INSTALLATION MANUAL DVM PLUS III RVXVHT G Series RVXVRT G Series

INSTALLATION MANUAL DVM PLUS III RVXVHT G Series RVXVRT G Series System Air Conditioner (Cooling and Heating) E DB98-29412A(2)

safety information SAFETY INFORMATION Before installing an air conditioner, please read this manual thoroughly to ensure that you know how to safely and efficiently install a new appliance. DVM PLUS III air conditioner uses R410A refrigerant. - When using R410A, moisture or foreign substances may affect the capacity and reliability of the product. Safety precautions must be taken when installing the refrigerant pipe. - The designing pressure of the system is 4.1MPa. Select appropriate material and thickness according to the regulations. - R410A is a quasi-azeotrope of two refrigerants. Make sure to charge with liquid phase when filling refrigerant. If you charge gaseous refrigerant, it may affect the capacity and reliability of the product as a result of change formation of the refrigerant. Connect the indoor units for R410A refrigerant. Check whether the indoor units can be connected with the product s catalogue. (When incorrect indoor units are connected, they cannot operate normally.) SEVERE WARNING SIGNS If you don t follow the safety precautions, you may get the risk of serious wound or death. The installation must be done by the manufacturer or its service agent or a qualified person in order to avoid a hazard. Installation by an unqualified person may cause a water leakage, electric shock or fire and so on. The electric work must be done by service agent or qualified persons according to national wiring regulations and use only rated cable. Use certified power cable in the market suggested here and do electric work according to installation manual otherwise, electric shock or fire may occur. Install the outdoor unit correctly according to the installation manual. An incorrect installation may cause a water leakage, electric shock or fire and so on. Manufacturer is not responsible for accidents due to incorrect installation. When installing the unit in a small room, take measures in order to keep the refrigerant concentration from exceeding allowble safety limits in the event of a refrigerant leak. Excessive refrigerant concentration in a closed room can lead to oxygen deficiency. Use certified parts in the market and supplied parts from the factory. If you don t use the certified parts and tools, it can cause trouble to the air conditioner and bring into injury. Install the outdoor unit on a hard and even place that can support its weight. If the place cannot support its weight, the outdoor unit may fall down and it may cause injury. Fix the outdoor unit securely on foundation to resist strong wind or earthquake. If the outdoor unit is not properly fixed, it turns over and accidents may occur. Fix power cable on fixture of outdoor unit securely not to be pulled out by external force. If fixing is incomplete, it can cause trouble with a heat generation, electric shock or fire and so on. 02_ safety information

CAUTION SIGNS Arrange the cables between the indoor and outdoor unit after connecting. Attach the cover securely so that the electrical component box cover does not get loosen. If the cover is attached incompletely, it can cause trouble with a heat generation, electric shock or fire of the terminal board. Install MCCB and ELB according to installation manual. If you do not install the MCCB and ELB, electric shock or fire may occur. The unit must be plugged into an independent circuit if applicable or connect the power cable to the auxiliary circuit breaker. An all pole disconnection from the power supply must be incorporated in the fixed wiring with a contact opening of >3mm. If any gas or impurities except R410A refrigerant come into the refrigerant pipe, serious problem may occur and it may cause injury. Make sure that there is no leakage after installation. Toxic gas may generate when refrigerant gas contacts with fire. Leak test must be done using only Nitrogen gas. If you don t follow the safety precautions, you may get the risk of injury or loss of property. Make sure of a earthing. Do not connect the earth wire to the gas pipe, water pipe, lighting rod or telephone wire. If earthing is incomplete, electric shock or fire may occur. Do not connect the heater to the outdoor unit and do not install altered duct as you please. The capacity may reduce, electric shock or fire may occur. Make sure that the condensed water dripping from the drain hose runs out properly and insulate the drain pipe so that frost does not generate. Household goods may get wet if the drain pipe is not properly installed. Install the power cable and communication cable of the indoor and outdoor unit at least 1m away from electric appliances. Noise may be generated which can affected product badly. Install the indoor unit away from lighting apparatus using the ballast. If you use the wireless remote control, it may not operate normally. Do not install the air conditioner in following places. The place where there is mineral oil or arsenic acid. Those parts may get damaged due to burned resin. The efficiency of the heat exchanger may reduce or the air conditioner may be out of order. The place where corrosive gas such as sulfurous acid gas generates from the vent pipe or air outlet. The copper pipe or connection pipe may corrode and refrigerant may leak. The place where there is a machine that generates electromagnetic waves. The air conditioner may not operate normally due to control system. The place where there is a danger of existing combustible gas, thinner or gasoline is handled. The place where carbon fiber or flammable dust is. The place where like spa and shore. safety information _03

safety information CAUTION SIGNS Install the power cable and communication cable of the indoor and outdoor unit at least 1.5m away from the electric appliances and install it at least 2m away from the cable from the lightning rod. Noise may heard depending on the electric wave though the cables. Install the outdoor unit within the angle of 25~55 depending on the building height as below table. Building height Protective angle Remarks Below 20m Below 40m 55 35 Lightning rod Protective angle: 25~55 Below 60m 25 Building Changes in DVM PLUSIII comparing with conventional models(dvm PLUSII) Use R410A refrigerant. Check indoor units, MCU, distributor kits, etc which are connected with DVM PLUS III are compatible with DVM PLUS III or not. Version of AVX E and higher is available. Make sure the combination method of outdoor units is different from DVM PLUS II. The length of maximum piping, level difference, the quantity of connectable indoor units, the installation at the outdoor joints and the outdoor unit combinations are different from the conventional models. Outdoor joint of gas side pipe should be installed horizontally due to the combination of variable units when the height of the main pipe is lower than the outlet of the pipe of the outdoor unit. The Installation of the liquid pipe and high pressure gas pipe are the same. If the pipe length between outdoor units becomes 2m or more, install vertical trap to upstream to prevent oil from getting accumulated in the pipes of the outdoor unit in case of part load operation with the states which the last outdoor unit stops operating. 04_ safety information

contents PREPAIRING THE INSTALLATION 6 6 INSTALLING THE UNIT 15 15 COMPLETING THE INSTALLATION AND COMMISSIONING 51 Shape the outdoor unit 6 Accessories 6 Optional accessories 7 Outdoor unit combination 8 Selecting proper location for installation 9 Space requirements 9 Single installation 10 Group installation 11 Moving the outdoor unit 11 Detaching fasteners 12 Installing the outdoor unit 14 Installing the drain pipe Refrigerant piping works 15 Selecting the refrigerant pipe 16 Pipe selection for DVM PLUS III 18 Pipe selection for DVM PLUS III HR 19 Temper grade and minimum thickness of the refrigerant pipe 20 Keeping refrigerant pipe clean and dry 20 Brazing the pipe 21 Cutting or Flaring the pipes 22 Aligning the pipes 23 Free piping & wiring directions 24 Connecting the outdoor unit pipe 26 Piping works among outdoor units 27 The examples of the refrigerant pipe installation 28 Piping examples 30 Installing the branch joints 33 Installing MCU 34 Connecting the pipe 35 Wiring work 35 Specifications of the circuit breaker and power cable 39 Power supply and communication cable configuration 39 Specifications of the cable tube 40 Power wiring diagram 43 Selecting compressed ring terminal 43 Connecting the power terminal 44 Power cable arrangement 45 Grounding work 46 Performing the refrigerant gas leak test 47 Vacuum drying 48 Insulating the refrigerant pipe 48 Insulating the refrigerant 48 Selecting the insulation of the refrigerant pipe 48 Insulating the refrigerant pipe 49 Insulating the branch joint 51 Charging refrigerant 51 Important information regulation regarding the refrigerant used 52 Service valve work 54 Setting the option switch & function keys 54 Option switch of the outdoor unit 55 Key function 56 MCU option switch 57 Completing the installation 59 Final checks and trial operation 59 Inspection before trial operation 59 Trial operation contents _05

preparing the installation SHAPE OF THE OUTDOOR UNIT Shape HP RVXVHT080/100/120 RVXVHT140/160 HR RVXVRT080/100/120 RVXVRT140/160 ACCESSORIES Keep supplied accessories until the installation is finished. Hand the installation manual over to the customer after finishing installation. The quantities are indicated in parentheses. Installation manual (1) Drain plug (2) Cable tie (4) Cap drain (1) Pipe accessories (Gas) (1) Remarks Pipe accessories (High pressure gas) (1) - - - - For closing the drain hole - For downsizing connection elbow RVXVRT140 RVXVRT080 RVXVHT140 RVXVHT080 - For downsizing connection elbow - Only for HR unit RVXVRT080 Optional accessories The following accessories are needed when installing the outdoor and indoor unit. Type Model Total capacity MXJ-YA1509 15.0kW below MXJ-YA2512 15.0~40.6kW MXJ-YA2812 40.6~46.4kW Y-joint MXJ-YA2815 46.4~69.6kW MXJ-YA3119 69.6~98.6kW MXJ-YA3819 98.6~139.2kW MXJ-YA4422 139.2kW and over MXJ-YA1500 23.2kW and below Y-joint MXJ-YA2500 23.2~69.6kW (Only for DVM PLUS III HR module) MXJ-YA3100 69.6~139.2kW MXJ-YA3800 139.2kW and over MXJ-HA2512 46.4kW and below (For 4 rooms) Header joint MXJ-HA3115 69.6kW (For 8 rooms) MXJ-HA3819 69.6kW and over (For 8 rooms) Outdoor joint MXJ-T3819 48HP and below MXJ-T4422 50HP and over Outdoor joint MXJ-T3100 48HP and below (Only for DVM PLUS III HR module) MXJ-T3800 50HP and over When the indoor units without EEV such as wall mounted and ceiling type are installed, it is necessary to install distribution kits. It is necessary to install MCU when HR units are installed. Distribution kits and MCU should be purchased from the factory. 06_ preparing the installation

OUTDOOR UNIT COMBINATION Make sure an indoor unit is compatible with DVM PLUSIII Indoor units can be connected within a following table range. If the total capacity of the connected indoor units exceeds the suggested guideline, the indoor unit of cooling and heating capacity may decrease. Total capacity of the connected indoor units can be allowed to be from 50% to 130% over outdoor capacity. (Depending on operation condition, the ratio of total capacity of the connected indoor units over outdoor unit capacity should be considered carefully.) 0.5x (Outdoor unit capacity) Total capacity of the connected indoor units 1.3x (Outdoor unit capacity) Up to 64 indoor units can be connected to an outdoor unit. The communication address of the indoor unit sets following the quantity of the maximum indoor unit connected. The minimum capacity of the indoor unit is 2.2kW. CAUTION Make sure to follow the table for combination installation of outdoor units. Type Outdoor unit capacity (HP) 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 Outdoor unit combination High Efficiency Nominal capacity Compact RVXVHT080GE RVXVRT080GE 1 2 1 RVXVHT100GE RVXVRT100GE RVXVHT120GE RVXVRT120GE RVXVHT140GE RVXVRT140GE 1 1 2 1 3 2 2 1 2 1 1 1 1 1 1 2 1 1 1 2 1 2 3 2 1 1 1 1 2 1 1 1 2 3 1 2 3 3 4 Cooling[kW] 22.4 28.0 33.6 39.2 44.8 50.4 56.0 61.6 67.2 72.8 78.4 84.0 89.6 95.2 100.8 106.4 112.0 117.6 123.2 128.8 134.4 140.0 145.6 151.2 156.8 Heating[kW] 25.2 31.5 37.8 44.1 50.4 56.7 63.0 69.3 75.6 81.9 88.2 94.5 100.8 107.1 113.4 119.7 126.0 132.3 138.6 144.9 151.2 157.5 163.8 170.1 176.4 Total capacity of the Minimum[kW] 11.2 14.0 16.8 19.6 22.4 25.2 28.0 30.8 33.6 36.4 39.2 42.0 44.8 47.6 50.4 53.2 56.0 58.8 61.6 64.4 67.2 70.0 72.8 75.6 78.4 connected indoor units (Cooling) Maximum[kW] 29.1 36.4 43.7 51.0 58.2 65.5 72.8 80.1 87.4 94.6 101.9 109.2 116.5 123.8 131.0 138.3 145.6 152.9 160.2 167.4 174.7 182.0 189.3 196.6 203.8 Maximum number of connectable indoor unit 13 16 19 23 26 30 33 36 40 43 46 50 53 56 60 64 64 64 64 64 64 64 64 64 64 RVXVHT080GE RVXVRT080GE 1 1 1 RVXVHT100GE RVXVRT100GE 1 1 2 1 1 1 1 1 1 1 Outdoor unit combination Nominal capacity RVXVHT120GE RVXVRT120GE RVXVHT140GE RVXVRT140GE RVXVHT160GE RVXVRT160GE 1 1 1 2 3 1 2 1 2 3 2 2 1 1 1 1 1 1 1 1 1 1 1 2 1 1 2 2 2 3 1 1 1 2 3 3 3 4 Cooling[kW] 22.4 28.0 33.6 39.2 44.1 50.4 56.0 61.6 66.5 72.1 77.7 83.3 88.2 95.2 100.8 105.7 111.3 116.2 121.8 127.4 132.3 139.3 144.9 150.5 155.4 160.3 165.9 171.5 176.4 Heating[kW] 25.2 31.5 37.8 44.1 50.4 56.7 63.0 69.3 75.6 81.9 88.2 94.5 100.8 107.1 113.4 119.7 126.0 132.3 138.6 144.9 151.2 157.5 163.8 170.1 176.4 182.7 189.0 195.3 201.6 Total capacity of the Minimum[kW] 11.2 14.0 16.8 19.6 22.1 25.2 28.0 30.8 33.3 36.1 38.9 41.7 44.1 47.6 50.4 52.9 55.7 58.1 60.9 63.7 66.2 69.7 72.5 75.3 77.7 80.2 83.0 85.8 88.2 connected indoor units Maximum[kW] 29.1 36.4 43.7 51.0 57.3 65.5 72.8 80.1 86.5 93.7 101.0 108.3 114.7 123.8 131.0 137.4 144.7 151.1 158.3 165.6 172.0 181.1 188.4 195.7 202.0 208.4 215.7 223.0 229.3 (Cooling) Maximum number of 13 16 19 23 26 30 33 36 40 43 46 50 53 56 60 64 64 64 64 64 64 64 64 64 64 64 64 64 64 connectable indoor unit preparing the installation _07

preparing the installation SELECTING PROPER LOCATION FOR INSTALLATION Decide the installation location based on the following condition and obtain the user s approval. Avoid a place that may disturb your neighbor. Noise may occur from the outdoor unit and the discharged air may run into the neighborhood. (Be careful of the operation time in a residential area) Install the outdoor unit on a hard and even area that can support its weight. Choose a flat place that rainwater does not settle or leak. Choose a place avoiding strong winds. Maintain sufficient space for repairs and service. Choose a place where you can easily connect the pipes and cables to the indoor unit. Make sure that the condensed water dripping from the drain hose runs out properly and safely. These products are not appropriate for installing in those places like shore and spa. If you want to install them in such places, you should contact company. The outdoor unit is installed in the place where there is exposed to a risk of corrosion Sea Sea breeze Outdoor unit The outdoor unit is installed in the place where there is exposed to a risk of sea breeze Outdoor unit Sea breeze Sea Choose a place where there is no direct sunlight. Choose a place where it could not come into contact with snow and rain. Choose a place where flammable gas does not leak. Choose a place where the indoor and outdoor unit can be connected with a pipe. 08_ preparing the installation

CAUTION Install the indoor unit away from any interfering sources such as radio, computer, stereo equipment and also select the place where the electrical wiring work can be possible. - Especially keep the unit at least 3m away from the electrical equipments in an area electromagnetic waves generated and install the protection tube to protect the main power cable and communication cable. - Make sure that there is no equipment electromagnetic waves generate. If not, malfunction of the control system may occur due to the effect of the electromagnetic wave. (For example: The remote control sensor of the indoor unit may not be received well of electronic lighting style fluorescent lamps, such as fluorescent lamps are in the same space when using a remote control.) Make sure to install the outdoor unit in a safe place where snowfall will not be obstructed. The frame should be installed in a place where the air inlet and heat exchanger of the unit are not buried in the snow. Ventilation system will be better installed for the the case of the refrigerant leakage in a closed room even if R410A is nonpoisonous and noninflammable refrigerant. Install the railing around the outdoor unit to prevent falling when the unit is installed at high place of roof on the building. Avoid installing the units in places such as an exhaust pipe and ventilating opening exposed to corrosive gas, oxides of sulfur, ammonia gas or sulfur gas herbicides. (Corroding copper pipes or soldered parts may result in refrigerant leakage.) CAUTION Make sure to install MCU when using HR products. When you select the location to install MCU, the location is far away from indoor rooms because the refrigerant running of MCU may create noise. SPACE REQUIREMENTS The space suggested below is based on operating condition of outdoor temperature of 35 C. If operating condition of outdoor temperature is higher than 35 C, try to have more space. Make sure to clear a passage for a person and air flow. Observe the clearances and dimensions as seen below when installing the outdoor unit. If you install several outdoor units at the same place, observe the space for ventilation and free airflow. If the space for ventilation is insufficient, the air conditioner may not generate performance designed. Keep in mind that SAMSUNG logo is located on the front side of outdoor unit. Single installation 300 or more(s2) Wall height unrestricted 300 or more (Unit : mm) 10 or more Front 10 or more 500 or more(s1) 200 or more preparing the installation _09

preparing the installation SPACE REQUIREMENTS Group installation (Unit : mm) 300 or more(s2) Wall height unrestricted 300 or more 10 or more Front 20 or more 20 or more 10 or more 500 or more(s1) Front 200 or more 400 or more Front 20 or more 20 or more 300 or more 300 or more Front 600 or more Front 10 or more 10 or more 10 or more 20 or more 500 or more 10 or more 20 or more 300 or more Front wall height 1500 mm and less Rear wall height 500 mm and less Side wall height Height unrestricted If the height of the wall exceeds the above value, more space should be added to the front and rear space individually. Front : S1+h1/2, Rear : S2+h2/2 Note The installation space mentioned above is minimum suggested clearance. To secure enough service space and performance of system, take account of more sufficient space. The required minimum space between outdoor units for service and performance of system is at least 100 mm. 10_ preparing the installation

MOVING THE OUTDOOR UNIT Select the moving route in advance. Secure the strength of the carrying to resist against the weight of the outdoor unit while moving. Do not slant the product more than 30 when carrying it. (Do not lay the product down sideways.) The surface of the heat exchanger is sharp. Be careful not to be get injury while moving and installing. When moving with a crane or straps Fasten the wire rope as seen in the picture. To protect damage or scratches, insert a piece of cloth between the outdoor unit and the wire rope. Wire rope/straps Plate protection cloth Outdoor unit leg When moving with a fork lift Insert the fork into the bottom of the outdoor unit carefully. Be careful that the fork does not damage the outdoor unit. Fork part Fork lift DETACHING FASTENERS Open the bottom cabinet with screw driver. The compressors are fastened with nuts in 6 places of only following models. RVXVHT140/160G and RVXVRT140/160G Detach nut washer, washer and stopper nut from compressors with a tool. Remove Stopper nut Washer Nut washer Refasten them with the nut washer only. CAUTION Pay your attention not to touch the copper pipes as detaching the fasteners. The stopper nut and washer should be removed. If this work is not conducted correctly, the outdoor unit could vibrate and make much noise. preparing the installation _11

preparing the installation INSTALLING THE OUTDOOR UNIT CAUTION Do not install the outdoor unit on a wood palette. Fix the outdoor unit securely to the base surface with anchor bolts. The manufacturer is not responsible for the damage occurred by not keeping standard of the installation. Install the outdoor unit 200mm higher than the base surface and install the drain hole to connect the pipe to the drainage. The concrete foundation should be 1.5 times larger than bottom of the outdoor unit. Condensed water may be generated in heating operation. Pay attention to waterproof and drainage of the concrete foundation where the outdoor unit is installed. (An ice may form on the base surface in winter) It is necessary to install wire mesh or steel bar when outdoor units are installed at soft foundation. When installing multiple outdoor units at the same place, install the H beam on the concrete foundation. (When installing a number of outdoor unit, you can install it on the concrete foundation). Install the H beam(150mm x 150mm x t10 : basic specification) or vibration absorption frame to jut out from the concrete foundation. After installing the H beam or vibration absorption frame, apply corrosion protection. Install a square pad(t=20mm or more) or vibration absorption frame to prevent vibration of the outdoor unit delivering to the base surface when installing the concrete for the outdoor unit. Place the outdoor unit on the H beam or vibration absorption frame and fix it with the bolt, nut and washer. (The bearing force is more than 3.5kN) Base mount construction (Unit : mm) Drain hole 200 or more Install the outdoor unit horizontally on the ground 200 or more < When installing on the ground > < When installing on the roof > Outdoor unit installation Outdoor unit Concrete foundation Anchor bolt Nut, Spring washer 20mm A Square pad H beam H beam or vibration absorption frame 50mm A+10~20mm or more 12_ preparing the installation

Outdoor unit base mount and anchor bolt position (Unit:mm) A B 745 765 HP RVXVHT080/100/120 RVXVHT140/160 Model HR RVXVRT080/100/120 RVXVRT140/160 A 880 1200 B 738 1058 Anchor bolt CAUTION When tightening the anchor bolt - Tighten the rubber washer to prevent the outdoor unit bolt connection part from corroding. Rubber washer When connecting the pipes - Check the strength of the roof to install the outdoor unit and make sure to have a waterproof floor of the roof. - Make sure that a proper drainage system has been put in place around the outdoor unit. - To protect the internal components of the outdoor unit, secure the pipework entrance to the unit. Close the part. (When the pipe is projected to the front side) Liquid side pipe Gas side pipe Anchor specifications Size Diameter of drill bit (a) Anchor length (b) Sleeve length (c) Insert depth Fastening torque M10 14mm 75mm 40mm 50mm 30N m preparing the installation _13

preparing the installation INSTALLING THE DRAIN PIPE Insert the provided drain plug at the 2 sides of the bottom of the unit and then connect the drain pipe. Install the drain pipe at the rear side of the unit to get a sufficient space for repairs and service. Outdoor unit (Rear side) Drain plug Drain pipe When installing single outdoor unit When installing multiple outdoor units Outdoor unit (Rear side) Outdoor unit (Rear side) Outdoor unit (Rear side) Outdoor unit (Rear side) Open to air Open to air Drain plug More than 1/50 slope Drain plug More than 1/50 slope Do not install a trap on the pipe. And install the drain pipe horizontally with a slope of 1/50 or more. Insulate the drain pipe and drain plug with insulation over 10t. Install heating device to the drain pipe to prevent it from being frozen. Install the safety equipment for a heating appliance. 14_ preparing the installation

installing the unit REFRIGERANT PIPING WORKS The piping length between the outdoor unit and the indoor unit may not exceed the allowable piping length. The pressure of the R410A is high. Use only certified refrigerant pipe and follow the installation method. Use clean refrigerant pipe which there is no harmful ion, oxide, dust, iron content or moisture inside pipe. Use tools and accessories fit on R410A. Pipe cutter Flaring tool Refrigerant oil Tool Work If compatible with conventional tool Torque wrench Pipe bender Nitrogen gas Brazing tool Gauge manifold Refrigerant charging hose Refrigerant pipe work Ait tightening test Air tightening test ~ additional refrigerant charging Selecting the refrigerant pipe Pipe cutting Pipe flaring Apply refrigerant oil on flared part Connect flare joint with pipe Pipe bending Inhibition of oxidization Pipe brazing Vacuuming, charging and checking operation Compatible Ester series oil, alkyl benzene oil or synthetic oil Compatible Exclusive Vacuum pump Vacuuming unit Use one which has a check valve and 5 torr degree of vacuum. Electronic scale Compatible Gas leak detector Gas leak test Exclusive Flare joint Use indoor unit s only When the equivalent pipe length from outdoor unit to the farthest indoor unit is over 90m, the main pipe (both liquid and gas pipe) has to be increased with 1 size like below table. The pipe length between outdoor and the farthest indoor unit Below 90 m 90m and over ø9.52 ø12.70 Main pipe First branch joint Equivalent pipe length between outdoor unit and the farthest indoor unit Main pipe : from outdoor unit to the first branch joint. ø12.70 ø15.88 ø15.88 ø19.05 ø19.05 ø22.23 ø22.23 ø25.40 ø25.40 ø28.58 ø28.58 ø31.75 ø31.75 ø38.10 ø38.10 Ø44.45 ø44.45 ø50.80 installing the unit _15

installing the unit REFRIGERANT PIPING WORKS Pipe selection for DVM PLUS III Outdoor unit connection pipe size : (A1), (A2), (A3) A1 : Select the pipes according to the outdoor 12HP 14HP 16HP unit capacity with following table. A2 : Select the pipes according to sum of outdoor unit capacities behind the outdoor joint with following table. A3 : Select the main pipe of outdoor units with (E) the following table. (A1) (A1) Pipe size Outdoor Oil (O.D. mm), (A) (A1) (A2) (A3) unit balancing (B) Liquid Gas pipe size (F) 8HP Ø19.05 (D) Ø9.52 10HP Ø22.23 12HP Ø25.40 14HP Ø12.70 (C) 16HP Example) 42HP of compact 18HP combinations 20HP Ø28.58 Ø6.35 Ø15.88 Pipe size 22HP HP Mark (O. D.mm) 24HP 26~30HP Liquid Gas Ø31.75 32~34HP Ø19.05 12 (A1) Ø12.70 Ø25.40 36~48HP Ø38.10 14 (A1) Ø12.70 Ø25.40 50~64HP Ø22.23 Ø44.45 16 (A1) Ø12.70 Ø28.58 26 (A2) Ø19.05 Ø31.75 *A1 : Pipes to the outdoor unit (Liquid, Gas) *A2 : Pipes between outdoor joint kits (Liquid, Gas) 42 (A3) Ø19.05 Ø38.10 *A3 : Main pipes (Liquid, Gas) Pipe size between branch joints : (B) Select the pipe size according to the capacity sum of indoor units which are connected below this pipe. Pipe size (O. D. mm) Total indoor unit s capacity Liquid pipe Gas pipe 15.0 kw and below Ø15.88 Over 15.0~23.2 kw and below Ø9.52 Ø19.05 Over 23.2~29.0 kw and below Ø22.23 Over 29.0~40.6 kw and below Ø25.40 Ø12.70 Over 40.6~46.4 kw and below Ø28.58 Over 46.4~69.6 kw and below Ø15.88 Over 69.6~98.6 kw and below Ø31.75 Ø19.05 Over 98.6~139.2 kw and below Ø38.10 Over 139.2 kw Ø22.23 Ø44.45 Pipe size between branch joints and indoor unit (C) Select the pipe size according to the indoor s capacity. Pipe size (O. D. mm) Indoor unit s capacity Liquid pipe Gas pipe 2.0~5.6 kw Ø6.35 Ø12.70 7.2 14.5 kw Ø9.52 Ø15.88 Branch joint : (D), (E), (F) Branch joint of outdoor unit s multi connection (D) Outdoor multi connection Model Capacity of outdoor branch joint MXJ-T3819K Below 48 HP (D) MXJ-T4422K Above 50 HP First branch joint (E) Select branch joint according to the outdoor unit s capacity. Outdoor unit Model Y-joint (E) 8, 10, 12, 14 HP MXJ-YA2512K 16 HP MXJ-YA2812K 18, 20, 22, 24HP MXJ-YA2815K 26, 28, 30, 32, 34HP MXJ-YA3119K 36, 28, 40, 42, 44, 46, 48HP MXJ-YA3819K 50HP~ MXJ-YA4422K Branch joint (F) Select the pipe size according to the capacity sum of indoor units which are connected below this pipe. 1) Y-joint Model Total indoor unit s capacity MXJ-YA1509K 15.0 kw and below MXJ-YA2512K Over 15.0~40.6 kw and below Y-joint MXJ-YA2812K Over 40.6~46.4 kw and below (F) MXJ-YA2815K Over 46.4~69.6 kw and below MXJ-YA3119K Over 69.6~98.6 kw and below MXJ-YA3819K Over 98.6~139.2 kw and below MXJ-YA4422K Over139.2 kw 2) Header joint Header joint (F) Model MXJ-HA2512K MXJ-HA3115K Total indoor unit s capacity 0~46.4 kw and below 0~69.6k W and below The connectable quantity of indoor units MXJ-HA3819K Over 69.6 kw 8 4 8 16_ installing the unit

Additional refrigerant charging Example) Additional refrigerant charging Ø12.70(1m) Ø12.70(5m) Ø19.05(5m) Ø15.88(10m) Ø9.52(5m) Ø15.88(15m) Ø9.52(7m) Ø12.70(15m) Ø9.52(8m) Ø6.35(5m) Ø6.35(5m) Ø6.35(5m) Ø9.52(5m) Additional refrigerant has to be charged according to the length and size of liquid pipe. Liquid pipe size (O.D. mm) Additional refrigerant charging (kg/m) ø6.35 0.02 ø9.52 0.06 ø12.70 0.125 ø15.88 0.18 ø19.05 0.27 ø22.23 0.35 ø25.40 0.53 Additional refrigerant charging of distribution kit (kg/m) Regardless of the liquid pipe size, additional refrigerant charging is 0.01kg per meter after 0.01 distribution kit. Example of additional refrigerant charging Pipe length is as below without distribution kit Basic model Factory charging (kg) RVXVHT080GE 7.5 RVXVHT100GE 7.5 RVXVHT120GE 7.5 RVXVHT140GE 11.0 RVXVHT160GE 11.0 Remarks For wall-mounted & ceiling Indoor unit Liquid pipe size (O.D. mm) Ø6.35 Ø9.52 Ø12.70 Ø15.88 Ø19.05 Length (m) 15 25 21 25 5 Additional refrigerant = 15 x 0.02 + 25 x 0.06 + 21 x 0.125 + 25 x 0.18 + 5 x 0.27 = 10.275 kg CAUTION Total refrigerant amount of the system must be less then 100kg. If total refrigerant amount of system is over 100kg more, the system has to be divided into smaller system, each containing less than 100kg. installing the unit _17

installing the unit REFRIGERANT PIPING WORKS Pipe selection for DVM PLUSIII HR 12HP (A1) (A1) 14HP (A1) (A2) (D) 16HP (A3) (F) (E) (C) (B) Example) 42HP of compact combinations Pipe size (O. D.mm) HP Mark Liquid Low High gas gas 12 (A1) Ø12.70 Ø25.40 Ø22.23 14 (A1) Ø12.70 Ø25.40 Ø22.23 16 (A1) Ø12.70 Ø28.58 Ø22.23 26 (A2) Ø19.05 Ø31.75 Ø28.58 42 (A3) Ø19.05 Ø38.10 Ø31.75 Outdoor unit connection pipe size : (A1), (A2), (A3) A1 : Select the pipes according to the outdoor unit capacity with following table. A2 : Select the pipes according to sum of outdoor unit capacities behind the outdoor joint with following table. A3 : Select the main pipe of outdoor units with the following table. Pipe size (O.D. mm), (A) Outdoor Oil unit Liquid Gas High balancing pipe pipe gas pipe size pipe 8HP Ø19.05 Ø15.88 Ø9.52 10HP Ø22.23 Ø19.05 12HP 14HP Ø12.70 Ø25.40 Ø22.23 16HP 18HP 20HP Ø28.58 Ø6.35 Ø15.88 Ø25.40 22HP 24HP 26~30HP Ø31.75 Ø28.58 32~34HP Ø19.05 36~48HP Ø38.10 Ø31.75 50~64HP Ø22.23 Ø44.45 Ø38.10 *A1 : Pipes to the outdoor unit (Liquid, Gas, High pressure gas) *A2 : Pipes between outdoor joint kits (Liquid, Gas, High pressure gas) *A3 : Main pipes (Liquid, Gas, High pressure gas) Pipe size between branch joints : (B) Select the pipe size according to the capacity sum of indoor units which are air connected below this pipe. Pipe size (O.D. mm) Total indoor unit s capacity Liquid pipe Gas High pipe gas pipe 15.0 kw and below Over 15.0~23.2 kw and below Over 23.2~29.0 kw and below Over 29.0~40.6 kw and below Over 40.6~46.4 kw and below Over 46.4~69.6 kw and below Over 69.6~98.6 kw and below Over 98.6~139.2 kw and below Over 139.2 kw Pipe size between branch joints and indoor unit : (C) Select the pipe size according to the indoor s capacity. Pipe size (O. D. mm) Indoor unit s capacity Liquid pipe Gas pipe 2.2~5.6 kw Ø6.35 Ø12.70 7.1~14.0 kw Ø9.52 Ø15.88 Branch joint : (D), (E), (F) Branch joint of outdoor unit s multi connection (D) Model Capacity of outdoor Liquid & Low MXJ-T3819K Below 48 HP gas pipe MXJ-T4422K Above 50 HP High gas pipe MXJ-T3100K Below 48 HP MXJ-T3800K Above 50 HP First branch joint (E) Select branch joint according to outdoor unit s capacity. Outdoor unit Model Liquid & Low pressure gas Y-joint (E) High pressure gas Y-joint (E) 8, 10, 12, 14 HP MXJ-YA2512K 16 HP MXJ-YA2812K 18, 20, 22, 24HP MXJ-YA2815K 26, 28, 30, 32, 34HP MXJ-YA3119K 36, 28, 40, 42, 44, 46, 48HP 50HP~ Branch joint (F) Liquid & low pressure gas Y-joint (F) High pressure gas Y-joint (F) MXJ-YA3819K MXJ-YA4422K Outdoor unit Model 8 HP MXJ-YA1500K 10 ~ 24 HP MXJ-YA2500K 26 ~ 48 HP MXJ-YA3100K 50HP~ MXJ-YA3800K Model Total indoor unit s capacity MXJ-YA1509K 15.0 kw and below MXJ-YA2512K Over 15.0~40.6 kw and below MXJ-YA2812K Over 40.6~46.4 kw and below MXJ-YA2815K Over 46.4~69.6 kw and below MXJ-YA3119K Over 69.6~98.6 kw and below MXJ-YA3819K Over 98.6~139.2 kw and below MXJ-YA4422K Over 139.2 kw Model Total indoor unit s capacity MXJ-YA1500K 23.2 kw and below MXJ-YA2500K Over 23.2 ~ 69.6 kw and below MXJ-YA3100K Over 69.6 ~ 139.2 kw and below MXJ-YA3800K Over 139.2 kw CAUTION The sum of the total capacity of the indoor units connected to a MCU should not be over the max. 44.8kW. 18_ installing the unit

Additional refrigerant charging Example) Additional refrigerant charging Ø12.70(1m) Ø12.70(5m) Ø19.05(10m) Additional refrigerant is charged according to the length and size of liquid pipe. Liquid pipe size (O.D. mm) Additional refrigerant charging (kg/m) Ø6.35 0.02 Ø9.52 0.06 Ø12.70 0.125 Ø15.88 0.18 Ø19.05 0.27 Ø22.23 0.35 Ø25.40 0.53 Basic model Factory charging (kg) RVXVHT080GE 7.5 RVXVHT100GE 7.5 RVXVHT120GE 7.5 RVXVHT140GE 11.0 RVXVHT160GE 11.0 MCU-4EAE1 Ø9.52 (10m) Ø9.52 (15m) Ø15.88(10m) Ø6.35(15m) Ø15.88(10m) Ø6.35(2m) Ø9.52 (25m) Ø9.52(18m) MCU-4EAE1 Ø6.35(10m) Ø9.52(15m) Ø9.52(18m) Additional refrigerant charging of MCU kit (kg/unit) Additional refrigerant charging of MCU is 0.5kg for every MCU kit Additional refrigerant charging of distribution kit (kg/m) Regardless of the liquid pipe size, additional refrigerant charging is 0.01kg per meter after 0.01 distribution kit Example of additional refrigerant charging Pipe length is as below. Liquid pipe Ø6.35 Ø9.52 Ø12.70 Ø15.88 Ø19.05 size (O.D. mm) Length (m) 25 83 6 20 10 Additional refrigerant = 25 x 0.02 + 83 x 0.06 + 6 x 0.125 + 20 x 0.18 + 10 x 0.27 + (2+18) x 0.01 + 2 x 0.5 = 13.73 kg 0.5 Remarks For wall-mounted & ceiling indoor unit MCU Pipe length after distribution kit (m) 2 Ea 20 (2+18) CAUTION Total refrigerant amount of the system must be less then 100kg. If total refrigerant amount of system is over 100kg more, the system has to be divided into smaller system, each containing less than 100kg. Temper grade and minimum thickness of the refrigerant pipe Outer diameter[mm] Minimum thickness[mm] Temper grade Ø6.35 0.7 Ø9.52 0.7 Ø12.70 0.8 Ø15.88 0.8 Ø19.05 0.9 Ø22.23 0.9 Ø25.40 1.0 Ø28.58 1.1 Ø31.75 1.1 Ø38.10 1.35 Ø44.45 1.6 Ø50.80 2.0 C1220T-O C1220T-1/2H or C1220T-H Make sure to use C1220T-1/2H (Semi-hard) pipe for more than Ø 19.05mm. In case of using CAUTION C1220T-O (Soft) pipe for Ø 19.05mm, pipe may be broken, which can result in an injury. installing the unit _19

installing the unit REFRIGERANT PIPING WORKS Keeping refrigerant pipe clean and dry To prevent foreign materials or water from entering the pipe, it is important to keep the refrigerant pipe clean and dry and to seal it during installation. Exposure place Exposure time Sealing type Outside exposure Longer than one month Shorter than one month Pipe pinch Taping Inside exposure - Taping Brazing the pipe Make sure that there is no moisture inside the pipe. Make sure that there are no foreign materials and impurities in the pipe. Make sure that there is no leak. Make sure to follow the instruction when brazing the pipe. The use of Nitrogen gas 1. Use Nitrogen gas when brazing the pipes as shown in the picture. 2. If you don t use Nitrogen gas when brazing the pipes, oxide may form inside the pipe. It can cause the damage of the compressor, valves. 3. Adjust the flow rate of the nitrogen gas with a pressure regulator to maintain 0.05m 3 /h or less. Brazing part Nitrogen gas Pressure regulator 1/4" copper pipe Stop valve Taping Flowmeter Direction of the pipe when brazing Performing the brazing of the pipe should be headed downwards or horizontally. 20_ installing the unit

Cutting or Flaring the pipes To prevent foreign materials or water from entering the pipe, it is important to keep the refrigerant pipe clean and dry and to seal it while installing. 1. Make sure that you prepared the required tools. (pipe cutter, reamer, flaring tool and pipe holder) 2. If you want to shorten the pipe, cut it using a pipe cutter ensuring that the cut edge remains at 90 with the side of the pipe. There are some examples of correctly and incorrectly cut edges below. Oblique Rough Burr 3. To prevent a gas leak, remove all burrs at the cut edge of the pipe using a reamer. 4. Carry out flaring work using flaring tool as shown below. Flaring tool A York Flaring bar Clutch type Wing nut type Flaring bar Copper pipe Flare joint Copper pipe A(mm) Outer diameter (mm) Flare tool for Conventional flare tool R410A clutch type Clutch type Wing nut type ø 6.35 0~0.5 1.0~1.5 1.5~2.0 ø 9.52 0~0.5 1.0~1.5 1.5~2.0 ø 12.70 0~0.5 1.0~1.5 1.5~2.0 ø 15.88 0~0.5 1.0~1.5 1.5~2.0 5. Check if you flared the pipe correctly. There are some examples of incorrectly flared pipes below. Inclined Damaged surface Cracked Uneven thickness installing the unit _21

installing the unit REFRIGERANT PIPING WORKS Aligning the pipes Check that the flaring is properly made. Align the center of the piping and sufficiently tighten the flare nut with fingers. Finally, tighten the flare nut with torque wrench until the wrench clicks. When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on the wrench. Make sure to use ester oil to coat the flare connection section. Pipe Flare connection section Flare joint Outer diameter (mm) Connection torque (kgf cm) Flare dimension (mm) Flare shape (mm) ø 6.35 145~175 8.70~9.10 ø 9.52 333~407 12.80~13.20 ø 12.70 505~615 16.20~16.60 ø 15.88 630~769 19.30~19.70 90 ±2 45 ±2 R 0.4~0.8 Caution for connecting the pipe CAUTION Blowing nitrogen should be done when brazing the pipe. Make sure to use the provided flare joint. Make sure that there are any cracks on the bent pipe. Do not fasten the flare joint with excessive strength. Use ester oil to coat the flare connection section to prevent refrigerant leak. R410A is a high pressure refrigerant therefore there is a risk of refrigerant leakage if the flare connection is not coated by ester oil. 22_ installing the unit

Free piping & wiring directions DVM PLUS III is easy to install as its piping can be connected from front, right, left and bottom side. Wiring hole (Conduits) adds convenience as it allows power and communication lines to be connected in various ways and directions. Left side Front side Right side Caution for using knock-out hole CAUTION Make sure not to damage the exterior of the outdoor unit. Remove all burrs at the edge of the knock-out hole and apply the paints it to prevent rust. Use a cable tube and bushing to prevent a cable from being damaged when passing through a knock-out hole. Knock-out hole installing the unit _23

installing the unit REFRIGERANT PIPING WORKS Connecting the outdoor unit pipe Working process Connection from front side First, remove the cover from unit. Separate the knock-out hole to use. If the hole is open, small animals such as squirrels and rats may get into the unit through the hole and the unit may be damaged. Fix the pipe cover of bottom side and fix the pipe cover of upper side thereafter. Connection from bottom at the left/right side Separate the knock-out hole at the bottom side of the unit and install the pipe. Close the hole not to use after installing a pipe and insulating a pipe. If the hole is open, small animals such as squirrels and rats may get into the unit through the hole and the unit may be damaged. Liquid side pipe Liquid side pipe Single installation Gas side pipe Oil balancing valve Gas side pipe Oil balancing valve Knock-out hole HP Liquid side pipe Liquid side pipe Combination installation Gas side pipe Oil balancing valve Gas side pipe Oil balancing valve Knock-out hole 24_ installing the unit

Connection from front side Connection from bottom at the left/right side Liquid side pipe Liquid side pipe Single installation Gas side pipe Oil balancing valve High pressure gas side pipe Gas side pipe High pressure gas side pipe Knock-out hole HR Combination installation Gas side pipe Liquid side pipe Oil balancing valve High pressure gas side pipe Gas side pipe Liquid side pipe Oil balancing valve High pressure gas side pipe Knock-out hole Caution for connecting the pipe CAUTION When connecting the pipe to the unit, the unit may get damaged by a welding fire and a flame. Use a flame proofing cloth to protect the unit from a welding fire or flame. Ambient air temperature sensor for detecting outside temperature is located on the left side of the welding part. Make sure not to damage the temperature sensor when welding it. The O-ring and Teflon packing inside service valve may get damaged by a welding fire. Wrap the bottom side of the service valve with a wet cloth and weld it as shown above. Make sure not to interrupt the welding with the drops of the wet cloth. The connecting pipes of liquid side and gas side should not contact each other. Vibration may cause a damage to the pipes. installing the unit _25

installing the unit REFRIGERANT PIPING WORKS Piping works among outdoor units The additional branch joints are needed for module installation of the outdoor units. When outdoor units are installed in module, there is no designation of outdoor unit s location according to capacity. The connected piping should be positioned at the same level with pipe cover hole or lower. Cautions Correct piping work Wrong piping work The refrigerant piping should be the same level or lower than connecting position of piping to outdoor units. Piping work should be run with side direction for better uniform distribution of refrigerant and oil like next diagram. Outdoor joint kits should be installed in a horizontal direction, even it is a low pressure pipe. Horizontal length = over 100mm Minimum 100mm When the piping length between outdoor and branch joints is 2m or more, a vertical trap has to be installed like right diagram. 200~300mm Less than 1m 2m or over 2m or over 26_ installing the unit

The examples of the refrigerant pipe installation Heat Pump model Example of piping layouts for DVM PLUS III Using Y- joint Using Header joint Heat Recovery model Example of piping layouts Using Y- joint installing the unit _27

installing the unit REFRIGERANT PIPING WORKS Piping examples Heat Pump model Branch with Y-joint Branch with Y and Header joint Branch with Header joint One outdoor unit installed a b c d e f g p F G h i j k l m n a b c d e f g h i Multiple outdoor units installed a b c d e f g p F G h i j k l m n Max. piping length Level difference Allowable length after branch Outdoor ~ Indoor unit Outdoor ~ Outdoor unit Items Examples Remarks a+b+c+d+e+f+g+p 200 m Branch with Y-joint Piping (220m) Equivalent pipe 200 m below length (Equivalent Branch with Y-joint and a+i+k 200 m (220 m) (220 m below) Y-joint : 0.5 m, piping) Header joint a+b+h 200 m (220 m) Header : 1 m Branch with header joint a+i 200 m (220 m) Branch with Y-joint a+b+c+d+e+f+g+p+h+i+j+k+l+ m+n 1000 m Total piping 1000 m below Branch with Y-joint and a+b+c+d+e+f+g+p+h+i+j+k Header joint 1000 m Branch with a+b+c+d+e+f+g+p+h+i Header joint 1000 m Piping 10 m below r 10, s 10, t 10 m Equivalent piping 13 m below r 13, s 13, t 13 m Outdoor ~ Piping 50 m / 40 m* Indoor unit 2) H1 50/40 m Indoor ~ Indoor Piping 15 m below H2 15 m unit Outdoor ~ Piping 15 m below H3 5 m Outdoor unit The first branch ~ the farthest indoor unit Piping 45 m below b+c+d+e+f+g+p 45 m, i 45 m 90 m below *1) It needs to satisfy required conditions Only apply to DVM PLUS III ( DVM PLUS III HR exclusion) Distribution kit Model Remarks From distribution kit to indoor unit 3 m MEV-A13SA / MEV-A16SA ( For 1 indoor unit) MXD-A13K116A / MXD-A13K200A / MXD-A16K200A / MXD- For wall-mounted & Allowable A22K200A ( For 2 indoor units) From distribution kit to indoor unit 20m ceiling indoor unit MXD-A13K216A / MXD-A13K300A / MXD-A16K213A / MXD- A16K300A ( For 3 indoor units) *1) Required condition Required condition The first branch joint ~ If the sum of pipe length (b+c+d+e+f+g+p) is over 45m,(but not exceed : 90m) the farthest indoor unit Increase pipe size of b, c, d, e, f, g. (b, c, d, e, f, g : pipe 1 size up) If main pipe size is not increased, a+bx2+cx2+dx2+ex2+fx2+gx2+h+i+j+k+l+m+n+p 1000 m Font size If main pipe size is increased, ax2+bx2+cx2+dx2+ex2+fx2+gx2+h+i+j+k+l+m+n+p 1000 m Total pipe length h, i, j,...p 45 m The difference between the distance of the outdoor unit to the farthest indoor Between indoor unit and the distance of the outdoor unit to the nearest indoor unit 45m units (a+b+c+d+e+f+g+p) - (a+h) 45m *2) As an outdoor unit is located in a lower position than indoor unit, level difference is 40m. The refrigerant amount of the system must be less than 100kg. 28_ installing the unit Example

Heat Recovery model Branch with Y-joint Using MCU only Using Y- joint and MCU Max. piping length Level difference Allowable length after branch Items Examples Remarks a+b+c+d+e+f+g 200 m Using MCU only (220m) Piping (Equivalent piping) 200m below (220m below) Using Y-joint and MCU a+g+m 200 m (220 m) Outdoor ~ Using MCU only a+b+c+d+e+f+g 1000 m Outdoor unit Total piping 1000m below a+b+c+d+e+f+g+p+h+i+j+k+m Using Y-joint and MCU 1000 m Piping 10 m below r 10, s 10, t 10 m Equivalent piping 13 m below r 13, s 13, t 13 m Outdoor ~ Indoor unit Piping 50 m / 40 m *2) H1 50/40 m Indoor ~ Indoor unit Piping 15m below H2 15 m Outdoor ~ Outdoor unit Piping 5m below H3 5 m MCU~MCU Piping 15m below H4 15 m The first branch Using MCU only 45 m ~ Piping 45 m below the farthest Using Y-joint and MCU g+m 45 m Indoor unit MCU(Included EEV) Piping 20m below m 20 m Equivalent pipe length. Y joint : 0.5m, Header : 1m, MCU : 1m Distribution kit Model Remarks Allowable From distribution kit to indoor unit 3 m MEV-A13SA/MEV-A16SA (For 1 indoor unit) For wall-mounted & ceiling Indoor unit *1) As an outdoor unit is located in a lower position than indoor unit, level difference is 40m. The refrigerant amount of the system must be less than 100kg. installing the unit _29

installing the unit REFRIGERANT PIPING WORKS Installing the branch joints Y-joint Install the Y-joint horizontally or vertically. < Install horizontally> < Install vertically> Note When using A~J type of Y-joint, connect the Y-joint to the pipe with provided reducer. When using K~Z type of Y-joint, connect the Y-joint to the pipe by cutting the inlet of the Y-joint or provided reducer properly. 10~15mm or more Keep a minimum distance of 500mm or more before CAUTION connecting a branch joint. Reducer Pipe To other branch Rear joint or indoor unit Pipe Reducer Rear Front To outdoor unit Install the Y-joint within ±15 on the horizon or on the vertical. Main pipe 500mm or more 30_ installing the unit

Header joint 1. Select the reducer fitted on the diameter of the pipe. Pipe Reducer Pipe Reducer Pipe To indoor unit To indoor unit To outdoor unit To outdoor unit < Liquid side > < Gas side > 2. Braze the pipes ends with caps if the number of connected indoor unit is fewer than header joint ports. Connection in order Connection in order Reducer < Liquid side > Blocked the port of header joint Reducer < Gas side > Blocked the port of header joint CAUTION When using A~J type of header joint, connect the header joint to the pipe with provided reducer. When using K~Z type of header joint, connect the header joint to the pipe by cutting the provided reducer properly. Connect the header joint in order respecting the number of the indoor unit. Connect the indoor unit as the highest capacity comes first. 10~15mm or more 3. Install the header joint horizontally. - Install the header joint horizontally so that it is not facing down. Reducer Branch joint The horizon ±10 or less The horizon ±15 or less Pipe The horizon ±10 or less The horizon ±15 or less The horizon < Liquid side > < Gas side > Note Incorrect installation of Y-joint and header joint cause poor oil and refrigerant distribution between indoor units. It may decrease the system s performance or bring about the compressor failure. installing the unit _31

installing the unit REFRIGERANT PIPING WORKS Installing the branch joints Outdoor joint Installation of outdoor joint Oil balancing pipe Gas pipe Liquid pipe High pressure gas pipe Do not install the outdoor joint like the above diagram. Use the attached reducer properly according to the selected pipe size. To other outdoor unit Pipe To other outdoor joint or outdoor unit Reducer Pipe To other outdoor joint or Y-joint of the main pipe Reducer at the liquid side <Liquid pipe> To other outdoor unit Pipe To other outdoor joint or outdoor unit To other outdoor unit Reducer Reducer Pipe To other outdoor joint or Y- joint of the main pipe To other outdoor joint or outdoor unit <Gas pipe, High pressure gas pipe> Note When using A~J type of Outdoor joint, connect the Outdoor joint to the pipe with provided reducer. When using K~Z type of Outdoor joint, connect the Outdoor joint to the pipe by cutting provided reducer properly. 10~15mm or more 32_ installing the unit

To the other outdoor unit Pipe Pipe To the other outdoor joint or outdoor unit T-joint (Field supply) Oil balancing pipe To the other outdoor joint or outdoor unit Install the oil balancing pipe without T-joint when connecting 2 outdoor units. <T-joint for oil balancing> <Oil balancing pipe> Note Keep in mind that T-joint must be installed horizontally to have best oil return to each compressor. Installing MCU Model MCU-6EAE1 MCU-4EAE1 MCU-4EAEV1 The exterior of MCU Quantity of the connectable indoor units The maximum capacity of the connectable indoor units Built-in EEV Note Up to 6 units Up to 4 units Up to 4 units 44.8kW 44.8kW 44.8kW Not included Not included Included Cannot connect the indoor unit that EEV is not included in. Cannot connect the indoor unit that EEV is not included in. EEV Can connect the indoor unit that EEV is not included in. MCU-4EAEV1 is supplied with EEV bypass valve located on the front side of MCU being opened for indoor unit with EEV. To connect the indoor units not having EEV, close EEV bypass valve. installing the unit _33