TM 10-5410-228-24
This task covers:
a. Removal
b. Installation
INITIAL SETUP
Tools/Test Equipment:
Equipment Conditions:
Shop Equipment, Automotive Maintenance and
ECV shut off, power shut off.
Repair (Item 38, Appendix B)
Power panel and rear control panel tagged.
Tool Kit, Service: R22 Refrigeration Unit
ECU removed (see para 3.9.21).
(Item 52, Appendix B)
ECU covers and doors opened or removed as
Gloves (Item 16, Appendix B)
required (per para 2.14.1).
Goggles (Item 17, Appendix B)
R22 refrigerant system recovered (see para 3.9.1).
Heater coil removed (see para 3.9.8).
Materials/Parts:
Thermal expansion valve removed (see para 3.9.10)
Six Lockwashers (Item 18, Appendix E)
The R22 refrigerant system is pressurized. To prevent injury to personnel, gloves and eye
protection must be worn when working on R22 refrigerant system.
Prevent contact of R22 refrigerant with flame or hot surface. Heat causes R22 refrigerant to
break down and form carbonyl chloride (phosgene), a highly toxic and corrosive gas.
R22 refrigerant must be recovered. Venting R22 refrigerant into the atmosphere is a
violation of public law and subject to severe penalties.
Do not attempt to remove or connect refrigerant servicing equipment while ECV is running.
Removal and brazing of refrigerant tube assemblies shall be in accordance with safety
requirements. All safety requirements applicable to brazing of tubes shall be observed.
Failure to observe these warnings can result in injury to personnel.
a. Removal (Refer to Figure 3-14)
Remove six screws (1), six lockwashers (2) and six flat washers (3) securing evaporator coil (4) and
remove evaporator coil (4) from inside ECU enclosure (5). Discard six lockwashers (2).
b. Installation (Refer to Figure 3-14)
Position evaporator coil (4) inside ECU enclosure (5) and secure with six screws (1), six new
lockwashers (2) and six flat washers (3).