Manual for Wheeled Unit 688
Contents
1. Use a regulated pressurizing source of dry nitrogen only with a minimum dew point of mi nus 70 F minus 57 C Set the regulator to no more than 265 psi 1827 kPa 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 Never leave an extinguisher connected to a regulator of a high pressure source for an ex tended period of time A defective regulator could cause the cylinder to rupture due to ex cessive pressure 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 chemi cals may result in a chemical reaction capable of developing a dangerous pressure buildup RECHARGING PROCEDURE Perform steps 1 through 12 of the Complete Maintenance Six Year Teardown section Thoroughly clean all parts of the disassembled valve with a soft bristle brush or soft cloth Blow the valve out with air or nitrogen Inspect spring and downtube assembly and replace parts if worn or damaged Install a new valve stem and collar o ring after lightly lubricating with Bluestar V 711 or equal do not lubricate the valve stem seal Reassemble the valve assembly including downtube and set aside MANUAL 22241 REV D 9 5 14 9 4 Remove any chemical remaining in the cylinder an2. HOSE SUPPORT j N 04945 HUB CAP BLACK 13 21573 DISCHARGE VALVE PKP COMPLETE WITH DOWNTUBE 14 15 16 07751 10234 06059 WHEEL ASSY HARDWARE SEMI PNEUMATIC WHEEL ASSY WITH HARDWARE PNEUMATIC VALVE LEVER WITH SCREWS 17 18 05225 06100 GAUGE 240 PSI PULL PIN WITH WIRE 19 20 03562 00155 GAUGE GUARD ASSY PRESSURE VALVE W CAP 21 22 03678 06060 VALVE BODY CAM WITH ORINGS 23 05239 COLLAR ORING 24 05067 VALVE STEM ASSY 25 04938 DOWNTUBE ASSY 26 03556 SPRING 27 10913 HOSE ASSY 3 4 IN X 25 FT 28 22974 SUPPORT HOSE CYL 50 RD GOV 29 22543 TAPE REFLECTIVE PKP MANUAL 22241 REV D 9 5 14 12
3. the six year requirement shall begin from that date NOTE Some states have legislation which requires Complete Maintenance on an annual basis Please contact your local Amerex Distributor to see if these require ments apply to you NFPA 10 recommendation requires that a verification of ser vice external collar tag be installed on the extinguisher whenever a Six Year Mainte nance is performed The verification of service tag can only be installed if the oper ating valve has been removed 1 Discharge chemical and pressure into a closed dry chemical recovery system several are commercially available Make sure that the extinguisher is completely empty and depressur ized CAUTION These extinguishers operate at 240 psi Some recovery systems may require that the pressure be reduced to safely discharge the chemical and pres sure into the system Use the pressure bleeder valve on the extinguisher valve to re duce the pressure to a point registering just below the green operable area on the pressure gauge Discharge extinguisher into recovery system Repressurize the ex tinguisher to no more than 200 psi to exhaust any chemical remaining in the extin guisher NOTE A closed recovery system is designed to prevent loss of the chemi cal fines Loss of the fines could result in reduced extinguisher efficiency 2 Clean extinguisher to remove dirt grease or foreign material Check to make sure that the instruction nameplate is securel
4. will operate effectively and safely It in cludes a thorough examination for physical damage or condition to prevent its operation and any necessary repair or replacement It will normally reveal if hydrostatic testing or internal maintenance is required MAINTENANCE SERVICE PROCEDURE NOTE THIS PROCEDURE WILL BE BEST ACCOMPLISHED WITH THE EXTINGUISHER IN AN UPRIGHT POSITION AND ON A LEVEL SURFACE 1 Clean extinguisher to remove dirt grease or foreign material Check to make sure that the in struction nameplate is securely fastened and legible Inspect the cylinders for corrosion abra sion dents or weld damage If any damage is found hydrostatically test to factory test pressure 500 psi 3448 kPa using the proof pressure method in accordance with instructions in C 6 and NFPA 10 See proper method of depressurizing and reclaiming chemical in Recharge proce dures 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 Weigh the extinguisher and compare with weight printed in the Maintenance section on the nameplate label Recharge extinguisher if weight is not within indicated allowable tolerances 4 Check the date of manufacture printed on the extinguisher label nameplate or on the agent cyl inder dome
5. AIN OR RECHARGE FIRE EXTINGUISHERS THIS MANUAL IS PUBLISHED AS A GUIDE TO ASSIST QUALIFIED SERVICE PERSONNEL IN THE INSPECTION MAINTENANCE AND RECHARGE OF AMEREX FIRE EXTINGUISHERS ONLY NO IN STRUCTION MANUAL CAN ANTICIPATE ALL POSSIBLE MALFUNCTIONS THAT MAY BE ENCOUN TERED IN THE SERVICE OF FIRE EXTINGUISHERS DUE TO THE POSSIBILITY THAT PRIOR SER VICE PERFORMED ON THIS EQUIPMENT MAY HAVE BEEN IMPROPERLY DONE IT IS EXTREMELY IMPORTANT THAT ALL WARNINGS CAUTIONS AND NOTES IN THIS MANUAL BE CAREFULLY OB AMEREX ASSUMES NO LIABILITY FOR SERVICE MAINTENANCE OR RECHARGE OF FIRE EXTIN GUISHERS BY PUBLISHING THIS MANUAL PREPARING YOUR NEW EXTINGUISHER FOR USE 1 Examine the extinguisher for evidence of shipping damage Notify the delivering carrier immediate ly if any damage is discovered 2 Remove all wrappings straps and pallet retaining bolts 3 Check to insure that the hose connection to the operating valve and shut off nozzle to the hose are tight 4 Check to insure that the shut off nozzle is in the closed position The ring safety pin should be in stalled in the operating valve and the lockwire tamper seal intact 5 Check to make sure that the cap is on the bleeder valve located on the side of the extinguisher operating valve The pressure seal is in the cap and it must be in place to prevent leakage 6 This extinguisher is shipped from the factory fully charged Visually inspect the pressure gauge the p
6. ATION NOTE Persons expected to use this extinguisher should be trained in initiating its operation and in the proper firefighting technique Familiarize all personnel with this information before an emergency occurs 1 Move the extinguisher to within approximately 50 feet of the fire site Keep the extinguisher upright CAUTION This extinguisher must be operated in an upright position If equipped with an optional tow loop and vehicle towed to the fire scene remove from tow hitch and operate in a vertical position CAUTION Towing speeds in excess of 10 mph 16 km h will result in damage to semi pneumatic wheels Damage caused by excessive towing speeds is not covered under warranty 2 Twist and pull ring pin Open cylinder discharge valve by rotating pulling the handle valve lever to ward the hose The hose is now pressurized with chemical 3 Pull nozzle with lever in the closed position from the mount and extend the hose from the storage rack 4 Stand back 30 feet from the fire and aim the nozzle at base of flames nearest you Open nozzle by pulling handle toward you be prepared for a discharge recoil by holding the nozzle firmly 5 Sweep side to side across the base of the fire and past both edges Progressively follow up until the fire is extinguished Work the fire away from you while being alert for flashbacks Move closer as the fire is extinguished but not so close as to scatter or splash the burning materials 6
7. OWNERS SERVICE MANUAL NO 22241 INSTALLATION OPERATING amp SERVICING INSTRUCTIONS All fire extinguishers should be installed inspected and maintained in accord ance with the National Fire Protection Association standard titled Portable Fire Extinguishers NFPA 10 and the requirements of local authorities having juris diction When maintenance is indicated it should be performed by trained persons hav ing 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 and all metal parts meet precise specifications and are subjected to multiple in house inspections and tests for acceptability There are substitute parts availa ble that may be incorrectly labeled as UL component parts some are advertised as Amerex type None of these meet UL requirements and all of them voids the Amerex extinguisher warranty and UL listing DO NOT SUBSTIT
8. TER ANY USE INSPECTING THE EXTINGUISHER This extinguisher should be inspected at regular intervals monthly or more often if circum stances dictate to insure that it is ready for use Inspection is a quick check that a fire ex tinguisher is available and is in operating condition It is intended to give reasonable assur ance that the fire extinguisher is fully charged This is done by verifying that it is in its desig nated place that it has not been actuated or tampered with and that there is no obvious physical damage or condition to prevent its operation PERIODIC INSPECTION PROCEDURES Monthly or more often if circumstances dictate NFPA 10 Periodic inspection of fire extinguishers shall include a check of at least the following items CONOOaARWND Location in designated place No obstruction to access or visibility Pressure gauge reading or indicator in the operable range or position Operating instructions on nameplate and facing outward Safety seals and tamper indicators not broken or missing Examination for obvious physical damage corrosion leakage or clogged nozzle Determine fullness by weighing Wheels rotate freely MANUAL 22241 REV D 9 5 14 5 MAINTENANCE NFPA 10 At least once a year or more frequently if circumstances require maintenance should be performed Maintenance is a thorough check of the extinguisher It is intended to give maximum assurance that a fire extinguisher
9. The agent cylinder must be hydrostatically tested in accordance with DOT require ments to the test pressure indicated on the nameplate 5 Visually inspect the pressure gauge If bent damaged or improper gauge depressurize and replace If pressure is low check for leaks 6 Check ring pin for freedom of movement Replace if bent or if removal appears difficult 7 Visually inspect without removing the agent fill plug for damage or distortion Replace as nec essary only after proper depressurization procedures have been performed see complete Maintenance Six Year Teardown instructions MANUAL 22241 REV D 9 5 14 6 8 WARNING ALWAYS OPEN THE SHUTOFF NOZZLE HANDLE SLOWLY ANY EVI DENCE OF AGENT IN THE NOZZLE INDICATES THAT THE UNIT MAY HAVE BEEN USED AND THE USE NOT REPORTED BE PREPARED FOR A POSSIBLE DISCHARGE AND NOZZLE RECOIL Check the nozzle shutoff lever for freedom of movement open and close several times If the operation is impeded disassemble the nozzle replace parts and or proper ly lubricate as necessary Make sure that the nozzle tip is clear and unobstructed 9 After making sure that there is no residual pressure in the discharge hose disconnect it from the operating valve Blow air through the hose and nozzle assemblies to insure that the passage is clear of foreign material Check the couplings hose and hose gasket for damage or deterioration replace as necessary 10 Inspect the valve assembly for corro
10. UTE RECHARGE FIRE EXTINGUISHERS IMMEDIATELY AFTER ANY USE m o lt m m l lt zZ O a oc lt gt m gt m lt O S x m l fam oc gt a REFERENCES IN THIS MANUAL AVAILABLE FROM NFPA 10 Portable Fire Extinguishers National Fire Protection Association 1 Batterymarch Park P O Box 9101 Quincy MA 02269 9101 MODEL 688 STORED PRESSURE WHEELED cc LLI gt 2 2 gt lt Lu Lu LL ol lt Lu ze O gt cc n m Z O oO O LO CGA C 1 Methods for Hydrostatic Testing of Compressed Gas Association Inc Compressed Gas Cylinders 4221 Walney Road 5 Floor CGA C 6 Standard for Visual Inspection of Chantilly VA 20151 2923 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 USA MANUAL 22241 REV D 9 5 14 1 THIS MANUAL IS ATTACHED TO EVERY NEW EXTINGUISHER SHIPPED FROM THE FACTORY IT CONTAINS VALUABLE INFORMATION WHICH SHOULD BE STUDIED BY EVERYONE WHO WILL USE OR SERVICE THE EXTINGUISHER THE ANUAL SHOULD BE STORED IN A CONVENIENT LOCATION FOR EASY REFERENCE INTRODUCTION The Amerex Models 688 Stored Pressure Wheeled Dry Chemical fire extinguishers designed to provide larger volumes of dry chemical fire fighting agent than hand portable types for industrial ap plications The wheeled version can eas
11. When the fire is out push the hose discharge lever forward to the closed position Stand by and watch for possible reignition 7 Evacuate and ventilate the area immediately after extinguishing the fire The fumes and smoke from any fire may be hazardous and can be deadly DISCHARGE TIME 688 30 Seconds approximately EFFECTIVE RANGE OF AGENT THROW IS 25 TO 30 FEET HOSE LENGTH 25 FEET MANUAL 22241 REV D 9 5 14 4 SHUTDOWN CAUTION BEFORE PERFORMING THE SHUTDOWN PROCEDURE AND PREPARING TO MOVE THE EXTINGUISHER TO THE RECHARGE LOCATION DETERMI NATION MUST BE MADE THAT THE FIRE IS COMPLETELY EXTIN GUISHED AND THERE IS NO DANGER OF A FLASHBACK NOTE These steps will allow easy depressurization of the extinguisher and clear the hose assembly with a minimal loss of remaining chemical 1 Tip the extinguisher to the horizontal position resting on the carriage handle and slowly rotate the cylinder discharge valve lever to the open position Slowly push the hose discharge nozzle lever to the open position and be prepared for some chemical discharge When all pressure has been evacuated from the extinguisher return the hose discharge nozzle lever and cylinder discharge valve lever to the closed position Return the extinguisher to the upright position Coil the hose onto the storage rack and position the nozzle into the mount in preparation for transport to the recharge location RECHARGE EXTINGUISHERS IMMEDIATELY AF
12. d disassemble the nozzle replace parts and or properly lubricate as necessary Make sure that the nozzle tip is clear and unobstructed 9 Disconnect the discharge hose from the operating valve Blow air through the hose and noz zle assemblies to insure that the passage is clear of foreign material Check the couplings MANUAL 22241 REV D 9 5 14 8 hose and hose gasket for damage or deterioration replace as necessary The discharge hose should be hydrostatically tested to 300 psi 2068 kPa every twelve years 10 Inspect the wheels to insure they rotate freely Lubricate as required 11 Check carriage assembly for loose nuts bolts frame distortion or damage Check welds for damage or corrosion Replace damaged parts or make repairs as necessary 12 WARNING Valve removal and or valve part replacement should be made only after completing the depressurizing procedures listed in Step 1 of the Complete Mainte nance section Remove operating valve assembly Inspect for corrosion or damage to hose thread connection 13 Complete steps 2 through 15 of Recharge Procedure RECHARGE WARNING Before attempting to disassemble be sure the extinguisher is completely depressurized Never have any part of your body over the extinguisher while removing the valve assem bly Use a protective shield between you and the pressure gauge while charging an extin guisher Do not stand in front of the gauge if a shield is not available
13. d check the condition Properly dispose of any chemical that is contaminated or caked 5 Inspect the cylinder interior following CGA Visual Inspection Standard C 6 6 Using an accurate scale fill cylinder 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 con tamination See Warning g DO NOT MIX TYPES OF CHEMICALS 7 Clean cylinder collar O ring seat and collar threads with a small brush and then wipe off surfaces with a clean cloth to remove dust Lightly brush the collar O ring seat with Bluestar V 711 or equal 8 Install verification of service external collar tag Install discharge valve assembly and attach pressurizing adapter P N 09857 to discharge port 9 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 240 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 aeration of the chemical through the downtube Do not use the bleeder valve to pressurize the extinguisher 10 Check extinguisher for leaks by applying detecting fluid or a so
14. emove valve assembly remove and discard O ring clean collar and lube lightly with Bluestar V 711 Clean O ring groove on valve and install new collar O ring Lubricate with Bluestar V 711 Remove cap clean threads thoroughly and install new O ring Lubricate O ring with Bluestar V 711 Check valve stem seating area for scratches or foreign matter Clean seating area with a tooth brush and soft cloth Install new valve stem assembly Remove and reinstall valve using Teflon tape on threads Note Bleeder valve cap must be installed to prevent leakage Remove defective gauge an install the proper Amerex pressure gauge P N 05225 240 psi using Teflon tape on the gauge threads Contact Amerex if under warranty otherwise mark REJECTED and remove from service or return to owner Pressure gauge threads are coated with a special epoxy at the factory For easy removal soak the valve assembly in hot water 180 F for two to four minutes Re move gauge with a thin 7 16 open end wrench MANUAL 22241 REV D 9 5 14 11 ITEM PART DESCRIPTION pax 06210 NOZ WU ANOD 281 06279 VLV ASY BALL WU 150 03877 GASKET HOSE 01387 SEAL TAMPER NOT SHOWN 09806 07482 BKT ASY 811G CR RD PICTOGRAM 50 BC S PRS 21591 22230 NPLATE 688 50 0 PK GOV FE 332 20 C02 USA GOV O I NIAI BR Wl n m oe 22242 22243 CYLINDER 50 LB PKP RED CARRIAGE ASSY RED e f 21592
15. erex warrants its fire extinguishers to be free from defects in material and workmanship for a pe riod of six 6 years from the date of purchase During the warranty period any such defects will be repaired or the defective extinguisher replaced if only factory replacement parts and recommended service equipment have been used to service the extinguisher This warranty does not cover de fects resulting from modification alteration misuse exposure to unusually corrosive conditions nor improper installation or maintenance All implied warranties including but not limited to warranties of fitness for purpose and merchantability are limited to the timer periods as stated above In no event shall Amerex Corp be liable for incidental or consequential damages Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages so that the above limitations or exclusions may not apply to you Amerex Corp neither assumes nor authorizes any representative or other person to assume for it any obli gation or liability other than expressly set forth herein This warranty gives you specific legal rights and you may also have other rights which may vary from state to state To obtain performance of the obligation of this warranty write to Amerex Corp P O Box 81 Trussville AL 35173 0081 for instructions MANUAL 22241 REV D 9 5 14 2 AMEREX CORPORATION DOES NOT SERVICE MAINT
16. ily be transported and operated by one person and in a stationary configuration and can be mounted in a small space The cage type carriage provides protection for the operating valve cylinder and hose assembly Easy rolling 16 inch semi pneumatic rubber tires assure minimum effort to quickly transport them through narrow spaces to a fire scene Maximum protection from severe corrosive environment is afforded by the Amerex corrosion re sistant metal preparation and paint finish The operating valve handle gauge guard fill cap house couplings and ball type shutoff are brass or brass chrome plated for years of trouble free use These models carry an Amerex warranty of six years see full wording of the warranty below Field recharging is possible utilizing maintenance recharge equipment available through your Amerex Distributor To provide optimum extinguisher reliability recharging should be performed by persons trained in fire extinguisher maintenance and servicing This manual should be used as a guide for installing operating and servicing this extinguisher The best place to have your extin guisher serviced and recharged is your Authorized Amerex Distributor who has the professional ex perience and equipment to do it properly NOTE THIS MANUAL INCLUDES SERVICE INFORMATION FOR DRY CHEMICAL EXTIN GUISHERS ONLY SEE MANUAL 05603 FOR MAINTENANCE AND SERVICE INSTRUCTIONS FOR CARBON DIOXIDE EXTINGUISHERS SIX YEAR LIMITED WARRANTY Am
17. lution of soapy water to the nitro gen charging adapter orifice around the collar o ring sealing area cylinder welds and gauge Remove the pressurizing adapter 11 Reconnect the hose to the operating valve Properly coil the hose on the rack and install the nozzle with the lever in a closed position on the mount NOTE When assembling the hose to the agent cylinder or nozzle to the hose tighten the coupling 4 turn after contacting the hose gasket 12 Install ring safety pin and lockwire tamper seal Record recharge date and attach new re charge tag 13 Weigh assembled extinguisher and confirm that the total weight is within the allowable tolerances indicated in the Maintenance section of the nameplate label 14 Return extinguisher to its proper location Mountings for stationary extinguishers should be properly secured MANUAL 22241 REV D 9 5 14 10 TROUBLESHOOTING GUIDE WARNING Before attempting to correct any leakage problem be sure that the agent cylin der 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 in verting the extinguisher After depressurizing the extinguisher and correcting the problem it will be necessary to clean all valve parts thoroughly ai PROBLEM CORRECTIVE ACTION Leak at collar O ring R
18. ressure should be in the green zone 240 psi approx 10 psi range The most accurate method to determine if the extinguisher is filled with the proper amount of chemical is to weigh the unit The gross weight is indicated on the nameplate label NOTE Slight pressure variances in the gauge reading may be found if the extinguisher has been subjected to extremes of heat or cold High temperatures can cause high gauge readings and low temperatures low readings When in doubt condition the extinguisher to 70 F 21 C for several hours to obtain more accurate pressure gauge readings 7 Record the date the unit is being placed into service on the inspection tag and attach it to the extin guisher INSTALLATION Do not place this extinguisher close to a potential fire hazard Amerex recommends location no less than a 50 foot distance from the hazard while leaving an unobstructed access Avoid placing it in an extremely hot or cold place The operational temperature range for this extinguisher is 65 to 120 F 54 to 49 C The extinguisher should be adequately protected if temperatures outside of this range are anticipated Keep the extinguisher clean and free from dirt ice chemicals and any contaminants which may interfere with its proper operation Do not functionally test this fire extin guisher Testing or any use may cause the extinguisher to gradually lose pressure and become ineffective MANUAL 22241 REV D 9 5 14 3 OPER
19. sion 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 Complete Maintenance Pro cedure _ _ Reconnect the hose to the agent cylinder Properly coil the hose on the rack and install the noz zle with the lever in a closed position on the mount NOTE WHEN ASSEMBLING THE HOSE TO THE AGENT CYLINDER OR NOZZLE TO THE HOSE TIGHTEN THE COUPLING TURN AFTER CONTACTING THE HOSE GASKET 12 Inspect the wheels on Models 688 to insure they rotate freely Lubricate as required On station ary models check mountings to insure that they are securely fastened 13 Check carriage assembly for loose nuts bolts frame distortion or damage Check welds for damage or corrosion Replace damaged parts or make repairs as necessary 14 Install new lockwire tamper seal and record service data on the extinguisher inspection tag 15 If the extinguisher has been moved to perform service make sure that it is returned to its proper location MANUAL 22241 REV D 9 5 14 7 COMPLETE MAINTENANCE SIX YEAR TEARDOWN NFPA 10 Every six years stored pressure extinguishers that require a 12 year hydrostatic test shall be emptied and subjected to the applicable maintenance procedures When the ap plicable maintenance procedures are performed during periodic recharging or hydrostatic testing
20. y fastened and legible Inspect the cylinder for corrosion abrasion dents or weld damage If any of these conditions are found and you doubt the in tegrity of the cylinder hydrostatically test to factory test pressure marked on the nameplate label in accordance with CGA C 1 and NFPA 10 and DOT regulations NOTE When cleaning avoid use of solvents around the pressure gauge They could seriously damage the plastic gauge face 3 Inspect the extinguisher for damaged missing or substitute parts Only factory replacement parts are approved for use on Amerex fire extinguishers 4 Check the date of manufacture on the extinguisher dome Cylinder must be hydrostatically proof pressure tested every 12 years first time every 7 years thereafter to the test pres sure indicated on the nameplate 500 psi 3448 kPa Cylinder may be hydrostatically tested every 12 years using the water jacket method 5 Visually inspect the pressure gauge if bent damaged or improper gauge replace with the proper Amerex pressure gauge see Parts List 6 Check ring pin for freedom of movement Replace if bent or if removal appears difficult 7 Verify that no pressure remains in the extinguisher Operating valve and nozzle shutoff in open position and there is no discharge Remove and inspect the agent fill cap for dam age or distortion 8 Check the nozzle shutoff lever for freedom of movement open and close several times If the operation is impede
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