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Refrigerated Storage Application Notes
System Sensor
Refrigerated Storage Design Guide
Contents
1.
Background Information ............................................................................................................................. 1
1.1
1.2
1.3
1.4
2.
Designing for Effective Fire Protection ............................................................................................................. 3
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.
The Effects of a Temperature Drop.......................................................................................................................9
Condensation on the Sampling Pipe Outer Surface..............................................................................................9
Crystallization on the Sampling Pipe Outer Surface ........................................................................................... 10
Condensation Inside Sampling Pipes ................................................................................................................ 10
Crystallization Inside Sampling Pipes ................................................................................................................11
Installation Considerations ........................................................................................................................... 11
4.1
4.2
4.3
4.4
4.5
4.6
5.
Levels of Protection ............................................................................................................................................3
Sampling Pipe Material ......................................................................................................................................4
Positioning Pipes and Sampling Holes ................................................................................................................4
Sampling Pipe Insulation ...................................................................................................................................6
Sealing Sampling Pipe Penetrations ...................................................................................................................6
Compensating for Sampling Pipe Contraction......................................................................................................7
In-rack Protection...............................................................................................................................................8
Ceiling Void Protection .......................................................................................................................................8
Other Areas to be Protected................................................................................................................................9
Preventing Condensation and Crystallization ................................................................................................... 9
3.1
3.2
3.3
3.4
3.5
4.
Fire Safety Considerations in Refrigerated Storage Areas ..................................................................................... 1
Performance-Based Design................................................................................................................................. 1
Key Design Considerations .................................................................................................................................2
Why Use System Sensor Smoke Detection? .........................................................................................................2
Sampled Air Warming........................................................................................................................................11
Heat Tracing..................................................................................................................................................... 13
Exhaust Air Treatment ...................................................................................................................................... 13
Water Traps ..................................................................................................................................................... 14
Integration with Pre-action Sprinklers............................................................................................................... 14
Battery Backup ................................................................................................................................................ 16
Ongoing Considerations................................................................................................................................17
5.1
5.2
5.3
Running the System Sensor System .................................................................................................................. 17
System Commissioning .................................................................................................................................... 17
Service and Maintenance ................................................................................................................................. 17
Appendix – Heat Tracing .......................................................................................................................................18
References ......................................................................................................................................................... 20
Note: This document intended only as a guide to the application of fire detection systems.
Reference must be made to relevant national and local standards.
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