NLCTA NLCTA CO2 Fire Suppression Maintenance

NLCTA CO2 Fire Suppression Maintenance

Purpose

The PFN Modulators at NLCTA are equipped with a Carbon Dioxide fire suppression system. When the high sensitivity smoke detection system alarms, the suppression system discharges an entire bottle of CO2 into all three modulators. This document describes the replacement and rearming of the suppression system.

Tools needed:

·  Flat blade screwdriver

Procedure

  1. System should be in the discharged state. The following should be true:

·  The ELECTRIC CONTROL HEAD (to the left of the CO2 bottle) should read “RELEASED”.

·  The Alarm Control Box (the red one almost immediately above the bottles) should indicate “POWER ON” and “RELEASE OUTPUT TROUBLE”. It will be beeping every 9 seconds.

Note that if step 8 (below) were done prematurely, then the control box will be indicating normal operation.

  1. Remove the ELECTRIC CONTROL HEAD from the bottle without using any tools. Rock the head back and forth while untwisting the hex nut holding the unit on the bottle. Let unit dangle when done with this step.
  2. Remove the discharge cap from the bottle. This has a flexible rubber hose leading the system piping. Twist the head back and forth while loosening the large nut counter-clockwise (viewed from above). Let unit dangle when done with this step.
  3. Remove protective steel bottle cap from spare bottle.
  4. Probably there will be a protective cover cap on the new bottle where the ELECTRIC CONTROL HEAD screws on. Remove and transfer this to the empty bottle.
  5. Unstrap bottles from wall and transfer the new bottle of the position closest to the Alarm Control Box. Chain bottles back using all available straps. The full bottle should be orientated to allow the ELECTRIC CONTROL HEAD to screw on from the left.
  6. Reinstall discharge cap on the new bottle. Twist nut by hand until snug, and then twist head back and forth while tightening nut until unit is firmly seated and snug.
  7. Rearm ELECTRIC CONTROL HEAD. Using a screwdriver, twist slotted control beyond release and then to the SET position. The control should read “SET”. DO NOT PROCEED with the next step unless unit is PROPERLY ARMED.
  8. Replace the ELECTRIC CONTROL HEAD on to the bottle. Twist the nut tight and rock back and forth a bit while tightening the nut until the unit is fully seated and snug against the bottle.
  9. Mark the empty bottle. Cap the bottle with the steel cap.
  10. Call ESH to schedule a bottle replacement.

Approval


NLCTA Operations Manager / Date

NLCTA Safety Officer / Date

SLAC Fire Marshal / Date

October 4, 2004 02-03-17-R0 Page XXX