Boiler Commissioning Initial Check; Boiler Hydraulic Diagram - Immergas VICTRIX EXA 24 X 1 ErP Instruction And Recommendation Booklet

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 lled
with water and that the pressure gauge indicates
a pressure of 1-1.2 bar.
- switch the boiler on and check correct ignition;

3.1 BOILER HYDRAULIC DIAGRAM.

- check the ∆p gas values in DHW (when the
boiler is connected to an external storage tank
unit) and in central heating mode.
- switch the boiler on and check correct ignition;
- 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
located 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 ow rate regulation devices (if set-
tings are modi ed);
25
- check the production of DHW (when the boiler
is connected to an external storage tank unit);
- check sealing e ciency of water circuits;
- check ventilation and/or aeration of the instal-
lation room where provided.
If even only a single safety check o ers a negative
result, do not commission the system.
Key:
1 - Condensate drain trap
2 - 3 bar safety valve
3 - Gas valve
4 - Gas valve outlet pressure point (P3)
5 - Venturi positive sign (P2)
6 - Venturi negative sign (P2)
7 - Air/gas Venturi manifold
8 - Fan
9 - Gas nozzle
10 - Detection electrode
11 - Flue probe
12 - Air intake pipe
13 - Condensation module
14 - Manual air vent valve
15 - Heat exchanger safety thermal fuse
16 - Air sample point
17 - ∆p gas pressure point
18 - Flue sample point
19 - Fumes hood
20 - Safety thermostat
21 - Delivery probe
22 - Ignition electrodes
23 - Burner
24 - Condensation module cover
25 - Return probe
26 - System expansion vessel
27 - Vent valve
28 - Boiler circulator pump
29 - System draining valve
30 - System pressure switch
31 - ree-way valve (motorised)
32 - System lling cock
33 - By-pass
G - Gas supply
SC - Condensate drain (minimum internal
diameter Ø 13 mm)
RR - System lling
RU - Storage tank unit return
MU - Storage tank unit ow
R - System return
M - System ow
3-1