6
Typical Gravity DHW
with pumped central heating
DHW = Domestic
Hot Water
Wiring
Typical fully pumped system
with spring return zone valve in heating
Given below are typical wiring diagrams for various types
of systems.
Note: Whilst every attempt has been made to ensure the accuracy of this
information it is recommended that the specifi c information relating to the
ancillary controls is obtained from the manufacturers concerned.
NL123456
3 amp fuse
D.H.W.
HTG
ON
OFF
Mains
Supply
N
L
Programmer
Terminals
L
N
N
N
Boiler
Pump
Room
Stat
ON
OFF
NL123456
3 amp fuse
D.H.W.
HTG
ON
OFF
Mains
Supply
N
L
Programmer
Terminals
L
N
N
N
Boiler &
Pump
HTG
valve
Room
Stat
Cyl.
Stat
ON
OFF
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