475604 | Pentair ETI 400 Gas Heater Air Orifice

To install the Direct Air Intake Kit , the steps are as follows:
1. Remove the side panel from the heater to access the Vent Terminal (see illustration below). Using a flat-blade screwdriver, insert press and turn the screwdriver to unlock the panel.
2. Remove the Air Intake Vent cover from the top of the heater.
3. Insert the spigot part of the street wye up through the air intake hole in the top panel.
4. Insert the 45° elbow into the 3 in pipe section of the assembly that has the street wye.
5. Adjust the 45° elbow to align each 3 in pipe section with the air orifice.
6. Push the air intake assembly into the air orifices. Note: Be sure the top part of the elbow is concentric to the air intake hole in the top panel.
7. Place the 3 x 4 in reducer to the street wye plate of the elbow and secure it with the 3 sheet metal retaining screws.