Daikin EKHBX008BB3V3S Installation Manual

Contents

Daikin EKHBX008BB3V3S Installation Manual Manual pdf 47 page image

EKHBX008BB3V3SIndoor unit for air to water heat pump system4PW62597-1 – 10.2010Installation manual4410. MAINTENANCE AND SERVICEIn order to ensure optimal availability of the unit, a number of checksand inspections on the unit and the field wiring have to be carried outat regular intervals.This maintenance shall be carried out by the installer or serviceagent.10.1. Maintenance activitiesCautions before obtaining maintenance and serviceOpening the unitTo execute the maintenance activities as mentioned below, it is onlyrequired to remove the indoor unit cover. See "5.1. Opening theindoor unit" on page 10 for removing the front panel and removing theswitch box.Maintenance and serviceThe described checks must be executed at least once a year.1 Water pressureCheck if the water pressure is above 1 bar. If necessary addwater.2 Water filterClean the water filter.3 Water pressure relief valveCheck for correct operation of the pressure relief valve byturning the red knob on the valve counter-clockwise:■ If you do not hear a clacking sound, contact your local dealer.■ In case the water keeps running out of the unit, close boththe water inlet and outlet shut-off valves first and then contactyour local dealer.4 Pressure relief valve hoseCheck that the pressure relief valve hose is positionedappropriately to drain the water.If the (optional) drain pan kit is installed, make sure that thepressure relief valve hose end is positioned in the drain pan.5 Backup heater vessel insulation coverCheck that the backup heater insulation cover is fastened tightlyaround the backup heater vessel.6 Domestic hot water tank pressure relief valve (field supply)Applies only to installations with a domestic hot water tank.Check for correct operation of the pressure relief valve on thedomestic hot water tank.7 Domestic hot water tank booster heaterApplies only to installations with a domestic hot water tank (1).It is advisable to remove lime buildup on the booster heater toextend its life span, especially in regions with hard water. To doso, drain the domestic hot water tank, remove the booster heaterfrom the domestic hot water tank and immerse in a bucket (orsimilar) with lime-removing product for 24 hours.8 Indoor unit switch box■ Carry out a thorough visual inspection of the switch box andlook for obvious defects such as loose connections ordefective wiring.■ Check for correct operation of contactors K1M, K2M, K3M,K5M (applications with domestic hot water tank only) andK4M by use of an ohmmeter. All contacts of these contactorsmust be in open position.DANGER: ELECTRIC SHOCK■ Before carrying out any maintenance or repair activity,always switch off the circuit breaker on the supplypanel, remove the fuses or open the protectiondevices of the unit.■ Make sure that before starting any maintenance orrepair activity, also the power supply to the outdoorunit is switched off.■ Do not touch live parts for 10 minutes after the powersupply is turned off because of high voltage risk.■ The heater of the compressor may operate even instop mode.■ Please note that some sections of the electriccomponent box are hot.■ Make sure you do not touch a conductive section.■ Do not rinse the indoor unit. This may cause electricshocks or fire.■ When service panels are removed, live parts can beeasily touched by accident.Never leave the unit unattended during installation orservicing when service panel is removed.See "2. General safety precautions" on page 2.NOTICETouch a metal part by hand (such as the stop valve) inorder to eliminate static electricity and to protect the PCBbefore performing service.DANGER■ Do not touch water pipes during and immediately afteroperation as the pipes may be hot. Your hand maysuffer burns. To avoid injury, give the piping time toreturn to normal temperature or be sure to wearproper gloves.■ Do not touch the refrigerant pipes during andimmediately after operation as the refrigerant pipesmay be hot or cold, depending on the condition of therefrigerant flowing through the refrigerant piping,compressor, and other refrigerant cycle parts. Yourhands may suffer burns or frostbite if you touch therefrigerant pipes. To avoid injury, give the pipes time toreturn to normal temperature or, if you must touchthem, be sure to wear proper gloves.■ Do not touch the internal parts (pump, backup heater,etc.) during and immediately after operation.Your hands may suffer burns if you touch the internalparts. To avoid injury, give the internal parts time toreturn to normal temperature or, if you must touchthem, be sure to wear proper gloves.See "2. General safety precautions" on page 2.DANGER: ELECTRICAL SHOCKSee "2. General safety precautions" on page 2.WARNINGMake sure to always fix the cover with the screws whenremoving the switch box.DANGER: DO NOT TOUCH PIPING AND INTERNALPARTSSee "2. General safety precautions" on page 2.(1) Only applicable for tank with built-in electrical booster heater (EKHW*).WARNINGIf the supply cord is damaged, it must be replaced by themanufacturer, its service agent or similary qualifiedpersons to avoid a hazard.