DAB ESYBOX MINI 3 – automatic domestic booster pump with variable speed drive

Product detailed description

The DAB ESYBOX MINI 3 is a compact automatic domestic water system – an electronic pressure booster set designed to supply a family home with water. One common housing contains everything a booster set needs: a self-priming multistage centrifugal pump with three impellers, electronics with a frequency converter (inverter), pressure, flow and temperature sensors, a built-in 1 l expansion vessel, a non-return valve and a high-resolution 128 × 240 px LCD display with control buttons.

The unit is intended for owners of houses and holiday cottages who want stable, fluctuation-free water pressure in the bathroom, the kitchen and the garden. It can boost weak mains pressure, draw water from a well with a suction lift of up to 8 m, supply garden irrigation and reuse rainwater from a storage tank. With dimensions of 445 × 262 × 242 mm it fits into small spaces, for example under a sink or into a narrow recess in a utility room.

Its key advantage is the frequency inverter, which smoothly adjusts the pump speed to the current demand. This keeps the pressure constant at all outlets even when someone is showering, the washing machine is filling and the garden is being watered at the same time. The pump draws only as much energy as it actually needs. The motor is water-cooled, so it runs more quietly than air-cooled pumps and can even be installed in an unventilated space. No additional components are required for installation – a large pressure tank, pressure switch or pressure gauge is not needed.

The delivery includes the ESYBOX MINI 3 unit, with the pump, inverter, vessel and display combined in one housing, and the installation and operating instructions. Accessories such as a wall bracket, a storage tank or kits for outdoor installation can be purchased separately depending on where and how you want to use the unit. If you are still choosing, you will find an overview of other models in the category domestic booster pumps with frequency inverter.

How the frequency inverter and constant pressure work

A conventional domestic booster set works in on/off mode: the pressure switch starts the pump when the pressure drops, the pump runs at full power until the pressure reaches the upper limit, and then it switches off. When water is being drawn, the pressure therefore fluctuates between two values, which you notice, for example, as alternating warmer and colder water in the shower or as an uneven flow when watering.

The ESYBOX MINI 3 works differently. The electronics continuously evaluate data from the pressure and flow sensors, and the frequency inverter smoothly increases or reduces the motor speed accordingly. When you open one tap, the pump runs slowly; when a shower and a garden hose are added, the speed rises by exactly as much as needed to keep the pressure at the outlets the same. The result is constant pressure throughout the house, without surges or fluctuations.

This type of control also saves energy. While a conventional booster set always runs at full power, an inverter-driven pump draws only as much energy as the current demand requires. In normal household use, where water is mostly drawn in smaller quantities, the difference is noticeable. You can set the required pressure (setpoint) between 1 and 5 bar; the factory setting is 2.7 bar, and the pump restarts when the pressure drops by 0.3 bar.

Typical applications in a family home

Boosting mains water pressure. If your house is at the end of the water supply network, on higher ground, or has weak pressure in the attic, the unit raises and evens out the pressure for the whole household. When connecting to the public water mains, local regulations must be observed.

Pumping from a well. The self-priming pump draws water from a depth of up to 8 m, with priming taking up to 5 minutes. This is a suitable solution for houses and cottages with a well where the water level is relatively shallow. We recommend fitting a filter on the suction side to trap impurities – bear in mind, however, that a filter slightly reduces hydraulic performance.

Garden irrigation. With a maximum flow rate of 80 l/min (4.8 m³/h) and a maximum head of 55 m, the unit supplies sprinklers as well as garden hoses. Constant pressure is especially welcome with irrigation systems, which work best at a steady pressure.

Rainwater harvesting. In combination with a storage tank (for example the DAB E.SYTANK plastic tank with a capacity of 300 or 500 l, sold separately), you can use collected rainwater for watering or other non-potable purposes. Our article How to choose a domestic booster pump will also help you select the right type of unit.

Protection and safety

The electronics not only control the pressure but also protect the pump and the entire pipework against common operating problems. The ESYBOX MINI 3 offers the following protections:

• Dry-running protection – when the well or tank runs out of water, the pump stops and is not damaged.
• Frost protection (antifreeze) – at temperatures close to freezing, the pump turns over by itself so that the water inside does not freeze.
• Anticycling – prevents the pump from switching on and off constantly due to a small leak in the system, such as a dripping tap or a running toilet cistern.
• Amperometric motor protection – monitors the motor current draw.
• Overheating protection – protects both the electronics and the motor.
• Protection against abnormal supply voltage – responds to fluctuations in the power grid.
• Password lock for settings – prevents unwanted changes to parameters.

The motor has IPX4 protection and insulation class F. The unit is certified for drinking water, so you can safely use it to supply your household with potable water.

Mounting and installation

Installation is simpler than with a conventional booster set because no additional components are needed – no large pressure tank, no pressure switch and no pressure gauge. Everything essential is already inside the unit.

Position. The unit can be installed horizontally or vertically, as it has dual suction and delivery connections. The connections have a G 1" thread and are marked IN (inlet) and OUT (outlet). In the horizontal position, the second port serves as the filling opening. Anti-vibration feet limit the transmission of vibrations to the floor. If you want to mount the unit on a wall, use the E.SYWALL wall bracket, which is sold separately.

Suction. The manual recommends a suction pipe with a diameter of no less than 1". When drawing from a well, fit a filter on the suction side – it traps impurities that could damage the pump, although it slightly reduces hydraulic performance. The maximum suction lift is 8 m and priming takes up to 5 minutes. The pumped water must be clean, free of solid and abrasive particles, with a temperature of 0 to +35 °C for domestic use (0 to +40 °C for other uses).

Pressure setting and vessel pre-charge. Once connected, set the required pressure in the range of 1 to 5 bar. The built-in 1 l expansion vessel is factory pre-charged with air to 2.0 bar. If you change the set pressure significantly, adjust the vessel pre-charge according to the formula given in the manual: Pair = SP – RP – 0.7 bar, where SP is the set pressure (setpoint) and RP is the pressure drop at which the pump restarts (factory setting 0.3 bar). A correct vessel pre-charge supports smooth operation and reduces the number of unnecessary pump starts.

Electrical connection. The unit is powered by single-phase 1~ 230 V AC, 50/60 Hz; the maximum power input is 850 W. Install the unit in a location with an ambient temperature of no more than +50 °C.

Controls, display and app

On the front of the unit there is a high-resolution 128 × 240 px LCD display with control buttons. Here you set the required pressure and monitor the current status of the unit and any protection alerts. Settings can be locked with a password so that nobody changes them by mistake.

The unit has a built-in wireless module ready for D.Connect (DConnect ready). This lets you monitor and control it remotely via the DAB app (H2D / DAB Live!) straight from your phone – particularly handy when the unit sits in a basement, a utility room or a holiday cottage you do not visit every day.

Accessories

Genuine DAB accessories are available for the ESYBOX MINI 3. They are not included in the package – each item is sold separately:

• E.SYWALL – wall bracket for mounting the unit on a wall; sold separately.
• E.SYTANK – DAB plastic water storage tank with a capacity of 300 or 500 l, for example for rainwater; sold separately.
• E.SYCOVER and E.SYCOOL outdoor kits – for installing the unit outside a building; sold separately.

Comparison with a conventional booster set with pressure tank

A conventional domestic booster set consists of a pump, a pressure tank, a pressure switch and a pressure gauge. The pump is switched on and off by the pressure switch and always runs at full power. The pressure in the pipework therefore fluctuates between the cut-in and cut-out values, the assembly takes up more space and the pump is usually louder when running.

The ESYBOX MINI 3 is a compact all-in-one unit in which the frequency inverter smoothly adapts the pump speed to demand. The pressure at the outlets stays constant, energy consumption matches actual demand and the water-cooled motor runs more quietly. Instead of a large pressure tank, the built-in 1-litre expansion vessel is enough, so the whole unit even fits under a sink. On top of that you get electronic protections (dry running, frost, anticycling, motor protection), a display and app control, which a conventional booster set does not normally offer.

A conventional booster set can still be a sensible choice for simple, occasional use. However, if you want the comfort of steady pressure throughout the house, quieter operation and energy savings, a booster pump with a frequency inverter is more convenient in everyday use.

Frequently asked questions

Do I need to buy a large pressure tank for the ESYBOX MINI 3?

No. The unit has a built-in 1 l expansion vessel, and constant pressure is ensured by the frequency inverter, which smoothly varies the pump speed according to demand. You do not need a large pressure tank, pressure switch or pressure gauge for installation.

Can the unit be used to pump water from a well?

Yes. The pump is self-priming and can lift water from a depth of up to 8 m, with priming taking up to 5 minutes. When drawing from a well, the manual recommends fitting a filter on the suction side and using a suction pipe with a diameter of at least 1". If the water level in the well is deeper than 8 m, a surface pump is not suitable and a submersible solution is required.

What water pressure can I set?

You can set the required pressure (setpoint) between 1 and 5 bar. The factory setting is 2.7 bar, and the pump restarts when the pressure drops by 0.3 bar. The maximum operating pressure of the unit is 7.5 bar.

Can the unit be installed in a garage or an unheated utility room?

The unit has frost protection – at temperatures close to freezing, the pump turns over by itself so that the water inside does not freeze. The maximum ambient temperature is +50 °C. For installation completely outside a building, the E.SYCOVER and E.SYCOOL outdoor kits are available and sold separately.

Is the unit noisy?

The motor is cooled by water rather than air, so it needs no fan and runs more quietly. The unit also has anti-vibration feet. This means it can be placed even in unventilated recesses or under a kitchen sink.

What happens when the well or tank runs out of water?

The electronics include dry-running protection. When the pump stops drawing water, the unit shuts it down to prevent damage. In addition, the motor is protected by amperometric protection, overheating protection and protection against abnormal supply voltage.

Can I control the unit from my phone?

Yes. The unit has a built-in wireless module ready for D.Connect (DConnect ready), so you can monitor and adjust it remotely via the DAB app (H2D / DAB Live!). Basic settings can also be made directly on the LCD display using the buttons.

Can the ESYBOX MINI 3 be mounted on a wall?

Yes, with the optional E.SYWALL wall bracket, which is sold separately. Without the bracket, the unit is installed on the floor, either horizontally or vertically thanks to its dual suction and delivery connections.

Is the unit suitable for drinking water?

Yes, the ESYBOX MINI 3 is certified for drinking water (declaration of conformity for potable water). When connecting to the public water mains, local regulations must be observed.

What kind of water can the unit pump?

Clean water free of solid and abrasive particles, non-viscous, non-aggressive, non-crystallising and chemically neutral. The water temperature can be 0 to +35 °C for domestic use and 0 to +40 °C for other uses.

What is included in the package?

The package contains the ESYBOX MINI 3 unit itself – pump, frequency inverter, expansion vessel and display in one housing – and the manual. The E.SYWALL wall bracket, the E.SYTANK tank and the outdoor kits are accessories sold separately.

Technical specifications