This page explains the Air + Hydro Therapeutic Massage + Hydro Foot Component Diagram With Digital Controller, published by Ella's Bubbles as air-hydro-hydro-digital.pdf in the walk-in-tub schematics folder (revision 10-16-23). It is the schematic for tubs that combine an air massage pump with two independent hydro pumps and use a digital controller, rather than plain push buttons, for the air and seat hydro systems. If your tub has a digital touchpad on the deck and the Air + Hydro + Hydro Independent Foot Massage package, this is your drawing. Below you will find which tubs the diagram lists, the seven numbered components, how the digital controller and the foot button divide the work, where the two hydro pumps and the in-line heater sit, the electrical requirements printed at the top, and a note about a second file name that serves the very same diagram.

Which Tubs This Diagram Lists

The "Available On" box prints Companion, Escape, Tub4two, Big4two, Shak, Big4one, Transfer60, and XXL. "XXL" is the schematic's short form for the TransferXXL. Notice how many two-seat tubs appear here: the Companion, Escape, Tub4Two, and Big4Two are all two-seater models, joined by the Big4One, the Shak, the Transfer60, and the TransferXXL. If you own one of these with the three-system package and a digital touchpad, this is the diagram to keep with your paperwork. Owners of the Royal, Monaco, Elite, and Capri with push-button controls should use the push-control version of this schematic instead.

The Seven Numbered Components

The legend along the bottom of the sheet lists seven components. They are reproduced below exactly as printed.

The legend refers you to your tub's technical drawing for the air jet count, since the count differs by model while this schematic is shared across eight of them. The air pump is a variable speed pump with Auto Purge: about 20 minutes after you turn the air massage off, it starts on its own and runs for 120 seconds to blow leftover water out of the air lines. That is normal and stops by itself.

Digital Controller for Air and Seat Hydro, Button for Foot Hydro

The key difference from the push-control diagram is in the ON/OFF entries of the legend. Items 1 and 2, the Air Massage System and the (seat) Hydro Massage System, are printed with "ON/OFF Digital Controller". Item 3, the Hydro Foot Massage System, is printed with "ON/OFF Button". So on a tub built to this diagram:

1. The digital controller on the deck turns the air massage and the seat hydro massage on and off. The drawing also shows a Hydro Massage Push Control wired alongside the digital controller for the seat hydro system.
2. The foot hydro massage is switched by its own separate button.
3. Both hydro systems keep their own Air Flow Hydro Massage Intensity Dial Control, one for the seat jets and one for the foot jets, so intensity is still set at the dials rather than on the touchpad.

The Digital Controller and the LED Light are wired to the Control Box, which carries the Load 1 and Load 2 outputs. As on the push-control diagram, Load 1 serves the Air Pump and its "Air Out to Jets" line, and Load 2 serves the Ozone Generator and its "Ozone Out to Hydro System" line. For a side-by-side look at the two control styles, see push controls versus the digital touchpad.

Two Hydro Pumps and Where the Heater Sits

The drawing shows two hydro pumps, printed as the Seat Jets Hydro Pump and the Foot Jets Hydro Pump. Each is fed by its own dial and switched separately, which is what makes the foot massage independent: you can fill only to the foot well and run the foot jets alone, or run the seat jets, foot jets, and air massage together. The In-Line Water Heater is drawn in the foot hydro loop, on the line that runs from the foot pump's "Out" to "To Hydro Jets" and on to the foot Hydro Jets. It maintains the temperature of water already in the tub while that pump circulates; it is not a heater for incoming water. Read independent foot massage explained for more on the two-pump design. On two-seat models, this separation also explains why one set of jets can run while another does not; two-seat tub, one side not working walks through that situation.

Electrical Printed on the Diagram

Component branches are marked "Electrical 110V", and the footer carries the disclaimer "Please View Specifications for Electrical Amperage (A), Voltage (V) and Wattage (W)." Give your electrician this schematic for circuit count and GFCI protection, and your model's spec sheet for each pump's amperage; electrical requirements by model collects that information in one place.

A Second File Name for the Same Diagram

Ella's schematics folder also serves a file named air-hydro-hydro-digital-heat.pdf. Despite the "heat" in the name, that file prints the same 10-16-23 Air + Hydro Therapeutic Massage + Hydro Foot Component Diagram With Digital Controller described on this page, with the same eight-model list, the same seven components, and the same two-outlet electrical block. It does not add surface heater pads or a heat keypad. If you were sent either file name, you are looking at the same drawing. Should your tub also have the Heated Seat and Backrest option, ask your Ella dealer or the team at ellasbubbles.com/support or (800) 480-6850 for the diagram that matches your full configuration.

Download the official document: Air + Hydro Therapeutic Massage + Hydro Foot Component Diagram With Digital Controller

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