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Method Statement For Testing & Commissioning of Smoke Extract Fans

The document provides procedures for pre-commissioning and commissioning smoke extract fans. The pre-commissioning procedure involves 15 steps to check the fan installation and electrical, mechanical, and safety components. The commissioning procedure involves 12 steps including running the fan for 5 minutes, inducing a fire signal to test the fan in fire mode, measuring air flow, and recording performance readings. The purpose is to ensure the fans are installed and functioning properly according to project requirements.

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1K views2 pages

Method Statement For Testing & Commissioning of Smoke Extract Fans

The document provides procedures for pre-commissioning and commissioning smoke extract fans. The pre-commissioning procedure involves 15 steps to check the fan installation and electrical, mechanical, and safety components. The commissioning procedure involves 12 steps including running the fan for 5 minutes, inducing a fire signal to test the fan in fire mode, measuring air flow, and recording performance readings. The purpose is to ensure the fans are installed and functioning properly according to project requirements.

Uploaded by

lipson
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Method Statement for Testing & Commissioning of Smoke Extract Fans

The purpose of this procedure is to define the step-by-step method to implement the
correct practices for the pre commissioning & commissioning of Smoke Extract Fans
through the guidelines contained herein so as to ensure that the job execution complies
with the project requirements and serves the intended function to satisfactory level.

Pre commissioning Procedure for Smoke Extract Fans

1. Ensure that the extract fan installation is complete and mechanical completion is
approved.
2. Ensure that no damage has occurred between mechanical completion & pre
commissioning.
3. Repair all damages to the equipment finish paint.
4. Check the fan is installed as per the approved shop drawings and manufacturer’s
instructions.
5. Check by hand that the fan is rotating freely.
6. Check duct connections s per approved shop drawing and respective method
statement.
7. Check that the motor & the pulley are aligned & the belt tension is correct.
8. Check the connection of fan inlet & outlet are done with proper alignment.
9. Check the fire rated ductwork installation is complete & fire dampers are open.
10. Check for proper electrical power, control and earthing connections as per
manufacturer’s recommendations. Field wiring to be pre-tested for continuity and
insulation resistance.
11. Check the internal & external surface of the fan is cleaned.
12. Check the fan impellers are statically & dynamically balanced.
13. Set earth leakage and overload relays as per motor nameplate rating.
14. Check the interface of fan with fire alarm & BMS system.
15. Check the identification & labelling of fan & ductwork.

Commissioning Procedure for Smoke Extract Fans

1. Ensure that all the pre commissioning checks are carried out successfully.
2. Start the fan for a moment & check the direction of rotation of the fan / motor is
correct.
3. Upon ensuring correct direction of rotation, start & run the fan for 5 minutes in
normal condition.
4. Check for any undue vibration or noise.
5. Induce a fire signal from a floor through the Fire alarm control panel & check the
working of the fan in Fire condition.
6. Check the Motorized fire damper in the subject floor from where the fire signal is
induced is open & all other fire dampers are closed.
7. Check the damper to the FAHU is closed & the normal extract air passage dampers
in all the floors are closed.
8. Measure air flow in the main smoke extract air duct and adjust, if required to set
design value.
9. Check any control / safety devices for proper functionality.
10. Check & record the current & voltage on all phases.
11. Check & record the static head.
12. Record all readings in the final performance check list reference no.

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