AirComm Corporation Bell 407 Air Conditioner Instructions for Continued Airworthiness User Manual

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
Revision 11  Page 34 
 
CAUTION 
When  reclaiming  refrigerant,  be  sure  to  note  any  oil  that  is  removed  from  the  system,  and 
replace  the  lost  oil  before  or  during  re-servicing.  Maintaining  a  proper  oil  and  refrigerant 
charge  is  critical  to  the  life  of  the  compressor  assembly. Excessive  system  oil  charge  will 
reduce cooling performance. 
 
5.  AMBIENT TEMPERATURE EFFECTS ON SERVICING 
 
Running  the  system  when...

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
Revision 11  Page 35 
Manually  rotate  the  compressor  shaft  clockwise  a  minimum  of  10  full  revolutions 
prior  to  running  of  compressor. A  socket  or  wrench  applied  to  the  shaft  nut  is 
recommended  method.  Always  rotate  clockwise  to  insure  against  loosening  the 
compressor shaft nut. 
Normal suction and discharge pressures are not expected under these conditions 
and  the  evaporators  may  be  cold enough  to  cause  the...

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
Revision 11  Page 36 
settings.  Insure  that  condenser  fan  is  operating  and  the  airflow direction  is 
correct. 
 Ambient Temperature less than 32 OF: 
There  is  no  safe  way  to  operate  the  air  conditioning  compressor  with  ambient 
temperatures  below  32 OF.  Much  of  the  system  can  be  tested  for  proper 
operation even though the compressor cannot be run. 
Charge the system by refrigerant weight only. 
Manually rotate the...

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
Revision 11  Page 37 
     flow. The solvent should enter from the expansion valve side and exit on the     
     discharge side until the solvent runs out clean. 
 
 6. Purge the condenser using air conditioner solvent (or equivalent i.e. Isopropyl alcohol, 
     Denatured alcohol). 
 
 7. Flush the bypass valve with air conditioner solvent. Do not use pressure to force   
     solvent through the valve. 
 
 8. Replace the receiver drier bottle. THIS IS...

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
Revision 11  Page 38 
 
Containers of DEC PAG or POE will absorb moisture if left open (hygroscopic). Keep 
containers tightly capped when not in use and keep all system components capped while 
servicing system. 
 
The  oil  charge  is  continuously  circulated  by  the  refrigerant  during  the  operation  of  the 
system.  A  quantity  of  oil  is  trapped  by  the  compressor,  as  well  as  by  other  parts  of  the 
system. 
 
The  following  chart...

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
Revision 11  Page 39 
 
NOTE 
Maintaining the correct amount of refrigerant and refrigerant oil in the system 
is critical for ensuring the long life of the compressor. 
 
The quantity of lubrication in the system is critical. If too little lubrication is in the 
system the compressor life may be reduced. No other component in the A/C 
system requires lubrication. Too much lubricant in the system will retard heat 
transfer in the evaporator and condenser...

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
Revision 11  Page 40 
 
NOTE 
Ensure that the O-ring is lubricated with refrigerant oil prior to its installation. 
 
A  small  amount  of  leakage  (approximately  one  ounce  per  year)  past  the 
compressor  shaft  seal  is  normal.  Most  leak  detectors  are  sensitive  enough  to 
show a leak of this magnitude. 
9. SUGGESTED EQUIPMENT FOR SERVICING 
 
A. Recovery / Recycling / Recharging Station 
Any model manufactured to comply with specification...

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
Revision 11  Page 41 
Compressor Drive Belt  7270 (7265 ALT) 
Receiver / Drier Bottle ES43034-1 
Binary Switch ES57178-1 
By-pass Valve ES26194-2 Kit S/N 1 thru 146 
By-pass Valve ES26194-25 Kit S/N 147 & 
subsequent 
Relay – Evaporator W389CX-8 
Relay – Condenser W389CX-13 
Relay – AC Control W389DCX-3 
Temperature Control Switch ES57170-3 
HSN O-rings; Insert type (Green) 
Size  
#6 O-ring ES44010-2 
#8 O-ring ES44010-3 
#10 O-ring ES44010-4 
HSN...

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
Revision 11  Page 42 
 
CHAPTER 7 
STANDARD PRACTICES INFORMATION 
 
1. FITTING TORQUING PROCEDURES AND TORQUE VALUES 
 
INSERT O-RING FITTINGS TORQ-LOK® FITTINGS 
 
 
Apply a thin coating of refrigerant oil to O-ring and Female side of fitting. 
Confirm there is no damage (nicks, dirt, etc.) on fittings. 
Slide  B-nut  back  away  from  the  end  of  the  tube  so  you  can  see  the  O-ring  as  you 
slide the fitting together. 
 
Be careful not to pinch...

AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
Revision 11  Page 43 
Once  the  fittings  have  been  checked  and  are  found  to  be  free  of  leaks,  torque  seal 
as appropriate. 
 
2. REMOVAL  &  REPLACEMENT  OF  CONDENSER  BLOWER  MOTOR &  FAN 
ASSEMBLY 
 
REMOVAL 
CAUTION 
It is recommended that the battery and external power be disconnected before 
starting work. 
 
A. Remove  the  (13)  thirteen  AN525-10R12  Screws  that  attach  the  S-
7062EC-1  Blower  assembly  to  the  lower  contour...