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Accumulator Tank Trouble Shooting Guide

Accumulator tank troubleshooting guide for fire systems. Identify common defects, pressure issues, and repair tips for pressure maintenance pumps in automatic fire sprinkler, hydrant, and fire hose reel systems. Includes troubleshooting for jacking pumps, electric pumps, and diesel pump repairs.

Accumulator Tank Troubleshooting Guide

ProblemPossible CauseSuggested Remedy / Troubleshooting Tips
Schrader Valve Leaking Water
  • Damaged or punctured accumulator tank bladder/membrane
  • Less commonly, internal valve failure
  • Inspect the valve seat and internal bladder for damage
  • Perform an isolation test to determine if the leak is from the valve or bladder
  • If damage is confirmed, replace the accumulator tank with a new bladder and valve assembly
No Pressure in the Accumulator Tank
  • Leakage from a damaged bladder or compromised fittings
  • Charge the tank to its specified pre-charge pressure
  • Perform a pressure decay test by isolating the tank and monitoring pressure over time
  • Verify gauge calibration and inspect all fittings and seals for corrosion or looseness
Rapid Cycling of the Pressure Maintenance (Jacking) Pump
  • Insufficient accumulator pre-charge pressure
  • Damaged or leaking bladder/membrane
  • Potential issues with check valves or pump control circuitry
  • Ensure the accumulator’s pre-charge is set to approximately 90% of the system’s operating pressure
  • Analyse pump cycle times against expected performance
  • Inspect pump control circuitry and check valves for proper operation

Additional Troubleshooting & Considerations

ProblemPossible CauseSuggested Remedy / Troubleshooting Tips
Accurate SizingAccumulator may be undersized relative to system volumeEnsure the accumulator is sized per manufacturer guidelines and system requirements.
Regular MaintenanceGradual deterioration due to wearSchedule routine inspections, calibrate gauges, and check seals to prevent unexpected failures.
Environmental FactorsCorrosion or sediment build-upRegularly inspect for corrosion and sediment; maintain a clean water system environment.
System IntegrationMismatched components or incorrect pressure ratingsVerify that all components (pump, accumulator, piping) are properly matched and rated.
Historical Data MonitoringEmerging performance issues over timeRecord pressure decay and pump cycling data to track accumulator performance and identify trends.

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