room air conditioner inverter split type - installation manual
Contents
1. holes in the wall according to the wall structure and corresponding mounting points on the installation plate The installation plate provided with the machine is differrent according to the models Dimensions are in mm in unless otherwise stated 2 Drill a hole in the wall 1 Determine hole positions according to the diagramdetailed in Fig 5 Drill one 1 hole 65mm 2 6in slanting slightly to outdoor side 2 Always use wall hole conduit when drilling metal grid metal plate or the like Correct orientation of Installation Plate Indoor unit outline Left rear side refrigerant rani rear side PpS nal pipe hole 65 2 6 ipe hole Model A A 710 28 B 250 9 8 C 100 3 9 D 110 4 3 Model B A 790 31 1 B 265 10 4 C 100 3 9 D 150 5 9 292 11 5 Left rear sid refrigerant pipe hole b i i Right rear side S gt 21 refrigerant CN i pipe hole mp 065 2 6 920 36 2 Model C Indoor Unit Outline 998 39 3 Model D Fig 5 Wall Outdoor Indoor au D 5 7mm Fig 6 INSTALLATION INSTRUCTIONS 3 Connective Pipe and Drainage Installation Drainage Run the drain hose sloping downward Do not install the drain hose as illustrated in Fig 7 When connecting extension drain hose insulate the connecting part of ext2. during the heating mode Refrigerant pipe connection 1 Flaring work Main cause for refrigerant leakage is due to defect in the flaring work Carry out correct flaring work using the following procedure A Cut the pipes and the cable 1 Use the piping kit accessory or pipes purchased locally 2 Measure the distance between the indoor and the outdoor unit 3 Cut the pipes a little longer than the measured distance 4 Cut the cable 1 5m longer than the pipe length B Burr removal Completely remove all burrs from the cut cross section of pipe tube Put the end of the copper tube pipe ina downward direction as you remove burrs in order to avoid dropping burrs into the tubing ie R Fig 14 Seal Drain join sg TN Seal Drain pipe A Fig 15 TS Fig 16 Pipe Reamer Point down Fig 17 Base pan hole of outdoor unit xX Oblique Rou a ghness Burr a 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 Firmly hold copper pipe ina die in the dimension shown in the table below Outer diam A mm in Fig 18 Mm in Max Min 6 35 1 4 1 3 0 05 0 7 0 03 9 52 3 8 1 6 0 06 1 0 0 04 12 7 1 2 1 8 0 07 1 0 0 04 16 5 8
3. wiring 7 Use lock nuts to secure the conduit tubes Front Panel cover Terminal block of indoor unit Electrical box Indoor unit DQIQ LN S Q Q QO 8 Poer 8 S SV supply UP AN S 1 ol Lol To Tel Tel Outdoor unit ModelA Indoor unit Indoor unit x AAA EAA u2 SO lt QQQ Power supply Outdoor unit Outdoor unit Model B Fig 22 Outdoor unit Terminal block 0 Ver 7 3 wA 0mm Cover control Conduit panel Connecting cable Power supply cord Fig 23a Warning 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 sure 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 Special branch circuit breaker Select the suitable Fuse Breaker Note To prevent wires loosening or leaving the Cord Clamp please s
4. with a clicking 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 D The design and specifications are subject to change without prior notice for product improvement Consult with the sales agency or manufacturer for details
5. 2 2 0 09 2 0 0 08 Copper tube Handle E Pipe length A Max Length Max drop Model C2P city of refrigerant height Btu h pipe m ft m tt 25 82 10 32 8 inverter gt 15000 lt 24000 30 98 20 65 6 split air gt 24000 lt 36000 50 164 25 82 Fig 19 condtioner gt 36000 lt 60000 65 213 30 98 R410A lt 15000 Tightening Connection 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 Pris enemas Acar eane 6 35 1 4 19001328 1600 141 59 Fig 20 9 52 3 8 2500 221 34 2600 230 02 12 7 1 2 3500 309 73 3600 318 56 1658 4500 998 28 4700 415 93 Caution Excessive torque can break nut depending on installation conditions Electrical work 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 surge protector and main power switch with a 1 5 times capacity of Max Current of the unit should be installed in power circuit Ensure the air conditioner is grounded well 4 The appliance shall be installed in accordance with national wir
6. Before using your air conditioner please read this manual carefully and keep it for future reference INVERTER SPLIT TYPE ROOM AIR CONDITIONER bid XK ALAN N CONFORTFRESH AIR CONDITIONING INSTALLATION MANUAL Please read this installation manual completely before installing the product If the power cord is damaged 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 Contact an authorised service technician for repair maintenance or installation of this unit CONTENTS SAFETY PRECAUTIONS Warning s cciviiwenini ty viene A ene ei ee een ERER eerie ener 2 CAUTION E E E E A EA E E E N E A EE A 2 INSTALLATION INSTRUCTIONS selecting installation plaC nsiru aE a ide ee E a Eai 3 ACCESSONES oirescsase nasaian aiian a t i a a aaa EN aa a a a a iaa a idaan 4 indoor unit installations n a a a E A E E Ra aa 5 Qutdoor UNIT INStAN ATION a a a a a a a a E a aE e aaa 7 REFRIGERANT PIPE CONNECTION Refrigerant pipe COMMECTION sarsrencoisi siinon a a AAAA K NASENNE RAA RANTA A 8 ELECTRICAL WORK Electrical WONK cernita a E a E a AE a 9 AIR PURGING Air purging with VACUUM PUMP ecrreranroirerennriiini rii E ATRA EE RE RA 11 Safety and leakage Check s c ccisicscsleateeacete let lath teens Maca ecepieseetbauiysesepuccertassenentedeieseteanninati seen 13 TEST RUNNING TO St CUMING EAA E OO
7. ER i loca E A ET 13 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 e 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 e Installation work must be performed in accordance with the national wiring Standards by authorised personnel only SAFETY PRECAUTIONS e 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 Installation must be performed in accordance with the requirement of NEC and CEC by authorized personnel only e Incorrect installation due to ignoring of the instruction will cause harm or damage The seriousness is classified by the following indications A WARNING This symbol indicates the poss
8. Wiring routing must be properly arranged so that control 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 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 O accumulates at surrounding of the unit it may cause fire 3 Carry out drainage piping as mentioned in installation instructions If drainage is not perfect water may enter the room and damage the furniture A INSTALLATION INSTRUCTIONS Selecting installation place Selectan installation location which is rigid and strong enough to supportor hold the unit and selecta location foreasy maintenance Read completely then follow step by step Indoor unit Do not expose the indoor un
9. acuation 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 Refrigerant Outdoor Indoor unit A Gas side ge q gt K B Packed valve Half union Liquid side q A D Fig 24 Flare nut A Valve body i Ss Valve stem Fig 25 Manifold valve Compound meter Pressure gauge i Vacuum pump r EN Low pressure valve 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 42 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 ele
10. ctrical 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 a soap water or aliquid neutral detergent on the indoor unit connection or outdoor unit Indoor unt p lc connections by a soft brush to check for leakage ae poimi of the connecting points of th piping If bubbles come out the pipes have leakage Cover 4 m 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 operatiomafter completing gasleak check attheflarenutconnections and electrical safety check Check that all tubing and wiring have been properly connected e Check that the gas and liquid side service valves are fully open 1 Connect the 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 62 F 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
11. elect a place where noise vibration and hot air Te More than 30cm Qe 111 8in More than 60cm 23 6in Right Do not install in aplace full of machine oil or sulfide e ifthe 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 6in Flaring tool set Specified torque wrenches 1 8kgf m 4 2kgf m 5 5kgf m 6 6kgf m different depending on model No Spanner half union Hexagonal wrench 4mm Gas leak detector Vacuum pump Gauge manifold Users manual Thermometer Multimeter Pipe cutter Measuring tape INSTALLATION INSTRUCTIONS Accessories Number Name of Accessories Q ty 1 Installation Plate 1 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 fdeids 6 35 1 4in 6 pipe q 9 52 3 8in Parts you must purchase Assembly Consult the dealer about 9 52 3 8in the pipe size Gasside 42 7 1 2in 16 5 8in 7 Remote controller 1 8 Self tapping Screw B ST2 9X10 Optional 2 t 9 Remote controller holder Aia 1 Transfer connector Pac
12. elect proper cord diameter to fill the holes on the cord clamp Terminal block of outdoor unit Outdoor unit Power supply Indoor unit ModelA Outdoor unit aalala Pie S Uy S OQ S m ol Power EEK PR L L2 5 amp D O Indoor unit Model B Fig 23b AIR PURGING 7 CAUTION N 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 vibrations 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
13. ension drain hose with a shield pipe do not let the drain hose slack Connective pipe installation 1 For the left hand and right hand piping remove the pipe cover from the side panel For the rear right hand and rear left hand piping install the piping as shown Fix the end of the connective pipe Refer to Tightening Connection in REFRIGERANT PIPING CONNECTION Indoor unit installation Pass the piping through the hole in the wall Put the 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 hooked see Fig 10 amp Fig 11 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 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 a h Do not block water flow by a rise Right hand piping Left hand piping Fig 8 Fig 7 Rear Do not put the end of drain hose into water left piping Fig 9 Upper Hook Lower Hook Fig 10 Fig 11 _ Cushioning material INSTALLATION INSTRUCTIONS 5 Piping and wrapping Bundle the tubing drain hose with tape securely evenly as shown in Fig 12 Because the condensed water from rear of the indoor unit is gath
14. ered in ponding box and is Indoor unit Ponding box piped out of room Do not put anything else in Pipe room the box Connective 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 Figa back of the indoor unit Be careful not to let the drain hose slack e Heat insulated 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 Fig 13 wall or using a dust or shield plates f 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 concrete or the same
15. ibility of death or serious injury b A CAUTION This symbol indicates the possibility of injury or damage to property m The items to be followed are classified by the symbols Symbol with background white denotes item that is PROHIBITED from doing Z WARNING 1 Engage dealer or specialist for installation If installation done by the user is defective it will cause water leakage electrical shock or fire 2 Install according to this installation instructions strictly If installation is defective it will cause water leakage electrical shock or fire 3 Use the attached accessories parts and specified parts for installation otherwise it will cause the set to fall water leakage electrical shock or fire 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 orfire 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
16. ing regulations Do not operate your air conditioner in a wet room such as a bathroom or laundry room 5 An all pole disconnection device which has at least 3mm clearances in all poles and have a leakage current that may exceed 10mA the residual current device RCD having a rated residual operating current not exceeding 30mA and disconnection must be incorporated in the fixed wiring in accordance with the wiring rules 6 For the unit adopts auxiliary electric heater keep atleast 1 meter away from the nearest combustible materials 7 According to the attached Electrical Connection Diagram located on the panel of the indoor amp outdoor unit to connect the wire All wiring must comply with local and national electrical codes and be installed by qualified and skilled electricians 8 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 ELECTRICAL WORK Suggest Minimum Wire Size AWG American Wire Gage Appliance Amps AWG Wire Size 10 18 13 16 18 ta 25 12 30 10 40 8 NOTE e The wire size of power supply cord and interconnected wire 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 wire size fuse or switch The controller
17. 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 REFRIGERANT PIPE CONNECTION Settlement of outdoor unit Anchor the outdoor unit with a bolt and nut 100r 8 tightly and horizontally on a concrete or rigid mount Outdoorunitdimension Mountingdimensions mm in WxHxD A mm in B mm in 700x540x240 29 5x21 3x9 4 458 18 250 9 8 685x430x260 27x16 9x10 2 460 18 1 276 10 9 780x540x250 30 7x21 3x9 8 549 21 6 276 10 9 760x590x285 29 9x23 2x11 2 530 20 9 290 11 4 845x700x320 33 3x27 6x12 6 560 22 1 335 13 2 810x558x310 31 8x21 9x12 2 549 21 6 325 12 8 670x540x265 26 4x21 3x10 4 481 18 9 276 10 9 J Drain joint installation NOTE The drain joint is slightly different according to the different outdoor unit For the drain joint with the seal Fig 15 A first fit the seal onto the drain joint then insert the drain joint into the base pan hole of outdoor unit rotate 90 to securely assemble them To install drain joint as shown in Fig 15 B insert the drain joint into the base pan hole of outdoor unit until it 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 outdoor unit
18. it to heat or steam Select a place where there are no obstacles in front or around the unit Make sure that condensation drainage can be conveniently routed away Do not install near a doorway Ensure the spaces indicated by arrows from the More than 15cm 5 9in to the ceiling More than More than 12cm 4 7in 12cm 4 7in lt gt gt More than 2 4m 7 9ft wall ceiling or other obstacles from the floor Aplace where noise prevention is taken into consideration Aplace 1m or more to TV or radio instrument A place where air circulation in the room is good Fig 1 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 If an awning is built over the outdoor unit to prevent direct sunlight or rain exposure make sure that heat More than 30cm 11 8in radiation from the condenser is not restricted Keep the spaces indicated by arrows from wall or other obstacles air inlet or outlet discharged will not be an issue gas such as hot spring resort e Do not install ina saline place such as coast Do not install in a place where there are high frequency machines such as wireless equipment welding machine or medical facility Rooftop installation Do not place animals and plants in the path of the Take the air conditioner weight into account and s
19. ked with the indoor unit used for multi type models only 1 10 NOTE Pipe size differ from appliance to appliance on some models To meet different pipe size requirement sometimes the pipe connections need the transfer connector to install on the outdoor unit 11 Air freshening filter used to install on the Air filter 1 for some models only Note Except the above parts provided the other parts needed during installation you must purchase e Use a stud finder to locate studs to prevent unnecessary damage to the wall CAUTIO e A minimum pipe run of 3 metres is required to minimise vibration amp excessive noise e Two ofthe A B and C directions should be free from obstructions This illustration is for explanation purposes only Copper lines must be insulated independently O LUT UU VV re Additional drain pipe S k DB Ej a S D INSTALLATION INSTRUCTIONS Indoor unit installation 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 wallis made of brick concrete or the like drill five or eight 5mm 0 2in diameter holes in the wall Insert Clip anchor for appropriate mounting screws 3 Fit the installation plate on the wall with five or eight type A screws Note Fit the Installation Plate and drill
20. of refrigerant to be charged length method Less than 7 5m 25ft Use vacuum pump Liquid side 6 6 35mm 1 4in Liquid side 9 52mm 3 8in More than 7 5m 25ft Use vacuum pump R410A HON Pipe length 7 5 25 x15g m 0 160z ft Pipe length 7 5 25 x30g m 0 320z ft AIR PURGING When relocate the unit to another place perform evacuation using vacuum pump 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 e 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 charge 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 ev
21. of the air conditioner designed with a fuse protection function under abnormal conditions the specifications of the fuse have printed on the circuit board such as T3 15A 250VAC T5A 250VAC etc 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 Lift the indoor unit panel up remove the electrical box cover by loosening the screw as shown in Fig 22 3 Connect the connective cables to the terminals as identified with their respective matched numbers on the terminal block of indoor and outdoor units Forexample terminal L1 of outdoor must connect with terminal L1 on the indoor unit 4 Wrap those cables 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
22. 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 C conductors Air purging NOTE Connective pipe length will affect the capacity and energy efficiency of the unit The nominal efficiency is tested basing on the pipe length of 7 5m 25ft Air and moisture in the refrigerant system have undesirable effects as indicated below Pressure inthe 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 unitand tubing between the indoor and outdoor unit must be leak tested and evacuated to remove any noncondensables and moisture from the system Air purging with 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 Pipe length and refrigerant amount i i A F Connective pipe Air purging Additional amount
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