SOP for Operation of AHU

Objective: To establish a standard operating procedure for Air Handling Unit (AHU)

Scope: This SOP is applicable for all the AHUs of (Company Name).

Responsibility
Operator shall be responsible to follow the procedure strictly.

Supervisor shall be responsible to ensure that the SOP is followed properly.

Accountibility: Head of Engineering

Precautions
1 Concerned personnel should be trained on the SOP
2 Clean the outer surface of the AHU before starting
3 Check the door of the AHU. It should be closed properly.
4 Check the position of chilled water inlet and outlet valves. They should be open. Check that the bypass valve is closed.

Procedure
6.1 MANUAL OPERATION: Start-up procedure: Following works shall be done sequentially to start the AHU
6.1.1 Seclector switch of the MSSB panel shall be turned at “ manual mode”
6.1.2 To start the AHU, Turned “ON” the selecter switch from the AHU control pannel. Then the AHU will start in Manual mode.
Shutdown procedure: Following works shall be done sequentially to shutdown the AHU
6.1.3 To stop the AHU, Turned “OFF” the selecter switch from the AHU control pannel. Then the AHU will be stoped.
6.1.4 Seclector switch of the MSSB panel shall be turned at “ off mode”
6.2 OPERATION THROUGH BAS SYSTEM: Star-up procedure: Following works shall be done sequentially to start the AHU
6.2.1 Seclector switch of the MSSB panel shall be turned at “ auto mode”
6.2.2 Seclect the window “ NETWORK MAP-BCD” From the BAS control computer screen,
6.2.3 Then double click on “AIRCOND”
6.2.4 Select the AHU location GR-FLR / FIRST-FLR / ROOF-FLR by double click
6.2.5 Select the reqired AHU No. by double click
6.2.6 Click the right button on “Supply Fan Command” and select auto mode.
6.2.7 Check the AHU fan status. It should be “ON”.
Shutdown procedure: Following works shall be done to shutdown the AHU
6.2.8 Click the right button on “Supply Fan Command” and select off mode. Then AHU will be stoped

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