Filter Media Choked at the Air Terminal
Air Handling Unit and Fan Coil Unit Problem 4
Choked Filter
Bent Aluminum Fin
Design
Provide locations for intake and return air terminals. Conform to the minimum filter requirements with regard to the use of air filters for cleaning outdoor air (MERV) so that no unfiltered air can enter the air handling system.
Follow the recommended use of a secondary filter of 80% dust spot efficiency.
Provide sufficient access space for easy cleaning and replacement of filters.
Construction
SS 652: F.6.3.2.1
Carry out an alternative efficiency test method for filters in accordance with ISO 29463-5 or equivalent.
SS 652: F.6.3.2.2
Performa a one-time vet airflow test during commissioning and keep proper record of the report to ensure the cooling capacity is adequate in accordance with design load in accordance with applicable statutory and regulatory requirements, and that the noise level in accordance with applicable statutory and regulatory noise pollution standards.
Maintenance
SS 652: F.11.4.2.1
Monitor air pressure and pressure drop across the filter and replace the filter when needed. If the filter is heavily dented, the filter should be replaced.
SS 652: F.11.4.2.2
Carry out leakage test to test filter for local penetration in accordance with ISO 29463-1.
SS 652: F.11.4.2.3
Carry out monthly checks and observe the dust accumulation level in ducts or grilles.