32 | Installation AU/NZ
6 720 646 195a (2010/11)
4.7 Electrical
The mains supply to the boiler must be either:
• The mains electrical supply to the boiler and system
wiring centre must be common and through a three
pin plug and socket.
Access to electrical connections
B Remove boiler casing to access control panel.
Refer to figure 46.
1. Remove the screw securing the control panel.
2. Lower the control panel into the horizontal service
position.
Fig. 46 Moving control panel into the service position
Refer to figure 47.
1. Unscrew the three screws in the control panel.
2. Remove the connections cover.
Fig. 47 Removing the connection cover
Fig. 48 Electrical connector information
CAUTION: Isolate the mains electricity
B Remove the plug from the mains socket
to isolate the electrical supply before
starting any work on the boiler and
observe all relevant safety precautions.
The boiler is pre-wired with a 1½ metre
mains supply cable.
A spare strain relief block is supplied in case
the pre-wired cable is not used.
When stripping wires always ensure copper
strands do not fall into the control box.
1.
2.
6720644743-18.1Wo
SI1 Fuse F1 2.5A
SI2 Fuse F2 0.5A
SI3 Fuse F3 1.5A
ST6 Frost thermostat connection
ST10 Mains in & external controls connections
ST19 EMS bus connection
Tab. 22
1.
1.
1.
2.
6720643895-40.1Wo
6720644743-19.1Wo
ST10
ST6
SI2
SI3
SI1
ST8
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