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EFFECTIVITY: ALL 21-00-09
Page 2001
FEBRUARY 16, 2010
SCHEMATIC AND WIRING DIAGRAMS
21-00-09-99-801
4.0
R-134a AIR CONDITIONING SYSTEM SCHEMATIC AND WIRING DIAGRAMS
SUBTASK 21-00-09-99-001
4.1
R-134a Refrigerant Flow Schematic:
4.1.1
The following schematic shows the system components and the flow of the R-134a refrigerant.
Figure 2 R-134a Refrigerant Flow Schematic
Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
EFFECTIVITY: ALL 21-00-09
Page 2002
FEBRUARY 16, 2010
SUBTASK 21-00-09-99-002
4.2
R-134a System Electrical Schematic:
4.2.1
The following electrical schematic shows the system components and how they interrelate to each other.
Figure 3 Electrical Schematic
Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
EFFECTIVITY: ALL 21-00-09
Page 3001
FEBRUARY 16, 2010
DISASSEMBLY
TASK 21-00-09-00-801
5.0
R-134a AIR CONDITIONING SYSTEM COMPONENT - DISASSEMBLY
SUBTASK 21-00-09-99F-010
5.1
General:
WARNING: SERVICE TECHNICIANS ARE ADVISED TO OBSERVE STANDARD SAFETY PRECAUTIONS, SUCH AS WEARING PERSONAL SAFETY GEAR, TO PREVENT INJURY WHILE PERFORMING SERVICE TO THE UNIT.
CAUTION: SERVICE TECHNICIANS MUST PREVENT CONTAMINATION OF INTERNAL SYSTEM PLUMBING DURING ANY SERVICING AND/OR MAINTENANCE OPERATION. THIS INCLUDES NOT ALLOWING THE RECEIVER DRYER TO BE EXPOSED TO ATMOSPHERIC CONDITIONS FOR ANY LENGTH OF TIME. ALL PLUMBING LINES SHOULD REMAIN CAPPED WHENEVER POSSIBLE DURING THE SERVICING OF THE SYSTEM.
CAUTION: RECEIVER DRYER MUST BE REPLACED ANY TIME THE VCS PLUMBING IS OPENED FOR MAINTENANCE. REFER TO DISASSEMBLY (SECTION 5) AND ASSEMBLY (SECTION 9).
NOTE: Refer to Testing and Fault Isolation (Section 3) for establishing the condition of the component or most probable cause of detected malfunction(s) to determine extent of disassembly required. Disassembly should only be performed to the extent necessary to access any faulty subassembly.
5.1.1
Gain access to the Compressor Drive Module, Condenser Blower Assembly, Evaporator Module, or Receiver Dryer (refer to the aircraft maintenance manual for removal of access panels and other hardware that might need to be removed)
5.1.2
Verify that power is removed from aircraft. If it is not practical to remove aircraft power, technician must pull and collar applicable circuit breakers.
5.1.3
Partial disassembly of system components and other subcomponents is required in order to facilitate the required inspections in accordance with the inspection schedule (Section 7). Disassemble the components just enough to perform the required inspection.
5.1.4
If replacement of any component is required, further disassembly may be required. If component requires complete disassembly, keep all parts of each subassembly in a separate and clean tray.
5.1.5
In the event that a component requires disassembly and the removal of refrigerant plumbing lines or hoses, ensure that the system refrigerant charge has been recovered prior to starting maintenance (refer to Servicing, Section 13).
NOTE: Do not disassemble the parts unnecessarily.
Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
EFFECTIVITY: ALL 21-00-09
Page 3002
FEBRUARY 16, 2010
5.1.6
Refer to Illustrated Parts Listing (IPL) for figure/item numbers (Section 11).
5.1.7
Tools, fixtures, equipment, or consumable items required:
•
Small hand tools and socket set
•
Straight edge
•
Measuring device
•
Micrometer
•
Scribe or wire hook
•
Volt or OHM meter (digital)
•
Shop air, 40 PSIG max
•
Respiration mask
SUBTASK 21-00-09-00-001
5.2
Receiver Dryer disassembly procedures:
5.2.1
Removal of Receiver Dryer
5.2.1.1
Verify that system refrigerant charge has been recovered (refer to Servicing, Section 12)
5.2.1.2
Disconnect electrical wiring to binary pressure switch.
5.2.1.3
Disconnect refrigerant plumbing connection from receiver dryer inlet port.
5.2.1.4
Disconnect discharge refrigerant line from receiver dryer outlet port.
5.2.1.5
Loosen receiver dryer attaching clamps and slide receiver dryer out.
SUBTASK 21-00-09-00-002
5.3
Compressor Drive Module disassembly procedures (refer to Figure 10001):
5.3.1
Removal of Belt Cover (30)
5.3.1.1
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OPERATING, SERVICING, AND COMPONENT MAINTENANCE MANUAL(12)
