PN 16303
04/2020
12. 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.
RECHARGE
WARNING:
a.
Before attempting to disassemble, be sure the extinguisher is completely depressurized.
b.
Use a regulated nitrogen pressurizing source. Set the regulator no more than 125 psi (862 kPa).
c.
Check and calibrate regulator gauge at frequent intervals. The regulator gauge shall be used to
determine when the intended charging pressure has been reached. Do not use the extinguisher 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.
Perform steps 1 through 10 of the "Maintenance
-
Service Procedure" section.
2.
Discharge all remaining pressure and contents, making sure that there is no remaining pressure. Do not
top off or reuse water.
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 assembly. Remove the collar O
-
ring from the
valve and plastic fill tube from the cylinder.
4.
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 V
-
711 (do not lubricate the valve stem seal). Inspect the downtube.If it is cracked or deformed
replace with proper downtube. Inspect downtube O
-
ring, replace if necessary.
5.
Rinse the cylinder with clean water and inspect the interior following CGA Visual Inspection Standard C
-
6.
6.
Firmly replace the plastic fill tube and fill cylinder with DE
-
IONIZED WATER to the bottom of the fill tube.
(Model B270 1.8 U.S. gals./6.81 liters Amerex Charge 670)(Model B272 2
-
½ U.S. gals/9½ liters Amerex
Charge 671).
NOTE: THE USE OF DE
-
IONIZED WATER CONFORMING TO NFPA 10 IS REQUIRED.
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 PN 09492 Fill Adapter (High Performance) to the male valve outlet (where the hose assembly
attached) and pressurize with nitrogen to 100 psi (690 kPa).The pressure regulator shall be set to no more
than 125 psi (862 kPa). Remove Fill Adapter.
CAUTION: DO NOT USE COMPRESSED AIR TO PRESSURIZE THIS EXTINGUISHER.
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 house and wand assembly into the operating valve.
NOTE: CAREFULLY POSITION THE HOSE TO A NATURAL ANGLE BEFORE TIGHTENING THE
HOSE FEMALE SWIVEL NUT. TORQUE SWIVEL NUT LIGHTLY USING 15/16" WRENCH.
INSTALL IN HOSE CLIPS.
