Danfoss Heating
9
GB
3.4 Typical Gravity DHW Pumped HTG with
Spring Return Zone Valve in DHW
Other Danfoss Randall products suitable for use with above circuit:-
AT cylinder thermostat;
HP28C motorised zone valve with spring return actuator and SPDT
auxiliary switch.
N L 1 2 3 4 5 6
3 amp fuse
D.H.W.
HTG
ON
OFF
Mains
Supply
N
L
Programmer
Terminals
N
N
N
Boiler
Pump
Room
Stat
ON
OFF
N
S.R.Z.V
in DHW
Cyl.
Stat
