INSTALLING THE OUTDOOR UNIT
Checking Correct Earthing
If the power distribution circuit does not have an earth or the earth does not comply with specifications, an earthing electrode must be installed. The corresponding accessories are not supplied with the air conditioner.
1Select an earthing electrode that complies with the specifications given in the illustration opposite.
2Determine a suitable location for the earthing electrode:
◆In damp hard soil rather than loose sandy or gravel soil that has a higher earthing resistance
◆Away from underground structures or facilities, such as gas pipes, water pipes, telephone lines and underground cables
◆At least two metres away from a lightening conductor earthing electrode and its cable
➢The earthing wire for the telephone line cannot be used to earth the air conditioner.
3Dig a hole of the size indicated in the illustration opposite, drive the earthing electrode into position and cover the top of the electrode with the excavated soil.
4Install a green/yellow insulated earthing wire (Ø1.6 mm, section 2 mm2 or greater):
◆If the earthing wire is too short, connect an extension lead, soldering the connection and wrapping it with insulating tape (do not bury the soldered connection)
◆Secure the earthing wire in position with staples
➢If the earthing electrode is installed in an area of heavy traffic, its wire must be connected securely.
5Carefully check the installation, by measuring the earthing resistance with an earthing resistance tester. If the resistance is above the required level, drive the earthing electrode deeper into the ground or increase the number of earthing electrodes.
Carbon | Steel |
|
plastic | core |
|
To earth- | ||
ing screw | ||
yellow wire, 2mm2 x 3.5 m |
| |
50 cm |
30 cm |
6Connect the earthing wire to the earthing screw on the air conditioner.