Electrics; Commissioning - Bosch GREENSTAR HEATSLAVE EXTERNAL 18/25 Instruction Manual

8 716 113 389d 30/3/10 14:01
1
230V
MAINS
SUPPLY
D
2/3
Accelerator
resistor
(if fitted)
6
FROST
STAT(1)
CONTROL
BOARD
28

ELECTRICS

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Page 28
B
C
4
G
F
E
G
ROOMSTAT
PROGRAMMER (EXTERNAL)
5
clock
FROST
STAT(2)
7 k 7
X2
Ns Fs F L Ls F
R R R
Fuse
X4
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32
ELECTRICS
B
IMPORTANT: THIS APPLIANCE
PROVIDES A PERMENANT EXTERNAL
ELECTRICAL SUPPLY FOR SERVICING
AND MUST THEREFORE BE FED VIA A
CIRCUIT BREAKER INCORPORATING
EARTH LEAKAGE PROTECTION.
IMPORTANT: OBSERVE ELECTRONIC
STATIC DISCHARGE PRECAUTIONS.
DO NOT TOUCH THE PCB CIRCUITS.
A
WARNING: EXTERNAL EQUIPMENT
OPERATED AT 230 VOLTS SHOULD NOT
BE SERVICED OR REPAIRED UNDER
ADVERSE WEATHER CONDITIONS.
Access to 230V connections:
P
1 Release screws (B) and remove cover
panel (C) from control box (A).
2 Release screws (D) from cable clamp (E).
Pull inner clamp part (F) outwards.
Feed sufficient power cable (G) through the
cable clamp (E) and secure grip with screw (D).
Separate wires from cable end and strip to 6mm.
230V connections (terminal block X1):
M
3 Connect LIVE wire (Brown) to terminal L.
Connect NEUTRAL wire (Blue) to
terminal N.
Connect EARTH wire (Green/Yellow) to
the connector
Route the power cable down the side panel and
CH channel
through the service duct to the internal property
connection point avoiding any potentially hot
HW channel
surfaces.
Any external device connected to the
boiler must take its power supply from
the boiler supply only and must NOT
have a separate supply.
Terminal block (M) is provided with links (P) to
test fire the boiler with DHW and CH
permenant demand. Links (P) must be removed
and a suitable programmer connected before
M

commissioning.

External 230V programmer
N
(terminal block X4):
L
4 Remove 4 pin plug (M) from X4.
Remove test links (P) from plug block (M).
DHW
Connect wires to plug block (M) as shown.
CH Fit plug into terminal block X4.
Connect earth to terminal block X1connector
230V room thermostat (terminal block X2):
6 Remove link (K).
Connect LIVE supply to terminal L
Connect SWITCHED LIVE supply to
terminal L
NOTE: This is sometimes referred to as
Connect NEUTRAL to terminal Ns.
NOTE: Some devices do not require this.
Refit electric control panel cover:
Refit panel (C) and secure with screws (B).
NOTE: Both frost thermostats are fitted as
8 716 113 389d (03/2010)
DANGER - 230V:
ISOLATE THE MAINS ELECTRICITY
SUPPLY BEFORE STARTING ANY
WORK AND OBSERVE ALL RELEVANT
SAFETY PRECAUTIONS.
.
.
S
.
R
'call for heat' or 'heating load'.
standard to the external appliance to
provide frost protection.
.