ENGLISH English is original. JG79R495H01 Model names are indicated in 1-3. When installing multi units, refer to the installation manual of the multi unit for outdoor unit installation. SPLIT-TYPE AIR CONDITIONERS INSTALLATION MANUAL Required Tools for Installation Phillips screwdriver 4 mm hexagonal wrench Level Flare tool for R410A Scale Gauge manifold for R410A Utility knife or scissors Vacuum pump for R410A 75 mm hole saw Charge hose for R410A Torque wrench Pipe cutter with reamer Wrench (or spanner) 1. BEFORE INSTALLATION 1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY • Be sure to read “THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY” before installing the air conditioner. • Be sure to observe the warnings and cautions speciﬁed here as they include important items related to safety. • After reading this manual, be sure to keep it together with the OPERATING INSTRUCTIONS for future reference. WARNING N Do not install the unit by yourself (user). Incomplete installation could cause fire or electric shock, injury due to the unit falling, or leakage of water. Consult the dealer from whom you purchased the unit or a qualiﬁed installer. N Perform the installation securely referring to the installation manual. Incomplete installation could cause ﬁre, electric shock, or injury due to the unit falling, or leakage of water. N When installing the unit, use appropriate protective equipment and tools for safety. Failure to do so could cause injury. N Install the unit securely in a place which can bear the weight of the unit. If the installation location cannot bear the weight of the unit, the unit could fall causing injury. N Electrical work should be performed by a qualiﬁed, experienced electrician, according to the installation manual. Be sure to use an exclusive circuit. Do not connect other electrical appliances to the circuit. If the capacity of the power circuit is insufﬁcient or there is incomplete electrical work, it could result in a ﬁre or an electric shock. N Earth the unit correctly. Do not connect the earth to a gas pipe, water pipe, lightning rod or telephone earth. Defective earthing could cause electric shock. N Do not damage the wires by applying excessive pressure with parts or screws. Damaged wires could cause ﬁre or electric shock. N Be sure to cut off the main power in case of setting up the indoor P.C. board or wiring works. Failure to do so could cause electric shock. N Use the speciﬁed wires to connect the indoor and outdoor units securely and attach the wires ﬁrmly to the terminal block connecting sections so the stress of the wires is not applied to the sections. Do not extend the wires, or use intermediate connection. N N N N N N N (Could lead to death, serious injury, etc.) Incomplete connecting and securing could cause ﬁre. Do not install the unit in a place where inﬂammable gas may leak. If gas leaks and accumulates in the area around the unit, it could cause an explosion. Do not use intermediate connection of the power cord or the extension cord and do not connect many devices to one AC outlet. It could cause a ﬁre or an electric shock due to defective contact, defective insulation, exceeding the permissible current, etc. Be sure to use the parts provided or speciﬁed parts for the installation work. The use of defective parts could cause an injury or leakage of water due to a ﬁre, an electric shock, the unit falling, etc. When plugging the power supply plug into the outlet, make sure that there is no dust, clogging, or loose parts in both the outlet and the plug. Make sure that the power supply plug is pushed completely into the outlet. If there is dust, clogging, or loose parts on the power supply plug or the outlet, it could cause electric shock or ﬁre. If loose parts are found on the power supply plug, replace it. Attach the electrical cover to the indoor unit and the service panel to the outdoor unit securely. If the electrical cover of the indoor unit and/or the service panel of the outdoor unit are not attached securely, it could result in a ﬁre or an electric shock due to dust, water, etc. When installing, relocating, or servicing the unit, make sure that no substance other than the speciﬁed refrigerant (R410A) enters the refrigerant circuit. Any presence of foreign substance such as air can cause abnormal pressure rise and may result in explosion or injury. The use of any refrigerant other than that speciﬁed for the system will cause mechanical failure, system malfunction, or unit breakdown. In the worst case, this could lead to a serious impediment to securing product safety. Do not discharge the refrigerant into the atmosphere. If refrigerant leaks during installation, ventilate the room. CAUTION If refrigerant comes in contact with a ﬁre, harmful gas could be generated. Refrigerant leakage may cause suffocation. Provide ventilation in accordance with EN378-1. N Check that the refrigerant gas does not leak after installation has been completed. If refrigerant gas leaks indoors, and comes into contact with the ﬂame of a fan heater, space heater, stove, etc., harmful substances will be generated. N Use appropriate tools and piping materials for installation. The pressure of R410A is 1.6 times more than R22. Not using appropriate tools or materials and incomplete installation could cause the pipes to burst or injury. N When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes. If the refrigerant pipes are disconnected while the compressor is running and the stop valve is open, air could be drawn in and the pressure in the refrigeration cycle could become abnormally high. This could cause the pipes to burst or injury. N When installing the unit, securely connect the refrigerant pipes before starting the compressor. If the compressor is started before the refrigerant pipes are connected and when the stop valve is open, air could be drawn in and the pressure in the refrigeration cycle could become abnormally high. This could cause the pipes to burst or injury. N Fasten a ﬂare nut with a torque wrench as speciﬁed in this manual. If fastened too tight, a ﬂare nut may break after a long period and cause refrigerant leakage. N The unit shall be installed in accordance with national wiring regulations. (Could lead to serious injury in particular environments when operated incorrectly.) If there is defect in the drainage/piping work, water could N Do not install the outdoor unit where small animals may N Install an earth leakage breaker depending on the instaldrop from the unit, soaking and damaging household goods. lation place. live. If an earth leakage breaker is not installed, it could cause N Do not touch the air inlet or the aluminum ﬁns of the If small animals enter and touch the electric parts inside the electric shock. outdoor unit. unit, it could cause a malfunction, smoke emission, or ﬁre. This could cause injury. Also, advise user to keep the area around the unit clean. N Perform the drainage/piping work securely according to the installation manual. 1-2. SELECTING THE INSTALLATION LOCATION INDOOR UNIT Where airﬂow is not blocked. Where cool air spreads over the entire room. Rigid wall without vibration. Where it is not exposed to direct sunshine. Do not expose to direct sunshine also during the period following unpacking to before use. • Where easily drained. • At a distance 1 m or more away from your TV and radio. Operation of the air conditioner may interfere with radio or TV reception. An ampliﬁer may be required for the affected device. • In a place as far away as possible from ﬂuorescent and incandescent lights (so the infrared remote control can operate the air conditioner normally). • Where the air ﬁlter can be removed and replaced easily. REMOTE CONTROLLER • Where it is easy to operate and easily visible. • Where children cannot touch it. • Select a position about 1.2 m above the ﬂoor and check that signals from the remote controller are surely received by the indoor unit from that position (‘beep’ or ‘beep beep’ receiving tone sounds). After that, attach remote controller holder to a pillar or wall and install wireless remote controller. • • • • Note: In rooms where inverter type ﬂuorescent lamps are used, the signal from the wireless remote controller may not be received. OUTDOOR UNIT • Where it is not exposed to strong wind. • Where airﬂow is good and dustless. • Where rain or direct sunlight can be avoided as much as possible. • Where neighbours are not annoyed by operation sound or hot air. • Where rigid wall or support is available to prevent the increase of operation sound or vibration. • Where there is no risk of combustible gas leakage. • When installing the unit at a high level, be sure to secure the unit legs. • Where it is at least 3 m away from the antenna of TV set or radio. Operation of the air conditioner may interfere with radio or TV reception in areas where reception is weak. An ampliﬁer may be required for the affected device. • Install the unit horizontally. • Please install it in an area not affected by snowfall or blowing snow. In areas with heavy snow, please install a canopy, a pedestal and/or some bafﬂe boards. Note: It is advisable to make a piping loop near outdoor unit so as to reduce vibration transmitted from there. Note: When operating the air conditioner in low outside temperature, be sure to follow the instructions described below. • Never install the outdoor unit in a place where its air inlet/ outlet side may be exposed directly to wind. • To prevent exposure to wind, install the outdoor unit with its air inlet side facing the wall. • To prevent exposure to wind, it is recommended to install a bafﬂe board on the air outlet side of the outdoor unit. Avoid the following places for installation where air conditioner trouble is liable to occur. • Where ﬂammable gas could leak. • Where there is much machine oil. • Where oil is splashed or where the area is ﬁlled with oily smoke (such as cooking areas and factories, in which the properties of plastic could be changed and damaged). • Salty places such as the seaside. • Where sulﬁde gas is generated such as a hot spring. • Where there is high-frequency or wireless equipment. • Where there is emission of high levels of VOCs, including phthalate compounds, formaldehyde, etc., which may cause chemical cracking. 1-3. SPECIFICATIONS Model Indoor unit MSZ-GF60VE MSZ-GF71VE Power supply *1 Outdoor unit Wire speciﬁcations *2 Rated Voltage Frequency Breaker capacity Power supply Indoor/outdoor connecting wire 230 V 50 Hz 20 A 3-core 2.5 mm2 4-core 1.0 mm2 MUZ-GF60VE MUZ-GF71VE *1 Connect to the power switch which has a gap of 3 mm or more when open to interrupt the source power phase. (When the power switch is shut off, it must interrupt all phases.) *2 Use wires in conformity with design 60245 IEC 57. *3 Never use pipes with thickness less than specified. The pressure resistance will be insufﬁcient. *4 *5 *6 *7 Pipe size (thickness *3, *4) Gas / Liquid ø15.88 / 6.35 mm (1.0 / 0.8 mm) ø15.88 / 9.52 mm (1.0 / 0.8 mm) (GF60/GF71) Pipe length and height difference Max. pipe length 30 m Max. height difference 15 m Max. number of bends *5, *6 10 Refrigerant adjustment A *7 20/55 g/m 8 mm Insulation thickness *8, *9 Use a copper pipe or a copper-alloy seamless pipe. Additional refrigerant = A × (pipe length (m) -10) Be careful not to crush or bend the pipe during pipe bending. *8 Insulation material : Heat resisting foam plastic 0.045 speRefrigerant pipe bending radius must be 100 mm or more. ciﬁc gravity If pipe length exceeds 10 m, additional refrigerant (R410A) *9 Be sure to use the insulation of speciﬁed thickness. Excescharge is required. (No additional charge is required for sive thickness may cause incorrect installation of the indoor pipe length less than 10 m.) unit and insufﬁcient thickness may cause dew drippage. 7 (3) Remote controller holder 1 Fixing screw for (3) 3.5 × 16 mm (Black) 2 (5) Battery (AAA) for (6) (6) Wireless remote controller 2 1 Felt tape (For left or left-rear piping) 1 (7) After the leak test, apply insulating material tightly so that there is no gap. 12 mm or more (4) 140 m or mo m re When the piping is to be attached to a wall containing metals (tin plated) or metal netting, use a chemically treated wooden piece 20 mm or thicker between the wall and the piping or wrap 7 to 8 turns of insulation vinyl tape around the piping. To use existing piping, perform COOL operation for 30 minutes and pump down before removing the old air conditioner. Remake ﬂare according to the dimension for new refrigerant. <Outdoor unit> (8) Drain socket 1 PARTS TO BE PROVIDED AT YOUR SITE (A) (B) (C) (D) (E) (F) (G) (H) Indoor/outdoor unit connecting wire* 1 Extension pipe 1 Wall hole sleeve 1 Wall hole cover 1 Pipe ﬁxing band 2 to 5 Fixing screw for (E) 4 × 20 mm 2 to 5 Piping tape 1 Putty 1 Drain hose (I) (or soft PVC hose, 15 mm inner diameter or hard PVC pipe VP16) 500 mm or more ( ) (8) 1 or 2 (J) Refrigeration oil (K) Power supply cord* 1 1 Units should be installed by licensed contractor according to local code requirements. 35 or m0 mm ore mme 500mor or * Note: Place indoor/outdoor unit connecting wire (A) and power supply cord (K) at least 1 m away from the TV antenna wire. Fix the pipe to wall with pipe ﬁxing band (E). Cut off the extra length. Pipe ﬁxing band (E) Fixing screw (F) Outdoor unit installation 840 mm 175 mm 500 mm Air inlet Air outlet 40 mm 2/4-10 mm × 21mm slot Drain piping for outdoor unit • Provide drain piping before indoor and outdoor piping connection. • Connect drain hose (I) I.D.15 mm as shown in the illustration. • Make sure to provide drain piping with a downhill grade for easy drain ﬂow. Note: Install the unit horizontally. Do not use drain socket (8) in cold regions. Drain may freeze and make the fan stop. The outdoor unit produces condensate during the heating operation. Select the installation place to ensure to prevent the outdoor unit and/or the grounds from being wet by drain water or damaged by frozen drain water. mm 100more or 10 or m0 mm ore () (I) Seal the wall hole gap with putty (H). 349-371 mm 1 Installation plate ﬁxing screw (2) 4 × 25 mm 149 m m or mo re 390 mm (1) Installation plate Wall hole cover (D) Be sure to use wall hole Indoor unitit sleeve (C) to prevent indoor/outdoor connecting wire (A) from contacting Wall hole metal parts in the wall and sleeve (C) to prevent damage by rodents in case the wall is hollow. 330 mm ACCESSORIES Check the following parts before installation. <Indoor unit> 55 mm or more/ 118 mm or more for left and left back piping (using spacer) 1-4. INSTALLATION DIAGRAM Appearance of the outdoor unit may differ from some models. 2. INDOOR UNIT INSTALLATION 2-1. FIXING OF INSTALLATION PLATE • Find a structural material (such as a stud) in the wall and ﬁx installation plate (1) horizontally by tightening the ﬁxing screws (2) ﬁrmly. • To prevent installation plate (1) from vibrating, be sure to install the ﬁxing screws in the holes indicated in the illustration. For added support, ﬁxing screws may also be installed in other holes. • When the knockout is removed, apply vinyl tape to the knockout edges to prevent damaging the wires. • When bolts recessed in the concrete wall are to be utilized, secure installation plate (1) using 11 × 20 · 11 × 26 oval hole (450 mm pitch). • If the recessed bolt is too long, change it for a shorter one available in the market. 4) Loosen terminal screw, and connect ﬁrst the earth wire, then indoor/outdoor unit connecting wire (A) to the terminal block. Be careful not to make mis-wiring. Fix the wire to the terminal block securely so that no part of its core is appeared, and no external force is conveyed to the connecting section of the terminal block. 5) Firmly tighten the terminal screws to prevent them from loosening. After tightening, pull the wires lightly to conﬁrm that they do not move. 6) Secure indoor/outdoor unit connecting wire (A) and the earth wire with the VA clamp. Never fail to hook the left claw of the VA clamp. Attach the VA clamp securely. Terminal block 2-2. WALL HOLE DRILLING VA clamp 1) Determine the wall hole position. 2) Drill a ø 75 mm hole. The outdoor side should be 5 to 7 mm lower than the indoor side. 3) Insert wall hole sleeve (C). Ceiling Installation plate (1) ø 75 mm Fixing screw 5-7 mm Outdoor side 15 mm 35 mm 55 mm or more 118 mm or more for left and left back piping (using spacer) Lead wire Level Indoor/outdoor unit connecting wire (A) 140 mm or more 149 mm or more 100 mm Wall Fixing screw (2) Insert the scale. * Align the scale with the line. * Wall Center of ø 75 mm hole * Same for left hole. • For future servicing, give extra length to the connecting wires. • Make earth wire a little longer than others. (More than 60 mm) • Do not fold the excess wire, or cram it into small space. Take caution not to damage the wires. • Be sure to attach each screw to its correspondent terminal when securing the cord and/or the wire to the terminal block. Note: Do not place the wires between the indoor unit and the installation plate (1). Damaged wire could cause heat generation or ﬁre. Indoor terminal block Earth wire (green/yellow) Indoor/outdoor unit connecting wire (A) Outdoor terminal block 2-3. CONNECTING WIRES FOR INDOOR UNIT You can connect indoor/outdoor lead wire without removing the front panel. 1) Open the front panel. 2) Remove VA clamp. 3) Pass indoor/outdoor unit connecting wire (A) from the back of the indoor unit and process the end of the wire. 2-4. PIPE FORMING AND DRAIN PIPING Pipe Forming • Place the drain hose below the refrigerant piping. • Make sure that the drain hose is not heaved or snaked. • Do not pull the hose when applying the tape. • When the drain hose passes the room, be sure to wrap insulation material (obtainable at a store) around it. Liquid pipe Gas pipe Indoor/outdoor unit connecting wire (A) Felt tape (7) Piping tape (G) right, or downward piping Cut off in case of 1) Put the refrigerant piping and the drain hose right piping. together, then firmly apply piping tape (G) from the end. Cut off in case of 2) Insert the piping and the drain hose into the downward piping. wall hole sleeve (C), and hook the upper part of the indoor unit on the installation plate (1). 3) Check if the indoor unit is hooked securely on the installation plate (1) by moving the unit to left and right. 4) Thrust the lower part of the indoor unit into the installation plate (1). Drain Piping • If the extension drain hose has to pass through a room, be sure to wrap it with commercially sold insulation. • The drain hose should point downward for easy drain ﬂow. (Fig. 1) • If the drain hose provided with the indoor unit is too short, connect it with drain hose (I) that should be provided at your site. (Fig. 2) • When connecting the drain hose to the hard vinyl chloride pipe, be sure to insert it securely into the pipe. (Fig. 3) Drain hose Drain hose Downward slope Hard vinyl chloride pipe I.D. 30 mm 70 cm or more Soft hose I.D. 15 mm Insert securely Different diameter joint Fig. 1 Fig. 2 Fig. 3 Do not make drain p piping p g as shown below. Accumulated A drain water Do not raise Tip of drain hose dipped in water er Air Water leakage Water leakage Waving Water leakage At least 50 mm gap Ditch Left or left-rear piping Note: Be sure to reattach the drain hose and the drain cap in case of left or left-rear piping. Otherwise, it could cause drops of water to drip down from the drain hose. Cut off in case of left piping. Piping tape (G) Felt tape (7) Drain cap Drain cap 1) Put the refrigerant piping and the drain hose together, then ﬁrmly apply felt tape (7) from the end. Felt tape (7) overlap width should be 1/3 the tape width. Use a bandage stopper at the end of felt tape (7). 2) Pull out the drain cap at the rear right of the indoor unit. Fig. 1 (Fig. 1) • Hold the convex section at the end and pull the drain cap. 3) Pull out the drain hose at the rear left of the indoor unit. (Fig. 2) hose • Hold the claw marked by the arrows and pull out the Fig. 2 drain hose forward. 4) Put the drain cap into the section to which the drain hose is to be attached at the rear of the indoor unit. (Fig. 3) • Insert not sharp-edged tools such as screwdrivers Drain cap into the hole at the end of the cap and insert the cap fully into the drain pan. Fig. 3 5) Insert the drain hose fully into the drain pan at the rear Drain hose right of the indoor unit. (Fig. 4) • Check if the hose is hooked securely to the projection of its inserting part at the drain pan. Fig. 4 6) Insert the drain hose into wall hole sleeve (C), and hook the upper part of indoor unit on installation plate (1). Then, move the indoor unit completely to the left in order to make placing the piping in the back space of the unit easier. 7) Cut out a piece of cardboard from the shipping box, roll Fig. 5 it up, hook it onto the back rib, and use it as a spacer to lift the indoor unit. (Fig. 5) 8) Connect the refrigerant piping with the extension pipe (B). 9) Thrust the lower part of the indoor unit into the installation plate (1). 3. OUTDOOR UNIT INSTALLATION 3-1. CONNECTING WIRES FOR OUTDOOR UNIT 1) Open the service panel. 2) Loosen terminal screw, and connect indoor/outdoor unit connecting wire (A) from the indoor unit correctly on the terminal block. Be careful not to make mis-wiring. Fix the wire to the terminal block securely so that no part of its core is appeared, and no external force is conveyed to the connecting section of the terminal block. 3) Firmly tighten the terminal screws to prevent them from loosening. After tightening, pull the wires lightly to conﬁrm that they do not move. 4) Connect power supply cord (K). 5) Fix indoor/outdoor unit connecting wire (A) and power supply cord (K) with the cord clamp. 6) Close the service panel securely. Terminal block 15 mm 35 mm Lead wire • Make earth wire a little longer than others. (More than 100 mm) • For future servicing, give extra length to the connecting wires. • Be sure to attach each screw to its correspondent terminal when securing the cord and/or the wire to the terminal block. Cord clamp Power supply cord (K) Indoor/outdoor unit connecting wire (A) 3-2. FLARING WORK 1) Cut the copper pipe correctly with pipe cutter. (Fig. 1, 2) Copper pipe 2) Completely remove all burrs from the cut cross section of pipe. (Fig. 3) Fig. 1 • Put the end of the copper pipe to downward direction as you remove burrs in order to avoid to let burrs drop in the piping. No good 3) Remove flare nuts attached to indoor and outdoor Good units, then put them on pipe having completed burr removal. (Not possible to put them on after flaring work.) 4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension shown in the table. Select A mm from Tilted Uneven Burred the table according to the tool you use. Fig. 2 5) Check • Compare the ﬂared work with Fig. 6. • If ﬂare is noted to be defective, cut off the ﬂared section and do ﬂaring work again. Burr Copper pipe Flaring tool Spare reamer Pipe cutter Fig. 3 Wing nut type Clutch type Fig. 4 Smooth all around Copper pipe Die nut Pipe diameter (mm) ø 6.35 (1/4”) ø 9.52 (3/8”) ø12.7 (1/2”) ø15.88 (5/8”) Fig. 5 Inside is shining without any scratches. Even length all around A (mm) Nut Clutch type Clutch type (mm) tool tool for R22 for R410A 17 22 0 to 0.5 1.0 to 1.5 26 29 Fig. 6 Tightening torque Wing nut type tool for R22 N•m 13.7 to 17.7 34.3 to 41.2 49.0 to 56.4 2.0 to 2.5 73.5 to 78.4 1.5 to 2.0 kgf•cm 140 to 180 350 to 420 500 to 575 750 to 800 3-3. PIPE CONNECTION • Fasten ﬂare nut with a torque wrench as speciﬁed in the table. • When fastened too tight, ﬂare nut may brake after a long period and cause refrigerant leakage. • Be sure to wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite. Indoor unit connection Connect both liquid and gas pipings to indoor unit. • Apply a thin coat of refrigeration oil (J) on the seat surface of pipe. • For connection, ﬁrst align the center, then tighten the ﬁrst 3 to 4 turns of ﬂare nut. • Use tightening torque table below as a guideline for indoor unit side union joint section, and tighten using two wrenches. Excessive tightening damages the ﬂare section. Outdoor unit connection Connect pipes to stop valve pipe joint of the outdoor unit in the same manner applied for indoor unit. • For tightening, use a torque wrench or spanner and use the same tightening torque applied for indoor unit. WARNING When installing the unit, securely connect the refrigerant pipes before starting the compressor. 3-4. INSULATION AND TAPING 1) Cover piping joints with pipe cover. 2) For outdoor unit side, surely insulate every piping including valves. 3) Using piping tape (G), apply taping starting from the entry of outdoor unit. • Stop the end of piping tape (G) with tape (with adhesive agent attached). • When piping have to be arranged through above ceiling, closet or where the temperature and humidity are high, wind additional commercially sold insulation to prevent condensation. 4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN 4-1. PURGING PROCEDURES AND LEAK TEST 4-2. TEST RUN 1) Remove service port cap of stop valve on the side of the outdoor unit gas pipe. (The stop valves are fully closed and covered in caps in initial state.) 2) Connect gauge manifold valve and vacuum pump to service port of stop valve on the gas pipe side of the outdoor unit. 1) Insert power supply plug into the power outlet and/or turn on the breaker. Check that all LED lamps are not lit. If they are blinking, check that the horizontal vane is installed correctly. Refer to operating instructions for details. 2) Press the E.O. SW once for COOL, and twice for HEAT operation. Test run will be performed for 30 minutes. If the upper lamp of the operation indicator blinks every 0.5 seconds, inspect the indoor/outdoor unit connecting wire (A) for mis-wiring. After the test run, emergency mode (set temperature 24ºC) will start. 3) To stop operation, press the E.O. SW several times until all LED lamps turn off. Refer to operating instructions for details. Compound pressure gauge *4 to 5 turns Stop valve cap (Torque 19.6 to 29.4 N•m, 200 to 300 kgf▪cm) *Close *Open –0.101 MPa (for R410A) (–760 mmHg) Pressure gauge (for R410A) Stop valve for LIQUID Handle Low Hexagonal wrench Stop valve for GAS Service port cap (Torque 13.7 to 17.7 N•m, 140 to 180 kgf•cm) Adapter for preventing the back ﬂow Gauge manifold valve (for R410A) Handle High Charge hose (for R410A) Vacuum pump (or the vacuum pump with the function to prevent the back ﬂow) g the control valve Precautions when using g the control valve When attaching to the service port, p , valve core mayy deform or loosen if excess pressure p is applied. pp This may y cause gas g leak. Service port A Control valve Open Charge hose Close Body When attaching the control valve to the service port, make sure that the valve core is in closed position, and then tighten part A. Do not tighten part A or turn the body when valve core is in open position. 3) Run the vacuum pump. (Vacuumize for more than 15 minutes.) 4) Check the vacuum with gauge manifold valve, then close gauge manifold valve, and stop the vacuum pump. 5) Leave as it is for one or two minutes. Make sure pointer gauge manifold valve remains in the same position. Conﬁrm that pressure gauge shows –0.101 MPa [Gauge] (–760 mmHg). 6) Remove gauge manifold valve quickly from service port of stop valve. 7) After refrigerant pipes are connected and evacuated, fully open all stop valves on both sides of gas pipe and liquid pipe. Operating without fully opening lowers the performance and this causes trouble. 8) Refer to 1-3., and charge the prescribed amount of refrigerant if needed. Be sure to charge slowly with liquid refrigerant. Otherwise, composition of the refrigerant in the system may be changed and affect performance of the air conditioner. 9) Tighten cap of service port to obtain the initial status. 10) Leak test operation switch (E.O. SW) Checking the remote (infrared) signal reception Press the ON/OFF button on the remote controller (6) and check that an electronic sound is heard from the indoor unit. Press the ON/OFF button again to turn the air conditioner off. • Once the compressor stops, the restart preventive device operates so the compressor will not operate for 3 minutes to protect the air conditioner. 4-3. AUTO RESTART FUNCTION This product is equipped with an auto restart function. When the power supply is stopped during operation, such as during blackouts, the function automatically starts operation in the previous setting once the power supply is resumed. (Refer to the operating instructions for details.) Caution: • After test run or remote signal reception check, turn off the unit with the E.O. SW or the remote controller before turning off the power supply. Not doing so will cause the unit to start operation automatically when power supply is resumed. To the user • After installing the unit, make sure to explain the user about auto restart function. • If auto restart function is unnecessary, it can be deactivated. Consult the service representative to deactivate the function. Refer to the service manual for details. 4-4. EXPLANATION TO THE USER • Using the OPERATING INSTRUCTIONS, explain to the user how to use the air conditioner (how to use the remote controller, how to remove the air ﬁlters, how to remove or put the remote controller in the remote controller holder, how to clean, precautions for operation, etc.) • Recommend the user to read the OPERATING INSTRUCTIONS carefully. 5. RELOCATION AND MAINTENANCE 5-1. REMOVING AND INSTALLING THE PANEL ASSEMBLY 5-3. PUMPING DOWN When relocating or disposing of the air conditioner, pump down the system following the procedure below so that no refrigerant is released into the atmosphere. 1) Connect the gauge manifold valve to the service port of the stop valve on the gas pipe side of the outdoor unit. 2) Fully close the stop valve on the liquid pipe side of the outdoor unit. 3) Close the stop valve on the gas pipe side of the outdoor unit almost completely so that it can be easily closed fully when the pressure gauge shows 0 MPa [Gauge] (0 kgf/ cm2). 4) Start the emergency COOL operation. To start the emergency operation in COOL mode, disconnect the power supply plug and/or turn off the breaker. After 15 seconds, connect the power supply plug and/or turn on the breaker, and then press the E.O. SW once. (The emergency COOL operation can be performed continuously for up to 30 minutes.) 5) Fully close the stop valve on the gas pipe side of the outdoor unit when the pressure gauge shows 0.05 to 0 MPa [Gauge] (approx. 0.5 to 0 kgf/cm2). 6) Stop the emergency COOL operation. Press the E.O. SW several times until all LED lamps turn off. Refer to operating instructions for details . Removal procedure 1) Remove the 3 screws which ﬁx the panel assembly. 2) Remove the panel assembly. Be sure to remove its bottom end ﬁrst. Installation procedure 1) Install the panel assembly following the removal procedure in reverse. 2) Be sure to press the positions as indicated by the arrows in order to attach the assembly completely to the unit. 5-2. REMOVING THE INDOOR UNIT WARNING Remove the bottom of the indoor unit from the installation plate. When releasing the corner part, release both left and right bottom corner part of indoor unit and pull it downward and forward as shown in the ﬁgure on the right. When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes. The compressor may burst if air etc. get into it. If the above method cannot be used Remove the front panel. Then, insert hexagonal wrenches into the square holes on the left and right sides of the unit and push them up as shown in the following ﬁgure. The bottom of the indoor unit lowers and releases the hooks. Lower Square hole This product is designed and intended for use in the residential, commercial and light-industrial environment. The product at hand is based on the following EU regulations: 2006/95/EC: Low Voltage Directive 2006/42/EC: Machinery Directive 2004/108/EC: Electromagnetic Compatibility Directive 2009/125/EC: Energy-related Products Directive HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN AUTHORIZED REPRESENTATIVE IN EU: MITSUBISHI ELECTRIC EUROPE B.V. HARMAN HOUSE, 1 GEORGE STREET, UXBRIDGE, MIDDLESEX UB8 1QQ, U.K.