TM 10-4520-259-13&P
4-17. ELECTRICAL COMPONENTS
This task covers:
a.
Inspect
b.
Test
c.
Remove
d.
Install
INITIAL SETUP:
Tools:
Tool set, General (Item 1, Appendix B)
Materials/Parts:
Rags, Wiping (Item 15, Appendix F)
Tags (Item 17, Appendix)
Equipment Condition:
Water heater shut off and electrical power disconnected.
INSPECT
Inspect the conduits, electrical fittings and wiring for damage, rust, corrosion or exposed electrical wires.
Replace faulty components.
WARNING
Lethal voltage is present when the water heater is connected to power source.
Disconnect from power source before inspecting or repairing any electrical
component. Be careful not to touch electrical connections. Electrical shock and/or
death may result from failure to heed this warning.
TEST
a.
Going thru both thermostats, rotate shaft on operating control clockwise until a click is heard.
Perform continuity test with a multimeter. Zero ohms should be read. Counterclockwise should read infinity.
b.
If a click was heard, remove cover from conduit box. If a click was not heard, replace switch.
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