21
Installation and Servicing
SECTION 2 - INSTALLATION
2.9 WIRING DIAGRAM
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
8
7
6
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
PE1
D
P
V
ie
w
f
ro
m
re
a
r
CH
R
CH
F
DH
W
RET
1
2
1
2
1
2
1
2
PE2
D
V
D
T
B
1
MA
L
N
D
V
C
O
T-
O
T+
O
W
C
O
W
C
E
FT
S
L
1
PS
1 P
S2
P
C
S
L
1
P
P
3
2
1
1
3
2
1
3
2
1
2
S
L
2
3
S
L
2
X
9
X
8
SL2
OWC +
OWC -
1
2
3
4
SL1
X
6
X
5
X
4
2
3
0
V
50
H
z
M
a
in
s
X
1
PE
X
2
PE
L
V
X
7
OPE
OPENTHERM -
CHIP COM BUS GND
CHIP COM BUS 5V
CHIP COM BUS RX
CHIP COM BUS TX
Pump Feedback
Pump PWM Out
Pump GND
Turbine Signal
Turbine GND
Turbine 5V
WPS Signal
WPS GND
WPS 5V
DHW Valve Q1/Q3
DHW Valve Q2/Q4
DHW Valve Q5/Q7
DHW Valve Q6/Q8
CH Valve Q1/Q3
CH Valve Q2/Q4
CH Valve Q5/Q7
CH Valve Q6/Q8
MAINS LIVE
MAINS NEUTRAL
AUXILIARY LIVE
CH LIVE
Cylinder Thermostat
PU
M
P
DH
W
F
L
O
W
T
UR
BI
N
E
W
A
T
ER
PR
ESS
UR
E
SW
IT
C
H
CH
RE
TU
RN
CH
FL
OW
DH
W
PR
IMA
RY
1
RE
TU
RN
2
3
4
CH Return The
CH Return Thermistor-
CH Flow The
CH Flow Thermistor-
DHW The
DHW Thermistor-
Primary Return The
Primary Return Thermistor-
black
grey
red
green
blue
brown
green/yellow
orange
pink
violet
yellow
white
-
-
-
-
-
-
-
-
-
-
-
-
bk
gy
r
g
b
br
g/y
o
p
v
y
w
KEY
r
r
r
br
b
b
b
b
b
gy
gy
gy
gy
bk
bk
bk
bk
bk
bk
bk
r
g/y
g/y
y
g
g
y
y
y
y
g
p
p
o
v
r
r
b
bk
w
bk
INST
ALLA
TION
