Installation of Unit

Power Supply and Wiring

The unit is completely wired internally at the factory according to general rule of electrical technology, but local rules, if they are required, should be complied with.

1. Power supply

Power source must fulfill the following conditions:

The working voltage should be higher than 90% and lower than 110% of the rated voltage marked on the name plate.

Voltage

Power source voltage working voltage

Starting voltage

Starting point

Time

The starting voltage should be higher than 85% of the rated voltage marked on the name plate.

2. Wiring

After the confirmation of the above conditions, prepare the wiring as follows:

Use the power supply cord(Rubber insulation, type Ho7RNF approved by HAR or SAA) suitable for the product's electriccal capacity.

UNIT

VOLTS

Conductor

(BTU/h)

cross-sectional area

 

20k/28k/

H/P

450/750V

4.0mm2

30k/40k

C/O

450/750V

4.0mm2

44k/48k/

H/P

450/750V

5.5mm2

50k

C/O

450/750V

5.5mm2

80k

H/P

450/750V

8.0mm2

C/O

450/750V

8.0mm2

 

Provide a recognized circuit breaker as below between power source and unit. A disconnection device to adequately disconnect all supply lines must be fitted. (for service operations)

UNIT (BTU/h)

 

Circuit breaker capacity

 

 

 

 

 

 

20K/28K/

 

H/P

30A

 

30K/40K

 

C/O

30A

 

 

 

 

 

1 Phase

44K/48K/

 

H/P

40A

 

55K/60K

 

C/O

40A

 

 

 

 

 

 

44K/48K/

 

H/P

30A

3 Phase

50K/60K

 

C/O

30A

 

 

H/P

50A

 

80K

 

 

 

C/O

50A

 

 

 

 

 

 

 

 

The screws which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to which the unit is subjected during the course of transportation. Check them and make sure that they are all tightly fastened.

(If they are loose, it could give rise to burn- out of the wires.)

See to it that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate.

The following troubles would be caused by voltage drop-down.

Vibration of a magnetic switch, damage on the contact point there of, fuse breaking, disturbance to the normal function of a overload protection device.

*Separate main and heater power supply for Z model. (Do not connect together to the same power supply)

 

Unit (BTU/h)

Breaker

Conductor

 

 

 

 

Heater

20k/28k

30A

3.5mm2

Wiring

30k/40k

 

 

Spec.

44k/48k

40A

5.5mm2

 

50k/60k

 

 

 

80k

50A

8mm2

 

 

 

 

16Floor Standing type Air Conditioner

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LG Electronics 3828A20025V installation manual Power Supply and Wiring, Power supply