42
Fig. 26
10 - WIRING DIAGRAM
Fig. 27
Limit
Thermostat
Control
Thermostat
2
C
1
C
1A
2A
E
N
L
E
N
L
1
2
3
4
5
6
E
N
L
E
N
L
Supply to
Burner
Mains Supply: Use 2
pole isolator with
power "ON" indicator
G/Y
G/Y
G/Y
R
Bl
Bl
Br
Br
Br
Colour code: Br - Brown, Bl - Blue, R - Red, G/Y - Green/Yellow
Boiler
On/Off
G/Y
4B
5B
G/Y
Bl
Br
G/Y
Bl
Br
Boiler Terminal Block
E N L
240 V
50 HZ
L
N
E
Supply to
Burner
Frost
Stat
Pipe Stat
(if fitted)
1
3
4
N L
Pump
E
N
L
Wiring
Centre
1
2
3
4
5
6
7
8
9
1
0
Boiler Terminal Block
1
2
3
4
5
6
L
N
E
E
N
L
CH and HW controlled by 3-port mid position valve
Cylinder
Stat
1
C
2
Room
Stat
2
1
3
3-Port
Mid Position
Zone Valve
Blue
Green/Yellow
White
Grey
Orange
CH & HW controlled by two 2-port zone valves
Cylinder
Stat
1
C
Room Stat
2
1
3
2-port
Zone Valve
Motor
HTG
2-port
Zone Valve
Motor
DHW
Grey
Blue
Blue
Brown
Brown
Orange
Green/Yellow
Green/Yellow
Orange
Grey
Frost
Stat
Pipe Stat
(if fitted)
1
3
4
N L
E N L
240 V
50 HZ
Pump
E
N
L
Wiring
Centre
1
2
3
4 5
6
7
8
9
1 0
Boiler Terminal Block
1
2
3
4
5
6
L
N
E
E
N
L
L
N
E
Supply to
Burner
iQE Horizon Internal Oil Boiler
iQE Horizon Internal Oil Boiler
10.1
Control panel wiring diagram
10.2
Typical control system wiring diagrams
2 channel
Programmer
2 channel
Programmer
