MITSUBISHI ELECTRIC MUZ-AP20VG Split Type Air Conditioners Instruction Manual

MITSUBISHI ELECTRIC MUZ-AP20VG Split Type Air Conditioners

Product Information
The product is a split-type air conditioner designed for installation. The model names are indicated in sections 1-3 of the installation manual. The refrigerant used in the air conditioner is not specified in the given text.

Product Usage Instructions
Required Tools for Installation

• Socket Wrench
• Screwdriver
• Hammer
• Measuring Tape
• Level or Spirit Level
• Drill Machine
• Adjustable Wrench
• Pliers
• Wire Stripper

Before Installation
Meanings of Symbols Displayed on Indoor Unit and/or Outdoor Unit The following symbols are displayed on the indoor unit and/or outdoor unit:

• **23(5$7,1*** : This symbol indicates important instructions for safety.
• ,16758 &7,216: This symbol indicates cautionary information for proper use and maintenance.
• ,167$//$7,21 0$18$/ : This symbol represents general information related to the product.
• *LQIRUPDWLRQ LV DYDLODEOH LQ WKH 23(5$7,1,16758 &7,216,167$//$7,21 0$18$/ DQG WKH OLNH**: This symbol indicates that further information can be found in the installation manual.

The Following Should Always be Observed for Safety
Before installing the product, make sure to observe the following safety precautions:

1. Read and understand the installation manual.
2. Ensure that the installation is performed by a qualified professional.
3. Follow all electrical codes and regulations during installation.
4. Disconnect the power supply before starting the installation process.
5. Avoid touching sharp edges and hot surfaces during installation.
6. Do not modify or alter any components of the air conditioner.
7. Keep flammable materials away from the unit.
8. Regularly clean and maintain the air conditioner to ensure safe operation.

Phillips screwdriver Level

• Scale Utility knife or scissors
• 65 mm hole saw
• Torque wrench
• Wrench (or spanner)
• Required Tools for Installation
• 4 mm hexagonal wrench
• Flare tool for R32, R410A
• Gauge manifold for R32, R410A
• Vacuum pump for R32, R410A
• Charge hose for R32, R410A
• Pipe cutter with a reamer

Model names are indicated in 1-3. When installing multi-units, refer to the installation manual of the multi-unit for outdoor unit installation.

BEFORE INSTALLATION
MEANINGS OF SYMBOLS DISPLAYED ON INDOOR UNIT AND/OR OUTDOOR UNIT 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.

• Before starting the connection setup of the Wi-Fi interface, check the safety precautions in OPERATING INSTRUCTIONS of the room 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
• Do not install the unit by yourself (user).
• Incomplete installation could cause fire, electric shock,
• When plugging the power supply plug into the
• Fasten a flare nut with a torque wrench as specified injury due to the unit falling, or leakage of water. Con- outlet, make sure that there is no dust, or clogging, in this manual. or loose parts in both the outlet and the plug. Make If fastened too tight, a flare nut may break after a long sult the dealer from whom you purchased the unit, or a sure that the power supply plug is pushed com-period and cause refrigerant leakage.
• The unit shall be installed in accordance with na-
• Perform the Installation securely referring to the
• If there is dust, clogging, or loose parts on the positional wiring regulations.
• Incomplete installation could cause fire, electric shock, supply plug, or the outlet, it could cause an electric shock or
• When using a gas burner or other flame-producing fire. If loose parts are found on the power supply plug, nearly queue to the un Italiano. on leakage or waeer. replace it. equipment, completely remove all of the refrigerants
• When installing the unit, use appropriate protective I Attach the electrical cover to the indoor unit and the from the air conditioner and ensure that the area is well-ventilated. equipment and tools for safety. Service panels to the outdoor unit securely.
• Failure to do so could cause injury.
• If the electrical cover of the indoor unit and/or the service
• If the refrigerant leaks and comes in contact with fire or
• Install the unit securely in a place that can bear the weight of the unit. panel of the outdoor unit is not attached securely, it heating part, it will create harmful gas and there is a risk of fire. could result in a fire or an electric shock due to dust,
• If the installation location cannot bear the weight of the unit, the unit could fall causing injury. water, etc.
• Electrical work should be performed by a qualified,
• When installing, relocating, or servicing the unit, an experienced electrician, according to the installation make sure that no substance other than the species find refrigerant (R32) enters the refrigerant circuit. manual be sure to use an exclusive circular Do not.
• Any presence of foreign substances such as air can connect other electrical appliances to the circuit.
• If the capacity of the power circuit is insufficient or there causes abnormal pressure rise and may result in explosion or injury. The use of any refrigerant other than that is incomplete electrics work, I could recurring Tre or specify for the system will cause mechanical failure or an electric shock.
• Earth the unit correctly. system malfunction, or unit breakdown. In the worst
• Do not connect the earth to a gas pipe, water pipe, or case, this could lead to a serious impediment to securing product safety.
• lightning rod, or telephone earth. Defective earthing I Do not discharge the refrigerant into the atmos- could cause electric shock.
• Do not damage the wires by applying excessive spheres. If refrigerant leaks during the installation, ventilate the room. Check that the refrigerant does not pressure with parts or screws. leak after the installation has been completed.
• Damaged wires could cause Tre or electric shock.
• Be sure to cut off the main power in case of setting
• If refrigerant leaks and comes in contact with fire or
• Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
• The appliance shall be stored in a room without continuously operating ignition sources (for the exam. ple: open flames, an operating gas appliance, or an operating electric neater. vo nor pierce or burn.
• Be aware that refrigerants may not contain an odor. Pipe-work shall be protected from physical damage. The Installation of pipe-work shall be kept to a minimum.
• Compliance with national gas regulations shall be observed
• Keep any required ventilation openings clear of obstruction. up the indoor P.C. board or wiring works. heating part of such a fan heater, kerosene heater, or
• Failure to do so could cause an electric shock. cooking stove, it will create harmful gas. Provide ventilated- ton in accordance with EN378-1.
• Do not install the indoor unit equipped with the WI-FI interface nearby the automatic control devices such
• Use the specified wires to connect the indoor and Use appropriate tools and piping materials for install- as automatic doors or tiro alarms. outdoor units securely and attach the wires firmly to the action. It can cause accidents due to malfunctions. the terminal block connecting sections so the stress of the wires is not applied to the sections. Do not have A pressure of R32 1.6 times more than R22? Not I Do not use the indoor unit equipped with the Wi-Fi
• using appropriate tools or materials and incompletely extending the wires, or using the intermediate connection. or people who have a medical device such as Incomplete connecting and securing could cause a fire. installation could cause the pipes to burst or be injured. interface nearby the medical electrical equipment
•  Do not install the unit in a place where flammable
• When pumping down the refrigerant, stop the com-cardiac pacemaker or an implantable cardioverter. pressor before disconnecting the refrigerant pipes. defibrillator. gas may leak.

If gas leaks and accumulates in the area around the refrigerant pipes are disconnected while they can cause an accident due to malfunctions of the unit, it could cause an explosion.  the compressor is running and the stop valve is open, air medical equipment or device could be drawn in and the pressure in the refrigeration This indoor unit is equipped with the Wi-Fi interface Do not use an intermediate connection or the power cycle could become abnormally high. This could cause the cord or the extension cord and do not connect many of the pipes to burst or injury. should be installed and operated with a minimum distance of 20 cm between the device and the user devices to one AC outlet It could cause a fire or an electric shock due to defective When installing the unit, securely connect the re-or bystanders. contact, defective insulation, and exceeding the permissible refrigerant pipes before starting the compressor. If the compressor is started before the refrigerant pipes 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. 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 injured.

CAUTION (Could lead to serious injury in particular environments when operated incorrectly.) Install an earth leakage breaker depending on the I Do not install the outdoor unit where small and- installation place.
mals may live.

• Do not touch the air inlet or the aluminum fins of
• Before operating the air conditioner, ventilate the room and the outdoor unit well after such work is performed. Otherwise, it may
• This could cause is inior cause volatile elements to adhere inside the air conditioner. resulting in water leakage or scattering of dew
• To prevent damage from static electricity, touch a nearby metal body to discharge static electricity from yourself before touching the indoor unit equipped with the Wi-Fi interface. Static electricity from the human body may damage the Wi-Fi interface unit.
• Do not use the indoor unit equipped with the
• Wi-Fi interface nearby other wireless devices, microwaves. cordless ones. facsimiles can cause malfunctions

SELECTING THE INSTALLATION LOCATION

INDOOR UNIT
WARNING
The unit must be installed in rooms that exceed the floor space specified below.

AP50VG: 1.7 m?
As for the details, please refer to the Installation Service Manual for New Refrigerant System.

• Where airflow is not blocked.
• Where cool (or warm) 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 before use. Where easily drained.
• At a distance 1 m or more away from your TV and radio. Operation of the air condi- toner 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. In order to make the infrared remote control operate the air conditioner normally. The heat from the lights may cause deformation or the ultraviolet may cause deterioration.
• here the air filter can be removed and replaced easily.  Where it is away from the other heat or steam source. Please ensure that the Router supports the WPA2-AES encryption setting before the commencement of the installation of this indoor unit equipped with the Wi-Fi interface.
• The End user should read and accept the terms and conditions of the Wi-Fi service before the commencement of the installation of this indoor unit equipped with the Wi-Fi interface. This indoor unit equipped with the Wi-Fi interface should not be installed and connected to any Mitsubishi Electric system which is to provide application-critical cooling or heating.

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 the remote controller holder to a pillar or wall and install a wireless remote controller.
Note: In rooms where inverter-type fluorescent lamps are used, the signal from the wireless remote controller may not be received.

SPECIFICATIONS

Model| Power supply *1| Wire specifications| Pipe size

(thickness 3, 4)

| ****

Maximum amount of refrigerant charge *7

---|---|---|---|---
Indoor unit| Outdoor unit| Rated Voltage| Frequency| Breaker

capacity

| Power supply *2| Indoor/outdoor

connecting wire *2

| Gas / Liquid
MSZ-AP25VG(K)| MUZ-AP25VG(H)| ****

23O V

| ****

5O Hz

| ****

1O A

| 3-core

1.O mm2

| ****

4-core

1.O mm2

| ****

09.52 / 6.35 mm (O.8 mm)

| 81O g
MSZ-AP35VG(K)| MUZ-AP35VG(H)
MSZ-AP42VG(K)| MUZ-AP42VG(H)| 96O g
MSZ-AP5OVG(K)| MUZ-AP5OVG(H)| 16 A| 3-core

2.O mm2

| 126O g
Pipe length and height difference

Max. pipe length| 2O m
Max. height difference| 12 m
Max. number of bends 5, 6| 1O
Refrigerant adjustment A 7| 2O g/m
Insulation thickness 8, *9| 8 mm

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 a thickness less than specified. The pressure resistance will be insufficient.
4. Use a copper pipe or a copper-alloy seamless pipe.
5. Be careful not to crush or bend the pipe during pipe bending.
6. The refrigerant pipe bending radius must be 100 mm or more.
7. If the pipe length exceeds 7 m, an additional refrigerant (R32) charge is required. (No additional charge is required for pipe length less than 7 m.) Additional refrigerant = A × (pipe length (m) – 7)
8. Insulation material: Heat-resisting foam plastic 0.045 specific gravity
9.  Be sure to use insulation of a specified thickness. Excessive thickness may cause incorrect installation of the indoor unit and insufficient thickness may cause dew drippage.

OU DOOR UNIT

• Where it is not exposed to strong wind. If the outdoor unit is exposed to the wind during defrosting, the defrosting time will be longer.

• Where airflow is good and dustless.

• here rain or direct sunlight can be avoided as much as possible.

• Where neighbors are not annoyed by operation sound or hot (or cool) 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 the 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 the outdoor unit so as to reduce vibration transmitted from there.

Note
When operating the air conditioner in low outside temperatures, 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 the 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 hot springs, sewage, and wastewater.
• 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.
• The appliance shall be stored so as to prevent mechanical damage from occurring.

INSTALLATION DIAGRAM
ACCESSORIES
Check the following parts before installation. Cindesr unis

(For left or left-rear piping)

| 1
(5)| Battery (AAA) for (3)| 2
(6)| Drain socket (VG type only)| 1
---|---|---
(A)| Indoor/outdoor unit connecting wire*1| 1
---|---|---
(B)| Extension pipe| 1
(C)| Wall hole sleeve| 1
(D)| Wall hole cover| 1
(E)| Pipe fixing band| 2 to 5
(F)| Fixing screw for (E) 4 x 2O mm| 2 to 5
(G)| Piping tape| 1
(H)| Putty| 1
(I)| Drain hose

(or soft PVC hose, 15 mm inner diameter or hard PVC pipe VP16)

| 1 or 2
(J)| Refrigeration oil| 1
(K)| Power supply cord*1| 1

PARTS TO BE PROVIDED AT YOUR SITE

Note

1. Place the indoor/outdoor unit connecting wire (A) and power supply cord (K) at least 1 m away from the TV antenna wire.
2. This indoor unit is equipped with a built-in Wi-Fi interface. (VGK type only)
3.  When any 2 sides of the left, right, and rear of the unit are clear
4. The manufacturing year and month are indicated on the spec nameplate.
5. The appearance of the outdoor unit may differ from some models.

IMPORTANT NOTES
Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects. The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans. 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 a COOL operation for 30 minutes and pump down before removing the old air conditioner. Remake flare according to the dimension for the new refrigerant.

WARNING
To avoid the risk of fire, embed or protect the refrigerant piping. External damage to the refrigerant piping can cause of fire.

• Drain piping for outdoor unit
• Provide drain piping before indoor and outdoor piping connection.
• Connect drain hose (1) 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 sockets (6) in cold regions. The 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.

INDOOR UNIT INSTALLATION
FIXING OF INSTALLATION PLATE

• Find a structural material (such as a stud) in the wall and fix the 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 damage- in the wires.
• When bolts recessed in the concrete wall are to be utilized, secure the installation plate (1) using an 11 × 20  11 × 26 oval hole (450 mm pitch).
• If the recessed bolt is too long, change it to a shorter one available in the market.

WALL HOLE DRILLING Wall

1. Determine the wall hole position.
2. Drill a 065 mm hole. The outdoor side should be 5 to 065 mm 5-7 mm lower than the indoor side.
3. Insert wall hole sleeve (C).
4. Outdoor side

CONNECTING WIRES FOR INDOOR UNIT
You can connect indoor/outdoor lead wire without removing the front panel.

1. Open the front panel.
2. Remove the VA clamp.
3. Pass the indoor/outdoor unit connecting wire (A) from the back of the indoor unit and process the end of the wire.
4. Loosen the terminal screw, and connect first the earth wire, then the indoor/outdoor unit con- nesting wire (A) to the terminal block.
5. Be careful not to make miswiring. 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.
6. Firmly tighten the terminal screws to prevent them from loosening. After tightening, pull the wires lightly to confirm that they do not move.
7. Secure the 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.

• 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). The damaged wire could cause heat generation or fire.

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.

Rear, right, or downward piping

1. Put the refrigerant piping and the drain hose together- Cut off in case of right piping. er, then firmly apply piping tape (G) from the end.
2. Insert the piping and the drain hose into the wall hole sleeve (C), and hook the upper part of the Cut off in case of downward piping. 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 the 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 the drain hose (1) 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)
• Do not make drain pining as shown below.

Left or left-rear piping
Note:
Be sure to reattach the drain hose-Piping ta Felt tape (4) 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.

1. Put the refrigerant piping and the drain hose together, then firmly apply felt tape (4) from the end. Felt tape (4) overlap width should be 1/3 the tape width. Use a bandage stopper at the end of the felt tape (4).
2. Pull out the drain cap at the rear right of the indoor unit. (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) Hold the claw marked by the arrows and pull out the 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 into the hole at the end of the cap and insert the cap fully into the drain pan.
5.  Insert the drain hose fully into the drain pan at the rear 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.
6. Insert the drain hose into the wall hole sleeve (C), and hook the upper part of the indoor unit on the 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

OUTDOOR UNIT INSTALLATION

CONNECTING WIRES FOR OUTDOOR UNIT

1. Open the service panel.
2. Loosen the terminal screw, and connect the indoor/outdoor unit connecting wire (A) from the indoor unit correctly on the terminal block. Be careful not to make miswiring. 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 the power supply cord (K).
5.  Fix the indoor/outdoor unit connecting wire (A) and power supply cord (K) with the cord clamp.
6. Close the service panel securely.

Pipe diameter (mm)

|

Nut (mm)

| A (mm)| Tightening torque
---|---|---|---
Clutch type tool for R32,

R41OA

| Clutch type tool for R22| Wing nut type tool for R22|

N•m

|

kgf•cm

06.35 (1/4″)| 17|

O to O.5

|

1.O to 1.5

|

1.5 to 2.O

| 13.7 to

17.7

| 14O to

18O

09.52 (3/8″)| 22| 34.3 to

41.2

| 35O to

42O

012.7 (1/2″)| 26|

2.O to 2.5

| 49.O to

56.4

| 5OO to

575

015.88 (5/8″)| 29| 73.5 to

78.4

| 75O to

8OO

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.

PIPE CONNECTION

• 0Fasten flare nut with a torque wrench as specified in the table.
• When fastened too tight, the flare nut may break 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 piping to the indoor unit.
• Apply a thin coat of refrigeration oll (J) on the flared ends of the pipes. Do not apply refrigeration oil on screw threads. Excessive tightening torque will result in damage to the screw.
• For connection, first, align the center, then tighten the first 3 to 4 turns of the flare nut.
• Use the tightening torque table above as a guideline for the indoor unit side union joint section, and tighten using two wrenches. Excessive tightening damages the flare section. Outdoor unit connection
• Connect pipes to the stop valve pipe joint of the outdoor unit in the same manner applied to indoor units.
• For tightening, use a torque wrench or spanner, and use the same tightening torque is applied to the indoor unit.

WARNING
When installing the unit, securely connect the refrigerant- and pipes before starting the compressor.

INSULATION AND TAPING

1. Cover piping joints with pipe cover.
2. For the outdoor unit side, surely insulate every piping including valves.
3. Using piping tape (G), apply to tape starting from the entry of the outdoor unit.
4. Stop the end of piping tape (G) with tape (with adhesive agent attached). When piping has to be arranged above the ceiling, closet, or where the temperature and humidity are high, wind additional commercially sold insulation to prevent condensation.

FLARING WORK

1. Cut the copper pipe correctly with a pipe cutter. (Fig. 1, 2)

2. Completely remove all burrs from the cut cross-section of the pipe. (Fig. 3)

3. Put the end of the copper pipe in a downward direction as you remove burrs in order to avoid letting burrs drop into the piping. Remove flare nuts attached to indoor and outdoor units, then put them on the pipe having completed burr removal.
   (Not possible to put them on after flaring work.)

4. Flaring work (Fig. 4, 5). Firmly hold a copper pipe in the dimension shown in the table. Select A mm from the table according to the tool you use.

5. Check  Compare the flared work with Fig. 6. If the flare is noted to be defective, cut off the flared section and do flaring work again

PURGING PROCEDURES, LEAK TEST, AND TEST RUN
PURGING PROCEDURES AND LEAK TEST

1. Remove the service port cap of the stop valve on the side of the outdoor unit gas pipe. (The stop valves are fully closed and covered in caps in the initial state.)

2. Connect the gauge manifold valve and vacuum pump to the service port of the stop valve on the gas pipe side of the outdoor unit. 4-2. TEST Insert power breaker.

3. Press the E. Test run will

4. Run the vacuum pump. (Vacuumize until 500 microns is achieved.)

5. Check the vacuum with the gauge manifold valve, then close the gauge manifold valve, and stop the vacuum pump.

6. Leave as it is for one or two minutes. Make sure the pointer gauge manifold valve remains in the same position. Confirm that the pressure gauge shows -0.101 MPa [Gauge] (-760 mmHg).

7. Remove the gauge manifold valve quickly from the service port of the stop valve.
   WARNING To avoid the risk of fire, make sure that there are no flammable hazards or ignition risks before opening the stop valves.

8. After refrigerant pipes are connected and evacuated, fully open all stop valves on both sides of the gas pipe and liquid pipe. Operating without fully opening lowers the performance and this causes trouble.

9. Refer to 1-3., and charge the prescribed amount of refrigerant if needed. Be sure to charge slowly with liquid refrigerant. Otherwise, the composition of the refrigerant in the system may be changed and affect the performance of the air conditioner.

10. Tighten the cap of the service port to obtain the initial status.

11.  Leak test

TEST RUN

1.  Insert the power supply plug into the power outlet and/or turn on the breaker.
2. Press the E. O. SW once for COOL, and twice for HEAT operation. The 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 miswiring. After the test run, emergency mode (set temperature 24°C) will start.
3. To stop operation, press the E.O. SW several times until all LED amps turn off. Refer to operating instructions for details.
4. Checking the remote (infrared) signal reception Press the OFF/ON button on the remote controller (3) and check that an electronic sound is heard from the indoor unit. Press the OFF/ON 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.

Caution:
After the 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 the power supply is resumed. To the user
After installing the unit, make sure to explain to the user about the auto restart function.  auto restart function is unnecessary, it can be deactivated. Consult the service representative to deactivate the function. Refer to the service manual for details.

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 clean, precautions for operation, etc.). Recommend the user to read the OPERATING INSTRUCTIONS carefully. SETUP OF THE Wi-Fi INTERFACE (VGK type only) This product is equipped with the Wi-Fi Interface as standard. Refer to the SETUP QUICK REFERENCE GUIDE and OPERATING INSTRUCTIONS provided with the indoor unit for connection with the router.

RELOCATION AND MAINTENANCE
REMOVING AND INSTALLING THE PANEL ASSEMBLY
Removal procedure

1. Open the front panel.
2. Remove the front panel.
3. Remove the 2 screws which fix the panel L.
4. Remove panel L.
5. Remove the 3 screws which fix panel R.
6. Remove panel R.
7. Remove panel U.
8. Remove panel F.

Installation procedure
Install the panel assembly following the removal procedure in reverse. Be sure to press the positions as indicated by the arrows in order to attach the assembly completely to the unit.

REMOVING THE INDOOR UNIT
Remove the bottom of the indoor unit from the install-location plate. Release both the left and right bottom parts of the indoor unit and pull it downward and forward as shown in the figure on the right.

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 kg/cm?).

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 kg/cm?).

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.
   WARNING

7. When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes. The compressor may burst if air etc. get into it.

This product is designed and intended for use in the residential, commercial and light-industrial environments.
MITSUBISHI ELECTRIC CORPORATION
HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

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