Tab. 3 - Standard electrical features

 

 

Evaporator fan

 

Condenser fan

 

Compressor

 

 

 

Heater

 

 

 

 

 

 

 

(2 x unit)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OA

FLA

LRA

Nom. power

OA

FLA

LRA

Nom. power

OA

FLA

LRA

Nom. power

OA

FLA

 

LRA

 

Nom. power

 

 

 

 

[W]

 

 

 

[W]

(*)

 

 

[W] (*)

 

 

 

 

 

[W]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PKS3

1

-

-

200

1.5

-

-

340

5.9

10

34

1370

-

13

 

-

 

3000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PKS4

1

-

-

200

1.5

-

-

340

7.1

12

36.5

1700

-

13

 

-

 

3000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(*)In the following conditions (ARI 520-78): Condensing temperature 54.4￿C, Ambient temp. 35￿C,

Evaporation temp. 7.2￿C, Sub-cooling temp.: 8.3￿C Overheating temp.: 11￿C

Tab. 4 - Protection switch and cable sizing

 

Protection switch with differential current I￿n = 0.3A

Cable sizing

 

 

 

 

 

V230/1/50Hz

230 Vac

24/48Vdc

 

 

 

 

PKS3-PKS4

20A

4 mm2

4 mm2

3.2- Emergency cooling kit (optional)

The emergency cooling kit consists of an inverter and a single-phase transformer installed inside the electric board.

Operating as shown in par. 3.1, supply power up to 48

(24)Vdc inside the electrical panel, by means of a screened cable with a minimum section as shown in

Tab. 4. Connect the possible ground line to the positive pole of the 48 Vdc power supply. Connect the cable screening to the metal cable clamp and perform the con￿ nections following the wiring diagram carefully.

Attention: Connect the poles correctly.

As regards the units with emergency supply through external Inverter, make the connections as specified in the electrical diagram.

4 - Start-up

4.1- First start-up (or after a long halt)

Before starting the air conditioner do check if the power supply voltage and frequency comply with those indi￿ cated on the identification plate of the unit.

After that, the conditioner can be started putting the automatic switch QS1 to ON position. On the units pro￿ vided with this switch also press the ON-OFF push but￿ ton on the Hiromatic interface.

Check the electrical input of all components and compare it with the data shown in the Tab. 3. Check that there are no active alarms; wait until the system reaches the standard operation and then make the following checks:

￿check that the fans are working correctly;

￿make sure that the temperature is guaranteed and the compressor and the heaters (optional) work when required;

￿only on versions provided with the Variex option (speed adjustment)make sure that the speed adjuster of the fan of the condensing section is correctly calibrated and controls the fan operation (see chapter 8).

4.2 - Start-up with low outside temperature

In case of low outside temperature (<0￿C), the unit start-up is helped by the delay time of the low pressure alarm activation, within which the pressures in the refrig￿ erating circuit reach the standard operation values.

4.3 - Starting and stopping

For the units provided with HIROMATIC interface:

￿start the unit by pressing the ON-OFF push button on the Hiromatic (confirmed by SYS.ON on the display);

￿stop the unit by pressing the ON-OFF push button on the Hiromatic (confirmed by SYS.OFF. on the display).

Note: turn the main switch QS1 and the QS2 Inverter switch off only if the unit is stopped for a long time.

For the units provided with the Microface control, you can switch on/off using the main switch QS1, which is ac￿ cessible by opening the hinged higher panel acting on quick lock system.

English

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272014 - 04.02.2000