Pentair ETi 250 - Direct Air Intake Kit Installation (Combustion Air Supply)

ETi 250 High Efficiency Pool and Spa Heater Installation and User’s Guide
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IMPORTANT: For indoor heater installations with Direct Air Intake duct using 4 in PVC duct it is required to order
and install the Direct Air Intake Kit (P/N 476371).
To install the Direct Air Intake Kit (see Figure 27), the steps are as follows:
1. Remove the side panel from the heater to access the Air orice intake (see illustration below). Using a at-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.
Figure 27.
3. Connect the long 3” diameter pipe to the 45° elbow.
4. Connect the short 3” diameter pipe to the other socket of the 45° elbow.
5. Connect the short 3” diameter pipe to the air orice socket. Make sure it is tight.
6. Install the 3"x 4" reducer to the long 3" pipe through the air intake hole in the top panel, see Figure 27.
DIRECT AIR INTAKE KIT (P/N 476371) INSTALLATION
Side panel
latch lock
3 in x 4 in
air Intake
reducer
Remove
air intake
cover
Step 4
Air Orifice
Installation
3” x 4” air intake
reducer
45° elbow
Step 1 & 2
Step 3
long 3”
diameter
pipe
Short 3” diameter pipe.