Amerex 08220 - Manual (Page 8)

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the extinguisher with argon to 195 psi (1345 kPa). When the desired pressure has been
reached, release the operating lever. Shut off Argon supply and remove the quick connect.
10.
Remove the charging adapter. Check extinguisher for leaks by applying leak detecting fluid or a
solution of soapy water to the valve discharge orifice, around the collar o-ring sealing area,
cylinder welds and gauge. Remove leak detecting fluid from valve assembly by blowing out with
air or argon. Wipe exterior of extinguisher to remove any remaining residue.
11.
Install the hose assembly to the operating valve. Reconnect the female swivel on the extension
applicator to the male swivel on the hose. Rotate the hose assembly several times to verify that
the swivel operates freely. Disconnect and clean the inside of the swivel female with a small
brush and compressed air if rotation is impeded. Install hose and extension applicator
according to instructions on page 9.
12.
Install ring pin and tamper seal. Record recharge date and attach new recharge tag.
13.
Weigh assembled extinguisher and confirm that the total weight is within the allowable
tolerances indicated in the "Maintenance" section of the nameplate (label).
COMPLETE MAINTENANCE (SIX YEAR TEARDOWN)
Complete Maintenance (Six Year Teardown) [NFPA-10] Every six years, stored pressure
extinguishers that require a 12 year hydrostatic test shall be emptied and subjected to the applicable
maintenance procedures. When the applicable maintenance procedures are performed during periodic
recharging or hydrostatic testing, the six year requirement shall begin from that date.
Note: some states require Complete Maintenance on an Annual Basis. Check with your
Amerex servicing distributor to see if this applies to you. NFPA-10 requires that a
"verification of service" external collar tag be installed on the extinguisher whenever "Six
Year Maintenance" is performed. The "verification of service" tag can only be installed if
the operating valve has been removed. A "Six Year Maintenance" service decal must
also be attached to the extinguisher cylinder.
COMPLETE MAINTENANCE (SIX YEAR TEARDOWN) PROCEDURE
1. Discharge powder and pressure into a "closed" dry powder recovery system (several are
commercially available). Make sure that the extinguisher is completely empty and depressurized.
CAUTION: Do not contaminate by mixing with other types of dry powder or dry chemical.
2. Perform all required maintenance in Steps 1 through 8 of "Maintenance Procedure" (Annual).
3. VERIFY THAT NO PRESSURE REMAINS IN THE EXTINGUISHER (slowly squeeze discharge
lever, aiming away from persons or objects which might be injured or damaged), Remove the valve
assembly from the cylinder and inspect it for signs of corrosion or damage to the threads. Replace
parts as necessary.
4. Disassemble valve assembly by removing the downtube, spring and valve stem assembly.
Remove the collar o-ring from the valve assembly.
5. Complete steps 2 through 13 of Recharge Procedure.