4.4 Testing of drain pipingAfter the piping work is finished, check if drainage flows smoothy.Add approximately IL of water gradually through the air dischargeoutlet.Method of adding water (see the figure below)10614 2inØ7513in,Ø65126inFresh air intake ( d) 65/2.6in)2 Unit: mm2Plasticwateringcan(tubeshouldbeabout100mm/39in long)Water-receiverWhen exlectric wiring work is finished, check drainage flow duringCOOL running, exlplained in "Test operation" on page 165 ELECTRIC WIRING WORKGeneral instructionsAll field wiring and components must be installed by a licensedelectrician and must comply with relevant European and nationalregulationsUse copper wire only.Follow the 'Wiring diagram' attached to the unit body to wire theoutdoor unit, indoor units and the remote controller.A circuit breaker capable of shutting down power supply to theentire system must be installedNote that the operation will restart automatically if the mainpower supply is turned off and then turned back on again.Be sure to ground the air conditioner.Do not connect the ground wire to gas pipes, water pipes,lightning rods, or telephone ground wiresGas pipes: might cause explosions or fire if gas leaks.Water pipes: no grounding effect if hard vinyl piping is usedTelephone ground wires or lightning rods: might causeabnormally highelectric potential in the ground duringlightning stormsThe specification of powerModel9K-18K 1 PhasePowerFrequency and volt208-240VCircuit breaker/Fuse(A)20/1613