Post on 22-Dec-2015
2
Business or building protection ?
BUSINESS PROTECTION
Smoke is the problem
Small and Medium Size (<200…400 m2)
Activation by aspirated detection
Products DAU 20 S... DAU 20 R…
Approvals DAU 20 S (FM)
There is no FM, UL or VdS approved fire test protocol for DAU R room extinguishing system
BUILDING PROTECTION
All sizes
Activation by detection or elevated temperature
Products GPU Light Hazard
wet pipe
pre-action DAU 20 S
Approvals GPU Light Hazard
VdS (OH1)
FM (LH) DAU 20 S (FM)
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Smoke is the problem
Cable and plastic fires creates very large amounts of smoke in the fire
The smoke will damage the computer and telecom equipments
Burning of PVC cable will produce Hydrochloric acid vapors(HCl)
Cables, which fire resistance is improved by halogens(chlorine, bromine, fluorine, iodine) will produce acidic vapors in the fire
PTFE insulated cables will produce very corrosive fire products, if burned
Halocarbon extinguishing systems will produce acidic breakdown products, like hydrogen fluoride (HF) in the fire
The discharge of all of the extinguishing gases creates a homogenous mixture of smoke and extinguishant throughout the enclosure, reducing the visibility and making the environment more hazardous, and spreading the dust and corrosive vapors inside the computer or telecom equipments
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Smoke Scrubbing
Hi-fog spray heads in scrubbing pipework
high velocity fog causes venturi effect
smoke sucked into pipework
water drops condense at bend
“dirty water” to drain
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Scrubbing efficiency
0
500
1000
1500
2000
2500
3000
3500
4000
0 120 240 360 480 600
Time (s)
Con
cent
ratio
n (p
pm)
HCl Level
without scrubbing with HI-FOG scrubbing
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Water Effect On Equipment
Minimal water amount - 15 l / unit
De-mineralised water - same as used to clean smoke damaged computers
1st phase, heavy scrubbing and extinguishing
- First 30 seconds - 10 l water/unit
2nd phase, “dry fog”
- Last 8 minutes - 5 l water/unit
Start of air-conditioning quickly de-humidifies room
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00:00
Sub-floor System
Cable or joint fire in sub-floor
1st alarm level
2nd alarm level shuts off air-conditioning
Optionally starts safe shutdown of equipment
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00:00 00:30
Sub-floor System
3rd alarm level activates HI-FOG
First 30 seconds high density fog in scrubbing pipes
Replaces hot smoke with cool air in sub-floor and cabinets
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00:00 00:30 03:00
Sub-floor System
Changed to “dry fog”
Little water actually discharged in space
Extinguishes fires in sub-floor and cabinets
“Black water” in drain
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00:00
Sub-floor & Room Extinguishing
Arson fire in waste basket
1st alarm level
2nd alarm level shuts off air-conditioning
Optionally starts safe shutdown of equipment
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00:00 00:30
Sub-floor & Room Extinguishing
3rd alarm level activates HI-FOGSub-floor system
First 30 seconds high density fogin scrubbing pipes
Over pressurisation prevents smokeentering cabinets
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00:00 00:30 05:00
Sub-floor & Room Extinguishing
Hi-fog heads on ceiling discharging into room
Sub-floor changing to “dry fog”
Over pressurisation prevents smoke entering cabinets
Extinguishes fire in sub-floor, cabinets and room
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The HI-FOG Package
HI-FOG spray heads & mounting adapters
Smoke scrubbing pipework Ø 100…110 mm metal and plastic (PPS)
Stainless steel tubes, Ø12 mm
Self-contained HI-FOG Cylinder Unit(s)
No section valves
Easily replaced standard nitrogen cylinders
Designed to be used with early detection system IRIS, Stratos, Vesda
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Sub-floor system - DAU 20 S
For sub-floor smoke scrubbing and fire extinguishing
DAU 20 S-2-2-110 20 liter water cylinder assembly (10l+10l)
- Upper cylinder 10 liters of water
- Lower cylinder 7,5 liters of water
Sub-floor system
2 nitrogen cylinders
2 spray heads
Ø 110mm metal scrubbing duct
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Sub-floor system - DAU 20 S
Design criteria by FM
max. sub-floor height 0,5 m max. room size 5 x 10 m 25 m3 per system duct holes in short side two U-loops with opposite discharge directions Multiple systems installed back-to-back along the long side Computer safe shut down started
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Room extinguishing - DAU 20 R
For room fire extinguishing
DAU 20 R-3-4 20 liter water cylinder assembly(10l+10l)
- Upper cylinder 10 liters of water
- Lower cylinder 7,5 liters of water
Room extinguishing system
3 nitrogen cylinders
4 spray heads (ceiling mounted)
DAU 20 R-3-3
DAU 20 R-2-2
DAU 15 R-1-1
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Room extinguishing - DAU 20 R
Design criteria max. distance from wall 2 m, spacing 4 m max. ceiling height 3m max. area and volume /head 12,25m2 and 37,5 m3
for 3…5m ceiling heights spacing shortened based on volume protection
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Large data and telecom centers
DAU20S for sub-floor + GPU with sprinklers for the room
Or GPU with sprinklers for sub-floor and for room