12
Instructions for the installer
3.8 - FILLING OF THE SYSTEM
Once all the connections have been made, proceed with the
filling of the system.
3.7 - BASIC INSTALLATION SCHEME
Attention!
The installation has to be performed as shown
in the scheme, by fitting a safety valve, set at a
max pressure of 6 bar, on the sanitary circuit.
It is necessary, besides, to install an expan-
sion vessel on the sanitary circuit, capable to
absorb the increase of the volume of the hea-
ted water.
Hot water
recirculation
Boiler
MC
RC
Cold water
supply
Pressure
reducing valve
Gate valve
Gate valve
Safety valve
set at 6 bar
Domestic hot water
expansion vessel
Attention.
The hydraulic scheme shown in this manual
is only explanatory; for its sizing and the
configuration of the system it is necessary
to consult a trained thermician office.
Discharge of safety valve
Foresee, in correspondence of the safety valve, a drainage
pipe, with funnel and siphon, connected to the sewage. The
discharge has to be visible.
Attention!
If this precaution is not taken, a possible in-
tervention of the safety valve can cause da-
mages to people, animals and things,
towards which the Unical cannot be consi-
dered responsible.
