- OBJECTIVE
- To lay down a procedure for Cleaning of Air Handling Unit (AHU) filters 20 Micron, 10 Micron , 5 Micron
- SCOPE
- This SOP is applicable to cleaning of Air Handling Unit (AHU) filters 20 Micron , 10 Micron, 5 Micron .
- RESPONSIBILITY
- Technical Supervisor / Engineer
- ACCOUNTABILITY
- Manager
- PROCEDURE
- Precautions
- Stop the Air Handling Unit and isolate power supply.
- Check the number of filters to be cleaned with respect to size, mesh and number.
- Handle the filters carefully. Follow the correct sequence of removing and fixing the filters before and after cleaning. First remove the 20 micron and proceed towards 5 micron. Repeat the sequence while fixing
- Don’t damage the filter medium, filter casing and tubular spacers
- Handle filters with care while bringing back to Air Handling Unit.
- Close the AHU service door after removing the filters for cleaning
- Pre start Up
- Check and note pressure drop across filter banks with help of Magnahelic gauge or data logger as applicable
- Position the filters on the chamber window of the filter cleaning equipment
- Tap the filter gently by hand / on floor with up stream (dirty) side facing down to floor to dislodge all loose particles.
- Operation
- Ensure filters cleaning room is cleaned and the filters checking equipment is in operation.
- Ensure that compressed air pressure is regulated between 1.0 to 1.5 Kg/cm2.
- Take out the filters as per numbering in sequential manner by starting from 20 micron.
- Ensure the service door is positioned back and closed after removing the filters for cleaning
- Ensure the dust collector blower is switched on and in operation.
- Ensure the compressed air Pressure is set to 1.0 to 1.5 Kg/cm2
- Direct the compressed air over the filters surface with an angle from one end to another corner on the total surface
- Ensure the filters is cleaned thoroughly by visual inspection
- Remove the filters from the cleaning chamber and check its cleanliness by means of measuring the pressure difference on he filter checking equipment as per SOP.
- Keep the filter in the plastic cover and shift to the AHU area
- Place the filters properly in Air Handling Unit with as per numbering and in the reverse sequence of removal
- Tighten all the bolts of the filters.
- Tighten all the bolts of plenum doors
- Close the service door.
- Switch on the main and start the AHU
- Check pressure difference across filters with the help of Magnehelic gauge/data
- Logger as applicable
- Check and note the conditions inside the rooms.
- Document the details of cleaning in the machine history card
- Frequency of Cleaning
- During product to product change over
- Whenever the Pressure drop across the filters exceeds 6 mm of WC
- During the Preventive Maintenance schedules completion
- Forms and Records (Annexures)
- Not Applicable
- Distribution
- Master copy – Quality Assurance
- Controlled copies- Quality Assurance, Production, Quality Control
- History
Date Revision Number Reason for Revision
– 00 New SOP
