APR 2018
18
Hot Water Energy Storage
Unvented Cylinders
GB & NI
Installation & Maintenance Instructions for an unvented
hot water cylinder with external thermal expansion
The diagrams shown relate to the components listed. Other components and other manufacturers’
components may vary in their wiring requirements, particularly thermostats. Always refer to
manufacturers’ instructions which may override the detail in order to function correctly.
SINGLE ZONE HEATING
Wiring Diagram for Single
Zone Heating and Hot Water
Two channel Programmable
Room Stat with DHW Control
TWIN ZONE HEATING
Wiring Diagram for Twin
Zone Heating and Hot Water
Two channel Programmable
Room Stat with DHW Control
and Programmable Room
Stat
PRE-PLUMBED AND HEAT PUMP CYLINDERS
1
2
Red Plug - Heating 1
3
4
5
6
Wiring Diagram for Single Zone Heating and Hot Water
7
8
9
10
11
12
BL BR GR OR
B1 Br Gr Or
Blue Plug - Water
Pump
Two Channel Programmable
Room Stat With DHW Control
E
Green Plug
B1
Br
E
N L 3 4 5 6
W Y G/Y
G/Y
1
2
E
N L 1
2 3
Red Plug - Heating 1
3
4
5
6
Wiring Diagram for Twin Zone Heating and Hot Water
7
8
9
10
11
12
BL BR GR OR
BL BR GR OR
B1 Br Gr Or
Yellow Plug - Heating 2
Blue Plug - Water
Pump
Green Plug
B1
Br
E
N L 3 4 5 0
E
W Y G/Y
G/Y
Two Channel Programmable
Room Stat With DHW Control
Programmable
Room Stat
WIRING DIAGRAMS