Construction
E - 11
Main cable
Bus cable
Indoor unit
Indoor unit
Earth leakage
breaker
3. Points regarding electrical construction (indoor unit)
● The value within ( ) for the minimum cable size is the maximum
length (m).
● If the power to one indoor unit is not switched on, then other indoor units
will sound a warning. Therefore, indoor units should take the power from
one location that is separate from the outdoor units.
● When the indoor unit power supply is from a bus system, the power
cabling system should be grouped according to the refrigerant piping
system.
● The number of indoor units in one power supply system is limited by the
capacity of the cabling.
● Please note that the terminal board capacity and the maximum cable size
that can be connected are as shown in the table below.
2) Embedded in the ceiling high static pressure type and air processing unit with direct expansion coil.
a) Bus cable 10m respectively
b) Bus cabling 15m respectively
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