23
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
If the power cable is damaged, contact a qualied company (e.g. the Authorised Technical As-
sistance Centre) for its replacement to avoid a hazard.
If the network fuse indicated in the wiring diagram (Fig. 53) as component "F2" on the P.C.B. needs to be changed, this operation must
also be performed by qualied personnel using a 3.15A rapid type (F) 250VAC fuse (dimension 5 x 20).
For the main power supply to the appliance, never use adapters, multiple sockets or extension leads.
For the electrical connection between the appliance and a possible storage tank unit, connect the DHW probe (optional) to the
relative terminals 47 and 48, eliminating the R8 resistance on the appliance (Fig. 53):
Installation with system operating at direct low temperature.
e boiler can directly supply a low temperature system by setting the ow 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. 53).
e thermostat must be positioned on the system ow pipe at a distance of at least 2 metres from the boiler.
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