NORFOLK RANGE WHEELED EXTINGUISHER SERVICING ... - FIA

NORFOLK RANGE
WHEELED
EXTINGUISHER
SERVICING &
MAINTENANCE
INSTRUCTIONS

SPINTRO REV 3: February 2002
PROCEDURES FOR SERVICING THE BRITANNIA RANGE OF HAND PORTABLE
FIRE EXTINGUISHERS AND THE NORFOLK RANGE OF WHEELED FIRE
EXTINGUISHERS
Introduction
The servicing of fire fighting equipment must be carried out by a competent person using
the correct tools to follow the applicable procedures of BS 5306, part 3, 2000 and the
manufacturers instructions.
This maintenance should be performed at least annually. The extinguishers should be
visually inspected at least quarterly, but preferably monthly, by the user, to ensure that
the equipment is in it’s designated position, has not been used and has not been
tampered with.
Servicing and recharging should be carried out in a clean dry environment. All recharge
materials and spare parts must be as specified by the manufacturer.
In the event that an extinguisher cannot immediately be rendered suitable for continued
service, it must be marked 'unfit for service' until it can be repaired/recharged.
The competent person must advise the user of any equipment, which is either
condemned or unfit for service and make any recommendations for replacement and/or
remedial work.
If the extinguisher is to be sited in a hazardous/corrosive environment i.e. marine use,
the inspection periods should be more frequent. The effects of the environment should
be considered, with particular reference to corrosion and legibility of marking
instructions. If there is corrosion or the markings are not legible, then the extinguisher
should be withdrawn from service.
It is essential that extinguishers are not subjected to temperatures outside of the
temperature range stated on the extinguisher.
Extinguishers should remain in their allocated location, and should be used only for the
purposes of extinguishing a fire. On no account should the extinguisher be removed for
any other purpose, and should not be subjected to any impact, force, heat, abrasion or
any other misuse or condition that may be detrimental to the integrity of the extinguisher.

SPNWP REV 1: OCTOBER 1997
SERVICE PROCEDURES FOR NORFOLK RANGE WHEELED
DRY POWDER MODELS
MODEL NO'S: NWS50, NWA50, NWA60, NWS70, NWS100,
NWA100, NWA120, NWS165
1. Inspect the exterior of the extinguisher for damage or corrosion. If found, the
extinguisher should be withdrawn from service.
2. If conditions indicate the extinguisher has been completely or partially discharged,
discontinue servicing procedure and commence recharge procedure (ref. RPNWP).
3. Examine instruction label for wear or damage which may affect legibility, replace if
necessary.
4. Remove the headcap slowly, using nutring spanner, (do not use blunt instrument)
allowing any residual gas to escape through vent holes before complete removal.
5. Examine powder for caking, lumps or contamination. If of poor quality empty
extinguisher and recharge. (Do not sieve lumps from powder). Examine discharge
elbow, ensure no blockages (use wire rod if necessary).
6. Examine headcap, nutring and cylinder threads. Ensure vent holes are clear and
check 'O' ring. Replace parts as necessary.
7. Refit headcap, tighten using nutring spanner.
8. Remove C02 Cylinder and check last hydraulic test date, replace if test is due.
Checkweigh the cylinder against the gross weight stamped on cylinder shoulder. If
underweight by more than 10% of contents, remove from service and fit replacement
cylinder.
9. Check condition of discharge hose, discharge lance and C02 hose for damage, wear,
cuts etc. Replace if necessary.
10. Refit C02 cylinder ensuring sealing washer is located correctly, tighten with spanner.
Check wheels for free movement, grease axles if necessary.
11. Fit seal to C02 cylinder hand wheel (in accordance with service colour code). Record
service details on service label.

SPNWF REV 1: OCTOBER 1997
SERVICE PROCEDURES FOR NORFOLK RANGE WHEELED
FOAM MODELS
MODEL NO'S: NWAF45, NWAF135, NWPF45, NWPF135
1. Inspect the exterior of the extinguisher for damage or corrosion. If found, the
extinguisher should be withdrawn from service.
2. If conditions indicate the extinguisher has been completely or partially discharged,
discontinue servicing procedure and commence recharge procedure (ref. RPNWF).
3. Examine instruction label for wear or damage which may affect legibility, replace if
necessary.
4. Remove the headcap slowly, using nutring spanner, allowing any residual gas to
escape through vent holes before complete removal.
5. Check liquid level, examine condition of foam. If of poor quality, empty
extinguisher, rinse with clean water and recharge. Check internal condition for
corrosion or damage, if found withdraw extinguisher from service.
6. Examine headcap, nutring and cylinder threads. Ensure vent holes are clear and
check 'O' ring. Replace parts as necessary.
7. Refit headcap, tighten using nutring spanner.
8. Remove C02 Cylinder and check last hydraulic test date, replace if test is due.
Checkweigh the cylinder against the gross weight stamped on cylinder shoulder. If
underweight by more than 10% of contents, remove from service and fit replacement
cylinder.
9. Check condition of discharge hose, discharge lance and C02 hose for damage, wear,
cuts etc. Replace if necessary.
10. Refit C02 cylinder ensuring sealing washer is located correctly,tighten with spanner.
11. Check wheels for free movement, grease axles if necessary.
12. Fit seal to C02 cylinder hand wheel (in accordance with service colour code). Record
service details on service label.

SPNWC02 REV 1: OCTOBER 1997
SERVICING PROCEDURES FOR NORFOLK RANGE RANGE
STORED PRESSURE CARBON DIOXIDE
(C02) MODELS
MODEL NO'S: NWC9, NWC18T, NWC22, NWC45T, NWC45
WARNING: NEVER DISCHARGE CO2 EXTINGUISHERS WITH NO
DISCHARGE HORN ATTACHED
1. Check exterior of extinguisher for corrosion or damage, if found, withdraw from
service.
2. Ensure safety pin is in position, if fitted and the extinguisher has not been completely
or partially discharged. If the extinguisher has been completely or partially
discharged, discontinue servicing procedure and commence recharge procedure (Ref.
RPC02).
3. Ensure instruction label is legible, rectify as necessary. Check for damage/corrosion
to extinguisher body. If damage/corrosion is found, mark the extinguisher as
condemned and/or remove from service.
4. Checkweigh the extinguisher against the gross weight stamped on cylinder. If
underweight by more than 10% of contents, the extinguisher should be removed from
service and recharged. Alternatively use ultrasonic liquid level device.
5. Check safety pin for free removal. Replace pin and fit new seal (in accordance with
service colour code).
6. Ensure safety pin is in position and remove the horn/hose from the valve. Blow
through horn/hose and check for cracks, abrasion or other damage.
7. Check date of last hydraulic pressure test stamped on cylinder shoulder. If hydraulic
testing is due remove from service.
8. Refit horn/hose, ensuring that sealing washer is present and in good condition.
9. Record service details, including weight on the service label and return to service.

RPNWP REV 1: OCTOBER 1997
RECHARGE PROCEDURE FOR NORFOLK RANGE WHEELED DRY
POWDER MODELS
MODEL NO'S: NWS50, NWA50, NWA60, NWS70, NWS100,
NWA100, NWA120, NWS165
THESE RECHARGE PROCEDURES SHOULD BE USED IF COMPLETE OR
PARTIAL USE OF THE EXTINGUISHER IS SUSPECTED
1. Inspect the exterior of the extinguisher for damage or corrosion, if found, withdraw
the extinguisher from service.
2. Ensure all pressure is released by fully discharging the extinguisher.
3. Remove headcap slowly, using nutring spanner, allowing any residual pressure to
escape through nutring vent holes.
4. Disconnect and remove the C02 cylinder and withdraw for recharging.
5. Invert extinguisher to remove residual powder (rest extinguisher on handle and rock
back and forth).
6. Examine and blow through discharge lance and hose. Check for damage, cuts, kinks
etc. Examine discharge elbow, ensure no blockages (use wire rod if necessary).
7. Fit replacement C02 cylinder, ensuring correct size and weight. Ensure sealing
washer is located before tightening.
8. Refill with new dry powder of the correct type and quantity. Never mix different
types of powder as pressure and moisture may develop as a result of chemical
reaction.
9. Inspect nutring and headcap/'O' ring. Replace parts as necessary. Refit headcap
using nutring spanner.
10. Clean extinguisher and record recharge details on service label.

RPNWF REV 1: OCTOBER 1997
RECHARGE PROCEDURE FOR NORFOLK RANGE
WHEELED FOAM MODELS
MODEL NO'S: NWAF45, NWAF135, NWPF45, NWPF135
THESE RECHARGE PROCEDURES SHOULD BE USED IF COMPLETE OR
PARTIAL USE OF THE EXTINGUISHER IS SUSPECTED
1. Inspect the exterior of the extinguisher for damage or corrosion, if found, withdraw
the extinguisher from service.
2. Ensure all pressure is released by fully discharging the extinguisher.
3. Remove headcap slowly, using nutring spanner, (do not use blunt instrument)
allowing any residual pressure to escape through nutring vent holes.
4. Disconnect and remove the C02 cylinder and withdraw for recharging.
5. Invert extinguisher to remove residual liquid (rest extinguisher on handle and rock
back and forth). Check internal condition for corrosion.
6. Examine and blow through discharge lance and hose. Check for damage, cuts, kinks
etc.
7. Fit replacement C02 cylinder, ensuring correct size and weight. Ensure sealing
washer is located before tightening.
8. Refill with clean water to the correct level allowing for foam concentrate (and antifreeze,
if applicable) and add foam concentrate (and anti-freeze).
9. Inspect nutring and headcap/'O' ring. Replace parts as necessary. Refit headcap
using nutring spanner.
10. Clean extinguisher and record recharge details on service label.