INSTALLATION
6 720 803 800 (2012/11)
27
Fig. 47 Plume distance to opening
4.7
ELECTRICAL
• The mains electrical supply to the boiler must be through either a
fused double pole isolator or a fused three pin plug and unswitched
socket situated, where practicable, adjacent to the boiler.
• The isolator must have a contact separation of 3mm minimum in both
poles.
• Any additional equipment connected to the boiler must not have a
separate electrical supply.
• External fuse rating 3A.
ACCESS TO ELECTRICAL CONNECTIONS:
▶ Access to all wiring connections are via the Installer access cover at
the bottom front of the control panel. No access is required to other
parts of the control board.
1. Refer to figure 48 and release the three captive screws securing the
Installer access cover.
2. Remove the Installer access cover.
Fig. 48 Removing the installer access cover
Low voltage connections
Fig. 49 Low voltage connectors
1
Opening in building
2
Flue discharge
3
Plume deflector
4
Minimum 1500mm from an opening in the building
Table 10 Key to figure 47
CAUTION:
Isolate the mains electrical supply before
starting any work and observe all relevant safety
precautions.
The boiler is pre-fitted with a mains supply cable. Route
the cable through the right hand side of the wall
mounting frame.
6720643895-119.1Wo
1
3
4
2
1
Low voltage connections
2
Mains voltage connections
3
Fuse carrier - 5A
Low voltage terminal strip
1
Low voltage room thermostat input (NOT USED)
2
EMS bus connections
3
External cut off switch (NOT USED)
4
Outdoor compensation sensor
5
Cylinder sensor (NOT USED on Combi)
6
Low Loss Header sensor (NOT USED)
Table 11 Key to figure 49
6720646608-16.1W
o
1
2
3
1.
6720646608-109.1W
o
EMS
1
2
3
4
5
6
