Detection Testing Capability

DOE-STD-1066-99

14.7.3.3

Control units and signaling alarm systems connected to the heat detectors

should be listed for their intended purpose.

14.7.3.4

Existing detection systems or pilot systems that provide equivalent and

reliable methods of detection and alarm signaling transmission (as

determined by past performance and/or engineering analysis) that are

electrically supervised but are not listed may continue to be used while

they remain serviceable.

14.7.4

Detection Testing Capability

14.7.4.1

Detector installations should be engineered and installed so that they can

be tested during the life of the detector. Remote testing should be

provided for detectors that are not accessible due to unacceptable

hazards. One method of providing remote testing is to provide detectors

with heating strips or coils that can be energized by a separate control

unit. If a line-type heat detection system is used, a heat testing pad

should be provided outside the plenum for operability testing of the

system.

14.7.4.2

Where high contamination levels do not exist, detectors may be installed

so that the detector can be removed from the plenum enclosure and

tested externally.

14.8 Deluge Spray Suppression Systems

14.8.1

Location

14.8.1.1

Automatic and manual water deluge spray systems should be provided

inside all final filter plenums for protection of the filters where they have a

leading filter surface area greater than 16 square feet (1.4 square meters).

14.8.1.2

Automatic water deluge spray systems should be provided inside all final

filter plenums having a leading surface area of 16 square feet (1.4 square

meters) or less when the filter plenum is not separated by fire rated

construction.

14.8.1.3

Plenums that have already been built and are in service before issuance

of these guidelinesare not required to be backfitted with automatic or

manual water deluge spray systems unless there is a significant hazard

that endangers building occupants, the public, or the environment, as

determined by an FHA or as required by the AHJ.

14.8.1.4

The design of water deluge spray systems should reflect the potential for

filter failure mechanisms, such as filter media damage resulting from

weakened media due to water absorbtion and excessive differential

pressures during water discharge. Such failure mechanisms can be

significantly mitigated by throttling back fan controls to reduce the filter

pressure or by providing redundant filters.