Installation and operating instruction
Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact
12 Technical documentation
83309302 1/2018-05 La
162-196
12.9 Wiring diagram WEM-FA-G device electronics
WEM-FA-G
1
2
3
5
4
6
7
q
8
9
w
0
e
r
t
1
Ionisation electrode
2
Gas combi valve immersion coil/valve 2
3
Gas combi valve valve 1
4
PWM signal and fan return signal
5
Gas pressure switch (accessory)
6
eSTB flow sensor
7
Flue gas sensor
8
Flow sensor of multifunction sensor VPT
9
Multifunction sensor VPT
0
PWM signal and circulation pump return signal
q
Three way valve actuator
w
Ignition unit
e
Fan voltage supply 230 V AC
r
Circulation pump voltage supply 230 V AC
t
Protective conductor housing