Electronic Schemes - Worcester ZSBR 7-28 ICS1 Service Booklet

Appendix
5.2

Electronic schemes

25 V
230 V
153
135
230V/AC
328
L N
302
mains supply
Fig. 2
4.1 Ignition transformer
6 Temperature limiter, heat exchanger
9 Flue gas temperature limiter
18 Pump
32 Flame sensing electrode
33 Ignition electrode
36 Temperature sensor in CH flow
52 Solenoid valve 1
52.1 Solenoid valve 2
56 Gas valve CE 427
61 Reset button
84 Motor, 3-way valve (ZSBR)
135 Master switch
136 Temperature control for CH flow
151 Fuse, slow 2.5 A, AC 230 V
153 Transformer
161 Link
46
33
364 365
4.1
136 310
151
Ns Ls LR
328.1
18
M
M
226
o - orange
61 317
366 367
312
313
1 2 4 7 8 9
300
161
9
52 52.1
226 Fan
300 Code plug
302 Earth connection
310 Temperature control for hot water
312 Fuse, slow T 1,6 A
313 Fuse, slow T 0,5 A
317 Digital display
328 Terminal block for AC 230 V Mains supply
328.1 Link
363 Indicator lamp for burner
364 Indicator lamp for power supply
365 "Chimney sweep" button
366 Service button
367 ECO button
400 Textdisplay
422 Connecting TR2
bl - black r - red p - purple
363
ECO
84
p
M
p
p
6
r
r
o
56
o
36
bl
bl
bl
32
bl bl
6 720 610 603 - 03.1O
7 181 465 347 (01.07)
400
3 4 F
422