Mitsubishi Electronics MSZ-A09/A12YV installation manual Indoor Unit Installation, Series, R410A

MSZ

MUZ

3

Terminal block

L

3

Loosen terminal screw.

•

Use the indoor/outdoor unit connecting wire that meets the Standards to connect the indoor and outdoor units and fix the wire to the terminal block securely so that no external force is conveyed to the connecting section of the terminal block.

Incomplete connection or fixing of the wire could result in a fire.

Attach the electrical cover securely. If it is attached incorrectly, it could result in a fire or an electric shock due to dust, water, etc.

•

WARNING

Indoor/outdoor unit connecting wire

A

Fixing screws

Never fail to hook the left claw on the wire fixture to secure indoor/ outdoor unit connecting wire A.

Securely push the wire into the terminal block until no part of its core is appeared.

VA clamp

ELECTRICAL COVER

Indoor terminal block

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.) (Rated Voltage/Frequency : 230 V/50 Hz)

(Input capacity Main switch/Fuse:10 A)

(This plug has to be the one meets the Standards.)

Power supply cordGreen/Yellow : Ground

Blue : N Brown : L

WARNING

Never cut the indoor and outdoor unit connecting wire and connect it to other wires. It may cause a fire.

Do not bundle the spare wire, but put it as shown below.

4-4 INDOOR AND OUTDOOR CONNECTING WIRE CON- NECTION

You can connect indoor/outdoor lead wire without removing the front panel.

1 Open the front panel.

2 Remove one screw holding the electrical cover, then remove the cover.

3 Remove the VA clamp.

4 Pass the indoor/outdoor unit connecting wire from the back of the indoor unit and process the end of the wire, then connect it to the terminal block.

5 Replace the fixture and electrical cover securely.

Take out power supply cord from the left or right bottom corner of the indoor unit.

•

Indoor/outdoor unit connecting wire Specification

0.3 m/1 m

Cable 4-core 1.0 mm2, in conformity with Design 245 IEC 57.

Power supply cord length (Lead to left/Lead to right)

Use special room air conditioning circuit.

•

4-3 POWER SUPPLY AND CONNECTING WIRE SPECIFI- CATIONS

SG79Y281H07

		SPLIT-TYPE AIR CONDITIONERS	HFC
			utilized
		Models
English			R410A
		MSZ-A09/A12YV
		Series
		MUZ-A09/A12YV(H)	When installing an MXZ series
	INSTALLATION MANUAL	[FLARE CONNECTION TYPE]	outdoor unit, refer to the MXZ type
			manual for outdoor unit set up.

4. INDOOR UNIT INSTALLATION

4-1 FIXING OF INSTALLATION PLATE

•Find a structural material (such as a stud) in the wall and fix installation plate horizontally.

A09YV

Bind the line to the center hole.

79 mm or more

109 mm or more for left and left back piping (using spacer)

CAUTION

•Be careful not to make mis-wiring.

•Firmly tighten the terminal screws to prevent them from loosening.

•After tightening, pull the wires lightly to confirm that they do not move.

•If the connecting wire is incorrectly connected to the terminal block, the unit does not operate normally.

•If an earth is incorrect, it may cause an electric shock.

4-5 AUTO RESTART FUNCTION

• These models are equipped with an auto restart function. If you do not want to use

FOR LEFT OR LEFT-REAR PIPING

•Pipe arrangement

Put the refrigerant piping and the drain hose together, then apply felt tape 7 to them.

Be careful drain
hose is not heaved.	Cut off in case of left piping.

INDOOR UNIT INSTALLATION

•Insert the drain hose into the wall hole sleeve C, and hook the upper part of indoor unit on the installation plate 1. Then, move the unit to the very edge of the

left side for putting the piping easily in the back space of the indoor unit. After that, cut a part of packing material, then roll it as shown below and use it as a spacer to hook on the back rib and lift the indoor unit.

Indoor unit packing cardboard

WARNING

•A means for disconnection of the supply with an isolation switch, or similar device, in all active conductors shall be incorporated in the fixed wiring.

•Never cut the power cord and connect it to other wires. It may cause a fire.

		Power supply cord
Loosen terminal screw.	L
	3 N 2	Indoor terminal block
		Earth wire

1. THE FOLLOWING SHOULD ALWAYS BE

OBSERVED FOR SAFETY

• Please provide an exclusive circuit for the air conditioner and do not connect other

electrical appliances to it.

• Be sure to read “THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR

SAFETY” before installing the air conditioner.

• Be sure to observe the cautions specified here as they include important items

CAUTION

■ Earth the unit.

Do not connect the earth to a gas pipe, water pipe, lightning rod or telephone

earth. Defective earthing could cause an electric shock.

■ Do not install the unit in a place where an inflammable gas leaks.

If gas leak and accumulate in the area surrounding the unit, it could cause an

explosion.

■ Install an earth leakage breaker depending on the installation place

190

mm

or

more

the

wall)

(off

or

more

102

mm

the

wall)

(off

Installation plate fixing

Installation

Plumb

Align the plumb line

screw 2

4 ⋅ 25 mm

plate 1

with the mark .

A12YV

Bind the line to the center hole.

this function, please consult the service representative because the setting of the unit

needs to be changed.

• When the indoor unit is controlled with the remote controller, the operation mode, the

set temperature, and the fan speed are memorized by the indoor electronic control

P.C. board. The auto restart function sets to work the moment the power has restored

after power failure, then, the unit will restart automatically. If the unit is operated in “I

FEEL...” or “AUTO” mode before power failure, the operation mode (COOL, DRY or

HEAT) is not stored in the memory. When the main power is turned on, the unit

decides the operation mode by the initial room temperature at restart and starts

operation again.

Felt tape 7	Use a bandage stopper at
	the end of felt tape 7.

Firmly apply felt tape 7 from the end. (Felt tape 7 overlap width should be 1/3 the tape width.)

Cut the cardboard using
scissors or cutters.
Fix the end with
masking tape or
tape affixed on
the lower side of
indoor unit.	Securely attach
Roll the cutting
piece as shown in	the spacer
the right.	assembly in the
	concave part of
	the rib, taking

care its direction

		(green/yellow)
Lead wire	MSZ	Indoor/outdoor unit
		connecting wire A
	MUZ
Terminal block		4-core 1.0 mm2
<Connection details>
	3 N 2	Outdoor terminal block

related to safety.

• The indications and meanings are as follows.

WARNING

(Where it is humid).

If an earth leakage breaker is not installed, it could cause an electric shock.

■ Perform the drainage/piping work securely according to the installation

79 mm or more

109 mm or more for left

and left back piping (using

spacer)

Operation

1If the main power has been cut, the operation settings remain.

REATTACHING DRAIN HOSE

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.

is correct as shown in the figure right.

Spacer

CAUTION

• Use care not to make mis-wiring.

• Firmly tighten the terminal screws to prevent them from loosening.

• After tightening, pull the wires lightly to confirm that they do not move.

Could lead to death, serious injury, etc.

CAUTION

Could lead to serious injury in particular environments when operated incorrectly.

•After reading this manual, be sure to keep it together with the OPERATING INSTRUCTIONS in a handy place on the customer’s site.

WARNING

■ Do not install the unit by yourself (customer).

Incomplete installation could cause injury due to fire, electric shock, the unit

falling or leakage of water. Consult the dealer from whom you purchased the

unit or special installer.

manual.

If there is a defect in the drainage/piping work, water could drop from the unit

and household goods could be wet and damaged.

■ Fasten a flare nut with a torque wrench as specified in this manual.

When fastened too tight, a flare nut may broken after a long period and cause

a leakage of refrigerant.

2. SELECTING THE INSTALLATION LOCATION

2-1 INDOOR UNIT

• Where airflow is not blocked.

• Where cool air spreads over the entire room.

• Maximum refrigerant piping length between indoor unit and outdoor unit is 20 m

				more		182	mm		or	more
			or
182	mm						the	wall)
						(off
	the	wall)
(off
				Installation	Plumb	Align the plumb line
			Installation plate fixing plate 1			with the mark .
			screw 2 4 ⋅ 25 mm

To prevent the installation plate from vibrating, be sure to fix the holes as indicated by the arrows c.

When bolts recessed in the concrete wall are to be utilized, secure the installation plate 1 using 11 ⋅ 20 · 11 ⋅ 26 oval hole (450 mm pitch).

2When three minutes have passed after power was restored, the unit will restart automatically according to the memory.

Notes:

•The operation settings are memorized when 10 seconds have passed after the remote controller was operated.

•If the main power is turned off or a power failure occurs while AUTO START/STOP timer is active, the timer setting is cancelled. As these models are equipped with an auto restart function, the air conditioner starts operating with timer cancelled at the same time that power is restored.

•If the unit has been off with the remote controller before power failure, the auto restart function does not work as the power button of the remote controller is off.

•To prevent breaker off due to the rush of starting current, systematize other home appliances not to turn on at the same time.

Drain cap

1 Pull out the drain cap at the rear right of the indoor unit.

•Connect the refrigerant piping with the extension pipe B.

•Thrust the lower part of the indoor unit into the installation plate 1.

4-7 DRAIN PIPING

•The drain hose should point downward for easy drain flow. (Fig. 1) Do not make drain piping as shown in Fig. 2 to 5.

		Accumulated
Downward	Do not raise.	drain water
slope		Air

• If the connecting wire is incorrectly connected to the terminal block, the unit

does not operate normally.

Service panel

■ Install the unit securely in a place which can bear the weight of the unit.

When installed in an insufficient strong place, the unit could fall causing injury.

■ 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.

Incomplete connecting and fixing could cause fire.

■ Do not use intermediate connection of the power cord or the extension

•	and the difference of height of both units is 12 m.
	Rigid wall without vibration.
•	Where it is not exposed to direct sunshine.
•	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 in areas where reception is
•	weak. An amplifier may be required for the affected device.
	In a place as far away as possible from fluorescent and incandescent lights (so

If the recessed bolt is too long, change it for a shorter one available in the market.

4-2 WALL HOLE DRILLING

1Determine the wall hole position.

2Drill a 75 mm hole so that outside can be lower than inside.

3 Insert the wall hole sleeve C.

4-6 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 to apply the tape.
•	When the drain hose passes the room, be sure to wrap insulation material (obtain-
•	able at a store) around it.
	Wrap the felt tape 7 around the pipe and the drain hose, then put the pipe in the

Hold the convex section at the end and pull the drain cap.

Drain cap

	Water	Water
	leakage	leakage	Waving
(Fig. 1)	(Fig. 2)		(Fig. 3)
			Drain
			hose

Be sure to fix the indoor/outdoor unit connecting wire A using this cord clamp.

Remove one fixing screw to open the service panel.

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.

■ Check that the refrigerant gas do not leak after installation has com-

pleted.

If refrigerant gas leaks indoors, and comes into contact with the fire of a fan

heater, space heater, stove, etc., harmful substances will be generated.

■ Perform the installation securely referring to the installation manual.

Incomplete installation could cause a personal injury due to fire, electric

shock, the unit falling or leakage of water.

■ Perform electrical work according to the installation manual and be sure

to use an exclusive 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.

■ Attach the electrical cover to the indoor unit and the service panel to the

outdoor unit securely.

the infrared remote control can operate the air conditioner normally).

• Where the air filter can be removed and replaced easily.

2-2 OUTDOOR UNIT

•Where it is not exposed to strong wind.

•Where airflow is good and dustless.

•Where it is not exposed to rain and direct sunshine.

•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 fix 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.

Note:

It is advisable to make a piping loop near outdoor unit so as to reduce vibration transmitted from there.

Positioning of the holes on the wall

Installation plate 1 100 mm

Insert the scale.

	Hole of dia.
Align the scale with the line.	75 mm

Repeat the same procedure for the left hole.

Wall hole

Wall thickness

75 mm dia. One scale

back space of the indoor unit.

	Liquid pipe
Drain hose	Gas pipe
Felt tape 7	Indoor/outdoor unit
	connecting wire A

FOR REAR, RIGHT OR DOWNWARD PIPING

•Pipe arrangement

Put the refrigerant piping and the drain hose together, then apply piping tape G to them.

Be careful drain hose is not Firmly apply piping tape G

2 Pull out the drain hose at the rear left of the indoor unit.

Hold the claw marked by the arrow and pull out the drain hose forward.

Drain hose

3Put the drain cap into the section to which the drain hose is to be attached at the rear of the indoor unit.

Insert the screwdriver, etc. (not sharp-edged tool) into the hole at the end of the cap and

	Tip of drain	Less than	Soft hose
		50 mm gap
	hose dipped
			I.D.
	in water.
			15 mm or
			hard vinyl
Water			chloride
leakage	Ditch
(Fig. 4)		(Fig. 5)

•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.

•If the extension drain hose has to pass through a room, be sure to wrap it with commercially sold insulation.

5. OUTDOOR UNIT INSTALLATION

WARNING

Be sure to attach the service panel of the outdoor unit securely. If it is not attached correctly, it could result in a fire or an electric shock due to dust, water, etc.

5-2 DRAIN PIPING FOR OUTDOOR UNIT

•Provide drain piping before indoor and outdoor piping connection. (It will be hard to install drain socket 9 if indoor and outdoor piping connection is conducted prior to

drain piping as outdoor unit becomes immovable.)

•Connect the drain hose I (obtainable at a store, inside diameter: 15 mm) as shown in the figure for drainage.

•Make sure to provide drain piping with a downhill grade for easy drain flow.

If the electrical cover in the indoor unit and/or the service panel in the outdoor

unit are not attached securely, it could result in a fire or an electric shock due

to dust, water, etc.

■ Be sure to use the part 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.

CAUTION

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.

• Salty places such as the seaside.

(Indoor side)

(Wall hole cross section)

Cut with 1 extra scale length.

Wall hole sleeve C

heaved. from the end.

insert the cap fully into the drain pan.

5-1 INDOOR/OUTDOOR UNIT CONNECTING WIRE CONNECTION

•Connect the indoor/outdoor unit connecting wire A from the indoor unit correctly on the terminal block.

•For future servicing, give extra length to connecting wire.

Drain hose I

■ Be sure to cut off the main power in case of setting up the indoor

electronic control P.C. board or wiring works.

It could cause an electric shock.

■ The appliance shall be installed in accordance with national wiring

regulations.

1

• Where sulfide gas is generated such as a hot spring.

• Where there is high-frequency or wireless equipment.

2-3 WIRELESS REMOTE CONTROLLER MOUNTING

•Place of mounting

•Where it is easy to operate and easily visible.

•Where children can not touch.

•Mounting

Select a position about 1.2 m above the floor, 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 3 to a pillar or wall and set the wireless remote controller 6.

In rooms where inverter type fluorescent lamps are used, the signal from the wireless remote controller may not be received.

Be sure to use wall hole sleeve C to prevent the outdoor connecting wires from contacting with metal part in the wall and to prevent damage by rat in case the wall is hollow.

Wall hole sealing and fixing pipe to wall

Wall hole cover D	Cut off the
Seal the wall hole
	extra length. Pipe fixing
gap with putty H.
	band E
Fix the pipe to wall with
pipe fixing band E.
Indoor unit
Wall hole sleeve C	Fixing screw F

15 mm

35 mm

Lead wire

<Connection details>

Power supply cord

N 2 Indoor terminal block

Earth wire (green/yellow)

Indoor/outdoor unit connecting wire A 4-core 1.0 mm2

N 2 Outdoor terminal block

Cut off in case of right piping. Cut off in case of downward piping.

•Insert the piping and the drain hose into the wall hole sleeve C, and hook the upper part of the indoor unit on the installation plate 1.

•Check if the indoor unit is hooked securely on the installation plate 1 by moving the unit to left and right.

•Thrust the lower part of the indoor unit into the installation plate 1.

Drain cap

4Insert the drain hose into the section to which the drain hose is to be attached at the rear right of the indoor unit.

Insert the drain hose fully into the drain pan. Check if the hose is hooked securely to the projection of its inserting part at the drain pan.

Drain hose

•Peel off both ends of connecting wire (extension wire).

•Be careful not to contact connecting wire with piping.

• Make earth wire a little longer than the others.		15 mm
(more than 35 mm)	35 mm

•For the indoor/outdoor unit connecting wires, be sure to use the ones in compli- ance with the standards.

•Be sure to push the core until it is hidden and pull each cable to make sure that it is not pulled up incomplete insertion may cause a risk of burning the terminal blocks.

Indoor and Outdoor connecting	Cable 4-core 1.0 mm2, in conformity with
wire Specification	Design 245 IEC 57.

Drain socket 9 (For YV type only)

Note:

Do not use the drain socket 9 in the cold region. Drain may freeze and it makes the fan stop.

6. INDOOR/OUTDOOR UNIT CONNECTION

3 Putting nut on

6-4 PURGING PROCEDURES·LEAK TEST

6-5 TEST RUN

7. FOR MOVEMENT AND MAINTENANCE

7-3 GAS CHARGE

3. INSTALLATION DIAGRAM & ACCESSORIES

FLARED CONNECTIONS

•This unit has flared connections on both indoor and outdoor sides.

•Remove the outdoor units valve cover, then connect the pipe.

•Refrigerant pipes are used to connect the indoor and outdoor units.

•Be careful not to crush or bend the pipe in pipe bending.

	Limits
Pipe length		20 m max.
Height difference		12 m max.
No. of bends		10 max.

•Refrigerant adjustment ... If pipe length exceeds 7 m, additional refrigerant (R410A) charge is required.

(The outdoor unit is charged with refrigerant for pipe length up to 7 m.)

	Up to 7 m	No additional charge is required.
Pipe length	Exceeding 7 m	Additional charge is required.
		(Refer to the table below.)
Refrigerant to be added		30 g/m ⋅ (refrigerant piping length (m) -5)

PIPING PREPARATION

1Specifications

Use the refrigerant pipes that meet the following specifications.

Pipe	Outside diameter	Insulation thickness	Insulation material
	mm	mm
For liquid	6.35	8	Heat resisting foam plastic
For gas	9.52	8	0.045 specific gravity

•Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm.

Never use any pipe with a thickness less than 0.8 mm, as the pressure resistance is insufficient.

2Ensure that the 2 refrigerant pipes are insulated to prevent condensation.

3 Refrigerant pipe bending radius must be 100 mm or more.

CAUTION

Be sure to use the insulation of specified thickness. Excessive thickness may cause incorrect installation of the indoor unit and lack of thickness may cause dew drippage.

Decide the installation position using mark on the installation plate indicating the indoor unit size as reference.

FINISHING AND TEST RUN

INSTALLATION INFORMATION FOR THE AIR CONDI- TIONER WITH R410A REFRIGERANT

•This room air conditioner adopts an HFC refrigerant (R410A) which will never destroy the ozone layer.

•Pay particular attention to the following points, though the basic installation procedure

is same as that for R22 air conditioners.

1As R410A has a working pressure approx. 1.6 times as high as that of R22, some special tools and piping parts / materials are required. (Refer to the table below.)

2Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and installation, since it is more susceptible to contaminations than R22.

3For refrigerant piping, use clean, pressure-proof parts / materials specifically designed for R410A. (Refer to 2. Refrigerant piping.)

4Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent composition change.

6-1 Tools dedicated for the air conditioner with R410A refrigerant

The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.

• Remove flare nuts attached to indoor and outdoor	Flare nut
units, then put them on pipe having completed
burr removal.
(not possible to put them on after flaring work)	Copper pipe

•Flare nut for R410A pipe differs from R22 pipe. Refer to the following table for detail.

mm	inch	R410A	R22
ø6.35	1/4	17	17
ø9.52	3/8	22	22

4Flaring work

•Carry out flaring work using flaring tool as shown below.

Flaring tool	A
		York
		Die
	Die
Clutch type Wing nut type	Copper pipe	Copper pipe
	Flare nut
	A (mm)

PURGING PROCEDURES

Connect the refrigerant pipes (both liquid pipe and the gas pipe) between the indoor and the outdoor unit.

Remove the service port cap of the stop valve on the side of the outdoor unit gas pipe. (The stop valve will not work in it initial state fresh out of the factory (totally closed with cap on).)

Connect the gauge manifold valve and the vacuum pump to the service port of the stop valve on the gas pipe side of the outdoor unit.

Run the vacuum pump. (Vacuumize for more than 15 minutes.)

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

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).

-0.101MPaCompound pressure

Stop valve (-760 mmHg) gauge (for R410A)

•Before performing the test run, recheck for any wrong wiring.

Wrong wiring prevents normal operation or results in blown fuse disabling operation.

•The test run can be started by pressing EMERGENCY OPERATION switch. When the EMERGENCY OPERATION switch is once pressed, the unit will start the test run

(continuous operation) for 30 minutes.

A thermostat does not work during this time. After 30 minutes the unit will start the EMERGENCY OPERATION at a fixed temperature setting of 24 °C in COOL MODE.

•Perform test run in the following procedure.

Note:

Insert the power supply plug into the power outlet and/or turn on the breaker. Check that both of the operation indicator lamps are not lit.

If they are blinking, the horizontal vanes are not installed correctly.

In this case, disconnect the power supply plug and/or turn off the breaker, and then reinstall the horizontal vanes. (See the OPERATING INSTRUCTIONS page 11.)

Horizontal vanes

Click.

7-1 HOW TO INSTALL THE FRONT PANEL

1Before installing the front panel, set the horizontal vane to the position as shown below.

2Insert the bottom of the front panel under the horizontal vane.

3 Set the top of the front panel.

4 Push as the arrow mark on the front panel to fix it to the air conditioner.

1Horizontal vane Slightly downward

4Push

3

1Connect gas cylinder to the service port of stop valve (3-way).

2Execute air purge of the pipe (or hose) coming from refrigerant gas cylinder.

3 Replenish specified amount of the refrigerant, while operating the air conditioner for cooling.

Note:

In case of adding refrigerant, comply with the quantity specified for the refrigerating cycle.

CAUTION

•Do not discharge the refrigerant into the atmosphere.

Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant circuit.

•For additional charging, charge the refrigerant from liquid phase of the gas cylinder.

If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the outdoor unit. In this case, ability of the refrigerating cycle decreases or normal operation can be impossible. However, charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.

To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm water (under 40°C) during cold season. But never use naked fire or steam.

Union

ACCESSORIES

Check the following parts before installation. <Indoor unit>

1	Installation plate	1
2	Installation plate fixing screw 4 ⋅ 25 mm	7
3	Remote controller holder	1
4	Fixing screw for 3 3.5 ⋅ 16 mm (Black)	2
5	Battery (AAA) for remote controller	2
6	Wireless remote controller	1
7	Felt tape (Used for left or left-rear piping)	1
8	Air cleaning filter	2
<Outdoor unit: For YV type only>
9	Drain socket	1

PART TO BE PROVIDED AT YOUR SITE

Optional extension pipe

	left	pipingback(usingspacer)
ormm79more	mm109ormoreforleftand
		182		m
		or	m		m
			ore
					1(A12YV)
				2
	left	pipingback(usingspacer)
ormm79more	mm109ormoreforleftand
		102		m
		or	m		m
			ore

1 (A09YV)

The figure refers to A09 YV.

182	mm		Be careful the
			drain hose is not
	or m	ore
			raised.

Piping can be directed towards rear, right, downward, left or left-rear

directions.

Front

Rear side Right

The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being charged into the unit. (Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.)

R410A tools	Can R22 tools be used?	Description
		R410A has high pressures beyond the meas-
		urement range of existing gauges.
Gauge manifold	No	Port diameters have been changed to prevent
		any other refrigerant from being charged into the
		unit.
Charge hose	No	Hose material and cap size have been changed
		to improve the pressure resistance.
Gas leak detector	No	Dedicated for HFC refrigerant.
Torque wrench	Yes	1/4 and 3/8
Flare tool	Yes	Clamp bar hole has been enlarged to reinforce
		the spring strength in the tool.
Flare gauge	New	Provided for flaring work (to be used with R22
		flare tool).
Vacuum pump		Provided to prevent the back flow of oil. This
	New	adapter enables you to use existing vacuum
adaptor
		pumps.

Outside diameter	Flare tool for R410A	Conventional flare tool
	clutch type	Clutch type	Wing nut type
ø6.35 mm	0 to 0.5	1.0 to 1.5	1.5 to 2.0
ø9.52 mm	0 to 0.5	1.0 to 1.5	1.5 to 2.0

•Firmly hold copper pipe in a die in the dimension shown in the table above.

5Check

•Compare the flared work with figure below.

•If flare is noted to be defective, cut off the flared section and do flaring work again.

Smooth all around Inside is shining without any scratches.

Even length all around

			Pressure gauge
*Close				(for R410A)
*Open	Stop valve				Gauge manifold
					valve (for R410A)
		Handle			Handle High
		Low			Charge hose
Hexagonal wrench		Stop			(for R410A)
	Service port	valve	Vacuum		(or the vacuum
			pump		pump with the
		Window
					function to
			Adapter for
		Charge hose			prevent the
*4 to 5 turns			preventing		back flow)
		(for R410A)
			the back flow

Remove the gauge manifold valve quickly from the service port of the stop valve.

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.

Pipe length up to 7 m	Pipe length exceeding 7 m
No gas charge is needed.	Charge the prescribed amount
	of gas. (refer to 3)

PROCEDURE

•Press the EMERGENCY OPERATION switch.

1Press it once, and after test run for 30 minutes the EMERGENCY COOL MODE starts.

If the left side lamp of the operation indicator blinks every 0.5 seconds, inspect the indoor/outdoor unit connecting wire A for mis-wiring.

2Press it once more, and the EMERGENCY HEAT MODE starts.

3 Press it once more, and the operation stops.

(The operation mode changes in order of 1 ~ 3 every time the EMERGENCY OPERATION switch is pressed.)

Mode Operation Indicator lamp
1 COOL
(Light)	(Off)

2

Horizontal vane

7-2 REMOVING THE INDOOR UNIT

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 below to release the hooks.

	Stop valve
Indoor unit	Liquid pipe
Refrigerant gas	Gas pipe	Outdoor unit
cylinder
operating valve	Service port
	Gauge manifold
	valve (for R410A)
	Charge hose (for R410A)
	Refrigerant gas cylinder
	for R410A with siphon
	Refrigerant (liquid)
	Electronic scale for
	refrigerant charging

A	Indoor/outdoor unit connecting wire					1
		(4-core 1.0 mm2)
B	Extension pipe					1
C	Wall hole sleeve					1
D	Wall hole cover					1
E	Pipe fixing band (The quantity depends					2 to 5
	on the pipe length.)
F	Fixing screw for E 4 ⋅ 20 mm (The					2 to 5
	quantity depends on the pipe length.)
G	Piping tape					1
H	Putty					1
I	Drain hose (or soft PVC. hose, 15 mm					1 or 2
	inner dia. or hard PVC pipe VP16)
J	Refrigeration oil					1
					800 mm
			150		500 mm
				mm	Air inlet
	mm					mm

2

8

5

			190	mm
				or
				more
				D
			H
	moreor	7 C
		6
8	7mm		3
			G
		4
Basically open 100 mm				E
or more without any
obstruction in front and
on both sides of the
unit.			F

Rear Left

Downward Left-rear

Lock the catch.

Separate the 2 connecting pipes and apply insulation individually.

8 mm thickness thermal insulation plastic

Electronic scale		It is difficult to measure R410A with a charging
for refrigerant	New	cylinder because the refrigerant bubbles due to
charging		high pressure and high-speed vaporization.

No: Not substitutable for R410A Yes: Substitutable for R410A

6-2 FLARING WORK

•Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.

1Pipe cutting

•Cut the copper pipe correctly with pipe cutter.

		No good
Copper pipe	Good	Tilted Uneven Burred
	90°

2

6-3 PIPE CONNECTION

Note:

Fasten a flare nut with a torque wrench as specified in the table below.

When fastened too tight, a flare nut may broken after a long period and cause a leakage of refrigerant.

1Indoor 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.

Pipe diameter	Tightening torque
mm	N·m	kgf·cm
ø6.35	13.7 to 17.7	140 to 180
ø9.52	34.3 to 41.2	350 to 420

2 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

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

	Retighten the cap.
	Leak test
	Tightening torque
	N·m	kgf·cm
Cap for service port	13.7 to 17.7	140 to 180
Cap for stop valve	19.6 to 29.4	200 to 300

2	HEAT
	(Off)	(Light)
3	STOP	EMERGENCY
		OPERATION switch
	(Off)	(Off)

•In starting the heating operation, indoor unit fan may not operate to prevent blowing cool air. Please wait for a few minutes until the temperature of heat exchanger rises and

warm air blows out.

Checking the remote (infrared) signal reception

Press the ON/OFF button on the remote controller and check that an electronic sound is heard from the indoor unit. Press the ON/OFF button again to turn the air conditioner off.

If the indoor unit is operated with the remote controller, both the test run and the emergency operation are released by commands from the remote controller.

•Once the compressor stops, the restart preventive device operates so the compressor will not operate for three minutes to protect the air conditioner.

6-6 EXPLANATION TO THE CUSTOMER

• Using the OPERATING INSTRUCTIONS, explain the following to the customer, how to

If the above method cannot be used

Remove the front panel and insert hexagonal wrenches into the square holes on the left and right as shown in the figure below, then push them up; the bottom of the indoor unit is lowered and the hooks are released.

Push Lower

344.5 285 mm	304 - 325
	Air outlet
	40 mm
2-10 mm ⋅ 21 mm slot

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

100	mm				more		When the piping is to be attached to a
					or
or				mm			wall containing metals (tin plated) or
more				100
							metal netting, use a chemically treated
				A		I	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.
		more			B
		or
		mm
		200	350	m
				m
				or	m
		Open two sides of left, right,			ore

or rear side.

	Burrs removal
•	Completely remove all burrs from the cut cross section of pipe.
•	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.

Burr	Copper pipe
	Spare
	reamer
	Pipe
	cutter

applied for indoor unit.

INSULATION AND TAPING

1Cover piping joints with pipe cover.

2For outdoor unit side, surely insulate every piping including valves.

3Using 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 for prevention of condensation.

control temperature, 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 customer to read the OPERATING INSTRUCTIONS carefully.

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	•	Low Voltage Directive 73/23/ EEC
the following EU regulations:	•	Electromagnetic Compatibility Directive 89/336/
		EEC

baffle board on the air outlet side of the outdoor unit.

Units should be installed by licensed contractor according to local code requirement.

HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN