101
EN
Cod. 3541V991 - Rev. 06 - 10/2022
OMNIA ST 3.2
Order Port Code Assembly unit Note
22 CN30
1 A
Reserved /
2 B
3 X
4 Y
5 E
6 P
3 Wires for connection with outdoor unit /7 Q
8 E
9 H1
Reserved /
10 H2
23 CN7
26 R2
Compressor run (the contact is closed when the compresor is working) 1
30 R1
31 DFT2
Defrost run (the contact is closed when the defrost is active) 1
32 DFT1
25 HT
Reserved 2
29 N
27 AHS1
Gas boiler (the contact is closed when the gas boiler is request) 1
28 AHS2
24 CN11
1 SL1
Reserved /
2 SL2
3 H
Room thermostat input (high voltage) 24 C
15 L1
5 1ON
SV1 (3-way diverter valve) plant / DHW B6 1OFF
16 N
7 2ON
SV2 (3-way valve) heat / cool 28 2OFF
17 N
9 P_c
Zone2 pump 2
21 N
10 P_o
Outside circulation pump / zone 1 pump 2
22 N
11 P_s
Solar panel pump 2
23 N
12 P_d
DHW boiler recirculation pump 2
24 N
13 TBH
DHW electric heater 2
16 N
14 IBH1
Internal backup heater 1 B
17 N
18 N
SV3 mixing (3-way valve zone 2) 219 3ON
20 3OFF
25 CN2 TBH_FB Port for automatic circ. breaker of TBH (shorted in default) /
26 CN1 IBH1/2_FB Port for automatic circ. breaker of IBH (shorted in default) /
27 CN22
IBH1 Control port for internal backup heater 1 /
IBH2 Reserved /
TBH Control port for DHW boiler electrical heater /
28 CN41 HEAT8 Reserved /
29 CN40 HEAT7 Reserved /
30 CN42 HEAT6 Reserved /
31 CN29 HEAT5 Reserved /
NOTES:
A: With accessory Temperature Probe. All these temp. probes can be used or not as a function of the type of the plant served by the unit.
B: Internal connections, it means that these terminals are used for the management of the indoor unit.
1: Dry contact without voltage.
2: Port provide 220-240VAC voltage. If the current of load is <0.2A, load can connect to the port directly. If the current of load is >=0.2A, the AC contactor is required to supply for the load.
Voltage 220-240VAC
Maximum running current (A) 0.2
Wiring size (mm
2
) 0.75
Connect the cable to the appropriate terminals as shown in the following pictures.
Fix the cable reliably and provide to pass the cable through the appropriate cable gland (refer to “dimensional data and connections” on page 87.
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