Legend:
1 Flue gas non-return valve
2 Modulating Fan
3 Gas valve
4 Ionization and ignition electrode
5 Primary heat exchanger
6 BoilerowsensorNTC1
7 Boiler return sensor NTC2
8 Water pressure sensor P1
9 High-eciencypump
10 Siphon
11 Heater dirt trap
12 3-way valve
(Only for THISION S PLUS 13,
19 and 24. Available for the types
THISION S PLUS 34, 35L, 46 and
54 as an optional accessory.)
13 Automatic ventilator
14 3 bar safety valve
g Gas connection
v Boilerowconnection
r Boiler return connection
c Condensate drain
a Expansion vessel connection (only
types 13, 19 and 24. This is only
available for the types 34, 46 and
54, when a 3-way valve has been
installed as an accessory)
s Cylinder return connection
(Only types 13, 19 and 24. This is
only available for the types 34, 35L,
46 and 54, when a 3-way valve has
been installed as an accessory)
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