ENGLISH-40
Wiring work
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
f
In damp hard soil rather than loose sandy or gravel soil that has a higher grounding resistance .
f
f
Away from underground structures or facilities, such as gas pipes, water pipes, telephone lines and underground cables .
f
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
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) .
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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 .
Connection of the power supply and communication cable
Model
Description
No. of
wires
Max.
A
Thickness
Supply Scope
Inlet hole positions for power/
communication wires
AE***RNW*EG
1 Phase main
power
2 +
ground
22 .7A
4 .0mm2
↑
H05RN-F or
H07RN-F
Field supply (220-
240Vac, Input)
Communication
2
0 .1A
0 .75mm2
↑
H05RN-F or
H07RN-F
Field wiring
(7Vdc, data)
AE***RNW*GG
1 Phase main
power
2 +
ground
14 .0A
2 .5mm2
↑
H05RN-F or
H07RN-F
Field supply (220-
240Vac, Input)
3 Phase power
4 +
ground
8 .7A
2 .5mm2
↑
H07RN-F
Field supply (380-
415Vac, Input)
Communication
2
0 .1A
0 .75mm2
↑
H05RN-F or
H07RN-F
Field wiring
(7Vdc, data)
