Installation & Maintenance Instructions for an unvented
hot water cylinder with internal thermal expansion
Hot Water
Energy
Storage
Unvented Cylinder
SEPT 2018
13
TYPICAL SCHEMATIC WIRING DIAGRAMS
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.
VARIANT DUAL THERMOSTAT WIRING
WIRING DIAGRAM 2 x TWO PORT ZONE VALVES (S-PLAN)
Danfoss TPOneM
NO2
N
NO1
S1 S2
NC2
L
COM
Note a link between Live and Com
is required on the TPOneM
(not required for low voltage use)
TWIN HEATING ZONE WIRING DIAGRAM
7B 8B
6B
9B 10B 11B 12B 13B 14B 15B 16B
5B
4B
3B
2B
1B
7T 8T
6T
9T 10T 11T 12T 13T 14T 15T 16T
5T
4T
3T
2T
1T
NC
Danfoss TPOneB
NO
COM
S1
S2
2B
4B
N
9B E
DHW ZONE - BLUE
BR
BL
GR
OR
G/Y
2B
5B
N
9B E
HTG ZONE 1 - RED
BR
BL
GR
OR
G/Y
PUMP
CONNECTOR
BL
BR
G/Y
N
3B
E
15B
2B
6B
N
9B E
HTG ZONE 2 - YELLOW
BR
BL
GR
OR
G/Y
IF FITTED
INCOMING MAINS TO BE CONNECTED TO
GREYED OUT TERMINALS—L,N, EARTH
LINKS ARE FACTORY FITTED AND SHOULD
ONLY BE REMOVED BY A COMPETENT
ELECTRICIAN
E
N
N
L
N
N
N
L
N
E
E
E
E
E
BL
BLUE
BR
BROWN
GR
GREY
OR
ORANGE
W
WHITE
G/Y GREEN/YELLOW
REMOTE SENSOR
(if fi�ed)*
REMOTE SENSOR
(if fi�ed)*
THERMOSTAT
7B
COMMON
8B
2
4B
1
*Op�onal extra.
Available separately
A
B
L
1
2
3
1T
2T
3T
L
N
E
A
B
L
1
2
3
HIGH LIMIT
CUT OUT
TEMPERATURE
SWITCH
1T
2T
3T
1B
2B
3B
HIGH LIMIT
CUT OUT
TEMPERATURE
SWITCH
L
N
IMMERSION
HEATER
BOILER CONTROL
THERMOSTAT
IMMERSION HEATER CONTROL
THERMOSTAT
BR
W
GR
7B
4B
8B
PRE-WIRE CONNECTIONS