Immergas MINI NIKE 3 E - Page 154

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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;
- make sure the central heating system is lled
with water and that the manometer indicates
a pressure of 1÷1.2 bar.
- switch the boiler on and check correct ignition;
- make sure the gas maximum, intermediate
and minimum ow rate and pressure values
correspond to those given in the handbook,
Par. 3.18;
- 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;
- 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 backow of combustion
products into the room, even during function-
ing of fans;
- ensure activation of all adjustment devices;
- seal the gas ow rate regulation devices (if set-
tings are modied);
- check the production of domestic hot water;
- check sealing eciency of water circuits;
3.1 HYDRAULIC DIAGRAM.
Fig. 3-1
- check ventilation and/or aeration of the instal-
lation room where provided.
If any checks/inspection give negative results, do
not start the boiler.
Key:
1 - Domestic hot water ow switch
2 - System lling valve
3 - Flow limiter
4 - Domestic hot water probe
5 - Gas valve
6 - System expansion vessel
7 - Burner
8 - Primary heat exchanger
9 - Flue hood
10 - Flue safety thermostat
11 - Safety thermostat
12 - Delivery probe
13 - Vent valve
14 - Boiler pump
15 - System draining valve
16 - System pressure switch
17 - DHW. heat exchanger
18 - ree-way valve (motorised)
19 - By-pass
20 - 3 bar safety valve
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic cold water inlet
R - System return
M - System ow