10
nameplate. Ensure the O seal seats correctly. Firmly hand tight collar onto the cylinder (max force
20-30Nm / 15-22 ft lbs.) to hold valve firmly in place. Attach the charging adapter hand tight into
the valve assembly thread.
8. With the extinguisher properly secured in an upright position, connect your nitrogen pressurizing
line with a quick connect to the charging adapter. Depress the extinguisher operating lever and
pressurize extinguisher to the proper operating pressure. When the desired pressure has been
reached, release the lever. Shut off nitrogen supply and remove the quick connect.
9. Check extinguisher for leaks by applying detecting fluid or a solution of soapy water to the
charging adapter orifice, around the collar O-ring sealing area, cylinder welds and gauge.
Remove the charging adapter. Blow nitrogen into the interior of the valve assembly to remove
any remaining leak detecting fluid. Wipe exterior of extinguisher to remove any remaining
residue.
10. Install hose /wand assembly. Ensure coupling is firmly tightened into valve and place lance inside
two loops on the straps at the top and bottom of the cylinder. See appendix A for image.
11. Install ring pin through handle, lever and valve with ring facing the front of the extinguisher
(gauge side).
12. Install new tamper seal wrapping through loop and around levers to secure ring pin. Do not over
stress tamper seal.
13. Weigh assembled extinguisher and confirm that the total weight is within the allowable tolerances
indicated in the Maintenance section of the nameplate (label).
14.
After completing the maintenance examination, properly tag, label, and record the procedure in
accordance with NFPA-10 and any local requirements
15. Replace the extinguisher on the wall hanger or in the vehicle bracket making sure that it fits the
bracket properly and the bracket is securely attached – replace the bracket if necessary
TROUBLESHOOTING GUIDE
WARNING
To avoid risk of injury of death, should any audible pressure leak be observed during disassembly of
the extinguisher, then technicians should stop service activities and wait until all residual pressure is
released.
LEAKAGE
Determine the source of a leak before the extinguisher is depressurized. The extinguisher must be
completely depressurized before any attempt is made to de-valve it and correct a leakage problem.
DEPRESSURIZE
Hold the extinguisher in an inverted position and slowly squeeze the discharge handle. Some water
remaining in the dip tube will be expelled so care should be taken in the area being used for
depressurizing. Thoroughly clean all valve parts after depressurization and valve removal.
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