Computer & Telecom Rooms

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)

3

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

4

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

9

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

15

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

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SMOKEis the problem

Why Use Gas? If