ELECTRICS
CAUTION: ISOLATE THE MAINS
ELECTRICITY SUPPLY BEFORE STARTING
ANY WORK AND OBSERVE ALL
RELEVANT SAFETY PRECAUTIONS
230V
MAINS
SUPPLY
3
A
fuse
SYSTEM
WIRING
CENTRE
ISOLATOR
ADJACENT TO
APPLIANCE
PUMP
TI
M
E
R
R
OOM
S
T
A
T
TA
N
K
S
T
AT
WA
T
E
R
V
A
LV
E
(S
)
F
R
O
STST
A
T
Switched
live
demand
The mains supply to the boiler must be either:
•
from a fused double pole isolator situated
next to the appliance. The isolator must
have a minimum of 3mm contact separa-
tion in both poles.
or
•
from a plug and non-switched socket
Use a 3A fuse in both situations.
Access to electric control panel:
1 Remove boiler casing to access control panel.
2 Unscrew the three screws (A) in the control
panel and pull off the connections cover (B).
3 Unclip cable clamp (C).
4 Cut off the tapered cable entry to fit cable
diameter required.
5 Turn cable retaining screw (D) anti-clock-wise
6 Run cable through the fixed grommet in the
main crossbar marked “mains cable”and
through the cable clamp (C), ensure there is
ample cable to reach the connectors.
7 Turn cable clamping screw (D) clockwise to
secure cable and replace clamp (C) into
control panel.
8 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
9A 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
NOTE:
THE SYSTEM PUMP MUST BE
CONNECTED TO THE APPLIANCE
FOR THE PUMP OVER-RUN
FACILITY.
9B Boiler Demand (from external wiring centre)
(ST2):
Connect SWITCHED LIVE wire to terminal (L
R
).
9C System components wired into terminal strip
in accordance with system manufacturers
instructions.
Refit electric control panel covers:
Refit panel (B) and secure with screws.
Locate lugs at top edge of panel (A) and
clip in at base.
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR Ri
8 716 115 168a (06/2008)
24
ELECTRICS
IN
S
T
A
L
L
A
T
ION
