Automatic Miniature Fire Suppression System - AMFSS

The AMFSS range offers a compact, convenient & proven solution that can provide a reliable first-response solution. The easily installed AMFSS range offers you a fire suppression system that works 24/7 providing protection for both people & property.

These can be installed in a variety of applications where they will provide a bolt-in proven solution that minimises the risk of fire damage & loss.

Utilizing the proven technology of a sprinkler type bulb (ampoule) as the trigger mechanism these discharge the fire-suppressing agent when the pre-selected temperature is reached.

When activated the liquid fire suppression agent will upon discharge quickly convert into a gas, the fire suppression agent then suppresses the fires by both cooling & reducing the oxygen levels in the protected areas that it discharges into & onto.

A variety of configurations are available including options such as a pressure switch, gauge, direct response, various different activation temperatures including 68, 79, 93 or 141 degrees Celsius plus the option of manual activation..
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Steel Cylinder

Containing NOVEC1230 (also known as FK-5-1-12) pressurised to 60bar with Nitrogen.

Brass Head Assembly

Standard AMFSS activates at pre-determined temperature. R-AMFSS can be remotely activated. S-AMFSS enables remote monitoring.

Pressure Switch

Optinal, can be connected to monitoring equipment

What is it?

It is a steel cylinder with a metal head assembly on it that contains a fire suppressing agent inside it.

The fire suppression agent is released once the glass ampoule (bulb) in the discharge nozzle assembly bursts.

What’s the Suppression Agent?

The fire suppressing agent is known as NOVEC 1230 when manufactured by 3M. Other companies also manufacture it under the name FK-5-1-12 (reference used in NFPA standards & ISO 14520).

The fire suppressing agent is considered safe for use around humans by the NFPA as it has a NOAEL (No Observable Adverse Effects Level) of 10%.
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How Does the AMFSS Work?

An increase in temperature cause the ampoule (bulb) to rupture.

The spring tensioned plunger ruptures the cylinder disc allowing the release of the fire suppression agent.

diagram

The fire suppression agent travels through the cylinder opening into the brass head assembly.

The fire suppression agent exits head assembly through the pre-drilled holes into the protected space.

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How Does It Activate?

These German manufactured stand-alone systems can be activated manually or automatically.

When fitted with the R-AMFSS thermo bulb the system can be activated remotely for instance by a fire panel, detector or by a switch, terminals are standard 6.3 x 0.3mm blade type.

The S-AMFSS nozzle is normally closed 50mA & allows monitoring but does not have the electrically fired bulb installed. The standard AMFSS nozzle simply activates at the pre-determined temperature.

 All pre-determined activation temperatures are printed on the AMFSS nozzles that are used on the AMFSS systems.
 

What’s The Fire Suppression Agent Do?

The Fire Suppressing Agent is stored in the cylinder in liquid form.

Although the suppressing agent will self-pressurize it is further pressurized with nitrogen (60Bar, 870psi) then released through the nozzle changing state into a gas.

As it is released under pressure & in gaseous form it will travel within the protected space so “shadow effect” is not normally an issue.
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Which one do I need?

The best way to determine this is by documenting this as a risk assessment or fixed system prospect form. Factors to consider include:

  • Volume of risk area?
  • Is the risk area airtight?
  • Risk category?
  • Rules applied?
  • Ambient & peak temperatures?
  • Connections required?
  • Where can the AMFSS be located?
  • Client’s considerations?
  • Photo’s are better than memories?

What are the capabilities?

  • Referenced under NFPA 2001, VDS2381, ISO14520 & EN15004
  • AMFSS 120ml – Class A = 0.229cu/m
  • AMFSS 241ml – Class A = 0.459cu/m
  • AMFSS 360ml – Class A = 0.686cu/m
Note: in case you get asked about a Class E fire – there is no such thing which is why Class A as the most common fire to occur is used. That said, the fire suppression agent is an internationally available, non-conductive & clean agent.

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Please Note: In the video there are references to AMFE which we now refered to as AMFSS.

Installation?

The nozzle assembly includes the “Thermo Bulb” (Ampoule) which detects the fire at the pre-determined temperature.

As such this “Thermo Bulb” must be located within the protected space. The entire AMFSS cylinder assembly can be installed within the protected space or just the nozzle assembly.

A cabinet mounting kit is available to assist with installations where servicing & other practical considerations may mean the cylinder is better located externally to the protected space. Note: P/Clips are still utilized with the cabinet mounting kit, all kits include 17mm nuts & bolts. 

When planning it is also worth considering the orientation of the brackets & leaving enough room to fasten the bolts.

Installation Continued

You will need some basic tools for an installation, as the most common is installing a system into a cabinet (electrical or similar let base the tool selection on this scenario.

  • Ring spanners – 15mm (head), 17mm (nuts & bolts), 19mm (thermos bulb nozzle).
  • Sharp knife or scissors for sealing gland.
  • Drill with sharp drill bits & step drill bit for cabinet.

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Cabinet Installation

There are 3 holes required to be drilled to install the AMFSS mounting kit.

Use the templates provided to determine where the first holes should be located. Drill pilot holes where indicated by the template, progressing the size to fit the bolts.

Once the 3 holes will fit the bolts use the step drill to enlarge the cartridge hole to fit the cartridge through

Cabinet Installation Continued

Once the hole suits the appropriate gland size e.g. for a 241 or 360 it’s a 32mm hole debur the edges of the hole.

Carefully insert the gland sealing around the edges.

Cut the gland starting at the centre & remove the excess material from the centre that’s not required for sealing.
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Installation Points to consider?

The bolts provided are fitted with nyloc nuts so vibration shouldn’t loosen them.

If possible leave space around all sides of the discharge nozzle so the agent can change state (liquid  – gas) more readily.

Consider servicing requirements when installing the system(s), normally the cartridges will need weighing & the nozzles will require checking 6-monthly or annually.

Pressure Switch details

  • Made by WIKA
  • Stainless Steel body
  • CE, UL etc
  • 60Bar rated 8 – 30V
  • 20mA
  • 2m of cable
  • Factory fitted & sealed

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Location of the System

The AMFSS cylinder assembly should be located as close as possible & practical to the risk area.

Consider practical locations such as cabinet doors?? The reason is so fire detection & system activation can occur as soon possible, thereby minimizing the threat to people’s safety from fire as well as the damage & downtime for businesses.

If linked to an alarm system a quick initiation can also help by alert others asap to the danger.

Which options do I need?

  • Is a pressure switch required to shut down machinery or provide a facility for audible &/or visual alarms?
  • Is a gauge required?
  • Is remote activation required? 
  • What rules are applied? Temperature of thermos bulb 68⁰C, 79⁰C, 93⁰C & 141⁰C


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Bolting it together

The AMFSS cylinders head assembly’s all have a nut at the top which has a 15mm OD so use a 15mm open ended ring spanner for it.

The brass nozzle assemblies (AMFSS, S-AMFSS & R-AMFSS) are all 19mm OD so use a 19mm ring spanner when securing it to the cylinder, a 243 Loctite or similar is also recommended.

Using the Cabinet Mounting kit

  • Both the P/clip & cabinet mounting kit use 17mm bots with nyloc nuts
  •  Ensure you leave enough space to do up your mounting bolts?
  • Consider how much room you need for the cylinder head assembly?
  • Make sure there’s enough room within the cabinet to clear the discharge nozzle assembly.
  • Ideally the cylinder would be inverted when installed, that said this is not critical.
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Servicing Requirements

Under the OEM’s specified standard which is UL2166 they are to be serviced at least annually.
  • Isolate the system then remove the activation nozzle assembly before carrying out the service.
  • The usual visual & damage checks apply along with any functional tests for accessories such as alarms.
  • The maximum amount of leakage allowed is 0.25% of the content weight.
  • They are single use non-rechargeable cartridges with a 10-year lifespan.
  • They are single use non-rechargeable cartridges with a 10-year lifespan.

AMFSS Examples

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Mark - National Sales Manager & Export

Steve - Fire Suppression Systems Manager

Alistair – North Island Business Development Manager

Murray – South Island Business Development Manager 

Office Phone: 09 818 8048