TM 10-6640-216-13&P
4-22. REMOVE/INSTALL BLACKOUT MICROSWITCH.
This task covers:
a. Removal
b. Adjustment
c. Installation
INITIAL SET-UP
Tools Reaquired
General Mechanics Tool Kit, Appendix B, Item 1
General Safetv Instructions
WARNING
ELECTRICAL SHOCK
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.
REMOVAL
Remove blackout microswitch. See figure 4-14.
a.
Open circuit breaker CB17 located in the panelboard assembly.
b.
Verify all laboratory lighting is off to indicate power has been removed from
microswitch.
c.
Remove conduit connector from microswitch.
d.
Remove two mounting screws and remove microswitch from rear wall.
e.
Remove two cover plate screws and remove cover plate.
f.
Loosen three terminal screws. Tag and disconnect wires from microswitch.
ADJUSTMENT
Adjust blackout microswitch. See figure 4-14.
a.
Verify that switch is activated when laboratory door is closed. If not, proceed to step b.
b.
Loosen adjustable nut and move arm until closing laboratory door activates switch
INSTALLATION
Install blackout microswitch. See figure 4-14.
a.
Connect wires to microswitch and tighten three terminal screws.
b.
Install two cover plate screws.
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