3-1
28
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
3
BOILER COMMISSIONING
(INITIAL CHECK)
To commission the boiler:
- make sure 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 central heating system is filled
with water and that the pressure gauge indicates
a pressure of 1-1.2 bar.
- check that the the air vent valve cap is open and
that the system is well deaerated;
- switch the boiler on and check correct ignition;
- check the ∆p gas values in domestic hot water
and central heating modes;
- check the CO
2
in the fumes 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 the intervention of the main switch
located upstream of 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 set-
tings are modified);
- check the production of domestic hot water;
- check sealing efficiency of water circuits;
- check ventilation and/or aeration of the instal-
lation room where provided.
If even only a single safety check offers a negative
result, do not commission the system.
3.1 PLUMBING DIAGRAM.
Key
1 - Stainless steel coil for storage tank
2 - System draining valve
3 - Storage tank unit return one-way valve
4 - Polyphosphate dispenser (optional)
5 - System filling valve
6 - 3 bar safety valve
7 - Manifold draining valve
8 - Condensate drain trap
9 - Gas valve
10 - Gas valve outlet pressure point (P3)
11 - Air intake pipe
12 - Fan
13 - Gas nozzle
14 - Detection electrode
15 - Burner
16 - Condensation module covers
17 - Condensation module
18 - Manual air vent valve
19 - Fumes hood
20 - Flue gas probe
21 - Air sample point
22 - Flue sample point
23 - Gas ΔP pressure point
24 - Flow probe
25 - Safety thermostat
26 - Ignition electrode
27 - Boiler Circulator
28 - System pressure switch (absolute)
29 - Three-way valve (motorised)
30 - Venturi positive sign P1
31 - Venturi negative sign P2
32 - Air/gas Venturi manifold
33 - System expansion vessel
34 - Vent valve
35 - Hydraulic manifold
36 - Zone 1 pump
37 - Zone 1 one-way valve
38 - D.H.W. expansion vessel
39 - Cold water inlet cock
40 - Cold water filter
41 - Flow limiter
42 - Cold water inlet non-return valve
43 - 8 bar safety valve
44 - DHW recirculation pump (optional)
45 - Domestic hot water probe
46 - Magnesium anode
47 - Storage tank unit draining valve
RA1 - Zone 1 system return (High tempera-
ture)
MA1 - Zone 1 system flow (High temperature)
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic cold water inlet
RC - Domestic hot water recirculation
RP - Return from solar panels
MP - Flow from solar panels
