DUCTLESS MINI SPLIT SYSTEM AIR CONDITIONER / HEAT PUMPWAS / WYS SeriesWAS: Cooling Only VersionWYS: Cooling and Heating VersionInverter and Inverter ModelsFor 9,000-36,000 BTU/hr SystemsWiFi ReadyInstallationManualCS78421-548-754IMPORTANT NOTICE:Please read this manual car efully before installingor operating your new air conditioning system.Be sure to save this manual for future reference.
Table of ContentsInstallation Manual0 Safety Precautions.41 Accessories.62 Indoor Unit Installation Summary.83 Unit Components.104 Indoor Unit Installation.111. Select installation location.112. Attach mounting plate to wall.123. Drill wall hole for connective piping.124. Prepare refrigerant piping.145. Connect drain hose.156. Connect signal cable.177. Wrap piping and cables.188. Connect indoor power wire. 189. Mount indoor unit. 185 Outdoor Unit Installation.201. Select installation location.202. Install drain joint. 213. Anchor outdoor unit. 224. Connect signal and power cables.23
6 Refrigerant Piping Connection.25A. Note on Pipe Length. 25B. Connection Instructions –Refrigerant Piping. 251. Cut pipe. 252. Remove burrs. 263. Flare pipe ends. 264. Connect pipes. 27MCMC7 Air Evacuation.291. Evacuation Instructions. 292. Note on Adding Refrigerant.308 Electrical and Gas Leak Checks.319 Test Run.3210 European Disposal Guidelines.34
Safety PrecautionsRead and Understand Safety Precautions Prior to InstallationImproper installation due to negligence of instructions may result in serious damage or injury.The magnitude of potential damages or injuries is classified as either a WARNING or a CAUTION.This symbol indicates that ignoring the related instructions may cause death,or serious injury.WARNINGThis symbol indicates that ignoring the related instructions may cause moderateinjury to nearby persons, and/or damage to your appliance or other property.CAUTIONThis symbol indicates that you must never perform the action shown.WARNINGDo not power the system using an extension cable or smaller than specified gauge wiring.Do not share the electrical circuit with other appliances. Improper or insufficient power supplycan cause undesirable operation, fire, or electrical shock.When connecting refrigerant piping, do not let any substances or gases other than the specifiedrefrigerant enter the unit. The presence of other gases or substances will lower the unit’s capacity,and can cause abnormally high pressure in the refrigeration cycle. This can also cause explosion andinjury , as well as permament equipment failure. Remember : No dust, humidity or air should be allowed to enter.Do not allow children to play with or around the air conditioner. Children near the unit must besupervised at all times.1. Installation must be performed by a licensed and trained technician. Defective installation cancause water leakage, electrical shock, or fire. The usage of proper tools is a requirement.2. Installation must be performed according to the installation instructions. Improper installation cancause water leakage, undesired performance, electrical shock, or fire.(In North America, installation must be performed in accordance with the requirements of NEC andCEC, by authorized personnel only.)3. Contact a qualified and licensed HVAC technician for any repairs or maintenance of this unit.4. Only use the included accessories, parts, and specified items for installation. Using non-standardparts can cause water leakage, electrical shock, fire, and can cause total unit failure.5. Install the unit on top of a firm structure that can fully support it’s weight. If the chosen location cannotsupport the unit’s weight, or the installation is not done properly, the unit may fall and causeserious injury and damage. Page 4
WARNING6. For all electrical work, follow all local and national wiring standards, regulations, and especially thisInstallation Manual. You must use an independent circuit and a dedicated breaker to supply power.Do not connect other appliances to the same circuit. Insufficient electrical capacity or defects inelectrical work can cause electrical shock or fire.7. For all electrical work, use the specified cables. Connect cables tightly, and clamp them securely toprevent external forces from damaging the terminals. Improper electrical connections can overheatand cause fire, and may also cause shock.8. All wiring must be properly arranged to ensure that the control board cover can close properly. Ifthe control board cover is not closed properly, it can lead to corrosion and cause the connectionpoints on the terminal to heat up, catch fire, or cause electrical shock.9. In certain functional environments, such as kitchens, server rooms, etc., the use of specially designedair-conditioning units is highly recommended. This is intended as a comfort cooling system.10. If the supply cord is damaged, it must be replaced by a certified service agent or similarly qualifiedtechnicians, in order to avoid a hazard.11. This appliance can be used by children aged 8 years and above, as well as persons with reducedphysical, sensory, or mental capabilities, or lack of experience or knowledge, if they have been givensupervision or instruction concerning use of the appliance in a safe way, and understand the hazardsinvolved. Children shall not play with or near the appliance. Cleaning and user maintenance shall not bedone or attempted by children or untrained personnel without proper supervision.CAUTIONFor units that have an auxiliary electric heater, do not install the unit within 1 meter (3 feet) ofany combustible materials.Do not install the unit in a location that may be exposed to combustible gas leaks. If combustiblegas accumulates around the unit, it may cause fire.Do not operate your air conditioner in a highly humid space, such as bathrooms or laundry rooms.Exposure to high humidity or water can cause electrical components to short circuit.1. The product must be properly grounded at the time of installation, else electrical shock may occur.2. Install drainage piping according to the instructions in this manual. Improper drainage may causewater damage to your home and property.Note about Fluorinated Gasses1. This air-conditioning unit contains fluorinated gasses. For specific information on the type of gas2.3.4.5.and the amount, please refer to the relevant label on the unit itself.Installation, service, maintenance, and repair of this unit must be performed by a certified HVACtechnician.Product uninstallation and recycling must be performed by a certified HVAC technician.If the system has a leak-detection feature installed, it must be checked for leaks at least every 12months.When the unit is being checked for leaks, proper logging and record-keeping of all checks is stronglyrecommended. Page 5
1AccessoriesThe air conditioning system comes with the following accessories. Use all of the installationparts and accessories to install the air conditioner. Improper installation may cause theequipment to fail, or result in water leakage, electrical shock, or fire.NameAppearanceQuantityMounting plate1Clip anchor5Mounting plate fixingscrew ST3.9 X 255Remote controller1Fixing screw for remotecontroller holder ST2.9 x 102OptionalPartsRemote controller holder1Dry battery AAA.LR03SealDrain joint Page 6 21(for cooling & heatingmodels only)(For the Outdoor Unit)
ShapeNameQuantitySPLIT-TYPE ROOM AIR CONDITIONEROwner’s ManualOwner’s manual1CS78421-548-754IMPORTANT NOTE:Read this manual carefully before installingor operating your new air conditioningunit. Make sure to save this manual forfuture reference.SPLIT-TYPE ROOM AIR CONDITIONERInstallation ManualInstallation manual1CS78421-548-754IMPORTANT NOTE:Read this manual carefully before installingor operating your new air conditioningunit. Make sure to save this manual forfuture reference.Remote controllermanualAIR CONDI TIONE RREMOTE CONTROL LER MANUAL1IMPORTANT NOTE:Read this manual carefully before installingor operating your new air conditioningunit. Make sure to save this manual forfuture reference.Connecting pipeassembly(depending on capacity)Liquid sideΦ 6.35( 1/4 i n)Φ9.52( 3/8in)Φ9.52( 3/8in)Gas sideΦ12.7( 1/2in)Parts sold separately.Consult your dealer aboutpipe size.Φ16( 5/8in)Φ19( 3/4in) Page 7
InstallationOverview2Indoor Unit Installation Summary12Min. 10-15cm(4-6 in.)Min.8-12cm(3-5 in)Min.8-12cm(3-5 in)Optimally2.0-2.6m(80-100 in)Hole can be drilled on either left or right sideRecommended ClearancesSelect Installation Location(Page 11)3Determine Wall Hole Position(Page 12)4MUST BE PERFECTLY HORIZONTALAttach Mounting Plate(Page 12) Page 8 Drill Wall Hole(Page 12)
67123GroundUSE DOUBLE(BACKUP)WRENCESInstallationOverview5Connect Piping(Page 25)Connect Wiring(Page 17)Prepare Drain Hose(Page 14)8Wrap Piping & Cables together(Page 18)9STEP8Mount the Indoor Unit(Page 18) Page 9
3Unit ComponentsInstallationOverviewWall Mounting PlateFront PanelLouverDrainage PipeFunctional Filter(On Front of Main Filter - Some Units)Signal CableRefrigerant PipingRemote ControlRemote ControlHolder (Some Units)Outdoor UnitPower Cable(Power Panel Housing)Fig. 2.1NOTE ON ILLUSTRATIONSIllustrations in this manual are strictly for explanatory purposes. The actual shape of your indoor unitmay be slightly different. The actual shape shall take precedence over graphical representations. Page 10
Indoor Unit Installation4Indoor UnitInstallationDO NOT install unit in the followinglocations:Near any sources of heat, steam, orcombustible gasPRIOR TO INSTALLATIONNear flammable items such as curtains orBefore installing the indoor unit, refer to theclothinglabel on the product box to make sure that theNear any obstacle that might block airsystem set is a matching set for capacity, voltage,circulationand efficiency (indoor and outdoor).Near doorwaysStep 1: Select installation locationIn locations subjected to direct sunlightBefore installing the indoor unit, you mustchoose an appropriate location. The followingNOTE ABOUT WALL HOLE:are standards that will help you chooseThere are multiple options for piping routes:an appropriate location for the unit.While choosing a location, be aware that youProper installation locations meet theshould leave ample room for a wall hole (seefollowing standards:wall hole drilling for piping connection step) Good air circulationfor the signal cable and refrigerant pipingthat connect the indoor and outdoor units. Convenient drainageThe wall hole position for all piping can be Isolated enough to not cause disturbancelocated at either the right or left side of thefor other peopleindoor unit (while facing unit). Pipes can also Firm and solid—the location will not vibratebe routed out from either side, or the bottom. Strong enough to support the weight of theunit A location at least 1m (40 in) from all otherelectrical devices (e.g., TV, radio, computer)Installation Instructions – IndoorUnit Page 11
Refer to the following diagram to verify these recommended distances from walls and ceiling:10-15cm (4-6 in) or moreIndoor UnitInstallation8-12cm (3-5 in)or more8-12cm (3-5in)or more2.0 m (80 in) or more2.6 m (100 in) or lessFig. 3.1Step 2: Attach mounting plate to the wallThe mounting plate is the device on top of whichthe indoor unit will be mounted.1. Remove the screw that attaches the mountingplate to the back of the indoor unit.2. Place the mounting plate against the wallin a location that meets the standards inthe “Select Installation Location” step. (See“Mounting Plate Dimensions” for detailedinformation on mounting plate sizes.)3. Drill holes for mounting screws in places that: have studs and can support the weight ofthe unit correspond to screw holes in the mountingplate4. Secure the mounting plate to the wall withthe screws provided.5. Make sure that the mounting plate is fully flatagainst the wall.NOTE FOR CONCRETE OR BRICK WALLS:If the wall is made of brick, concrete, or similarmaterial, drill 5mm-diameter (3/16 in-diameter)holes in the wall and insert the provided sleeveprovided. Then, secure the mounting plate tothe wall by tightening the screws directly intothe clip anchors. Page 12 Step 3: Drill wall hole for connective pipingYou must drill a hole in the wall for the refrigerantpiping, the drainage pipe, and the signal cablethat will connect the indoor and outdoor units.1. Determine the location of the wall hole basedon the position of the mounting plate. Referto “Mounting Plate Dimensions” on thenext page to help you determine the optimalposition. The wall hole should have a 65mm(2.5in) diameter at least, and at a slightdownward angle to facilitate drainage.2. Using a 65mm (2.5 in) or 90mm(3.5 in)(depending on models) core drill, drill ahole in the wall. Make sure that the holeis drilled at a slight downward angle, sothat the outdoor end of the hole is lowerthan the indoor end by about 5mm to 7mm(3/16-5/16 in). This will ensure proper waterdrainage. (See Fig. 3.2)3. Place the protective sleeve in the hole. Thisprotects the edges of the hole and will helpseal it when you finish the installation process.CAUTIONWhen drilling the wall hole, make sure toavoid wires, plumbing, and other sensitivecomponents.
IndoorW allOutdoor37mm (1-1/2in)348mm (13-3/4 in)179mm (7-1/16in)101mm (4 in)290mm (11-3/8 in)49mm (1-15/16 in)49mm (1-15/16in)Right rear wallhole 65mm (2-1/2in)232mm (9-1/8in)128mm (5-1/16in)43mm (1-3/4in)Left rear wallhole 65mm (2-1/2in)43mm (1-3/4in)Indoor unit outlineRight rear wallhole 65mm (2-1/2in)802mm (31-5/8in)517mm (20-3/8in)144mm (5-5/8in)138mm (5.45in)WS018-19 SEER57mm (2-1/4in)58mm (2-1/4in)297mm (11-3/4in)WS012-19 SEERWS009-22 SEERWS012-22 SEER192mm (7-1/2in)43mm (1-3/4in)426mm (16-3/4in)40mm (19/16in)Indoor unit outlineLeft rear wallhole 65mm (2-1/2in) 34mm (1-3/8in)965mm (38in)Right rear wallhole 65mm (2-1/2in)Model CWS024-19 SEERWS018-22 SEERWS024-22 SEER553mm (21-3/4in)300mm (11-3/4in)219mm (8-5/8in)76mm(3in)53.5mm (2-1/16in)47mm (1-7/8in)53.5mm(2-1/16in)Correct orientation of the Mounting Plate722mm (28-1/2 in)319mm (12-9/16in)MOUNTING PLATE DIMENSIONSDifferent models have different mounting plates.To ensure that you have ample room to mountthe indoor unit, refer to the diagrams to the rightwhich show different types of mounting plates,along with the following dimensions: Width of the mounting plate Height of the mounting plate Width of indoor unit relative to the plate Height of indoor unit relative to the plate Recommended position of wall hole (bothto the left and right of the mounting plate) Relative distances between the screw holesIndoor unit outlineLeft rear wallhole 65mm (2-1/2in)335mm (13-1/4in)Fig. 3.2Fig.3.2136mm (5-3/8in)149mm(5-7/8in)Indoor unit outline47mm (1-7/8in)Right rear wallLeft rear wall174.3mm (6-7/8in)hole 65mm (2-1/2in)1080mm (42-1/2in) 151mm (5-15/16in) hole 65mm (2-1/2in)Model D644mm (25-3/8in)WS030-17 SEERWS036-17 SEER362mm (14-1/4in)Be sure to obtain perfect horizontal position257mm (10-1/8in)389mm (15-1/4in)172mm (6-3/4in)332mm (13-1/16in)Left rear wallhole 65mm (2-1/2in)Indoor unit outline52mm (2-1/16in)1259mm (49-1/2in)52mm (2-1/16in)Right rear wallhole 65mm (2-1/2in)Model ENOTE: When the gas side connective pipe isΦ 16mm (5/8in) or more, the wall hole couldbe 75mm (3 in). (for 24, 30, 36K Models). Page 13 Indoor UnitInstallation5-7m m(3/16 5/16 in)WS009-19 SEER
Step 4: Prepare refrigerant pipingThe refrigerant piping is inside an insulatingsleeve attached to the back of the unit. You mustprepare the piping before passing it through thehole in the wall. Refer to the “Refrigerant PipingConnection” section of this manual for detailedinstructions on pipe flaring and flare torquerequirements, technique, etc.Indoor UnitInstallation1. Based on the position of the wall hole relativeto the mounting plate, choose the side fromwhich the piping will exit the unit.2. If the wall hole is behind the unit, keep theknock-out panel in place. If the wall hole is tothe side of the indoor unit, remove the plasticknock-out panel from that side of the unit.(See Fig. 3.3 ). This will create a slot throughwhich your piping can exit the unit. Useneedle nose pliers if the plastic panel is toodifficult to remove by hand.3. Use scissors to cut down the length of theinsulating sleeve to reveal about 15cm (6in)of the refrigerant piping. This serves twopurposes: To facilitate the “Refrigerant PipingConnection” process. To facilitate “Gas Leak Checks” and enableyou to check for dents or kinks.4. If existing connective piping is alreadyembedded in the wall, proceed directly tothe “Connect Drain Hose” step. If there is noembedded piping, connect the indoor unit’srefrigerant piping to the connective pipingthat will join the indoor and outdoor units.Refer to the “Refrigerant Piping Connection”section of this manual for detailed instructions.5. Based on the position of the wall holerelative to the mounting plate, determine thenecessary angle of your piping.6. Grip the refrigerant piping at the base of thebend.7. Slowly, and with even pressure, bend the pipingtowards the hole. Do not kink or damage thepiping during the process !!!! (CAUTION)NOTE ON PIPING ANGLERefrigerant piping can exit the indoor unit fromfour different angles: Left-hand side Left rear Right-hand side Right rearRefer to Fig. 3.4 for details.Knock-out PanelFig. 3.3LEFT HAND SIDERecommendedfor side exitRIGHT HAND SIDENot Recommendedunless absolutely neededRIGHT REARLess Recommendedbut most commonFig. 3.4LEFT REARMost Recommendedbut less commonCAUTIONBe extremely careful not to kink or damage the piping while bending them away from theunit. Any dents or kinks in the piping will seriously affect the unit’s performance. Page 14
NOTE ON DRAIN HOSEPLACEMENTDUAL DRAIN HOLE LOCATIONS EXISTThe indoor unit has 2 drain connections on left andright sides. Either one can be utilized. One side willhave a hose connected, while the other is plugged.CORRECTMake sure there are nokinks, dents or siphons inthe drain hose, to ensureproper drainage.Indoor UnitInstallationStep 5: Connect drain hoseBy default, the drain hose is attached to the lefthand side of unit (”left” when facing the backof the unit). However, it can also be attached tothe right-hand side.1. To ensure proper drainage, attach the drainhose on the same side that your refrigerantpiping exits the unit.2. Attach drain hose extension (soldseparately) to the end of drain hose.3. Wrap the connection point firmly with Teflontape to create a good seal, and to preventleaks.4. For the portion of the drain hose that willremain indoors, wrap it with foam pipeinsulation to prevent condensation.5. Remove the air filter and pour a small amountof water into the drain pan to make sure thatwater flows from the unit smoothly.Fig. 3.5NOT CORRECTKink/siphon in the drain hose,will create water traps.Make sure to arrange the drain hoseaccording to Fig. 3.5 .Fig. 3.6DO NOT kink the drain hose.DO NOT create a water trap (siphon).NOT CORRECTKink/siphon in the drain hose,will create water traps.DO NOT put the end of the drain hosein water or in a container that willcollect water.Fig. 3.7NOT CORRECTD
SPLIT-TYPE ROOM AIR CONDITIONER CS78421-548-754 IMPORTANT NOTE: Read this manual carefully before installing or operating your new air conditioning unit. Make sure to save this manual for future reference. Owner’s Manual SPLIT-TYPE ROOM AIR CONDITIONER CS78421-548-754 IMPORTANT NO TE: Read this manual carefully befor e installing
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