INSTALLATION
22
IMAX XTRA -
Installation & Servicing
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
Transformer
6
5
X1 4
3
2
1
1
2
X2
GV
MCBA5407D
3
4
5
6
7
8
9
10
11
12
1
2
X3/4
X5
SUPPRESSOR
SUPPRESSOR
SUPPRESSOR
R2
R1
X8
3
4
1
2
3
4
5
6
7
8
9
10
11
12
12
34
56
78
910
1112
1314
1516
X10
X7
AM3
MASTER
OT
CENTER
Connection to Slave Wiring
Centre
TB1
CONTROLLER
ALARM
DHW CALL
CH CALL
DHW PUMP
OR VAL
VE
CH PUMP
MAINS IN
OUTSIDE
TEMP
0-10V INPUT
MASTER
RUN
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 APS1
KEY
- - - - - - - - - - - -
Flow thermistor Return thermistor Flue thermistor Heat exchanger thermistor W
ater 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
+
E
L
N
TACH
APS1
PW
INST
ALLA
TION
