Coway AP-2021A Gray User Manual page 27

- How to replace double HEPA filter(4D)
1. Remove the packaging vinyl from the new double HEPA filter(4D) and unfold the double HEPA filter(4D).
＊ If you are using the smoke and allergen filter, assemble it to the double HEPA filter(4D).
2. Settle the double HEPA filter(4D) and
4D pre-filter on the filter tray in the
reverse order.
3. Push the filter tray fully to the product and mount the back cover.
Adjust the top of the back cover into the groove and push it to mount it.
＊ When closing the filter tray, be careful not to push the product.
＊ The product will not operate if the back cover is not fixed correctly.
Maintenance
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