Technical data

INSTALLATION
6 720 648 547 (2012/06)26
Fig. 37 Plume distance to opening
4.6 CONDENSATE CONNECTION
Never terminate or discharge into any open source, including; sink,
bath, shower, bidet, toilet etc.
• Ensure that the condensate drain is 22 mm diameter plastic pipe. It
must fall at least 50 mm per metre towards the outlet.
• An adaptor (A) in 22 mm pipe is contained in the fitting pack.
4.7 ELECTRICAL
Danger of short circuit: When connecting the cables ensure that no
cable strands fall into the Heatronic.
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 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 the cable clamping screw (D) clockwise to secure the cable and
replace the clamp (C) into control panel.
6. Mains power 230 V connection (ST10):
▶ Separate the wires from the cable end and strip the wires back by
6mm
▶ Connect the LIVE wire to the terminal (L)
▶ Connect the NEUTRAL wire to the terminal (N)
▶ Connect the EARTH wire to the earth connector ( )
7. External controls wiring box (ST10):
▶ Remove the link
▶ Connect the wiring box LIVE supply to terminal (LS)
▶ Connect the wiring box LIVE return to terminal (LR)
▶ Connect the wiring box NEUTRAL to terminal (NS)
1 Opening in building
2 Flue discharge
3Plume deflector
4 Minimum 1500mm from an opening in the building
Table 18 Key to figure 37
Any external condensate pipe work of excessive runs
should be protected with weather resistant insulation to
help prevent freezing.
6720643895-119.1Wo
1
3
4
2
CAUTION: Isolate the mains gas supply before starting
any work and observe all relevant safety precautions.
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.
Ensure that the Earth cable is longer than the others so
that it pulls out last if the mains cable is snagged.
▶ For a description of the wiring box see proprietary
instructions.
▶ Refer to manufacturers instructions when connecting
external parts to the wiring centre. Worcester, Bosch
Group cannot be held responsible for wiring errors.