Method Statement Title: Installation of pressurization Fans
1.0 Scope
- This method statement outlines the method of storage, handling and installation of Pressurisation Fans and accessories as specified in the Section 15800.
- Application
- Pressurisation of staircases and lift wells/core.
- Material
- Pressurisation Fans.
3.2 Threaded rods, fasteners for supports.
3.3 Duct flexible connections.
3.4 Electrical cables, controls and accessories.
- Method
- Receiving
- On arrival at site all Fans shall be checked for quantities, type and model number, physical damages, and notify the supplier of any discrepancies. After completion of inspection, fan shall be stored properly with protective covering.
- Any items found damaged or not suitable as per the project requirements shall be removed from site. Until such time, the damaged/non-compliant material shall be clearly marked and stored separately to prevent any inadvertent use.
- Storage
- While unloading the fans shall be carefully and slowly lowered to the ground. Adequate manpower will be engaged according to the size of the fan. Upon completion of receiving QC inspection, the fans will be segregated model/size wise and stacked accordingly for easy retrieval.
- Fans shall be stored on a flat surface in well ventilated and covered storage area.
- Manufacturer’s instructions shall be strictly followed as applicable.
- While stacking the fans, ensure that bottom most fan packing shall not be damaged.
- Store Keeper will be responsible for proper storage and maintenance of records, as required.
- Preparation
- Check and ensure all drawings used for installation are latest and approved for construction.
- For Floor Mounted Fans
- Check the fan’s foundation and ensure it is as per approved drawings.
- Check the area around the foundation and ensure access to the fans from all sides as applicable.
- Check the foundation surface and it shall be smooth and even finish to avoid any dust accumulation.
- The foundation surface shall be cleaned before installation of fans.
- Mark the fan’s position on the foundation.
- Fix the anti-vibration mounts/pads as applicable as per approved drawings/submittals.
- For Ceiling Suspended Fans
- Check and ensure that clearance and proper access is available at the place of installation.
- Mark the support locations as per approved drawings/manufacturers details and fix the approved anchor fasteners in the slab.
- Fix the hanger rods and supports as per manufacturers instructions.
- Provide anti vibration isolators as applicable as per the approvals.
- Ensure easy access and sufficient clearance for maintenance and removal of fan/motor.
- Installation
- Floor Mounted Fans
- Shift the fans to the place of installation in safe manner using hand trolley, fork lift/crane as applicable. Sufficient manpower will be engaged as required for safe shifting and installation.
- Ensure that the correct fan is shifted to the place of installation.
- Ensure air inlet and outlet connections orientation are as per approved drawings.
- Fix the flexible duct connector to fan inlet and outlet as per approved drawings/manufacturers instructions.
- The fan is placed correctly on foundation with anti vibration mounts (if applicable) at the right location.
- The fans will be properly levelled and parallel to room walls/other installations.
- Fans shall be inspected again for any damage during hoisting/shifting and installation.
- Clean the interior of the fans.
- Follow the manufacturer’s instructions while installing the fans.
- For Ceiling Suspended Fans
- Shift the fans to the place of installation in safe manner using hand trolley, fork lift/crane as applicable. Sufficient manpower will be engaged as required for safe shifting and installation.
- Ensure that the correct fan is shifted to the place of installation.
- Ensure air inlet and outlet connections orientation are as per approved drawings.
- Fix the flexible duct connector to fan inlet and outlet as per approved drawings/manufacturers instructions.
- Lift and install the fan carefully on the supports. Engage sufficient manpower and equipments as required for safe installation.
- Check the level of the installation in co-ordination with other services and approved drawings.
- Cut and trim the support rods after finalising the levels. Leave 25mm extra length of support rods for final adjustments. Threaded rod ends to be painted zinc rich primer
- Remove burrs and sharp edges if any.
- Fans shall be inspected again for any damage during hoisting/shifting and installation by ETA QA/QC.
- Clean the interior of the fans.
- Follow the manufacturer’s instructions while installing the fans.
- All open ends to be sealed.
- Air side and Electrical Connections
- Air side connections
- Ducting connection shall be done as per approved shop drawings.
- Provide proper supports as per approved drawings.
- The weight of ducting shall not act on fans.
- Before making final connections to fans ensure inner area of fans is clean, especially the impeller of the fan.
- Electrical connections
- Electrical power connections shall be done as per approved drawings.
- Cables shall be installed, terminated and tested as per approved method statement Ref;ETA/MS/E/015.
- BMS interfacing
BMS interfacing shall be done as defined in Material Submittal No.NMX/BDR/4045/GEN/CD/10809 dated 10.10.04 (ETA 024, Rev.3)
- Inspection
- QC inspection shall be carried out as per the installation checklist and manufacturer’s instructions.
- Work Inspection Request shall be raised for consultant’s inspection.
- Inspection shall be recorded in the approved format.
- 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 fans installation work.
- The people involved in 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.
- Reference
- Manufacturers catalogue.
- Approved submittal.
- Approved shop drawings.
- Specification section 15800.
- Records
- `Work Inspection Request’ duly signed by the Consultants.
8.2 Signed off Fan’s installation checklist.
- Attachments
9.1 Installation check list for Pressurisation Fans.
