Immergas NIKE MYTHOS 24 2 E, Instruction And Warning Book

Page: 13 / 24

13
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;
- make sure the central heating system is filled
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 flow rate and pressure values
correspond to those given in the handbook
par. 3.16;
- 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 of 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
functioning of fans;
3.1 HYDRAULIC DIAGRAM.
Fig. 3-1
- ensure activation of all adjustment devices;
- seal the gas flow rate regulation devices (if
settings are modified);
- check the production of domestic hot water;
- check sealing efficiency of water circuits;
- check ventilation and/or aeration of the
installation room where required.
If even only a single safety check offers a negative
result, do not commission the system.
Key:
1 - Domestic hot water flow switch
2 - System filling valve
3 - Flow limiter
4 - Gas valve
5 - System expansion vessel
6 - Burner
7 - Primary heat exchanger
8 - Fumes hood
9 - Flue safety thermostat
10 - Safety thermostat
11 - Delivery probe
12 - Vent valve
13 - Boiler circulator pump
14 - System draining valve
15 - System pressure switch
16 - DHW heat exchanger
17 - Three-way valve (motorised)
18 - By-pass
19 - 3 bar safety valve
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic cold water inlet
R - System return
M - System flow