Amerex 05617 - Manual (Page 8)

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 thru 12 of the “COMPLETE MAINTENANCE (SIX YEAR TEARDOWN)” section.
2. Remove downtube, spring and valve stem assembly from the operating valve and thoroughly clean all parts
with a soft bristle brush or soft cloth. Blow the valve and downtube out with air or nitrogen. Inspect the collar
o-ring, valve stem, spring and downtube ass’y - 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).
3. Reassemble the valve assembly, including downtube and set aside.
4. Remove agent fill cap and place to the side. 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, Pamphlet C-6.
6. Clean cylinder collar o-ring seat and collar threads with a small brush and then wipe off surfaces with a
clean damp cloth to remove dust. Lightly brush the collar o-ring seat with Visilox V-711. Install operating
valve/downtube assembly HAND TIGHT.
7. Stand the extinguisher upright on an accurate scale of sufficient size and capacity (1000 lb. minimum). Fill
cylinder through chemical agent fill hole 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.
WARNING: FILLING BY EYE ALONE COULD CAUSE POTENTIALLY DANGEROUS OVER-FILLING -
ALWAYS USE A SCALE.
8. Remove agent fill cap 0-ring. Clean cap and cylinder threads with a small brush and wipe sufaces with
a clean damp cloth to remove dust. Inspect o-ring and replace if damaged or deformed. Install o-ring
and lightly brush it and all threads with Visilox V-711. Install agent fill cap HAND TIGHT.
9. Attach the nitrogen charging adapter to the male hose connector on the operating valve.
10. With the extinguisher properly secured in an upright position, connect your nitrogen pressurizing line with
a quick connect to the nitrogen charging adapter. Rotate the extinguisher operating valve lever to the
OPEN position and pressurize extinguisher with dry nitrogen to 350 psi. When the desired pressure has
been reached, rotate the operating lever to the CLOSED position. Shut off nitrogen supply and remove the
quick connect.
CAUTION: PRESSURIZING THE EXTINGUISHER IN THIS MANNER WILL ALLOW FOR PROPER AERA -
TION OF THE CHEMICAL THROUGH THE DOWNTUBE. DO NOT USE THE “BLEEDER” VALVE
TO PRESSURIZE THE EXTINGUISHER.
11. Remove the nitrogen charging adapter. Check extinguisher for leaks by applying leak detecting fluid or a
solution of soapy water to the male hose connector orifice, around the collar o-ring sealing areas of valve
and fill cap, cylinder welds and gauge. Remove leak detecting fluid from valve assembly by blowing out with
air or nitrogen. Wipe exterior of extinguisher to remove any remaining residue.
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