22
1-28
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
1.26 BOILER COMPONENTS.
34 - Hydraulic manifold
35 - System expansion vessel
36 - Flow probe
37 - Safety thermostat
38 - Manifold draining valve
39 - System pressure switch (absolute)
40 - Boiler Circulator
41 - Sealed Chamber
42 - Gas valve
43 - Storage tank unit return one-way valve
44 - System draining valve
Key
1 - Stainless steel storage tank unit
2 - DHW recirculation pump (optional)
3 - Three-way valve (motorised)
4 - Zone 1 one-way valve
5 - Zone 1 pump
6 - Safety thermostat (mixed zone) (optional)
7 - Flow probe (mixed zone) (optional)
8 - Zone 2 pump (optional)
9 - Mixing valve (optional)
10 - Flue probe
11 - Condensation module
12 - Burner
13 - Ignition electrode
14 - Detection electrode
15 - Venturi
16 - Gas nozzle
17 - Fan
18 - Cold water inlet cock
19 - 8 bar safety valve
20 - Air intake pipe
21 - 3 bar safety valve
22 - D.H.W. expansion vessel
23 - System filling valve
24 - Condensate drain trap
25 - Polyphosphate dispenser (optional)
26 - Domestic hot water probe
27 - Storage tank unit draining valve
28 - Sample points (air A) - (flue gas F)
29 - Positive signal pressure point
30 - Negative signal pressure point
31 - Manual air vent valve
32 - Vent valve
33 - Zones management electrical connec-
tion box (optional)