6 InstallationInstaller reference guide18RZAG35~60A2V1BR32 split series4P540076-1A – 2018.116.7 Connecting the electrical wiring6.7.1 About connecting the electrical wiringBefore connecting the electrical wiringMake sure:▪ The refrigerant piping is connected and checked▪ The water piping is connectedTypical workflowConnecting the electrical wiring typically consists of the followingstages:1 Making sure the power supply system complies with theelectrical specifications of the units.2 Connecting the electrical wiring to the outdoor unit.3 Connecting the electrical wiring to the indoor unit.4 Connecting the main power supply.6.7.2 Precautions when connecting theelectrical wiringINFORMATIONAlso read the precautions and requirements in thefollowing chapters:▪ General safety precautions▪ PreparationDANGER: RISK OF ELECTROCUTIONWARNINGALWAYS use multicore cable for power supply cables.WARNINGUse an all-pole disconnection type breaker with at least3 mm between the contact point gaps that provide fulldisconnection under overvoltage category III.WARNINGIf the supply cord is damaged, it MUST be replaced by themanufacturer, its service agent or similarly qualifiedpersons in order to avoid a hazard.WARNINGDo NOT connect the power supply to the indoor unit. Thiscould result in electrical shock or fire.WARNING▪ Do NOT use locally purchased electrical parts insidethe product.▪ Do NOT branch the power supply for the drain pump,etc. from the terminal block. This could result inelectrical shock or fire.WARNINGKeep the interconnection wiring away from copper pipeswithout thermal insulation as such pipes will be very hot.DANGER: RISK OF ELECTROCUTIONAll electrical parts (including thermistors) are powered bythe power supply. Do not touch them with bare hands.DANGER: RISK OF ELECTROCUTIONDisconnect the power supply for more than 10 minutes,and measure the voltage at the terminals of main circuitcapacitors or electrical components before servicing. Thevoltage MUST be less than 50 V DC before you can touchelectrical components. For the location of the terminals,see the wiring diagram.bcDC P1+DC N1-adegfa Multimeter (DC voltage range)b S80 – reversing solenoid valve lead wirec S20 – electronic expansion valve lead wired S40 – thermal overload relay lead wiree S90 – thermistor lead wiref LEDg S70 – fan motor lead wire6.7.3 Guidelines when connecting the electricalwiringKeep the following in mind:▪ If stranded conductor wires are used, install a round crimp-styleterminal on the end of the wire. Place the round crimp-styleterminal on the wire up to the covered part and fasten the terminalwith the appropriate tool.b aa Stranded conductor wireb Round crimp-style terminal▪ Use the following methods for installing wires:Wire type Installation methodSingle-core wirec bcaaA AA´A´a Curled single-core wireb Screwc Flat washerStranded conductorwire with roundcrimp-style terminalc b ba caBBa Terminalb Screwc Flat washerO AllowedX NOT allowed