Typical Gravity D.H.W pumped HTG with S.R.Z.V in
GB
D.H.W
TP9 (Switch 1 to PUMPED)
Mains
Supply
Other Danfoss Randall products suitable for use with the above control
circuit:-
AT Cylinder Thermostat.
HP28C Motorised Zone Valve with Spring Return Actuator and SPDT
auxiliary switch.
10
Terminals
N
L
3 amp
fuse
S.R.Z.V
W
C
OFF
OFF
N L 1 2 3 4 5 6
Cyl. Stat
Boiler
in HW
N
C
W
ON
ON
Remote
Sensor
Looping
Terminals
Pump
N
N
N