General ABHA36LCT, AOHD36LATT, ABHA45LCT, AOHD45LATT, ABHA54LCT Installation Manual

AIR CONDITIONER

INDOOR UNIT

Ceiling type

INSTALLATION MANUAL

For authorized service personnel only.

Contents

1. SAFETY PRECAUTIONS 2

2. ABOUT THE UNIT 2

2.1.Precautions for using R410A refrigerant

2.2.Special tools for R410A

2.3.Accessories

2.4.Optional parts

3. INSTALLATION WORK 3

3.1.Selecting an installation location

3.2.Installation dimension

3.3.Installation the unit

4. PIPE INSTALLATION 6

4.1.Selecting the pipe material

4.2.Pipe requirement

4.3.Flare connection (pipe connection)

4.4.Installing heat insulation

5. INSTALLING DRAIN PIPES 8

6. ELECTRICAL WIRING 9

6.1.Electrical requirement

6.2.Wiring method

7. REMOTE CONTROLLER SETTING 11

7.1.Load batteries (R03/LR03 × 2)

7.2.Remote control unit holder installation

8. FUNCTION SETTING 11

8.1.Entering the function setting mode

8.2.Function setting

9.SELECTING THE REMOTE CONTROL UNIT

SIGNAL CODE 13 10. TEST RUN 14 11. CHECK LIST 14 12. ERROR CODES 15 13. SPECIAL INSTALLATION METHODS 16

14. FRESH-AIR INTAKE 16

15. CUSTOMER GUIDANCE 16

PART NO. 9379122009

1. SAFETY PRECAUTIONS

•Be sure to read this Manual thoroughly before installation.

•The warnings and precautions indicated in this Manual contain important information pertaining to your safety. Be sure to observe them.

•Hand this Manual, together with the Operating Manual, to the customer. Request the customer to keep them on hand for future use, such as for relocating or repairing the unit.

This mark indicates procedures which,

WARNING if improperly performed, might lead to the death or serious injury of the user.

•Request your dealer or a professional installer to install the indoor unit in accordance with this Installation

Manual. An improperly installed unit can cause serious accidents such as water leakage, electric shock, or fire. If the indoor unit is installed in disregard of the instructions in the Installation Manual, it will void the manufacturer’s warranty.

•Do not turn ON the power until all work has been completed. Turning ON the power before the work is completed can cause serious accidents such as electric shock or fire.

•If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contact with a flame, it produces a toxic gas.

•Installation work must be performed in accordance with national wiring standards by authorized personnel only.

		This mark indicates procedures which,
	CAUTION	if improperly performed, might possibly
		result in personal harm to the user, or
		damage to property.

2.ABOUT THE UNIT

2.1.Precautions for using R410A refrigerant

WARNING

•Do not introduce any substance other than the prescribed refrigerant into the refrigeration cycle. If air enters the refrigeration cycle, the pressure in the refrigeration cycle will become abnormally high and cause the piping to rupture.

•If there is a refrigerant leak, make sure that it does not exceed the concentration limit. If a refrigerant leak

exceeds the concentration limit, it can lead to accidents such as oxygen starvation.

•Do not touch refrigerant that has leaked from the refrigerant pipe connections or other area. Touching the refrigerant directly can cause frostbite.

•If a refrigerant leak occurs during operation, immediately vacate the premises and thoroughly ventilate the area. If the refrigerant comes in contact with a flame, it produces a toxic gas.

2.2. Special tools for R410A

WARNING

•To install a unit that uses R410A refrigerant, use dedicated tools and piping materials that have been manufactured specifically for R410A use. Because the pressure of R410A refrigerant is approximately 1.6 times higher than the R22, failure to use dedicated piping material or improper installation can cause rupture or injury.

Furthermore, it can cause serious accidents such as water leakage, electric shock, or fire.

	Tool name	Changes
		The pressure in the refrigerant
		system is extremely high and can-
		not be measured with a conven-
		tional gauge. To prevent erroneous
		mixing of other refrigerants, the
	Gauge manifold	diameter of each port has been
		changed. It is recommended to use
		a gauge manifold with a high
		pressure display range of –0.1 to
		5.3 MPa and a low pressure dis-
		play range of –0.1 to 3.8 MPa.
		To increase pressure resistance,
		the hose material and base size
	Charging hose	were changed.
		(The charging port thread diameter
		for R410A is 1/2 UNF 20 threads
		per inch.)
		A conventional vacuum pump can
		be used by installing a vacuum
		pump adapter.
	Vacuum pump	Be sure that the pump oil does
		not backflow into the system. Use
		one capable for vacuum suction of
		–100.7 kPa (5 torr, –755 mmHg).
	Gas leakage detector	Special gas leakage detector for
		R410A refrigerant .

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2.3. Accessories

WARNING

•For installation purposes, be sure to use the parts supplied by the manufacturer or other prescribed parts. The use of non-prescribed parts can cause serious accidents such as the unit falling, water leakage, electric shock, or fire.

•The following installation parts are furnished. Use them as required.

•Keep the Installation Manual in a safe place and do not discard any other accessories until the installation work has been completed.

Name and Shape	Q’ty	Description
Drain hose insulation		Adhesive type 70 × 230
	1
VT wire	1	For fixing the drain hose
		L : 280 mm
Coupler heat insulation		For indoor side pipe joint
(Large)	2	(Gas pipe)
Coupler heat insulation		For indoor side pipe joint
(Small)	1	(Liquid pipe)
Binder		For fixing the coupler heat
(Large)	4	insulator
Binder		For fixing the coupler heat
(Small)	4	insulator
Special nut A		For installing indoor unit
(Large flange)	4
Special nut B		For installing indoor unit
(Small flange)	4
Installation		For positioning the indoor
template	1	unit
Auxiliary pipe		For connecting the piping
assembly	1
Remote control		Use for air conditioner
unit		operation
	1
Battery (Penlight)		For remote control unit
	2
Remote control		Use as remote control unit
unit holder		holder
	1
Screw	2	For remote control unit
(M3 × 12)		holder installation

2.4. Optional parts

Exterior	Parts name	Model No.	Summary
	Wired		Unit control is per-
	remote	UTB-*UD	formed by wired
	controller		remote controller
	Round	UTD-RF204	For Ceiling type
	duct
	Drain
	pump	UTR-DPB241	For Ceiling type
	unit

3. INSTALLATION WORK

Especially, the installation place is very important for the split type air conditioner because it is very difficult to move from place to place after the first installation.

3.1. Selecting an installation location

Decide the mounting position together with the customer as follows.

WARNING

•Select installation locations that can properly support the weight of the indoor unit. Install the units securely so that they do not topple or fall.

CAUTION

•Do not install the indoor unit in the following areas:

•Area with high salt content, such as at the seaside. It will deteriorate metal parts, causing the parts to fall or the unit to leak water.

•Area filled with mineral oil or containing a large amount of splashed oil or steam, such as a kitchen. It will deteriorate plastic parts, causing the parts to fall or the unit to leak water.

•Area that generates substances that adversely affect the equipment, such as sulfuric gas, chlorine gas, acid, or alkali. It will cause the copper pipes and brazed joints to corrode, which can cause refrigerant leakage.

•Area that can cause combustible gas to leak, contains suspended carbon fibers or flammable dust, or volatile inflammables such as paint thinner or gasoline. If gas leaks and settles around the unit, it can cause a fire.

•Area where animals may urinate on the unit or ammonia may be generated.

•Do not install where there is the danger of combustible gas leakage.

•Do not install the unit near a source of heat, steam, or flammable gas.

•Install the indoor unit, outdoor unit, power supply cable, transmission cable, and remote control cable at least 1 m away from a television or radio receivers. The purpose of this is to prevent TV reception interference or radio noise. (Even if they are installed more than 1 m apart, you could still receive noise under some signal conditions.)

•If children under 10 years old may approach the unit, take preventive measures so that they cannot reach the unit.

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(1) Install the indoor unit on a place having a sufficient strength so that it withstands against the weight of the indoor unit.

(2) The inlet and outlet ports should not be obstructed; the air should be able to blow all over the room.

(3) Leave the space required to service the air conditioner.

(4) Install the unit where connection to the outdoor unit is easy.

(5) Install the unit where the connection pipe can be easily installed.

(6) Install the unit where the drain pipe can be easily installed.

(7) Install the unit where noise and vibrations are not amplified.

(8) Take servicing, etc., into consideration and leave the spaces. Also install the unit where the filter can be removed.

(9) Do not install the unit where it will be exposed to direct sunlight.

3.2.Installation dimension

•The ceiling rear height as shown in the figure.

	Ceiling
INDOOR UNIT
80 or over	Ceiling		150 or over
overor2500	overor1000	10 or over
	Obstruction
	Floor		Unit : mm

[FOR HALF CONCEALED INSTALLATION]

Ceiling panel

INDOOR UNIT

Ceiling panel
80 or over		150 or over
overor2500	or1000over	10 or over
	Obstruction

Floor	Unit : mm

3.3. Installation the unit

WARNING

•Install the air conditioner in a location which can withstand a load of at least five times the weight of the main unit and which will not amplify sound or vibration. If the installation location is not strong enough, the indoor unit may fall and cause injuries.

3.3.1. Preparing indoor unit installation

Remove the intake grille and side cover

(1) Remove the two Air filters.

(2) Remove the two Intake grilles.

For ○4 Left rear drain and ○5 Left drain: Remove air filters and intake grilles at three places.

(3) Remove the Side cover A (Right side) and Side cover B

(Right and Left side).

For ○5 Left drain: Remove both the Side cover A (Right and Left side).

(4) This air conditioner can be set up to intake fresh air. For information about how to install for fresh-air intake, refer to “14. FRESH-AIR INTAKE”.

Air filter

Intake grille

Tapping screw

INDOOR UNIT

Side cover (Left side)

Side cover A (Right side) Side cover B (Right side)

3.3.2. Indoor unit installation

•You can use the accessory template to help you install the indoor unit.

•The template helps you determine the appropriate locations for suspension bolts and pipe opening (drain pipe and connection cable).

Drilling position for Suspension bolt

Ceiling

Wall

Template

Drilling position for piping

3.3.3. Location of ceiling suspension bolts

30

Suspension bolt pitch 1600

30

Dimensions (Space Required for Installation)

10 155

INDOOR UNIT (TOP VIEW)

300

		Suspension bolt should
	INDOOR UNIT	extend outward 30 to 75 mm.
		Unit : mm

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[For Half-Concealed Installation]

• Suspension-bolt pitch should be as shown in the figure.

40

Ceiling Opening: 1580

40

Ceiling panel

Ceiling Opening: 640 15

Ceiling panel

	Suspension bolt should
INDOOR UNIT	extend outward 30 to 50 mm.

Unit : mm

3.3.4.Select piping direction

•Select connection piping and drain piping directions.

	5 Left piping	4 Left rear piping 2 Top piping
		(Drain pipe only) (Connection pipe only)
	(Drain pipe only)
		1 Right rear piping
	INDOOR UNIT (TOP VIEW)
		3 Right
		piping
		Cut off the piping outlet cutting groove
		with a hacksaw, etc.

[FOR ○4 Left rear piping, ○5 Left piping]

• Transfer the Drain cap and Drain cap seal.

Drain Cap seal

Drain Cap

Indoor Unit

Drain Pan

Drain Cap Seal Drain Cap

Push cap all the way on (as far as it will go).

3.3.5.Drilling the holes and attaching the suspension bolts

(1) Drill ø25 mm holes at the suspension-bolt locations.

(2) Install the bolts, then temporarily attach Special nuts A and

B and a normal M10 nut to each bolt. (The two special nuts are provided with the unit. The M10 nut must be obtained locally.) Refer to the figure.

Bolt Strength [N (kgf)]

980 to 1470 (100 to 150)

Ceiling panel

Special nut A (Included)
10 to 15
Special nut B (Included)
M10 Nut (Obtained locally)	Unit : mm

3.3.6. Installing the indoor unit

(1) Lift unit so that suspension bolts pass through the suspension fittings at the sides (four places), and slide the unit back.

Ceiling

Wall

Ceiling panel

Wall

INDOOR UNIT

(2) Fasten the indoor unit into place by tightening-up the special “B” bolts and the M10 nuts. Make sure that unit is secure and will not shift back and forth.

[For Half-Concealed Installation]

When installing the indoor unit in a semi-concealed orientation, make sure to reinforce the insulation of the unit on all sides. Drops of water may fall from the unit if it is not thoroughly insulated.

Glass wool insulate (10 to 20 mm thick)

INDOOR UNIT (TOP VIEW)

Wall

Ceiling panel

CAUTION

•In order to check the drainage, be sure to use a level during installation of the indoor unit. If the installation site of the indoor unit is not level, water leakage may occur.

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