Method Statement Title: Start up and Commissioning of Chilled Water Pumps
1.0 Scope
The scope of this Method Statement is to define the method of Start-up and Commissioning of Tertiary Chilled Water Pumps installed in accordance with the Specification Sections 15700 & 15050.
Note
a. The testing and balancing of Chilled Water System will be covered under a separate Method Statement Ref. ETA/MS/M-015, which will be submitted for Consultant’s review prior to start-up. This will also include the required test formats.
b. For installation of CHW Pumps refer to Method Statement Ref. ETA/MS/M-006, Rev. 0.
2.0 Material
Tertiary chilled water pumps as per the enclosed schedule.
3.0 Test Equipment
3.1 Digital Multimeter
3.2 Clamp Meter
3.3 Tachometer
Note
The calibration certificates of testing instruments shall be verified prior to usage and copies shall be included in the test reports and copies of certificates issued to NMX for record prior to commencement.
4.0 Pre-commissioning checks prior to start-up
4.1 Mechanical
4.1.1 Check and inspect the installation of CHW Pump is complete, verify the installation as per approved drawings.
4.1.2 Verify compliance to the manufacturer’s installation instructions.
- Obtain installation certification from manufacturer or their authorized representative.
4.1.4 Check and ensure adequate clearance available for service and maintenance of pumps and motors.
4.1.5 Check the installation is coordinated with other services.
4.1.6 Ensure the shipping bolts / chambers are removed.
4.1.7 Check all nuts, bolts, screws, fasteners etc., are fixed and tightened as required.
4.1.8 Check the alignment is completed as per manufacturer’s instructions (where applicable).
4.1.9 Check all piping connections are complete including flexible connections where applicable.
4.1.10 Check and ensure the safety guards are in place and secure.
4.1.11 Rotate the pump manually and ensure free and smooth rotation.
4.1.12 Ensure the pumps are cleaned prior to start-up and all identification labels and tags are in place.
4.2 Electrical
4.2.1 Check all power cabling and control wiring is completed and dressed neatly. Check continuity.
- Check the power isolator is fixed close to the pump motor or emergency stop push buttons are provided close to the pumps for emergency power isolation.
4.2.3 Check all terminations are completed and tightened as required.
4.2.4 Check the grounding connections are completed and tightened as required.
4.2.5 Ensure the overload protections are set correctly as per the pump motor load current.
4.2.6 Ensure all identification tags and labeling works are complete.
5.0 Start-up and Testing
5.1 Check the line voltage and phase rotation before energizing the power.
5.2 Switch ON the power and start the pump and check the rotation is in the correct direction.
5.3 Immediately on start-up, check for any abnormal noise and vibration. Rectify as / if required. Consult manufacturer if required.
5.4 Observe for the correct operation of motor, pump and drive system.
5.5. Measure the current drawn (amperage) by the pump motor, measure the rpm and record the same.
5.6 After about an hours operation, check the tightness of all nuts, bolts, screws, etc., and retighten if necessary.
5.7 Recheck the alignment and adjust if required (where applicable).
5.8 Record all pump and motor nameplate data in the commissioning format.
5.9 Ensure compliance to all manufacturer’s commissioning instructions, as applicable.
5.10 Give clearance to the testing, adjusting & balancing agency for further testing, adjusting and balancing.
6.0 Safety
6.1 Only experienced and skilled personnel shall be engaged for start-up and commissioning of chilled water pumps.
6.2 Safety guards shall be in place and secured prior to start-up.
6.3 Cable test reports shall be verified prior to energisation.
6.4 Warning signs and tapes shall be placed during start-up and commissioning as required.
6.5 All safety procedures shall be followed in accordance with the project health and safety plan.
6.6 Safety Officer shall check and ensure all safety precautions are followed.
7.0 Inspection
- “Work Inspection Request” shall be raised for consultant’s inspection.
8.0 Records
8.1 Work Inspection Request (for Witness of start-up and commissioning) duly signed by NMX and Consultants
8.2 Signed-off pre-commissioning checklists
8.3 Commissioning reports
8.4 Calibration certificates of testing instruments
9.0 References
9.1 Specification Sections 15700 & 15050
9.2 Manufacturer’s start-up and commissioning instructions.
9.3 Approved CHW Pump submittals / drawings.
9.4 Approved shop drawings.
10.0 Attachments
10.1 Appendix 1 – Schedule of Pumps
