ENGLISH
7
6. HYDRAULIC CONNECTION
In order for the boiler to work correctly it must be suitably connected to a heating system. It is reminded that
installation must be carried out by trained personnel or companies according to MD 37/90. The
manufacturer declines any responsibility for installations not carried out correctly or by unqualified
personnel. For installation please refer to UNI7129 and UNI10412 (and any relative updates) Standards.
For a correct installation, verify that the hydraulic system is not leaking, thus jeopardising the functioning of the
generator and its integrity. In this regard, the installing company must adopt the solutions it considers
necessary in order to avoid that the thermal exchange surfaces of the boiler can, in time, suffer
limestone type incrustation, sludge, iron residues from the system and anything else foreign to the
heating water. This will enable optimising the thermal yield and functioning safety of the generator and
of the system. We strongly recommend installing a softener on the cold water inlet for system load and a mesh
filter on the boiler piping to the filter larger impurities.
COMPLETELY BLEED THE HEATING SYSTEM AND THE BOILER AT EVERY FILLING.
CONNECT THE SAFETY VALVE DRAIN AND BRING IT OUTSIDE THE BOILER.
A DIRT SEPARATOR WITH MAGNET MUST BE INSTALLED ON THE RETURN CIRCUIT TO
PROTECT THE BOILER’S INTERNAL COMPONENTS, AS THE ELECTRONIC CIRCULATOR,
FROM IMPURITIES AND FERROUS PARTICLES.
ALTERNATIVELY, WE RECOMMEND YOU TO USE A HEAT EXCHANGER TO SEPARATE THE BOILER’S
WATER FROM THE CIRCUIT’S WATER.
INSTALL AN ANTI-CONDENSATION VALVE, WITH SETTING AT 55°C, AS CLOSE AS POSSIBLE
TO THE BOILER.
If the production of domestic hot water is envisioned, installer a domestic boiler holding at least 80
litres for good boiler functioning.
The boiler is provided with an 8 litres expansion tank that, should it also be insufficient for the system, another
of adequate measure must be installed. Below is the calculation to determine the necessary capacity of the
expansion tank:
Should the existing expansion tank be insufficient
provide an additional tank.
Ve=
Ce (Vi+Vc)
(1- )
Pi
Pf
Ve = volume espansione
Ce = coefficiente espansione
Vi = litri di contenuto acqua impianto
Vc = litri di contenuto acqua caldaia
Pi = pressione di precarica del vaso
Pf = pressione di taraura della valvola di sicurezza
Ve =
volume expansion
Ce =
expansion coefficient
Vi =
liters of water plant
Vc =
liters of water boiler
Pi =
precharge pressure
Pf =
pressure relief valve
TEMPERATURA MAX
COEFF ICIENTE D I
ESPANSIONE
40
0,0076
50
0,0118
60
0,0168
70
0,0224
80
0,0287
90
0,0357
99
0,0432
Max temperature
Expansion
coefficient
