Video: Aprilaire 4330 Humdifier Pad Frame Scale Control Insert

Aprilaire 4330 Humdifier Pad Frame Scale Control Insert Product Information and Installation Assembly
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I’m Jay, and this is the Aprilaire 4330 scale control insert, commonly called a filter or pad frame. It is located on the inside of the humidifier, and surrounds the water panel. The purpose of the frame is to prevent mineral build-up inside the humidifier cabinet, and divert excess water to the drain. The distribution tray on top of the pad frame is available separately. The pad frame should be replaced every five to eight years - sooner if the frame is cracked or damaged. This item is also available as part of the maintenance kit for your model.

Replacement is easy. Here’s how.
Be sure to turn the power off before performing any maintenance.
Before performing this service, it is necessary to shut off the water. Find the saddle valve, turn it clockwise until it stops.

These components are common to most Aprilaire humidifiers. The parts in your model may look slightly different, but the assembly procedure is similar. The plastic components should be washed using mild soap and water prior to replacing the water panel, which must be replaced annually.

On the back of the box, you’ll find clearly printed instructions for all the models. You’ll notice one edge of the water panel has a spray paint mark, that indicates the top. Let’s slide this together. Now, this particular scale control insert has notches cut into it. Those notches line up with the tabs on the distribution tray. The assembly is now complete.

This is the other style scale control insert. It’s a complete square, and the distribution tray that matches it, it snaps in similar to the other one. Now this assembly is complete. There’s a little loop here, that part goes towards the inside of the humidifier, and this side goes towards the furnace.

Thank you for watching. For this and other products, visit us at aprilaireparts.com.




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