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

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
Revision H   Page 15 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 
4:  Layout of Air Conditioning
 
Dual Fwd Evaporators
 Electrical Instl
Evaporator Instl
Condenser Instl
Evaporator Instl
Air Distribution System
Compressor Instl
Condenser Instl
Air Outlets  

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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Figure 3-3 
Compressor  Assy Looking Aft 
Figure 
5:  Compressor Assy Looking Aft
 
 S-3003EC-1 Mount
S-3012EC-11 Support
S-3012EC-10 PlateMounting surfaceS-3008EC-1Compressor
S-3016EC-2Safety Stop
ExistingBearingSupport
S-3010EC-2
Collar
S-3016EC-1Belt Guard  

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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Figure 
6:  Detailed View of Compressor Pulley
 
 2X NAS1149F0563P Washer
2X NAS1149F0563P Washer
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 NAS1149F0432P WasherLock wire - Single...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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Figure 7:  View of 
Compressor Drive  
(7265 ALT) S-3010EC-2 Collar
S-3018EC-7 Link
7270 Belt  

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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Figure 
8:  Compressor Belt Alignment
 
(7265 ALT)
 ±2° Max
top edges of beltPulley SheavesRef points on
Driveshaft (ref)
7270 Belt
S-3522EC-1 Pulley
S-3008EC Compressor
offset is ±.08
Max Pulley sheave
(Drivetrain hardware not shown)
 Belt/Pulley Alignment Tolerance Detail   

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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Figure 
9:  Electrical system components
 28 VDC (existing)DC Power Panel
Hi/Lo Pressure Switch
Circuit Breaker 
S-2516EC-1 Relay Panel
Condenser Blower 
Comp Clutch 
Aft Evaporator (Ref)
Existing Wire Bundle
Air Conditioning Control SwitchesMS26574-1 Circuit BreakerExisting Bus
Existing Wire BundleEvaporator Forward  

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
Revision H   Page 21 
 
CHAPTER 5 
PLACARDS AND MARKINGS 
 
 
 
 
1. Placard S-2506-7 was used from October 1996 through mid -March 2001and is 
displayed next to the service ports in the baggage compartment. 
   

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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System Charge is 2.4 lb(1.1 kg) for Single Evap., 2.6 lb (1.2 kg) for Dual Evap. 
 
The above placard was used from mid -March 2001 through 2014. 
 
2. Placard S-2507EC-3/-4 is displayed next to the service ports in the baggage 
compartment. 
 
NOTE 
Newer systems do not include the “BOULDER, COLORADO” annotation on the System 
Charging Instructions Placard. 
 
NOTE 
Systems shipped in 2015 or later include both...

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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2. The above placards must be displayed adjacent to the appropriate circuit breaker 
or switch on the overhead circuit breaker panel in the cockpit. 
 
 HIGH
LOW
BLOWER
AFT
BLOWER
FWD
CONT
A/C
OFF
BLOWER
AIR CONDITIONING
 -28 Placard 
BLOWER
EVAP
 -27 Placard 
COND
BLOWER
 -26 Placard 
CLUTCH
COMP
 -25 Placard 
ACT
SCOOP
 -24 Placard   

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-270M-1 
 
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CHAPTER 6  
SERVICING 
 
1. CHARGING PROCEDURE 
 
NOTE 
This system should be serviced by QUALIFIED PERSONNEL only! 
 
Leak check system in accordance with procedures in CHAPTER 7. Evacuate system for a 
minimum of 30 minutes. Charge the system with 2.4 lbs (single fwd. Evaporator) or 2.6 lbs 
(Dual fwd. Evaporator) of R134a refrigerant. System pressures can vary depending on 
temperature / humidity relationships. The...