INSTALLATION MANUAL
Contents
1. la uno JOSSAIAWOD Ed ZY BLACI N uonopioud 2 NSSSIA MO R uogo 04d inss sd IH ANIEL IHM 034 Cay yun ml UM 1015 WOO uonoajoid aseyd JLIHM EI Janaanig HN 1810V18 is ae sy Ne rw 00 wy NS any Let ILHA p Hna mau HHA 4200 Hm0008 1H SS Om Om Om Om Y 10119 INWOOD HUN JOOPINO ol ONIOYOTNN WM Wid AA ein yeay aseoyueso 9102 UD LYH AJEA Doug 9AS LAS 2 N3389 M0 TIA a Toufoysuen J9MO y SNYUL Qb ETE Su 2ojonpurjuamno 19719 119 2 A eege osuas dwapa eyosig Z4 1 L4 LL sosuas ambedust a6seyosip 001 id Me ee Ie 7T Josuas dwa JOOp no D O O y i i DIN 1v3 71009 EH Joslhias duet adig el EMS YMS NO TT Huet SIPPIA 6dX pdX Sits E af2. Note the first branch pipe is according to the total ability of the outdoor unit the others could not larger than it Tabled size and connection of branch pipes 28 45 4 way cassette 12 7 Flaring nut 6 35 Flaring nut 56 112 4 way cassette 16 0 Flaring nut 9 53 Flaring nut R410A 22 36 duct type ceiling de floor 12 7 Flaring nut 6 35 Flaring nut 45 71 duct type ceiling de floor 16 0 Flaring nut 9 53 Flaring nut 22 56 wall mounted 12 7 Flaring nut 6 35 Flaring nut Take 16 16 12 HP outdoor unit as example 12HP 16HP 16HP e eer eg LMN en 4e5f6 97h 8i 9 OCH Be 2 3 A7 EN ei gt 9 5P 5P 5P 5P 5P 5P 5P 5P 4P parallel outdoor unit 1 Branch pipes Nol MN thesizeis 25 0 12 7 1 15 9 35 0 According to the cor respondin g outdoor units ability 2 1 pipe total HP is 16 12 28HP pipe size is 0 3 model of branch joint a Jupe YDSA RD 101 b choose YDSA RDO1 Room inside 1 Branch pipes are 10 18 refer to table 5 the size is 15 9 9 53 2 Subordinate indoor units of pipe 9 are 8 9 total HP is 5 4 9P lt 12P pipe 9 sizeis 22 0 model of branch joint j YDSA RD101 3 Subordinate indoor units of pipe 8 are 7 8 9 totel HP is 5 5 4 14P lt 16Ppipe size is 12 7 model of branch joint YDSA RD102
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4. pS Indoor unit and branch joint Vacuum with vacuum pump Do vacuum with vacuum pump instead of refrigerant 6 Vacuuming should be done from liquid and gas side simultaneously The pressure should be lower than 30Pa Open all valves Refrigerant Amount to be Added Calcu late the add ed refrigerant acc ording to the diame ter and thelength of the liquid side pipe of the ou tdoor ndoor unit connection T he refrigerant is R410A Pipe size on liquid side igera nt to be Added per meter 28 6 0 680kg table2 functional description No 1 Fixed compressor discharge temperature detect por Digital scroll compressor discharge temperature detect port 6 ESCH CX EE ES EC 1 7 1 la e r aje co Po No 2Fixed compressor discharge temperature detect port 23 28 RO PR PO PO POP r e lh Ss O N ojojoj Please establish the address of indoor and outdoor unit before debugging High voltage in the electrically controlled box do not move if not professional Address dial of outdoor unit O The address dial of outdoor unit is shown below when outdoor unit is on namely examines outdoor e a scheme quantity and determines the main unit or auxiliary unit according to outdoor unit address Address 0 outdoor main unit Address 1 outdoor auxiliary unit Address 2 outdoor auxiliary unit Address 3 outdoor auxiliary unit QUERY DESCRIPTION Sw4 query inst
5. 50Hz models Auxi a ae heater ka Note The length in the table equals the value of power cord connecting parallel indoor units indicating the condition that the voltage dropping range is within 2 If the length exceeds the above figure please select the wire diameter according to relevant standard Please follow the control box cover gist for test running on electric 1 Do not start test running until the outdoor unit has been connected to the power for 12hr 2 Make sure to open all valves before test running 3 Do not make forced running Or the protection device will not work which is very dangerous FILL THE NAME OF CONNECTED SYSTEM To clearly identify the connected systems between two or more indoor units and outdoor unit select names for every system and record them on the nameplate on the outdoor electric control box cover Model indoor unit Room Name E g Indoor unit A of the first system on second floo is recorded as 2F 1A CAUTION ON REFRIGERANT LEAKAGE This air conditioner adopts R22 as refrigerant which is safe and noncombustible The room for air conditioner should be big enough that refrigerant leakage can not reach the critical thickness Besides this you can take some action on time 0 Critical thickness the max thickness of Freon without any harm to person R22 critical thickness 0 3 kg m Outdoor unit C C C C L L L oo Indoor unit Room full of
6. Drop Height 15m Drop o Pipe Length Height SE Drop Height between Indoor A Indoor Unit Max Piping Equivalent Length LS175m lt i5m Drop Height unit and outdoor Unit H 70m Indoor Unit to Indoor Unit Indoor Unit Remove Dirt or Water in the Piping O Make sure there is no any dirt or water before connecting the piping to the outdoor units O Wash the piping with high pressure nitrogen never use refrigerant of the outdoor unit Airtight Test 1 C onnect piping on hi pressur e sid e with hi pressur e va lve For multi modules parallel connection please co nnect gas and oil balance valves 2 W eld the piping on ow press ure s ide with gauge joint 3 C harge nitrogen from hi pressur e va lve c ore and gauge jo int 4 After airtight test weld low pressur e ball valve and pip ing on low pressur e sid e 1 Pres sured nitrogen 3 8MP a 40kg cm shou Id be used in the airtigh t test 2 Do not c onnect piping on low pressure s ide and low pressure ball valve be fore charg ing nitrogen 3 The airtight test should never use any ox ygen flammable gas or po isonous gas 4 W rap low press ure valve and balance valves with wet cloth while welding Gas balance valve II Low pressure valve Gas balance valve I d Hi pressure valve P et ER g O 4 D acs Gauge joint
7. GE a 4 gt 1000mm 26 P 16HP 12HP X 2 16HP X 2 PHIGHP LOHP 16HPX3 hi 30 32 AILS ojo Cl I w Pipe between outdoor unit and the first branch Main pipe Front view gt 45 y Refer to Number 1 in picture below gt 300mm 7 Size of main pipe connecting multi modules gt 1000mm lt Number 2 in picture below D Airflow deflector Pipe between branches Number 3 in picture below Front view a lo Front view lap Outdoor unit NOTE The top of any pile around the outdoor unit should at least 800mm OO below the top of unit If not please install mechanical air discharge equipment AAA S op 3 3 3 cman AAA a 1 Refrigerant piping connection is inside the outdoor i unit please remove the front clapboard oi Ers Ze d 2 The piping can be led through the down left of the Outdoor unit 2 outdoor unit or the soleplate gap o 2 2 2 2 3 When through the front piping is led by wiring from 4 E E 3 gS a the panel then connect branch pipes towards left 4 g or right 4 When through the soleplate gap install the branch lt Module installation chart gt pipe towards left right or back e Single module NOTE No connection with gas and oil balance pipes for single module Liquid pipe bo AS y Gas pipe To liquid side pipe Flaring nut NOTE Pipe siz
8. leaking refrigerant All the refrigerant has leaked Calculate the critical thickness through following steps and take necessary actions 1 Calculate the sum of the charge volume A kg Total refrigerant volume refrigerant volume when delivered 13 kg superaddition 2 Calculate the indoor cubage B m as the minimum cubage 3 Calculate the refrigerant thickness A kg B m Countermeasure against overhigh thickness 1 Install mechanical ventilator to reduce the refrigerant thickness under critical level ventilate regularly 2 Install leakage detector alarming device related to mechanical ventilator if you can not regularly ventilate lt Critical thickness 0 3 kg m b Leakage detector alarming device related to mechanical ventilator Indoor unit D SS a Ventilation peristome Leakage detector alarming device should be installed in places easily keeping refrigerant TURN OVER TO CUSTOMER The owner s manuals of indoor unit and outdoor unit and Service manual must be turned over to the customer O Particularize the contents in the owner s manual to the customers 0 Dimension and the quantity of electric wire 0 75mm lt 500m RVVP 0 75mmk 2 Signal wire of indoor outdoor unit adopts 2 core shielded wire which has polarity For least interference the closed ends of shield wire should be connected continuously and the shielding layer should be connected to the end E on outdoor termin
9. the indoor unit power supply of one sy stem into the sam e cir cuit O Please pu tthe conne ctive wiring system be tween indoor unit and outdo or unit with refrigeran t piping system tog ether 0 Itis su ggested to use 2 core shielded wire ass ignal wire between indoor and outdoor units mu Iti core wire is una vailable O Pleas e com ply with relevant Natio nal E lectric Stan dard Power wiring sho uld be done by profess ional ele ctrician POWER WIRING lt Outdoor unit gt 0 Separate Power Supply without power facility See table below Min Power wire diameter mm Manual switch Power Wiring of mental and synthetic resin A 380V 3N 25 46 16 29 16 50 mu A as D I 3678 paja YDMH 252C35B YDMH 280C35B YDMH 335C35B YDMH 400C35B YDMH 450C35B Note S elect po wer cord for these five models separa tely a ccording to rele vant sta ndard YDMH 252C35B YDMH 335C35B YDMH 450C35B YDMH 280C35B YDMH 400C35B Note The wiring diameter and the lengthin the table indicate the condition that the voltage dropping range is within 29 If the length exceeds the above figure please se lect the wire diameter a ccording to relevant standard H Outdoor unit 4 Leakage Manual power supply protector switch 380V 3N Y 50Hz Lea kage D AN protector Outdoor unit GND Manual switch
10. 4 Subordinate indoor units of pipe 7 are 6 9 totel HP is 5 5 5 4 19P lt 28P pipe size is 28 01 model of branch joint h YDSA RD102 5 Subordinate indoor units of pipe 6 are 5 9 totel HP isS 5 5 5 4 24P lt 28P pipe size is 35 0 model of branch joint g YDSA RD102 6 Subordinate indoor units of pipe 5 are 4 9 totel HP is5 5 5 5 5 4 29P lt 34P pipes size is DI model of branch joint f YDSA RD102 7 Subordinate indoor units of pipe 4are 3 9 totel HP is5 5 5 5 5 5 4 34P lt 34P pipe4size is DI model of branch joint e YDSA RD102 8 Subordinate indoor units of pipe 3are 2 9 totel HP is5 5 5 5 5 5 5 4 39P lt 48P pipe3size is DI model of branch joint d YDSA RD103 9 Pipe2 is the main pipe the size of pipe2 and branchc refer to the outdoor unit pipe3size is DI model of branch joint c YDSA RD103 Note Y type branch joint a b must be the level laying otherwise can cause the cold intermediary assignment to be uneven And multi Taiwan parallel outdoor unit must be in the identical altitude Length and Drop Height Permitted of the R efrigerant piping Permitedvaiue Total Pipe Length Actual D gt 30HP a b c d e f g h i Max Piping u Actual Length ax Piping L Equivalent Length L1 L3 L4 L5 L6 i Piping farthest from the first line 40m L3 L4 L5 L6 i pipe branch Equivalent Length 1 l Indoor Outdoor Unit OuoorUntUp 70m S Drop Hegne ouor imtoo a0m 7 Indoor Unitto Indoor Unit
11. al block 5 core shield wire is used for wire controller terminals A B C D and E The controlling between indoor and outdoor units is realized by RS485 communication and the address is set while installation CAUTION Signal wire of indoor outdoor unit and wiring of wire controller belong to low voltage circuit which should not contact power cord with high voltage DE COMMISSIONING DISMANTLING amp DISPOSAL This product contains refrigerant under pressure rotating parts and electrical connections which may be a danger and cause injury All work must only be carried out by competent persons using suitable protective clothing and safety precautions LE A A Read the Manual Risk of electric shock Unit is remotely controlled and may start without warning Isolate all sources of electrical supply to the unit including any control system supplies switched by the unit Ensure that all points of electrical and gas isolation are secured in the OFF position The supply cables and gas pipework may then be disconnected and removed For points of connection refer to unit installation instructions Remove all refrigerant from each system of the unit into a suitable container using a refrigerant reclaim or recovery unit This refrigerant may then be re used if appropriate or returned to the manufacturer for disposalUnder No circumstances should refrigerant be vented to atmosphere Where appropriate drain the refrigerant o
12. e following table when without power facilities depends on the outdoor unit it connecting to 2 See table below when there is power facility depends on the total horsepower Total horsepower capacity of manual switch and fuse table below Manual Total Hp switch A Fuse A Manual switch a S Branch box 1 Set refrigerant piping system signal wires between indoor indoor unit and that between outdoor outdoor unit into one system 2 Please do not put the signal wire and power wire in the same wire tube keep distance between the two tubes Current capacity of power supply less than 10A 300mm less than 50A 500mm 3 Make sure to set address of outdoor unit in case of parallel multi outdoor units O Signal wire of indoor outdoor unit adopts 2 core shielded wire 0 75mnrt which has polarity please connect it correctly Signal wire of indoor outdoor units Outdoor unit Outdoor unit Outdoor unit Outdoor unit main unit auxil unit auxil unit auxil unit 4 ad ke gt d mn H1 H2 E HL H2 E H1 H2 E Signal wire between outdoor units All shield terminals of shield wires connect to COMM terminal E d d To closed end of shield wire indoor unit gt moe ee ER ndoor outdoor O Power cord units Group control la ocn ei Power wire diameter ne Mana KE Open EE Size e Capaciy Fuse 35 50m Non auxil Single phase All heater 220V
13. e of model 8HP 10HP and 12HP To gas balence pipe 5 Low pressure liquid side 6 12 7 gas side d 25 4 eist gece Pipe size of model 14HP and 16HP liquid side dh 15 88 gas side 35 0 No connection with gas balance pipes for single module To gas side pipe Table2 Pipe size andconnection of single modult and Branch joint Model Gas side Liquid side Branch joint YDMH 252C35B 25 4 912 7 YDSA RD101 i YDMH 280C35B 925 4 912 7 YDSA RD101 YDMH 335C35B 925 4 912 7 YDSA RD101 YDMH 400C35B 35 0 15 88 YDSA RD102 YDMH 450C35B 35 0 915 88 YDSA RD102 Table3 Size of Multi T aiwan pipe and branch pipe HorespowerA HP 16 lt A lt 28 38 0 gt 19 0 28 lt A 34 42 0 22 0 _Yosa RD103__ 34 lt A lt 48 45 07 6 22 0 YDSA RD104 48 lt A lt 64 p 54 07 025 4 YDSA RD104 Note the distance between a outdoor unit and the other which is farthest from it is less than 90 meters The main pipe may be the smaller level Two modules 1 18HP lt ca pacity lt 28HP 12 7 15 9 Liquid pipe 19 0 Gas pipe 938 0 25 4 35 0 Gas liquid side Y Three Contacts YDSA RD102 2 28HP lt ca pacity lt 32HP Liquid pipe 22 0 Gas pipe 42 0 Gas liquid side Y Three Contacts YDSA RD103 i 3 Connection of gas balance pipes NOTE Wrap the valves with wet cloth when welding or the valves may be l damaged to cause leakage C Gas blance pipe I Gas blance pip
14. ell O Three modules 1 32HP lt capa city lt 48HP 12 7 15 9 19 0 22 Liquid pipe 22 38 0 9 42 0 Gas pipe 15 0 B 25 4 35 0 Liquid side Y Three Contacts A 2 022 insite diameter 25 0 Inside diameter 2 0127 egen 4 180 inside ameter 22 0 Gas side Y Three Contacts B 054 06 p Inside diameter 180 Inside diamete 45 0C H Note liquid a as side Y type three Contacts above YDSA RDO1 2 Connection of gas balance pipes Gas balance pipe 1 15 9 Y Gas balance pipe 2 619 0 Z connecting with gas pipe 3 15 9 See following chartfor size of T shaped pipes Z Y Fo ur modules C1 48HP lt ca pacity lt 64HP 12 7 15 9 Ll 19 0 22 gt E EZ 925 4 35 0 38 0 4 42 0 3 19 0 Z A A Liquid pipe 25 45 0 P Gas pipe 54 2 Connection of gas balance pipes Gas balance pipe 1 15 9 Y Gas balance pipe 2 19 0 Z Table 4 Size of main pipe A Capacity of all the indoor units
15. he following place or malfunction of the machine may be caused There is combustible gas leakage There is much oil including engine oil ingredient O There is salty air surrounding near the coast O There is caustic gas the sulfide existing in the air near a hotspring A place the heat air expelled out from the outdoor unit can reach your neighbor s window A place that the noise interferes your neighbors every day life A place that is too weak to bear the weight of the unit Uneven place Insufficient ventilation place Near a private power station or high frequency equipment 6 A place with strong electromagnetic interference 2 The insulation of the metal parts of the building and the air conditioner should comply with the regulation of National Electric Standard Dee PEONES Outdoor unit Name Qty Outline Function kal Esc Given to users Given to users Gi Outdoor unit installation manua Outdoor unit owner s manua Indoor unit owner s manual Service manual guarantee and bar code inside Given to users o GL Ets Straight screwdriver Gauge joint 90 elbow For airtight test Pipe connecting m o S b on D Q CARRY IN THE OUTDOOR UNIT 1 Carry in with steel wire e Sling the outdoor unit and carry it in with 4 steel wire 6mm or more e Use soft board to protect the unit surface from scratch and distortion where contact
16. il from each system into a suitable container and dispose of according to local laws and regulations governing disposal of oily wastes Packaged unit can generally be removed in one piece after disconnection as above Any fixing down bolts should be removed and then unit lifted from position using the points provided and equipment of adequate lifting capacity Reference MUST be made to the unit installation instructions for unit weight and correct methods of lifting Note that any residual or spilt refrigerant oil should be mopped up and disposed of as described above After removal from position the unit parts may be disposed of according to local laws and regulations Johnson WN Controls E II YDS C 0907 oo EEES
17. me system should be located in the same level 1288 1100 Q z 91421 Bul oo9 wean q Y ks 2 Sy E P d IM Ee a BR VEO DES S MO DOSHO NO e i e Chen Geh e a S 4 sess e e e mmm mmm TC gt as nnnnnan sssesgees YOJIMS emp 1907 SPOMN YOjIMS Jelp 1 MOd JOOPINO yojims Jelp SsS9Jppy 100p NnO L e eg Fe eg e e gt em beem bg et Ae bg eg kel eg et Je eng eg Je eg eg e ng rn n bd beet e em be Ae e eg bel e ent eg et nt Te eg rg mg e Eng eng bg e E Aiddns samod aseyd 1777 7777 a paniesey WY I ZIS ue aelae PAS SAS ZAS ue JOOpUl JOSUUOD 100p NO Dou l H Lid ri 1X H vesgnd paxy Z o Uotaod Lem 8d EN EN EN Te LKA d y l l l l l l l jar em d d d d lt lel H eeeh Si maang ame E l l l Sch I saseal p jun JOOpyNo jo Ap l l l l l l aad yovla 311HM i zB S eH me pd iS a 7H EAS YAS GAS me 1018 WWOO diyo IH i E j f y 10119 WWO GO i o ol 10119 S 4ppe Jun JOOpINO sosa lin wegl lw aBsefosip jey6ig Yum sou ZE duer JOOPINO H ma Josuas ulem ym 1013 L ajn e gt a fo f Z WEN NIEL IHM 03 og WAT N3389 M0T13A N3389 M0T134 melen Vo uonoajoud juang Ld menga 1y 1asuapuoo 100pnO Gd uoyosjoid tua eBieyosip sossaidwog bd
18. nt piping After the installing refrigerant piping do not electrify the indoor unit before the airtight test and vacuum AIRTIGHT TEST e Refrigerant piping must be tested for gas proof 3 8MPa 40kgf cm nitrogen e Vacuum pump must be used and vacuuming should be done from the gas side and liquid side simultaneously ADD REFRIGERANT e When the actual pipe is longer than the fiducial length the added refrigerant volume of every outdoor unit depends on the calculating according to the actual length e Fill the form on the outdoor unit electric control box with the added volume length of pipes actual length and the relative height drop between outdoor unit and indoor unit e Choose power capacity and wire diameter according to the design manual The power cord of the air conditioner should be wider than the power cord of ordinary motor e Do not twist or cross the power cord 380V 3N with wiring low voltage between indoor and outdoor unit or mishandling may occur e Connect the indoor unit to the power after airtight test and vacuuming O Set the address of outdoor unit see Address dial of outdoor unit TEST RUNNING Remove six sponges at the back of unit Please handle with care to avoid damage to fin which will decrease heat exchanging efficiency eThe test running can not begin until the outdoor unit has been connected to the power for 12hr INSTALLATION LOCATION 1 Please keep away from t
19. po Gg Outdoor unit GND H ay 7 ll Outdoor unit GND AA a la a O Sc Outdoor unit GND i Outdoor unit Sen D Branch box Ltn Outdoor unit Bon D 0 With power facilities pais with leakage protector b Lea kage E protector Manual switch GND a JJ GND HAS utdog unit olon Branch box A b B Fr Y GND O Y GND O Outdodr unit 8 GND 0 Select the wire diameter Powe r wiring refer to the main wire a connecting to branch box and the wiring b be tween branch boxa nd power facilities Plea se se lect the wire diameter ac cording to the following re quirement 1 Di ameter of main wire a Depen ds on the total horsepo wer of outdoor unit and following table E g In syste m 5H pX 1unit 8Hp X 1unit 10Hp X 1 unit Total Hp 23Hp Table siz e of w ire 70 mm within 50m 2 W iring b between branch box and power equipment Depends on the number of combined outdoor unit If fewer than 5 th e dia meter is the same as t hat of main wire a if more than6 there will be 2 el ectric co ntrol boxes a nd the diameter of wiring depends on the total horse power of outdoor units connecting to each elec tric control box and following table Select wire diameter table unit mm Select the capacity of manual switch and fuse of the branch box 1 Se
20. ructions Display content CT M e E Normal dispay Normaldisplay o y 1 ADDRofoutdoorunit 01234 4 Totalcap of outdoor units ______ _ 6 Cap REQT of main unit after correction Effective to main unit 7 Running mode 0 1 2 3 4 8 Actual running cap ofoutdoorunit TI 9 Fanspeed 10 T2average Actual value _16 Current inverter compressor_____ _ Actualvalue __18 Current No 2 fixed compressor TU Actualvalue 19 Opening degree electronic expansion valveA Actual valuex8 Actual value X 8 The last error or protection code Laa o Endofqery Normal display Display aty of indoor units which communicate with outdoor unit on standby mode In case of cap requirement display running frequency of compressor Running mode OFF 0 OFF 1 FAN 2 COOL 3 HEAT 4 Constraint cool Fan speed 0 OFF 1 LOW 2 HIGH PWV opening pulse count displayed value x 8 Sw1 Sw2 network ADDR setting switch Sw3 constraint cool button Sw4 query button Sw5 Set lock mode switch The outdoor unit of 8Hp 10Hp and 12Hp exclude the part in broken line circle and relevant wiring including the wiring with CT2 current inductor and HEAT2 on nameplate EI ON OR ON Pattern d d fH te lockin COOL HEAT AUTO Address higher than 3 ineffective address error occurs e Distance between ground bolt is shown below Note Outdoor units in the sa
21. the steel wire e Remove the transportation board after carrying in the outdoor unit 2 Carry in with a fork lift Chassis Hole site for fork lift INSTALLATION SPACE 5 If through the front please remove the clapboard 1 Leave enough space for maintenance see following at corresponding place first picture and install power unit on the side of outdoor unit Refer to power unit installation manual 2 Keep the modules in one system at the same level Ee Air out S DES EA CAUTION To prevent the inside of piping from oxidizing when welding it is necessary to charge nitrogen or oxide may block the circulation Air in M Air in ES i F OUTDOOR UNIT COMBINATION Diet 32 60 12HP 16HPx3 1GHP 16HP LOHP X 2 14HP o ERIC 32 O r Led e el PIPE SIZE AND CONNECTION Side BE Outdoor unit planform 2 When there is obstacle above the outdoor unit Installation and maintenance surface Qty of Qty of ees e 8 supxi 13 32 3 OHP 14HP 16HP 4 12HP X1 T6HP Xx 2 10HP 4 14 damBwxt 16 44 16HPx2 12HP 4 16 14HP 16HP X 2 J E GG P 10HP 16HP X3 3 20 HP 10HP SE 8 gt 1000mm 22 FOE 12HP X 3 16HP gen 00m Mim 00mm im F Ge
22. wl YORK ce ENGLISH E 11 YDS C 0907 INSTALLATION MANUAL DIGITAL SCROLL CENTRAL AIR CONDITIONER OUTDOOR UNIT YDS SYSTEM R410A Model YDMH 252C35B YDMH 280C35B YDMH 335C35B YDMH 400C35B YDMH 450C35B i f For correct installation read this manual before starting installation Only trained and qualified service personnel should install repair or service air conditioning equipment Users should not install the air conditioner by themselves All pictures are only sketches If there is any difference between pictures in this manual and the actual shape of the air conditioner you purchased the actual shape shall prevail PRECAUTIONS This installation manual is for the outdoor unit Refer to the indoor unit installation manual for indoor parts installation Please read the power source unit installation manual to install the power source unit Please refer to the refrigerant distributor installation manual to install the refrigerant distributor KEY POINTS IN INSTALLATION e Confirm the model and name of your air conditioner to avoid installation mistakes REFRIGERANT PIPING Separately purchased refrigerant distributor branch joint branch header pipe should be used in the process of refrigerant piping e Refrigerant piping should accord with specified diameter e Charge nitrogen under certain pressure in the refrigerant piping before welding O Heat insulation should be done to refrigera
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