Amerex 18764 - Manual (Page 8)

Manual 18764 Rev - Page 8
9. Inspect valve assembly for corrosion or damage to hose thread connection.
10. Reconnect the hose to the agent cylinder. Properly coil the hose on the rack and install the nozzle
(with the lever in a closed position) on the mount.
Note: When assembling the hose to the agent cylinder or nozzle to the hose, tighten the coupling ¼ turn
after contacting the hose gasket.
11. Check all mounting bolts and fixtures.
12. Remove the 10 cubic inch nitrogen cartridge from the manual actuator. The cartridge has a pressure
gauge located on the bottom. Confirm that the needle is in the operating range (green pie area). Check
the cartridge for corrosion, dents, and defects. If you find any defects replace the cartridge. If no defects
are found return the cartridge to the manual actuator.
13. Install new tamper seal and record service data on the extinguisher inspection tag.
14. Return the Model 781 or 783 to its proper location if it has been removed for service.
COMPLETE MAINTENANCE (SIX YEAR TEARDOWN)
COMPLETE MAINTENANCE (SIX YEAR TEARDOWN). Every six years, stored pressure extinguishers
that require a 12 year hydrostatic test shall be emptied and subjected to the applicable maintenance
procedures.
1. Discharge chemical and pressure into a “closed” dry chemical recovery system. These recovery
systems are currently used by the US Military for recharge.
(Make sure that the extinguisher is completely empty and depressurized).
Note: A “closed” recovery system is designed to prevent loss of the chemical “fines”. Loss of the
“fines” could result in reduced extinguisher efficiency.
2. Clean extinguisher to remove dirt, grease or foreign material. Check to make sure that the instruction
nameplate is 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 (480 PSI), using the proof pressure method, in accordance with CGA
Pamphlet C-6 and NFPA 10.
Note: When cleaning, avoid use of solvents around the pressure gauge. They could seriously
damage the plastic gauge face.
3. Inspect the extinguisher for damaged, missing or substitute parts. Only factory replacement parts are
approved for use on Amerex fire extinguishers.
4. Check the date of manufacture on the extinguisher cylinder dome. Cylinder must be hydrostatically
(proof pressure) tested every 12 years to the test pressure indicated on the nameplate (480 PSI).
5. Visually inspect the pressure gauge - if bent, damaged or improper type or pressure it must be
replaced.
6. Remove Ring (Safety) pin from the manual actuator and discharge nozzle checking for freedom of
movement. Replace if bent or if removal appears difficult.