L
N
N
L
E
M
L
N
2 Port zone valve
supplied with
unvented cylinder
BOILER
MAINS IN
230 V MAINS SUPPLY
Dual thermostat
Safety limit
thermostat
Cylinder
thermostat
NOT REQUIRED USE
CYLINDER SENSOR SUPPLIED
Remove any links between
safety limit thermostat and
cylinder thermostat within
the dual thermostat
Terminal block LV iC-Range
ATAG Outdoor sensor 1kOhm*
n.a. = not applicable
ATAG Zone connection
OpenTherm or ON/OFF thermostat
n.a. = not applicable
DHW sensor T3
External safety contact
terminal block
PE
N
PE
L
N
L’
230V o
ut
230V Co
ntro
l
PE
N
L
230V in
N
L
230V o
ut
DO NOT CONNECT 230 VO
LT
* Mounting on north – north/east facade of the house. Prevent outside influences such as snow, ventilation air or chimney heat.
230V live output
to pump
E
N
L
E
L
N
SwL
230V out
230V Control
E
N
L
230V in
N
L
230V out
230V control terminal block iC-Range
N:
Neutral
L:
Live
E:
Earth
N:
Neutral
L:
Live
E:
Earth
L:
Live
N:
Neutral
SwL:
Switched live
230V live input only!
E:
Earth pump
N:
Neutral pump
L:
Live pump
230V live output
230V out
230V in LNE
Cylinder sensor
ATAG outdoor
sensor (optional)
ATAG ONE
ZONE
controller
DO NO
T CONNECT 230 V
OL
T
B
A
A
AB
AB
B
M
3-port diverter valve
The 3-port diverter valve on the system pipework with the
valve ports is the following orientation, (
AB
) port iS System
boiler, (
A
) port hot water cylinder & (
B
) port heating system.
AB: iS System boiler
A: DHW cylinder
B: Heating system
2-port valve supplied
with unvented
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