Daikin EWWD320, Installation, Operation And Maintenance Manual

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D-EIMWC00908-16EN - 21/52
Electrical installation
General specifications
CAUTION
All electrical connections to the machine must be carried out in compliance with laws and regulations in force.
All installation, management and maintenance activities must be carried out by qualified personnel.
Refer to the specific wiring diagram for the machine that you have purchased and which was sent with the unit. Should
the wiring diagram not appear on the machine or should it have been lost, please contact your nearest manufacturer
office, who will send you a copy.
CAUTION
Only use copper conductors. Failure to use copper conductors could result in overheating or corrosion at connection
points and could damage the unit.
To avoid interference, all control wires must be installed separately from the power cables. Use separate electrical
conduits for this purpose.
CAUTION
Before any installation and connection work, the system must be switched off and secured.
The presence of capacitors within the VFD ensures there is voltage downstream of the inverters, even if the
disconnecting switch is open, for several minutes. After switching off the unit, the intermediate circuit capacitors of the
inverter are still charged with high voltage for a short period of time. The unit can be worked on again after it has been
switched of for 10 minutes. Please consult the compressor manual for further details.
CAUTION
The units of the series are provided with non-linear high power electrical components (compressor VFD, which introduce
higher harmonics) can cause considerable dispersion to earth, of about 2 A.
The electricity supply system protection must take the above values into account.
Table 2 - Electrical data
320FZ 430FZ 520FZ 640FZ 860FZ C10FZ
Power Supply Phase --- 3 3 3 3 3 3
Frequency Hz 50 50 50 50 50 50
Voltage V 400 400 400 400 400 400
Voltage Tolerance Minimum % -10% -10% -10% -10% -10% -10%
Maximum % +10% +10% +10% +10% +10% +10%
Unit Maximum starting current A 135 231 176 270 420 352
Nominal running current
(1)
A 104 142 168 207 285 335
Maximum running current
(2)
A 135 210 176 270 420 352
Maximum current for wires sizing A 149 231 194 297 462 385
Compressor Phase No. 3 3 3 3 3 3
Voltage V 400 400 400 400 400 400
Voltage Tolerance Minimum % -10% -10% -10% -10% -10% -10%
Maximum % +10% +10% +10% +10% +10% +10%
Maximum running current
(2)
A 135 210 176 135+135 210+210 176+176
Starting method --- VFD
Notes (1) Unit absorbed current at the following nominal conditions: evaporator water temperature 12/7°C; condenser water temperature 30/35°C, unit at full load
operation with maximum capacity
Notes (2) Unit maximum absorbed current regardless operating conditions