AirComm Corporation Cabin Air Conditioner A119 Instructions for Continued Airworthiness User Manual

AIR CONDITIONER SERVICE MANUAL A119-206M-1 
Revision 12 Page 35 
8. Removal and Replacement of Condenser Vane Axial Blower Assembly 
(Figure 4-8) 
 
Removal 
 
a. Remove screws that attach condenser blower assembly to the lower contour of 
the belly panel. This will allow the blower assembly to pivot on the forward hinged 
support plate. 
b. Disconnect vane axial blower assembly Molex connector. 
c. Remove inlet duct and attaching hardware. 
d. Remove bolts on each side of blower mount plates and remove...

AIR CONDITIONER SERVICE MANUAL A119-206M-1 
Revision 12 Page 36 
b. Apply 2.8 lbs (1.27 Kg) of force using a tension tester midpoint of belt span 
between the compressor pulley and the drive pulley. 
c. Deviation should be .188 inch. Adjust belt tensioning link as required. 
d. Safety wire compressor belt tensioning link and jam nuts. 
 
 
 
 
 
 
10. Removal and Replacement of Compressor Assembly 
(Figure 4-3) 
NOTE 
It will be necessary to evacuate (discharge) refrigerant from the system to 
remove  or...

AIR CONDITIONER SERVICE MANUAL A119-206M-1 
Revision 12 Page 37 
c. Replace all O-rings before connecting refrigerant plumbing to compressor fittings 
using  a  back-up  wrench. Torque  refrigerant  line connections  to  40–45  inch-lbs 
(4.6-5.1 Nm) for the #8 fitting and 50–55 in-lbs (5.7-6.3 Nm) for the #10 fitting. 
d. Install nut  and  bolt  from  upper compressor  mount  for  belt  tensioning  link 
assembly and safety strap. Torque bolt to 110-130 in-lbs. 
e. Perform belt adjustment according to...

AIR CONDITIONER SERVICE MANUAL A119-206M-1 
Revision 12 Page 38 
Removal 
 
a. Disconnect refrigerant plumbing from bypass valve once refrigerant is evacuated. 
Always use a back-up wrench. Cap open lines to prevent contamination. 
b. Disconnect electrical wiring from bypass valve solenoid. 
c. Remove  attaching  hardware  to  mounting  brackets securing  bypass  valve. 
Remove bypass valve. 
 
Replacement 
 
a. Install bypass valve and secure to mounting brackets with attaching hardware. 
b. Replace...

AIR CONDITIONER SERVICE MANUAL A119-206M-1 
Revision 12 Page 39 
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 Probable Cause Corrective Action 
System not Cooling 
 
(Evaporator blowers still operating) 
System is low or empty of 
refrigerant...

AIR CONDITIONER SERVICE MANUAL A119-206M-1 
Revision 12 Page 40 
Problem Probable Cause Corrective Action 
System not cooling 
(Evaporator blowers not operating) 
Forward and aft evaporator blower 
motor(s) 
Check for power to the motor(s), 
and for the free movement of the 
blower wheel; if the motor shaft 
does not turn smoothly the motor 
must be replaced 
Loss of cooling limited to one 
evaporator 
Expansion valve malfunction If cooling is lost in only one of the 
evaporators, and the blowers...

AIR CONDITIONER SERVICE MANUAL A119-206M-1 
Revision 12 Page 41 
Figure 8-1 – Electrical Schematic (IDS Equipped Aircraft) 
 
 
 
*1 
*2 
*2= 12 ga. wire with S-6501EC-3 condenser blowers, 14 ga. wire with A119-7008-1 condenser blowers 
*1= 20A circuit breaker with S-6501EC-3 condenser blowers, 15A circuit breaker with A119-7008-1 condenser blowers   

AIR CONDITIONER SERVICE MANUAL A119-206M-1 
Revision 12 Page 42 
Figure 8-2 – Electrical Schematic (Non IDS Equipped Aircraft) 
 
 
*1 
*2 
*1= 20A circuit breaker with S-6501EC-3 condenser blowers, 15A circuit breaker with A119-7008-1 condenser blowers  
*2= 12 ga. wire with S-6501EC-3 condenser blowers, 14 ga. wire with A119-7008-1 condenser blowers  

AIR CONDITIONER SERVICE MANUAL A119-206M-1 
Revision 12 Page 43 
APPENDIX A 
WEIGHT AND BALANCE INFORMATION 
 
Agusta A119 Air Conditioner System: 
Ref. Dwg. A119-212 
 
Weight Breakdown (Single Forward Evaporator Blower) 
English Units 
Item Wt. 
(lbs) 
X-Arm 
(in) 
X-M 
(in-lb) 
Y-Arm 
(in) 
Y-M 
(in-lb) 
 
Total 
A119-212 
Air conditioning 
System 
99.67 134.9 13,444.9 -1.88 -187.6 
 
Metric Units  
Item Wt. 
(kg) 
X-Arm 
(mm) 
X-M 
(kg-mm) 
Y-Arm 
(mm) 
Y-M 
(kg-mm) 
 
Total 
A119-212 
Air...