Benchmark ZWB 7-29 CC1 Installation And Servicing page 101

4.2 Electronic schemes
364
25 V
230 V
153
135
230V/AC
328
L N Ns Ls
302
328.1
mains supply
4.1 Ignition transformer
6 Heat exchanger overheat cut-out
6.1 Flue gas NTC sensor
6.3 Hot water sensor
18 Central heating pump
32 Flame sensing electrode
33 Spark electrodes
36 Temperature sensor in CH flow
52 Safety gas valve 1
52.1 Safety gas valve 2
56 CE 428 gas valve
61 Reset button
84 Motor (ZWB/ZB)
96 Microswitch, water switch (ZWB)
135 Main power switch
136 Heating outlet temperature potentiometer
151 Fuse T 2,5 A, 230 V AC
153 Transformer
161 Bridge
226 Fan
300 Code key
302 Ground electrical connection
310 Sanitary outlet temperature potentiometer
312 Fuse T 1,6 A, 24 V DC
313 Fuse T 0,5 A, 5 V DC
314 Strip connector for TA 211 E fitted programmer
315 Terminal block for programmer
317 Digital display
318 Internal programmable clock connection
328 230 V AC connection
7 181 465 346 GB (03.02)
o - orange g - green bl - black
33
365 61
4.1
136 310
151
LR
M
M
18 226
317
366
312
315
313
1 2 4 7 8 9
300
314
161
9
52
328.1 Bridge
363 Flame presence led
364 Electrical power led (0/I)
365 Chimney cleaner button
366 Technique service button
367 ECO button
r - red p - purple
363
367
ECO
318
g
6
g
o
r
r o
52.1
56
o
o
36
6.1
bl
bl
bl
32
bl
bl
6 720 610 576-08.2O
Appendix
84
p
M
p
p
96
53