CNG BUS FIRE SUPPRESSION SYSTEM INSPECTION

2026-11-03

In general , the Metro is requesting proposals from qualified certified companies to perform the annual maintenance of Amerex Suppression Fire System in Metro ’ s CNG fleet . This accounts for the inspection of a total of 50 New Flyer bus Amerex fire suppression systems . The vehicles must be in service at time of inspection to qualify for work ; vehicles not in service at time of inspection will not be included in the inspection cycle . Manufacturer # of vehicles ; New Flyer 50 ; The Regional Metropolitan Transit Authority of Omaha acquires supplemental services from outside vendors to maintain an acceptable equipment quality . This includes , but is not limited to , the inspection of our vehicle CNG Amerex suppression systems . Project Specifications : a . Technicians need to be certified to complete the inspections . b . Verify that hazards have not changed . Look for changes in vehicle operation or cleaning procedures that may have increased the hazard . Compare with the original vehicle hazard analysis . c . Examine and test all heat detection devices per guidelines in the latest version of applicable Amerex Installation , Operation and Maintenance Manual found at the Amerex website ( www . amerex - fire . com ). d . Inspect the Agent Cylinder ( s ) and Nitrogen Cylinder ( s ) on systems so equipped . If Pressure Gauge is bent or damaged , depressurize Cylinder ( s ) and replace . Clean Cylinder ( s ) to remove dirt , grease and foreign material . Make sure that instruction nameplates are securely fastened and legible . Inspect the Cylinder ( s ) for corrosion , abrasion , and dents or damage . Replace Nitrogen Cylinder ( s ) with new ones and hydrotest Agent Cylinder ( s ) if any of these conditions are found . If Agent Cylinder ( s ) are found to be faulty , replace . e . Remove and inspect control heads for damaged , missing , or substituted parts . Instructions for control head disassembly , cleaning and reassembly can be found in Chapter 6 . f . Inspect and clean the top of the Agent Cylinder Valve . g . Disconnect Discharge Fitting Kit or Agent Distribution Network ( V150 / V250 only ) from Agent Cylinder Valve ( make sure that actuation method ( s ) are removed or disabled when performing this step !). Inspect Agent Cylinder Valve discharge port for contaminants and clean if necessary . h . Examine the Agent Distribution Network . Look for signs of wear or chafing on network hoses . Replace any damaged hose sections . • Examine Nozzles and protective Dust Caps . If protective Dust Caps are missing from Nozzles , re - install new ones . i . Purge the Agent Distribution Network with air or nitrogen only . j . If a Pneumatic Actuation Network is used , unscrew Nitrogen Cylinders from actuators . Cycle each actuator several times verifying free travel of Puncture Stem Assembly inside of each actuator . If any defects are found , rebuild actuator . k . Verify that the Pneumatic Actuation Network is functioning properly by performing the Pneumatic Actuation Network Testing . l . Document all work completed during service for record retention . Disclose any anomalies , deficiencies to the property owner for corrective action requirements .

Nebraska

2026-04-29