Technical data

6 720 611 443 GB (03.11)
Commissioning
23
4.2.2 Internal 24v
Non-supplied Worcester Bosch parts required:
•See section 4.1 to gain access to the boiler mains
wiring centre
•Keep the link connecting the Ls and Lr terminals
•Refer to instructions supplied with each part
•Externally wired frost protection is not required as
this is provided by the boiler’s internal frost thermo-
stat and the TR2 room thermostat.
5Commissioning
Fig. 32
8.1 Pressure gauge
15 Safety valve
27 Automatic vent
61 Reset button
135 Master switch
136 Temperature control for central heating
170 Service cocks on CH flow and return
171 Optional cylinder flow (used only with motorised valve)
172 Gas cock (shown in on position)
173 Optional cylinder return (used only with motorised valve)
295 Appliance type sticker
310 Temperature control for hot water
317 Multi function display
358 Condensate trap
363 Indicator lamp for burner
364 Indicator lamp for power supply
365 “Chimney sweep” button
366 Service button
367 ECO button
Description Part Number
24v Diverter valve (including
tank NTC)
7 719 002 090
TR2 room thermostat 7 774 901 137
Night set back module 7 744 901 136
Twin channel programmer 7 716 192 032
Table 10
365
61
317 366 367
ECO
364
135
295
136
170
171
E
6 720 610 576-07.2O
15
310
363
358
8.1
173
170
172
27