Typical fully pumped system with 3-port mid-
position valve
TP9 (Switch 1 to PUMPED)
Terminals
Mains
N
Supply
L
Other Danfoss Randall products suitable for use with the above
circuit:-
AT Cylinder Thermostat.
HS3 Three Port Mid-position Valve with a Spring Return Actuator.
N L 1 2 3 4 5 6
3 amp
fuse
Boiler &
Pump
C
W
C
W
ON
OFF
OFF
ON
Cyl. Stat
3 port mid-
position
valve
N
N
Remote
Sensor
N
Looping
Terminals
GB
11