Amerex 13259 - Manual (Page 3)

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RECHARGE
RECHARGING (NFPA-10) The replacement of the extinguishing agent and includes the expellant for this type of extinguisher.
WARNING:
a. Before attempting to recharge be sure this extinguisher is completely depressurized.
b. Use a regulated nitrogen pressurizing source. Set the regulator no more than 25 psi (172 kPa) higher
than the gauge operating pressure.
c. 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.
d. 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.
RECHARGING PROCEDURE
1. Complete the “Maintenance-Service Procedure”, items 1 thru 10.
2. Discharge all remaining pressure and wet chemical solution, making sure that there is no remaining pressure. Do not
top off or reuse wet chemical.
3. Remove the valve assembly and disassemble by removing downtube assembly (use a wrench on the brass retainer,
not the plastic tube), spring and valve stem from the valve assembly. Remove the collar o-ring from the valve
assembly.
4. Thoroughly rinse all parts with clean water and wipe dry with a soft cloth. Blow the valve out with air or nitrogen.
Inspect the collar o-ring, valve stem and spring – replace parts if worn or damaged. Lubricate the collar o-ring and
small o-ring on the valve stem with Visilox V-711 (do not lubricate the valve stem seal). Inspect the downtube. If it is
cracked or deformed replace with proper downtube (see Parts List). Inspect downtube o-ring, replace if necessary.
5. Remove fill tube. Rinse the cylinder with clean water and inspect the interior following CGA Visual Inspection
Standard, Pamphlet C-6. Replace fill tube.
6. Model B260 (6 liter) – Recharge using the Model 530-2 Liquid Charge following the instructions on the package.
Model B262 (2½ Gallon) – Recharge using the Model 660 Liquid Charge following the instructions on the package.
7. Install a “Verification of Service” collar around neck of cylinder. Install valve assembly to the cylinder and properly
align.
CAUTION: HAND TIGHTEN THE VALVE COLLAR NUT 100-125 IN LBS. MAX. (1.15-1.44 KG/M).
OVER-TIGHTENING WITH A WRENCH WILL DAMAGE THE VALVE.
8. Install a P/N 09492 Fill (Pressurizing) Adapter on the valve outlet (where the hose assembly attaches) and pressurize
with nitrogen to 100 psi (690 kPa). The pressure regulator should be set to no more than 125 psi (862 kPa).
Remove Fill Adapter.
9. Check the collar, gauge, cylinder welds and valve orifice for leaks using a leak detection fluid or a solution of soapy
water. Remove leak detection fluid from the valve assembly by blowing out with air and wipe exterior of the
extinguisher to dry.
10. Install hose assembly into the operating valve. Torque swivel nut lightly with a 15/16” wrench. Install in hose clip.
11. Install ring pin with ring facing front of the extinguisher. Install new tamper seal. Record recharge date and attach
new recharge tag.
12. Weigh assembled extinguisher and confirm that the total weight is within the allowable tolerances indicated in the
Maintenance section on the extinguisher nameplate (label).