REMOVE/INSTALL CONTROL UNIT 9,000 BTU.
This task covers:
General Mechanics Tool Kit, Appendix B, Item I
Materials / Parts
Dry Cleaning Solvent, Appendix E, Item 40
Weatherstripping, Appendix G, Item 1
Packing Compound, Appendix E, Item 28
Weather Shield, Appendix G, Item 3
General Safety Instructions
Before performing any maintenance actions on electrical equipment,
ensure all electrical power has been turned off. Death or serious injury
may occur from failure to do this.
Remove environmental control unit (ECU) 9,000 BTU. See figure 4-18.
Open circuit breaker CB3 and CB4 located in the panelboard assembly.
Disconnect ECU main input power cable
Turn hex head of connector rod and remove remote plug.
Remove eight plenum mounting screws.
Remove packing compound located around plenum area and capillary tubing below the ECU.
Be sure plenum area and capillary tubing is free of packing compound.
Remove temperature selector switch sensing bulb clamp located on top of evaporator coil by removing two
clamp screws and two lock washers and retain for reuse.
Remove sensing bulb from mount plate. Be sure not to break or kink sensing line during removal.
Remove outside weather shield.
Remove four isolation mounting bolts, washers, and lower isolation mounts.
4-66 Change 3