Specifications For Daily Maintenance Of Fire Pumps

Specifications for Daily Maintenance of Fire Pumps
I. Daily Inspection
1. Control Cabinet Inspection
Ensure power indicator, fault indicator and running indicator work normally without alarms such as phase loss or overload.
Keep the selector switch in AUTO position; verify smooth switching between manual and automatic modes.
Check terminal blocks for looseness, overheating or burnt odor; ensure components are free of dust accumulation and dampness.
2. Pump Body Inspection
Check pump casing and coupling cover; replace mechanical seal immediately in case of severe leakage.
Ensure motor housing has no abnormal overheating or abnormal noise, and bearing runs smoothly without strange sounds.
Inspect anchor bolts and connecting fasteners for looseness and rust.
3. Pipeline & Valve Inspection
Keep inlet and outlet valves fully open and locked; relief valves and check valves shall be leakage-free.
Confirm pressure gauges and vacuum gauges show normal readings with intact dial faces.
II. Weekly Maintenance & Test Run
Jog test: Close outlet valve, start and stop motor briefly to check rotating direction; reverse rotation is prohibited.
Full-load trial run (no less than 5 minutes):
Open outlet valve, operate pump from no-load to loaded condition, record outlet pressure, current and voltage.
Check for abnormal vibration, noise and water leakage; confirm normal motor temperature rise.
Vent air trapped inside pump body and pipelines to avoid cavitation and no-water output.
Fire hydrant pumps and sprinkler pumps must be started and tested weekly with maintenance records filed.
III. Monthly Maintenance
Remove dust from control cabinet, motor and pump body to prevent short circuit caused by dampness.
Tighten all pipeline flange connections, motor wiring terminals and anchor bolts.
Calibrate pressure gauges; replace faulty or out-of-tolerance gauges promptly.
Check water level and water replenishment device of fire water tank to guarantee effective designed water storage capacity.
Inspect relief pipelines and automatic start-stop interlock function of pressure maintaining pumps.
IV. Troubleshooting & Operation Prohibitions
Common Fault Handling
No water discharge: Check rotating direction, bottom valve leakage, entrapped air in pump, insufficient tank water or closed inlet/outlet valves.
Excessive vibration and abnormal noise: Possible causes include loose anchor bolts, foreign matters stuck in impeller, damaged bearing or cavitation.
Forbidden Operations
Do not run pumps with half-open valves for throttling purpose.
Do not arbitrarily alter automatic setting of control cabinet.
Do not cut off power supply without authorization.