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

							AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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11. REMOVAL,  INSTALLATION/  REPLACEMENT  OF  BY-PASS  VALVE 
ASSEMBLY 
 
REMOVAL 
A. Remove  the  aft  baggage  compartment  closeout  panel,  to  access  refrigerant 
plumbing. 
 
B. It will be necessary to evacuate (discharge) the refrigerant from the system to 
remove  or  replace  the  by-pass  valve.  Instructions  for  servicing  of  the  system 
are found in CHAPTER 6 Servicing. 
 
CAUTION 
Refrigerant servicing should be performed by qualified personnel only. 
 
C. Remove safety wire and mounting screws that attaches support bracket to the 
valve coil assembly. 
 
D. Disconnect the electrical connector to the by-pass valve assembly. 
 
E. Disconnect  the  refrigerant  lines  from  both  sides  of  the  by-pass  valve 
assembly. 
 
CAUTION 
Always use a backup wrench when removing or installing refrigerant line 
fittings. 
 
F. Remove the by-pass valve. 
 
INSTALLATION / REPLACEMENT 
A. Place by-pass valve in appropriate location. 
 
B. Reconnect the refrigerant lines to both sides of the bypass valve assembly  
 and replace all O-rings. (see page 40 for installation data / fitting assembly 
 procedures). 
 
C. Reconnect the electrical connectors to the by-pass valve assembly. 
 
D. Install the safety wire and mounting screws that attach the valve coil 
 assembly to the support bracket. 
 
E. Recharge the refrigerant per the servicing instructions on Page 31, steps A 
 through G. 
 
CAUTION 
Refrigerant servicing should be performed by qualified personnel only! 
  
						

							AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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F. Reinstall the aft baggage compartment closeout panel. 
 
12. REMOVAL,  INSTALLATION  /  REPLACEMENT  OF  AFT  EVAPORATOR 
BLOWER ASSEMBLY 
 
 REMOVAL 
CAUTION 
 It is recommended that the battery and external power be disconnected before 
starting work. 
 
A. Remove the access panel on the roof of the baggage compartment. 
 
B. Remove  the  (4)  four  AN525-10R6  Screws,  and  (4)  four  AN960-10L  Washers 
 that attach the blower motor to the Aft Evaporator housing. 
 
C. Remove CAT ducting from the inlet, and outlet adapters on the Aft Evaporator 
 Blower Assembly. 
 
D. Disconnect electrical connection to the Aft Evaporator Blower Assembly. 
 
E. Remove Blower Assembly from aircraft. 
 
 INSTALLATION / REPLACEMENT 
A. Place blower assembly in appropriate location. 
 
B. Reconnect electrical connections to the Aft Evaporator Assembly. 
 
C. Secure the CAT ducting to the inlet, and outlet adapters using (2) two CTW41 
 Tywraps, and (1) one 78F523 Tywrap. 
 
D. Install four MS27039-1-6 screws and four NAS 1149F0332P washers that 
 attach the blower motor to the top of the baggage compartment ceiling. 
 
E. Install the access panel on the roof of the baggage compartment. 
 
13. REMOVAL,  INSTALLATION  /  REPLACEMENT  OF  THE  CONDENSER 
SCOOP ASSEMBLY. 
 
 REMOVAL 
CAUTION 
  It is recommended that the battery and external power be disconnected 
before starting work. 
 
A. Remove the (13) AN525-10R12 Screws that attach the S-7062EC-1 
Condenser Scoop Assembly to the lower contour of the belly panel. This will  
						

							AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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allow the Condenser Scoop Assembly to pivot on the forward hinged support 
plate. 
 
CAUTION 
Be sure to support this assembly when removing the attaching hardware to 
prevent damage to the Condenser Scoop Assembly, or the aircraft. 
 
B. Remove the (6) AN525-10R6 Screws that attach the forward hinge support 
plate to the aircraft belly panel. 
 
C. Disconnect the Molex Connector that attaches the power wires from the 
Condenser Scoop Assembly to the aircraft wiring, and remove the S-7062EC-
1 Condenser Scoop Assembly from the aircraft. 
 
 INSTALLATION / REPLACEMENT 
A. Place the condenser scoop assembly in the appropriate location and support 
it until completely installed. 
 
B. Connect Molex connector that attaches the power wires from the condenser 
scoop assembly to the aircraft wiring. 
 
C. Install the 6 AN525-10R6 screws that attach the forward hinge support plate 
to the aircraft belly panel. 
 
D. Install the 13 AN525-10R12 screws that attach the S-7060EC-2 condenser 
scoop assembly to the lower contour of the belly panel. 
 
E.  Reconnect the battery and/or external power. 
 
NOTE 
Perform a maintenance operational check of the Condenser Scoop Assembly on 
completion of the installation, to ensure that there is no rubbing or binding of the Scoop 
Door. 
 
The Condenser Scoop Door is rigged at the factory with a .20 to .40  + .10 inch gap 
between the Scoop Door and the Scoop Plate assemblies with the Scoop Door in the 
full up position. 
 
CAUTION 
Do not attempt to disassemble or readjust the Scoop Door, as altering the rigging may 
damage the Scoop Door Bellcrank, or Scoop Door Actuator. 
  
						

							AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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Figure 20:  Compressor Drive Pulley installation – looking inboard from aircraft 
left 
Driveshaft Installation: Aircraft S/N 53001 – 53442 with Air Comm Air Conditioner System installed. 
   
						

							AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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Figure 21:  Compressor Drive Pulley Installation – Looking inboard from aircraft 
left 
Driveshaft Installation: Aircraft S/N 53443 and ON, with Air Comm Air Conditioner System installed. 
(The 407-040-303-111 Fan Shaft Configuration can be achieved by removing the 407-340-002-101 Weight from the 
407-404-303-113 Shaft). 
   
						

							AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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Figure 22:  Driveshaft Installation – Looking inboard from aircraft left 
Driveshaft Installation: Aircraft S/N 53443 and ON, without Air Comm Air Conditioner System Installed. 
   
						

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Figure 23:  Drive pulley washer stack up configuration -1A  
						

							AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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Figure 24:  Drive pulley washer stack up configuration -1B 
  
						

							AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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Figure 25:  Drive pulley washer stack up configuration -2  
						

							AIR CONDITIONER SERVICE MANUAL 407EC-200M-2 
 
 
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Figure 26:  Drive pulley washer stack up configuration -3