Amerex 16672 - Manual (Page 6)

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5. Visually inspect the pressure gauge:
a. if bent, damaged or improper gauge, depressurize and replace
b. if pressure is low or high and temperature/pressure relationship has been ruled out:
1. low pressure – check for leaks
2. high pressure (over pressurized or over charged) depressurize and recharge extinguisher
following instructions listed below
6. Remove and check ring pin for freedom of movement. Replace if bent or if removal appears difficult.
7. Check the nozzle shutoff lever for freedom of movement (open and close several times). If the opera-
tion is impeded, replace ball valve assembly. Make sure that the nozzle tip is clear and unobstructed.
WARNING: ALWAYS OPEN THE SHUTOFF NOZZLE HANDLE SLOWLY. BE PREPARED
FOR A POSSIBLE DISCHARGE AND NOZZLE RECOIL.
8. After making sure that there is no residual pressure in the discharge hose, disconnect it from the cylin-
der operating valve. Blow air through the hose and nozzle assembly to insure that the passage is clear
of foreign material. Check the couplings, hose and hose gasket for damage or deterioration – replace
as necessary.
9. Inspect valve assembly for corrosion or damage to hose thread connection. Valve removal and/or valve
part replacement should be made only after following the depressurizing and recovery procedures listed
in the Complete Maintenance procedures.
10. Inspect the wheels to insure they rotate freely. Lubricate as required
11. Check carriage assembly for loose nuts, bolts, frame distortion or damage. Check welds for damage or
corrosion. Replace damaged parts or make repairs as necessary.
12. 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.
13. Install new tamper seal and record service data on the extinguisher inspection tag.
14. If the extinguisher has been moved to perform service, make sure that it is returned to its proper loca-
tion.
COMPLETE MAINTENANCE (SIX YEAR MAINTENANCE)
WARNING
a. Before attempting to devalve the extinguisher for maintenance, hydrotest or recharging be sure
that it is completely depressurized. Recover agent and vapor according to the instructions be-
low.
b. Never have any part of your body over the extinguisher while removing the valve assembly.
c. Prolonged exposure of a devalved cylinder to ambient air should be avoided to prevent moisture
contamination and cylinder rusting.
Six Year Maintenance (NFPA 10) . Every 6 years, stored pressure fire 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 the periodic recharging or hydro-
testing, the 6– year requirement shall begin from that date.