1. Open the front cover. Pull the top of the front cover to open it.

2. Take out the filter and remove the packaging's plastic wrapping.
Remove the packaging plastic from all filters except the pre-filter and assemble the product according to
the filter assembly sequence.

3. Close the front cover.
Align the two projections on the bottom of the front cover with the grooves and push in the cover to fix it.
＊ The product will not operate if the front cover is not fixed correctly.