Boiler Hydraulic Diagram - Immergas VICTRIX EXA 28 1 ERP Instruction Booklet And Warning

3.4 BOILER HYDRAULIC DIAGRAM.

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 - Air pressure switch
8 - Gas valve outlet pressure point (P3)
9 - Venturi positive sign (P1)
10 - Air/intake Venturi
11 - Air/gas Venturi manifold
12 - Fan
13 - Gas nozzle
14 - Detection electrode
15 - Flue probe
16 - Air intake pipe
17 - Condensation module
18 - Manual air vent valve
19 - Heat exchanger safety thermal fuse
20 - Air sample point
21 - ∆p gas pressure point
22 - Flue sample point
23 - Fumes hood
24 - Safety thermostat
25 - Ignition electrode
26 - Flow probe
27 - Burner
28 - Condensation module cover
29 - Venturi negative sign (P2)
30 - Return probe
31 - System expansion vessel
32 - Vent valve
33 - Boiler circulator pump
34 - System draining valve
35 - System pressure switch
36 - Three-way valve (motorised)
37 - DHW heat exchanger
38 - By-pass
39 - 3 bar safety valve
40 - Air vent valve drain
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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