RAMS For Installation of Fire Alarm System and PAVA System [PDF]

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RISK ASSESSMENT METHOD STATEMENT



Method Statement and Risk Assessment for the Installation of Fire Alarm System & PAVA System The Al Karama School, Phase 2 Abu Dhabi, UAE Project No. M1492 Document Ref No: M1492-MCL-MCL-MSS-028



Title: Project: Prepared By:



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 1 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT



Project name



Al Karama School, Phase 2



Project No



Main Contractor



McLaren Construction LLC



Document No



M1492 M1492-MCL-MCLMSS-028



Installation of Fire Alarm System & PAVA System



Revision No



00



Date of issue



10/06/2020



Document Prepared By



Anu Baby



Proposed start date



30/06/2020



Duration of task



6 Months



Title/Task



Contents Section A Section B Section C Section D Section E Section F Section G Section H Section I Section J Section K Section L Section M Section N Section O Section P Section Q Section R Section S Section T Section U



Register of Revisions Scope of Works to be undertaken Location of the Project Location of the Works to be Undertaken with the Project Site Access/Egress and Access to the Work Zone Emergency Contacts Details and Procedures McLaren Site Specific HSE Safety Induction Welfare facilities Personal Protective Equipment Plant/Equipment and tools to be Used Materials To be used Temporary Works Inspection and Test Regime Communication/Toolbox Talks/Training Requirements Works Permits Environmental and Waste Management Programme for the Works Housekeeping and Storage Working at Height Occupational Health Sequence of Works/Activities



Appendices Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F Appendix G



Site Logistic Plans and Other Design Information Relative to the Works Crisis/Emergency Plan COSHH Assessments and Material Data Sheets Risk Assessments Technical Information Inspection and Test Plans Third Party competency/certifications



Title: Project: Prepared By:



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 2 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT



Section A - Register of Revisions Rev. No



Date



Reason for Amendment



Amended By (Name)



Signature



Has this amendment been briefed to the operatives involved and have the operatives signed the register?



This method statement has been prepared in conjunction with the following documents. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17.



Title: Project: Prepared By:



UAE Federal Law No. 8, chapter V, Article 91 of 1980. United Arab Emirate Ministerial Order 337/2, Medical care to Workers UAE Fire & Life Safety Code of Practice 2018. UAE Ministerial Order No. 32 of 1982. Federal Environmental Authority Law No.24/1999 and its supplements. Federal Law No. (20) of 1991 Concerning the Civil Aviation Law. Ministerial Resolution 688 of 2013, Regarding Fixing of Working Hours During Summer Dubai Municipality Code of Construction Safety Practice, 2007-2011 edition Dubai Municipality Technical Guidelines Local order No. 61 of 1991on Environment Protection Regulation in the Emirates of Dubai. Articles (3,4,5,7) Local Law No. 21/2005 (Waste Management) Local Order No. 11 of 2003 concerning Public Health & community Safety in the Emirate of Dubai OSHAD Code of Practice, HSE Regulations, Technical Guidelines, Mechanisms ISO 45001:2018, ISO 14001:2015 ISO 9001:2015 McLaren’s Integrated Management System Policy Statement McLaren Management Procedures (MMP) and Function Procedures McLaren’s site specific SHEQ Plan



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 3 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT Section B- Scope of Works to be undertaken: The work Describes Installation of Fire Alarm system and PAVA System at Al Karama School, Phase 2, Abudhabi The following Critical Hazards have been identified during the preparation of the scope of works, please refer to the Risk Assessments within Appendix D.



1. Falling from height. 2. Manual Handling. 3. Slip Trips and Falls. 4. Falling objects 5. Use of power tools



Section C- Location of the Project Location of the Project; The Project premise is located at Al Rowdah, W14-01, Abu Dhabi as marked below.



Title: Project: Prepared By:



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 4 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT



Existing Services As per current information, there is existing irrigation network passing outside the construction work area. Underground electrical cables for existing lighting poles within the plot have been removed prior to commencing works at the area. A full survey has been undertaken to confirm this including an underground service scan and trial trenches hand excavated in various locations around the project to locate any services running into, or close to the plot.



A permit to dig must be obtained from McLaren prior to any excavations commencing. Title: Project: Prepared By:



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 5 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT



Section D- Location of the Works to be Undertaken within the Project



Section E- Site Access/Egress and Access to the Work Zone



Section F- Emergency Contacts Details and Procedures: The following staff from McLaren and will be on site during the execution of the works and will be responsible Title: Project: Prepared By:



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 6 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT for managing the works; Name Paul Carlin (Visiting) Jamie Selway (Visiting) Kavith Rathi Abdul Mutallib Vignesh Prabakar Nesakumar P Vishnu Mohan Anu Baby Prabir Kumar Mohmmed Jasim Parthipan Clitus



Position Operations Director QHSE Manager Sr Site Engineer Senior HSE Officer Site Engineer MEP Engineer Project Manager Project Engineer HSE Officer Mechanical Engineer Design Engineer(Elect) Fire Warden /First Aider



Company McLaren McLaren McLaren McLaren McLaren McLaren Genfocus Genfocus Genfocus Genfocus Genfocus Genfocus



Contact Details 056 105 4691 052 173 6235 055 190 6842 055 400 0602 058 621 6731 050 850 7968 056 546 5865 056 546 5807 054 793 7312 056-526 8312 056-546 5812 052 701 4049



In case of an Emergency/fire Alarm, all operatives, Staff and Visitors are required to report to the Assembly Point, which is indicated on the site logistics drawing, as indicated by the symbol below. A roll call will be taken, and registers checked to ensure that everyone is accounted for. No one will be allowed to leave the assembly point until the Emergency Response Controller confirms that it is safe to do so. Assembly Point Please refer to the attached Crisis/Emergency Plan, (Appendix B) which is to be implemented where the need arises. The Qualified First Aiders for the Project are listed below, and the first Aid Boxes will be available within the First Aid Room and in the Main Office Reception. McLaren: (details of First Aiders) Shebin Arun



056 746 5229



Authority/Company



Abdul Mutallib 055 400 0602 Police Please see Ambulance Emergency Fire (Civil Defence) SKMC Hospital McLaren Site Emergency No.



Subcontractor (Details of First Aiders) Prabir Kumar



054 7937312



Contact Telephone No. 999 Cletus 998 997 02 819 0000 056 898 7960



052 7014049 below the contact details:



Section G- McLaren Site Specific HSE Safety Induction: All those working on or visiting the Al Karama School, Phase 2 Extension project will be required to undergo a McLaren site specific HSE induction before being allowed on site. The induction will be held within the project premises and carried out by McLaren’s HSE Representative or a Construction team member, the induction Title: Project: Prepared By:



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 7 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT includes details of the site Emergency Procedures. On completion of the HSE induction, those involved in this activity will be briefed on the contents of the RAMS by their respective Site Engineer or Supervisor. They will then be required a sign a RAMS Briefing Register (SAF019 UAE) confirming that they have been briefed and that they fully understand the RAMS and what is expected from them during the execution of the works. Any operative who will be operating any plant or equipment will be required to produce a copy of their Dubai/ Abu Dhabi Municipality/ENAS/EIAC approved competency certificate/card and proof of health to enable McLaren to issue them with the Plant Operators Authorisation (SAF023 UAE).



Section H- Welfare facilities: Drinking WaterClean drinking water stations will be provided on site (Water coolers will be brought to site until permanent water stations are installed) and all operatives are to ensure they take on enough fluids throughout the day and comply with the Summer Working Plan.



Rest areas and toiletRest areas and toilets are provided on site and located as per the Al Karamah School, Phase 2 Extension Project logistics layout plan.



Section I- Personal Protective Equipment (PPE) The Following Personal Protective Equipment must be worn/be available during the execution of the works activities



Type of PPE Required



Yes



Safety Helmet Safety Footwear Eye protection Gloves Hi- viz Vests Overalls (for operatives only) Ear protection Face Respirator Body Harness Respiratory masks Others (other specific requirements)



No



X X X X X X X X X X X



Please ensure that any specific precautions for PPE as identified within MSDS/COSHH assessment or any specific requirements by supplier/manufacturer are to be complied and adhered to.



Section J- Plant and Equipment to be Used



Title: Project: Prepared By:



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 8 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT It is anticipated that the following Plant and Equipment will be used during the execution of the works; other items will also be identified on the schedule below; 1. Hand tools with Multimeter 2. Drill Machine and Grinder 3. Testing Kit *Note: All relevant competency certificates to be submitted to HSE Manager/Eng./Advisor prior to start of any activity.



Type of Plant/Equipment to be Used Lifting Mechanical hoist Mobile elevating working platform Ladder Hoist Test Equipment Task Lighting Scaffolding Mobile scaffolds Podium Scaffold



Yes



No X X X



Type of Plant/Equipment to be Used Cradle Skid Steer Loader Hand tools Electrical tools CAT & Gen Set Ventilation/Extraction Equip Pump Lifting slings/chains Tele Handler Others: Mobile Crane



X X X X X X X



Yes



No X X



X X X X X X X X



Section K- Materials To be used. The following Materials will be utilised during the execution of the works, the Material Data sheets being provided, which will allow the relevant COSHH assessments to be carried out; (See Appendix C) Item



Material Description



MSDS Attached?



COSHH Assessment Attached?



1Section L- Temporary Works 2The following Temporary Works have been identified as required for this activity: 3 4



No Temporary works included in this RAMS *Note: All temporary Works require a design completed by a competent person and must be approved by McLaren’s Temporary Works Coordinator (TWC) **Note: All Temporary Works require a Temporary Works Permit to Load/ Strike Section M- Inspection and Test Regime >



Section N- Communication/Toolbox Talks/Training Requirements: Before starting any activity, a Point of Work Risk Assessment will be carried out by the Site Engineer/ Supervisor to ensure all risk and controls have been identified, this will be followed by a task briefing carried out in the Title: Project: Prepared By:



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 9 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT language of the team. All members of the team must sign the briefing sheet to confirm that they have understood the task requirements. During the Preparation of this RAMS the following training for the staff and operatives has been identified; Item Description of Training Has the Training been If not, when will be completed? (Yes/No) completed (Date) 1 2 3 4 5



Work at Height Using Abrasive wheel Manual Handling Scaffolding inspection and scaffolding erection Working with Power Tools



Yes Yes Yes Yes Yes



*Note: All relevant certificates will be submitted prior to works commencing or during induction. Where the training has not been carried out, it must do so prior to the works/activities commencing.



Section O- Works Permits The following works permits will be required during the execution of the Works; Item



Description of the Work Permit



Permit Issued By



1 Permit to Enter Confined Space 2 Permit for Lifting Operations. 3 Permit to Dig 4 Permit to work Hot cutting or Welding 5 Permit to Work in Ceiling Void 6 Permit for Roof Access 7 Permit to Work with Ladders, steps/scaffold 8 Permit to Work at Height 9 Permit to Work – Electrical above 110V 10 Permit to Work with COSHH Items 11 Permit to Work at External Face of The Building 12 Permit for Removal of Existing Fall Protections 13 Permit for Pressure Testing 14 Other Permit Any other permits if required to be added



Tick only applicable



McLaren McLaren McLaren McLaren McLaren McLaren McLaren McLaren McLaren McLaren McLaren McLaren McLaren



   



Section P- Environmental and Waste Management: Labelled skips will be provided by McLaren, all waste must be segregated into the correct waste streams and placed in the skips provided. It is important that waste is reduced, reused or recycled wherever possible. Toolbox Talks will be regularly briefed to the workforce to ensure this is understood.



1 General Waste 2. Concrete Waste 3. Wooden Waste 4. Food Waste 5. Hazardous Waste 6. Paper / Cardboard Waste



Title: Project: Prepared By:



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 10 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT Due to the nature of the works and the current site conditions, water shall be sprayed onto dirt/sand roads so as to minimize dust pollution. Where any plant is used, drip trays shall be placed underneath to catch any spilled oils or fuels. Oils and fuels will be managed in accordance with the MSDS and the site Waste Management Plan. All hazardous liquids must store in suitable, labelled containers with secondary containment to prevent ground and water contamination. Emergency spills kits must be available where any hazardous material is used.



Section Q- Programme for the Works. 6 Months



Section R- Housekeeping and Storage: Housekeeping will be carried out as and when required and storage of materials will be located as per the approved site logistics plan. Combustible materials will be carefully managed and monitored in order to reduce the risk of fire.



Section S- Working at Height During the preparation of the RAMS, the following activities for working at height have been identified and have been addressed within the risk assessments within Appendix D. (to be filled if applicable to your works) Item Activity Risk Assessment Reference 1 Working at Height Attached 2 Working at Mobile Tower/Podium Ladder Attached`



Section T- Occupational Health During the preparation of the RAMS, the following Occupational Health issues have been reviewed and addressed within this Method Statement. Item 1



Description Safety Critical Roles



2 3



Bad Back/sprain due to improper Manual handling Hand/Arm Vibration



4



Construction dust



5



Noise



6



Sun & Heat Title:



Project: Prepared By:



Preventative Measures, (see also within the Risk Assessments) Anyone identified as safety critical (i.e. operators, riggers, scaffolders, banksmen etc.) must have a medical check-up before starting work A manual handing assessment will be carried out for all activities and all Operatives will receive Manual Handling training Exposure Action Values (EAVs) will be calculated for all vibration activities. Where required, job rotation will be put in place and recorded Roads shall be watered to minimise dust and housekeeping to be carried out regularly. RPE shall be provided for those at risk from hazardous dust Noise values will be monitored. Where required, job rotation will be put in place and recorded. Where it is not possible to control noise, PPE will be provided Sun creams will be provided for those that require it. Drinking water and electrolyte additives will be provided.



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 11 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT



7



Skin



Clothing shall cover legs and arms, gloves will be worn. Summer Working Plans PPE shall provide as required by MSDS



Section U- Sequence of Works/Activities for Fire Alarm Installation RAMS to be briefed to all the operatives involved in the work STARRT card to be prepared by assessing the area of work prior starting the work. Supervisor to ensure all operatives have received a McLaren site basic induction Supervisor to ensure all operatives have adequate PPE for the job including Full body harness. Supervisor to ensure all operators having Competent certificate. Supervisor to ensure that the site is clean and ready to start the work Supervisor to ensure adequate tools are provided and should be visibly clean and tidy. Advise Site manager if more tools are needed. Supervisor to ensure that all hygienic PPE has been issued & being worn correctly. Supervisor to ensure that proper barricade and warning signs are provided before starting any activity. Supervisor to ensure proper working platforms such as ladders are being used and make sure that having ladder permit on work Transportation to site will be as per site requirement. Timing to be agreed with McLaren Ensuring that unloading of materials is undertaken in designated area. When offloading the materials precaution to be taken to avoid damages.



Installation Procedure        



All materials received at site shall be inspected and ensured that the materials are as per approved material submittal. Any discrepancies, damages etc. shall be notified and reported for further action. Material found not suitable for the project shall be removed from site immediately. All the Fire Alarm System Outstations, Modules & Control Panels etc. shall be stored in an air conditioned place. 25 mm PVC conducting for concealed installation. For surface installation, FP200 cable will be clipped on the soffit on the slab in false ceiling and non-false ceiling areas. The containment system for Fire Alarm system is being used wherever required and also near the Fire Alarm control panels. Correct type of back boxes for all the outstations should be installed as per approved shop drawings / material submittals. The mounting heights for the Junction boxes should be verified with approved shop drawings. Containment System should be offered for QC verification prior to cabling works. All the related documents like latest approved shop drawings and schematic etc. should be available with installation team.



Site Installation Method Statement      



The required amount of cable should be transferred from Stores to Site access point by pick-up and to the particular floor with wheelbarrow as required to the work place. The correct size and type of cable should be identified and cut to the required length. All the cables should be clipped in surface or installed in concealed PVC conduit or G.I. Tray only. Proper identifications to be provided for loop in / loop out of Fire Alarm cables. The earth cables to all the outstations to be properly terminated with earth sleeve in the appropriate terminal in order to avoid any earth fault in the loop. The junction boxes and back boxes to the outstations such as smoke detectors, manual call points and modules should be installed as per the approved shop drawings.



Title: Project: Prepared By:



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 12 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT               



Installation of system outstation should be offered for QC Verification. Adequate additional cable lengths to be provided during cabling for the detectors, which are coming in False ceiling. All the cables to be terminated in the outstations with proper screw driver and as per the identifications provided in the cables. No joints are allowed in between two outstations. All the Fire Alarm control Panels such as Main Control Panels, Mimic Panels, Repeater Panels should be installed as per approved shop drawing. Installation shall be offered for QC verification. All Smoke Detectors to have cover on it after installation and before handing over of the area, in order to avoid any physical damages / accumulation of dust within the Smoke Detectors. All cables to be properly identified in Fire Alarm control panel before termination. Installation of Beam sensors to be as per the approved shop drawings / Manufacturer’s recommendations. Installation of Duct detectors to be as shown in the approved shop drawings. Work Inspection Request shall be raised for Consultant’s inspection and sign o􀄄 The devices/peripherals (Smoke detectors, heat detectors, break glass, duct detectors, beam detectors, control and monitoring modules) are connected in Class A circuit with the Control panels. The speakers & speaker with strobes are connected in Class A circuit with the Control panels. 2 Core 1.5mm2 FP 200 cable to be used for cabling the Initiating Device Circuits (IDC) to the panel, additional 2c x 2.5mm2 FP200 cable is required for the smoke detector with sounder base for the activation of the sounders units. 2 core 1.5mm2 FP 200 cable to be used for cabling the Speakers with the panel, additional 2c x 2.5mm2 FP200 cable is required from the FACP for the speaker with strobe for the activation of the strobe unit allied in vertical walls the run of conduit will be kept straight. Comply with NFPA 72 for installation of fire-alarm equipment.



Smoke- or Heat-Detector Spacing    



Comply with NFPA 72, “Smoke-Sensing Fire Detectors” & “Heat-Sensing Fire Detectors”. Smooth ceiling spacing shall not exceed 30 feet (9 m). Fire-Alarm Control Unit: Surface mounted, with tops of cabinets not more than 72 inches (1830 mm) above the finished floor. Annunciator: Install with top of panel not more than 72 inches (1830 mm) above the finished floor.



Wiring & Connections Requirements  Verify that hardware and devices are NRTL listed for use with 􀄆re-alarm system before making connections. Make addressable connections with a supervised interface device to the following devices and systems. Install the interface device less than 3 feet (1 m) from the device controller. Make an addressable confirmation connection when such feedback is available at the device or system being controlled.  Alarm-initiating connection to smoke-control system (smoke management) at fire-fighter smoke-control system panel.  Alarm-initiating connection to stairwell and elevator-shaft pressurization systems.  Smoke dampers in air ducts of designated air-conditioning duct systems.  Alarm-initiating connection to elevator recall system and components.  Alarm-initiating connection to activate emergency lighting control.  Alarm-initiating connection to activate emergency shutoffs for gas and fuel supplies.  Supervisory connections at valve supervisory switches.  Supervisory connections at low-air-pressure switch of each dry-pipe sprinkler system.  Supervisory connections at elevator shunt trip breaker.  Supervisory connections at fire-pump power failure including a dead-phase or phase reversal condition.  Supervisory connections at fire-pump engine control panel.



Fault Finding in Fire Alarm System Battery Charger Faults Battery Charger Faults that can arise during the operational lifetime of a panel. You may observe one of the following Faults;



Charger 2% out of range



Title: Project: Prepared By:



Installation of Fire Alarm System & PAVA System



Ref. No:



Al Karamah School, Phase 2 Anu Baby



SAF-098 (UAE) 03/20 Rev I



Approved By:



Vishnu Mohan 13 of 23



M1492-MCL-MCL-MSS-028



Rev. No:



00



Rev. Date:



00



RISK ASSESSMENT METHOD STATEMENT



RISK ASSESSMENT METHOD STATEMENT    



Battery Charger Supply incorrect to correctly measure the output voltage you will need to follow the steps below. To prevent damage to the system, disconnect the batteries & power down the system, disconnect the power & harnesses from the Power Supply. Connect the Multi-meter to the battery leads (with batteries disconnected), power up & measure the voltage. Calculate the difference between the measured voltage & 27.6v. NOTE: After 90 seconds, the voltage will drop to