Hydraulic Diagram - Immergas HERCULES Solar 26 1 A Instruction Booklet And Warning

3
- TECHNICIAN
BOILER START-UP (INI-
TIAL CHECK)
(INITIAL CHECK)
To commission the boiler:
- ensure that the declaration of conformity of
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.

3.1 HYDRAULIC DIAGRAM.

Key:
Fig. 3-1
- check that the air vent valve cap is open and
that the system is well deaerated;
- switch the boiler on and check correct igni-
tion;
- check the ∆p gas values in domestic hot water
and central heating modes;
- check the CO
2
minimum flow rate;
- 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;
1 - Storage tank unit draining valve
2 - Magnesium anode
3 - D.H.W. expansion vessel
4 - Domestic hot water probe
5 - Stainless steel coil for storage tank
6 - System draining valve
7 - Polyphosphate dispenser (optional)
8 - System filling valve
9 - 3 bar safety valve
10 - Manifold draining valve
11 - Condensate drain trap
12 - Gas valve
in the fumes at maximum and
- 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 instal-
lation room where provided.
If any checks/inspection give negative results, do
not start the boiler.
13 - Gas valve outlet pressure point (P3)
14 - Air intake pipe
15 - Fan
16 - Gas nozzle
17 - Detection electrode
18 - Burner
19 - Flue safety thermostat
20 - Condensation module covers
21 - Condensation module
22 - Manual air vent valve
23 - Fumes hood
24 - Air sample point
25 - Flue sample point
26 - ∆p gas pressure point
27 - Delivery probe
28 - Safety thermostat
29 - Ignition electrode
30 - Boiler Pump
31 - System pressure switch (absolute)
32 - Three-way valve (motorised)
33 - Venturi positive sign P1
34 - Venturi negative sign P2
35 - Air/gas Venturi manifold
36 - System expansion vessel
37 - Vent valve
38 - Hydraulic manifold
39 - Zone 1 pump
40 - Zone 1 one-way valve
41 - Zone 1 by-pass
42 - Filter mixing valve
43 - DHW mixing valve
44 - Cold water inlet valve
45 - Cold water inlet filter
46 - Flow limiter
47 - Cold water inlet non-return valve
48 - 8 bar safety valve
49 - DHW recirculation pump (optional)
50 - Solar stainless steel coil
51 - Solar expansion vessel
52 - Manual air vent valve
53 - Shut-off valve with thermometer
54 - Safety valve with manometer
55 - One-way valve (OV 20)
56 - Solar pump
57 - Flow meter
58 - One-way valve (OV 15)
RA1 - Zone 1 system return (High temperature)
MA1 - Zone 1 system flow (High temperature)
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic cold water inlet
RC - Domestic hot water recirculation
RP - Return from solar panels
MP - Flow from solar panels
SC - Condensate drain
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