Hot Water
Energy
Storage
Unvented Cylinder
Installation & Maintenance Instructions for an unvented
hot water cylinder with internal thermal expansion
SEPT 2018
12
SOLAR HIGH LIMIT CONTROL
These schematic wiring
diagrams depict an IMIT
high limit control stat
and the connections are
numbered accordingly.
Where an alternative is
supplied connect as per
manufacturer’s instructions.
1
2
3
4
5
6
7
8
9 10
1
2
3
4
5
6
7
8
9 10
B
L
G
O
B
R
G
Y
ZONE VALVE
L
N
PUMP
E
3
2
E
C
1
2
HIGH LIMIT CONTROL
Mains supply
double pole
fused spur
230/220 3amp
L
N
E
E
C
1
2
HIGH LIMIT CONTROL
Mains supply
double pole
fused spur
230/220 3amp
L
N
E
1
2
3
4
5
6
7
8
9 10
1
2
3
4
5
6
7
8
9 10
B
L
G
O
B
R
G
Y
ZONE VALVE
1
2
3
4
5
6
7
8
9 10
1
2
3
4
5
6
7
8
9 10
B
L
G
O
B
R
G
Y
ZONE VALVE
L
N
PUMP
E
3
2
E
C
1
2
HIGH LIMIT CONTROL
Mains supply
double pole
fused spur
230/220 3amp
L
N
E
E
C
1
2
HIGH LIMIT CONTROL
Mains supply
double pole
fused spur
230/220 3amp
L
N
E
1
2
3
4
5
6
7
8
9 10
1
2
3
4
5
6
7
8
9 10
B
L
G
O
B
R
G
Y
ZONE VALVE
TYPICAL SCHEMATIC WIRING DIAGRAMS
