Amerex 05607 - Manual (Page 4)

3
RECHARGING PROCEDURE
1. Complete the “Maintenance-Service Procedure”, items 1 thru 11.
2. Discharge all remaining pressure and AFFF or FFFP solution.
3. Remove the valve assembly and disassemble by removing downtube assembly, spring and
valve stem from the valve assembly. Remove the collar o-ring from the valve assembly.
Remove collar o-ring from the valve and plastic fill tube from the cylinder.
4. Thoroughly rinse all parts with clean water and wipe dry with a soft cloth. Inspect the valve
components and collar o-ring and valve stem. 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. Rinse the cylinder with clean water and inspect the interior following CGA Visual Inspection
Standard C-6.
6. Firmly replace the plastic fill tube. On an accurate scale:
a. Model 250 2-1/2 gal. AFFF Premix
1. Fill cylinder with 2.43 gals. (9.20 liters) (20.24 lbs. [9.18 kg]) of clean tap or distilled
water. Continue with steps b2. And b3.
b. Model 254 6 Liter AFFF Premix
1. Fill cylinder with 1.52 gals. (5.75 liters) (12.65 lbs. [5.74 kg]) of clean tap or distilled
water.
2. Slowly add an Amerex 502 AFFF charge to the water. The liquid level should now be
close to the bottom of the fill tube.
3. If necessary add water very slowly to bring the liquid to this level.
c. Model 252 2-1/2 gal. FFFP Premix
1. Fill cylinder with 2.2 gals. (8.33 liters) (18.32 lbs. [8.31 kg]) of clean tap water or distilled
water.
2. Slowly add an Amerex Model 504 FFFP charge to the water. The liquid level should
now be close to the bottom of the fill tube.
3. If necessary add water very slowly to bring the liquid to this level.
7. Install a “Verification of Service” collar around neck of cylinder. Install valve assembly to the
cylinder and properly align. Shake the extinguisher to assure a thorough mix of the foam
solution. 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 02141 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 swive
l nut lightly with a 15/16” wrench.
Install in hose clip.