Description
Give your pool heat pump the circulation time it needs while keeping chlorination on its own schedule. This heat demand interface lets a compatible Madimack heat pump start the existing circulation pump outside the chlorinator's programmed hours.
More flexibility from one pool pump
- Extend the heating window: allow circulation for heating after the normal chlorinator timer finishes.
- Keep chlorination separate: extra heating time does not require extending chlorine production.
- Share one circulation pump: support heating and filtration without adding a separate pump solely for heat demand control.
- Automatic operation: the connected heat pump requests circulation through its control output.
- See what is running: indicator lights identify power, chlorinator demand and heat pump demand.
How it works
The controller receives requests from the chlorinator and the heat pump. It supplies the circulation pump when either calls for it, allowing each system to follow its own schedule. Heat demand behaviour and timer settings depend on the connected heater.
Compatibility and installation
Designed for compatible Madimack heat pumps using one shared circulation pump. The installation manual specifies a maximum pump rating of 1.5HP (8A). Check the pump's rating plate and the heater's control connection before purchase.
The heat pump connection and commissioning must follow the manuals for both units. Mount upright in a sheltered position. Only the circulation pump supplying the heat pump connects to the MJ Box outlet.
Product details
| Product type | Single pump heat demand interface controller |
|---|---|
| Manufacturer code | MJBOX400 |
| Supply connection | 240V mains; 10A plug version |
| Maximum connected pump | 1.5HP (8A), per installation manual |
| Control connection | Low-voltage heat pump control cable |
| Status indicators | Power, chlorinator and heat pump |
Common questions
Does the MJ Box change pump speed?
No. It switches circulation in response to demand; it does not convert a single-speed pump to variable speed.
Does it add Wi-Fi to my heater?
No. Any app control or heating schedule comes from the compatible heat pump and its controls.
Will I still need enough water flow?
Yes. The circulation pump and plumbing must meet the heater's flow requirements.
Need help matching your equipment? Email your heat pump, chlorinator and circulation pump models to help@partsforpools.com.au.