Page
26
of
34
6.11.7 System controls
Figure 10: S-plan system wiring
Figure 11: Y-plan system wiring
N
N
N
2
E
E
E
E
L
L
L
X
Y
1
3
L
G
N
E
3
2
B
E
O
N
G
L
E
O
P
u
mp
B
o
ile
r
P
ro
g
ra
mm
e
r
R
o
o
m
The
rmo
s
ta
t
H
e
a
ting
Zon
e
V
a
lv
e
C
y
lin
d
e
r The
rmo
s
ta
t
H
W
Zon
e
V
a
lv
e
5 Amp Fused
Spur Isolator
Live (
L
)
Neutral (
N
)
Earth (
E
)
Heating On (
X
)
Hot Water On (
Y
)
L N E
N
N
N
N
N
N
N
L
G
N
E
3
2
B
E
O
N
G
W
E
O
N
N
N
2
E
E
E
E
L
L
L
X
Y
1
3
Z
R
o
o
m
Th
e
rmo
s
ta
t
Pro
g
ra
mme
r
Boile
r
Pump
H
W
Zon
e
V
a
lv
e
C
y
lin
d
e
r The
rmo
s
ta
t
Mid
-p
o
s
ition
V
a
lv
e
5 Amp Fused
Spur Isolator
Live (
L
)
Neutral (
N
)
Earth (
E
)
Heating On (
X
)
Hot Water On (
Y
)
Hot Water Off (
Z
)
L N E
N
N
N
N
N
N
N
