Electrical (Without Diverter Valve) - Worcester GREENSTAR 35 CDi Installation, Commissioning And Servicing Instructions

4.7

ELECTRICAL (WITHOUT DIVERTER VALVE)

CAUTION: ISOLATE THE MAINS ELECTRICITY SUPPLY
BEFORE STARTING ANY WORK AND OBSERVE ALL
RELEVANT SAFETY PRECAUTIONS
Danger of short circuit: When connecting the cables ensure that no
cable pieces fall into the Heatronic.
Mains supply to the boiler must be through a fused
double pole isolator situated adjacent to the appliance.
The isolator must have a contact separation of 3 mm
minimum in all poles.
Access to electrical connections:
▶ Remove boiler casing to access control panel.
1. Press in the centre of the white plastic clip securing the control panel,
slide down to release and lower into the service position.
2. Unscrew the three screws (B) on the back of the control panel and pull
off the connections cover.
3. Unclip the cable clamp (C).
4. Cut off the tapered cable entry to fit cable diameter required.
5. Turn cable retaining screw (D) anti-clockwise. Run cable over the
main crossbar and through the cable clamp (C), ensuring there is
ample cable to reach the connectors.
Turn cable clamping screw (D) clockwise to secure cable and replace
clamp (C) into control panel.
6. Mains power 230 V connection (ST10) pre-mounted:
▶ Separate wires from cable end and strip to 6mm
▶ Connect LIVE wire to terminal (L)
▶ Connect NEUTRAL wire to the terminal (N)
▶ Connect EARTH wire to the earth connector (
Earth cable to be longer so that it pulls out last if mains
cable is snagged.
7. 230 Volt room thermostat and/or external timer (ST10):
▶ Remove link
▶ Connect room thermostat LIVE supply to terminal (LS)
▶ Connect room thermostat SWITCHED LIVE return to terminal (LR)
▶ Connect room thermostat NEUTRAL to terminal (NS)
8. Refit control panel cover:
▶ Refit panel and secure with screws (B).
▶ Bring the control panel to its upper position and secure by sliding the
white plastic clip up.
▶ External diverter valve(s) and all other 230 V parts are
not supplied with the boiler.
▶ A fascia mounted programmer/timer should not be
fitted unless optional integral diverter valve is used.
▶ Refer to manufacturers instructions when connecting
external parts to the wiring centre. Worcester, Bosch
Group cannot be held responsible for wiring errors.
6 720 812 175 (2014/07)
6.
)
Fig. 39 Electrical connections
1.
C
3. 4.
EARTH = NEUTRAL =
E
LIVE = SWITCHED LIVE =
230V
E L
N
ST10
L L N N L
R S S
L L N N L
R S S
ST10
INSTALLATION
B
2.
5.
D
D
7.
EXTERNAL
CONTROLS
WIRING CENTRE
ST10
L L N N L
R S S
ST19
B
B
4
2
FR FS NP LP
1
A
ST8
F
ST6
Code Plug
27