EC fan unit 1.2kW 315

The 1.2kW EC fan unit with a 315mm diameter impeller is one of the basic components of VTS air handling units.

Key features

• The 1.2kW EC fan unit with a 315mm diameter impeller is one of the basic components of VTS air handling units.
• By using the appropriate fan unit, you can achieve the desired airflow in your unit.
• EC fan units are energy-efficient, quiet, and adaptable to various applications thanks to a variety of control methods, such as Modbus RTU or 0-10V.
• For more information about a specific fan unit, refer to its documentation available in the "Downloads" section. There you will find information on dimensions and connection of the unit, among other things.

Product description

The 1.2kW EC fan unit with a 315mm diameter impeller is one of the basic components of VTS air handling units. By using the appropriate fan unit, you can achieve the desired airflow in your unit. EC fan units are energy-efficient, quiet, and adaptable to various applications thanks to a variety of control methods, such as Modbus RTU or 0-10V. For more information about a specific fan unit, refer to its documentation available in the "Downloads" section. There you will find information on dimensions and connection of the unit, among other things.

EC drive configuration – important information

The motor controllers are configured by default to operate using a 0–10 V signal.

To adapt a new EC drive, ordered as a spare part, to work with a given air handling unit with VTS automation, the following are required:

• a USB-RS485 converter (e.g. Ultima TRB-0611 or another based on the FTDI chipset)
• a power supply cable for the motor (L+N+PE for 1-phase drives; L1+L2+L3+PE for 3-phase drives)
• Modbus master software (e.g. Modbus Poll)

Note! Factory-assembled VTS AHUs are supplied with drives ready for operation. The following steps apply only to drives ordered as spare parts and to drives in AHUs assembled on site.

After connecting the motor to the power supply and the converter, in the Modbus Poll software, establish a connection with the motor in accordance with the default parameters (address 1, baud rate 9600, no parity check, 1 stop bit), and then:

• Set Holding Register 5 to 9788 (password enabling parameter changes)
• Set HR 6 to 2 (operating mode = Modbus)
• Set HR 8 to 0 (response to communication loss = stop)
• Set HR 7 to the value corresponding to the motor’s address in the AHU – after this change, re-establish the connection with the motor at the selected address using the following parameters: baud rate 9600, no parity check, 1 stop bit
• Set HR 5 to 10000 (password to save the changes)

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