29
Figure 8-7:
Wiring Diagram - System models
Electrical
Figure 8-8:
Dual Thermostat
Wiring Diagram - Boiler House models
Overheat
Thermostat
Supply to
Burner
Mains
Supply
Control
Thermostat
L
L
E
E
N
N
Boiler Casing Earth
Connector to link Neutral wires (not supplied)
2
C
1
2
C
1
Note: No connection
to terminal 1
Note: No connection
to terminal 2
Br
Br
R
Y
R
2
C
1
C
1A
2A
N
7
8 9
G/Y
G/Y
G/Y
Bl
Bl
Br
L
L
E
N E
1011 12
5B
4B
G/Y
G/Y
Bl
1 2 3
5
4
6
CENTRAL
HEA
TING
DHW - ON
BOILER FEED
Br
Br
Bl
R
DHW - OFF
13
Br - Brown, Bl - Blue, R - Red, G/Y - Green/Yellow, Y - Yellow
Colour code:
N
L
E
Bl
Br
G/Y
N
L
CH
OFF
N L
HW
OFF
CH
ON
HW
ON
OPTIONAL:
Grant Electronic
7-day plug-in programmer
(Ref. EPKIT)
Bl
G/Y
Br
G/Y
Bl
Br
Br
E
L
N
L
E
N
Boiler
On/Off
Switch
Control
Thermostat
Limit
Thermostat
Pump
Burner
Boiler
Terminal
Blocks
Mains Supply:
Use 2 pole isolator
with power ‘ON’ indicator
Note:
MUST
The factory fitted link between
terminals 1 & 4
be removed
when the plug-in programmer is
fitted to the control panel.
