Electric water heater Milano, 40L, bottom connection

Product detailed description

Electric water heaters are essential components in residential and small commercial plumbing systems, particularly in spaces where compact design and vertical installation are required. The Hydroland Milano series is commonly installed in utility rooms, service corridors, and semi-enclosed areas where space is limited. These units provide on-demand hot water supply for single-point applications such as basins, showers, and small kitchens. Installers typically integrate these units into cold water lines with direct electrical supply, ensuring proper insulation and thermal management to maintain efficiency and safety.

The OW.MIL.D40 model is designed for vertical mounting with bottom connections, allowing for straightforward installation in confined spaces. It is suitable for use in low-pressure systems and can be integrated into existing plumbing layouts with minimal adjustments. The compact dimensions and lightweight design make it ideal for retrofitting and new builds where wall mounting is preferred. The stainless steel heating element and anodised magnesium anode contribute to long-term durability and corrosion resistance in hard water environments.

Technical parameters

Brand	Hydroland
Series	Milano
Model code	OW.MIL.D40
Capacity	40 l
Connection type	Bottom
Dimensions	34 x 34 x 75 cm
Net weight	13.2 kg
Power	2000 W, 230V-50Hz
Energy class	B
Protection rating	IPX4
Maximum operating pressure	6 bar
Magnesium anode	ø20 x 200 mm
EAN	5903887100915
Code	OW.MIL.D40
Brand	Hydroland

The technical parameters listed define the operational limits and system requirements for correct sizing and selection. A nominal capacity of 40 litres ensures sufficient storage for moderate usage patterns. The maximum working pressure of 6 bar means the unit is compatible with standard household and low-pressure commercial systems. The IPX4 protection rating confirms suitability for environments with occasional splashing but not for fully wet areas. The 2000W power consumption indicates the rate at which the unit heats water and should be considered when assessing electrical load requirements.

Installation and connection

The Hydroland Milano OW.MIL.D40 requires vertical installation with a bottom inlet and outlet. The connection ports are threaded for standard plumbing fittings. Installers should ensure that the unit is mounted securely on a stable surface or wall bracket to prevent movement during operation. The inlet and outlet ports are sized to accommodate standard pipe diameters and must be connected to a cold water supply line with a dedicated circuit breaker. A pressure relief valve must be fitted upstream to manage excess pressure and prevent damage to the internal tank.

Before energising the unit, the installer must verify that the tank is fully filled with water to prevent dry running. The power cable is 150 cm in length and terminates in a European-style plug, requiring a compatible socket. The thermostat allows manual temperature adjustment between 25°C and 75°C, with an automatic cut-off at 93°C to prevent overheating. The installation should include a protective earth connection and a dedicated fuse rated for the unit’s power draw. Common mistakes include incorrect orientation, failure to secure the unit, and neglecting to fit a pressure relief valve.

Compatibility and accessories

The OW.MIL.D40 is compatible with standard plumbing systems using copper or plastic piping. It is designed for integration into low-pressure systems and does not require additional pumps unless the supply pressure is below 0.6 MPa. The unit is suitable for use with thermostatic mixing valves to regulate output temperature. Accessories such as mounting brackets, pressure relief valves, and electrical junction boxes may need to be ordered separately. The magnesium anode must be replaced periodically to maintain internal tank integrity and prolong the unit’s lifespan.

Technical background for designers

The Hydroland Milano OW.MIL.D40 operates by converting electrical energy into heat via a stainless steel heating element. The internal tank is constructed from cold-rolled steel with a minimum wall thickness of 1.8 mm, providing structural strength and thermal retention. The tank is coated with a vitreous enamel layer of at least 0.35 mm thickness, which prevents corrosion and ensures a smooth interior surface. The insulation layer consists of polyurethane foam with a thickness of 20 mm, reducing heat loss and improving energy efficiency. The unit integrates into the system through a bottom inlet and outlet, allowing for compact installation in confined spaces. The anodised magnesium rod neutralises acidic water and prevents scale buildup, extending the tank’s service life.

Designers should consider the unit’s maximum operating pressure and ensure that the system includes a pressure-limiting device. The electrical load of 2000W must be accommodated within the building’s electrical distribution plan. The IPX4 rating allows for installation in areas with limited exposure to water but not in fully enclosed wet zones. The unit’s thermal efficiency is influenced by ambient temperature and insulation quality, making it suitable for indoor installations with stable environmental conditions.

Service and operation

Regular maintenance is essential to ensure the long-term performance of the Hydroland Milano OW.MIL.D40. The magnesium anode should be inspected and replaced according to the manufacturer’s recommendations to prevent internal corrosion. The pressure relief valve must be tested weekly by manually releasing a small amount of water to confirm proper function. In the event of a leak or malfunction, the unit must be immediately disconnected from the power supply to prevent further damage. The thermostat and indicator lights provide visual feedback on the heating status, allowing users to monitor operation.

During periods of non-use, the unit should be disconnected from the power supply to reduce energy consumption and prevent unnecessary wear. The tank should remain filled with water at all times to avoid dry running and potential damage to the heating element. If the unit is installed in a high-humidity environment, periodic inspection of the housing and electrical connections is recommended to prevent condensation-related issues. The unit’s service life is influenced by water hardness, electrical supply stability, and regular maintenance practices.

Frequently asked questions

Can the Hydroland Milano OW.MIL.D40 be installed in a wet room?
No, the IPX4 rating means it is suitable for areas with occasional splashing but not fully enclosed wet spaces such as bathrooms or showers.

Is the unit compatible with a thermostatic mixing valve?
Yes, the output temperature can be regulated using a thermostatic mixing valve to prevent scalding and ensure safe operation.

What should be done if the pressure relief valve leaks?
If the pressure relief valve leaks, the unit should be turned off and inspected for blockages or damage. The valve must be replaced if it fails to close properly.

How often should the magnesium anode be replaced?
The anode should be inspected and replaced according to the manufacturer’s guidelines, typically every few years depending on water quality and usage patterns.

Documents for download

• Electric water heaters (PDF)