ROOMSTAT
L
N
F
R
L
R
Ns Fs F
R
Ls
N
L
DHW
CH
ELECTRICS
green/yellow
1
DANGER - 230V:
ISOLATE THE MAINS ELECTRICITY
SUPPLY BEFORE STARTING ANY
WORK AND OBSERVE ALL RELEVANT
SAFETY PRECAUTIONS.
IMPORTANT: OBSERVE ELECTRO-STATIC
DISCHARGE PRECAUTIONS.
DO NOT TOUCH THE PCB CIRCUITS.
Access to 230V connections:
1
4
Release screws (B) and remove cover
panel (C) from control box (A).
2
4
Release screw (D) from cable clamp (E).
4
Pull inner clamp part (F) outwards.
4
Feed sufficient power cable (G) through the
cable clamp (E) and secure grip with screw (D).
4
Separate wires from cable end and strip to 6mm.
230V connections (terminal block X1):
3
4
Connect LIVE wire (Brown) to terminal L.
4
Connect NEUTRAL wire (Blue) to terminal N.
4
Connect EARTH wire (Green/Yellow) to the
connector.
Route the power cable down the side panel using the
clip provided on the support panel to the external
connection point avoiding any potentially hot
surfaces and allowing sufficient cable to open the
control box.
Any external device connected to the boiler
must take its power supply from the boiler
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
permanent demand. Links (P) must be removed
and a suitable programmer connected before
commissioning.
Optional fascia mounted 230V programmer
(terminal block X4):
4
4
Remove blanking plate (J).
4
Set the pin on the rear of the programmer
(H) to ‘pumped’.
4
Clip programmer (H) into fascia panel.
4
Remove 4 pin plug from X4 and discard.
4
Connect programmer plug into terminal X4.
Optional external 230V programmer
(terminal block X4):
5
4
Remove 4 pin plug (M) from X4.
4
Remove test links (P) from plug block (M).
4
Connect wires to plug block (M) as shown.
4
Fit plug into terminal block X4.
4
Connect earth to terminal block X1connector
230V room thermostat (terminal block X2):
6
4
Remove link (K).
4
Connect LIVE supply to terminal L
S
.
4
Connect SWITCHED LIVE supply to
terminal L
R
.
NOTE:
This is sometimes referred to as ‘call for
heat’ or ‘heating load’.
4
Connect NEUTRAL to terminal Ns.
NOTE:
Some devices do not require this
.
Optional 230V 2 x single pole frost
thermostats (terminal block X2):
NOTE:
Two switched lives are required to ensure
correct operation of the PCB.
Both thermostats should be installed
together at the location where frost damage
could occur.
7
4
Connect common LIVE supply to terminal Fs.
4
Connect each SWITCHED LIVE to terminals F
R
.
Refit electric control panel cover:
4
Refit panel (C) and secure with screws (B).
E N L
C
B
B
A
H
4
J
P
M
G
D
E
F
2
3
X1
230V
MAINS
SUPPLY
blue
brown
X2
6
Neutral (
if required
)
Switc
hed Live
Live
FROST
STAT
FROST
STAT(2)
7 k 7
Accelerator
resistor
(if fitted)
PROGRAMMER (EXTERNAL)
5
clock
CH channel
HW channel
N Supply
L Supply
HW Demand
C
H
Demand
X4
Fuse
CONTROL
BOARD
.
M
ELECTRICS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE 12/18-18/25-25/32
6 720 802 432 issue A 04/2012
30
IN
ST
AL
LA
TION
