Chilled Water Pump Installation

SCOPE AND PURPOSE

This "Method Statement" covers the on-site installation of CHILLED WATER PUMPS and the requirements of checks to be carried out.

REFERENCE DOCUMENTS

· Project Specifications
· Approved shop drawings (latest revision)
· Approved material submittals

GENERAL

Chilled water Pumps are generally to be installed in locations shown in drawings in the Plant Rooms.

EQUIPMENT

· Drilling Machine
· Spirit Level
· Lifting Equipment (Cranes)
· Scaffolding
· Hand tools of Tradesmen
· Alignment tools

RESPONSIBLE PERSONNEL

· Project Engineers
· Construction In-Charge.
· Site Engineer/Site supervisor.
· QA/QC Inspectors.
· Safety officer
· Site Foremen.
· Pipefitters
· Helpers

METHOD OF PRE-INSTALLATION

• Ensure that the approved material required to carry out work is available.
• Check the nameplate details of the Chilled Water Pump as per the approved shop, drawing/schedules, and material submittals before installation.
• Prior to the commencement of work, the area and access will be inspected to confirm that the site is ready to commence the work.
• The site engineer will check all relevant documentation and material applicable to a particular section of work before commencement.

• Physical verification of material will be carried out for any damages prior to taking it from stores.
• The site engineer/supervisor will give the necessary instructions to the tradesman and provide the necessary construction/shop drawings.
• The site engineer/supervisor will also check that the tools and equipment available are in compliance with contract requirements.
• The site supervisor is to explain to tradesmen regarding the safety precautions to be observed.

METHOD OF INSTALLATION

1. Prior to the commencement of work, coordination will be done with other services.
2. Make sure that the Pumps are free from damage and that all internal components are complete and in good condition.
3. Chilled Water pump assemblies will be transported to the nearest point of erection. Care will be taken while handling the units to avoid Damage/distortion.
4. Ensure that the foundations of the Chilled Water Pumps are as per the approved shop drawing.
5. Install the Inertia base assembly on the foundation as per the approved shop drawing. Ensure the orientation, axis, and level of inertia base are as per the approved shop drawing.
6. Fix the vibration isolators to the inertia base as per the approved shop drawing. Ensure that the locations match with the Chilled Water Pump base anchoring details.
7. Complete the concrete filling in the Inertia base as per the approved shop drawing.
8. Concreting for the Inertia base will be carried out by the Main Contractor.
9. Install the chilled water pumps on the inertia base with vibration isolators connected to the chilled water pump base frame.
10. Ensure the orientation axis and level of the pump as per the approved shop drawing.
11. Ensure that the pump and motors are properly aligned.
12. Complete the piping connections, including Valves and accessories/flexible connections to pump suction and discharge sides as per the approved shop drawing.
13. Piping connections shall be erected to allow access to the operation and maintenance of the pump motors and valves.
14. Make sure that the piping connections are supported properly and that no imposed load of piping is transferred to the pump.
15. Complete all instrument mountings required as approved shop drawings.
16. Complete all electrical connections to the pump motor with all necessary electrical protection and controls as per the approved electrical shop drawing.
17. Complete the final alignment of the pump and motor under the manufacturer's representative’s supervision.

QUALITY CONTROL

• In general, it shall be ensured by the Site Engineer that the product manufacturer's recommendations are followed and shall be monitored by the QA/QC Engineer. However, the following points shall be ensured, in particular;
  · The appropriate and approved material is used.
  · The appropriate pump is used.
  · Skilled labor is employed for the installation of pumps.

TESTING

• The piping connections to pumps shall be pressure tested to 1.5 times the working pressure.
• Strainer shall be cleaned after the initial flushing of the Chilled water piping system.
• Insulation of piping is to be done after pressure testing.
• Electrical circuits/controls and connections are to be checked.

INSPECTION

• An inspection request (IR) shall be raised for the consultant's inspection.
• QC inspection shall be carried out as per the installation checklist and manufacturer's instructions.
• The inspection shall be recorded in the approved format.

SAFETY

• Work will commence as per safety regulations laid down in the contract specification and project safety plan.
• Proper safety harness to be used and secured, if required.
• All personal protective equipment shall be used as appropriate according to the nature of the job.
• Housekeeping shall be of good standard, and all cut lengths and debris shall be removed.
• All lifting operations shall be monitored by the Safety Officer.

References:

MEP Planning Manual by Mr. Gulshan Kumar