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AirComm Corporation Bell Air Conditioner206L4 Installation Instructions Insert ORing Dual Fwd Evaps
AirComm Corporation Bell Air Conditioner206L4 Installation Instructions Insert ORing Dual Fwd Evaps
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INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 Revision D 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-208M-1 Revision D Page 16 Figure 3-3 Compressor Assy Looking Aft 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-208M-1 Revision D Page 17 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 wiremethod per AC43.13-1A.Torque 60-80 in-lbs. Oil Cooler Blower Shaft;P/N 206-040-320-105 S-2500EC-31 O-RingAlt: MS29561-221 Apply light coat splinegrease to pulley and shaft. 2X 214-040-611-3 Washer 2X 214-040-611-3 Washer 2X S-3526EC-2 Washer 2X NAS6605-8 Bolt 2X S-3526EC-2 Washer 2X NAS1149F0563P Washer 2X NAS6605-8 BoltTail RotorDrive Shaft
INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 Revision D Page 18 Figure 7: View of compressor drive (7265 ALT) S-3010EC-2 Collar 7270 Belt Tail Rotor Drive Shaft (View Looking Down)
INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 Revision D Page 19 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-208M-1 Revision D Page 20 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-208M-1 Revision D 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-208M-1 Revision D Page 22 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 “Polyester oil” and “Ultra PAG oil” in the annotation on the System Charging Instructions Placard.
INSTRUCTIONS FOR CONTINUED AIRWORTHINESS - 206EC-208M-1 Revision D Page 23 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-208M-1 Revision D Page 24 Chapter 6 SERVICING 1. CHARGING PROCEDURE NOTE This system should be serviced by QUALIFIED PERSONNEL only! Leak check system in accordance with procedures on page 29. 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 most effective method of charging a system is to add an initial refrigerant charge of 2.0 lbs then continue to add refrigerant until the evaporator outlet air temperature and system suction pressure reaches a minimum and subsequently starts to increase. When adding the refrigerant after the initial charge it should be done in increments of .25 lbs, and a minimum of 10 minutes allowed to elapse before adding each additional .25 lbs of refrigerant charge. This allows the system to stabilize and reach its maximum cooling potential for the given charge. The optimum charge occurs when evaporator outlet air temperatures are at their lowest. Any additional refrigerant will cause the outlet air temperature to increase and system performance to be degraded. Charge the system to the point of noticing the first temperature increase, then reduce charge back to the optimum point where outlet air temperatures were lowest. 2. REFRIGERANT PRESSURE System pressures will very due to temperature and humidity relationships. NOTE SYSTEM OVERCHARGING, OR OPERATION OF SYSTEM DURING LOW AMBIENT TEMPERATURE CONDITIONS MAY RESULT IN TAILROTOR PEDAL FEEDBACK! 3. SAFETY PRECAUTIONS The refrigerant used in the air conditioning system is HFC R134a. This refrigerant is non-explosive, non-flammable, non-corrosive, has practically no odor, and is heavier than air. Although R134a is classified as a safe refrigerant, certain precautions must be observed to protect parts involved and the person(s) working on the system.