3.2.2 Electrical parts
1
Safety temperature limiter (eSTL)
2
Ignition electrode
3
Boiler control panel (WCM-CUI)
4
Gas combi valve
5
Connection box (W-EAB)
6
Boiler electronics (WCM-CPU)
7
Gas pressure switch
8
Ionisation electrode
9
Ignition unit
0
Fan
q
Supply sensor
w
Flue gas sensor
e
Return sensor
r
Water level interlock
t
Air pressure switch
z
Flue gas pressure switch
Installation and operating instruction
Gas condensing boiler WTC-GB 90-A
3 Product description
83266502 • 1/2010-08 • La
12-95