Amerex 05616 - Manual (Page 7)

6
RECHARGE
WARNING:
a. Before attempting to disassemble, be sure the extinguisher is
completely depressurized.
b. Never have any part of your body over the extinguisher while removing
the valve assembly.
c. Use a protective shield between you and the pressure gauge while
charging an extinguisher. Do not stand in front of the gauge if a shield
is not available.
d. Use a regulated pressurizing source of dry nitrogen only with a
minimum dew point of minus 70ºF (minus 57ºC). Set the regulator to no
more than 265 psi (1827 kPa).
e. Check and calibrate regulator gauge at frequent intervals. The regulator
gauge should be used to determine when the intended charging
pressure has been reached. Do not use the extinguisher gauge for this
purpose.
f. Never leave an extinguisher connected to a regulator of a high pressure
source for an extended period of time. A defective regulator could
cause the cylinder to rupture due to excessive pressure.
g. Do not mix types of dry chemicals in extinguishers, recharge or recovery
systems. Mixing ABC (acidic base) with Regular, Purple-K, Super-K or
Monnex (alkaline base) dry chemicals may result in a chemical reaction
capable of developing a dangerous pressure buildup.
RECHARGING PROCEDURE
1. Perform steps 1 through 12 of the "Complete Maintenance (Six Year Teardown)" section.
2. Thoroughly clean all parts of the disassembled valve with a soft bristle brush or soft cloth.
Blow the valve out with air or nitrogen. Inspect the spring and downtube assembly, and
replace parts if worn or damaged. Replace the valve stem and collar o-ring. Lubricate the
collar o-ring and small o-ring on the valve stem with Visilox V-711 (do not lubricate the valve
stem seal).
3. Reassemble the valve assembly, including downtube and set aside.
4. Remove any chemical remaining in the cylinder and check the condition. Properly dispose
of any chemical that is contaminated or caked.
5. Inspect the cylinder interior following CGA Visual Inspection Standard C-6.
6. Using an accurate scale, fill cylinder with the correct amount and type of dry chemical
specified on the label (nameplate). Use Amerex chemical which has been kept free of
moisture and contamination. See Warning (g)
– DO NOT MIX TYPES OF CHEMICALS.
7. Clean cylinder collar o-ring seat and collar threads with a small brush and then wipe off
surfaces with a clean cloth to remove dust. Lightly brush the collar o-ring seat with Visilox
V-711.
8. Carefully center the downtube and install valve assembly hand tight to the cylinder (the
bottom of the valve body should touch the top of the cylinder collar). Attach the nitrogen
charging adapter to the male hose connector. Valve installation can be made easier by
tapping the sidewall of the cylinder with a rubber mallet as the downtube is eased into the
cylinder.
9. With the extinguisher properly secured in an upright position, connect your nitrogen
pressurizing line with a quick connect to the nitrogen charging adapter. Pressurize