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PN 05605

 

04/2020

 

OWNER

S SERVICE MANUAL

 

INSTALLATION, OPERATING & SERVICING INSTRUCTIONS

 

 MANUAL PN 05605

 

125/150 LB. NITROGEN CYLINDER DRY CHEMICAL EXTINGUISHERS 

 

MODELS 450,451,452,467,468,469,470,471,472

 

All  fire  extinguishers  shall  be  installed,  inspected,  and  maintained  in  accordance  with  the  National  Fire 

Protection Association standard titled "Portable Fire Extinguishers", NFPA 10, or the National Fire Code of 

Canada and the requirements of local authorities having jurisdiction.

 

When  maintenance  is  indicated  it  shall  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, 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 may be 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

 

AMEREX  CORPORATION  DOES  NOT  SERVICE,  MAINTAIN,  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 

INSTRUCTION  MANUAL  CAN  ANTICIPATE  ALL  POSSIBLE  MALFUNCTIONS  THAT  MAY  BE 

ENCOUNTERED IN THE SERVICE OF FIRE EXTINGUISHERS. DUE TO THE POSSIBILITY THAT PRIOR 

SERVICE  PERFORMED  ON  THIS  EQUIPMENT  MAY  HAVE  BEEN  IMPROPERLY  DONE,  IT  IS 

EXTREMELY  IMPORTANT  THAT  ALL  WARNINGS,  CAUTIONS,  AND  NOTES  IN  THIS  MANUAL  BE 

CAREFULLY  OBSERVED.  FAILURE  TO  HEED THESE  INSTRUCTIONS  COULD  RESULT  IN  SERIOUS 

INJURY. AMEREX ASSUMES NO LIABILITY FOR SERVICE, MAINTENANCE, OR RECHARGE OF FIRE 

EXTINGUISHERS BY PUBLISHING THIS MANUAL.

 

AMEREX CORPORATION –

 

P.O. BOX 81 –

 

TRUSSVILLE, ALABAMA  35173

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0081

 

Phone:  205/655

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3271     Fax:  800/654

-

5980

 

e

-

mail:  

sales@amerex

-

fire.com

      Web Page:  

http://www.amerex

-

fire.com

 

REFERENCES IN THIS MAUNUAL:                                                        

NFPA 10 

Portable Fire Extinguishers  

JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ            

                                                          

 

CGA C

-

Methods for Pressure Testing Compressed Gas 

Cylinders

 

CGA C

-

Standard for Visual Inspection of Steel 

Compressed Gas Cylinders. 

 

National Fire Code of Canada

 

AVAILABLE FROM:                                                                             

National Fire Protection Association, 1 Batterymarch Park, 

Quincy, MA 02169

-

7471 

 

Compressed Gas Association, 14501 George Carter Way, 

Chantilly, VA 20151

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2923

 

Compressed Gas Association, 14501 George Carter Way, 

Chantilly, VA 20151

-

2923

 

National Research Council Canada, 1200 Montreal Road, 

Building M

-

58 Ottawa, ON K1A 0R6 Canada

 

Summary of Contents for 450

Page 1: ...D TITLE CT B002026 4 29 20 COVER SHEET DO NOT PRINT THIS PAGE FOR ACTUAL MANUAL INTERNAL USE ONLY NOTES 1 THIS COVERSHEET FOR INFORMATIONAL PURPOSES ONLY DO NOT PRINT THIS PAGE IN MANUAL 2 DESCRIPTION MANUAL OWNER S SERVICE FOR 45 46 47 WHEELED EXTINGUISHERS 3 ACTUAL PRINTED MATERIAL TO CONSIST OF ATTACHED 4 OVERALL SIZE OF PRINTED DOCUMENT PAGES 8 1 2 X 11 ON 20 LB PAPER 5 PRINTED MATERIAL TO MAT...

Page 2: ...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 AMEREX CORPORATION DOES NOT SERVICE MAINTAIN 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 ON...

Page 3: ... as it must be installed whenever the cylinder is transported Check the cylinder pressure The gauge shall read approximately 2015 PSI 13 9 MPa at 70 F 21 C ambient temperature The T handle valve shall have a pull pin and tamper seal Installed 8 Remove and save the safety vent plug installed on outlet of T handle gas cylinder valve Connect the gas supply hose firmly into the nitrogen cylinder valve...

Page 4: ...TO 60 SECONDS EFFECTIVE RANGE OF THE AGENT THROW 30 to 40 feet 9 TO 12 m HOSE LENGTH 50 feet 15 24 m SHUTDOWN 1 After making sure that the fire has been completely extinguished close the nozzle valve and close nitrogen cylinder valve push T handle to closed position Wheeled Extinguisher Tip over until it rests on both wheels and handle in this position much of the remaining chemical will stay in t...

Page 5: ...uisher will operate effectively and safely It includes 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 is required NOTE NFPA 10 spells out wheeled extinguisher maintenance procedures NFPA requires that regulators on wheeled extinguishers be checked annually to meet manufacturer s...

Page 6: ...GULATED WHEELED EXTINGUISHERS NOTE Steps R a thru R d apply to models with a Regulator These procedures shall be performed only by professionally trained and qualified service personnel thoroughly familiar with industry service procedures and safety precautions All extinguisher and service equipment components fittings and adapters must be in good condition and properly connected The only regulato...

Page 7: ...Operate the discharge valve lever to ensure proper operation and to clear the hose of any obstructions if hose is obstructed refer to Troubleshooting section of this manual f Close the nitrogen pressure source and slowly relieve remaining pressure by fully opening the discharge valve lever 9 Remove the agent cylinder fill cap and examine it closely for any signs of damage cracks or thread wear Cle...

Page 8: ...LEASE THE SAFETY VENT PLUG SHIPPED WITH THE EXTINGUISHER OR THE TEST KIT SAFETY VENT PLUG MUST BE INSTALLED TO PROTECT SERVICE PERSONNEL FROM A HIGH VELOCITY DISCHARGE IN CASE THE LEVER IS ACCIDENTALLY OPENED 14 Install a new Amerex Moisture Seal per instructions in the package Securely connect the discharge hose to the extinguisher When assembling the hose to the agent cylinder or nozzle to the h...

Page 9: ...ipping cap unscrew the wing nuts and remove the nitrogen cylinder from the extinguisher 5 Remove the 50 discharge hose from the storage rack and disconnect the hose from the agent cylinder fitting Blow out any dry chemical agent remaining in the hose Clean hose remove and discard the hose gasket from the female coupling 6 Remove remainder of ruptured moisture seal from the agent cylinder fitting R...

Page 10: ...inders Valve seat has leaked and has pressurized the agent cylinder Follow Recharge Procedure for restoring the extinguisher to service 3 Nitrogen pressure is too low Valve is closed Tamper seal is intact No pressure observed in the agent cylinder Leakage in the nitrogen valve at other than the valve seal Replace with a properly charged nitrogen cylinder 4 Shutoff nozzle does not move freely Disas...

Page 11: ...acing between side brackets and over the top bracket 2 The second loop is a REVERSE loop Notice that the hose passes behind the loop on this reverse loop If instructions are followed the hose will uncoil without kinks 3 The next loop is a regular hose in front loop Succeeding loops are alternated reverse front reverse etc for six full loops 4 Adjust the loops so that the nozzle fits into the nozzl...

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