Checklist for Constructing a Clean Agent Room

Posted by Lee Kaiser on Nov 19, 2012 9:14:00 AM

Your first question may be, why would this be important to me?  Typically, during newconstruction or remodeling projects, it can be easy to overlook special requirements needed to protect an area with a Clean Agent Fire Suppression System. Making these construction improvements after the fact will add time, cost and mostly frustration to anyone working under a deadline.  This “Check List” will save you time and money.

Building a Clean Agent Room

By no means is this an exhaustive list, but listed below are the major items which must be considered by you and your contractors.

General Contractor: Walls, Ceiling, & Floors

  • Porous block walls must be sealed slab-to-slab to prevent gas from passing through the block. Two or three coats of paint are typically required.

  • Protected areas should be enclosed with wall partitions which extend slab-to-slab. In areas where this is not possible, all ceiling tiles should be clipped down and openings caulked.  Upgraded gypsum board ceiling tiles are recommended (Gridstone Fire-Shield).

  • All walls should be caulked around the inside perimeter of the room where the walls rest on the floor, where the walls intersect at the corners and where the walls intersect with the ceiling above.

  • Any penetration, including all conduit, cable trays, outlets, switches and wire troughs must be fire caulked and sealed.

  • If a raised floor continues out of the protected space, bulkheads must be installed under the floor directly under the partitions. These bulkheads must be caulked top and bottom.

  • All floor drains should have traps and the traps should be designed to have water in them at all times or charged with mineral oil.

  • Special attention should be given to sealing any cracks below the suspended ceiling.

General Contractor: Doors & Windows

Clean Agent Room
  • All doors must have a threshold and/or sweep installed.

  • Egress doors should swing out of the protected space.

  • Doors may require weather stripping around the jam to ensure an air tight seal.

  • Latching mechanisms are necessary and door closers may be required.

  • If doors must remain open, an electromagnetic door holder will be required and released prior to agent discharge.

  • All types of windows or other types of openings must be fire caulked and sealed.

Mechanical Contractor: HVAC Specialties

  • To ensure the protected area is air tight, dampers may be required in the ductwork at the perimeter walls of each protected space.

  • Dampers must be spring loaded or motor operated to provide 100% air shut off.

  • All dampers are to be UL 555S to meet the 5% minimum leakage requirements.

  • All HVAC in the protected space shall be shutdown prior to agent discharge. Self-contained HVAC units may continue to run if approved by the AHJ.

  • HVAC shut down control relays should be installed to within 3 ft. of each unit.

  • All exhaust fans should be dampered. Fire alarm system control relays are used to shutdown any fans.

  • All fresh air intakes should be dampered and closed using fire alarm system control relays.


Electrical Contractor: Power and Interface Wiring

  • 120 VAC dedicated 15 AMP circuit to the suppression control panel is required.

  • Power to all dampers – control relays within 3 ft. of damper.

  • Fire alarm monitoring - contacts for alarm, supervisory and trouble conditions are available within the fire control panel. Connection is handled by fire system contractor.

  • Purge system control wiring to HVAC units and exhaust fans are interfaced with the fire alarm system control panel. Connection is handled by the fire system contractor.

ORR Protection Systems is known by its customers as the “Mission Critical Fire Protection EXPERTS!” Please consider us a resource. If you have further questions about constructing a clean agent room, ask the EXPERT! Click Here  

Topics: Applications, Contractors, Suppression, Industry Education

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