Method Statement Title: Installation of Fans (Central Exhaust)

Method Statement Title: Installation of Fans (Central Exhaust)

Scope

1. 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.