14016. Maintenance GuideIn order to ensure safety and optimal performance of the Tank Unit, seasonal inspections on the Tank Unit, functionalcheck of RCCB/ELCB, field wiring and piping have to be carried out at regular intervals. This maintenance should becarried out by authorized dealer. Contact dealer for scheduled inspection.1 Charging and Discharging the WaterMake sure all the piping installations are properly done before carry out below steps.Charge the Water For domestic hot water tanka. Set the Domestic Hot Water Tank Discharge Valve to “CLOSE”.b. Set all Tap / Shower “OPEN”.c. Start filling water to the Domestic Hot Water Tank via Tube Connector. After 20~40min, water shouldflow out from Tap / Shower. Else, please contact your local authorized dealer.d. Check and make sure no water leaking at the tube connecting points. For Space Heating / Coolinga. Turn the plug on the Air Purge Valve outlet anticlockwise by one complete turn from fully closedposition.b. Set the Pressure Relief Valve level “DOWN”.c. Start filling water (with pressure more than 0.1 MPa (1 bar)) to the Space Heating / Cooling circuit viaTube Connector. Stop filling water if the free water flow through Pressure Relief Valve Drainage.d. Turn ON the Tank Unit and make sure Water Pump is running.e. Check and make sure no water leaking at the tube connecting points.Discharge the Water For domestic hot water tanka. Turn OFF power supply.b. Set the Domestic Hot Water Tank Discharge Valve to “OPEN”.c. Open Tap / Shower to allow air inlet.d. After discharge, set Hot Water Tank Discharge Valve to “CLOSE”.2 Check Water Pressure *(0.1 MPa = 1 bar)Water pressure should not lower than 0.05 MPa (with inspects the Water Pressure Gauge). If necessary addwater into Tank Unit (via Tube Connector).3 Check Pressure Relief Valveo Check for correct operation of Pressure Relief Valve by turning on the lever to become horizontal.o If you do not hear a clacking sound (due to water drainage), contact your local authorized dealer.o Push down the lever after finish checking.o In case the water keep on draining out from the Tank Unit, switch off the system, and then contact yourlocal authorized dealer.S O”NEPO“”ESOLC“Domestic Hot Water Tank Discharge Valve gAir purge valve cPlug (turnanticlockwise byone complete turn)Pressure reliefvalve dLeverTurn upPressure relief valve d