Installation - Baxi UB 80 INOX Technical Manual

Position the storage unit under the boiler at a distance of 100mm from the wall.
If the floor is uneven, level the appliance using the adjustable feet.
Make the hydraulic connections, depending on the model, according the general diagram in figure 1.
MODELS WITH BUILT-IN THREE-WAY VALVE
Remove the cap from the G3/4" on the coil inlet connector of the boiler.
An optional kit is available (described in the next paragraph) to combine storage units with boilers fitted with three-way
valves (LUNA 3).
BOILERS WITHOUT THREE-WAY VALVES
Install the three-way valve, supplied as an accessory, onto the boiler inlet connector (ECO 3, FOURTECH)
Install a check valve on the DHW cold water inlet in order to drain the storage boiler.
Connect the safety valve to a drain trap.
For special areas, where the water is harder than 25°F (1 °F = 10mg calcium carbonate per litre of water), install a poly-
phosphate dispenser, compliant with current regulations, on the DHW circuit (cold water inlet).
NOTE:
If:
• the pressure of the water supply or lifting system is such as to require the installation of a pressure reducer (pressure
higher than 4 bar);
• a non-return valve is fitted on the water supply line;
• the cold water network is too small to allow the water in the storage boiler to expand;
the DHW circuit safety valve trips and causes the water to leak.
To eliminate this problem, install an expansion vessel on the DHW circuit supplied as an accessory.
INSTRUCTIONS FOR FITTERS

4. INSTALLATION

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