19
INSTALLATION
IMAX XTRA EL
-
Installation & Servicing
4
CUI GN
D
3
CUI +7
.5/12V
2
CUI EBUS
+
1
CUI
MO
DE
CU
I
1234
##
987654321
65432
12
121212
14321321543214321432132132121
WP
S
DP
FL
OW
IG
N
FG
PS
I6
I5
DIAGNOST
IC
AP
S
1
2345678
12
FS
I3
I1
1
23456
71
23
4
IL
1
`
I4
1234
IL
2H
X
To
Cha
ssi
s
PE
FC
12
3
No
te
: 0.75
mm
sq
45
GV
`
Blue
a
nd br
ow
n
fr
om
I2
1
I2
2
To
Ch
as
si
s
PE
3
12
3
FP
GV
E
To
Fr
am
e
PE
GA
S
To
HX
PE
VA
LV
E
WA
TE
R
PRESSUR
E
1
SW
IT
CH
2
4
3
IG
NI
TI
ON
FA
N
EL
EC
TR
OD
E
1
2
H/
X
21
AI
R
PRESSUR
E
SW
IT
CH
CH SWITCHED LI
VE
PRESSURE
FL
UE
GA
S
DHW/CH2 SWITCHED LIVE
SW
IT
CH
FL
OW
PUMP
-L
MAINS SUPPLY-PE
MAINS SUPPLY-
N
MAINS SUPPLY-
L
DIVERTER VALVE-
L CH
GAS VAL
VE-PE
DIVERTER VALVE-
L DH
W
GAS VAL
VE-N
PUMP
-PE
PUMP
-N
GAS VAL
VE-L
GAS VAL
VE-N
DIVERTER VALVE-PE
DIVERTER VALVE-N
FAN-L
IONISATION-PE
IONISATIO
N
IGNITION-PE
IGNITION-
N
FLOW
-NTC+
X1
3X
3
IGNITION-
L
X2
BX
2A
X1
D
X7
CX
7B
RETURN-NTC+
RETURN-NTC-
DHW-NTC+
DHW-NTC-
EBUS +
PR2
EBUS - (GND)
FAN-PE
FAN-N
PR3
PR3
PR2
OWC-NTC+
OWC-NTC-
OPENTHER
M-
OPENTHER
M+
FLOW
-NTC-
L
NO
L
NO
PE
N
GND
NC
0-10
V +
WPS +
WPS -
NC
0-10
V -
FAN-SPEED
PE
PUMP
PWM
RE
TU
RN
RE
T
BOIL
ER/CH PU
MP
DH
W
DIVERT
ER/PUM
P
CUI GND
X8
X6
CUI +7.5/12V
CUI EBUS +
CUI MODE
X1
0
SE
LV
SE
LV
VO
LT
S FREE
230V
AC
X7
A
X1
CX
1B
X1
A
X4
PWN-FAN+VE
PWM-
FAN-VE
FLUE-NTC+
LN
FLUE-NTC-
PE
SUPP
LY
SW
LL
CH
DH
W
DH
W
0-
10
VO
pe
nT
he
rm
Ou
ts
id
e
Se
ns
or
FAUL
TR
UN
L
Pu
mp
PW
M
SW
L
N
DE
TE
CT
IO
N
3
2
EL
EC
TR
OD
E
1
L
NC
EMC FILTER
18 INTERNAL WIRING
INST
ALLA
TION
