Boiler Commissioning (Initial Check); Plumbing Diagram - Immergas VICTRIX EXA 28 1 ERP Instruction And Recommendation Booklet

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 pressure gauge indicates
a pressure of 1-1.2 bar.
- switch the boiler on and check correct ignition;
- check the ∆p gas values in domestic hot water

3.1 PLUMBING DIAGRAM.

and central heating modes;
- 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 lo-
cated upstream of the boiler and in the boiler;
- 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 set-
tings are modified);
- check the production of domestic hot water;
- check sealing efficiency of water circuits;
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- 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.
Key:
1 - Condensate drain trap
2 - Domestic hot water flow switch
3 - Flow limiter
4 - System filling cock
5 - Domestic hot water probe
6 - Gas valve
7 - Gas valve outlet pressure point (P3)
8 - Venturi positive sign (P2)
9 - Venturi negative sign (P2)
10 - Air/gas Venturi manifold
11 - Fan
12 - Gas nozzle
13 - Detection electrode
14 - Flue probe
15 - Air intake pipe
16 - Condensation module
17 - Manual air vent valve
18 - Heat exchanger safety thermal fuse
19 - Air sample point
20 - ∆p gas pressure point
21 - Flue sample point
22 - Fumes hood
23 - Safety thermostat
24 - Flow probe
25 - Ignition electrode
26 - Burner
27 - Condensation module cover
28 - Return probe
29 - System expansion vessel
30 - Vent valve
31 - Boiler circulator pump
32 - System draining valve
33 - System pressure switch
34 - Three-way valve (motorised)
35 - DHW heat exchanger
36 - By-pass
37 - 3 bar safety valve
G - Gas supply
SC - Condensate drain
AC - Domestic hot water outlet
AF - Domestic cold water inlet
R - System return
M - System flow
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