Electrical Connections - Worcester GREENSTAR Ri Installation And Servicing Instructions

INSTALLATION
4.6

ELECTRICAL CONNECTIONS

The mains supply to the boiler must be either:
B from a fused double pole isolator situated next to the
appliance. The isolator must have a minimum of 3mm
contact separation in both poles.
4
1
Fig. 38 Fused spur
-or-
B from a plug and unswitched socket.
2
4
3
Fig. 39 Unswitched socket
Use a 3 Amp fuse in both situations
1 Switched and fused spur
2 Unswitched fused spur
3 Unswitched socket
4 Power to the wiring centre
Tab. 17 Key to figures 38 & 39
32
ACCESS TO ELECTRICAL CONTROL PANEL:
B Remove boiler casing to access control panel.
1. Unscrew the three screws in the control panel.
2. Remove the connections cover.
B Unclip cable clamp.
B Cut off the tapered cable entry to fit cable diameter
required.
B Turn cable retaining screw anticlockwise
B Run cable through the hole in the main crossbar
marked "mains cable" and through the cable clamp,
ensure there is ample cable to reach the connectors.
B Turn cable clamping screw clockwise to secure cable
and replace clamp into control panel.
3. Mains power 230v connection (ST1):
– 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 earth bracket
4. External Pump (ST2): Max power 90 W
– Connect NEUTRAL wire to terminal (Np)
– Connect LIVE wire to terminal (Lp)
– Connect EARTH wire to earth bracket
5. Boiler Demand (from external wiring centre) (ST2):
– Connect SWITCHED LIVE wire to terminal (LR).
NOTICE: SYSTEM PUMP
B THE SYSTEM PUMP MUST BE
CONNECTED TO THE APPLIANCE FOR
THE PUMP OVER-RUN FACILITY.
2.
1.
ST1 ST2
3. 4.
Fig. 40 Wiring detail
6 720 644 744a (2010/10)
ST7
5.