37
ENGLISH
Grounding work
If the power distribution circuit does not have a grounding or the grounding does not comply with specifications, a ground
rod must be installed.
The corresponding accessories are not supplied with the air conditioner.
1. Select a grounding rod that complies with the specifications given in the illustration.
Compressed ring terminal (Terminal M4)
PVC-insulated green/yellow wire
Copper wire
Carbon rod
2. Select a proper place for the grounding rod installation.
- In damp hard soil rather than loose sandy or gravel soil that has a higher grounding resistance.
- Away from underground structures or facilities, such as gas pipes, water pipes, telephone lines and underground
cables.
- At least two meters away from lightening(as in a storm) conductor.
50cm
30cm
t
The grounding wire for the telephone line cannot be used to ground the air conditioner.
CAUTION
3. Install a green/yellow coloured grounding wire :
- Refer to the ‘Wiring work’ for the specification of grounding wire.
- When the grounding wire is too short, extend the grounding wire but bind the connection part with insulation tape.
(Do not bury the connection).
- Secure the grounding wire in position with staples.
t
When the grounding rod is installed in a place where many people pass by, you must fix it firmly.
CAUTION
4. Carefully check the installation, by measuring the grounding resistance with a ground resistance tester.
- If the resistance is above required level, drive the grounding rod deeper into the ground or increase the number of
grounding rods.
5. Connect the grounding wire to the electrical component box inside of the outdoor unit.
