42
INS
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39
1.36 INDOOR UNIT MAIN COMPONENTS.
Key:
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 - DHW heat exchanger
12 - System draining valve
13 - DHW probe
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 - Boiler pump
22 - 3 bar safety valve
23 - Bypass
24 - 3-way valve (motorised)
25 - Valve drain fitting signal
26 - System filling valve
