Product Manual

ManualsBrandsAmerex ManualsFire Fighting Equipment250 lbs Wheeled Copper Fire Extinguisher (Class D)

PN 05618 04/2020

5. When the proper weight is reached, move the “T” handle on the cylinder valve to the closed position. Shut

off CO2 pump and vent supply line.

6. Remove the CO2 supply line, and recharge adapter from the cylinder valve.

7. Check for leaks using leak detection fluid or a solution of soapy water. If any leaks occur, refer to the

Troubleshooting Guide.

8. Install pull pin and tamper seal(s) on cylinder valve(s). Attach new recharge tag.

9. Install cylinder(s) to the carriage and properly secure.

10. Attach the hose and horn assembly to the cylinder valve. Install hose and horn assembly on carriage.

CAUTION: THE MODEL 334 AND 335 EXTINGUISHERS HAVE TWO 50-LB. CYLINDERS

MANIFOLDED TO A COMMON DISCHARGE HOSE. PROPERLY ALIGN THE

CYLINDERS, THEN ATTACH MANIFOLD HOSES WITH MANIFOLD AND DISCHARGE

HOSE AND HORN ASSEMBLY TO THE CYLINDER VALVES.

11. Weigh assembled extinguisher, and confirm that the total weight is within the allowable tolerances

indicated on the pictogram operating instructions (plus weight of cylinder[s] stamped on cylinder valve[s]).

TROUBLESHOOTING GUIDE

WARNING: Before attempting to correct any leakage problem, be sure that the agent cylinder and

hose are completely depressurized. Check to determine the source of a leak before the

extinguisher is depressurized. Leakage repairs will require depressurization and

removal of the valve assembly. Depressurize by discharging into a Closed Recovery

System or inverting the extinguisher. After depressurizing the extinguisher and

correcting the problem, it will be necessary to clean all valve parts thoroughly.

PROBLEM CORRECTIVE ACTION

Leak at valve to cylinder

connection

Remove valve assembly, install new Teflon sealing tape, reinstall

valve to a maximum of 150 ft. lbs. torque.

Leak through valve

Remove valve assembly, downtube, spring, and valve stem

assembly. Install NEW valve stem assembly. Check valve seat for

scratches or foreign matter.

Leak at safety relief nut

Remove safety nut, disc, and gasket assembly. Replace with new

Amerex PN 04000 safety nut, disc, and gasket assembly. Tighten

assembly to 250 in. lbs. of torque.

Leak at base of “T” handle

on valve.

Remove valve assembly, downtube, spring, and valve cylinder stem

assembly. Install new valve stem assembly. Check valve seat for

scratches or foreign matter.

Leak at any hose

connections

Tighten hose connections, and check for hose coupling damage.

Replace hose assembly as necessary.

6. Leak in the cylinder

Contact Amerex if under warranty, otherwise mark “REJECTED” and

return to owner.

NOTE: When valve removal is performed at hydrotest, the cylinder neck threads must be examined

per CGA C-6. “Cylinders shall be rejected if the required number of effective threads is materially

reduced so that a gas-tight seal cannot be obtained by reasonable valving methods. Common

defects are worn or corroded crests and broken or nicked threads.

FOR REPLACEMENT PARTS SEE THE AMEREX PORTABLE AND WHEELED

PARTS BOOK PN 27277 AVAILABLE AT http://www.amerex-fire.com UNDER

MANUALS OF THE RESOURCE SELECTION.