This method statement covers the testing and commissioning of sump pump.
The objective of this method of statement is to check that the sump pump installation is correct as per the manufacturer’s recommendations and to prove that sump pump volumetric performance is achieved. Testing and commissioning also covers the testing of the alarms associated with the pump operation and interface signals to and from the BMS.
Commissioning engineer will be responsible for the day to day activities on site, for the preparation of test report, design information approval and the onsite testing.
Health and Safety procedures by the main contractor and by mechanical contractor will be implemented for this job.
The responsible safety officer as per mechanical contractor procedure will conduct a routine safety inspection in conjunction with the main contractor HSE requirements.
All instruments used, will carry valid calibration certificates/certificates of conformance to the tolerances specified in the referenced standards.
Instruments will be properly maintained and protected against damage during the sump pump testing activities.
Calibration periods for all instruments are as recommended by the instrument manufacturers and are in line with the requirements of the Commissioning Specialists Association.
Certificates will be available for presentation prior to commencement of the sump pump testing works.
Before commencing the sump pump commissioning works, the following information/items will be made available:
Sump pump installation is complete and sump pits are cleaned.
Check the sump pump discharge pipe work installation is complete and adequately supported as per approved drawings.
Overall sump pump installation is complete inspected and signed off by the engineer and main contractor.
Power supply cables to the sump pump panels have been tested.
Power is available at the sump pumps control panel.
Full set of up to date plant schedules which include details of pump performance curves, design volume & system resistance and electrical drive data.
Pre-commissioning checks prior to start-up of Sump Pump
The main objective here is to minimize the risks of injury and damage to personnel and equipment prior to the running of the pumps.
Sump pump installation will be inspected and signed off by consulting engineer prior to commissioning.
Installation checks will be made and recorded on the sump pump installation checklist and attached with testing and commissioning documents.
Checks comprise of the following:
- Installation is in accordance with the shop drawings and that the discharge pipe work is complete and correctly supported.
- All sumps are clean and free of obstruction.
- The float switches are installed in accordance with the manufacturers’ recommendations and detail drawings.
Mechanical Checks
Check and inspect the installation of Sump Pump is complete; verify the installation as per approved drawings.
Verify compliance to the attached manufacturer’s installation instructions.
Obtain installation certification from manufacturer or their authorized representative.
Check and ensure adequate clearance available for service and maintenance of pumps and motors.
Check the installation is coordinated with other services.
Ensure the shipping bolts / chambers are removed.
Check all nuts, bolts, screws, fasteners etc., are fixed and tightened as required.
Also check the alignment is done as per manufacturer’s instructions (where applicable).
Check and ensure the safety guards are in place and secure.
Rotate the pump manually and ensure free and smooth rotation.
Ensure the pumps are cleaned prior to start-up and all identification labels and tags are in place.
Electrical Checks
Check all power cabling and control wiring is complete and dressed neatly.
Check the sump pump sets are equipped with 4 numbers of float switches and they are connected to control panel.
Make sure the power isolator is fixed close to the pump motor for emergency stop and power isolation.
Check all terminations are complete and tightened as required.
Also check the grounding connections are complete and tightened as required.
Ensure the overload protections are set correctly as per the pump motor load current.
Make sure that all identification tags and labeling works are complete.
Sump Pump Start-up, Testing and Commissioning Procedure
Check the line voltage and phase rotation before energizing the power.
Switch ON the power and start the pump and check the rotation is in the correct direction.
Immediately on start up, check for any abnormal noise and vibration. If any unusual noise or vibration is observed stop the pump and rectify, if required consult manufacturer.
Observe for the correct operation of motor, pump and drive system.
Measure the current drawn (amperage) by the pump motor and record the same.
Record all sump pump and motor nameplate data in the commissioning format.
Ensure compliance to all manufacturer’s commissioning instructions, as applicable.
Set and record level switch settings.
Set and record over load settings.
Check guide rail mechanism for proper functioning.
Now check operation of all panel indication lamps simulating alarm.
Check operations of auto changeover of duty pump to the standby pump on alarm.
Also check cyclic changeover of duty pump.
Check operation of low level cut out
Also check operation of high level switch/Alarm.
Lowest float switch is provided for dry run protection.
Once the water level reaches to the second float switch duty pump will run in auto & hand mode.
If the water level reaches to 3rd float switch, then standby pump will also start running.
If again water level increases to 4th float switch which is at high level, the alarm will start ringing indicating the high water level.
BMS Interface Procedure
The BMS signals are simulated and the change in status of the output signals to the BMS is tested with a continuity tester on the BMS terminal rail connection.
BMS interface operation will be demonstrated as per approved point schedule.
After successful testing and commissioning of sump pump, the results will be recorded in the commissioning test reports contained within this document.
The testing and commissioning of the sump pump will be 100% verified and upon completion of this, offered for inspection, approval and acceptance from consultant.
Work Inspection Request shall be raised for consultant’s inspection and sign off.