MAXA i-32V504, User Manual

i-32V5 

Air/water inverter heat pumps with axial fansi

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The power cables, electrical protections and line fuses must be sized in accordance with what is reported in the unit's wiring diagram and in the 

electrical data contained in the technical characteristics table

Use a dedicated power line, do not power the appliance through a line to which other users are connected. Fasten the power cables securely and 

make sure they do not come into contact with sharp corners. Use double insulated cables with copper wires.

The ground connection must be carried out first during the connection phase, vice versa it must be removed last when the unit is disconnected. 

In the event of any loosening of the power cable, it must be ensured that the tension of the active conductors takes place before that of the 

ground wire.

A main switch or a disconnection device with adequate breaking capacity must be installed on the power supply line, which has a separation of 

the contacts in all the poles. The differential protection switch must be compatible with inverter appliances, it is recommended to install a type 

B differential switch, the installation of a different type switch could give rise to untimely trips.

The following table shows the recommended cable sections for a maximum length of 30 m. In any case, depending on type of installation, the 

location and the length of the cables (be it less than or greater than 30m), the electrical system designer will make an appropriate choice.

Power supply

Model

Recommended cable section

(max lenght 30 m)

Recommended tightening torque

230V / 1ph

i-32V504

3 x 2,5 mm2

L/N: 3,4 Nm – PE: 1 Nm

230V / 1ph

i-32V506 / i-32V508,

SL08

3 x 4 mm2

L/N: 3,4 Nm – PE: 1 Nm

230V / 1ph

i-32V510 / i-32V512,

SL12

3 x 4 mm2

L/N: 3,4 Nm – PE: 1 Nm

230V / 1ph

i-32V514 / i-32V516,

SL16

3 x 6 mm2

L/N: 3,4 Nm – PE: 1 Nm

400V / 3ph

i-32V510T / i-32V512T,

SL12T

5 x 2,5 mm2

L1/L2/L3: 3,4 Nm – N/PE: 1 Nm

400V / 3ph

i-32V514T / i-32V516T,

SL16T

5 x 2,5 mm2

L1/L2/L3: 3,4 Nm – N/PE: 1 Nm

400V / 3ph

i-32V518T

5 x 4 mm2

L1/L2/L3: 3,4 Nm – N/PE: 1 Nm

The units comply with the electromagnetic compatibility specifications, however the designer of the electrical system must fulfil appropriate 

assessments to ensure the absence of interference.

5.9.3 User terminal block

The connection terminal block is located under the machine cover. The terminal block must be connected respecting the notes below. The con-

nections shown below are standard. Other connections are given in the MCO manual of the on-machine control of the i-32V5 (see "USER AND 

INSTALLER CONFIGURATION TABLES"), according to the configurations adopted.

CAUTION: it is important to keep the high voltage cables separated from the very low voltage ones

TERMINAL

CONNECTION

TYPE

X-1

Connect the ground cable

Inlet for power supply 1-Ph/N/PE,230V, 50Hz

(only for sizes 06/08, SL08/10/12,SL12/14/16, 

SL16

N

Connect the neutral cable from the mains

L

Connect the phase cable from the mains

PE

Connect the earth cable

Input for power supply 3-Ph/N/PE, 400 Vac, 

50Hz.

(only for size 10T,12T,14T,16T,18T, SL12T,16T)

N

Connect the neutral cable from the mains

L1

Connect the phase cable L1 from the mains

L2

Connect the phase cable L2 from the mains

L3

Connect the phase cable L3 from the mains

X-5.2

Connection of modbus RTU for remote keyboard

Modbus communication

X-5.1

Connection of modbus RTU signal – for remote keyboard

X-4.1

Connection of modbus RTU earth reference for remote 

keyboard (GND)

X-12.1

Remote keyboard power supply (12V, 50Hz, 500mA)

Outpu for power supply 12Vac, 50Hz

X-12.2

Remote keyboard power supply (12V, 50Hz, 500mA)

X-17.1/X-17.2

DHW probe (SAN1)

Analogue or digital input

X-19.1/19.2

Plant remote probe (IMP1)

Analogue input

X-20.1/X-20.2

Double set point (Q4)

Analogue input

X-22.2

0-10V (+) signal input to modify set point

Analog input (ST10)

X-22.1

0-10V (-) signal input to modify set point

X-6.1/X-6.2

Plant heater (Rimp)

Output in single phase voltage 230Vac, 50Hz, 

5A resistive, 1A inductive.

Can be used in versions without KA

X-9.1/X-9.2

Exchanger heater (R2)

Output in single phase voltage 230Vac, 50Hz, 

5A resistive, 1A inductive.

Can be used in versions without KA

X-10.1/X-10.2

Base heater (R3)

Output in single phase voltage 230Vac, 50Hz, 

5A resistive, 1A inductive.

X-11.1/X-11.2

Domestic hot water valve outlet (VS1)

Changeover contact, single phase voltage 

230Vac, 50Hz, 5A resistive, 1A inductive.