Installation and operating instruction
Oil condensing boiler WTC-OB 18-B
3 Product description
83311002 1/2018-03 La
10-132
3.3.2 Water and flue gas carrying parts
Image: WTC-OB 18-B VERS. W-PEA
1
2
5
3
4
6
8
9
0
q
w
7
1
Heating circuit flow
2
Heating circuit return
3
Safety valve connection
4
Flue gas connection
5
DHW circuit flow
6
Flue gas sound attenuator
7
DHW circuit return
8
Three way valve
9
Speed controlled circulation pump
0
Siphon
q
Heat exchanger
w
Connection inlet and outlet tap / expansion vessel