Fujitsu UTY-XDZX Manual de instalação - Página 5

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Do not connect the earth (ground) cable to a gas pipe, water pipe, lightning rod, or a telephone earth (ground) cable.

Improper earthing (grounding) may cause electric shock.

Please remove the knockout of cover parts for the part of connecting the wire.

Please use the appropriate tool and handle properly so that the wire may not be scratched. Make sure to be careful not to

damage other parts or objects with the removed parts. And make sure to be careful not to leave the removed parts, and be

sure to return them to their original position.

6.1 Electrical requirement

Input Voltage (Rating): 230V / 50Hz

・The module must be powered from the outdoor unit terminals designed for connection of this unit. Warranty is void if

connected to other power source.

Make sure proper interlocks are made so that the unit never operates when there is not adequate air or water flow

through the AHU heat exchanger.

・Select the power cable type and size in accordance with relevant local and national regulations.

・Specifications for local wiring power cord and branch wiring are in compliance with local code.

・Maximum wire length : Set a length so that the voltage drop is less than 2%. Increase the wire diameter when the wire

length is long.

6.2 Connection to outdoor unit

Use suitable cable as specified for the outdoor unit (3*1.5mm^2+GND is recommended. 3*2.5mm^2+GND is maximum).

Use confirmed cable with type 60245 IEC57 is recommended. Make sure to terminate ground properly.

6.3 Connection of wiring

Use suitable isolated wires of (0,25-0,5mm^2). In noisy environments or if length is exceeding 2m a twisted pair cable

(0,25-0,5mm^2) with shield is recommended. Especially if used with high impedance inputs.

The wire connection should be separate from the power cable line.

6.3.1 External inputs

The unit features a galvanically isolated internal power source.

The required control signals are: Enable, Heat/Cool, and Demand 0-10VDC for 0 - 100% compressor demand.

All these signals must be either potential free or refer to a common potential.

Input name

Cool/Heat

Enable

Demand

(0-10VDC for 0-100%)

Temperature sensor

・Cool/Heat, Enable input

・Temperature sensor input

CAUTION

Command

Short: Heating mode is set.

Open: Cooling mode is set.

Short: Demand input is available

Open: Demand input is not available. Compressor does not work.

0V: Compressor off

～10V: Prefer the following description.

Page 5 of 8

・Demand input

Terminal No.

6—7

5—7

3, 4

1, 2