4-31. MECHANICAL ROOM PURGE EXHAUST DAMPER MOTOR.
This task consists of:
General Mechanics Tool Kit, (Appendix B, Section III, Item 1)
Air Tank Removed (Paragraph 4-35)
General Safety Instructions
Before performing any maintenance actions on electrical equipment, ensure all
electrical power has been turned off. Failure to comply with this warning may
result in serious injury or death.
Remove Mechanical Room Exhaust Damper Motor. See Figure 4-20.
Remove nine screws (1), lockwashers (2), and housing (3) covering damper housing (4). Discard lockwashers.
b. Remove cover from electrical junction box (5) located on bottom of motor (6). Tag and disconnect motor leads and
Remove six screws (8), washers (9), lockwashers (10), nuts (11), spacers (12), and damper assembly (13) with
motor (6). Discard lockwashers.
Install Mechanical Room Exhaust Damper Motor. See Figure 4-20.
Install damper assembly (13) with motor (6) and secure with six screws (8), lockwashers (9), washers (10), nuts (11),
and spacers (12).
Connect conduit (7) and motor leads as tagged to electrical junction box (5). Remove tags and install cover.
Install housing (3) and secure with nine screws (1) and lockwashers (2).
Install air tank (paragraph 4-35).
Run an operational test to check damper motor.