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To protect from possible dispersions of DC voltage, it is necessary to provide a type A differen-
tial safety device.
If the power cable is damaged, contact a qualified company (e.g. the Authorised Technical As-
sistance Centre) for its replacement to avoid a hazard.
The power supply cable must be laid as shown (Fig. 7).
If the network fuse on the P.C.B. needs replacing, this must also be done by qualified personnel: use a 5x20 250V 3.15 A fast fuse.
For the main power supply to the appliance, never use adapters, multiple sockets or extension leads.
Installation with system operating at direct low temperature.
The boiler can directly supply a low temperature system by setting the flow temperature adjustment range "t0" and "t1" (Par. 3.13).
In this situation it is good practice to insert a relevant safety kit (optional) made up from a thermostat (with adjustable temperature).
Execute connection to terminal boards 14 and 15, eliminating link X70 (Fig. 58).
The thermostat must be positioned on the system flow pipe at a distance of at least 2 metres from the boiler.
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