How to upkeep ffu fan filter unit and replace hepa filters?

Описание: Precautions for upkeeping FFU fan filter unit
1. According to the cleanliness of the environment, the FFU fan filter unit replaces the filter (the primary filter is generally 1-6 months, the hepa filter is generally 6-12 months, and the hepa filter cannot be cleaned).
2. Regularly use a dust particle counter once every two months to measure the cleanliness of the clean area purified by this product. When the measured cleanliness does not match the required cleanliness, the reason should be identified (whether there is leakage, whether the hepa filter is failure, etc.), if the hepa filter has failed, it should be replaced with a new hepa filter.
3. When replacing hepa filter and primary filter, the FFU fan filter unit should be stopped.
Precautions for replacing hepa filter in FFU fan filter unit
1. When replacing the hepa filter in fan filter unit, special attention should be paid to ensuring that the filter paper is intact during unpacking, transportation and installation. Do not touch the filter paper with your hands to cause damage.
2. Before installing FFU, point new hepa filter to a bright place and visually observe whether hepa filter is damaged due to transportation or other reasons. If filter paper has holes, it cannot be used.
3. When replacing hepa filter, should lift FFU box at first, then take out failed hepa filter and replace it with a new hepa filter (note that the airflow arrow mark of the hepa filter should be consistent with the direction of the airflow out of the purification unit), make sure the frame is sealed and return the box cover to its original position.