Product Manual

PN 14425 04/2020
MAINTENANCE
Extinguishers shall be subjected to maintenance at intervals of not more than 1 year or when specifically
indicated by an inspection or by electronic notification. Maintenance procedures include a thorough
examination of the basic elements of a fire extinguisher:
1. Mechanical parts
2. Extinguishing agent of cartridge-operated extinguishers, pump tanks, and certain types of stored-pressure
extinguishers
3. Expelling means
NOTE: Stored-pressure Halotron I extinguishers do not require an internal examination of the cylinder or
examination of the agent during annual maintenance, but shall receive a thorough external
examination.
Maintenance is a thorough examination of the fire extinguisher. It is intended to give maximum assurance that
a fire extinguisher will operate effectively and safely. It includes a thorough examination for physical damage
or condition to prevent its operation and any necessary repair or replacement. It will normally reveal the need
for hydrostatic testing.
MAINTENANCE/SERVICE PROCEDURE
1. Clean extinguisher to remove dirt, grease, or foreign material. Check to make sure that the instruction
nameplate and UL manifest are securely fastened and legible. Inspect the cylinder for corrosion, abrasion,
dents, or weld damage. If any of these conditions are found and you doubt the integrity of the cylinder,
hydrostatically test to factory test pressure, using the proof pressure method in accordance with CGA C-1
and NFPA 10.
NOTE: When cleaning avoid use of solvents around the pressure gauge. They could seriously damage
the plastic gauge face.
2. Inspect the extinguisher for damaged, missing, or substitute parts. Only factory replacement parts are
approved for use on Amerex fire extinguishers.
3. Weigh extinguisher and compare with weight printed in the Maintenance section on the nameplate.
Recharge extinguisher if weight is not within indicated allowable tolerances.
4. Check the date of manufacture on the extinguisher nameplate. Cylinder must be hydrostatically (proof
pressure) tested every 12 years to the test pressure indicated on the nameplate. Check the last date
complete maintenance was performed. Per NFPA 10 these extinguishers shall be emptied and subject to
complete maintenance every 6 years. All maintenance/service and recharge procedures shall be done at
that time.
5. Visually inspect the pressure gauge:
a) If bent, damaged, or improper gauge, depressurize and replace.
b) If pressure is low, check for leaks,
c) If pressure is low or high and temperature/pressure relationship has been ruled out:
1. Low pressure— check for leaks. Follow procedure for reclaiming Halotron I agent, install
necessary part(s) to repair leak, and recharge according to instructions.
2. High pressure (over pressurized or over charged) — depressurize and recharge
extinguisher following instructions in Recharge section.
6. Remove nozzle or hose and nozzle assembly, and inspect for damage. Blow air through nozzle or hose
and nozzle to insure that passage is clear of foreign material. Replace component parts with proper
Amerex part as necessary.
7. Check pull pin for freedom of movement by breaking the tamper seal and removing the pin. Replace the
pull pin if bent or if removal is difficult.
8. Inspect discharge lever for dirt or corrosion that might impair freedom of movement. Inspect carrying
handle for proper installation. If lever, handle, or rivets are damaged or distorted, replace with proper
Amerex part(s).