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1.37 MAIN COMPONENTS
Key (Fig. 40):
1
- System expansion vessel
2
- Burner
3
- Ignition/detection electrode
4
- Air intake pipe
5
- Flow probe
6
- Fan
7
- Condensate drain trap
8
- D.H.W. flow switch
9
- Gas nozzle
10
- Gas valve
11
- D.H.W. heat exchanger
12
- System draining cock
13
- D.H.W. probe
56
14
- Sample points (air A) - (flue gases F)
15
- Flue probe
16
- Condensation module
17
- Venturi
18
- Return probe
19
- System pressure switch
20
- Air vent valve
21
- Appliance pump
22
- 3 bar safety valve
23
- By-pass
24
- 3-way valve (motorised)
25
- Valve drain fitting signal
26
- System filling cock
40
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