Installation
Bosch Condens 5000W – 6 720 646 195 (2018/10)
30
Refer to figure 48.
1. Unscrew the three screws in the control panel.
2. Remove the connections cover.
Fig. 48 Removing the connection cover
Fig. 49 Electrical connector information
[SI1] Fuse F1 - 2.5A
[SI2] Fuse F2 - 0.5A
[SI3] Fuse F3 - 1.5A
[ST6] Frost thermostat connection
[ST10] Mains In (230V) and external controls connections
[ST19] EMS BUS connection
System wiring centre connection (ST10)
Pre-wired link
▶ Remove the pre-wired link between L
R
and L
S
on ST10
▶ Connect the LIVE feed wire from terminal (L
S
) to the LIVE on the
system wiring centre.
▶ Connect NEUTRAL wire from terminal (N
S
) to the neutral on the
system wiring centre.
▶ Connect SWITCHED LIVE wire from terminal (L
R
) to the boiler
demand on the system wiring centre.
Fig. 50 Wiring centre connections to the boiler
A pump is already fitted to the boiler!
No other pump should be fitted.
▶ Refit the control panels removed earlier.
NOTE:
▶ External diverter valve(s) and all other 240V parts are not supplied
with the boiler.
▶ A fascia mounted programmer/timer cannot be fitted unless optional
integral diverter valve is used.
▶ Refer to manufacturers‘ instructions when connecting external parts
to the wiring centre.
▶ Robert Bosch cannot be held responsible for wiring errors.
▶ 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.
▶ Option integral diverter valve kit: 18kW - 7 716 192 568
▶ This option is covered in the fault finding guide on page 56 of these
instructions.
Optional external frost thermostat connection (ST6)
▶ Connect frost thermostat cables to terminals F
S
and F
R
.
– The frost thermostat connections are not polarity sensitive.
Fig. 51 Frost thermostat connections
1.
1.
1.
2.
6720643895-40.1Wo
6720644743-19.1Wo
ST10
ST6
SI2
SI3
SI1
ST8
6720644743-20.1Wo
L
N
S
N
L
SLR
N
blue
brown
green/yellow
live
switched live
neutral
E
ST10
230V
MAINS
SUPPLY
L
NE SWL
Wiring Centre/Junction Box
Frost Thermostat
FSFR NP LP
ST6
6720643895-43.1Wo
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