Daikin VRV REYQ96MTJU Design, Installation & Testing Instruction page 60

Installation
Power Supply 1. Choosing a circuit breaker
The power supply work must conform to local regulations. In Japan, the relevant regulations are the
(Cabling of Main
MITI ordinance determining technical standards for electrical equipment, and the Internal Wining
Power Supply)
Provisions.
a) The indoor unit circuit breakers
Branch circuit facility (Internal wiring provisions
305-2)
The motors must be set up with a dedicated branch
circuit for each unit. However, where they
correspond to any of the following situations, this
limitation does not apply.
Note: It is recommended that the total rated
capacity of the motors set up in a 15A branch circuit
or a 20A circuit breaker branch circuit should be no
more than 2.2kW.
When using high static pressure indoor units the fan motors must have a large capacity. Single
phase 220~240V branch circuits are therefore required for each indoor unit.
Example: Up to 10 × 2.5HP indoor units or 5 × 5HP indoor units can be wired together.
b) The outdoor unit circuit breaker
Calculation of load (Refer to local regulation.)
With respect to the calculation of load for motors with special applications such as elevator, air
conditioner and refrigerator motors, not only must the rated current be shown on the name plate of
the said motor or piece of apparatus but it must also included all special characteristics or
applications.
Note: The rated current for package air conditioners which use special purpose built-in compressor
motors in their compressors in 1.2 times the operating current shown on the name plate.
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In accordance with the provisions for internal wiring (JEAC8001-1986), power may be supplied
by means of crossover lines between the indoor units in a single system branch circuit.
When used in a 15A branch circuit of a 20A
circuit breaker branch circuit
A separate circuit breaker must be fitted for each unit.
The motors incorporated into air conditioning system compressors are treated as special motors
under the internal wiring provisions. The values which apply to normal motors are thus
somewhat variance with those which apply to such compressor motors. You are recommended
to adhere strictly to the procedures laid down in the technical materials included in, for example,
the system design manuals.
Si39-406
General Information