Electrical - Worcester GREENSTAR HIGHFLOW 440CDi Instruction Manual

1
A
8
3
6
ST10
L
3
C
6
4
230 V
ST10
D
L
L
5
N
D
ST10
INSTALLATION & SERVICING INSTRUCTIONS
8 716 115 219c (03.2010)
2
B
E
EARTH =
L
LIVE =
N
NEUTRAL =
S
SWITCHED LIVE =
7
AND
THERMOSTAT
/OR
N
N L L
S S R
N N L L
S S R
E

ELECTRICAL

CAUTION: ISOLATE THE MAINS
ELECTRICITY SUPPLY BEFORE STARTING
ANY WORK AND OBSERVE ALL RELEVANT
SAFETY PRECAUTIONS
NOTE:
The mains electrical supply to the boiler and
system wiring centre must be common and
through either a common fused double pole
isolator or a fused three pin plug and
unswitched socket.
The isolator shall be situated next to the
boiler for new systems and, where
practicable, replacement boilers.
The isolator must have a contact separation
of 3mm minimum between all poles. Any
system connected to the boiler must not
have a separate electrical supply.
External fuse 3 Amps.
When stripping wires ensure copper strands
FROST do not fall into the control box.
Access to electrical connections:
Remove boiler casing to access control panel.
1 Remove screw (A) and swing the control
panel into the service position.
ST6
2 Remove the three screws (B) in the control
panel and remove the connections cover.
F N L
F
R S P P
3 Unclip cable clamp (C).
4 Cut off the tapered cable entry to suit the
cable diameter.
5 Unscrew cable retaining screw (D).
Run the cable through the cable clamp (C)
ensuring there is ample cable to reach the
connectors. Tighten the cable retaining
screw D to secure the cable and replace
clamp C into the control panel.
6 Mains power 230 Volt connection ST10:
Separate wires from cable end and strip
to 6mm
Connect LIVE wire to terminal L
Connect NEUTRAL wire to terminal N
Connect EARTH wire to connector
NOTE: Make the EARTH wire longer so that
7 Optional frost thermostat connection ST6:
Connect frost thermostat supply wire to
terminal Fs
Connect frost thermostat return wire to
terminal F
8 230V room thermostat and/or external timer
ST10:
Remove link
Connect room thermostat LIVE supply to
terminal Ls
Connect room thermostat LIVE return to
terminal L
Connect room thermostat NEUTRAL to
terminal Ns
9 Refit all panels
Refer to manufacturers instructions when
connecting external parts to the wiring centre.
Worcester, Bosch Group cannot be held
responsible for wiring errors.
if the cable is snagged, the EARTH
wire is the last to be pulled out.
R
R
ELECTRICAL
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