English 188. ELECTRIC WIRING WORK8-1 GENERAL INSTRUCTIONS• Make certain that all electric wiring work is carried out by qualified personnel according to the applicablelegislation and this installation manual, using a separate circuit. Insufficient capacity of the power supply cir-cuit or improper electrical construction may lead to electric shocks or a fire.• Make sure to install an earth leakage breaker in accordance with applicable legislation. Failure to do so maycause electrical shock and a fire.• Do not turn on the power supply (of the indoor unit) until all the installation work is completed.• Make sure to earth the air conditioner.Earthing resistance should be according to applicable legislation.• Do not connect the earth wiring to gas or water piping, lightning conductor or telephone earth wiring.• Gas piping ..... Ignition or explosion may occur if the gas leaks.• Water piping ..... Hard vinyl tubes are not effective earths.• Lightning conductor or telephone earth wiring ......Electric potential may rise abnormally if struck by alightning bolt.• For electric wiring work, refer to also the “WIRING DIAGRAM” attached to the control box lid.• Never connect the power supply wiring to the terminal block for remote controller wiring, or otherwise theentire system may be damaged.• Carry out installation and wiring of the remote controller according to the “installation manual” attached tothe remote controller.• Do not touch the Printed Circuit Board assy during the wiring work. Otherwise, it may cause damage.8-2 SPECIFICATIONS FOR FIELD WIRINGFor the wiring of outdoor units, refer to the installation manual attached to the outdoor units.• Remote controller and transmission wiring are field supply. (Refer to Table 3)Table 3* This will be the total extended length in the system when doing group control.Wiring specifications are shown on the condition that the wiring has a voltage drop of 2%.1. It shows the case when conduit piping are used. When the conduit piping are not used, use H07RN-F.2. Sheathed vinyl cord or cable (insulation thickness: 1mm or more)9. HOW TO CONNECT WIRINGS AND WIRING EXAMPLEWiring connection method〈〈Caution for wiring〉〉• The indoor units in the same system can be connected to the power supply from one branch switch. How-ever, selection of branch switch, branch over current circuit breaker and wiring size must be according toapplicable legislation.• For connection to the terminal block, use ring type crimp style terminals with insulation sleeve or treat thewiring with insulation.Wire Size (mm2) LengthTransmission wiring H05VV-U4G(NOTE 1) 2.5 –Remote controller wiring Vinyl cord with sheath or cable (2 wire)(NOTE 2) 0.75 - 1.25 Max. 500m*Insulation sleeveRing type crimp style terminalsWiring