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Water connections
6. Water connections
The unit has supply and return connections for connection to a water distribution system. Connection to the
system must be carried out by authorised technicians and must comply with current laws and regulations.
BT
Fig. 31
6.1 Preliminary check
6.1.1 Water circuit
Before installing the unit, do a preliminary check and ensure the following:
• the water circuit inside the unit uses copper piping: do not use galvanised components in the system, as
they may be subject to excessive corrosion;
• the maximum water pressure must be ≤ 3 bar;
• the maximum water temperature must be ≤ 75°C;
• use system components that are compatible with the system water and the materials making up the unit;
• the pipes and system components to be installed must be suitable to withstand the pressure and
temperature of the system water;
• shut-o valves must be installed at the lowest points of the system so that the circuit can be completely
drained during maintenance;
• air vents must be installed at the highest points of the system, in places easily accessible to the Service
technician. Inside the unit there is an automatic air vent for the water circuit: check that this is not over-
tightened when charging the system, so that it can work eectively;
• the unit should only be connected to closed water circuits; connection to an open circuit can lead to
corrosion of the water pipes.
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