24
AVANTA 18v
System Only - Option 1
Typical “Y” plan Heating and DHW using 230v controls
'B' DHW
'A' HTG
'AB'
Check valve may
be necessary
Condensate
22mm Gas
22mm
Flow
22mm
Return
2 Channel
Time clock
230v Supply
Room Stat
DHW thermostat
Three way Mid position
valve - HTG and/or
DHW
Wiring Centre
AOVS002
ON
OFF
ON
OFF
ST699 Control
L
N
DHW
HTG
CALL
CALL
Clock
'B' DHW
'A' HTG
AB
AOVW002
Remove exist links
Boiler
E
L
N
N
X6
230v
Power Supply
5
L
X2
3
4
2
1
X4
3
4
2
1
E
System Pump
Must be wired direct to boiler
N
L
V4073
Mid Position Valve
L641 Cylinder
Thermostat
2
T6360/T4360
Room Thermostat
91
0
8
7
4
3
5
6
12
Wiring
Centre
230v - 1 - 50
3 amp Switched Spur
L
N
E
3
1
C
1
2
Blue
G/Yellow
White
Grey
Orange