23
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 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.
- make sure the air valve cap is open and that the
system is well deaerated;
- 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);
- make sure the gas supply failure safety device is
working, within its relative intervention time;
- check activation of the main switch located
upstream of the boiler;
- check that the intake and/or exhaust terminals
are not blocked;
- check activation of the “no air” safety pressure
switch;
- 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 required.
3.1 HYDRAULIC DIAGRAM.
If even only a single safety check offers a negative
result, do not commission the system.
Key:
1 - Domestic hot water probe
2 - Domestic hot water flow switch
3 - Flow limiter
4 - System filling valve
5 - Gas valve
6 - System expansion vessel
7 - Burner
8 - Primary heat exchanger
9 - Fan
10 - Sealed Chamber
11 - Flue pressure switch
12 - Flow probe
13 - Vent valve
14 - Boiler circulator pump
15 - System draining fitting
16 - System pressure switch
17 - Safety thermostat
18 - Plate heat exchanger
19 - Three-way valve (motorised)
20 - Adjustable by-pass
21 - 3 bar safety valve
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic cold water inlet
R - System return
M - System flow
Summary of Contents for NIKE MYTHOS 24 2E Series
Page 1: ...EOLO MYTHOS 24 2E IE Instruction and warning book 1 038791ENG ...
Page 2: ......
Page 31: ...31 ...
