15
EN
G
LIS
H
Connecting the cable
Connecting the power terminal
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Connect the cables to the terminal board using the compressed ring terminal.
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Connect the rated cables only.
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Connect using a wrench which is able to apply the rated torque to the screws.
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If the terminal is loose, fire may occur caused by arc. If the terminal is connected too firmly, the terminal may be
damaged.
Tightening Torque (kgf.cm)
M4
12.0~14.7
M5
24.4~29.8
Installing the earth wire
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Earthing must be done by your installation specialist for your safety.
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Use the earth wire by referring to the specification of the electric cable for the outdoor unit.
Earthing the power cable
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The standard of earthing may vary according to the rated voltage and installation place of the Air to Water Heat
Pump.
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Earth the power cable according to the following.
Installation place
Power condition
High humidity
Average humidity
Low humidity
Electrical potential of lower than 150V
Perform the earthing work
3.
Note 1)
Perform the earthing work 2 if
possible for your safety.
Note 2)
Electrical potential of higher than 150V
Must perform the earthing work 3.
Note 1)
(In case of installing circuit breaker)
* Note 1) Earthing work 3
- Earthing must be done by your installation specialist.
- Check if the earthing resistance is lower than 100Ω. When installing a circuit breaker that can cut the electric
circuit in case of a short circuit, the allowable earthing resistance can be 30~500Ω.
* Note 2) Earthing at dry place
- The earthing resistance should be lower than 100Ω. (Even in worst case it should be lower than 250Ω.)
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When using the terminal for earthing only
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When using earthing of the switchboard
Earth
terminal
Distribution
Board
