Hot water boiler SCHAERER Spare Parts 3370072629

A hot water boiler maintains a small reservoir of water at a set temperature, ready to dispense instantly through a coffee machine's hot water tap or steam wand. An electric heating element immersed in the water raises its temperature to near-boiling, while a thermostat cycles the element on and off to hold the target level without overheating. Because the water is held in a sealed vessel, pressure builds slightly, allowing it to flow out under its own force when the tap is opened, without the need for a pump.

The operator fills the boiler through an inlet connection, then switches the unit on. Once the water reaches the set temperature, the thermostat keeps it there until the machine calls for hot water. When the tap is opened, the pressure inside the boiler pushes the water out through the outlet pipe; as the level drops, fresh water enters from the supply line, reheating almost immediately. The cycle continues until the machine is switched off or the water supply is interrupted.

This SCHAERER spare part is constructed as a compact, sealed pressure vessel with an internal heating element and thermostatic control. The connections for inlet and outlet are standardised to fit SCHAERER coffee equipment, allowing direct replacement without modification.

The 230 V AC rating means the boiler connects to a standard UK single-phase circuit, the same as most kitchen appliances, so no special wiring is required. The 2 kW power draw indicates a moderate load on the circuit, comparable to a commercial toaster or small urn, and should be factored into the kitchen's total electrical demand. The 0.32 litre capacity shows the volume of water held at any one time, sufficient for several hot drinks in quick succession before the reservoir refills and reheats.

Cleaning involves periodic descaling of the internal surfaces to remove limescale build-up from hard water. The sealed construction means the boiler must be removed from the machine for thorough cleaning, following the manufacturer's descaling programme to avoid damaging the heating element or thermostat.

This boiler is a direct replacement part for SCHAERER coffee machines, ensuring compatibility with the original equipment's water flow and temperature settings.