32
3-1
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
A
N
19 - Condensation module covers
20 - Condensation module
21 - Manual air vent valve
22 - Fumes hood
23 - Flue probe
24 - Air sample point
25 - Flue sample point
26 - Gas ΔP pressure point
27 - Flow probe
28 - Safety thermostat
29 - Ignition electrode
30 - Boiler Circulator
31 - System pressure switch (abso-
lute)
32 - Three-way valve (motorised)
33 - Venturi positive sign P1
34 - Venturi negative signal P2
35 - Air/gas Venturi manifold
36 - System expansion vessel
37 - Vent valve
38 - Hydraulic manifold
39 - Zone 1 pump
40 - Zone 1 one-way valve
41 - Mixing valve filter
42 - DHW mixing valve
43 - Cold water inlet cock
44 - Cold water filter
45 - Flow limiter
46 - Cold water inlet non-return
valve
47 - 8 bar safety valve
48 - DHW recirculation pump (op-
tional)
49 - Solar expansion vessel
50 - Manual air vent valve
51 - Shut-off valve with thermometer
52 - Safety valve with manometer
53 - One-way valve (OV 20)
54 - Solar pump
55 - Flow meter
56 - Solar stainless steel coil
57 - One-way valve (OV 15)
RA1 - Zone 1 system return (High
temperature)
MA1 - Zone 1 system flow (High tem-
perature)
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
SC - Condensate drain
Key
1 - Storage tank unit draining valve
2 - Magnesium anode
3 - D.H.W. expansion vessel
4 - Domestic hot water probe
5 - Stainless steel coil for storage tank
6 - System draining valve
7 - Polyphosphate dispenser (optional)
8 - System filling valve
9 - 3 bar safety valve
10 - Manifold draining valve
11 - Condensate drain trap
12 - Gas valve
13 - Gas valve outlet pressure point (P3)
14 - Air intake pipe
15 - Fan
16 - Gas nozzle
17 - Detection electrode
18 - Burner
3
BOILER COMMISSIONING
(INITIAL CHECK)
To commission the boiler:
- make sure that the declaration of conformity
for installation is supplied with the appliance;
- 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 HYDRAULIC DIAGRAM.
