Inspecting the ATO Reservoir and Testing the ATO Pump

Some locations may choose to do this procedure on a more frequent basis (i.e., quarterly, semi-annually, or other frequency).

Only perform this procedure when the unit is cool or severe burns may result.

NOTICE -

During installation and reassembly be sure to apply oil to all O-rings to lubricate and to help prevent tears and oil loss. Visually inspect O-rings and replace if worn or damaged.   Every 90 days replace O-rings. Remove O-rings from their groove and install new O-rings by gently rolling into place and lubricating with oil.   Use a small blunt object to gently pry O-rings from their groove to inspect for damage. Install by lubricating then gently rolling them in to place.

Ensure the ATO reservoir is undamaged and working within specification by doing the following:

1. Pull the ATO reservoir out as far as it can go.

2. Slide it slightly to the right and lift. INFO: This step releases the reservoir from the track beneath it, allowing the ATO reservoir to slide the rest of the way out. Be careful not to spill oil.

   

3. Inspect the three o-rings at the rear of the reservoir and replace o-rings that are missing, excessively worn, or damaged.

4. Reinstall the ATO reservoir by lining up the guides at the bottom of the reservoir with the tracks.

5. Press and hold the menu button until *MAIN* appears on the display.

6. Press the number one product button to enter the filter menu.

   

7. Press the right arrow until 6. FILL <- ATO displays.

8. Reinstall the condensation drain pan.

9. Continue to the next inspection or reinstall components as applicable.