9
W
iring
Typical control of Heating when provided by
Combination type Boiler
Typical Heating & Hot Water control system using 3 port
mid-position valve
1
2
3
5
6
COM
CALL
N
ROOM
'STAT
INPUT
OUTPUT
N
L
L
N
103E5
TERMINALS
MAINS
SUPPLY
FUSED
3 AMP
COMBI BOILER
TERMINALS
103E5
TERMINALS
1
2
3
5
6
MID-POSITION VALVE
L N
L
N
MAINS
SUPPLY
FUSED
3 AMP
BOILER &
PUMP
TERMINALS
RED OR
ORANGE
WHITE
OR
BROWN
BLUE
GREY
ROOM
'STAT
CYL.
'STAT
SAT
CALL
COM
N
LINK