22
xtra
-
Installation & Servicing
INSTALLATION
24 PICTORIAL WIRING DIAGRAM (MASTER BOILER)
HT
11
10
9
8
7
6
5
4
3
2
1
11
10
9
8
7
6
5
4
3
2
1
Damper
T
ransformer
65
X1
4321
12
X2
GV
MCBA5407D
3456
789
10
11
1
2
12
X3/4
X5
SUPPRESSOR
SUPPRESSOR
SUPPRESSOR
R2
R1
X8
34
1234
56
789
10
11
1
2
1
2
3
4
5
6
7
8
910
11
1213
1415
16
X10
X7
AM3
MASTER
OT
CENTER
Connection to
Slave Wiring
Centre
TB1
CONTROLLER
DHW
CALL
CH
CALL
DHW PUMP
OR VA
LV
E
CH PUMP
MAINS IN
OUTSIDE
TEMP
0-10V
INPUT
BS*
RY
1
RY
2
* Note. For BS open circuit is on, closed circuit is of
f.
TTL
DISPLA
Y
TB2
FUSE
LEGEND
NTC1
NTC2
NTC5
NTC7
PW
R1
R2
RY
1
RY
2
GV
BS
A
PS1
KEY
-
-
-
-
-
-
-
-
-
-
-
-
Flow thermistor
Return thermistor
Flue thermistor
Heat exchanger thermistor
W
a
ter pressure switch
Relay 1 230V
AC coil
Relay 2 230V
AC coil
Relay 1 Switch (signal)
Relay 2 Switch (signal)
Gas valve
Burner switch
Air pressure switch
w
y/g
g
or
v
-
-
-
-
-
white
yellow/green
grey
orange
violet
b
bk
br
r
pk
y
-
-
-
-
-
-
blue
black
brown
red
pink
yellow
v
w
g
or
bk
gy
bk
br
br
br
b
br
br
br
br
b
b
b
b
g
v
g
bk
bk
bk
br
r
r
r
v
w
bk
r
y
pk
r
b
bk
w
pk
r
bk
y/g
y/g
y/g
y/g
y/g
y/g
v
g
w
w
bk
bk
or
br
pk
y
bk
w
PWM
+
ELN
TACH
APS1
PW
INST
ALLA
TION