Boiler Hydraulic Diagram - Immergas VICTRIX EXA 24 X 1 ERP Instruction Booklet And Warning

3.4 BOILER HYDRAULIC DIAGRAM.

Key:
1 - Condensate drain trap
2 - 3 bar safety valve
3 - Gas valve
4 - Air pressure switch
5 - Gas valve outlet pressure point (P3)
6 - Venturi positive sign (P2)
7 - Air/intake Venturi
8 - Venturi negative sign (P2)
9 - Fan
10 - Air/gas Venturi manifold
11 - Gas nozzle
12 - Detection electrode
13 - Flue probe
14 - Air intake pipe
15 - Condensation module
16 - Manual air vent valve
17 - Heat exchanger safety thermal fuse
18 - Air sample point
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19 - ∆p gas pressure point
20 - Flue sample point
21 - Fumes hood
22 - Safety thermostat
23 - Delivery probe
24 - Ignition electrodes
25 - Burner
26 - Condensation module cover
27 - Return probe
28 - System expansion vessel
29 - Vent valve
30 - Boiler circulator pump
31 - System draining valve
32 - System pressure switch
33 - Three-way valve (motorised)
34 - System filling cock
35 - By-pass
G - Gas supply
SC - Condensate drain (minimum internal
diameter Ø 13 mm)
RR - System filling
RU - Storage tank unit return
MU - Storage tank unit flow
R - System return
M - System flow
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