Method Statement Title: Installation of Fans (Central Exhaust)
Scope
- This method statement applies to the installation of Central Exhaust Fans as per the Specification Section 15800.
- Purpose
- Purpose of this method statement is to outline the method of storage and installation of Central Exhaust Fans.
- Material
- Exhaust fans.
- Ducting and accessories as per approved submittals/drawings.
- Electrical cables, control panel & other accessories if any, as per approved drawings.
- Method
- Receiving
- On arrival at site all Fans shall be checked for quantities, type and model number, physical damages, etc., and notify supplier of any discrepancies.
- Upon satisfactory inspection, the fans 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.
- 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 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.
- Clean the interior of the fans.
- Follow the manufacturer’s instructions while installing the fans.
- 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.
- Install the sound attenuators if applicable as per approved drawings and material submittals.
- 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 and terminated as per approved method statement Ref;ETA/MS/E/015.
- Inspection
- Work Inspection request shall be raised for consultant’s inspection and sign off.
- QC inspection shall be carried out as per the installation checklist and manufacturer’s instructions.
- 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
- `Inspection Request’ duly signed by the Consultants.
8.2 Signified off Fan’s installation checklist.
