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RXYMQ36PVJURXYMQ48PVJU VRVIII-S System air conditioner Installation manualCONTENTS1. SAFETY CONSIDERATIONS.................................................. 12. INTRODUCTION...................................................................... 22-1. Combination...................................................................... 32-2. Standard operation limit .................................................... 32-3. Spec list ............................................................................ 32-4. Electrical properties .......................................................... 32-5. Standard supplied accessories ......................................... 32-6. Option accessory .............................................................. 33. BEFORE <strong>INSTALLATION</strong>........................................................ 34. SELECTING <strong>INSTALLATION</strong> SITE ......................................... 45. PRECAUTIONS ON <strong>INSTALLATION</strong> ...................................... 56. FIELD WIRING......................................................................... 66-1. Wiring connection example for whole system................... 66-2. How to lay the power supply wiring andtransmission wiring............................................................ 66-3. How to connect the power supply wiring........................... 76-4. Transmission wiring connection procedure....................... 77. PRECAUTIONS ON REFRIGERANT PIPING......................... 77-1. Installation tools ................................................................ 77-2. Selecting piping material................................................... 87-3. Protection against contamination when installing pipes ........ 87-4. Pipe connection ................................................................ 87-5. Connecting the refrigerant piping...................................... 87-6. Heat insulation of piping.................................................... 97-7. Example of connection.................................................... 107-8. Air tight test and vacuum drying...................................... 118. ADDITIONAL REFRIGERANT CHARGE .............................. 128-1. Before adding refrigerant ................................................ 128-2. Checking the refrigerant tank.......................................... 128-3. Adding refrigerant ........................................................... 129. POST-WORK CHECKS......................................................... 1210. TEST RUN ............................................................................. 1210-1.Power On–Check Operation.......................................... 1210-2.Temperature control operation checklist........................ 1311. CAUTION FOR REFRIGERANT LEAKS............................... 141. SAFETY CONSIDERATIONSRead these “SAFETY CONSIDERATIONS for Installation” carefullybefore installing air conditioning equipment. After completing the installation,make sure that the unit operates properly during the startup operation.Instruct the customer on how to operate and maintain the unit. Informcustomers that they should store this Installation Manual with the OperationManual for future reference.Always use a licensed installer or contractor to install this product.Improper installation can result in water or refrigerant leakage, electricalshock, fire, or explosion.Meanings of DANGER, WARNING, CAUTION, and NOTE Symbols:DANGER.......Indicates an imminently hazardous situation which,if not avoided, will result in death or serious injury.WARNING.....Indicates a potentially hazardous situation which, ifnot avoided, could result in death or serious injury.CAUTION ......Indicates a potentially hazardous situation which, ifnot avoided, may result in minor or moderate injury.It may also be used to alert against unsafe practices.NOTE.............Indicates situations that may result in equipment orproperty-damage accidents only.DANGER• Refrigerant gas is heavier than air and replaces oxygen. A massiveleak can lead to oxygen depletion, especially in basements,and an asphyxiation hazard could occur leading toserious injury or death.• Do not ground units to water pipes, gas pipes, telephone wires,or lightning rods as incomplete grounding can cause a severeshock hazard resulting in severe injury or death. Additionally,grounding to gas pipes could cause a gas leak and potentialexplosion causing severe injury or death.• If refrigerant gas leaks during installation, ventilate the areaimmediately. Refrigerant gas may produce toxic gas if it comesin contact with fire. Exposure to this gas could cause severeinjury or death.• After completing the installation work, check that the refrigerantgas does not leak throughout the system.• Do not install unit in an area where flammable materials arepresent due to risk of explosions that can cause serious injuryor death.• Safely dispose all packing and transportation materials inaccordance with federal/state/local laws or ordinances. Packingmaterials such as nails and other metal or wood parts, includingplastic packing materials used for transportation may causeinjuries or death by suffocation.WARNING• Only qualified personnel must carry out the installation work.Installation must be done in accordance with this installationmanual. Improper installation may result in water leakage, electricshock, or fire.• When installing the unit in a small room, take measures to keepthe refrigerant concentration from exceeding allowable safetylimits. Excessive refrigerant leaks, in the event of an accident ina closed ambient space, can lead to oxygen deficiency.• Use only specified accessories and parts for installation work.Failure to use specified parts may result in water leakage, electricshocks, fire, or the unit falling.• Install the air conditioner on a foundation strong enough that itcan withstand the weight of the unit. A foundation of insufficientstrength may result in the unit falling and causing injuries.• Take into account strong winds, typhoons, or earthquakeswhen installing. Improper installation may result in the unit fallingand causing accidents.• Make sure that a separate power supply circuit is provided forthis unit and that all electrical work is carried out by qualifiedpersonnel according to local state, and national regulations. Aninsufficient power supply capacity or improper electrical constructionmay lead to electric shocks or fire.• Make sure that all wiring is secured, that specified wires areused, and that no external forces act on the terminal connectionsor wires. Improper connections or installation may resultin fire.• When wiring, position the wires so that the terminal box lid canbe securely fastened. Improper positioning of the terminal boxlid may result in electric shocks, fire, or the terminals overheating.• Before touching electrical parts, turn off the unit.• Be sure to install a ground fault circuit interrupter if one is notalready available. This helps prevent electrical shocks or fire.1 English
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