Bosch ZSB18 - 2A Installation And Servicing Instructions page 33

AU/NZ
System wiring centre connection (ST10)
Remove the link between L
B Connect the LIVE feed wire from terminal (LS) to the
LIVE on the system wiring centre.
B Connect NEUTRAL wire from terminal (NS) to the
neutral on the system wiring centre.
B Connect SWITCHED LIVE wire from terminal (LR) to
the boiler demand on the system wiring centre.
A pump is already fitted to the boiler!
No other pump should be fitted.
B Refit the control panels removed earlier.
Wiring Centre/Junction Box
L N E
Fig. 49 Wiring centre
NOTE:
B External diverter valve(s) and all other
240V parts are not supplied with the
boiler.
B A fascia mounted programmer/timer
cannot be fitted unless optional integral
diverter valve is used.
B Refer to manufacturers' instructions
when connecting external parts to the
wiring centre.
B Robert Bosch cannot be held responsible
for wiring errors.
B There is an option to fit an internal
diverter valve. This also requires fitting an
extra harness and a code plug change.
See "optional diverter valve" instructions
supplied with the integral diverter valve
kit.
B Option integral diverter valve kits:
18kW - 7 716 192 568
B This option is covered in the fault finding
guide on page 61 of these instructions.
and L on ST10.
R S
230V
MAINS
SW
SUPPLY
N E L
switched live
neutral
live
N
L L N L
R S S
ST10
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Optional external frost stat connection (ST6)
Frost Thermostat
FR
ST6
Fig. 50 Frost Thermostat
B Connect frost thermostat cables to terminals F
F .
R
B These are not polarity sensitive.
Installation | 33
FS NP LP
6720643895-43.1Wo
S
6 720 646 195a (2010/11)
and