Amerex 05620 - Manual (Page 7)

1. TO DEPRESSURIZE:
a) Close the Argon cylinder valve.
b) Carefully tip extinguisher over until it rests on both wheels and handle. (in this position much of the agent will
remain in the cylinder.)
c) Open the nozzle lever slowly to discharge all remaining agent and pressure. (be prepared for a nozzle recoil).
d) Insure that all pressure has escaped before further disassembly.
e) Return extinguisher to the upright position after complete depressurization.
2. Carefully remove the fill cap. Detach discharge hose from the agent cylinder and the nozzle assembly from the
hose. Blow out any chemical agent remaining in the hose. Clean hose and container fittings and gaskets.
Replace gaskets as necessary.
3. Inspect the cylinder interior following CGA Visual Inspection Standard, Pamphlet C-6.
4. Perform MAINTENANCE-SERVICE PROCEDURES 1 through 3, 6 and 7. All parts should be inspected, clean
and replaced if necessary.
5. Detach hose from the Argon cylinder, install the shipping cap, unscrew the wing nuts and remove the Argon
cylinder from the extinguisher
6. Fill the agent cylinder with the proper amount of Amerex Class D Powder (Model 680 – capacity 150 lbs., Super
D [Sodium Chloride] or Model 681 – capacity 250 lbs. Copper). Lubricate the fill cap gasket. Install the fill cap
and tighten securely.
WARNING: REPLACE ANY CHEMICAL THAT IS CONTAMINATED OR CAKED. DO NOT OVERFILL THE
EXTINGUISHER - THIS COULD CAUSE MALFUNCTION. NEVER MIX TYPES OF AGENTS.
7. Install an Amerex P/N 10904 110 cu. ft. ARGON cylinder (pressurized to 2015 psi), remove the shipping cap,
place on the extinguisher and attach the Argon hose. The Ring (safety) Pin and tamper indicator (lockwire seal)
[“T” handle valve] or lead wire seal [handwheel valve] must be in place.
8. Reattach the hose to the extinguisher (tighten hand tight plus a ¼ turn). Properly coil the hose onto the storage
rack. Reattach the shutoff nozzle (and/or Extension Wand) firmly to the hose and store it in the mount with the
shutoff lever in the CLOSED (forward) position.
9. Record the service date on the inspection tag and place the extinguisher in its proper location.
TROUBLESHOOTING GUIDE
WARNING: BEFORE ATTEMPTING TO CORRECT ANY LEAKAGE PROBLEM, BE SURE THAT THE AGENT CYLINDER
IS COMPLETELY DEPRESSURIZED. ALWAYS USE CAUTION WHEN OPENING THE SHUTOFF NOZZLE,
AGENT CLINDER CAP OR ANY OTHER CONNECTION AS A LEAKING ARGON VALVE SEAT MAY HAVE
PRESSURIZED THE AGENT CONTAINER. REFER TO THE PREVIOUS PAGE IN THE RECHARGE PROCE-
DURE FOR PROPER METHOD OF DEPRESSURIZATION.
PROBLEM CORRECTIVE ACTION
1. Argon cylinder gauge reads low or high. 1. Temperature may have affected the pressure reading.
Temp. F 35° 70° 120°
Temp. C 2° 21° 49°
Recommended Pressure
psig
1880 2015 2200
mPa 13.0 13.9 15.2
Minimum Pressure
psig
1590 1700
1900
mPa 11.0 11.7 13.1
No corrective action is required if the pressure is within
parameters stated above.