Daikin ERLQ004CA Installer's Reference Manual

Contents

7 InstallationInstaller reference guide40ERLQ004~008CA + EHBH/X04+08CBDaikin Altherma – Low temperature split4P384972-1B – 2017.047.8.6 To insulate the water pipingThe piping in the complete water circuit MUST be insulated toprevent condensation during cooling operation and reduction of theheating and cooling capacity.If the temperature is higher than 30°C and the humidity is higherthan RH 80%, the thickness of the insulation materials should be atleast 20 mm to prevent condensation on the surface of theinsulation.7.9 Connecting the electrical wiring7.9.1 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 heat pump.2 Connecting the electrical wiring to the outdoor unit.3 Connecting the electrical wiring to the indoor unit.4 Connecting the main power supply.5 Connecting the backup heater power supply.6 Connecting the user interface.7 Connecting the shut–off valves.8 Connecting the electrical meters.9 Connecting the domestic hot water pump.10 Connecting the alarm output.11 Connecting the space cooling/heating ON/OFF output.12 Connecting the changeover to an external heat source.13 Connecting the power consumption digital inputs.14 Connecting the safety thermostat.7.9.2 About electrical complianceOnly for indoor unitsSee "7.9.8 To connect the backup heater power supply" onpage 42.7.9.3 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.7.9.4 Guidelines when connecting the electricalwiringKeep the following in mind:▪ If stranded conductor wires are being used, install a round crimp-style terminal on the tip. Place the round crimp-style terminal onthe wire up to the covered part and fasten the terminal with theappropriate 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 washerTightening torquesItem Tightening torque (N•m)M4 (X1M) 1.2~1.5M4 (earth)7.9.5 To connect the electrical wiring on theoutdoor unit1 Remove the 2 switch box cover screws.2 Remove the switch box cover.2×123 Strip insulation (20 mm) from the wires.a ba Strip wire end to this pointb Excessive strip length may cause electrical shock orleakage.4 Open the wire clamp.5 Connect the interconnection cable and power supply as follows: