ENGLISH-41
02
INST
ALLA
TION
Checking correct grounding
If the power distribution circuit does not have a grounding or the grounding does not comply with specifications, an
grounding electrode must be installed. The corresponding accessories are not supplied with the Air to Water Heat pump.
1. Select an grounding electrode that complies with the specifications given in the illustration.
Terminal M4
PVC-insulated green/
yellow wire
To grounding
screw
Steel core
Carbon
plastic
50 cm
30 cm
2. Connect the flexible hose to the flexible hose port.
f
In damp hard soil rather than loose sandy or gravel soil that has a higher grounding resistance.
f
Away from underground structures or facilities, such as gas pipes, water pipes, telephone lines and underground cables.
f
At least two metres away from a lightening conductor grounding electrode and its cable.
• The grounding wire for the telephone line cannot be used to ground the Air to Water Heat pump.
NOTE
3. Finish wrapping insulating tape around the rest of the pipes leading to the outdoor unit.
4. Install a green/yellow coloured grounding wire :
f
If the grounding wire is too short, connect an extension lead, in a mechanical way and wrapping it with insulating tape
(do not bury the connection).
f
Secure the grounding wire in position with staples.
• If the grounding electrode is installed in an area of heavy traffic, its wire must be connected securely.
NOTE
5. Carefully check the installation, by measuring the grounding resistance with a ground resistance tester. If the resistance is
above required level, drive the electrode deeper into the ground or increase the number of grounding electrodes.
6. Connect the grounding wire to the electrical component box inside of the outdoor unit.
Setting the option switch and function of the keys
Testing operations
1. Check the power supply between the outdoor unit and the auxiliary circuit breaker.
• 1 phase power supply : L, N
• 3 phases power supply : R,S,T,N
2. Check that you have connected the power and communication cables correctly.(If the power cable and communication
cables one mixed up or connected incorrectly, the PCB will be damaged.)
