LETO Installation Manual
Contents
1. Fig 26 TEST RUNNING Safety and leakage check Electrical safety check Perform the electric safe check after completing installation 1 Grounding work After finishing grounding work measure the grounding resistance by visual detection and grounding resistance tester Make sure the grounding resistance is less than 4 2 2 Electrical leakage check performing during test running During test operation after finishing installation the serviceman can use the electroprobe and multimeter to perform the electrical leakage check Turn off the unit immediately if leakage happens Check and find out the solution ways till the unit operate properly Gas leak check 1 Soap water method Apply asoap water or a liquid neutral detergent on the indoor unit connection or outdoor unit Indoor unit pj Ic connections by a soft brush to check for leakage a of the connecting points of th piping If bubbles come out the pipes have leakage Cover es 2 Leak detector Use the leak detector to check for leakage CAUTION A Lo packed valve B Hi packed valve C and D are ends of indoor unit connection Outdoor unit check point Fig 27 Test running Perform test operation after completing gas leak check at the flare nut connections and electrical safety check e Check that all tubing and wiring have been properly connected Check that the gas and liquid side service valves are fully open Connect the2. This symbol indicates the possibility of injury or damage to property m The items to be followed are classified by the symbols Z WARNING gt 1 Engage dealer or specialist for installation If installation done by the user is defective it will cause water leakage electrical shock fire 2 Install according to this installation instructions strictly If installation is defective it will cause water leakage electrical shock fire 3 Use the attached accessories parts and specified parts for installation otherwise it will cause the set to fall water leakage electrical shock fire Symbol with background white denotes item that is PROHIBITED from doing 4 Install at a strong and firm location which is able to withstand the set s weight If the strength is not enough or installation is not properly done the set will drop and cause injury 5 For electrical work follow the local national wiring standard regulation and this installation instructions An independent circuit and single outlet must be used If electrical circuit capacity is not enough or defect found in electrical work it will cause electrical shock fire 6 Use the specified cable and connect tightly and clamp the cable so that no external force will be acted on the terminal If connection or fixing is not perfect it will cause heat up or fire at the connection 7 Wiring routing must be properly arranged so that control
3. TEST RUNNING TES EMUMMING seieren E A E E R E abhoadawulhctmins stances S REE 14 Read This Manual Inside you will find many helpful hints on how to install and test the air conditioner properly CAUTION e Contact an authorised service technician for repair or maintenance of this unit Contact an authorised installer for installation of this unit e This appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety Children should be supervised to ensure that they do not play with the appliance If the power cord is to be replaced replacement work shall be performed by authorised personnel only Installation work must be performed in accordance with the national wiring Standards by authorised personnel only SAFETY PRECAUTIONS Read the follow SAFETY PRECAUTIONS carefully before installation Electrical work must be installed by a licensed electrician Be sure to use the correct rating of the power plug and main circuit for the model to be installed e Incorrect installation due to ignoring of the instruction will cause harm or damage m The seriousness is classified by the following indications A WARNING This symbol indicates the possibility of death or serious injury A CAUTION
4. board cover is fixed properly If control board cover is not fixed perfectly it will cause heat up at connection point of terminal fire or electrical shock 8 When carrying out piping connection take care not to let air substances other than the specified refrigerant go into refrigeration cycle Otherwise it will cause lower capacity abnormal high pressure S in the refrigeration cycle explosion and injury 9 Do not modify the length of the power supply cord or use of extension cord and do not share the S single outlet with other electrical appliances Otherwise it will cause fire or electrical shock Z CAUTION 1 This equipment must be earthed and installed with earth leakage current breaker It may cause electrical shock if grounding is not perfect 2 Do not install the unit at place where leakage of flammable gas may occur In case gas leaks and accumulates at surrounding of the unit it may cause fire D 3 Carry out drainage piping as mentioned in installation instructions If drainage is not perfect water may enter the room and damage the furniture v INSTALLATION INSTRUCTIONS Selecting installation place Select aninstallation location which is rigid and strong enough to support or hold the unit and select a location for easy maintenance Read completely then follow step by step Indoor unit e Do not expose the indoor unit to heat or steam e Selecta place where there are no
5. concrete or the same intensity construction or actions to reinforce damping supporting should be taken The connection between bracket and wall bracket and the air conditioner should be firm stable and reliable e Be sure there is no obstacle which block radiating air Settlement of outdoor unit A e Anchor the outdoor unit with a bolt and nut 610o0r 68 tightly and horizontally on a concrete or rigid mount REFRIGERANT PIPE CONNECTION Outdoor unit dimension Mounting dimensions mm WxHxD A mm B mm ma 780x540x250 549 280 30 7 10x21 1 4x9 4 5 In 21 3 5 In 11 In 3 F eld 760x590x275 530 290 30x23 1 5x10 4 5 In 20 9 10 In 11 2 5 In J Air outlet 670x540x250 484 275 26 2 5x 21 1 4x9 4 5 In 19 In 10 4 5 In 775x545x310 600 320 Fig 14 30 1 2x21 1 2x 12 1 5 In 233 51In 123 511 840x700x320 560 335 33 7 10x 27 3 5x12 3 5 In 22 In 13 1 5 In 895x860x330 590 333 35 4 16x 33 14 16 x13 In 23 1 5 In 13 1 10 In Drain joint installation NOTE The drain joint is slightly different Seal Drain joint according to the different outdoor unit For the drain joint with the seal Fig 15 A first s Z q fit the seal onto the drain joint then insert the Base pan hole of outdoor unit drain joint into the base pan hole of outdoor unit TN B rotate 90 to securely assemble them To install Sea
6. connecting part of extension drain hose with a shield pipe do not let the drain hose slack Rear right piping S gt Right hand piping Connective pipe installation 1 For the left hand and right hand piping remove the pipe cover from the side panel Ft 2 For the rear right hand and rear left hand RC Rear left piping piping install the piping as shown Fix the end of the connective pipe Refer to Tightening Connection in REFRIGERANT PIPING CONNECTION Left hand piping Ww Fig 8 Fig 9 a z Upper Hook 4 Indoor unit installation 1 Pass the piping through the hole in the wall 2 Putthe upper claw at the back of the indoor unit on the upper hook of the installation plate move the indoor unit from side to side to see that it is securely Fig 10 hooked see Fig 10 amp Fig 11 3 Piping can easily be made by lifting the indoor unit with a cushioning material between the indoor unit and the wall Get it out after finish piping 4 Push the lower part of the indoor unit up on the wall then move the indoor unit from side to side up and down to check if it is hooked securely Lower Hook _ Cushioning material Fig 11 INSTALLATION INSTRUCTIONS 5 Piping and wrapping Bundle the tubing connecting cable and drain hose with tape securely evenly as shown in Fig 12 Indoor unit Ponding box e Because the condensed water from rear of the in
7. obstacles in front or around the unit e Make sure that condensation drainage can be conveniently routed away e Do not install near a doorway Ensure the spaces indicated by arrows from the More than 12cm 5 Inch wall ceiling or other obstacles e Aplace where noise prevention is taken into consideration Aplace 1m 39 In or more to TV or radio instrument e Aplace where air circulation in the room is good There should not be any direct sunlight Otherwise the sun will fade the plastic cabinet and affect its appearance If unavoidable sunlight prevention should be taken into considenation Outdoor unit e If an awning is built over the outdoor unit to prevent direct sunlight or rain exposure make sure that heat radiation from the condenser is not restricted e Keep the spaces indicated by arrows from wall or other obstacles e Donot place animals and plants in the path of the air inlet or outlet e Take the air conditioner weight into account and select a place where noise vibration and hot air discharged will not be an issue e Donotinstallina place full of machine oil or sulfide gas such as hot spring resort Donotinstallina saline place such as coast e Donotinstallina place where there are high frequency machines such as wireless equipment welding machine or medical facility More than 30cm 11 4 5 In Lor Front Rooftop installation More than 200cm 78 7 10 In More than 15cm 6 Inch
8. stud finder to locate studs to prevent unnecessary damage to the wall e A minimum pipe run of 3m 9 8ft is required to minimise vibration amp excessive noise e Two of theA B and C directions shouldbe free from obstructions This illustration is for explanation purposes only Copper lines must be insulated independently Note Exceptthe above parts provided the other parts needed during installation you must purchase a a L da ey be Wy Additional drain pipe VATA CAT above D kz oJ 5 a 5 3 o CRU D T Loop the H connective cable INSTALLATION INSTRUCTIONS Indoor unit installation Correct orientation of Installation Plate 1 Fit the Installation Plate 1 Fit the installation plate horizontally on structural parts of the wall with spaces around the installation plate 2 If the wall is made of brick concrete drill eight 8 5mm 1 5 In diameter holes in the wall Insert Clip anchor for appropriate mounting screws 3 Fit the installation plate on the wall with eight 8 type A screws Indoor unitoutine _ Installation plate __D 120mm 5 In orl 120 51 Note more to wall roe io wal g j 5 2 i a Fit the Installation Plate and drill holes in l 1 the wall according to the wall structure and rfi panto 3 E y Hee side corresponding mounting points on instal
9. to the ceiling po pad E pee OI More than 12cm I 5 Inch More than 2 4m 94 1 2 In from the floor Fig 1 More than 30cm 11 4 5 In More than 60cm 23 3 5 In Right e If the outdoor unit is installed on a roof structure be sure to level the unit e Ensure the roof structure and anchoring method are adequate for the unit location Consult local codes regarding rooftop mounting Tools needed for installation Level gauge Screwdriver Electric drill Hole core drill 65mm 2 3 5 In Flaring tool set Specified torque wrenches 1 8kgf m Gas leak detector Vacuum pump Gauge manifold Users manual 4 2kgf m 5 5kgf m 6 6kgf m Thermometer different depending on model No Multimeter Spanner half union Pipe cutter Measuring tape Hexagonal wrench 4mm 4 25 In INSTALLATION INSTRUCTIONS Accessories Number Name of Accessories Q ty 1 Installation Plate 4 2 Clip Anchor 5 8 depending on models 3 Self tapping Screw AST3 9X25 5 8 depending on models 4 Seal For cooling amp heating modles only 1 5 Drain Joint For cooling amp heating modles only 1 Connecting Liquid side Po 6 pipe q d 9 53 Parts you must purchase Assembly Consult the dealer about 9 53 the pipe size Gasside 12 7 16 7 Remote controller 8 Self tapping Screw B ST2 9X10 9 Remote controller holder Optional parts CAUTIO e Use a
10. Applicable to SENL OQHD I e TM SENL 09HD O SENL 12HD I SENL 12HD O SENL 18HD I SENL 18HD O SENL 24HD I SENL 24HD O Split Type Wall mounted Inverter Room Air Conditioner Thank you for purchasing of SENVILLE air conditioner To guarantee safety and best efficiency please read this man ual carefully and keep a suitable storage for reference CONTENTS SAFETY PRECAUTIONS WV ANIMA asese fee ets eset a ater cee seieciene ec acitemis cue a oo ane ee cjenene suena eae deeaee Suieeaeed ences 2 GAUON sociae e TD EEA EE EARE EEEa EESE E a EEA E LEE 2 INSTALLATION INSTRUCTIONS Selecting installation place s nnee neen nenne oeritt aces eeeeeceeeesseeeeeeeeeseeseeeseeees cesses EErEE EEEE ceeeeeeaneaeeeeeetenes 3 ACCESSOr eS oo cece eccccc cece cccecee cee ce eeee cece cueeeeeeeeceeeeeees cee cege eee ceeeeeceencensaes seeeeesceegueeeeeeeenseeeeesenseeeeeeeeees 4 INGOOK UNI ANSTAN At OM scx ersinnen ae aa a aA E E a a aaa 5 Outdoor imit installation soasoani E A AE O A N 7 REFRIGERANT PIPE CONNECTION Refrigerant pipe Connection lt cesesctssensecdovace ieaiaia EE aa E EE e EE E Eea a EAER 8 ELECTRICAL WORK Electrical WOTE o e a a r ae a aa a e a ae cue adgaeiaxieddesntiaveennesSeaiesavacses 9 AIR PURGING Air purging with VACUUM PUMP asresten niesen rie cece aa a AE aeaaea 12 Safety and leakage CHECK cccccccccceceeceeeeeeeeeeeeeseeeeee ceaseeeeseeeseasecseeeeeeaeae aa eeeeeaeegeseeeeeeeeaeaeeeess 14
11. arge hose to a charge port of the low pressure valve on the gas pipe side 2 Connect the charge hose connection to the vacuum pump 3 Fully open the handle Lo of the manifold valve 4 Operate the vacuum pump to evacuate After starting evacuation slightly loose theflare nut of the Lo valve on the gas pipe side and check that the air is entering Operation noise of the vacuum pump changes and a compound meter indicates 0 instead of minus 5 After the evacuation is complete fully close the handle Lo of the manifold valve and stop the operation of the vacuum pump Make evacuation for 15 minutes or more and check that the compound meter indicates 76cmHg 1x10 Pa 6 Turn the stem of the packed valve B about 45 counterclockwise for 6 7 seconds after the gas coming out then tighten the flare nut again Make sure the pressure display in the pressure indicator is a little higher than the atmosphere pressure 7 Remove the charge hose from the Low pressure charge hose 8 Fully open the packed valve stems B and A 9 Securely tighten the cap of the packed valve AIR PURGING Refrigerant Outdoor Indoor unit unit A Gas side _ C Liquid side _ pD fe Packed valve Half union Fig 24 Flare nut FN Valve a foe Valve stem Fig 25 Manifold valve Compound meter Pressure gauge 76cmHg Handle Lo Charge hose gt Charge hose we Vacuum pump Low pressure valve
12. cated on the panel of the outdoor unit to connect the wire 6 All wiring must comply with local and national electrical codes and be installed by qualified and skilled electricians 7 An individual branch circuit and single receptacle used only for this air conditioner must be available See the following table for suggested wire sizes and fuse specifications O ELECTRICAL WORK Minimum norminal cross sectional area of conductors Rated current Nominal cross sectional of appliance area A mm gt 3 and lt 6 0 75 gt 6 and lt 10 1 gt 10 and lt 16 1 5 gt 16 and lt 25 2 5 NOTE The cable size and the current of the fuse or switch are determined by the maximum current indicated on the nameplate which located on the side panel of the unit Please refer to the nameplate before selecting the cable fuse and switch Connect the cable to the indoor unit NOTE Before performing any electrical work turn off the main power to the system 1 The inside and outside connecting cable can be connected without removing the front grille 2 The indoor power cord type is HO5VV F or HO5V2V2 F the outdoor power cord and interconnected cord type is HO7RN F 3 Lift the indoor unit panel up remove the electrical box cover by loosening the screw as shown in Fig 22 4 Ensure the colour of wires of outdoor unit and the terminal Nos are the same to the indoor s respectively 5 Wrap those cables
13. door unit is gathered in ponding box andis Connective Pipe room iped out of D t put thi Ise i Alle of room Do not put anything else in Connective i pipe CAUTION Wrapping belt Connect the indoor unit first then the Drain hose outdoor unit e Do not allow the piping to let out from the Fig 12 back ofthe indoor unit e Be careful not to let the drain hose slack e Heatinsulated both of the auxiliary piping e Be sure that the drain hose is located at the lowest side of the bundle Locating at the upper side can cause drain pan to overflow inside the unit Never intercross nor intertwist the power wire with any other wiring e Run the drain hose sloped downward to drain out the condensed water smoothly Outdoor unit installation Outdoor installation precaution Install the outdoor unit on a rigid base to prevent increasing noise level and vibration e Determine the air outlet direction where the discharged air is not blocked In the case that the installation place is exposed to strong wind such as a seaside make sure the fan operating properly by putting the unit lengthwise along the wall or using a dust or shield plates e Specially in windy area install the unit to prev ent the admission of wind If need suspending installation the installation bracket should accord with technique requirement in the installation bracket diagram e The installation wall should be solid brick
14. h vacuum pump Preparation Check that each tube both liquid and gas side tubes between the indoor and outdoor units have been properly connected and all wiring for the test run has been completed Remove the service valve caps from both the gas and the liquid side on the outdoor unit Note that both the liquid and the gas side service valves on the outdoor unit are kept closed at this stage Pipelength and refrigerant amount Connective Air purging pipe length method Additional amount of refrigerant to be charged Use vacuum Less than 5m pump Use vacuum Liquid side 6 35 Liquid side 9 53 More than 5m st Bi pump R22 Pipe length 5 x30g m R22 Pipe length 5 x60g m R410A Pipe length 5 x20g m R410A Pipe length 5 x40g m When relocate the unit to another place perform evacuation using vacuum pump e Make sure the refrigerant added into the air conditioner is liquid form in any case Not applicable to the units adopt freon R22 Caution in handling the packed valve Open the valve stem until it hits against the stopper Do not try to open it further e Securely tighten the valve stem cap with a spanner or the like Valve stem cap tightening torque See Tightening torque table in previous page When Using the Vacuum Pump For method of using a manifold valve refer to its operation manual 1 Completely tighten the flare nuts A B C D connect the manifold valve ch
15. hown in the table below Fig 18 Outer diam A mm mm Max Min Handle o 6 35 1 3 0 7 09 52 1 6 1 0 612 7 1 8 1 0 cone p 16 2 4 2 2 Copper pipe Clamp handle Red arrow mark Tightening Connection e Align the center of the pipes e Sufficiently tighten the flare nut with fingers and then tighten it with a spanner and torque wrench as shown in Fig 20 amp 21 Fig 19 lt A N 2 D 0g Outer Tightening Additional anang diam torque N cm torque N cm Indoor unit tubing Flarenut Pipings 1500 1600 6 35 453kgf cm 163kgf cm 2500 2600 Fig 20 9 52 o55kgf cm 265kgf cm 3500 3600 12 7 357kgficm 367kgf cm 4500 4700 n 16 459kgf cm 479kgf cm Caution Excessive torque can break nut depending on installation conditions Fig 21 Electrical work s Electric safety regulations for the initial Installation 1 If there is serious safety problem about the power supply the technicians should refuse to install the air conditioner and explain to the client until the problem is solved 2 Power voltage should be in the range of 90 110 of rated voltage 3 The creepage protector and main power switch with a 1 5 times capacity of Max Current of the unit should be installed in power circuit 4 Ensure the air conditioner is grounded well 5 According to the attached Electrical Connection Diagram lo
16. l drain joint as shown in Fig 15 B insert the drain ENa pipe joint into the base pan hole of outdoor unit until it A remains fixed with a clicking sound Connecting the drain joint with an extension drain hose Locally purchased in case of the water draining off the Fig 15 outdoor unit during the heating mode Y X X X Refrigerant pipe connection p pa Oblique Roughness Bur 1 Flaring work Main cause for refrigerant leakage yA AS is due to defect in the flaring work Carry out correct flaring work using the following procedure Fig 16 A Cut the pipes and the cable 1 Use the piping kit accessory or pipes purchased locally i 2 Measure the distance between the indoor On Pie and the outdoor unit Os Reamer 3 Cut the pipes a little longer than the measured distance Point down 4 Cut the cable 1 5m 59 In longer than the pipe length B Burr removal 1 Completely remove all burrs from the cut cross section of pipe tube 2 Put the end of the copper tube pipe ina downward direction as you remove burrs in order to avoid dropping burrs into the tubing O Fig 17 ELECTRICAL WORK C Putting nut on Flare nut Remove flare nuts attached to indoor and outdoor unit then put them on pipe tube having completed burr removal not possible to put them on after flaring work D Flaring work Copper tube Firmly hold copper pipe in a die in the dimension s
17. lation 2e n t pipe hole 65 plate The installation plate provided with the Model A A 710 B 250 C 100 D 110 machine is differrent according to the models Model B A 790 B 265 C 100 D 150 t 150mm or more to ceiling Installation plate Dimensions are in mm and In unless Indoor unit outline 150 a185 otherwise stated i 120mm 5 In or 120mm 5 In or more to wal more to 5 I S 8s i iQ Left rear side pe ti Ri ht rear side refrigerant Q Jo o W 19 refrigerant pipe hole 65 i a aca N pipe hole 65 920 Model C t 150mm 6 In or more from the ceiling 100 Hooked Part 120 mm 5 In ra re timm njornor pua vr Pale Ele Indoor Unit Outline Model D Fig 5 2 Drill a hole in the wall wali Td Outdoor 1 Determine hole positions according ncoor to the diagramdetailed in Fig 5 Drill R one hole 65mm 2 3 5 In slanting a ix slightly to outdoor side 2 Always use wall hole conduit when Z drilling metal grid metal plate T Fig 6 INSTALLATION INSTRUCTIONS 3 Connective Pipe and Drainage Installation j Drainage ul A R 1 Run the drain hose sloping downward X ZA Z Do not install the drain hose as i Do not put the end of illustrated in Fig 7 Do not block water flow by a rise drain hose into water 2 When connecting extension drain hose Fig 7 insulate the
18. not connected with terminals with insulation tapes so that they will not touch any electrical components Secure the cable onto the control board with the cord clamp Connect the cable to the outdoor unit 1 Remove the cover control from the unit by loosening the 3 screws See Fig 23 2 Dismount caps on the conduit panel 3 Temporarily mount the conduit tubes not included on the conduit panel 4 Properly connect both the power supply and low voltage lines to the corresponding terminals on the terminal block 5 Ground the unit in accordance with local codes 6 Be sure to size each wire allowing several inches longer than the required length for wiring 7 Use lock nuts to secure the conduit tubes Front Panel cover Electrical box Terminal block of indoor unit L1 L2 99 s QQ LNS B OO OOS SY 0 To outdoor unit r Ps To outdoor unit Conduit panel Connecting cable Cover control t Power supply cord Fig 23a Be sure to comply with local codes while running the wire from the indoor unit to the outdoor unit Every wire must be connected firmly No wire should be allowed to touch refrigerant tubing the compressor or any moving parts Loose wiring may cause the terminal to overheat or result in unit malfunction A fire hazard may also exit Therefore be s
19. ons to which the unit is subjected during the course of transportation Check them and make sure that they are all tightly fastened If they are loose it could cause burn out of the wires 3 Specification of power source 4 Confirm that electrical capacity is sufficient 5 See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate 6 Confirm that the cable thickness is as specified in the power source specification 7 Always install an earth leakage circuit breaker in a wet or moist area 8 The following would be caused by voltage drop Vibration of a magnetic switch which will damage the contact point fuse breaking disturbance of the normal function of the overload 9 The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an air gap contact separation of at least 3mm in each active phase conductors Air purging Air and moisture in the refrigerant system have undesirable effects as indicated below Pressure in the system rises Operating current rises Cooling or heating efficiency drops Moisture in the refrigerant circuit may freeze and block capillary tubing Water may lead to corrosion of parts in the refrigeration system Therefore the indoor unit and tubing between the indoor and outdoor unit must be leak tested and evacuated to remove any noncondensables and moisture from the system Air purging wit
20. power press the ON OFF button on the remote controller to turn the unit on 2 Use the MODE button to select COOL HEAT AUTO and FAN to check if all the functions works well 3 When the ambient temperature is too low lower than 17 C the unit cannot be controlled by the remote controller to run at cooling mode manual operation can be taken Manual operation is used only when the remote controller is disable or maintenance necessary Hold the panel sides and lift the panel up to an angle until it remains fixed with aclicking sound Press the Manual control button to select the AUTO or COOL the unit will operate under Forced AUTO or COOL mode see User Manual for details 4 The test operation should last about 30 minutes Manual control oO AUTO COOL button The design and specifications are subject to change without prior notice for product improvement Consult with the sales agency or manufacturer for details
21. ure all wiring is tightly connected Disconnecting means must be provided and shall be located within sight from and readily accessible from the air conditioner Connecting cable with conduit shall go through the hole of the conduit panel ELECTRICAL WORK Power supply Power supply 1 208 230V 60Hz Special branch circuit breaker Fuse Breaker capacity 20A Note To prevent wires loosening or leaving the Cord Clamp please select proper cord diameter to fill the holes on the cord clamp Terminal block of outdoor unit To indoor unit To power supply 1 olle L1 L2 S Li L2 lslelelts To indoor unit To power supply 2 7 To indoor unit To power supply 3 Fig 23b AIR PURGING C CAUTION 3 After the confirmation of the above conditions prepare the wiring as follows 1 Never fail to have an individual power circuit specifically for the air conditioner As for the method of wiring be guided by the circuit diagram posted on the inside of control cover 2 The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrati
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