INSTALLATION
21 INTERNAL WIRING
A pictorial wiring diagram is shown.
1.
Route the mains cable into the bottom of the casing.
2.
If an on/off roomsthermostat is to be fitted remove
plastic link across 1 & 2 and connect wires to
to terminals 1 & 2.
I
J
M
G
Connector for
external 3 way valve
(optional)
E
F
M
1 2
1 2
1 2 3
L
N
1 2 3 4
24VAC
0V
- max 6 VA
0
1 2
3 4
5
6
7 8
9
11
10
Weather
compensation
(optional)
24VAC
output
Volt free
alarm kit
(optional)
3
4
MBC 5
1
2
On/Off
'Loop'not conducting
(remove when used)
'Loop'conducting
(remove when used)
Ionisation
e
lectr
ode
Hot surface
ignitor
A
C
B
Control panel
18 pin. connector
Fan
Circulation pump
(max. 2A)
MAINS
230V
50Hz
Fuses, main switch, safety switch
and/or further safety precausions,
follow local regulations
When used remove
bridge connector
20 pin. connector
20
16 17 18 19
10
12 13 14 15
11
4
3
5 6 7 8 9
1
2
H
16 17 18
10
12 13 14 15
11
4
3
5 6 7 8 9
1 2
yellow/blue
pink
pink
black
yellow
purple
blue
br
own
pink
purple/r
ed
gr
een/black
white
red/white
black/white
gr
ey/white
blue/white
pink
purple/white
black/r
ed
black/white
pink
br
own/r
ed
re
d
blue/r
ed
gr
ey/r
ed
yellow/r
e
d
gr
een/r
ed
F Safety sensor
G Supply sensor
H Boiler identification module
I
ignition gas valve
J
main gas valve
K hot water tank sensor kit
Note!
1) Only 1 external controller may be connected.
2) Only 1 controller MBC5
may be connected.
A Flue gas temperature limiter (optional)
B Potential free connection (bridge connector)
C Burner safety protection
D Not present
E Return sensor
Terminal
connection
box
Colour codes:
1
white
2
red/white
3
green/red
4/5 green/red
6
grey/red
7
green/black
8
black/white
9
red/white
10 pink
11 yellow/red
L
N
K
22 PICTORIAL WIRING
1
2
3
1
2
3
4
5
6
ON/OFF
Roomthermostat
MBC5
volt free alarm kit
211090 UK / 211093 UK
211292
219053 [Caradon]
Maximiser SE
- Installation
18