79
INSTALLATION INSTRUCTION SUPPLEMENT
The outdoor unit to be connected is
CU-2Z35/2Z41/2Z50/3Z52/3Z68/4Z68/4Z80/5Z90***.
Check this manual for the following contents before performing the installation work.
4. ELECTRICAL WIRING
5. HOW TO PROCESS TUBING
9. TEST RUN
4. ELECTRICAL WIRING
4-1. General Precautions on Wiring
(1) Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry
out the wiring closely following the wiring diagram under Section 4-4.
WARNING
(2) This equipment is strongly recommended to be installed with Earth Leakage Circuit
Breaker (ELCB) or Residual Current Device (RCD). Otherwise, it may cause electrical
shock and fire in case of equipment breakdown or insulation breakdown.
The ELCB must be incorporated in the fixed wiring in accordance with the wiring
regulations. The ELCB must be an approved circuit capacity, having a contact
separation in all poles.
The ELCB or RCD suitable for use with inverters, resistant to high frequency noise, is
most suitable. The ELCB’s or RCD’s intended for protection to include high frequency
currents are unnecessary and should be avoided, as potentially causing nuisance
tripping, in this application.
(3) To prevent possible hazards from insulation failure, the unit must be grounded.
(4) Each wiring connection must be done in accordance with the wiring system diagram. Wrong
wiring may cause the unit to misoperate or become damaged.
(5) Do not allow wiring to touch the refrigerant tubing, compressor, or any moving parts of the
fan.
(6) Unauthorized changes in the internal wiring can be very dangerous. The manufacturer will
accept no responsibility for any damage or misoperation that occurs as a result of such
unauthorized changes.
(7) Regulations on wire diameters differ from locality to locality. For field wiring rules, please
refer to your LOCAL ELECTRICAL CODES before beginning.
You must ensure that installation complies with all relevant rules and regulations.
CAUTION
Check local electrical codes and regulations before wiring. Also, check any specified
instruction or limitations.
01_330918_EU_Eng.indb 79 2021/9/9 11:27:07
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