Amerex 16303 - Manual (Page 3)

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4. Check the date of manufacture printed on the extinguisher label (nameplate) or on the agent
cylinder dome. The agent cylinder must be hydrostatically tested every 5 years to the test
pressure indicated on the nameplate. REPLACE EXTINGUISHING AGENT WITH NEW
AMEREX CHARGE AT TIME OF HYDROTEST.
5. Visually inspect the pressure gauge:
a. If bent, damaged or improper gauge, depressurize and replace.
b. If pressure is low, check for leaks.
c. If over pressurized (overcharged), depressurize the extinguisher and follow recharge
instructions.
6. Check ring pin for freedom of movement. Replace if bent or if removal appears difficult.
7. Inspect discharge lever for any dirt or corrosion which might impair freedom of movement.
Inspect carrying handle for proper installation. If lever, handle or rivets are damaged replace
with proper Amerex part(s).
8. Install new tamper seal if broken and record service data on the extinguisher inspection tag.
9. Remove hose & wand assembly, inspect for damage, replace as necessary. Blow air through
nozzle or hose and horn to insure passage is clear of foreign material.
10. Inspect the valve assembly for corrosion or damage to hose thread connection. Replace valve
assembly or component parts as necessary following the proper depressurization and recharge
procedures. If valve removal is necessary, complete all steps in the Recharge Procedure.
11. Install hose & wand assembly. Torque swivel nut lightly with 15/16" wrench.
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 should
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.