Fig. 3-1
3
BOILER
START-UP (INITIAL CHECK)
To commission the boiler:
- ensure that the declaration of conformity of
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 igni-
tion;
- check the CO
2
in the fumes at maximum and
minimum flow rate;
- check that the n° of fans revs is that indicated
in the book (Par. 3-21);
- 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 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 functio-
ning 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 any checks/inspection give negative results, do
not start the boiler.
3.1 HYDRAULIC DIAGRAM.
Key:
1 - Draining funnel on view
2 - 4 bar safety valve
3 - Boiler draining valve
4 - Absolute pressure switch
5 - Gas valve
6 - Air fan
7 - Gas nozzle
8 - Air intake pipe
9 - Ignition electrode
10 - Condensation module cover
11 - Condensation module
12 - Fumes hood
13 - Air sample point
14 - Flue sample point
15 - Automatic vent valve
16 - System flow regulation probe
17 - System return regulation probe
18 - Overheating safety thermostat
19 - Flue safety thermostat
20 - Burner
21 - Detection electrode
22 - Air/gas Venturi manifold
23 - Venturi positive sign (P2)
24 - Boiler pump
25 - Condensate trap siphon
M - System flow
SC - Condensate drain
G - Gas supply
R - System return
133
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