4-16. REMOVE/INSTALL PURGE PORT DAMPER ASSEMBLY.
This task covers:
General Mechanics Tool Kit, Appendix B, Item 1
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.
All power to laboratory turned off by shutting down the external generator.
Refer to F0-1 Electrical Schematic for electrical disconnections/
Remove the purge port damper assembly. See figure 4-7
Disconnect damper motor electrically from distribution box and tag for reconnection.
Open purge port door, remove four screws and flat washers from filter.
Remove filter and set aside for reassembly
Remove four screws that extend through door hinge, damper flange, purge opening
frame and laboratory wall. Remove nut and two flat washers from each screw. Drill out
Remove damper housing with motor attached from purge opening in laboratory wall.
Remove purge door limit switch. See figure 4-7
Disconnect purge door limit switch electrically from distribution box.