -3 O-Rings in hose fittings and install hoses per 
instructions. See section 12. 
e. Service with R134a refrigerant per CHAPTER 6. 
f. Reinstall condenser blower assembly...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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Figure 19:  Binary Switch – View F-F Binary Switch
Solenoid Bypass Valve
2X MS35275-240 Screw  
Drier/Receiver  

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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CHAPTER 8  
TROUBLESHOOTING 
1. System Troubleshooting 
 
Prior to troubleshooting a defective system, it is advisable to conduct a visual inspection 
for general condition and obvious signs of damage or failure. 
 
The following matrix lists the easiest checks and the most likely problems. 
 
Problem Cause Solution 
Premature Belt Failure a. Belt too loose 
b. Compressor misalign. 
c. System over charged 
a. Adjust belt...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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3. SYSTEM CHARGE 
 
See page 24 “Charging Procedures”. 
 
4. EXPANSION VALVE MALFUNCTION 
 
If the cooling loss is limited to only one evaporator, it is most likely a defective expansion 
valve. 
 
Loss of cooling in all evaporators (assuming that there were no problems identified during 
steps 1 or 2) could be caused by refrigerant flow blockage at the expansion valves. This 
blockage could be due to ice or dirt....