Electric water heater Milano, 50L, bottom connection

Product detailed description

Vertical electric water heaters with bottom connections are commonly used in residential and small commercial buildings where space is limited and wall mounting is not feasible. These units are frequently integrated into central hot water systems, providing on-demand heating for kitchens, bathrooms, and utility areas. Installers must consider insulation, electrical supply, and water pressure when positioning these units. The Hydroland Milano OW.MIL.D50 is engineered for compact spaces and offers a 50L capacity for moderate demand applications.

This model is particularly suited for installation in mechanical rooms, basements, or behind kitchen cupboards. Its vertical orientation allows for efficient stacking or side-by-side placement with other units. The bottom connection simplifies integration with existing pipework, especially in retrofit projects where overhead space is constrained. The unit’s dimensions and weight must be considered during planning to ensure structural support and accessibility for maintenance.

Technical parameters

Brand	Hydroland
Series	Milano
Index	OW.MIL.D50
Capacity	50 L
Connection type	Bottom
Dimensions	34 x 34 x 78.6 cm
Net weight	14.1 kg
Power	2000 W, 230V-50Hz
Energy class	B
Protection class	IPX4
Maximum working pressure	6 bar
Magnesium anode	ø20 x 200 mm
EAN	5903887104722
Code	OW.MIL.D50
Brand	Hydroland

The 50L tank size is appropriate for households with up to four users or small businesses requiring intermittent hot water. The 2000W heating element ensures rapid recovery times, while the IPX4 rating permits installation in locations exposed to splashing water, such as utility rooms or behind splashbacks. The maximum working pressure of 6 bar means the unit can be used in standard domestic water supply systems without additional pressure regulation. The magnesium anode helps reduce internal corrosion, extending the service life of the tank.

Installation and connection

Installation requires a vertical orientation with the unit secured using the provided mounting components. The bottom connection includes male threads for 1/2 inch pipe fittings, compatible with standard copper or plastic pipework. A dedicated electrical circuit with a 230V-50Hz supply and a 10A fuse is required. Before energising the unit, verify that the tank is fully filled with water to prevent dry firing. Check the pressure relief valve operation and ensure the drain pipe is correctly routed to a safe discharge point.

Always confirm the unit’s orientation and support before connecting utilities. After installation, perform a leak test and verify the thermostat range (25°C–75°C) using a calibrated thermometer.

Compatibility and accessories

The OW.MIL.D50 is compatible with standard plumbing systems using 1/2 inch threaded connections. It can be integrated with thermostatic mixing valves to provide safe hot water temperatures for sensitive applications. Additional accessories such as expansion vessels may be required in systems with closed-loop water supplies. While no specific related products are listed, similar models in the Hydroland Milano series offer alternative capacities and configurations for larger or smaller loads.

Technical background for designers

The unit operates via a stainless steel SS840 heating element immersed in the cold water supply, controlled by a mechanical thermostat with a 25°C–75°C range. The inner tank is constructed from cold-rolled steel with a minimum 0.35 mm enamel coating to resist corrosion. The 20 mm polyurethane insulation minimises heat loss, while the IPX4-rated casing protects against water ingress during routine use. The tank’s vertical design reduces floor space requirements, making it suitable for compact installations. The unit’s efficiency is influenced by ambient temperature, insulation quality, and the frequency of hot water demand.

The magnesium anode, measuring ø20 x 200 mm, acts as a sacrificial component to protect the tank from internal corrosion. Over time, it depletes and must be replaced to maintain system integrity. The unit’s energy class B indicates moderate efficiency compared to newer models, making it suitable for applications where high performance is not the primary concern. Designers should consider the unit’s maximum working pressure and electrical load when planning the overall system layout.

Service and operation

Regular maintenance includes checking the pressure relief valve weekly to ensure proper operation and inspecting the magnesium anode for signs of depletion. The anode should be replaced according to the manufacturer’s guidelines to prevent internal corrosion. The unit should be drained and flushed periodically to remove sediment buildup, which can affect heat transfer efficiency. If the unit is to remain unused for an extended period, disconnect the power supply to prevent dry firing and reduce the risk of electrical faults.

During operation, monitor the thermal cut-off at 93°C ± 3°C to prevent overheating. The indicator lights provide visual feedback on heating status and power supply. In the event of a leak or unusual operation, immediately disconnect the unit from the power source and inspect for damage. Always follow the manufacturer’s instructions for safe handling and disposal of components during servicing.

Frequently asked questions

Can the OW.MIL.D50 be installed in a location with high humidity?
Yes, the IPX4 rating allows installation in humid environments such as utility rooms or behind splashbacks, provided the unit is not directly exposed to water jets.

Is it necessary to replace the magnesium anode regularly?
Yes, the anode should be inspected and replaced periodically to prevent internal corrosion of the tank. The exact interval depends on water quality and usage patterns.

What should be done if the unit is left unused for a long time?
The unit should be disconnected from the power supply to prevent dry firing and potential damage to the heating element and tank lining.

Can the unit be used with a thermostatic mixing valve?
Yes, the OW.MIL.D50 can be integrated with a thermostatic mixing valve to regulate output temperature and prevent scalding in sensitive applications.

Documents for download

• Electric water heaters (PDF)