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AFU 2 & AFU 4

5

CONNECT SUPPLY

Connect breathing air supply to the 

AFU inlet and ensure that the flow is in 

the correct direction (indicated by an 

arrow on top of the filters). Check that 

inlet pressure does not exceed 16 bar.
CAUTION:

The AFU MUST be positioned 

vertically or it will not function 

correctly.
Ensure that the positioning of the 

AFU is such that it is unlikely to be 

damaged, tilted or overturned.
Ensure that the hose cannot become 

kinked or constricted.
The second stage Bulls eye is showing 

a white colour. Renew filter element if 

the red ‘warning’ indicator is showing.
Listen for any audible leaks and ensure 

that all hose connections and filter 

retainers are secure. Rectify faults 

immediately.

CHECK SUPPLY 

PRESSURE AND FLOW

Connect breathing apparatus supply 

hose to the AFU outlet. Check that 

supply pressure and flow at the 

extremity of the hose, adjacent to 

the wearer, are in accordance with 

the figures given in Table 1 or 2 (as 

appropriate).
If the AFU inlet pressure is sufficient but 

the hose outlet pressure is low, check 

to ensure that the filters do not need 

replacing. Replace the filters if required.
Once fully satisfied that the equipment 

is functioning correctly, proceed to 

undertake the required tasks.
WARNING:
During use, the airline supply equipment 

must be under constant supervision 

in order to ensure that an adequate 

air supply is maintained and to alert 

wearers of potential hazards.

SHUTTING DOWN 

PROCEDURE

REMOVE BREATHING 

APPARATUS

All wearers must remove breathing 

apparatus in accordance with the 

manufacturer’s instructions.

ISOLATE/BLEED SUPPLY

Isolate the airline supply and release 

pressure within the supply line using 

bleed valve, (if fitted), or by venting 

through the breathing apparatus.

DISCONNECT HOSES/

EQUIPMENT

Disconnect all hoses from equipment. 

Coil all hoses and connect hose end 

couplings for safe storage.

CLEAN, EXAMINE AND 

TEST EQUIPMENT

Clean and test all equipment thoroughly 

and inspect for signs of wear or damage 

in accordance with the manufacturer’s 

instructions. All faults must be rectified 

immediately.

RECORD DETAILS OF USE

A record must be maintained and kept 

detailing the use of airline breathing 

apparatus and associated equipment.
Information recorded usually includes:

Name and address of the employer 

responsible for the equipment.
Particulars of the equipment used, 

including details of the manufacturer, 

model number or mark sufficient to 

enable clear identification.
Date of use and length of time the 

equipment was in use.
Date of the examination together 

with the name, signature or unique 

authentication mark of the examiner.
Condition of the equipment and 

details of any rectification work 

carried out.

Содержание AFU 2

Страница 1: ...AFU 2 AFU 4 2026540 Iss B 03 2018 CE0086 ...

Страница 2: ...nce with these requirements AFU 2 and AFU 4 are only designed to remove water oil and debris from the air supply AFU 2 and AFU 4 WILL NOT remove carbon monoxide CO carbon dioxide CO2 or other toxic gases or fumes from the air supply Ensure that the selection of equipment is sufficient for the tasks being undertaken and the hazards likely to be encountered Please refer to National Regulations for g...

Страница 3: ...st meet the following requirements for use with constant flow apparatus being supplied from a single source No of BA Wearers Supply Pressure bar Airflow L min 1 5 0 9 0 300 500 2 1 Pair 5 0 9 0 600 1000 3 5 0 9 0 900 1500 4 2 Pairs 5 0 9 0 1200 2000 Table 2 Supply Pressure and Flow Constant Flow Apparatus For each additional wearer add a minimum of 300 to 500 litres per minute All measurements mus...

Страница 4: ... psi G This unit can only be used to supply a maximum of 3 wearers of demand valve fed apparatus or 2 wearers of constant flow apparatus AFU 4 has a maximum flow capacity of 25 litres per second 53 cubic feet per minute at 7 Bar G 100 psi G This will allow up to 6 wearers 3 pairs of demand valve fed apparatus or 4 wearers 2 pairs of constant flow apparatus These units are available either mounted ...

Страница 5: ...fitted to a central yoke The housings may be removed by hand to facilitate quick and easy replacement of filter elements The element should be changed as per our recommendations The recommended frequency of filter element replacement is as follows Filter Element Replace After First Stage AO Filter Maximum 6000 hours use OR Every 12 months Second Stage AA Filter Maximum 6000 hours use OR Every 12 m...

Страница 6: ...During use the airline supply equipment must be under constant supervision in order to ensure that an adequate air supply is maintained and to alert wearers of potential hazards SHUTTING DOWN PROCEDURE REMOVE BREATHING APPARATUS All wearers must remove breathing apparatus in accordance with the manufacturer s instructions ISOLATE BLEED SUPPLY Isolate the airline supply and release pressure within ...

Страница 7: ...umbers on the spare parts list contained in Section Spare Parts of this manual For part number information please refer to Section Spare Parts of this manual The first and second stage filter elements will operate indefinitely when only removing liquids from the supply However the build up of solid contaminants becoming trapped will lead to a pressure drop across the filter element indicated by th...

Страница 8: ...ded maximum service life of 1000 hours or 2 months whichever is sooner The pressure differential will not increase during this time but the odour of oil within the air will become more prevalent Isolate the AFU from compressed air supply Depress vent valve drain at the bottom of housing to de pressurise Unscrew upper housing anti clockwise from yoke a warning whistle will sound if the housing has ...

Страница 9: ...ge AC filter element complete with O Rings Note For all other component details please refer to Service Manual AFU 4 Item No Article No Description 1 2026216 First stage AO filter element complete with O Rings 2 2026217 Second stage AA filter element complete with O RIngs 3 2026219 Third stage AC filter element complete with O Rings Note For all other component details please refer to Service Manu...

Страница 10: ...695 711775 Scott Safety Pimbo Road West Pimbo Skelmersdale Lancashire WN8 9RA England 2018 Scott Safety All rights reserved SCOTT the SCOTT SAFETY Logo Scott Health and Safety AFU 2 AFU 4 are registered and or unregistered marks of Scott Technologies Inc or its affiliates English GB ...

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