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BUS DRIVER MANUAL
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Edition 2.1
Art. No. 8012-002 Overview
This manual is aimed at the bus driver and other users and should be placed avaliable
in the driver area. This manual describes Fogmaker’s fire extinguisher system for closed
engine departments.
Fogmaker’s fire extinguisher system’s main parts
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Edition 2.1
Content
General description
Pertaining components
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4
Pertaining components Extinguisher cylinder
Release valve for extinguisher cylinder
Detector cylinder
Novec system
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6
7
8
8
Alarm test
9
Alarm test with Fogmaker bus alarm
Alarm test in an existing alarm system - multiplexer 9
9
In the event of fire
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Fire alarm signal with Fogmaker bus alarm
Fire alarm signal in existing alarm system - multiplexer 9
9
Low pressure alarm
10
In the event of a smoke alarm
10
Fogmaker alarm
Existing alarm system - multiplexer 10
10
Action after a fire
Daily inspection of the extinguisher system
Annual controls
5 year service and 10 year overhaul
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General description
Pertaining components
This bus is equipped with a fully automatic
extinguisher system for the engine compartment and possible separate heating areas.
The system is activated hydro-pneumatically
and works without any power supply. When
extinguishing the extinguishant is sprayed
through nozzles that break down the fluid
into pillar-shaped mist clouds that cool the
temperature and force the air out. The extinguishant is mainly based on antifreeze
water. The extinguishing time is normally
between 3-5 seconds and the effective time
is 50-75 seconds.
Pertaining components
This system consists of:
• the extinguisher cylinder (1)
• the detection cylinder (2)
• pipe system with nozzles (3)
• detector hose of polymer connected
between the detection cylinder and the
extinguisher cylinder (4)
• Fogmaker alarm lamp and alarm buzzer
with light and sound alarm, alternatively
existing bus-specific alarm panel (5)
Overview of components and how they schematically are connected
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Edition 2.1
The detector hose and the nozzles are located in the upper part of the engine compartment and if applicable heating areas. The
extinguisher cylinder and the detector
cylinder are located in a separate area. The
smoke alarm is located in the ceiling in the
passenger compartment. Fogmaker’s alarm
lamps and alarm sirens are located in the
driver’s position. For alarms integrated in
an existing bus system e.g., CAN bus – multiplexer, see the bus manufacturer’s manual
for the location.
In the event of fire the detector hose bursts.
When the pressure drop in the detection
system has fallen to approx 7 bars a valve
on the extinguisher cylinder is activated and
the system is released.
The pressure switch on the detector cylinder sends an alarm to the driver position.
As an option there is also a manual and an
electric punch that is mounted on the detector hose. With the help of this the driver
can manually trigger the system by cutting
off the detector hose.
Overview of components and where in a bus they are situated, variations do occur
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Edition 2.1
Extinguisher cylinder
On delivery the extinguisher cylinder is filled to approx 105 bars pressure. The propellant consists of nitrogen gas. The pressure
can be read off on manometer and shall be
within the green sector. The extinguisher
cylinder is also available in a version with
two or three connected cylinders. As an option there is a pressure switch that gives an
alarm if the pressure falls below approx 80
bars, the same alarm as for a fire. On the
release valve a
Information decal Art No 8100 seen on the extinguisher cilynder
Extinguisher cylinder top view with new release
valve - see opposing side.
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Edition 2.1
Release valve for extinguisher cylinder
The release valve has a safety screw that
should be removed when the system is active. There are two different types of release
valves; one older where the safety screw is
mounted from the top. This should be removed to activate the extinguisher.
The newer valve has the safety screw mounted from the side. The safety screw is red
and should be removed to activate the system. A green, (shorter) cover screw shall
then be mounted to prevent dirt from entering the release valve.
New release valve
The safety screw shall always be mounted
before service, installation and transport
when the extinguisher cylinder is pressurized. The safety screw prevents unintentional release of the extinguishant.
It is absolutely forbidden for non-authorized personnel to take any action on the extinguisher cylinder when it is pressurized.
The pressure in the cylinder can then be
released and can with great power injure a
person seriously.
Old release valve
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Edition 2.1
Detector cylinder
Novec system
On delivery the detector cylinder is filled
with detector fluid and pressurised with
nitrogen gas to approximately 24 bars. The
pressure can be read off on a manometer
and shall be in the green sector. The detector
cylinder is equipped with one or two (optional) pressure switches that send an alarm if
the pressure falls below 14 bar respectively
7 bar (optional) . The detector cylinder has
a tap that shall be open when the system is
active.
In some cases, a gas extinguisher system
called Novec 1230 is installed in the heater
area in the bus. This system has an identical
detector cylinder as the standard detector
system, a decal shows this is a Novec system. The Novec system basic function is a
gas filled detector tube that breaks at a fire
and releases the extinguishing agent.
The Novec cylinder is equipped with manometer and a pressure switch that is connected to the same alarm as the standard fire
extinguisher system.
Pressure switch 14 bars (standard)
Manometer
Tap (open position)
Pressure switch 5 bars (option)
Detector cylinder, top view, with two pressure
switches and a standard L-connection after the tap.
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Edition 2.1
Alarm test
In the event of fire
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•
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•
Shut down engine
Evacuate vehicle
Cut off power supply
Keep engine bonnet closed at least for
5 minutes
• If needed, use hand fire extinguisher
• Contact service personnell
The fire alarm shall be tested before the
work period commences.
Alarm test with Fogmaker bus alarm
• Press the test button with the engine fire
lamp.
Fire alarm signal with Fogmaker bus alarm
In the event of a fire the red lamp marked
with engine fire is flashing and the alarm siren gives an intermittent sound. check the
1747 (Older model): When the test button is
pressed the engine fire lamp shall flash and
an intermittent alarm sound shall be heard
in the driver position.
1747-020-00 (New model): When the test
button is pressed the engine fire lamp shall
be constant lit and a constant alarm sound
shall be heard in the driver position.
If no fire has occurred and the system has
not been triggered it indicates that there is
too low a pressure in the extinguisher cylinder or the detector cylinder. Contact service
personnel.
Alarm test in an existing alarm system multiplexer
Fire alarm signal in existing alarm system multiplexer
See the bus manufacturer’s manual for
alarm test.
See the bus manufacturer’s manual for
alarm signals in fire alarms.
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Edition 2.1
Low pressure alarm
Action after a fire
In the event of an alarm for low pressure in
the detector cylinder or extinguisher cylinder, contact service personnel.
The fire alarm will sound until the alarm is
actively shut off. This is done by contacting
authorized service personnel. For systems
with the Fogmaker bus alarm the alarm signal can be shut off by removing the cover of
the pressure switch on the detector cylinder
and the two electrical cables are twined together.
In the event of a smoke alarm
Do not start the vehicle before the cause
of fire has been established and corrected.
Fogmaker alarm
In the event of a smoke alarm the lamp on
the sign, ”Smoke alarm upper deck” will
be lit and a constant sound will be heard –
check the passenger compartment for the
cause.
The extinguishant does not normally affect
the function of the engine. Starting difficulties can however occur for diesel engines
since the extinguishant contains water. It
is worth considering that the extinguishant
can cause corrosion damage if the engine is
not run within a short time after the fire. For
the sake of safety the engine should be protected by filling a little oil and turning over
the engine a couple of revolutions with the
starter motor.
In order to avoid corrosion on metal parts
and unwanted short circuiting in the electrical system, sanitation shall be carried out
as soon as possible. This is done by rinsing
the system with fresh water, preferably high
pressure water. Also use some form of alkaline washing fluid, otherwise a film that collects dirt can remain.
SMOKE ALARM
UPPER DECK
Existing alarm system - multiplexer
See the bus manufacturer’s manual for
alarm signals in the event of a smoke alarm.
Check the passenger compartment for the
cause.
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Edition 2.1
Daily inspection of the extinguisher system
Annual controls
Check that possible lamps for low pressure in the extinguisher cylinder or detector
cylinder are not lit. Check that the pressure in the extinguisher cylinder and the detector cylinder is within the green sector on
the manometers.
The extinguisher system shall be controlled
once a year by authorized personnel.
See service manual for detailed instruction.
5 year service and 10 year overhaul
Every fifth year the extinguishant shall be
exchanged due to the characteristics of the
product. Every tenth year the extinguisher
cylinder shall undergo an overhaul where
the extinguisher cylinder will be disassembled and checked for wear and damages.
5 year service and 10 year overhaul may
only be carried out by authorized personnel.
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Edition 2.1
Fogmaker International AB
Postadress:
Box 8005
350 08 Växjö
www.fogmaker.com
Leveransadress:
Sandvägen 4
352 45 Växjö
12
Tel: +46 470-77 22 00
Fax: +46 470-77 22 10
[email protected]
Edition 2.1