
Fully Pumped Heating System using RT021 room
stat, cylinder stat and Two (2 Port) Spring Return
Valves with auxiliary switches and a HP021/HP027
electronic programmer.
This diagram is schematic and should be used for guidance only.
18
INSTALLATION AND CONNECTION OF THE RT021 MUST BE
CARRIED OUT BY A SUITABLY QUALIFIED PERSON.
WARNING:
ISOLATE MAINS SUPPLY BEFORE COMMENCING INSTALLATION.
1
2
3
4
5
6
L
N
MAINS
SUPPLY
E
N
4
FROST
STAT IF
FITTED
CYL
STAT
PUMP &
BOILER
L
N
1
RT021
ROOM
STAT
L
ZONE
VALVE
ZONE
VALVE