6.3.2
Electrical connection
Fig.35
Boilers in c 1 underfloor heating c 1 direct c 1 domestic hot water tank
1
2
3
4
A
ux 1-2 230 V
TA
TS
L
N
T1
T2
L
L
N
N
S1
S2
L
N
1
2
3
4
A
ux 1-2 230 V
TA
TS
L
N
T1
T2
L
L
N
N
S1
S2
L
N
MW-3000040-08
167
200
201
167
61
117
93 44
34
34
26
2
38
33
38
AVS75
(OCI345)
1 2 3
1 2 3
X30
X40
X41
X30
X40
T
124
21
T
123
320
(OCI345)
320
310
2 Heating pump direct circuit
21 Outside temperature sensor
26 DHW booster pump
33 Domestic hot water temperature sensor
34 Modulating boiler pump (primary pump)
38 Room temperature sensor
44 France: 65 °C safety thermostat with manual reset
for underfloor heating (DTU 65.8, NF P52-303-1)
Austria: safety device to safeguard against
overheating: according to the type of underfloor
heating
Other countries: safety device to safeguard against
overheating of the underfloor heating, in accordance
with prevailing regulations
61 Mixed circuit flow sensor
93 Mixed circuit heating pump
117 Three-way mixing valve
123 Cascade return sensor
124 Cascade flow sensor
167 Boiler control panel
200 Lead boiler
201 Slave boiler
310 AVS75: option
320 OCI345: communication module for cascade (option)
6 Connecting diagrams and configuration
7702703 - v04 - 05092019
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