General AUH18L, AUH18LBAB, AOH18LMAKL Installation Manual

SPLIT TYPE AIR CONDITIONER

(5-5/32”)

131 mm

(4-3/8”)

111 mm

47 mm (1-27/32”)

60 mm (2-3/8”)

Drain pipe (I. D. ø32 mm)

600 mm ( 23-5/8”) (Ceiling opening measurement)

46 mm (1-27/32”)

86 mm (3-3/8”)

250 mm (9-27/32”)

54 mm (2-1/8”)

INSTALLATION INSTRUCTION SHEET

STANDARD PARTS

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

INDOOR UNIT ACCESSORIES

Name and Shape

Coupler heat insulation

Special nut A (large flange)

Special nut B (small flange)

Template

Q’ty

For indoor side pipe joint

For installing indoor unit

For ceiling hole cutting

Application

GRILLE ACCESSORIES

Name and Shape

Bolt

Washer

Blower cover insulation

Q’ty

For mounting grille

For discharged air

Application

INSTALLATION PROCEDURE

Install the room air conditioner as follows:

INDOOR UNIT INSTALLATION

1. Position the ceiling hole and hanging bolts as shown in Fig. 3.

Fig. 3

( 650 mm) (Grille measurement)

650 mm (25-15/32”)

(

(Hanging bolt position)

400 mm (15-3/4”)

3. Body installation

(1) Install special nut A, then special nut B onto the hanging bolt. (Fig. 6) (2) Raise the body and mount its hooks onto the hanging bolt between

the special nuts. (Fig. 6) (3) Turn special nut B to adjust the height of the body. (Fig. 6) (4) Leveling

Using a level, or vinyl hose filled with water, fine adjust so that the

body is level.

WARNING

Perform final tightening by tightening the double nut firmly.

Fig. 6

Special nut A

After installing the body, tighten the nuts.

Special nut B

Hook

Note: Install the drain pipe.

••

• Install the drain pipe with downward gradient (1/50 to 1/100) and so

••

there are no rises or traps in the pipe.

••

• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32

••

mm (1-1/4”)] and connect it with adhesive (polyvinyl chloride) so that there is no leakage.

••

• When the pipe is long, install supporters.

••

• Do not perform air bleeding.

••

• Always heat insulate the indoor side of the drain pipe.

••

• When desiring a high drain pipe height, raise it up to 400 mm (15”) or

••

less from the ceiling within a range of 150 mm (6”) from the body. A rise dimension over this range will cause leakage.

INSTALLING DRAIN PIPE

Fig. 8

Supporter

(PART NO. 9374318025)

WARNING

CAUTION

The basic installation work procedures are the same as conventional refrigerant models. However, pay careful attention to the following points:

(1) Since the working pressure is 1.6 times higher than that of conventional refrigerant models, some of the piping and

installation and service tools are special. (See the table below.) Especially, when replacing a conventional refrigerant model with a new refrigerant R410A model, always replace the conventional piping and flare nuts with the R410A piping and flare nuts.

(2) Models that use refrigerant R410A have a different charging port thread diameter to prevent erroneous charging with con-

ventional refrigerant and for safety. Therefore, check beforehand. [The charging port thread diameter for R410A is 1/2 UNF 20 threads per inch.]

(3) Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with refrigerant models. Also, when

storing the piping, securely seal the openings by pinching, taping, etc.

(4) When charging the refrigerant, take into account the slight change in the composition of the gas and liquid phases, and

always charge from the liquid phase side whose composition is stable.

Special tools for R410A

Tool name

Gauge manifold

Charge hose

Vacuum pump

Gas leakage detector

This mark indicates procedures which, if improperly performed, might lead to the death or serious injury of the user.

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

This air conditioner uses new refrigerant HFC (R410A).

Contents of change

Pressure is high and cannot be measured with a conventional gauge. To prevent erroneous mixing of other refrigerants, the diameter of each port has been changed. It is recommended the gauge with seals –0.1 to 5.3 MPa (–76 cmHg to 53 kgf/cm2) for high pressure. –0.1 to 3.8 MPa (–76 cmHg to 38 kgf/cm2) for low pressure. To increase pressure resistance, the hose material and base size were changed. A conventional vacuum pump can be used by installing a vacuum pump adapter. Special gas leakage detector for HFC refrigerant R410A.

Remote control unit

Battery (penlight)

Remote control unit holder

Tapping screw (ø3 × 12)

Use for air conditioner operation

For remote control unit

For mounting the remote control unit

For remote control unit holder installation

606 mm (23-27/32”)

(Hanging bolt position)

440 mm (17-5/16”)

66 mm (2-19/32”)

2. Hanging preparations

Firmly fasten the hanging bolts as shown in Fig. 4 or by another method.

Fig. 4

Hole-in anchor Hole-in plug

Fig. 5

Concrete

Hanging bolt

M10

Insert

Fig. 7

Hanging bolt

15 mm (19/32”)

30 mm or more

Ceiling

Vinyl hose

Air bleeding

Rise

Trap

150 mm (6”) or less

1.5 to 2.0 m (5 to 6.5 ft)

Max. 400 mm (15”)

Copper pipes

It is necessary to use seamless copper pipes and it is desirable that the amount of residual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed or discolored portion (especially on the interior surface). Otherwise, the expansion valve or capillary tube may become blocked with contaminants. As an air conditioner using R410A incurs pressure higher than when using R22, it is necessary to choose adequate materials. Thicknesses of copper pipes used with R410A are as shown in Table 1. Never use copper pipes thinner than 0.8 mm (Nominal diameter is 1/4 in., 1/2 in.), even when it is available on the market.

Table 1 Thicknesses of Annealed Copper Pipes

Thickness (mm)

Nominal

diameter (inch)

1/4

1/2

Outer diameter

(mm)

6.35

12.70

R410A

0.80

For authorized service personnel only.

WARNING

(1) For the air conditioner to operate satisfactorily, install it as outlined in this installation instruction sheet.

(2) Connect the indoor unit and outdoor unit with the air conditioner piping and cords available from our standards parts. This

installation instruction sheet describes the correct connections using the installation set available from our standard parts.

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

(4) Do not turn on the power until all installation work is complete.

CAUTION

This installation instruction sheet describes how to the indoor unit only. To install the outdoor unit, refer to the installation instruction sheet included with the outdoor unit.

••

• Be careful not to scratch the air conditioner when handling it.

••

• After installation, explain correct operation to the customer, using the operating manual.

••

• Let the customer keep this installation instruction sheet because it is used when the air conditioner is serviced or moved.

••

SELECTING THE MOUNTING POSITION

Especially, the installation place is very important for the split type air conditioner because it is very difficult to move from place after the first installation. Decide the mounting position together with the customer as follows: The discharge direction can be selected as shown below.

Fig. 1

100 mm (4”) or more

(4 directions)

Piping position

(3 directions)

100 mm (4”) or more

directions

)

100 mm (4”) or more

1,000 mm (39”) or more

directions

)

CAUTION

Since 2-way outlet as shown below causes performance problems, do not set it.

Pipe

INDOOR UNIT

(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. (Fig. 2) (4) The ceiling rear height is 250 mm (9-3/8”) or more. (5) A place from where the air can be distributed evenly throughout the

room by the unit. (6) A place from where drainage can be extracted outdoors easily.

Fig. 2

Strong and durable ceiling

250 mm (9-3/8”) or more

1,000 mm (39”) or more

Obstruction

1,000 mm (39”) or more

CONNECTION PIPE REQUIREMENT

Table 2

Diameter

Small

6.35 mm (1/4 in.)

••

• Use pipe with water-resistant heat insulation.

••

CAUTION

Install heat insulation around both the gas and liquid pipes. Failure to do so may cause water leaks. Use heat insulation with heat resistance above 120 °C. (Reverse cycle model only) In addition, if the humidity level at the installation location of the refrigerant piping is expected to exceed 70%, install heat insulation around the refrigerant piping. If the expected humidity level is 70-80%, use heat insulation that is 15 mm or thicker and if the expected humidity exceeds 80%, use heat insulation that is 20 mm or thicker. If heat insulation is used that is not as thick as specified, condensation may form on the surface of the insulation. In addition, use heat insulation with heat conductivity of

0.045 W/(m·K) or less (at 20 °C).

Large

12.7 mm (1/2 in.)

ELECTRICAL REQUIREMENT

••

• Electric wire size:

••

Table 3

Connection cord (mm2)

••

• Always use H07RN-F or equivalent to the connection cord.

••

• Install the circuit breaker nearby the units. (Both indoor unit and out-

••

door unit)

MAX. 2.5

MIN. 1.5

CONNECTING THE PIPING

WARNING

Do not use the existing piping and flare nuts.

• If the existing materials are used, the pressure inside the refrigerant cycle will rise and cause breakage, injury, etc. (Use the special R410A materials.)

CAUTION

(1) Do not use mineral oil on flared part.

Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.

(2) While welding the pipes, be sure to blow dry nitrogen

gas through them.

1. FLARING

(1) Cut the connection pipe to the necessary length with a pipe cutter. (2) Hold the pipe downward so that cuttings will not enter the pipe and

remove the burrs.

(3) Insert the flare nut (always use the flare nut attached to the indoor

and outdoor units respectively) onto the pipe and perform the flare processing with a flare tool. Use the special R410A flare tool, or the conventional flare tool. When using the conventional flare tool, always use an allowance adjustment gauge and secure the A dimension shown in table 4.

Fig. 9

Check if [L] is flared uniformly and is not cracked or scratched.

Die

Pipe

Table 4 Pipe outside diameter

Pipe outside diameter

Flare tool for R410A, clutch type

6.35 mm (1/4 in.)

12.7 mm (1/2 in.)

A (mm)

0 to 0.5

2. Bending pipes

The pipes are snapped by your hands. Be careful not to collapse them.

Fig. 10

When bending the pipe, do not bend it as is. The pipe will be collapsed. In this case, cut the heat insulating pipe with a sharp cutter as shown in Fig. 11, and bend it after exposing the pipe. After bending the pipe as you want, be sure to put the heat insulating pipe back on the pipe, and secure it with tape.

Fig. 11

Heat insulating pipe

Cutter

Cut line

Pipe

CAUTION

(1) To prevent breaking of the pipe, avoid sharp bends.

Bend the pipe with a radius of curvature of 150 mm or over.

(2) If the pipe is bent repeatedly at the same place, it will

break.

3. Connection pipes

••

• Indoor unit side

••

Fig. 12

(1) Be sure to apply the pipe against the port on the in-

door unit correctly. If the centering is improper, the flare nut cannot be tightened smoothly. If the flare nut is forced to turn, the threads will be damaged.

(2) Do not remove the flare nut from the indoor unit pipe

unit immediately before connecting the connection pipe.

When the flare nut is tightened properly by your hand, hold the body side coupling with a separate spanner, then tighten with a torque wrench. (Fig.

13)

Fig. 13

Torque wrench

Indoor unit

Small pipe

Large pipe

CAUTION

Tighten with two wrenches.

Wrench (fixed)

Flare nut

Table 5 Flare nut tightening torque

Flare nut

Small pipe (6.35 mm dia.)

Large pipe (12.7 mm dia.)

Tightening torque

14 to 18 N·m (140 to 180 kgf·cm)

50 to 62 N·m (500 to 620 kgf·cm)

CAUTION

Be sure to connect the large pipe after connecting the small pipe completely.

INSTALLING THE COUPLER

HEAT INSULATION

After checking for gas leaks, insulate by wrapping insulation around the two parts (large and small) of the indoor unit coupling, using the coupler heat insulation.

Fig. 14

Coupler heat insulation

Body

Be sure to overlap the insulation

CAUTION

Must fit tightly against body without any gap.

No gap

Coupler heat insulation

Indoor unit pipe

Extend the pipe by unwinding it.

Do not bend the pipes in an angle more than 90°. When pipes are repeatedly bent or stretched, the material will harden, making it difficult to bend or stretch them any more. Do not bend or stretch the pipes more than three times.

Connection pipe

To prevent gas leakage, coat the flare surface with alkylbenzene oil (HAB). Do not use mineral oil.

- Continued on back -

Blower cover insulation

A-A Section view

Display PCB wire harness

Wire (Louver)

Grille hook

SWING TIMER OPERATION

MANUAL

AUTO

50.8

6-ø3.3 Self tapping screw holes (for 4mm)

P.D 170

130

284

45˚

ø150

(m3/min)

80 70 60

50 40

30 20 10

2468

AU18

AU12,14

L=5m

DUCT STATIC PRESSURE

(Pa)

(m3/min)

60 50 40 30

20 10

0 0.1 0.2 0.3

(Pa)

DUCT STATIC PRESSURE

400mm (15-3/4”)

606mm(23-27/32”)

720mm( 28-11/32”)

770mm ( 30-5/16”)

(Hanging bolt position)

(Ceiling opening measurement)

(Grille measurement)

(Hanging bolt position)

JM1

JM2

JM3

Green/Yellow

2(N)

EARTH

32(

ELECTRICAL WIRING

HOW TO CONNECT WIRING TO THE TERMINALS

A. For solid core wiring (or F-cable)

(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip

the insulation to about 25 mm (15/16”) of expose the solid wire.

(2) Using a screwdriver, remove the terminal screw(s) on the terminal

board.

(3) Using pliers, bend the solid wire to form a loop suitable for the

terminal screw.

(4) Shape the loop wire properly, place it on the terminal board and

tighten securely with the terminal screw using a screwdriver.

B. For strand wiring

(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip

the insulation to about 10 mm (3/8”) of expose the strand wiring.

(2) Using a screwdriver, remove the terminal screw(s) on the terminal

board.

(3) Using a round terminal fastener or pliers, securely clamp a round

terminal to each stripped wire end.

(4) Position the round terminal wire, and replace and tighten the ter-

minal screw using a screwdriver.

Fig. 15

A. Solid wire

Insulation

Strip 25 mm (15/16”)

Wire

B. Strand wire

Loop

Strip 10 mm (3/8”)

Screw with special washer

Round terminal

Terminal board

Wire

Round terminal

Screw with special washer

Round terminal

1. Indoor unit side

(1) Remove the control box cover and install the connection cord.

(Figs. 16 and 17)

Fig. 16

Control box cover

Fig. 17

Connection cord

Insulation tube

After passing the connection cord through the insulation tube, fasten it with the cord clamp.

Fig. 18

Indoor unit side terminal

Connection cord

Power supply

Terminal boardCord clamp

Insulation tube (Use VW-1,

0.5 to 1.0 mm thick, PVC tube as the insulation tube)

Cord clamp

Outdoor unit side terminal

Connection cord

GRILLE INSTALLATION

1. Blower cover insulation

Install the blower cover insulation only when the outlet direction is not specified. Two blower cover insulations are packed with the grille assembly. Install the blower cover insulation at the diffuser position shown in Fig. 19. At the time, use the piping position as the criteria.

Fig. 19

2 direction example

Fit the blower cover insulation.

(Piping direction)

2. Installing grille assembly to body

Hang the grille assembly on the wires attached to the indoor unit as shown in Fig. 20.

Fig. 20

Wire Wire hook

Wire hook

Motor cover assembly

Wire

Bolting the grille assembly to the body

Install the grille assembly to the body with the four bolts, spring washers, and washers.

Fig. 21

Washer

Bolt

No gap between ceiling and grille around entire periphery.

Wireless unit connection wire wiring

Connect the connector in accordance part A detail view. Then clamp the lead wire with clamp so that it does not touch the rotating parts.

Fig. 22

Fig. 23 Part A detail view

Display PCB wire harness

Joint wire (Louver)

INSTALLING/REMOVING THE INTAKE GRILLE

1. Installing the intake grille

(1) Fully insert the intake grille hooks into the rectangular holes in the

panel.

Fig. 24

Panel

Rectangular hole

Grille hook

Intake grille

(2) Close the intake grille, then slide the two grille stoppers outward.

Fig. 25

Grille stopper

2. Removing the intake grille

(1) Slide the two grille stoppers inward, then open the intake grille.

Fig. 26

Grille stopper

(2) Remove the grille hook screws, then open the intake grille.

Fig. 27

(3) Open the intake grille so that it is at an angle of 20° to 40°, then

remove the grille.

Fig. 28

CAUTION

(1) The louver angle cannot be changed if the power is not

on, (If moved by hand, it may be damaged.)

(2) The grille assembly is directional relative to the air con-

ditioner body.

(3) Install so that there is no gap between the grille as-

sembly and the air conditioner body.

REMOTE CONTROL UNIT

INSTALLATION

••

• Install the remote control unit so that the front is facing the photocell.

••

(Fig. 29)

Fig. 29

Photocell

Remote control unit

••

• Install the remote control unit with a distance of 5 m between the re-

••

mote control unit and the grille photocell as the criteria. However, when installing the remote control unit, check that it operates positively.

CAUTION

(1) Check that the indoor unit correctly receives the sig-

nal from the remote control unit, then install the remote control unit holder.

(2) Select the remote control unit holder selection site by

paying careful attention to the following: Avoid places in direct sunlight. Select a place that will not be affected by the heat from a stove, etc.

1. REMOTE CONTROL UNIT HOLDER INSTALLATION

• Install the remote control unit holder to a wall, pillar, etc. with the tap-

ping screws.

Fig. 30

Remote Control Unit mounting

Remote control unit holder

Tapping screws (small)

Remote Control Unit holder fixing

1 Set

2 Push

Remote control unit

2. SWITCHING REMOTE CONTROL UNIT SIGNAL CODES

• Air conditioner settings

Fig. 31

Indoor unit Printed circuit board

• Remote control unit settings

(1) Press the START/STOP button and display only the clock.

Fig. 32

(2) Press the MASTER CONTROL button continuously for more than five

seconds to display the current signal code.

Fig. 33

(3) Change the signal code with the button ( ).

Fig. 34

(4) Press the MASTER CONTROL button again to return to the clock

display and change the signal code.

Confirm the setting of the remote control unit signal code and the printed circuit board setting. If these are not confirmed, the remote control unit cannot be used to operate for the air conditioner.

Table 6

Jumper wire

JM2

Connect

Disconnect

JM3

Connect

Disconnect

Connect

Disconnect

Remote control unit

signal code

A (Primary setting)

• Perform test operation and check items (1) to (5) below.

• For the operation method, refer to the operating manual.

• The outdoor unit may not run, depending on the room temperature.

In this case, the ‘TEST RUN’ signal is received during air conditioner operation (use a metallic object to short the two metal contacts under the battery compartment lid and send the ‘TEST RUN’ signal from the remote control unit).

TEST RUNNING

Fig. 35

Short the two metal contacts under the battery compartment lid.

• To end test operation, press the remote control unit START/STOP button. (When the air conditioner is run by pressing the remote control unit TEST RUN button, the OPERATION and TIMER lamps will simultaneously flash slowly.)

SWING LAMP (Orange)

Operation can be checked by lighting and flashing of the grille display section OPERATION and TIMER lamps. Perform judgment in accordance with the following.

• Test running

When the air conditioner is run by pressing the remote control unit test run button, the OPERATION and TIMER lamps flash slowly at the same time.

TIMER LAMP (Green)

OPERATION LAMP (Red)

• Error The OPERATION, TIMER and SWING lamps operate as follows

(Table 7) according to the error contents.

Table 7

Error contents

Indoor EEPROM abnormal Outdoor EEPROM abnormal Indoor room temperature sensor

open Indoor room temperature sensor

shortcircuited Indoor heat exchanger temperature

sensor open Indoor heat exchanger temperature

sensor shortcircuited Float switch operated Indoor signal abnormal Outdoor signal abnormal Indoor fan abnormal Outdoor power source connection

abnormal Outdoor heat exchanger

temperature sensor error Outdoor temperature sensor error Outdoor discharge pipe

temperature sensor error Outdoor high pressure abnormal Outdoor discharge pipe

temperature abnormal

: 0.1s ON/0.1s OFF (flash) : OFF

: 0.5s ON/0.5s OFF (flash)

OPERATION

lamp (RED)

(2 times)

(3 times)

(4 times) (5 times) (5 times) (6 times)

TIMER lamp

(GREEN)

(2 times)

(3 times)

(4 times)

(5 times)

(6 times)

(7 times)

SWING lamp

(ORANGE)

CHECK ITEMS

INDOOR UNIT

(1) Is operation of each button on the remote control unit normal? (2) Does each lamp light normally? (3) Do not air flow direction louvers operate normally? (4) Is the drain normal? (5) Is there any abnormal noise and vibration during operation?

OPENING THE DUCT CONNECTION HOLE

Fig. 36

Distribution duct

CAUTION

(1) When performing hole opening work, be careful not to

damage the drain pan.

(2) When connecting the distribution duct, to make the air

flow easily, block the outlet port with the blower cover insulation as shown by the hatched lines in fig. 36. For the blocking direction, refer to Fig. 19.

1. DIMENSION

(1) Fresh air duct connection hole and screw positions.

Fig. 37

Fresh air

Distribution duct

Unit: mm

CAUTION

The air conditioner cannot take in fresh air by itself. When connecting a fresh air duct, always use a duct fan.

OUTLET AIR

Fig. 39

Duct (inside dia. 150 mm)

FRESH AIR

Fig. 40

Duct

Duct Fan

Static pressure required to take in fresh air

INSTALLING THE OPTION

PARTS (ADDITIONAL GRILLE)

THE ADDITIONAL GRILLE

• Mount the assembled additional grille to the indoor unit (grille) that has been removed from the main unit.

• Make sure all areas are properly installed the reinforcement plate.

• Mount 4 additional grilles. (Fig. 42)

• After confirming proper meshing of the additional grilles, secure them

in place using the 8 screws provided.

Fig. 41

Screw (short)

Additional grille

Fig. 42 Illustration of completed mounting

POSITION THE CEILING HOLE AND HANGING BOLTS

Fig. 43

Screw (long)

Additional grille

Reinforcement plate

Indoor unit (grille)

Reinforcement plate

Indoor unit (grille)

• Do not operate the air conditioner in the running state for a long time.

(2) Distribution duct connection hole and screw positions.

Fig. 38

Unit: mm

CAUTION

When installing the additional grille, please refer to the installation instruction sheet supplied with the additional grille.

PART NO. 9374318025