3-1
18 - IE
INSTALLATORUSERTECHNICIAN
3
BOILER STARTUP.
INITIAL CHECK
To commission the boiler:
- ensure that the declaration of conformity of
installation is supplied with the appliance;
- ensure that the type of gas used corresponds to
boiler settings;
- check connection to a 230V-50Hz power
mains, correct L-N polarity and the earthing
connection;
- make sure the heating system is lled with wa-
ter and that the manometer indicates a pressure
of 1÷1.2 bar;
- make sure the air valve cap is open and that the
system is well deaerated;
- switch the boiler on and ensure correct ignition;
- make sure the gas maximum, medium and
minimum flow rate and pressure values
correspond to those given in the handbook
(Paragraph 3.17);
- check activation of the safety device in the event
of no gas, as well as the relative activation time;
- check activation of the main switch located
upstream from the boiler;
- check that the intake and/or exhaust terminals
are not blocked;
- check activation of the “no air” safety pressure
switch;
- ensure activation of all adjustment devices;
- seal the gas ow rate regulation devices (if
settings are modied);
- ensure production of domestic hot water;
- ensure sealing eciency of water circuits;
- check ventilation and/or aeration of the instal-
lation room where provided.
If any checks/inspection relative to safety give
negative results, do not start the system.
3.1 HYDRAULIC LAYOUT.
Key:
1 - Domestic hot water probe
2 - Domestic hot water ow switch
3 - Gas valve
4 - Flow limiter
5 - System draining valve
6 - Burner
7 - Rapid heat exchanger
8 - Fan
9 - Sealed chamber
10 - Fumes pressure switch
11 - Fumes hood
12 - System expansion vessel
13 - Delivery probe
14 - Safety thermostat
15 - Air vent valve
16 - Boiler circulating pump
17 - System pressure switch;
18 - By-pass
19 - 3 bar safety valve
20 - System lling valve
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic hot water inlet
R - System return
M - System delivery
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