4-30. REMOVE/INSTALL PURGE INTAKE DOOR DAMPER MOTOR - continued.
Install Intake Door Damper Motor. See figure 4-19.
Clip linkage to new motor.
Attach new motor to mounting plate with two screws, lockwashers, and flat washers.
Attach motor linkage to damper blade with two screws, flat washers, lockwashers, and nuts.
Draw motor leads through conduit and into 2" x 4" junction box located on plenum using line previously attached.
Align damper frame and enclosure and attach to petroleum laboratory with fourteen screws and flat washers.
Replace filter and screen and fasten in place with four screws and flat washers.
Fasten purge door limit switch and mounting bracket in place using two fat washers and retaining nuts.
At 2" x 4" junction box located on plenum, connect motor leads and remove tags.
Replace junction box cover and fasten in place with two screws.
Run an operational test to check new motor.
Procedures for removing and replacing the opposite purge intake door damper motor are identical
to those outlined in the preceding paragraph.