Boiler Commissioning (Initial Check); Hydraulic Diagram - Immergas INTEC 30 System External Installation Instructions Manual

3
BOILER COMMISSIONING
(INITIAL CHECK).
When commissioning the boiler, ensure the
appliance checklist, located at the rear of this
instruction booklet is completed.
To commission the boiler:
- ensure that the type of gas used corresponds to
boiler settings recorded on the appliance data
plate;
- check connection to a 230V-50Hz power
mains, correct L-N polarity and the earthing
connection;

3.1 HYDRAULIC DIAGRAM.

Key:
1 - Condensate drain trap
2 - 3 bar safety valve
3 - Gas valve
4 - Gas valve outlet pressure point (P3)
5 - Venturi positive sign (P1)
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 thermofuse
16 - Air sample point
17 - ∆p gas pressure point
18 - Flue sample point
19 - Flue hood
20 - Safety thermostat
21 - Flow probe
22 - Ignition electrode
23 - Burner
24 - Condensation module cover
25 - Return probe
26 - System expansion vessel
27 - Air vent valve
28 - Boiler pump
29 - System draining valve
30 - System pressure switch
31 - 3-way valve
32 - By-pass
G - Gas supply (not supplied as standard)
R - System return (not supplied as standard)
F - System delivery (not supplied as standard)
SC - Condensate drain (supplied as standard)
(minimum internal diameter Ø13 mm)
C - Cold fill
- switch the boiler on and ensure correct ignition;
- ensure the gas inlet working pressure is correct,
1.1 Kpa (Natural Gas), 2.75 Kpa (LPG);
- check and set expansion vessel air pressure to
1 bar;
- pre fill condense trap with clean water;
- fill and set system pressure to 1.2 bar;
- vent air from boiler and system, also allow
automatic vent function to run (Par. 3.13);
- check that the gas maximum and minimum
relative pressure values correspond to those
given in the handbook, Par. 3.15;
15
- 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 and in the boiler;
- check that the intake and/or exhaust terminals
are not blocked;
- ensure activation of all adjustment devices;
- ensure sealing efficiency of hydronic circuits;
- check ventilation and/or aeration of the
installation room where provided.
3-1