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

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 
 
 
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Figure 
13
:  Compressor Drive 
Coupler Details
 – 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...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 
 
 
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7. REMOVE AND REPLACE COMPRESSOR DRIVE PULLEY (Figure 13) 
 
7.1 REMOVE COMPRESSOR DRIVE PULLEY 
a. Remove forward T/R driveshaft per section 6. 
b. Remove drive flange from oil cooler blower shaft. 
c. Remove safety wire and 4ea. S-3522EC-10 Bolts from drive ring. 
d. Remove drive ring.   
e. Unscrew drive pulley from oil cooler blower shaft. 
 
7.2 REPLACE COMPRESSOR DRIVE PULLEY 
a. Apply light coat of spline grease to...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-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-208M-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-208M-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-208M-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-208M-1 
 
 
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Figure 18:  Condenser Install - View E-E 
  

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 
 
 
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13. REMOVE AND REPLACE BYPASS VALVE (Figure 19) 
 
13.1 REMOVE BYPASS VALVE 
a. Remove aft panel in baggage compartment. 
b. Recover refrigerant using Robinair Model 34700 Recover/Recycling/Recharge Station or 
equivalent. 
c. Remove 2X MS35275-240 Screws from valve mount bracket. 
d. Cut wires at splices.  
e. Disconnect tubing from valve and remove valve from aircraft. 
 
13.2 REPLACE BYPASS VALVE 
a. Install valve in...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-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-208M-1 
 
 
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Chapter 8  
TROUBLESHOOTING 
1. System Troubleshooting 
 
Prior to troubleshooting a defective system, it is advisable conduct a visual inspection for general 
condition. Inspect condenser fins for damage, comb out bent fins, and check circuit breakers in 
baggage compartment. 
 
The following matrix lists the easiest checks, and most likely problem sources, first. 
 
Problem Cause Solution 
Premature Belt 
Failure 
a. Belt...