installing the unit _39
ENGLISH
Grounding work
• Grounding must be done by a qualified installer for your safety.
Grounding the power cable
• The standard of grounding may vary according to the rated voltage and installation place of
the air conditioner.
• Ground the power cable according to the following.
Performing the grounding work
• Use the grounding wire by referring to the specification of the electric cable for the outdoor
unit.
High humidity
Average humidity Low humidity
Electrical
potential of lower than 150V
Perform the
grounding work 3.
Note 1)
Perform the grounding
work 2 if possible for your
safety.
Note 2)
Electrical
potential of higher than
150V
Must perform the grounding work 3.
Note 1)
(In case of installing circuit breaker)
Power
condition
Installation
place
Note 1) Grounding work 3
Grounding must be done by your installation specialist.
Check if the grounding resistance is lower than 100Ω.
When installing a circuit breaker that can cut the electric circuit in case of a short
circuit, the allowable grounding resistance can be 30~500
Ω
.
Note 2) Grounding at dry place
The grounding resistance is should be lower than 100
Ω
.
(It should not be higher than 250
Ω
)
When using the terminal for grounding
only
Grounding terminal
When using grounding of the switch
board
Switch board
DVM PLUS3_IM_E_31180-1.indd 39 2009-10-16 ｿﾀﾈﾄ 2:10:36
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