This testing and commissioning method statement defines the nature and method of Pre-Commissioning & Commissioning of Water Leak Detection System, which has been already installed and approved in the project.
However, contractual terms and conditions shall be applied and enforced in case of any contradictory matters that may arise.
Purpose of this method is to control the commissioning activities in line with the Project Quality Plan and Project Technical Specification requirements to achieve the optimum results for the water leak detection system.
Water Leak Detection System Introduction:
The proposed Water leak detection system in the project includes different independent zones, with multiple sense cables, monitored by a control panel.
Inside the zones, each cable will be named and recognized as working independently.
Water Leak Detection system used shall detect and locate simultaneous leaks precisely.
In case of the leak in one zone, the rest of the cable inside this specific zone shall remain active and shall be able to detect any other leak.
Necessary Instruments, Equipment & Tools:
• Portable Hand Tools
• Set of kit for Connection
• Hold down clips with adhesive
• Step Ladder
• Multi-Meter
• Screw Driver/ Cutter
References & Related Documents:
Project Quality Plan / Commissioning Plan
Technical Specifications Package
Approved Material Submittal
Manufacturer Recommendations for Installation & Commissioning.
Commissioning Team Role:
All pre commissioning and commissioning activities of Water leak Detection System are the responsibility of contractor’s commissioning Team.
Pre-commissioning and commissioning of water leak detection system shall be carried out by specialist contractor / supplier under the direct supervision of contractors electrical or mechanical commissioning engineers.
Contractor shall check the commissioning works prior to submission to the client for witnessing and approval.
In case of failure in any test, the specialist Contractor will rectify, and to re-offer the test for re-witnessing and approval.
Final Testing & Commissioning Report for Water leak Detection System will be forwarded to the client.
QA/QC Engineer shall inspect the installation activities to ensure system completeness/readiness is achieved before commencement of any Commissioning activity and shall be monitoring the commissioning activities to ensure quality standards are maintained throughout the T&C activities.
Health and Safety Requirements
All the safety requirements as per HSE rules shall be strictly followed by every individuals in order to have a safe working environment and avoid hazards.
Safety permits to be prepared in advance and obtain approval as per the site safety requirements.
Isolation of the area, and warning signs displayed as necessary for any testing and energizing.
Ensure all concerned personnel shall use PPE and all other safety items as required.
Notification of any witnessing of Pre-commissioning & Commissioning activities shall be forwarded to Safety Team two (2) working days prior to commencement of activity.
Compliance in accordance with the relevant specification reference for the Project Health & Safety plan.
Preliminary Checks for Water Leak Detection System
This activity is the responsibility of and shall be completed by QA/QC under direct supervision of client.
Make sure that all equipment and/or systems are completely ready for pre commissioning activities.
Check List for Readiness of the Water leak Detection System:
whether system is installed as per approved drawings and design.
Ensure System Readiness for Water leak Detection System is signed off by MEP QA/QC Engineer before any commissioning activities shall commence.
Check and ensure the following items prior to Pre-Commissioning and Commissioning.
Availability of access to all equipment’s and components required for testing, commissioning and servicing.
Ensure that the system is complete and conforms to the design drawings and specifications.
Check instruments, which are going to be used for testing are calibrated and certified by the approved laboratory.
Copies of certificates are to be forwarded to the commissioning authority.
The manufacturer’s catalogs / O & M Manual should be available and read in conjunction with this procedure.
Pre-Commissioning Procedure for Water Leak Detection System:
Confirm correct cable used as per specification requirements.
Ensure that the water leak Detection Cable is laid above the raised floors in rooms where the water drips directly on to the cable.
Make sure that the leak detection cable is secure as per specification requirements.
Ensure that the signal tags are correctly placed on the leak detection cable connected to it.
Confirm all cable ends are correct and in compliance with specification.
Confirm location of Water Leak detection panel is correct as per the contract specifications and drawings.
Make sure that water leak detection test descriptions are agreed with the contract specifications, approved and available for review.
Test descriptions to be correlated with approved as-built drawings.
Pre-Commissioning Inspection Checklist
1. Commissioning procedures reviewed
2. System Completeness
3. Operation and maintenance information
4. Location of Water Leak Detection Panels
5. Control panel environmental conditions as per manufacturer’s guidelines
6. Installation of Sensing cable
7. Installation of the fixing clips
8. Installation of cable End Termination
9. Installation of Jumper cable clipped & secure
10. Terminations of the control panel
11. Panel interior clean
12. Control panel protected from excessive dust
13. Panels properly grounded
14. Correct source of power supply 220/240V
15. Provision for BMS interface
Commissioning of Water Leak Detection System
Ensure that all the pre-commissioning checks are carried out successfully and are approved.
All the panels are stand alone. Connect the Belden cable and Leak Detection cable using the FG-NIC kit.
Switch on the panel and ensure that the panel shows a healthy status upon the detection of water.
The panel should show the point of contact (measured in length from the panel) of water.
Check and ensure Water Leak detection Panel Integration with BMS through ModBus Communication Protocol.
Ensure Testing for water Leak Detection system is completed / signed off by MEP and specialist Engineers after which inspected and approved by Client QA/QC Engineer.
QA/QC Engineer shall be informed one (1) day prior to any witnessing.
As part of the assessment, the commissioning inspection procedures must ensure a quantitative or qualitative acceptance criteria for determining the prescribed activities have been accomplished satisfactorily.
The team should verify any as-built record of Water Leak Detection system testing and confirm that the information meets the project requirements.
Request for Work Inspection Request (WIR) shall be submitted by Commissioning Engineer to client QA/QC Department for verification and inspections.
Commissioning Engineer will forward WIR for inspection and approval in accordance with the approved commissioning plan.
Commissioning Inspection Checklist
1. Commissioning procedures reviewed
2. Operation and maintenance information available
3. Function of the panel is OK
4. Function of the leak detection system is OK
Health & Safety Requirements
A task based risk assessment and mitigation strategy is summarized in the risk assessment form.
Work will commence as per safety regulations laid down in the contract specification and project safety plan.
Safety gears shall be used. All personal protective equipment shall be used as appropriate according to the nature of the job.
For electrical works, provide nonconductive tools and PPE.
Working on live power cables /equipment is not allowed.
ELCB shall be used in temporary panel boards; industrial connectors / sockets for temporary power cable connections.
Safety lights will be used in case of power failure ensuring the good illumination of the working area to aid evacuation if necessary.
Adequate lighting shall be provided to ensure the good illumination on the working area.
Work will be executed through Permit to Work system.
Workers working at height to wear their full body harness and should be anchored to a rigid point.
Nobody is allowed to stand on the top of the step ladder; worker should stand two rungs below from top of the step ladder. A co-worker must hold the step ladder while in use.
Work inside shafts are not allowed without work permit and supervision.
Work areas to be provided with proper lighting and ventilation at all times.
Store tools and equipment and unused materials stacked in a safe area at the end of the workday.
Method statement / Risk assessments to be briefed to all concerned personnel and signed as read understood.
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