OWNERS SERVICE MANUAL
Contents
1. IN THE SERVICE OF FIRE EXTINGUISHERS AMEREX ASSUMES NO LIABILITY FOR SERVICE MAINTENANCE OR RECHARGE OF FIRE EXTINGUISHERS BY PUBLISHING THIS MANUAL INSPECTING THE EXTINGUISHER This extinguisher should be inspected at regular intervals monthly or more often if circumstances require to insure that it is ready for use INSPECTION NFPA 10 A quick check should be made of the extinguisher for the following 1 Located in designated place No obstructions to access or visibility Operating instructions on nameplate label and facing outward Seals and tamper indicators not broken or missing Determine fullness by weighing or hefting Examine for obvious physical damage corrosion leakage or clogged nozzle Pressure gauge reading in the operable area NOOR wh MAINTENANCE SERVICE PROCEDURE MAINTENANCE NFPA 10 At least once a year or more frequently if indicated by an inspection maintenance should be performed Maintenance is a thorough check of the extinguisher It is intended to give maximum assurance that an extinguisher will operate effectively and safely It includes a thorough examination and any necessary repair or replacement It will normally reveal the need for hydrostatic testing 1 Clean extinguisher to remove dirt grease or foreign material Check to make sure that the instruction nameplate is securely fastened and legible Inspect the cylinder for corrosion abrasion dents or weld damage I2. overcharged depressurize discharge and follow recharging instructions Inspect the footstand base If cracked or broken replace with proper footstand Inspect ring pin for freedom of movement by breaking the seal and removing the pin Replace the ring pin if bent or if removal is difficult Inspect discharge lever for dirt or corrosion that might impair freedom of movement Inspect carrying handle for proper installation If lever handle or rivets are damaged or distorted replace with proper Amerex part s Remove hose assembly inspect hose assembly for damage replace as necessary Blow air through hose assembly to insure passage is clear of foreign material Inspect the valve assembly for corrosion or damage to hose thread connections Replace valve assembly or component parts as necessary following the proper depressurization and recharge procedures Install hose and nozzle assembly Install new tamper seal and record service data on the extinguisher inspection tag Rehang the extinguisher on the wall hanger bracket making sure that it fits the hanger bracket properly replace the bracket if necessary RECHARGE RECHARGING is the replacement of the extinguishing agent and includes the expellant for this type of extinguisher THE FIRE EXTINGUISHING AGENT IN THIS EXTINGUISHER MUST BE COMPLETELY REPLACED EVERY THREE YEARS Use only the Amerex Model 502 AFFF or Model 504 FFFP concentrate charge to retain the UL approval an
3. OWNER S SERVICE MANUAL NO 05607 INSPECTION MAINTENANCE AND RECHARGE WARNING DO NOT USE THESE EXTINGUISHERS ON FIRES INVOLVING ENERGIZED ELECTRICAL EQUIPMENT CLASS C HAZARDS FLAMMABLE METALS CLASS D HAZARDS OR ANY FLAMMABLE THAT WILL REACT WITH WATER PROTECT FROM FREEZING All fire extinguishers should be installed inspected and maintained in accordance with the National Fire Protection Association standard titled Portable Fire Extinguishers NFPA 10 and the requirements of local authorities having jurisdiction When maintenance is indicated it should be performed by trained persons having proper equipment Fire extinguishers are pressure vessels and must be treated with respect and handled with care They are mechanical devices and require periodic maintenance to be sure that they are ready to operate properly and safely Amerex strongly recommends that the maintenance of portable fire extinguishers be done by a trained professional your local authorized Amerex Distributor Amerex Corporation makes original factory parts available to insure proper maintenance use of substitute parts releases Amerex of its warranty obligations Amerex parts have machined surfaces and threads that are manufactured to exacting tolerances O rings hoses nozzles horns and all metal parts meet precise specifications and are subjected to multiple in house inspections and tests for acceptability There are substitute parts available that a
4. d manufacturer s warranty Substitute charges could make the extinguisher less effective WARNING a Before attempting to recharge be sure this extinguisher is completely depressurized b Use a regulated nitrogen pressurizing source Set the regulator no more than 125 psi 862 kPa higher than the gauge operating pressure 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 gauge 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 Complete the Maintenance Service Procedure items 1 thru 11 Discharge all remaining pressure and AFFF or FFFP solution 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 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 pro
5. e valve assembly clean collar knurled nut thoroughly A Leak at collar o ring and install new o ring Lubricate the o ring with Visilox V 711 P N 06247 2 Leak through valve Install new valve stem assembly Check valve seat for scratches or foreign matter Leak around gauge threads Remove gauge and reinstall using Teflon tape on the gauge threads 4 Defective gauge Remove defective gauge and install a new gauge using Teflon tape on the gauge threads 5 Leak in the cylinder Contact Amerex if under warranty otherwise mark Rejected and return to owner 6 Broken footstand Install new footstand see parts list Pressure gauge threads are coated with a special epoxy at the factory For easy removal soak the valve assembly minus the downtube assembly in hot water 180 F 82 C for two to four minutes Remove gauge with a 7 16 open end wrench PARTS LIST For Model 254 6 Liter AFFF Foam Extinguisher Model 250 2 Gallon AFFF Foam Extinguisher Model 252 212 Gallon FFFP Foam Extinguisher 2 ITEM PART STD NO NO DESCRIPTION PKG 1 14345 Valve Assembly 1 2 06978 Hose Gasket O ring 24 3 13162 Hose amp Spray Nozzle Asy 254 1 3A 07000 Hose amp Aspira ed Noz Asy 250 1 06982 Hose amp Aspirated Noz Asy 252 01007 Wall B
6. f any of these conditions are found and you doubt the integrity of the cylinder hydrostatically test using the proof pressure method and a suitable cage in accordance with CGA Pamphlet C 1 and NFPA Pamphlet 10 NOTE When cleaning avoid use of solvents around the pressure gauge They could seriously damage the plastic gauge face 2 Inspect the extinguisher for damaged missing or substitute parts Only factory replacement parts are approved for use on Amerex fire extinguishers 3 Check the date when last recharged The foam charge must be replaced every three years with the proper Amerex charge model 502 AFFF charge for models 250 and 254 model 504 FFFP for model 252 If the extinguisher is to be hydrotested do not reuse the charge even if within a three year cycle the foaming action will make it almost impossible to get complete charge back into the extinguisher 4 Weigh extinguisher and compare with weight printed on the Maintenance section of the nameplate label Recharge extinguisher if weight is not within the indicated allowable tolerances 10 11 12 13 14 Check the date of manufacture on the extinguisher hanger loop or on the extinguisher nameplate Cylinder must be hydrostatically tested every 5 years to the test pressure indicated on the label 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
7. ng 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 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 Install hose assembly into the operating valve Torque swivel nut lightly with a 15 16 wrench Install in hose clip 11 Install ring pin with ring facing front of the extinguisher Install new tamper seal recharge date and attach new recharge tag 12 Weigh assembled extinguisher and confirm that the total weight is within the allowable tolerances indicated in the Maintenance section on the extinguisher nameplate label TROUBLESHOOTING GUIDE WARNING Determine the source of a leak before the extinguisher is depressurized EXTINGUISHER MUST BE COMPLETELY DEPRESSURIZED BEFORE ANY ATTEMPT IS MADE TO DEVALVE IT AND CORRECT ANY LEAKAGE PROBLEM To depressurize hold the extinguisher in an inverted position and slowly squeeze the discharge handle Some liquid remaining in the downtube will be discharged so care should be taken in the area used for depressurization Thoroughly clean all valve parts after depressurization and valve removal PROBLEM CORRECTIVE ACTION Remov
8. per downtube see Parts List Inspect downtube o ring replace if necessary Rinse the cylinder with clean water and inspect the interior following CGA Visual Inspection Standard C 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 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 Install a P N 02141 Fill Pressurizi
9. racket 6 00160 Ring Pin Stainless Steel 24 5A 00532 Chain Nylon for ring Pin 24 6 01387 Lock Wire Seal Yellow 500 7 07762 Lever amp Rivet 1 7A 01563 Rivet Only for Handle 2 required 24 8 09020 Handle amp Rivets 1 8A 01564 Rivet Only for Handle 2 required 24 9 06479 Valve Stem Asy 6 0 05240 Collar O Ring 24 1 96093 Vale Siem pec bulk bag a6 2 05243 Valve Stem O Ring 24 3 00383 Spring 6 4 02595 Fill tube 5 05690 Downtube O Ring 12 6 02581 Downtube Retainer Asy 254 02209 Downtube Retainer Asy 250 252 7 03376 Footstand w Post Black 250 252 1 03109 Footstand Black 254 8 02141 Pressurizing Adapter 9 03181 Hydrotest Adapter 1 20 14776 Strap amp Clip 254 02117 o A AFFF Premix Charge 12 06981 DENN 504 FFFP Premix Charge 12 04488 Adhesive Footstand 3 oz tube 1 06247 Visilox Lubricant 5 oz tube 1 NOTE All Valve Assemblies include new Valve Body Pressure Gauge Wing Nut Lever amp Handle PARTS NOT PICTURED
10. re incorrectly labeled as UL component parts some are advertised as Amerex type None of these meet UL requirements and all of them void the Amerex extinguisher warranty and UL listing DO NOT SUBSTITUTE RECHARGE FIRE EXTINGUISHERS IMMEDIATELY AFTER ANY USE v cc Lu zz 2 2 H gt lt Lu LLI LL lt O LL REFERENCES IN THIS MANUAL AVAILABLE FROM NFPA 10 Portable Fire Extinguishers National Fire Protection Association P O Box 9101 Quincy MA 02269 9101 MODEL 254 6 LITER AFFF FOAM WITH SPRAY NOZZLE Model 250 2 1 2 GAL LON AFFF FOAM WITH ASPIRATED NOZZLE MODEL 252 2 1 2 GAL LON FFFP ALCOHOL RESISTANT FOAM WITH ASPIRATED NOZZLE CGA C 1 Methods for Hydrostatic Testing Compressed Gas Association of Compressed Gas Cylinders 1235 Jefferson Davis Hwy Suite 501 CGA C 6 Standard for Visual Inspection Arlington VA 22202 of Compressed Gas Cylinders AMEREX CORPORATION P O BOX 81 TRUSSVILLE ALABAMA 35173 0081 Phone 205 655 3271 Fax 800 654 5980 e mail sales amerex fire com Web Page http www amerex fire com Printed in U S A 0M05607D Rev 10 11 AMEREX CORPORATION DOES NOT SERVICE MAINTAIN OR RECHARGE FIRE EXTINGUISHERS THE MAINTENANCE AND RECHARGE PORTION OF THIS MANUAL IS PUBLISHED AS A GUIDE TO ASSIST SERVICE PERSONNEL IN THE INSPECTION MAINTENANCE AND RECHARGE OF AMEREX FIRE EXTINGUISHERS ONLY NO INSTRUCTION MANUAL CAN ANTICIPATE ALL POSSIBLE MALFUNCTIONS THAT MAY BE ENCOUNTERED
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