28
3-1
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
3
BOILER COMMISSIONING
(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 filled with
water and that the manometer indicates a
pressure of 1÷1.2 bar;
- switch the boiler on and ensure correct ignition;
- check the ∆p gas values in DHW mode (
when
the boiler is connected to an external storage tank
unit)
and in central heating mode;
- check the CO
2
in the combustion products at
maximum and minimum flow rate;
- 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 and in the boiler;
- check that the intake and/or exhaust terminals
are not blocked;
- ensure activation of all adjustment devices;
- seal the gas flow rate regulation devices (if
settings are modified);
- check the production of DHW
(when the boiler
is connected to an external storage tank unit
);
- ensure sealing efficiency of water circuits;
- check ventilation and/or aeration of the
installation room where provided.
If even only a single safety check offers a negative
result, do not commission the system.
3.1 HYDRAULIC DIAGRAM.
Key:
1 - Condensate drain trap
2 - System filling valve
3 - Gas valve
4 - Gas valve outlet pressure point (P3)
5 - Venturi positive sign (P2)
6 - Venturi negative sign (P2)
7 - Air/gas Venturi manifold
8 - Fan
9 - Gas nozzle
10 - Detection electrode
11 - Air intake pipe
12 - Condensation module
13 - Manual air vent valve
14 - Flue probe
15 - Air sample point
16 - Δp gas pressure point
17 - Flue sample point
18 - Heat exchanger safety thermal fuse
19 - Fumes hood
20 - Delivery probe
21 - Safety thermostat
22 - Ignition electrodes
23 - Burner
24 - Condensation module cover
25 - Return probe
26 - System expansion vessel
27 - Vent valve
28 - Boiler pump
29 - System draining valve
30 - System pressure switch
31 - 3-way valve (motorised) (Optional)
32 - Adjustable by-pass
33 - 3 bar safety valve
G - Gas supply
SC - Condensate drain
(minimum internal diameter Ø 13 mm)
RU - Storage tank unit return (Optional)
MU - Storage tank unit flow (Optional)
RR - System Filling
R - System return
M - -System flow
