Method Statement Title: Installation of Chilled Water Pumps
- Scope
- This method statement applies to installation of chilled water pumps and associated valve package.
- Purpose
- Purpose of this method statement is to outline the method of storage, handling and installation of chilled water pumps and valve package.
- Material
- Pump and motor assembled on a common base frame, coupled using suitable coupling arrangement by the manufacturer.
- Isolation valves, strainers, NRV, flexible connectors and piping accessories as per approved submittals.
- Pump foundation as per approved drawings.
- Method
- Receiving
- When received at site, each pump shall be checked for quantities, model number, physical damages, etc., and notify supplier of any discrepancies for suitable rectification or replacement.
- Valves and other accessories shall be checked for size, model and quantity. Receiving inspection shall be conducted by the storekeeper, engineer and QC engineer, which shall be documented.
- Valves shall be segregated as per sizes/models and stored on racks within a covered store.
- Any items found damaged or not found suitable as per the project requirements shall be quarantined. Non-compliant material shall be clearly marked and stored separately to prevent any inadvertent use until returned to vendor.
- Storage
- Upon completion of receiving QC inspection, the pumps will be segregated model/size wise and stored accordingly for easy retrieval.
- Pumps shall be stored on a flat surface in well ventilated and covered storage area.
- Inlet and outlet flange blanks shall not be removed until ready for connection to pipe work.
- Manufacturer’s instruction shall be strictly followed as applicable.
- If the pumps are stored for longer periods the shaft shall be periodically rotated.
- Preparation
- The foundations designed to meet the vibration and sound control requirements shall be provided my Main Contractor. Inertia bases will be supplied along with vibration isolators.
- Check and ensure that the shop drawings used are latest and approved for construction.
- ETA will co-ordinate the location of foundation as per approved shop drawings.
- Co-ordinate with the main contractor to ensure that the foundations/concrete filling to inertia bases made as per approved shop drawings.
- The foundation surface shall be flat and level and smoothly finished top surface.
- Check co-ordination with other services prior to the installation.
- Check the piping support locations and cable tray routing locations in co-ordination with pump and piping layout and ensure they are not obstructing the space around pump.
- Ensure easy accesses and sufficient clearance for servicing and maintenance i.e, for replacement of pump, motor, cleaning of strainer, valves etc.
- Installation
- Mark the locations of the pump base frame.
- Install the inertia base/pumps as per attached Annexure-I.
- Shift the pumps to the place of installation in safe manner. Use hand trolley/folk lift/crane as applicable/required as per site conditions.
- Alignment of coupling arrangement between motor and pumps, after pump installation shall be rechecked by the pump supplier before testing.
- Ensure proper coupling guards are provided, where applicable.
- Complete the piping and valve package installation as per approved drawings. Remove the ends caps fixed on the inlet and outlet flanges.
- Install the electrical power connections as per approved drawings and test for continuity.
- Provide grounding wiring as per approved drawings/manufacturers instruction.
- Follow the manufacturers instructions while installing the pump.
- Inspection
- After completion of pump installation and piping connections, QC inspection shall be carried out as per pump installation check list.
- “Work Inspection Request” shall be raised for consultants inspection.
- Safety
- All safety precautions shall be followed as per established project safety plan and procedure.
- Only experienced and skilled technicians shall be engaged for carrying out pump installation work.
- The people involve din the installation shall use PPE such as safety helmets, safety shoes, harness, gloves, etc., as required.
- Safety officer shall check and ensure that all safety precautions are followed.
- Safety officer shall check and ensure that all scaffolding and ladders used at site are having duly signed tags.
- References
- Manufacturers catalogue.
- Approved chilled water pump submittals.
- Shop drawings.
- Specification Section 15700.
- Records
- `Work Inspection Request’ duly signed by the Consultant’s for installation.
8.2 Pump installation check list.
