28
3-1
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
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;
- switch the boiler on and check correct ignition;
- check the CO
2
in the fumes at maximum and
minimum flow rate;
- make sure the fan rpm matches the value pro-
vided in the book (Par. 3.18);
- 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 the existing draught during normal
functioning of the appliance, e.g. a draught
gauge positioned at the exit of the appliance
combustion products;
- check that there is no backflow of combustion
products into the room, even during function-
ing of fans;
- 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 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.
Key:
1 - Draining funnel on view
2 - 4 bar safety valve
3 - Boiler draining valve
4 - System pressure switch
5 - Flow manifold
6 - Gas valve
7 - Air fan
8 - Gas nozzle
9 - Air intake pipe
10 - Detection electrode
11 - Condensation module cover
12 - Condensation module
13 - Fumes hood
14 - Air sample point
15 - Flue sample point
16 - Condensing module air vent valve
17 - System flow regulation probe
18 - Air pressure switch
19 - System return regulation probe
20 - Over temperature safety thermostat
21 - Heat-exchanger safety thermostat
(manual reset)
22 - Flue probe
23 - Burner
24 - Thermofuse
25 - Ignition electrode
26 - Manifold cover
27 - Sleeve with seats for Venturi
28 - Boiler circulator pump
29 - Condensate trap siphon
M - System flow
SC - Condensate drain
G - Gas supply
R - System return
