Panasonic U-96MF1U9E, U-72MF1U9, U-52LE1U6, U-36LE1U6, S-54MF1U6 Installation Instructions

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INSTALLATION INSTRUCTIONS

VRF System Air Conditioner

This air conditioner uses the refrigerant R410A.

NOTE

External diameter of service port R410A: 5/16"

Model No.

Indoor Units

Type Indoor Unit Type 7 9 12 15 18 19 24 36 48 54

U1 4-Way Cassette

4-Way Cassette

60 × 60

D1 1-Way Cassette

Low Silhouette

Ducted

Slim Low Static

Ducted

High Static

Pressure Ducted

T1 Ceiling

K1 Wall Mounted

P1 Floor Standing

Concealed Floor

Standing

S-12MU1U6 (CZ-36KPU2U)**

S-12MY1U6 (CZ-18KPY1U)**

S-07MD1U6 (CZ-12KPD1U)**

S-07MF1U6 S-09MF1U6 S-12MF1U6 S-15MF1U6 S-18MF1U6 S-24MF1U6 S-36MF1U6 S-48MF1U6 S-54MF1U6

S-07MM1U6 S-09MM1U6 S-12MM1U6 S-15MM1U6 S-18MM1U6

S-07MK1U6 S-09MK1U6 S-12MK1U6 S-18MK1U6 S-19MS1U6* S-24MK1U6

S-07MP1U6 S-09MP1U6 S-12MP1U6 S-15MP1U6 S-18MP1U6 S-24MP1U6

S-07MR1U6 S-09MR1U6 S-12MR1U6 S-15MR1U6 S-18MR1U6 S-24MR1U6

S-09MD1U6 (CZ-12KPD1U)**

S-12MD1U6 (CZ-12KPD1U)**

S-12MT1U6 S-18MT1U6 S-24MT1U6

S-18MU1U6 (CZ-36KPU2U)**

S-18MY1U6 (CZ-18KPY1U)**

S-24MU1U6 (CZ-36KPU2U)**

S-36MU1U6 (CZ-36KPU2U)**

S-36ME1U6 S-48ME1U6

* Necessary to install the External Electronic Expansion Valve Kit (Optional : CZ-P56SVK1U) ** Panel (optional parts)

Optional Controllers

Timer Remote Controller CZ-RTC2

Wireless Remote Controller (For F1, M1, E1, P1, R1 Types) CZ-RWSC1U

Wireless Remote Controller (For U1 Type) CZ-RWSU1U

Wireless Remote Controller (For Y1 Type) CZ-RWSY1U

Wireless Remote Controller (For D1, T1 Types) CZ-RWST1U

Wireless Remote Controller (For K1 Type) CZ-RWSK1U

Simpliﬁ ed Remote Controller CZ-RE2C2

System Controller CZ-64ESMC1U

Schedule Timer CZ-ESWC2

Intelligent Controller CZ-256ESMC1U

Communication Adaptor CZ-CFUNC1U

Remote Sensor CZ-CSRC2

LonWorks Interface CZ-CLNC1U

85464369530011 CV6233187013

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IMPORTANT! Please Read Before Starting

This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the

system so it operates safely and efﬁ ciently.

For safe installation and trouble-free operation, you must:

● Carefully read this instruction booklet before beginning.

● Follow each installation or repair step exactly as shown.

● Observe all local, state, and national electrical codes.

● Pay close attention to all warning and caution notices

given in this manual.

thin aluminum ﬁ ns on the air conditioner can cut your ﬁ ngers.

When Installing…

Select an installation location which is rigid and strong enough to support or hold the unit, and select a location for easy maintenance.

…In a Room

Properly insulate any tubing run inside a room to prevent “sweating” that can cause dripping and water damage to walls and ﬂ oors.

Keep the ﬁ re alarm and the air

CAUTION

outlet at least 5 feet away from the unit.

This symbol refers to a hazard or

WARNING

CAUTION

unsafe practice which can result in severe personal injury or death.

This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage.

If Necessary, Get Help

These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certiﬁ ed dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper installation or maintenance service, including

failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

WARNING

Do not supply power to the unit until all wiring and tubing • are completed or reconnected and checked.

Highly dangerous electrical voltages are used in this • system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or

death. Ground the unit• following local electrical codes.

Connect all wiring tightly. Loose wiring may cause over-• heating at connection points and a possible ﬁ re hazard.

To prevent possible hazards from insulation failure, • the unit must be grounded.

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or

When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

…In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents

water damage and abnormal vibration.

…In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air bafﬂ e.

…In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

Ventilate the room well, in the event that is refrigerant gas • leaks during the installation. Be careful not to allow contact of the refrigerant gas with a ﬂ ame as this will cause the generation of poisonous gas.

Keep all tubing runs as short as possible.• Use the ﬂ are method for connecting tubing.• Apply refrigerant lubricant to the matching surfaces of •

the ﬂ are and union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection.

Check carefully for leaks before starting the test run.•

When performing piping work • do not mix air except for specifIed refrigerant (R410A) in refrigeration cycle. It causes capacity down, and risk of explosion and injury due to high

WARNING

Do not leak refrigerant while piping work for an • installation or re-installation, and while repairing refrigeration parts. Handle liquid refrigerant carefully as it may cause

frostbite.

tension inside the refrigerant cycle. Refrigerant gas leakage may • cause ﬁ re. Do not add or replace •

refrigerant other than speciﬁ ed type. It may cause product damage, burst and injury etc.

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When Servicing

Turn the power OFF at the main power box (mains) • before opening the unit to check or repair electrical parts and wiring.

Keep your ﬁ ngers and clothing away from any moving • parts.

Clean up the site after you ﬁ nish, remembering to check • that no metal scraps or bits of wiring have been left inside the unit being serviced.

WARNING

Do not clean inside the indoor and • outdoor units by users. Engage authorized dealer or specialist for cleaning.

In case of malfunction of this • appliance, do not repair by yourself. Contact to the sales dealer or service dealer for a repair.

Others

CAUTION

Do not touch the air inlet or the • sharp aluminum ﬁ ns of the outdoor unit. You may get injured. Ventilate any enclosed areas when • installing or testing the refrigeration system. Escaped refrigerant gas, on contact with ﬁ re or heat, can produce dangerously toxic gas.

Conﬁ rm after installation that no • refrigerant gas is leaking. If the gas comes in contact with a burning stove, gas water heater, electric room heater or other heat source, it can cause the generation of poisonous gas.

Do not touch the air inlet or the • sharp aluminum ﬁ ns of the outdoor unit. You may get injured. Do not sit or step on the unit, you • may fall down accidentally.

Do not stick any object into the • FAN CASE. You may be injured and the unit may be damaged.

Check of Density Limit

The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out, its density will not exceed a set limit.

The refrigerant (R410A), which is used in the air conditioner, is safe, without the toxicity or combustibility of ammonia, and is not restricted by laws imposed to protect the ozone layer. However, since it contains more than air, it poses the risk of suffocation if its density should rise excessively. Suffocation from leakage of refrigerant is almost non-existent. With the recent increase in the number of high density buildings, however, the installation of multi air conditioner systems is on the increase because of the need for effective use of ﬂ oor space, individual control, energy conservation by curtailing heat and carrying power, etc. Most importantly, the multi air conditioner system is able to replenish a large amount of refrigerant compared to conventional individual air conditioners. If a single unit of the multi air conditioner system is to be installed in a small room, select a suitable model and installation procedure so that if the refrigerant accidentally leaks out, its density does not reach the limit (and in the event of an emergency, measures can be made before injury can occur).

ASHRAE and the International Mechanical Code of the ICC as well as CSA provide guidance and deﬁ ne safeguards related to the use of refrigerants, all of which deﬁ ne a Refrigerant Concentration Level (RCL) of 25 pounds per 1,000 cubic feet for R410A refrigerant. For additional guidance and precautions related to refrigerant safety, please refer to the following documents:

International Mechanical Code 2009 (IMC-2009) (or more recently revised) ASHRAE 15 ASHRAE 34

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CONTENTS

Page Page

IMPORTANT! .................................................................2

Please Read Before Starting Check of Density Limit

1. GENERAL ...................................................................5

1-1. Tools Required for Installation (not supplied) 1-2. Accessories Supplied 1-3. Type of Copper Tube and Insulation Material 1-4. Additional Materials Required for Installation

2. SELECTING THE INSTALLATION SITE ...................9

2-1. Indoor Unit

3. HOW TO INSTALL THE INDOOR UNIT ...................10

4-Way Cassette Type (U1 Type ■ )

3-1. Preparation for Suspending 3-2. Suspending the Indoor Unit 3-3. Placing the Unit Inside the Ceiling 3-4. Installing the Drain Piping 3-5. Checking the Drainage 3-6. How to Install the Ceiling Panel 3-7. Special Remarks

4-Way Cassette 60 ■ × 60 Type (Y1 Type)

3-8. Preparation for Suspending 3-9. Suspending the Indoor Unit 3-10. Placing the Unit Inside the Ceiling 3-11. Installing the Drain Piping 3-12. Checking the Drainage 3-13. How to Install the Ceiling Panel

1-Way Cassette Type (D1 Type ■ )

3-14. Suspending the Indoor Unit 3-15. Placing the Unit Inside the Ceiling 3-16. Installing the Drain Piping 3-17. Checking the Drainage 3-18. Electrical Power Wiring 3-19. How to Install the Ceiling Panel

Low Silhouette Ducted Type (F1 Type ■ )

3-20. Required Minimum Space for Installation and Service 3-21. Suspending the Indoor Unit 3-22. Installing the Drain Piping 3-23. Checking the Drainage 3-24. Increasing the Fan Speed 3-25. When Installing the Indoor Unit 3-26. Required Minimum Space for Installation and Service

Slim Low Static Ducted Type (M1 Type ■ )

3-27. Required Minimum Space for Installation and Service 3-28. Preparations Before Installation 3-29. For Bottom Intake 3-30. Installing the Duct 3-31. Suspending the Indoor Unit 3-32. Installing the Drain Piping 3-33. Checking the Drainage 3-34. Increasing the Fan Speed

High Static Pressure Ducted Type (E1 Type ■ )

3-35. Required Minimum Space for Installation and Service 3-36. Suspending the Indoor Unit 3-37. Installing the Drain Piping 3-38. Caution for Ducting Work 3-39. Indoor Fan Performance

Ceiling Type (T1 Type ■ )

3-40. Required Minimum Space for Installation and Service 3-41. Suspending the Indoor Unit 3-42. Duct for Fresh Air 3-43. Shaping the Tubing 3-44. Installing the Drain Piping

Wall Mounted Type (K1 Type ■ )

3-45. Removing the Rear Panel from the Unit 3-46. Selecting and Making a Hole 3-47. Installing the Rear Panel onto the Wall 3-48. Removing the Grille to Install the Indoor Unit 3-49. Preparing the Tubing 3-50. Shaping the Tubing 3-51. Installing the Drain Hose 3-52. When Using Wireless Remote Controller Instead of

Wired Remote Controller

3-53. External Electronic Expansion Valve Kit

(CZ-P56SVK1U)

Floor Standing Type (P1 Type) ■ Concealed Floor Standing Type (R1 Type)

3-54. Required Minimum Space for Installation and Service 3-55. Dimensions and Part Names 3-56. Removing and Attaching the Front Panel

(Floor Standing Type) 3-57. Installing the Refrigerant Tubing 3-58. Installing the Drain Piping 3-59. Installing the Remote Controller

SUPPLEMENT ON DRAIN PIPIN ■ G

4. ELECTRICAL WIRING ............................................63

4-1. General Precautions on Wiring 4-2. Recommended Wire Length and Wire Diameter for

Power Supply System 4-3. Wiring System Diagram 4-4. Important Note When Wiring for Common Type 4-5. Important Note When Wiring for Y1 Type

5. HOW TO PROCESS TUBING ..................................71

5-1. Connecting the Refrigerant Tubing 5-2. Connecting Tubing Between Indoor and Outdoor Units 5-3. Insulating the Refrigerant Tubing 5-4. Taping the Tubes 5-5. Finishing the Installation

6. APPENDIX ................................................................75

NAME OF PARTS ■ Care and Cleanin ■ g Troubleshootin ■ g Tips for Energy Savin ■ g

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1. GENERAL

This booklet brieﬂ y outlines where and how to install the air conditioning system. Please read over the entire set of instructions for the outdoor unit and make sure all accessory parts listed are with the system before beginning.

1-1. Tools Required for Installation (not supplied)

1. Flathead screwdriver

2. Phillips head screwdriver

3. Knife or wire stripper

4. Tape measure

5. Level gauge

6. Sabre saw or key hole saw

7. Hacksaw

8. Core bits

9. Hammer

10. Drill

11. Tube cutter

12. Tube flaring tool

13. Torque wrench

14. Adjustable wrench

15. Reamer (for deburring)

1-2. Accessories Supplied

See Tables 1-1 – 1-9.

1-3. Type of Copper Tube and Insulation Material

If you wish to purchase these materials separately from a local source, you will need:

1. Deoxidized annealed copper tube for refrigerant tubing.

2. Foamed polyethylene insulation for copper tubes as required to precise length of tubing. Wall thickness of the insulation should be not less than 5/16 in.

3. Use insulated copper wire for field wiring. Wire size varies with the total length of wiring. Refer to “4. ELECTRICAL WIRING” for details.

Check local electrical codes and

CAUTION

regulations before obtaining wire.

Also, check any speciﬁ ed

instructions or limitations.

1-4. Additional Materials Required for Installation

1. Refrigeration (armored) tape

2. Insulated staples or clamps for connecting wire (See your local codes.)

3. Putty

4. Refrigeration tubing lubricant

5. Clamps or saddles to secure refrigerant tubing

6. Scale for weighing

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Table 1-1 (4-Way Cassette)

Part Name Figure Q’ty Remarks

Full-scale installation diagram 1 Printed on container box

Drain hose

Hose band 1 For securing drain hose

Drain insulator

Flare insulator

Insulating tape

Packing

Wiring cover

Screw

Washer

Screw

White

(heat-resisting)

1 For securing drain hose

1 For drain joint

1 For liquid tube

1 For gas tube

2 For gas tube joint

1 For drain joint

1 For covering electrical wiring

4 For full-scale installation diagram

8 For suspending indoor unit from ceiling

1 For ﬁ xing the wiring cover

Table 1-2 (1-Way Cassette)

Part Name Figure Q’ty Remarks

Full-scale installation diagram

Drain hose

Hose band

Drain insulator 1 For drain joint

Flare insulator

Insulating tape

Packing 1 For drain joint

Washer 8 For suspending indoor unit from ceiling

Screw

Bushing 1 For electrical junction box

White

(heat-resisting)

1 Printed on container box

1 For securing drain hose

1 For liquid tube

1 For gas tube

2 For gas tube joint

4 For full-scale installation diagram

Table 1-3 (Low Silhouette Ducted)

Part Name Figure Q’ty Remarks

Drain hose

Hose band

Packing 1 For drain joint

Drain insulator 1 For drain joint

Flare insulator

Insulating tape

Flare insulator

Washer

Sealing putty

Vinyl clamp 8 For ﬂ are and drain insulators

White

(heat-resisting)

Use M10 or 3/8" for suspending bolts. ● Field supply for suspending bolts and nuts. ●

1 For securing drain hose

1 For liquid tube

2 For gas and liquid tubes ﬂ are nuts

1 For gas tube

8 For suspending indoor unit from ceiling

1 For sealing recessed portion of power supply

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Table 1-4 (High Static Pressure Ducted)

Part Name Figure Q’ty Remarks

Washer

Nut

Flare insulator

Drain socket 1 For drain pipe connection

8 For suspending indoor unit from ceiling

1 For gas tube

1 For liquid tube

Table 1-5 (Ceiling)

Part Name Figure Q’ty Remarks

Full-scale installation diagram

Washer

Flare insulator

Insulating tape

Vinyl clamp

Drain hose

Hose band

Drain insulator

Gum eyelet

T1/8"

T3/16"

White

(heat-resisting)

L5-1/2"

1 Printed on container box

4 For temporarily suspending indoor unit from ceiling

For gas and liquid tube joints

2 For gas and liquid tubes ﬂ are nuts

8 For ﬂ are and drain insulators

1 For main unit and PVC pipe joints

2 For drain hose connection

1 For drain hose joint

2 For power supply inlet and 3 way wiring inlet

Table 1-6 (Wall Mounted)

Part Name Figure Q’ty Remarks

Tapping screw

Plastic cover

Insulator

5/32" × 1"

10 For ﬁ xing the rear panel

1 For improved tubing appearance

1 For insulating ﬂ are nut (1862, 1962, 2452)

Table 1-7 (4-Way Cassette 60 × 60)

Part Name Figure Q’ty Remarks Part Name Figure Q’ty Remarks

Washer 8

Flare insulation

Insulation tie

Vinyl tie

Drain hose insulation

T10

T3 T5

For temporarily suspending indoor unit from ceiling

For gas / liquid

set

tube connection

For gas / liquid

tube / ﬂ are nut connection

For ﬂ are / drain

insulating connection

For drain tube

connection

Full-scale installation diagram

Washer head screw

Drain hose

Hose band 2

L140

Printed on

container box

For full-scale

installation diagram

For unit & PVC

tube connection

For drain hose connection

Use M10 or 3/8" for suspending bolts. ● Field supply for suspending bolts and nuts. ●

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Table 1-8 (Slim Low Static Ducted)

Part Name Figure Q’ty Remarks

Washer

Flare insulation

Insulation tape

Vinyl tie

Drain hose insulation

Drain hose

Hose band

Short circuit connection

T10

L140

8 For suspension ﬁ tting

2 set For gas / liquid tube connection

2 For gas / liquid tube / ﬂ are nut connection

8 For ﬂ are / drain insulating connection

1 For drain tube connection

1 For unit & PVC tube connection

2 For drain hose connection

Table 1-9 (Floor Standing & Concealed Floor Standing)

Part Name Figure Q’ty Remarks

Connection pipe

Flare insulator

Insulating tape

(White)

(Black)

1 For connecting gas tubes

2 For gas and liquid tubes

2 For gas and liquid tube ﬂ are nuts

2 For gas and liquid tubes

For high static pressure (Located on the back of the electrical component box lid.)

Vinyl clamp

Insulating tape (black and long) 1 For drain pipe

Drain insulator 1 For drain hose joint

Binding strap

7 For ends of ﬂ are insulator

Use M10 or 3/8" for suspending bolts. ● Field supply for suspending bolts and nuts. ●

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2. SELECTING THE INSTALLATION SITE

NOTE

2-1. Indoor Unit

Slim Low Static Ducted Type Low Silhouette Ducted (High Static Pressure) Type 4-Way Cassette (60 × 60) Type

AVOID:

areas where leakage of ﬂ ammable gas may be expected. ●

places where large amounts of oil mist exist. ●

direct sunlight. ●

locations near heat sources which may affect the ●

performance of the unit.

locations where external air may enter the room directly. This ●

may cause “sweating” on the air discharge ports, causing

them to spray or drip.

locations where the remote controller will be splashed with ●

water or affected by dampness or humidity.

installing the remote controller behind curtains or furniture. ●

locations where high-frequency emissions are generated. ●

DO:

select an appropriate position from which every corner of the ●

room can be uniformly cooled.

select a location where the ceiling is strong enough to ●

support the weight of the unit.

select a location where tubing and drain pipe have the ●

shortest run to the outdoor unit.

allow room for operation and maintenance as well as ●

unrestricted air ﬂ ow around the unit.

install the unit within the maximum elevation difference above ●

or below the outdoor unit and within a total tubing length (L)

from the outdoor unit as detailed in the installation manual

packed with the outdoor unit.

allow room for mounting the remote controller about 3 ft. off ●

the ﬂ oor, in an area that is not in direct sunlight nor in the

ﬂ ow of cool air from the indoor unit.

The elevation (Low Silhouette Ducted, Slim Low Static ●

Ducted) between the bottom unit and the ﬂ oor surface should

be at least 8 feet.

If the elevation (Low Silhouette Ducted, Slim Low Static ●

Ducted) between them is less than 8 feet, install a ﬁ lter

(optional/ﬁ eld supply) or a protective device (ﬁ eld supply) not

to touch the electrical parts or fan with hands.

The air intake and outtake openings should be provided with ●

the same location of a room.

10 in.

3 ft.

Fig. 2-1

Min.8 ft.

Shows Low Silhouette Ducted Type and Slim Low Static Ducted Type

Fig. 2-2

Wall Mounted Type

Min. 6 in.

Front View

Min. 6 in.

Fig. 2-3

Floor Standing, Concealed Floor Standing Type

min. 3-15/16"

min. 3.3 ft.

Horizontal view Vertical view

min. 3-15/16"

min. 3.3 ft.

Fig. 2-4

Ceiling Type

Ceiling

Wall

Min. 10 in. Min. 10 in.

Front view

The rear of the indoor unit can be installed ﬂ ush against the wall.

Air discharge

Min. 2 ft.

Side view

Air intake

Max. 10 in. Obstacle

Fig. 2-5

1-Way Cassette Type

Min. 3 ft.

Ceiling

Min. 2 in.

Wall

Fig. 2-6

Air discharge

Air intake

Min. 2 in.

Side view

Wall

Air delivery will be degraded if the distance from the ﬂ oor to the ceiling is greater than 10 ft.

Obstacle

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3. HOW TO INSTALL THE INDOOR UNIT

Full-scale installation diagram (printed on top of container box)

Supplied bolt

Over 19/32 (15)

15/32 – 43/64

(12 – 17)

4-Way Cassette Type (U1 Type) ■

3-1. Preparation for Suspending

This unit uses a drain pump. Use a level gauge to check that the unit is level.

3-2. Suspending the Indoor Unit

(1) Fix the suspension bolts securely in the ceiling using the method

shown in the diagrams (Figs. 3-1 and 3-2), by attaching them to the ceiling support structure, or by any other method that ensures that the unit will be securely and safely suspended.

(2) Follow Fig. 3-2 and Table 3-1 to make the holes in the ceiling.

(885)

Unit: in. (mm)

34-27/32

(885)

Table 3-1

Length

Type

12, 18, 24, 36

ABCD

31-1/32

(788)

28-15/32

(723)

34-27/32

Note: For DC Fan Tap Change Procedure for

4-Way Cassette, see page 16.

Hole-in-anchor Hole-in-plug

Concrete Inser t

Suspension bolt (M10 or 3/8") (field supply)

Fig. 3-1

(3) Determine the pitch of the suspension bolts using the supplied full-

scale installation diagram. The diagram and table (Fig. 3-3 and Table 3-2) show the relationship between the positions of the suspension ﬁ tting, unit, and panel.

Table 3-2

Type

12, 18, 24

Length

4-29/64

(113)

4-29/64

(113)

Suspension lug

ABCDE

6-13/16

(173)

6-13/16

(173)

Drain outlet(other side)

(VP25)

10-5/64

(256)

12-9/16

(319)

Unit: in. (mm)

8-17/64

(210)

8-17/64

(210)

3-15/32

(88)

3-15/32

(88)

Refrigerant tubing joint(liquid side) Refrigerant tubing joint(gas side)

A (suspension bolt pitch)

C (ceiling opening dimension)

Fig. 3-2

Power supply outlet

Inter-unit control wiring

1-3/8 (35)

Unit: in. (mm)

B (suspension bolt pitch)

D (ceiling opening dimension)

Fig. 3-3

3-3. Placing the Unit Inside the Ceiling

(1) When placing the unit inside the ceiling, determine the

pitch of the suspension bolts using the supplied fullscale installation diagram. (Fig. 3-4)

Tubing and wiring must be laid inside the ceiling when

suspending the unit. If the ceiling is already constructed, lay the tubing and wiring into position for connection to the unit before placing the unit inside the ceiling.

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Fig. 3-4

Unit: in. (mm)

Page 11

(2) The length of suspension bolts must be appropriate

CAUTION

Air bleeder prohibited

CAUTION

for a distance between the bottom of the bolt and the bottom of the unit of more than 19/32" as shown in Fig. 3-5.

(3) Thread the 3 hexagonal nuts and 2 washers (ﬁ eld

supply) onto each of the 4 suspension bolts as shown in Fig. 3-5. Use 1 nut and 1 washer for the upper side, and 2 nuts and 1 washer for the lower side, so that the unit will not fall off the suspension lugs.

(4) Adjust so that the distance between the unit and the

ceiling bottom is 15/32" to 43/64". Tighten the nuts on the upper side and lower side of the suspension lug.

(5) Remove the protective polyethylene used to protect

the fan parts during transport.

3-4. Installing the Drain Piping

(1) Prepare a standard hard PVC pipe (O.D. 1-1/4") for

the drain and use the supplied drain hose and hose band to prevent water leaks. The PVC pipe must be purchased separately. The unit’s transparent drain port allows you to check drainage. (Fig. 3-6)

Nuts and washers (use for upper and lower)

Double nut

Connection pipe

(drain port)

Bead

15/32 – 43/64 (12 – 17)

Hose band

Supplied drain hose

Packing (supplied)

Drain insulator (supplied)

Fig. 3-5

PVC adhesive

Fig. 3-6

Suspension bolt

Suspension lug

Unit: in. (mm)

Notch

Hard PVC pipe

VP-25

(Field supply)

●

Insert the drain pipe until it contacts the socket, as shown in Fig. 3-6, then secure it tightly with the hose band.

●

Do not use adhesive when connecting the supplied hose.

Reasons: 1. It may cause water to leak from the

connection. Since the connection is slippery just after the adhesive has been applied, the pipe easily slips off.

2. The pipe cannot be removed when maintenance is needed.

●

Do not bend the supplied drain hose 90° or more. The hose may slip off.

●

Align the hose bands with the end of the hose. Tighten the hose band ﬁ rmly. Please make sure that the bead is not covered by the hose band. (Fig. 3-6)

Tighten the hose clamps so their locking nuts face upward. (Fig. 3-6)

(2) After checking the drainage, wrap the supplied

packing and drain pipe insulator around the pipe. (Fig. 3-7)

Drain insulator (supplied)

Fig. 3-7

Fig. 3-8

●

Do not install an air bleeder as this may cause water to spray from the drain pipe outlet. (Fig. 3-8)

NOTE

Make sure the drain pipe has a downward gradient (1/100 or more) and that there are no water traps.

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Page 12

CAUTION

●

CAUTION

Upward gradient prohibited

In cases where it is necessary to raise the height of the drain piping, the drain piping can be raised to a maximum height of 33-15/32" above the bottom surface of the ceiling. Under no conditions attempt to raise it higher than 33-15/32" above the bottom surface of the ceiling. Doing so will result in water leakage. (Fig. 3-9)

●

Do not install the pipe with an upward gradient from the connection port. This will cause the drain water to ﬂ ow backward and leak when the unit is not operating. (Fig. 3-10)

●

Do not apply force to the piping on the unit side when connecting the drain pipe. The pipe should not be allowed to hang unsupported from its connection to the unit. Fasten the pipe to a wall, frame, or other support as close to the unit as possible. (Fig. 3-11)

●

Provide insulation for any pipes that are run indoors.

Refer to “■ SUPPLEMENT ON DRAIN PIPING”.

11-3/16" or less (as short as possible)

33-15/32" or less

0 – 45°

* Length of supplied drain hose = 9-27/32"

Fig. 3-9

Fig. 3-10

Support pieces

Fig. 3-11

3-5. Checking the Drainage

After wiring and drain piping are completed, use the following procedure to check that the water will drain smoothly. For this, prepare a bucket and wiping cloth to catch and wipe up spilled water.

(1) Connect power to the power terminal board (R, S

terminals) inside the electrical component box.

(2) Slowly pour approx. 0.3 gal of water into the drain pan

to check drainage. (Fig. 3-12)

(3) Short the check pin (CHK) on the indoor control board

and operate the drain pump. Check the water ﬂ ow through the transparent drain pipe and see if there is any leakage.

(4) When the check of drainage is complete, open the

check pin (CHK) and remount the tube cover.

Be careful since the fan will start when you short the pin on the indoor control board.

Drainage check

Over 3-15/16"

Drain pan outlet

Water (Approx. 0.3 gal)

Plastic container

for water intake

Fig. 3-12

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Page 13

3-6. How to Install the Ceiling Panel

CAUTION

Ceiling side

Main unit

Ceiling opening dimension

Corner cover

Ceiling panel

Strap

Push

Corner cover

Air-intake grille

Ceiling panel

Air-intake grille hinge

3-6-1. Before Installing the Ceiling Panel

Checking the unit position

(1) Check that the ceiling hole is within this range:

33-55/64 × 33-55/64 to 35-53/64 × 35-53/64 in.

(2) Use the full-scale installation diagram (from the

packaging) that was supplied with the unit to determine the positioning of the unit on the ceiling surface. If the positions of the ceiling surface and unit do not match, air leakage, water leakage, ﬂ ap operation failure, or other problems may occur.

●

Never place the panel face-down. Either hang it vertically or place it on top of a projecting object. Placing it face-down will damage the surface.

●

Do not touch the ﬂ ap or apply force to it. (This may cause ﬂ ap malfunction.)

must be within the range of 15/32" – 43/64" (Fig. 3-13)

If not within this range, malfunction or other trouble may occur.

Fig. 3-13

Flap

Fig. 3-14

Remove the air-intake grille and air ﬁ lter from the ceiling panel. (Figs. 3-15, 3-16 and 3-17)

a) Remove the 2 screws on the latch of the air-intake

grille. (Fig. 3-15)

b) Slide the air-intake grille catches in the direction

shown by the arrows 1 to open the grille. (Fig. 3-16)

c) With the air-intake grille opened, remove the grille

hinge from the ceiling panel by sliding it in the direction shown by the arrow 2. (Fig. 3-17)

Removing the corner cover

a) Slide the corner cover to the direction shown by

the arrow 1 to remove the corner cover. (Fig. 3-18).

Fig. 3-16

Latch

Fig. 3-15

Screw

Fig. 3-17

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Fig. 3-18

Page 14

3-6-2. Installing the Ceiling Panel

CAUTION

Square hole in unit

Temporary fastener

Push when you remove

Temporary fastener

Air leakage

Air leakage from ceiling surface

Staining

Condensation, water leakage

Adjust so that there are no gaps.

After completing the wiring process, install the supplied wiring cover before installing the panel. It is not possible to install the wiring cover after installing the panel. The power must be turned ON in order to change the ﬂ ap angle. (Do not attempt to move the ﬂ ap by hand. Doing so may damage the ﬂ ap.)

(1) Insert the temporary fasteners (stainless steel) on the

inside of the ceiling panel into the square holes on the unit to temporarily fasten the ceiling panel in place. (Fig. 3-20-1)

●

The ceiling panel must be installed in the correct direction relative to the unit. Align the REF. PIPE and DRAIN marks on the ceiling panel corner with the correct positions on the unit.

●

To remove the ceiling panel, support the ceiling panel while pressing the temporary fasteners toward the outside. (Fig. 3-20-1)

(2) Align the panel installation holes and the unit screw

holes.

(3) Tighten the supplied washer head screws at the 4

panel installation locations so that the panel is attached tightly to the unit. (Fig. 3-20-2)

(4) Check that the panel is attached tightly to the ceiling.

●

At this time, make sure that there are no gaps between the unit and the ceiling panel, or between the ceiling panel and the ceiling surface. (Fig. 3-21)

●

If there is a gap between the panel and the ceiling, leave the ceiling panel attached and make ﬁ ne adjustments to the installation height of the unit to eliminate the gap with the ceiling. (Fig. 3-21)

Screw (supplied) M4-8 or 5/32" – 5/16"

Fig. 3-19-1

Ceiling panel

Washer head screws

Main unit

Inter-unit control wiring

Wiring cover (supplied) Power supply outlet

Fig. 3-19-2

Fig. 3-20-1

Drain tubing corner

Refrigerant tubing corner

After completing the wiring process, install the supplied wiring cover before installing the panel. It is not possible to install the wiring cover after installing the panel.

DRAIN mark

REF. PIPE mark

Panel installation hole (4 locations)

Fig. 3-20-2

Insert a wrench or other tool into the corner cover

Do not allow

gaps

installation hole and make fine adjustments to the unit nut.

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●

If the screws are not sufﬁ ciently tightened, trouble such as that shown in the ﬁ gure below may occur. Be sure to tighten the screws securely.

Ceiling surface

Fig. 3-21

●

If a gap remains between the ceiling surface and the ceiling panel even after the screws are tightened, adjust the height of the unit again.

Fig. 3-23

Ceiling panel

Fig. 3-22

The height of the unit can be adjusted from the ceiling panel corner hole, with the ceiling panel attached, to an extent that does not affect the unit levelness, the drain hose, or other elements.

Page 15

3-6-3. Wiring the Ceiling Panel

Unit electrical component box

Unit drain hose side

Unit refrigerant tube side

Optional wireless receiver kit * Can only be installed in this position.

Can be installed rotated 90˚

Locations of the air-intake grille catches at the time the product is shipped. * The grille can be installed with these

catches facing in any of 4 directions.

(1) Open the cover of the electrical component box.

(2) Connect the 7P wiring connector (red) from the ceiling

panel to the connector in the unit electrical component box. (Fig. 3-24)

●

If the connectors are not connected, the Auto ﬂ ap will not operate. Be sure to connect them securely.

●

Check that the wiring connector is not caught between the electrical component box and the cover.

●

Check that the wiring connector is not caught between the unit and the ceiling panel.

3-6-4. How to Attach the Corner & Air-Intake Grille

Attaching the corner cover and air-intake grille

A. Attaching the corner cover

(1) Check that the safety cord from the corner cover is

fastened to the ceiling panel pin, as shown in the ﬁ gure. (Fig. 3-25)

(2) Use the supplied screws to attach the corner cover to

the ceiling panel. (Fig. 3-25)

B. Attaching the air-intake grille

●

To install the air-intake grille, follow the steps for Removing the grille in the reverse order. By rotating the air-intake grille, it is possible to attach the grille onto the ceiling panel from any of 4 directions. Coordinate the directions of the air-intake grilles when installing multiple units, and change the directions according to customer requests. (Fig. 3-26)

●

When attaching the air-intake grille, be careful that the ﬂ ap lead wire does not become caught.

●

Be sure to attach the safety cord that prevents the air-intake grille from dropping off to the ceiling panel unit as shown in the ﬁ gure at right.

●

With this ceiling panel, the directions of the air-intake grille lattices when installing multiple units, and the position of the label showing the company name on the corner panel, can be changed according to customer requests, as shown in the ﬁ gure below. However, the optional wireless receiver kit can only be installed at the refrigerant-tubing corner of the ceiling unit. (Fig. 3-27)

(Direction that the unit faces has been changed to facilitate explanation.)

Electrical component box cover

Ceiling panel

Screws (3 locations)

Ceiling panel side

Mains side

Clamp

* Pass the wiring connector through the clamp to fasten it in place, as shown in the figure.

wiring connector

Fig. 3-24

Place the corner cover so that the 3 tabs fit into the holes in the ceiling panel. Then fasten it in place with the supplied screws.

Fig. 3-25

Hole for ceiling panel hook

Hook that prevents the grille from dropping

Fig. 3-26

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Fig. 3-27

Page 16

3-6-5. Checking After Installation

●

Check that there are no gaps between the unit and the ceiling panel, or between the ceiling panel and the ceiling surface. Gaps may cause water leakage and condensation.

●

Check that the wiring is securely connected. If it is not securely connected, the auto ﬂ ap will not operate. (“P09” is displayed on the remote controller.) In addition, water leakage and condensation may occur.

3-6-6. When Removing the Ceiling Panel for Servicing

When removing the ceiling panel for servicing, remove the air-intake grille and air ﬁ lter, disconnect the wiring connector inside the electrical component box, and then remove the 4 mounting screws.

3-6-7. Adjusting the Auto Flap

The air-direction louver on the ceiling panel outlet can be adjusted as follows.

●

Adjust the louver to the desired angle using the remote controller. The louver also has an automatic air-sweeping mechanism.

NOTE

●

Never attempt to move the louver by hand.

●

Proper air ﬂ ow depends on the location of the air conditioner, the layout of the room and furniture, etc. If cooling or heating seems inadequate, try changing the direction of the air ﬂ ow.

3-7. Special Remarks

DC Fan Tap Change Procedure

Be sure to turn OFF the power (at mains) before beginning the work below. (1) In the table below, check the ﬁ eld-supply parts that will be used. (If this setting is not made, the airﬂ ow may

decrease and condensation may occur.)

Setting

(a)

(b) Air shield material (for use with 2-direction discharge)*

Setting (a): Go to (2). Setting (b): Go to (3).

(2) Setting (a)

Open the cover of the electrical component box. Short

Air shield material (for use with 3-direction discharge)* Air shield material (for use when a discharge duct is connected)*

* Use ﬁ eld-supply air shield material.

Indoor unit control PCB

* PCB model No.: CR-SXRP56B-B

the short-circuit pin TP3 (2P, yellow) on the indoor unit control PCB. (Fig. 3-28)

(3) Setting (b)

Open the cover of the electrical component box. Short the short-circuit pin TP6 (2P, white) on the indoor unit control PCB. (Fig. 3-28)

Fig. 3-28

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Page 17

4-Way Cassette 60 × 60 Type (Y1 Type) ■

3-8. Preparation for Suspending

This unit uses a drain pump. Use a level gauge to check that the unit is level.

3-9. Suspending the Indoor Unit

(1) Fix the suspension bolts securely in the ceiling using

the method shown in the diagrams, by attaching them to the ceiling support structure, or by any other method that ensures that the unit will be securely and safely suspended. (Fig. 3-29)

(2) Follow the diagram to make the holes in the ceiling.

(3) Determine the pitch of the suspension bolts using the

supplied full-scale installation diagram. The diagram shows the relationship between the positions of the suspension ﬁ tting, unit, and panel. (Fig. 3-30)

Hole-in-anchor Hole-in-plug

Suspension bolt (M10 or 3/8") (ﬁ eld supply)

Ceiling opening dimensions

21-1/32" Suspension bolt pitch

2-3/32"

Concrete Insert

23-5/8"

22-41/64"

6-11/16"6-19/64"

Fig. 3-29

23-5/8"

21-1/32"

Suspension bolt pitch

Ceiling opening dimensions

Drain tube connection port (outer dia ø1-1/32")

3-10. Placing the Unit Inside the Ceiling

(1) When placing the unit inside the ceiling, determine the

pitch of the suspension bolts using the supplied fullscale installation diagram. (Fig. 3-31)

Tubing and wiring must be laid inside the ceiling when

suspending the unit. If the ceiling is already constructed, lay the tubing and wiring into position for connection to the unit before placing the unit inside the ceiling.

(2) The length of suspension bolts must be appropriate

for a distance between the bottom of the bolt and the bottom of the unit of more than 19/32" as shown in the diagram. (Fig. 3-31)

(3) Thread the 3 hexagonal nuts and 2 washers (ﬁ eld

supply) onto each of the 4 suspension bolts as shown in the diagram. Use 1 nut and 1 washer for the upper side, and 2 nuts and 1 washer for the lower side, so that the unit will not fall off the suspension lugs. (Fig. 3-32)

(4) Adjust so that the distance between the unit and the

ceiling bottom is 33/64" to 45/64". Tighten the nuts on the upper side and lower side of the suspension lug. (Fig. 3-32)

(5) Remove the protective polyethylene used to protect

the fan parts during transport.

1-49/64"

4-39/64" 1-49/64"

Power supply port

Over 19/32"

Supplied bolt

Nuts and washers (used for upper and lower)

Double nut

8-15/32"

Refrigerant tubing joint (liquid side) ø1/4 (ﬂ ared)

Full-scale installation diagram (printed on top of container box)

Suspension bolt

Suspension lug

33/64" – 45/64"

11-9/641-3/16"

Fig. 3-30

33/64" – 45/64"

Fig. 3-31

Notch

Fig. 3-32

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Page 18

CAUTION

3-11. Installing the Drain Piping

CAUTION

(1) Prepare standard hard PVC pipe (O.D. 1-1/32") for the

drain and use the supplied hose band to prevent water leaks. (Fig. 3-33) The PVC pipe must be purchased separately. The transparent drain part on the unit allows you to check drainage.

(2) Installing the drain hose

●

To install the drain hose, ﬁ rst place 1 of the 2 hose bands over the unit drain port and the other hose band over the hard PVC pipe (not supplied). Then connect both ends of the supplied drain hose. (Fig. 3-33)

●

On the unit drain side, grasp the hose band with pliers and insert the drain hose all the way to the base.

●

If other commercially available hose bands are used, the drain hose may become pinched or wrinkled and there is danger of water leakage. Therefore be sure to use the supplied hose bands. When sliding the hose bands, be careful to avoid scratching the drain hose.

●

Do not use adhesive when connecting the supplied drain hose to the drain port (either on the main unit or the PVC pipe).

Reasons: 1. It may cause water to leak from the

connection. Since the connection is slippery just after the adhesive has been applied, the pipe easily slips off.

2. The pipe cannot be removed when maintenance is needed.

●

Wrap the hose with the supplied drain hose insulation and use the 4 twist ties so that the hose is insulated with no gaps.

●

Do not bend the supplied drain hose 90° or more. The hose may slip off.

NOTE

Make sure the drain pipe has a downward gradient (1/100 or more) and that there are no water traps.

Twist tie (4 ties, supplied)

Drain port

13/64"

63/64"

Unit

Drain hose insulation (supplied)

13/64"

63/64"

5-33/64"

●

Attach so that the hose band fastener is on the side of the drain port.

●

Attach the hose bands so that each is approximately 13/64" to 63/64" from the end of the supplied drain hose.

Air bleeder prohibited

●

Do not install an air bleeder as this may cause water to spray from the drain pipe outlet.

Hard PVC pipe (equivalent to O.D. 1-1/32") (Field supply)

Drain hose (supplied)

Hose band (2 bands, supplied)

Position to fasten hose bands

Fig. 3-33

●

In cases where it is necessary to raise the height of the drain piping, the drain piping can be raised to a maximum height of 2.78 ft. above the bottom surface of

1 ft. or less

2.78 ft. or less

the ceiling. Under no conditions attempt to raise it higher than 2.78 ft. above the bottom surface of the

* Length of supplied drain hose = 5-33/64"

Fig. 3-34

ceiling. Doing so will result in water leakage. (Fig. 3-34)

●

Do not use natural drainage.

●

Do not install the pipe with an upward gradient from the

Upward gradient prohibited

connection port. This will cause the drain water to ﬂ ow backward and leak when the unit is not operating.

Fig. 3-35

(Fig. 3-35)

●

Do not apply force to the piping on the unit side when connecting the drain pipe. The pipe should not be

Support bracket

allowed to hang unsupported from its connection to the unit. Fasten the pipe to a wall, frame, or other support as close to the unit as possible. (Fig. 3-36)

●

Provide insulation for any pipes that are run indoors.

Fig. 3-36

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Page 19

3-12. Checking the Drainage

CAUTION

After wiring and drain piping are completed, use the following procedure to check that the water will drain smoothly. For this, prepare a bucket and wiping cloth to catch and wipe up spilled water.

(1) Connect power to the power terminal board (R, S

terminals) inside the electrical component box.

(2) Slowly pour approx. 0.13 gal of water into the drain

pan to check drainage. (Fig. 3-37)

(3) Short the check pin (CHK) on the indoor control board

and operate the drain pump. Check the water ﬂ ow through the transparent drain pipe and see if there is any leakage.

(4) When the check of drainage is complete, open the

check pin (CHK) and remount the tube cover.

Be careful since the fan will start when you short the pin on the indoor control board.

Water drain

Over 3-15/16"

Plastic container for water intake

must be within the range of 33/64" to 45/64". (Fig. 3-38)

If not within this range, malfunction or other trouble may occur.

Water (Approx. 0.13 gal)

Drain pan outlet

Main unit

Fig. 3-37

3-13. How to Install the Ceiling Panel

Checking the unit position

(1) Check that the ceiling hole is within this range:

23-5/8" × 23-5/8"

(2) Conﬁ rm that the position of the indoor unit and the

ceiling as shown in the diagram. If the positions of the ceiling surface and unit do not match, air leakage, water leakage, ﬂ ap operation failure, or other problems may occur.

●

Never place the panel face-down. Either hang it vertically or place it on top of a projecting object. Placing it facedown will damage the surface.

●

Do not touch the ﬂ ap or apply force to it. (This may cause ﬂ ap malfunction.)

3-13-1. Before Installing the Ceiling Panel

(1) Remove the air-intake grille and air ﬁ lter from the

ceiling panel.

a) Slide the air-intake grille catches in the direction

shown by the arrows 1 to open the grille. (Fig. 3-40)

b) With the air-intake grille opened, remove the grille

hinge from the ceiling panel by sliding it in the direction shown by the arrow 2. (Fig. 3-41)

(2) Removing the corner cover

a) Remove the screws on the corner and slide the

latches in the direction of the arrow 1 to disconnect the hinges (3 locations). (Fig. 3-42) Then, remove the air-intake grille in the direction of the arrow 2. (Fig. 3-43)

Air-intake grille

Air-intake grille hinge

Corner cover

Ceiling side

Ceiling panel

Fig. 3-40

Fig. 3-42

Ceiling opening dimension

Screw

Push

Flap

Latch

Corner cover

Ceiling panel

Fig. 3-38

Fig. 3-39

Fig. 3-41

Fig. 3-43

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Page 20

CAUTION

3-13-2. Installing the Ceiling Panel

The power must be turned ON in order to change the ﬂ ap angle. (Do not attempt to move the ﬂ ap by hand. Doing so may damage the ﬂ ap.)

(1) Hang the temporary latches on the inside of the

ceiling panel to the receptacle on the unit to temporarily attach the ceiling panel in place. (Fig. 3-44)

●

The ceiling panel must be installed in the correct direction relative to the unit. Align the REF. PIPE and DRAIN marks on the ceiling panel corner with the correct positions on the unit.

(2) Align the panel installation holes and the unit screw

holes. (Fig. 3-45)

(3) Tighten the supplied washer head screws at the 4

panel installation locations so that the panel is attached tightly to the unit.

(4) Check that the panel is attached tightly to the ceiling.

(Fig. 3-46)

●

At this time, make sure that there are no gaps between the unit and the ceiling panel, or between the ceiling panel and the ceiling surface.

●

If there is a gap between the panel and the ceiling, leave the ceiling panel attached and make ﬁ ne adjustments to the installation height of the unit to eliminate the gap with the ceiling.

Temporary latch

Ceiling panel

Washer head screws

Ceiling surface

Temporary latches

Refrigerant tubing joint

REF. mark

Panel installation hole (4 locations)

Main unit

Ceiling panel

Fig. 3-44

Drainage check

DRAIN mark

Fig. 3-45

Do not allow gaps

Fig. 3-46

●

If the screws are not sufﬁ ciently tightened, trouble such as that shown in the ﬁ gure below may occur. Be sure to tighten the screws securely.

Air leakage

Air leakage from ceiling surface

Staining

Condensation, water leakage

●

If a gap remains between the ceiling surface and the ceiling panel even after the screws are tightened, adjust the height of the unit again.

Adjust so that there are no gaps.

3-13-3. Wiring the Ceiling Panel

(1) Open the cover of the electrical component box for

control PCB.

(2) Connect the 7P wiring connector (red) from the ceiling

panel to the connector on the control PCB in the unit electrical component box. (Fig. 3-48)

●

If the connectors are not connected, the Auto ﬂ ap will not operate. Be sure to connect them securely.

●

Check that the wiring connector is not caught between the electrical component box and the cover.

●

Check that the wiring connector is not caught between the unit and the ceiling panel.

Fig. 3-47

(Direction that the unit faces has been changed to facilitate explanation.)

Electrical component box cover

Screws (3 locations)

Fig. 3-48

Ceiling panel wiring connector

* Pass the wiring connector through the clamp to fasten it in place, as shown in the ﬁ gure.

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Page 21

3-13-4. How to Attach the Corner & Air-Intake Grille

Attaching the corner cover and air-intake grille

A. Attaching the corner cover

(1) Check that the safety cord from the corner cover is

fastened to the ceiling panel pin, as shown in the ﬁ gure. (Fig. 3-49)

(2) Use the supplied screws to attach the corner cover

to the ceiling panel.

B. Attaching the air-intake grille

●

To install the air-intake grille, follow the steps for the grille in the reverse order. By rotating the air-intake grille, it is possible to attach the grille onto the ceiling panel from any of 4 directions. Coordinate the directions of the air-intake grilles when installing multiple units, and change the directions according to customer requests. (Fig. 3-50)

●

When attaching the air-intake grille, be careful that the ﬂ ap lead wire does not become caught.

●

Be sure to attach the safety cord that prevents the air-intake grille from dropping off to the ceiling panel unit as shown in the ﬁ gure at right.

●

Locations of air-intake grille hinges

Refrigerant tube side

Optional wireless receiver kit

* Only this area is possible

for installation.

Electrical component box for power PCB

Removing

Place the corner cover so that the 3 tabs ﬁ t into the holes in the ceiling panel. Then fasten it in place with the supplied screws.

Hole for ceiling panel hook

Hook that prevents the grille from dropping

* The grille can be installed

with these hinges facing in any of 4 directions.

Drain pipe side

Fig. 3-49

Fig. 3-50

Can be installed rotated 90°

Fig. 3-51

Electrical component box for control PCB

3-13-5. Checking After Installation

●

Check that there are no gaps between the unit and the ceiling panel, or between the ceiling panel and the ceiling surface. Gaps may cause water leakage and condensation.

●

3-13-6. When Removing the Ceiling Panel for Servicing

3-13-7. Adjusting the Auto Flap

The air-direction louver on the ceiling panel outlet can be adjusted as follows.

●

Adjust the louver to the desired angle using the remote controller. The louver also has an automatic air-sweeping mechanism.

NOTE

●

Never attempt to move the louver by hand.

●

Proper air ﬂ ow depends on the location of the air conditioner, the layout of the room and furniture, etc. If cooling or heating seems inadequate, try changing the direction of the air ﬂ ow.

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Page 22

1-Way Cassette Type (D1 Type) ■

WARNING

CAUTION

3-47/64

19/32

28-47/64 (Ceiling opening dimension)

23-15/64 (Ceiling opening dimension)

29-59/64 (Panel outer dimensions)

24-13/32 (Outline dimension of panel)

25-63/64 (Suspension bolt pitch)

1-27/64

(1-27/64)

23-5/8

22-3/64

15-3/4 (Suspension bolt pitch)

3-14. Suspending the Indoor Unit

(1) Follow the diagrams to make the holes in the ceiling.

(Figs. 3-52 and 3-53)

(2) Depending on the ceiling type:

●

Insert suspension bolts as shown in Fig. 3-54 or

●

Use existing ceiling supports or construct a suitable support as shown in Fig. 3-55.

●

Make sure that the length of suspension bolts from the bottom of the unit is 19/32" or more. (Fig. 3-56)

Unit: in.

Fig. 3-52

It is important that you use extreme care in supporting the indoor unit from the ceiling. Ensure that the ceiling is strong enough to support the weight of the unit. Before hanging the unit, test the strength of each attached suspension bolt.

(3) Calculate the suspension bolt pitch using the full-scale

installation diagram (printed on the package). The relationship between the positions of the suspension lugs, unit, and ceiling panel is as shown in Fig. 3-53.

(4) Cut the ceiling material, if necessary.

(Figs. 3-52 and 3-53)

If the system requires fresh air to be drawn into the unit, cut and remove the insulation (both externally and internally) at the location shown as A in Figs. 3-57 and 3-58.

When making the cuts to the insulation, be careful not to damage the drain pan.

5-19/64 1-49/64

2-31/64

9-29/64

3-3/16

Flared refrigerant connection outlet (liquid tube)

Hole-in-anchor Hole-in-plug

Drain pipe connection (Be sure to connect the supplied flexible hose.)

22-3/64

10-1/32

Flared refrigerant connection outlet (gas tube)

1-19/64

2-9/16

1-49/64

12-19/64

Inter-unit Control Wiring

Power supply outlet

Fig. 3-53

Concrete

Suspension bolt

(M10 or 3/8")

Insert

1-3/16

Unit: in.

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Fig. 3-54

Ceiling tiles

Ceiling support

Fig. 3-55

Page 23

3-15. Placing the Unit Inside the Ceiling

CAUTION

Be sure to use a level gauge and conﬁ rm that the unit is level. If it is not level, water leakage may occur.

(1) Use the supplied M5 or 3/16" screws (4) to attach the

full-scale installation diagram to the indoor unit suspension lugs, in order to obtain the ceiling opening dimensions for suspending the unit. (Fig. 3-56)

Caution: Piping and wiring work must be performed

inside the ceiling after the unit is suspended. Therefore if the ceiling is already installed, the wiring and piping work should be completed up to the connection points prior to suspending the unit.

(2) Attach the special washers (supplied) and nuts (ﬁ eld

supply) to the suspension bolts (4 locations).

Suspension

lug

25/32 – 1 in.

For fresh air intake (ø3-15/16 hole)

Full-scale installation diagram

Fig. 3-56

Fig. 3-57

over 19/32 in.

3-5/32

6-11/16

Unit: in.

●

Use M10 or 3/8" nuts.

●

The length of the suspension bolts must be such that there is a space of at least 19/32" below the bottom of the suspension lugs, as shown in Fig. 3-56. If the length of the suspension bolts is too long, the bolts may interfere with the ceiling panel and louver motor, preventing their installation.

(3) Thread the 3 hexagonal nuts and 2 washers (ﬁ eld

supply) onto each of the 4 suspension bolts as shown in Fig. 3-59. Use 1 nut and 1 washer for the upper side, and 2 nuts and 1 washer for the lower side, so that the unit will not fall off the suspension lugs.

(4) Lift up the indoor unit and ﬁ t the suspension bolts into

the notches in the suspension lugs.

(5) Adjust so that the distance between the bottom of the

indoor unit suspension lugs and the bottom of the ceiling panel is 25/32-1". Then tighten the nuts above and below each suspension lug. The full-scale installation diagram can be used to help adjust the height of the indoor unit.

6-11/16

8-1/16

Nuts and washers (Used above and below.)

Double nuts

over 19/32"

For fresh air intake (ø3-15/16 hole)

Fig. 3-58

Suspension bolt

25/32-1"

Fig. 3-59

Unit: in.

Suspension lug

Notch

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Page 24

2-1/8

19/32

2-1/8

Suspension bolts

Tubing side

Drainage check section on drain port (transparent)

Supplied drain hose

(Field supply)

VP-25

Hard PVC pipe

PVC adhesive

Bead

Packing (supplied)

Drain insulator (supplied)

Align the hose band with end of the hose, and tighten so that it does not contact the bead.

CAUTION

●

CAUTION

The indoor unit includes a drain pump. Be sure to use a level gauge and verify that the unit is level.

●

Before inserting the ceiling material, complete as much of the drain piping work and refrigerant tubing work as possible.

(6) The distance between the unit and the opening of the

ceiling and the distance between the bottom surface of the ceiling and the bottom surface of the ﬂ ange of the unit should follow the dimensions given in Figs. 3-60 and 3-61.

Unit: in.

Fig. 3-60

3-16. Installing the Drain Piping

(1) Prepare standard hard PVC pipe (O.D. 1-1/4") for the

drain and use the supplied drain hose and hose band to prevent water leaks. The PVC pipe must be purchased separately. The unit’s transparent drain port allows you to check drainage. (Fig. 3-62)

●

Do not use adhesive at the drain connection port on the indoor unit.

●

Insert the drain pipe until it contacts the socket, as shown in the ﬁ gure at right, then secure it tightly with the hose band.

●

Tighten the hose clamps so their locking nuts face upward. (Fig. 3-62)

●

Do not use the supplied drain hose bent at a 90° angle. (The maximum permissible bend is 45°.)

●

Check the drainage at the unit drain port (transparent).

(2) After checking the drainage, wrap the supplied

packing and drain pipe insulator around the pipe, then secure it with the supplied clamps. (Fig. 3-63)

25/32

Fig. 3-61

Fig. 3-62

Drain insulator (supplied)

Ceiling material

25/32

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NOTE

Make sure the drain pipe has a downward gradient (1/100 or more) and that there are no water traps.

Fig. 3-63

Page 25

CAUTION

●

CAUTION

Support

bracket

water (approx. 0.2 gal)

Drainage check

Drain tube connection (transparent)

Discharge port

Do not install an air bleeder as this may cause water to spray from the drain pipe outlet. (Fig. 3-64)

●

Do not use natural drainage.

●

Do not install the pipe with an upward gradient from the connection port. This will cause the drain water to ﬂ ow backward and leak when the unit is not operating. (Fig. 3-66)

●

Provide insulation for any pipes that are run indoors.

Refer to “■ SUPPLEMENT ON DRAIN PIPING”.

Air bleed valve

Fig. 3-64

11-13/16" or less

33-15/32" or less

0 – 45°

* Length of supplied drain hose = 9-27/32"

Fig. 3-65

Upward gradient prohibited

Fig. 3-66

3-17. Checking the Drainage

After wiring and drain piping are completed, use the following procedure to check that the water will drain smoothly. For this, prepare a bucket and wiping cloth to catch and wipe up spilled water.

(1) Connect power to the power terminal board (R, S

terminals) inside the electrical component box.

(2) Slowly pour approx. 0.2 gal of water into the drain pan

using a siphon pump through the air outlet grille. (Fig. 3-68)

(3) Short the check pin (CHK) on the indoor control board

and operate the drain pump. Check the water ﬂ ow through the transparent drain pipe and see if there is any leakage.

Be careful since the fan will start when you short the pin on the indoor control board.

(4) When the drainage check is complete, open the check pin

(CHK) and remount the insulator.

The bottom drain port is for use only during test runs and servicing inspections. Do not connect the drain pipe to the bottom drain port.

Fig. 3-67

Fig. 3-68

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Page 26

3-18. Electrical Power Wiring

Refrigerant tubing joint (gas tube)

Refrigerant tubing joint (liquid tube)

Drain pipe connection (Be sure to connect the supplied flexible hose.)

Inter-unit Control Wiring

Power supply outlet

Flap

WARNING

(1) Wiring connections

The power inlet is on the side of the indoor unit where the refrigerant tubing is located. The electrical component box is on the lower air intake surface of the indoor unit. (Fig. 3-69)

(2) Wiring

Fig. 3-69

●

Route the power wiring into the indoor unit through the power inlet on the side of the unit. At this time, be sure that the wiring passes through the power inlet in the unit power section. If the wiring does not pass through this inlet, it may become pinched by the ceiling panel, and may result in ﬁ re.

●

Pass the wiring through the power inlet on the electrical component box and connect it to the terminal plate. Then fasten the wiring in place with the clamp.

3-19. How to Install the Ceiling Panel

Component Parts

Part name Quantity Appearance Part name Quantity Appearance

M5 × 40

or 5/16" × 9/16"

Ceiling panel 1

Washer-head screw

ø11/16

3-19-1. Before Installing the Ceiling Panel

Checking the position of the indoor unit

(1) Check that the dimensions of the ceiling opening are

the following:

28-47/64" × 23-15/64"

(2) Check that the positions of the ceiling surface and

indoor unit are as shown in Fig. 3-70. If the positions of the ceiling surface and indoor unit are not correct, problems such as air leakage, water leakage, and ﬂ ap operation trouble may occur.

●

Do not rest the panel facing downwards, lean up against a wall, or leave it sitting on top of a protruding object. Doing so may scratch the panel surface.

●

Do not apply excessive force to the ﬂ ap. (Fig. 3-71) (Doing so may damage the ﬂ ap.)

Screw 2

Be sure that this distance is within the range of 25/32 – 1 in. If it is not within this range, malfunction or other problems may result.

25/32 – 1 in.

Ceiling surface

4 × 12 or 5/32" × 15/32"

For fastening side

panel

Indoor unit

Ceiling opening dimension

Fig. 3-70

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Fig. 3-71

Page 27

Removing the intake grille

Hook

Screw

Hinge

Intake grille

Slide

Press on the tabs with a flathead (minus) screwdriver while pulling out the intake grille.

Screw

Slide the intake grille hooks (2 locations) in the direction of the arrow to open the intake grille. (Fig. 3-72) When the intake grille is open, press a ﬂ athead screwdriver against the rear tabs (2 locations) and pull out the intake grille. (Fig. 3-73)

Removing the side panel

Grasp the ﬁ nger grip on the side panel and slide the panel in the direction of arrow 1 to remove the panel. (Fig. 3-74) (There are 2 panels: 1 each on the left and right sides.)

Fig. 3-72

Fig. 3-73

Tab

Slide

Side panel

Fig. 3-74

3-19-2. Installing the ceiling panel

(1) Fasten the hooks on both sides of the ceiling panel

to the indoor unit. The hooks on one side (2 locations) are stationary, while the hook on the other side is moveable. (Fig. 3-75)

(2) Angle the panel somewhat and fasten the stationary

hook into the fastener on the side of the unit.

(3) After verifying that the hook is fastened, press the

other end up until the ceiling panel is level. Then press upwards until the moveable hook is fastened into the fastener on the unit.

(4) Verify that the hooks on both sides of the ceiling

panel are securely fastened to the unit. If the hooks are not securely fastened, the panel may fall. At this point, the panel is now provisionally fastened to the unit.

●

When removing the panel, press the movable hook toward the inside while supporting the panel. (Fig. 3-76)

Stationary hook

Hook receiver

Fig. 3-75

Press to remove.

Moveable hook

Fig. 3-76

Moveable hook

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Page 28

(5) Align the installation holes on the panel with the bolt

CAUTION

holes on the unit.

(6) Insert the supplied washer head bolts into the 4 panel

installation holes, and tighten until the panel is securely fastened against the unit. (Fig. 3-77)

(7) Verify that the panel is securely fastened against the

unit.

●

At this time, make sure that there is no gap between the indoor unit and the ceiling panel, or between the ceiling panel and the ceiling surface. (Fig. 3-78)

●

If there is a gap between the ceiling panel and the ceiling, leave the panel attached and adjust the installation height of the indoor unit upwards until the gap with the ceiling is eliminated. (Fig. 3-79)

●

If the adjustment is small enough that it will not affect the levelness of the indoor unit or the drain piping, then the unit height can be adjusted from the side panel installation holes, with the ceiling panel still attached.

Indoor unit

Ceiling panel

Washer-head screw

Fig. 3-77

Must be no gap.

Indoor unit

Ceiling surface

Ceiling panel

Fig. 3-78

●

If the screws are not fully tightened, problems such as those shown below may occur. Be sure to tighten the screws securely.

Air leakage

Ceiling panel air leakage

Stains

Condensation and water leakage

Insert a wrench or other standard tool into the side panel installation holes and make fine adjustments to the indoor unit nuts.

Fig. 3-79

●

If there is a gap between the ceiling surface and the ceiling panel even when the screws are fully tightened, readjust the height of the indoor unit. (Fig. 3-79)

Adjust so that there is no gap.

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Page 29

3-19-3. Wiring the ceiling panel

Screw

(1) Loosen the 2 screws on the electrical component box

lid, and remove the lid. (Fig. 3-80)

(2) Fasten the wiring connector (7P, red) which comes out

from the ceiling panel using the lead wire clamps (2 locations) on the unit. Then connect it to the connector (7P, red) inside the indoor unit electrical component box. (Fig. 3-81)

●

If the connector is not connected, “P09” is displayed on the remote controller, and the automatic ﬂ ap will not operate. Be sure to securely connect the connector.

●

Check that the wiring connector is not pinched between the electrical component box and the lid.

●

Check that the wiring connector is not pinched between the indoor unit and the ceiling panel.

3-19-4. Installing the side panel and intake grille

A. Installing the side panel

(1) Grasp the side panel ﬁ nger grip and slide the panel in

the direction of the arrow to install the side panel. (Fig. 3-82)

(2) Fasten the side panel onto the ceiling panel using the

supplied screws (4 × 12 or 5/32" × 15/32").

B. Installing the intake grille

●

To install the intake grille, follow the procedure for removing it in the reverse order. (Fig. 3-83)

●

When installing the intake grille, be careful that the ﬂ ap lead wire does not become pinched. (Fig. 3-83)

Screws

Electrical component box

Tabs

Electrical component box cover

Fig. 3-80

Inter-unit control wiring

Power supply outlet

Fig. 3-81

Fasten with screws

(4 s12 or 5/32" s15/32")

3-19-5. Others

A. Check after installation

●

Check again that there is no gap between the indoor unit and the ceiling panel, or between the ceiling panel and the ceiling surface. * If there is a gap, then water leakage and

condensation may occur.

●

Check that the wiring connections are secure. * If the wiring is not connected, the automatic ﬂ ap will

not operate. (“P09” is displayed on the remote controller.) In addition, water leakage, condensation, and other problems may occur.

B. If a wireless remote controller is used

●

For details concerning the installation procedure, refer to the installation manual which was supplied with the optional wireless remote controller and indoor unit internal receiver.

Tab

Slide

Slide the side panel so that the side panel tabs are fastened to the ceiling panel. Then fasten in place with the supplied screws

(4 s12 or 5/32" s15/32").

Fig. 3-82

Fig. 3-83

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Page 30

Low Silhouette Ducted Type (F1 Type) ■

3-20. Required Minimum Space for Installation and Service

●

This air conditioner is usually installed above the ceiling so that the indoor unit and ducts are not visible. Only the air intake and air outlet ports are visible from below.

●

The minimum space for installation and service is shown in Fig. 3-84 and Table 3-3.

●

It is recommended that space be provided (17-23/32" × 17-23/32") for checking and servicing the electrical system.

●

Fig. 3-85 and Table 3-4 show the detailed dimensions of the indoor unit.

Table 3-3

Type 7, 9, 12, 15 18, 24 36, 48, 54 A (Length) 30-23/32 (780) 42-17/32 (1,080) 61-13/32 (1,560) Number of duct ﬂ anges 234

Unit: in. (mm)

Table 3-4

Dimension

Type

7, 9, 12, 15 26-1/16

18, 24 37-7/8

36, 48, 54 56-25/32

ABCDEFGH I JK

23-5/8

(7-7/8 × 3)

35-7/16

(7-3/32 × 5)

54-11/32

(9-1/16 × 6)

27-9/16 30-23/32 11-13/32 10-5/16 26-25/32 28-5/32 7-3/32 – 13-3/8 8 12

39-3/8 42-17/32 11-13/32 10-23/32 38-19/32 39-31/32 5-1/8

58-9/32 61-13/32 13-3/16 12-7/32 57-15/32 58-27/32 5-1/8

A (Suspension bolt pitch)

Min. 9-27/32

22-27/32

Air outlet duct flange

Indoor unit

Fig. 3-84

9-21/32

(9-21/32 × 1)

19-9/32

(9-21/32 × 2)

Min.

Electrical

9-27/32

component box

Inspection access

17-23/32

Refrigerant tubing

Min. 25-19/32

Min.

15-3/4

Unit: in.

No. of holes

9-27/32 12 16

9-7/16 16 18

3-17/32

7-9/32

2-5/32 2-5/32

13/32

I J JK

13/32

3/4 3/4

4-ø15/32 (Hole)

18-ø1/8

Inspection access

1-9/16

(5-29/32)

2-15/16

2-9/16

13/32

7-7/8

10-1/4

(O.D.)

13/32

31/32

3-15/32

10-13/16

3-15/16

(Ceiling opening dimension)

1-7/32 1-7/32

22-27/32 31/32

(Suspension bolt pitch)

L-ø1/4

(Hole)

EE E F

A (O.D.)

H (Duct suspension bolt pitch) G (Ceiling opening dimension)

(Suspension bolt pitch)

Refrigerant tubing joint (liquid tube) Refrigerant tubing joint (gas tube) Upper drain port (O.D. 1-1/4 in.) Bottom drain port (O.D. 1-1/32 in.) Suspension lug Power supply outlet (2- ø 1-3/16 hole) Fresh air intake port ( ø 5-29/32 hole) Flange for the flexible air outlet duct ( ø 7-7/8 hole) Tube cover Electrical component box Flange for the air intake duct (Option or field supply)

Inter-unit control wiring

12-7/32

31/32 8-9/32

(Hole)

(17-23/32

17-23/32)

(Field supply)

4-17/32

13/32

24-13/16 31/32

1-3/16

6-5/16

2-3/4

31/32

2-3/4

3-11/32

Inspection access panel

5-1/8

11-7/32

Ceiling

31/32

6-7/8

1-3/8

7-15/32

Unit: in.

Fig. 3-85

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Page 31

3-21. Suspending the Indoor Unit

WARNING

Ceiling tiles

Ceiling suppor t

Air outlet duct

Air-outlet grille

Ceiling material Indoor unit

Bolt anchor

Suspension bolt

Air-intake duct

Air-intake grille

Depending on the ceiling type:

• Insert suspension bolts as shown in Fig. 3-86 or

• Use existing ceiling supports or construct a suitable support as shown in Fig. 3-87.

It is important that you use extreme care in supporting the indoor unit inside the ceiling. Ensure that the ceiling is strong enough to support the weight of the unit. Before hanging the unit, test the strength of each attached suspension bolt.

(1) When placing the unit inside the ceiling, determine the pitch of the

suspension bolts referring to the dimensional data on the previous page. (Fig. 3-84 and Table 3-3) Tubing must be laid and connected inside the ceiling when suspending the unit. If the ceiling is already constructed, lay the tubing into position for connection to the unit before placing the unit inside the ceiling.

(2) Screw in the suspension bolts allowing them to protrude from the

ceiling as shown in Fig. 3-86. (Cut the ceiling material, if necessary.)

(3) Thread the 3 hexagonal nuts and 2 washers (ﬁ eld supply) onto

each of the 4 suspension bolts as shown in Figs. 3-88 and 3-89. Use 1 nut and 1 washer for the upper part, and 2 nuts and 1 washer for the lower part, so that the unit will not fall off the suspension lugs.

Hole-in-anchor Hole-in-plug

Nuts and washers (use for upper and lower)

Double nuts

Concrete Inser t

Suspension bolt (M10 or 3/8") (field supply)

Fig. 3-86

Fig. 3-87

Suspension bolt

Suspension lug

Notch

●

Fig. 3-90 shows an example of installation.

Fig. 3-88

Suspension bolt

Hexagonal nut

Double nuts

Fig. 3-89

Fig. 3-90

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Page 32

3-22. Installing the Drain Piping

CAUTION

Drainage check section on drain port (transparent)

Supplied drain hose

(Field supply)

VP-25

Hard PVC pipe

PVC adhesive

Bead

Packing (supplied)

Drain insulator (supplied)

Align the hose band with end of the hose, and tighten so that it does not contact the bead.

(1) Prepare standard hard PVC pipe (O.D. 1-1/4") for the drain

and use the supplied hose band to prevent water leaks. The PVC pipe must be purchased separately. The transparent drain part on the unit allows you to check drainage. (Fig. 3-91)

●

Do not use adhesive at the drain connection port on the indoor unit.

●

Insert the drain pipe until it contacts the socket, as shown in the ﬁ gure at right, then secure it tightly with the hose band.

●

Do not use the supplied drain hose bent at a 90° angle. (The maximum permissible bend is 45°.)

●

Tighten the hose clamps so their locking nuts face upward. (Fig. 3-91)

(2) After connecting the drain piping securely, wrap the supplied

packing and drain pipe insulator around the pipe, then secure it with the supplied vinyl clamps. (Fig. 3-92)

NOTE

Make sure the drain pipe has a downward gradient (1/100 or more) and that there are no water traps.

●

Do not install an air bleeder as this may cause water to spray from the drain pipe outlet. (Fig. 3-93)

●

If it is necessary to increase the height of the drain pipe, the section directly after the connection port can be raised a maximum of 19-11/16”. Do not raise it any higher than 19-11/16”, as this could result in water leaks. (Fig. 3-94)

●

Do not install the pipe with an upward gradient from the connection port. This will cause the drain water to ﬂ ow backward and leak when the unit is not operating. (Fig. 3-95)

●

Refer to “■ SUPPLEMENT ON DRAIN PIPING”.

Prohibited

Good

Prohibited

Fig. 3-91

Drain insulator (supplied)

Vinyl clamps

Fig. 3-92

Air bleeder

Fig. 3-93

11-13/16" or less

19-11/16" or less

Fig. 3-94

Upward gradient prohibited

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3-23. Checking the Drainage

After wiring and drain piping are completed, use the following procedure to check that the water will drain smoothly. For this, prepare a bucket and wiping cloth to catch and wipe up spilled water.

(1) Connect power to the power terminal board (R, S terminals)

inside the electrical component box.

(2) Remove the tube cover and through the opening, slowly pour

approx. 0.3 gal of water into the drain pan to check drainage.

(3) Short the check pin (CHK) on the indoor control board and

operate the drain pump. Check the water ﬂ ow through the transparent drain port and see if there is any leakage.

Fig. 3-95

Support pieces

Fig. 3-96

Page 33

CAUTION

Be careful since the fan will start when you short

NOTE

the pin on the indoor control board.

(4) When the check of drainage is complete, open the check pin (CHK) and

remount the insulator and drain cap onto the drain inspection port.

3-24. Increasing the Fan Speed

If external static pressure is too great (due to long extension of ducts, for example), the air ﬂ ow volume may drop too low at each air outlet. This problem may be solved by increasing the fan speed using the following procedure:

(1) Remove 4 screws on the electrical component box

and remove the cover plate.

(2) Disconnect the fan motor sockets in the box.

(3) Take out the booster cable (sockets at both ends)

clamped in the box.

(4) Securely connect the booster cable sockets between

the disconnected fan motor sockets in step 2 as shown in Fig. 3-98.

(5) Place the cable neatly in the box and reinstall the

cover plate.

Electrical component box

Fan

motor

Booster cable

Fan motor socket

(At shipment) (Booster cable installed)

Fig. 3-98

How to read the diagram

The vertical axis is the external static pressure (in. WG) while the horizontal axis represents the air ﬂ ow (CFM). The characteristic curves for “HT,” “H,” “M” and “L” fan speed control are shown. The nameplate values are shown based on the “H” air ﬂ ow. For the 18 and 24 types, the air ﬂ ow is 635 CFM, while the external static pressure is 0.20 in. WG at “H” position. If external static pressure is too great (due to long extension of ducts, for example), the air

S-36MF1U6

0.60

Limit line

(in.WG)

0.40

Limit line

S-07MF1U6 S-09MF1U6 S-12MF1U6

0.60

(in.WG)

0.40

Limit line

0.20

External Static Pressure

247 306

177

Air Flow (CFM)

353

0.60

0.40

Limit line

(in.WG)

Limit line

ﬂ ow volume may drop too low at each air outlet. This problem may be solved by increasing the fan speed as explained above.

0.20

External Static Pressure

0.20

External Static Pressure

S-15MF1U6

0.60

(in.WG)

0.40

Limit line

0.20

External Static Pressure

318 428

Air Flow (CFM)

S-48MF1U6

371

353

Power supply outlet

Inter-unit control wiring

Fig. 3-97

S-18MF1U6 S-24MF1U6

0.60

(in.WG)

Limit line

0.40

Limit line

494 565

706

0.20

External Static Pressure

530

0.60

0.40

0.20

External Static Pressure

Air Flow Volume (CFM)

S-54MF1U6

Limit line

(in.WG)

Limit line

353

742 918

706

Air Flow Volume (CFM)

1059

706

Air Flow Volume (CFM) Air Flow Volume (CFM)

1059883

1413

706

1059883

1413

HT : Using the booster cable H : At shipment

Fig. 3-99

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Page 34

3-25. When Installing the Indoor Unit

Conﬁ rm that the indoor unit should be installed in a horizontal position. Use the level gauge or vinyl tube and check every four corner of the unit is in horizontal. If the air outlet duct ﬂ ange is positioned with downward gradient, there is in danger of water splash or drainage. Also, dust may sometimes be contaminated inside the drain pan caused by the residual drain water. Install the air outlet duct ﬂ ange side in horizontal or upward and within the range of 3/8" in the upward direction. Never install it with a downward gradient against horizontal.

Level gauge

Air outlet duct flange

(Prohibited)

Fig. 3-100

Make sure to confirm that the unit is in horizontal at the position of the ceiling-mount hanger by using a level gauge or vinyl tubing.

3-26. Required Minimum Space for Installation and Service

If the ceiling tiles cannot be removed, provide the opening holes on the lower side of the indoor unit for removing the unit in order to maintain and clean the drain pan and heat exchanger or provide a minimum of 1.0 ft. or more space.

Fig. 3-101

Min. 1.0 ft. or more space

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Page 35

Slim Low Static Ducted Type (M1 Type) ■

3-27. Required Minimum Space for Installation and

Service

●

This air conditioner is usually installed above the ceiling so that the indoor unit and ducts are not visible. Only the air intake and air outlet ports are visible from below.

●

The minimum space for installation and service is shown in the diagram.

●

*H dimension means the minimum height of the unit.

●

Select the *H dimension such that a downward slope of at least 1/100 is ensured as indicated in “3-32. Installing the Drain Piping”.

●

The diagram shows the detailed dimensions of the indoor unit.

32-7/16" (Suspension bolt pitch)

min. 7-7/8"

22-13/64"

Flange for air outlet duct

* Min. 4" or more for bottom air intake

min.

7-7/8

MIN.25/32"

*MIN.25/32"

Fig. 3-102

Electrical component box

Inspection

access

17-23/32"

Refrigerant tubing

min.25-5/8"

Unit: in.

7-7/8"

*H=MIN.9-1/2"

Ceiling

5-45/64

25-13/64

(Suspension bolt pitch)

7-41/64

22-13/64

1-1/2

4-61/64

25-13/64(6-19/64x4)

(Suspension bolt pitch)

32-7/16

27-1/4

5-ø1/8

29-17/32

26-49/64

(Hole)

1-9/64 3-51/64

2-19/32

1-1/32

1-1/16

(17-23/32

1-29/64

5-29/32

Fig. 3-103

Inspection access

" 17-23/32")

(Field supply)

55/64

1-37/64

35/64

4-23/32

5-13/64

19/32

29/32

29/32 6-7/64

* Frame Filter Uninstalled

Water inlet

10-ø1/8

8-21/32

27-23/32

1-7/64 1-3/16

3-3/16

1-19/64

6-1/32

(Hole)

8-21/32

3-5/16

5-29/32

7-7/8

5-13/64

2-ø1/8

35/64

29/32

25/64

1-3/16

3-5/32 5-5/8

(Hole)

9-3/8

1-47/64

Unit: in.

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Page 36

3-28. Preparations Before Installation

(1) Conﬁ rm the positional relationship between the unit and suspension

bolts. (Refer to the diagram.)

• Install the inspection opening on the control box side where maintenance and inspection of the control box are easy.

The drain pump can only be inspected through the bottom of the unit.

Install the inspection opening also in the lower part of the unit.

(Inspection access)

2.3

Arrow view A

Inspection access

(Field supply)

2.7

Air discharge

Air intake

Ceiling

Fig. 3-104

Unit: ft.

(2) Make sure the range of the unit’s external static pressure is not exceeded. (See the technical documentation for the range of the external static pressure setting.)

(3) Open the installation hole. (Pre-set ceilings)

• Once the installation hole is opened in the ceiling where the unit is to be installed, pass refrigerant piping, drain piping, transmission wiring, and remote control wiring (It is not necessary if using a wireless remote controller) to the unit’s piping and wiring holes.

See “5. HOW TO PROCESS TUBING, 3-32. Installing the Drain Piping” and “4. ELECTRICAL WIRING”.

• After opening the ceiling hole, make sure ceiling is level if needed. It might be necessary to reinforce the ceiling frame to prevent shaking. Consult an architect or carpenter for details.

3-29. For Bottom Intake

For bottom intake, replace the chamber lid and protection net in the procedure shown in the diagram.

(1) Remove the Frame Filter Assy. Remove the chamber lid.

(2) Refer to the diagram to attach the chamber lid and Frame Filter Assy in the direction of the arrow. Note: Attach the lid with the dummy holes downward.

(3) Attach the Frame Filter Assy (supplied) in the manner shown in the diagram.

(1)

Air intake

(3)

Main unit

Air discharge

(2)

Chamber lid

Air discharge

Dummy hole

Air intake

Dummy hole

Frame Filter Assy

Chamber lid

Frame Filter Assy

Attach the Frame Filter Assy to the main unit while pushing the tip of the latches in the direction of the arrow.

Frame Filter Assy

In case of bottom side In case of back side

Fig. 3-105

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Page 37

3-30. Installing the Duct

CAUTION

Connect the duct supplied in the ﬁ eld.

Air inlet side

●

Attach the duct and intake-side ﬂ ange (ﬁ eld supply).

●

Connect the ﬂ ange to the main unit with 10 -

●

Wrap the intake-side ﬂ ange and duct connection area with aluminum tape or something similar to prevent air

1/8" (Hole) screws.

escaping.

When attaching a duct to the intake-side, be sure to attach an air ﬁ lter inside the air passage on the intake-side. (Use an air ﬁ lter whose dust collecting efﬁ ciency is at least 50% in a gravimetric technique.) The included ﬁ lter is not used when the intake duct is attached.

Air outlet side

●

Connect the duct according to the air outside of the outlet-side ﬂ ange.

●

Wrap the outlet-side ﬂ ange and the duct connection area with aluminum tape or something similar to prevent air escaping.

●

Be sure to insulate the duct to prevent condensation from forming. (Material: glass wool or polyethylene foam, 1 in. thick)

●

Use electric insulation between the duct and the wall when using metal ducts to pass metal laths of the net or fence shape or metal plating into wooden buildings.

●

Be sure to explain about the way of maintaining and cleaning local procurements (air ﬁ lter, grille [both air outlet and suction grille], etc.) to your customer.

Flange

(Field supply)

Connection screw (×10)

Rectangular solid duct (Field supply)

Main unit

Air inlet side

Flange

Insulation material (Field supply)

Air outlet side

Fig. 3-106

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Page 38

3-31. Suspending the Indoor Unit

WARNING

CAUTION

Depending on the ceiling type:

• Insert suspension bolts as shown in the diagram

• Use existing ceiling supports or construct a suitable support as shown in the diagram.

(1) When placing the unit inside the ceiling, determine the

pitch of the suspension bolts referring to the dimensional data on the previous page. Tubing must be laid and connected inside the ceiling when suspending the unit. If the ceiling is already constructed, lay the tubing into position for connection to the unit before placing the unit inside the ceiling.

(2) Screw in the suspension bolts allowing them to

protrude from the ceiling as shown in the diagram. (Cut the ceiling material, if necessary.)

(3) Thread the 3 hexagonal nuts and 2 washers (ﬁ eld

supply) onto each of the 4 suspension bolts as shown in the diagram. Use 1 nut and 1 washer for the upper part, and 2 nuts and 1 washer for the lower part, so that the unit will not fall off the suspension lugs.

Suspension bolt

Hole-in-anchor Hole-in-plug

Suspension bolt (M10 or 3/8")

Nuts and washers (use for upper and lower)

Concrete Insert

Fig. 3-107

Ceiling tiles

Ceiling support

Fig. 3-108

Suspension bolt

Suspension lug

Hexagonal nut

Double nuts

Fig. 3-109

(4) Adjust the height of the unit.

(5) Check the unit is horizontally level.

●

Make sure the unit is installed level using a level or a plastic tube ﬁ lled with water. In using a plastic tube instead of a level, adjust the top surface of the unit to the surface of the water at both ends of the plastic tube and adjust the unit horizontally. (One thing to watch out for in particular is if the unit is installed so that the slope is not in the direction of the drain piping, this might cause leaking.)

(6) Tighten the upper nut.

Double nuts

Notch

Fig. 3-110

Level gauge

Vinyl tube

Fig. 3-111

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Page 39

3-32. Installing the Drain Piping

CAUTION

(1) Prepare standard hard PVC pipe (O.D. 1-1/32") for the

drain and use the supplied hose band to prevent water leaks. The PVC pipe must be purchased separately. The transparent drain part on the unit allows you to check drainage.

●

Do not use adhesive at the drain connection port on the indoor unit.

●

Insert the drain pipe until it contacts the socket, as shown in the ﬁ gure at right, then secure it tightly with the hose band.

●

Do not use the supplied drain hose bent at a 90° angle. (The maximum permissible bend is 45°.)

●

Tighten the hose clamps so their locking nuts face in the horizontal direction.

●

Make sure that the drain port is not a downward gradient from the joint section (may lead to abnormal noise).

NOTE

Make sure the drain pipe has a downward gradient (1/100 or more) and that there are no water traps.

●

Do not install an air bleeder as this may cause water to spray from the drain pipe outlet.

●

If it is necessary to increase the height of the drain pipe, the section directly after the connection port can be raised a maximum of 19-11/16". Do not raise it any higher than 19-11/16", as this could result in water leaks.

●

Do not install the pipe with an upward gradient from the connection port. This will cause the drain water to ﬂ ow backward and leak when the unit is not operating.

●

3-33. Checking the Drainage

After wiring and drain piping are completed, use the following procedure to check that the water will drain smoothly. For this, prepare a bucket and wiping cloth to catch and wipe up spilled water.

(1) Connect power to the power terminal board (R, S

terminals) inside the electrical component box.

(2) Remove the eyelet cap and through the opening,

slowly pour about 0.13 gal of water into the drain pan to check drainage.

(3) Short the check pin (CHK) on the indoor control board

and operate the drain pump. Check the water ﬂ ow through the transparent drain port and see if there is any leakage.

Twist tie (4 ties, supplied)

Drain port

13/64

Unit

at least 1/100

Drain hose insulation (supplied)

13/64

1 1

5-33/64

Fig. 3-112

Air bleeder

Prohibited

Fig. 3-113

Good

Fig. 3-114

Prohibited

Fig. 3-115

Fig. 3-116

Unit: in.

Hard PVC pipe (equivalent to O.D. 1-1/32") (Field supply)

Drain hose (supplied)

Hose band (2 bands, supplied)

●

Attach so that the hose band

Position to fasten hose bands

fastener is on the side of the drain port.

●

Attach the hose bands so that each is approximately 1/4" to 1" from the end of the supplied drain hose.

11-13/16" or less (not a downward gradient)

19-11/16" or less

Upward gradient

Support pieces

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Page 40

CAUTION

Be careful since the fan will start when you short the pin on the indoor control board.

(4) When the check of drainage is complete, open the check pin (CHK)

Water inlet

and remount the insulator and drain cap onto the drain inspection port.

Eyelet cap

3-34. Increasing the Fan Speed

For Short Circuit Connection ■

●

The standard (before shipment) external static pressure is shown in the table below.

●

When using with a higher static pressure, it is necessary to change to the high static pressure mode.

External static pressure

Type 7 9 12 15 18 Standard (in.WG) 0.04 0.06 0.06 0.06 0.06 High static pressure (in.WG) 0.12 0.12 0.16 0.16 0.16

When using with high static pressure mode, set the indoor unit control board as shown at right. Follow the below procedure while the unit is turned off. (1) Open the cover of the electrical box and conﬁ rm that it is the indoor unit

control board.

(2) Connect the short circuit connector to the short circuit pin TP3 (2P:

Indoor control board

Yellow) of the indoor unit control board.

●

In case of wired remote controller setting, do not use the short circuit connector.

For Wired Remote Controller ■

Press and hold the , and buttons simultaneously for 4 seconds or

longer.

“ ,” unit No. “ ” (or “ ” in the case of group control), item code “ ,”

and settings data “ ” are displayed blinking on the remote controller’s LCD display. At this time, the indoor unit fan (or all indoor unit fans in the case of group

control) begins operating.

Press the temperature setting / buttons to select the item code

“ ”.

Press the timer time / buttons to select the desired setting data.

* For item codes and setting data, refer to the right table.

Press the button.

(The display stops blinking and remains lit, and setting is completed.)

Item code

5 1

No. Description

0000 Standard (setting at shipment)

0003 High static-pressure

Press the button to return to normal remote controller’s display.

Fig. 3-117

White Yellow Red

TP6 TP3 TP1

TP6

TP3

TP1

Wiring port

0.16

0.12

0.08

0.04

177 353

External Static Pressure (in.WG)External Static Pressure (in.WG)

0.20

0.16

0.12

0.08

0.04

177 353

0.197

0.16

(in.Aq)

0.12

0.08

0.04

External Static PressureExternal Static Pressure (in.WG)(in.WG)

Airflow (CFM) Airflow (CFM)

S-12MM1U6

Airflow (CFM) Airflow (CFM)

0.197

(in.Aq)

S-09MM1U6S-07MM1U6

177 353

0.24

0.20

0.16

0.12

0.08

0.04

S-15MM1U6

177 353

0.197

(in.Aq)

0.197

(in.Aq)

External static pressure’s upper limit in high static pressure mode

Standard external static pressure's upper limit

Lower limit airflow

S-18MM1U6

0.24

0.20

0.16

0.12

0.08

0.04

External Static Pressure (in.WG)

353 530

Airflow (CFM)

External Static

Pressure

(in.WG)

0.197

(in.Aq)

Airflow (CFM)

Rated external static pressure in high static pressure mode

Lower static pressure in high static pressure mode

Rated external static pressure at shipment

Upper limit airflow

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Page 41

High Static Pressure Ducted Type (E1 Type) ■

3-35. Required Minimum Space for Installation and

Service

●

This air conditioner is usually installed above the ceiling so that the indoor unit and ducts are not visible. Only the air intake and air outlet ports are visible from below.

●

The minimum space for installation and service is shown in Fig. 3-118.

It is recommended that space be provided (23-5/8" ●× 23-5/8") for checking and servicing the electrical system.

●

Fig. 3-119 and Table 3-5 show the detailed dimensions of the indoor unit.

38-37/64

Suspension

bolt pitch

Inspection access (23-5/8" × 23-5/8")

Drain pan

Ceiling face

5-1/8

19-11/16

11-27/64

Suspension bolt pitch

Electrical

component

(Space for service)

Min. 23-5/8

box

Space for

Min. 5-1/8

Min. 23-5/8

Air suction side

Refrigerant tubing

service

Min. 22-53/64

Unit: in.

Table 3-5

Length

Type

Unit: in.

ABC

16-17/32 15-35/64 2-43/64

17-23/32 16-47/64 3-55/64

24-13/32

19-11/16 2-3/4

25/64 25/64

2-5/32 2-5/32

5-1/8

3-5/32 11-27/64

16 - ø1/8 (Hole for full circumference)

19/32

1-3/8 1-3/8

1-31/32

2-5/32

31-7/32

7 s3-15/16 = 27-9/16

22 - ø1/8 (Hole for full circumference)

1-57/64

(Suspension bolt pitch)

1-13/16

19-11/16

38-37/64

(Suspension bolt pitch)

39-49/64

2-5/32

1-37/64

4 s3-15/16 = 15-3/4

25/32

3-35/64

2-23/64

Electrical component box

4-ø20 hole for suspension bolt

Refrigerant liquid line (ø3/8 or ø1/4) Refrigerant gas line (ø3/4 or ø5/8) Power supply outlet

19/32

Drain connection (25A, O.D. 1-1/4") Duct connection for suction Duct connection for discharge Inter-unit control wiring

3-15/16

Fig. 3-118

3-15/16

3-55/64

1-11/32

12-13/64

3-15/16

11-13/16

3-15/16

Drain pan

Unit: in.

Fig. 3-119

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Page 42

3-36. Suspending the Indoor Unit

WARNING

Air-outlet grille

Air-intake grille

Depending on the ceiling type:

●

Insert suspension bolts as shown in Fig. 3-120 or

●

Use existing ceiling supports or construct a suitable support as shown in Fig. 3-121.

(1) When placing the unit inside the ceiling, determine the pitch of

the suspension bolts referring to the dimensional data given previously. (Figs. 3-118 and 3-119)

Tubing must be laid and connected inside the ceiling when

suspending the unit. If the ceiling is already constructed, lay the tubing into position for connection to the unit before placing the unit inside the ceiling.

(2) Screw in the suspension bolts allowing them to protrude from the

ceiling as shown in Fig. 3-120. (Cut the ceiling material, if necessary.)

(3) Suspend and ﬁ x the indoor unit using the 2 hexagonal nuts (ﬁ eld

supply) and special washers (supplied with the unit) as shown in Fig. 3-122.

Hole-in-anchor Hole-in-plug

Concrete Insert

Suspension bolt (M10 or 3/8") (field supply)

Fig. 3-120

Ceiling tiles

Ceiling suppor t

Fig. 3-121

Hexagonal nuts

Suspension bolt

and washers (2 sets)

25/32" – 1-31/32"

Fig. 3-122

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Page 43

Sealing tape

Drain joint (supplied)

Drain pan

Drain opening (25A or 1-11/32

" male screw)

Good

Min. 1/100

Downward gradient

Not good

3-37. Installing the Drain Piping

(1) Prepare standard hard PVC pipe (O.D. 1-1/4") for the

drain and use the supplied drain socket to prevent water leaks. The PVC pipe must be purchased separately. When doing this, apply adhesive for the PVC pipe at the connection point.

(2) If connecting a drain joint (supplied) to the threaded

drain port, ﬁ rst wrap the drain port threads with sealing tape, then connect the joint. (Fig. 3-123)

(3) After connecting the drain pipe securely, wrap insulator

(ﬁ eld supply) around the pipe.

(4) Ensure the drain pipe has a downward gradient (1/100

or more) and prepare traps as indicated in Fig. 3-124.

(5) Also, in another part of the pipe arrangement, prepare

traps with an inspection plug to clean dust or debris that may cause leaking of water. (Fig. 3-125)

(6) After connecting the drain piping, slowly pour water into

the drain pan to check that the water drains smoothly.

3-38. Caution for Ducting Work

●

This unit has high static pressure (applicable external static pressure Max. 0.68 – 0.88 in. WG. In the case of small pressure resistance (for instance, a short duct), install a damper for adjusting air ﬂ ow volume as air ﬂ ow volume / air ﬂ ow noise increases.

●

If the air conditioner is to be installed in a room such as an ofﬁ ce or meeting room which needs a low sound level, provide a supply and return noise absorption chamber with an acoustic liner.

●

Include an air ﬁ lter (ﬁ eld supply) at the return duct.

Fig. 3-123

Fig. 3-124

Min.

3-15/16 in.

Min. 1-31/32 in.

3-39. Indoor Fan Performance

How to Read the Diagram

The vertical axis is the External Static Pressure (in. WG) while the horizontal axis represents the Air Flow (CFM). The characteristic curve for the “H,” “Med,” and “Lo” fan speed control. The nameplate values are shown based on the “H” air ﬂ ow. Therefore in the case of 36 Type, the ﬂ ow is 1059 CFM, while the External Static Pressure is 0.72 in. WG at “H” position. If the external static pressure is too great (due to long extension of duct, for example), the air ﬂ ow volume may drop too low at each air outlet. (Fig. 3-126)

(in. WG)

1.00

0.80

Limit line

0.60

0.40

External Static Pressure

0.20

36 Type 48 Type

883 1059 1236

Air Flow (CFM) Air Flow (CFM)

NOTE

Limit line

H: At shipment

Fig. 3-126

Inspection plug

Fig. 3-125

(in. WG)

1.00

0.80

0.60

0.40

External Static Pressure

0.20

Limit line

1059 1236 1412

H,M

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Page 44

Ceiling Type (T1 Type) ■

3-40. Required Minimum Space for Installation and Service

(1) Dimensions of suspension bolt pitch and unit

Table 3-6

Dimension

Type

12, 18 33-21/32 35-53/64 8-17/64

24 44-19/64 46-29/64 8-17/64

ABC

Unit: in.

(2) Refrigerant tubing • drain hose position

Left side

9-7/8

Closed with rubber stopper at time of shipment.

Rear (figure shows view from front)

1-1/4

6-47/64

1-17/32

3-5/16

Left drain position

2-23/64

6-11/16

12-19/32

(Suspension bolt pitch)

1-1/4

Liquid tubing

Gas tubing

Right drain position

Fig. 3-128

(Suspension bolt pitch)

2-21/64 2-61/64

Ceiling side

3-61/64 3-13/16

9/64

5-3/4

Fig. 3-127

2-3/64

4-9/64

6-47/64

1-17/32

26-49/64

1-5/64 1-5/64

Right side

Air outlet

8-1/2

(Liquid tubing • Gas tubing)

6-11/32

9-7/8

Air intake

Unit: in.

(3) Unit opening position (Refrigerant tubing • drain hose • power inlet port • remote control wiring inlet port)

Rear outlet port

3-35/64

10-5/16 4-59/64 2-53/64

3-11/64

4-11/64

13-21/32

Unit: in.

Right-side drain hose outlet port

Side panel

Position of plate inside side panel

Left-side drain hose outlet port

Side panel

Inter-unit control wiring (ø1-3/16", knock-out, use rubber grommet)

Outside air intake duct connection port (ø3-15/16", knock-out)

6-47/64

Power supply outlet (ø1-3/16", knock-out)

Rear tubing hole

3-5/16

Left-side drain hose outlet port

*1 Use a compass saw, jig saw or similar tool and cut along the indented portion of the side panel.

Fig. 3-129

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Page 45

WARNING

Ceiling tiles

Ceiling suppor t

(4) Wall and ceiling side opening position

Figure shows view from front

5-45/64

3-35/64

ø3-15/16 wall side opening

ø3-15/16 wall side opening (for left-side drain hose)

5-5/16

* If the optional drain up kit is installed, create a ø3-15/16" hole along the dotted line (part marked with * in ﬁ gure).

Fig. 3-130

3-41. Suspending the Indoor Unit

(1) Place the full-scale diagram (supplied) on the ceiling

at the spot where you want to install the indoor unit. Use a pencil to mark the drill holes. (Fig. 3-131).

NOTE

Since the diagram is made of paper, it may shrink or stretch slightly because of high temperature or humidity. For this reason, before drilling the holes maintain the correct dimensions between the markings.

(2) Drill holes at the 4 points indicated on the full-scale

diagram.

(3) Depending on the ceiling type:

a) Insert suspension bolts as shown in Fig. 3-132.

b) Use existing ceiling supports or construct a suitable

support as shown in Fig. 3-133.

Ceiling

ø3-15/16 ceiling opening

Figure shows view from top

Wall

Full-scale installation diagram

Hole-in-anchor Hole-in-plug

3-35/64 *

6-7/64

4-59/64

Ceiling

Fig. 3-131

Concrete Inser t

Suspension bolt (M10 or 3/8") (field supply)

Fig. 3-132

Wall

It is important that you use extreme care in supporting the indoor unit from the ceiling. Ensure that the ceiling is strong enough to support the weight of the unit. Before hanging the ceiling unit, test the strength of each attached suspension bolt.

(4) Screw in the suspension bolts, allowing them to

protrude from the ceiling as shown in Figs. 3-132 and 3-133. The distance of each exposed bolt must be of equal length within 1-15/16". (Fig. 3-134)

unit

Ceiling surface

Fixture

Fig. 3-134

Within

1-15/16"

Pull out the air-intake grille pushing claws of the hinges

Screw

Latch

Fig. 3-133

Hinge

Slide

Air-intake grille

Fig. 3-135

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Page 46

(5) Before suspending the indoor unit, remove the 2 or 3 screws on the

Indoor side

Outdoor side

latch of the air-intake grilles, open the grilles, and remove them by pushing the claws of the hinges as shown in Fig. 3-135. Then remove both side panels sliding them along the unit toward the front after removing the 2 attachment screws. (Fig. 3-136)

(6) Carry out the preparation for suspending the indoor unit. The

suspension method varies depending on whether there is a suspended ceiling or not. (Figs. 3-137 and 3-138)

(7) Suspend the indoor unit as follows:

a) Mount 1 washer and 2 hexagonal nuts on each suspension bolt as

shown in Fig. 3-139.

b) Lift the indoor unit, and place it on the washers through the notches,

in order to ﬁ x it in place. (Fig. 3-140)

c) Tighten the 2 hexagonal nuts on each suspension bolt to suspend the

indoor unit as shown in Fig. 3-141.

NOTE

The ceiling surface is not always level. Please conﬁ rm that the indoor unit is evenly suspended. For the installation to be correct, leave a clearance of about 3/8" between the ceiling panel and the ceiling surface and ﬁ ll the gap with an appropriate insulation or ﬁ ller material.

(8) If the tubing and wiring are to go towards the rear of the unit, make

holes in the wall. (Fig. 3-142)

(9) Measure the thickness of the wall from the inside to the outside and cut

PVC pipe at a slight angle to ﬁ t. Insert the PVC pipe in the wall. (Fig. 3-143)

Slide toward front side

Side panel

Unit

Fig. 3-136

Fixture

Fig. 3-137

Fig. 3-138

Suspension bolt (field supply)

Ceiling surface

Washer (supplied)

Double nut (field supply)

Suspension bolt (field supply) Washer (field supply)

Washer (supplied)

Double nut (field supply)

Fig. 3-140

NOTE

The hole should be made at a slight downward slant to the outside.

Washer

(supplied)

PVC pipe (locally purchased)

Suspension bolt

Fig. 3-139

Fig. 3-141

INSIDE

W all

Approx.

Ceiling surface

Nut (field supply)

63/64

OUTSIDE

PVC pipe

Slight angle

Cut at slight angle

Fig. 3-142

Fig. 3-143

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Page 47

CAUTION

Power supply outlet (ø1-3/16

", knock-out)

Left-side drain hose outlet port

Rear tubing hole

Rear outlet port

Outside air intake duct connection port (ø3-15/16

", knock-out)

Inter-unit control wiring (ø1-3/16

", knock-out, use rubber grommet)

3-42. Duct for Fresh Air

There is a duct connection port (knock-out hole) at the rightrear of the top panel of the indoor unit for drawing in fresh air. If it is necessary to draw in fresh air, remove the cover by opening the hole and connecting the duct to the indoor unit through the connection port. (Fig. 3-144)

3-43. Shaping the Tubing

●

The positions of the refrigerant tubing connections are shown in the ﬁ gure below. (The tubing can be routed in 3 directions.)

* When routing the tubing out through the top or right sides,

knock out the appropriate parts in the top panel and cut notches in the side panel as shown in Fig. 3-129.

* When routing the tubing out through the top, the optional

L-shape tubing kit is required.

Fig. 3-144

If the tubing is to be routed out together, use a box cutter or similar tool to cut out the part of the rear cover indicated by the marked area in the ﬁ gure below, to match the positions of the tubes. Then draw out the tubing.

3-44. Installing the Drain Piping

●

Prepare standard PVC pipe for the drain and connect it to the indoor unit drain pipe with the supplied hose clamps to prevent water leaks.

(1) Drain hose connection

●

The drain hose is connected below the refrigerant tubing.

(2) Installing the drain hose

●

On the unit drain side, grasp the hose band with pliers and insert the drain hose all the way to the base.

●

Do not use adhesive when connecting the supplied drain hose to the drain port (either on the main unit or the PVC pipe).

●

Wrap the hose with the supplied drain hose insulation and use the 4 twist ties so that the hose is insulated with no gaps.

●

Connect the drain piping so that it slopes downward from the unit to the outside. (Fig. 3-147)

Fig. 3-145 Fig. 3-146

Good

Not good

Fig. 3-147

●

Attach so that the hose band fastener is on the side of the drain port.

●

Attach the hose bands so that each is approximately 13/64 – 63/64 in. from the end of the supplied drain hose.

Rear cover

Downward gradient

Min. 1/100

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Page 48

●

CAUTION

Never allow traps to occur in the course of the piping.

●

Insulate any piping inside the room to prevent dripping.

●

After the drain piping, pour water into the drain pan to check that the water drains smoothly.

●

If the drain hose is to be raised, use the optional drain up kit. The drain hose can be raised 23-5/8" above the top of the main unit. (For details, refer to the manual of the optional part.)

* If the drain hose is

routed through the left

Screwdriver

Drain port

side, refer to Fig. 3-145, and follow the procedure above to install the hose. Re-

Rubber stopper

Fig. 3-148

attach the rubber stopper that was earlier removed onto the right side. (Fig. 3-148) The rubber stopper can be inserted easily by using a screwdriver or similar tool to press the stopper into the drain port on the main unit. Press the stopper into the main unit drain port as far as it will go.

Unit drain port

13/64

63/64 63/64

Unit drain pan

Twist tie (4 ties)

5-33/64

13/64

Hard PVC pipe (equivalent to VP-20) (Field supply)

Drain hose (supplied)

Hose band (2 bands, supplied)

Position to fasten hose bands

Drain hose insulation (supplied)

Fig. 3-149

Check local electrical codes and regulations before wiring. Also, check any speciﬁ ed instruction or limitations.

Unit: in.

How to carry out power supply wiring

(1) Wiring connection ports The power inlet ports are located at the rear and top. The remote control wiring inlet ports are located at the rear and top (for use with the wired remote controller). For details, refer to Fig. 3-144. For the method used to insert the wiring, refer to the ﬁ gure below. (Fig. 3-150)

When removing the fastening bracket from the cover of the electrical component box, use caution to avoid dropping the bracket.

(2) How to carry out wiring

●

Open the knock-out hole on the rear or top of the main unit. Attach the supplied rubber grommet and pull the power wiring into the main unit.

●

Feed the wiring into the wiring inlet port on the electrical component box. Connect the wiring to the terminal plate and fasten in place with the supplied clamp.

●

Perform electrical and grounding work in accordance with the package A/C power speciﬁ cations, and following local electrical codes and regulations.

Inter-unit control wiring

ø1-9/32 knock-out

Eyelet (supplied)

Power supply outlet

Fig. 3-150

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Page 49

Wall Mounted Type (K1 Type) ■

CAUTION

3-45. Removing the Rear Panel from the Unit

(1) Remove the set screws used to fasten the rear panel to the

indoor unit during transportation.

(2) Press up on the frame at the 2 locations shown by the arrows

in the ﬁ gure at right, and remove the rear panel.

Screws used during transportation

NOTE

Tubing can be extended in 4 directions as shown in Fig. 3-152. Select the direction which will provide the shortest run to the outdoor unit.

Except S-18MK1U6, S-19MS1U6

Left tubing

Left-rear tubing

Right-rear tubing (recommended)

Right tubing

Fig. 3-152-1

3-46. Selecting and Making a Hole

(1) Remove the rear panel from the indoor unit and place it on

the wall at the location selected. Fix the rear panel and hook the unit onto it temporarily. Make sure the unit is horizontal using a level gauge or tape measure to measure down from the ceiling.

(2) Determine which notch of the rear panel should be used.

(Fig. 3-153)

(3) Before drilling a hole, check that there are no studs or pipes

behind the determined location. The above precautions are also applicable if tubing goes through the wall in any other location.

(4)

Using a sabre saw, key hole saw or hole-cutting drill attachment, make a hole (dia. 3-5/32") in the wall. (Fig. 3-154)

(5) Measure the thickness of the wall from the inside edge to the

outside edge and cut the PVC pipe at a slight angle 15/64" shorter than the thickness of the wall. (Fig. 3-155)

(6) Place the plastic cover over the end of the pipe (for indoor

side only) and insert in the wall. (Fig. 3-156)

Press

Remove the rear panel

Fig. 3-151

For S-18MK1U6, S-19MS1U6

Left tubing

Left-rear tubing

Right-rear tubing (recommended)

Fig. 3-152-2

For S-07MK1U6, S-09MK1U6, S-12MK1U6

Center of left rear tubing hole

Center of right rear tubing hole

For S-18MK1U6, S-19MS1U6, S-24MK1U6

Center of left rear tubing hole

Tubing hole diameter ø3-5/32

Center of right rear tubing hole

Fig. 3-153

Indoor side

Outdoor side

Right-rear

NOTE

The hole should be made at a slight downward gradient to the outside.

Fig. 3-154

Avoid areas where electrical wiring or conduits are located.

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PVC pipe (ﬁ eld supply)

Cut at slight angle

←

INSIDE

Plastic cover

Wall

Fig. 3-155 Fig. 3-156

OUTSIDE

PVC pipe

Slight angle

→

Page 50

3-47. Installing the Rear Panel onto the Wall

Conﬁ rm that the wall is strong enough to support the unit. See either Item a) or b) below depending on the wall type.

a) If the Wall is Wooden

(1) Attach the rear panel to the wall with the 10 screws provided.

If you are not able to line up the holes in the rear panel with the beam locations marked on the wall, use Rawl plugs or toggle bolts to go through the holes on the panel or drill 3/16" dia. holes in the panel over the stud locations and then mount the rear panel.

(2) Check with a tape measure or level gauge. This is important

so that the unit is correctly installed. (Fig. 3-157)

(3) Make sure the panel is ﬂ ush against the wall. Any space

between the wall and unit will cause noise and vibration.

b) If the Wall is Brick, Concrete or Similar

Drill 3/16" dia. holes in the wall. Insert Rawl plugs for appropriate mounting screws. (Fig. 3-158)

3-48. Removing the Grille to Install the Indoor Unit

In principle, with this model wiring can be completed without removing the grille. However, if it is necessary to change the settings on the PCB, follow the procedure below excepting S-18MK1U6 and S-19MS1U6.

Removing the grille

(1) Lift up on both sides of the air-intake grille to open it.

(Fig. 3-159)

(2) Remove the ﬁ lter. (Fig. 3-159)

(3) Adjust the ﬂ ap so that it is horizontal. (Fig. 3-160)

(4) Open the installation screw covers below the grille

(3 locations). (Fig. 3-160)

(5) Remove the screws. (Fig. 3-160)

(6) Remove the grille. (Fig. 3-161)

Attaching the grille

(1) Close the ﬂ ap.

(2) Keep the grille installation tabs aligned with the top portion of

the grille, and reinstall the lower portion of the grille. Fit the installation tabs into the grooves and press the lower portion of the grille back into its original position to install it.

(3) Press on the installation tabs to completely close the grille.

Check that the grille and frame are ﬁ tted tightly together.

Filter

Flap

Fig. 3-157

3/16" dia. hole

Rawl plug

Fig. 3-158

Intake grille

Open the grille

Fig. 3-159

Installation screw cover

Fig. 3-160

Remove the grille

Fig. 3-161

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Page 51

3-49. Preparing the Tubing

(1) Arrangement of tubing by directions

a) Right or left tubing

The corner of the right or left frame should be cut with a hack saw or similar. (Fig. 3-162)

b) Right-rear or left-rear tubing

In this case, the corners of the frame do not need to be cut.

(2) Be sure to insulate the part of the drain hose that is run

indoors, and the refrigerant tubing. If these are not insulated, condensation may result in dripping and damage to walls and furniture. The ﬂ are nuts on the 24-type (only) are large; therefore, use the supplied insulation material.

(3) To mount the indoor unit on the rear panel.

1. When installing the indoor unit, position the indoor unit onto the installation tabs on the upper part of the rear panel. (Fig. 3-163)

2. Press on the air outlet to hold it in place, and press the lower part of the indoor unit until a “click” sound is heard and the indoor unit is securely fastened to the installation tabs on the lower side of the rear panel. (Fig. 3-164)

Raising the clamp to lift up the indoor unit will facilitate this

work. (Fig. 3-165)

To remove the indoor unit, press up on the 2 locations

marks) on the lower part of the unit frame to disconnect the

( installation tabs. Refer to Section 3-45. “Removing the Rear Panel from the Unit” (Fig. 3-151). Then lift up the indoor unit to remove it.

Frame

Right tubing outlet

When left and right side tubing

Fig. 3-162

Installation tabs

Fig. 3-163

Press

Fig. 3-164

Clamp

Fig. 3-165

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Page 52

3-50. Shaping the Tubing

WARNING

Right-rear tubing

(1) Shape the refrigerant tubing so that it can easily go into the

hole. (Fig. 3-166)

(2) After performing a leak test, wrap both the refrigerant tubing

and drain hose together with insulating tape. The drain hose should be positioned below the refrigerant tubes, and should be given sufﬁ cient space so that no strong tension is applied to it.

(3) Push the wiring, refrigerant tubing and drain hose through the

hole in the wall. Adjust the indoor unit so it is securely seated on the rear panel.

Left or left-rear tubing

(1) Pass the tubing and drain hose into the rear of the indoor unit.

Provide sufﬁ cient length for the connections to be made. Next, bend the tubing with a pipe bender, and connect them. (Fig. 3-167)

(2) After performing a leak test, wrap the refrigerant tubing and

drain hose together with insulating tape, as shown in the ﬁ gure at right. (Fig. 3-168) Then ﬁ t the tubing into the tubing storage space in the rear of the indoor unit and clamp in place.

(3) Adjust the indoor unit so that it is securely installed onto the

rear panel.

Rear panel tab

Plastic cover

Insulating tape

Drain hose

Insulating

tape

Fig. 3-166

Fig. 3-167

Refrigerant

tubing

Indoor and outdoor unit connection wiring

Insulation

Refrigerant tubing

Rear panel

Inter-unit wiring

NOTE

It is necessary to install the external electronic expansion valve kit for the model S-19MS1U6. For installation, refer to “3-53. External Electronic Expansion Valve Kit (CZ-P56SVK1U)”.

3-51. Installing the Drain Hose

a) The drain hose should be slanted downward to the outside.

(Fig. 3-169)

b) Never form a trap in the course of the hose.

c) If the drain hose will run in the room, insulate the hose* so that

chilled condensation will not damage furniture or ﬂ oors. * Foamed polyethylene or its equivalent is recommended.

Do not supply power to the unit or operate it until all tubing and wiring to the outdoor unit are completed.

Fig. 3-168

Indoor unit

Slant

Refrigerant tubing

Fig. 3-169

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Page 53

3-52. When Using Wireless Remote Controller Instead of Wired Remote Controller

When the wireless remote controller is to be used, slide the switch on the indoor unit control PCB.

●

If this setting is not made, an alarm will occur. (The operation lamp on the display blinks.)

●

This setting is not necessary if both the wired remote controller and wireless remote controller are used.

●

The location of the switch varies depending on the type of PCB used. Check the model name before making the setting.

NOTE

This setting is necessary also in case of “non-using wired/wireless” remote controller. (ex. central control using only an intelligent/system controller)

●

S-07MK1U6 / S-09MK1U6 / S-12MK1U6

●

S-18MK1U6 / S-19MS1U6 / S-24MK1U6

Setting at time of factory shipment

Slide No. 3 on SW101 from ON ➞ OFF.

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Page 54

3-53. External Electronic Expansion Valve Kit (CZ-P56SVK1U)

WARNING

CAUTION

Precautions in this manual are given in the form of “Warnings” or “Cautions.” Both types of precautions contain important information related to your safety, the safety of users, and the correct operation, installation, or maintenance of the air conditioning system. Be sure to carefully observe all relevant precautions.

This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death.

This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage.

●

This external electronic expansion valve is compatible with the refrigerants listed below. R410A, R407C, R22

1. Checking Parts

Please check these parts below that came in the box.

Description Shape Q’ty Description Shape Q’ty

Clamp

External electronic

expansion valve

(Extension cord 26.2 ft.)

(Large: 13-25/32", Small: 7-7/8")

4 Installation manual

Large: 2

Small: 4

2 Flare insulator

2 5 Insulating tape

White (heat resisting)

2. Positioning for Installation

●

The valve should be connected to the liquid tube. Determine the position for installation referring to the diagram of outer dimensions. (Fig. 3-170) Refrigerant-ﬂ ow noise may occur from the external electronic expansion valve. As a guide, the distance from the indoor unit should be a minimum of 16.4 feet, but less than 26.2 feet. (Install away from locations where strictly quiet operation is required.) If this distance is unavailable, install inside the ceiling or in another location where noise insulation is possible. This is a functional component, and therefore may require inspection and replacement. Consider this when deciding the installation location. (For example, place near an inspection port, or provide one.)

●

This valve is for indoor use. Do not install the valve outdoors.

Diagram of outer dimensions

Indoor

side

Connecting portion B

Extension cord (26.2 ft.)

Connecting portion B

(2-3/4)

Outdoor

side

(8-5/64)

(10-53/64)

Type

A B

12-51/64

o 1/4

160

14-11/64

o 3/8

Unit: in.

Fig. 3-170

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Page 55

3. Cutting and Flaring of Liquid Tube

CAUTION

After determining the position for installation, cut the liquid tube and ﬂ are the connecting portion. (Pay attention to the notes below when ﬂ aring the tubes.)

NOTE

●

After cutting the tube, deburr and ﬁ nish the end face smoothly and correctly.

●

Do not damage tubes while ﬂ aring.

●

Take care not to allow dirt and deburred chips into the tube.

●

Use the ﬂ are nut which came with External Electronic Expansion Valve Kit.

●

The ﬂ aring dimensions for R410A are different from the conventional dimensions for R407C and R22. For R410A, the specially created ﬂ aring tool is recommended. However a conventional tool can be used by adjusting the amount of copper tube projection as shown in the table below.

Unit : in.

Rigid (clutch type)

R410A R407C, R22

If special R410A tool is used

B = 0 - 1/64 3/64 - 1/16 0 - 1/64

If conventional tool is used

Copper tube projection for flaring: B (in.)

Fig. 3-171

4. Connection of External Electronic Expansion Valve with Tubing

In connection with tubing, take care to ﬁ t the external electronic expansion valve in the right direction. Be sure to install with the mark on the label pointing upwards. Also when connecting the ﬂ are, use the arrow marks on the label to check the directions of the indoor unit side and outdoor unit side. (The wiring outlet side faces the indoor unit.) (Refer to Fig. 3-172.)

Do not exceed

10 degrees

Do not exceed

10 degrees

Do not exceed 10 degrees

Attached label on the unit

EXTERNAL ELECTRONIC EXPANSION VALVE KIT

SOURCE

SERIAL NO.

INDOOR

SIDE

OUTDOOR

SIDE

MUST BE INSTALLED AS ARROWS.

Fig. 3-172

●

Tightening ﬂ are nuts

Be sure to use 2 spanners together when removing or tightening the ﬂ are nuts. After connection with the tubing, tighten the ﬂ are nuts by the correct torque. Failure to tighten the nuts correctly can cause loosening and damage on the ﬂ ared portion, resulting in accidents by oxygen deﬁ ciency due to refrigerant leaks.

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Tubing size Tightening torque

1/4" (Ø6.35)

3/8" (Ø9.52)

120 - 160 lbs • inch

(140 - 180 kgf • cm)

300 - 360 lbs • inch

(340 - 420 kgf • cm)

Page 56

5. Flare Insulation of Tubing

After completing a leakage test, apply heat insulation. (Fig. 3-191)

* Use the ﬂ are insulator provided with the product.

Outdoor sideIndoor side

Insulating tape Flare insulator

Clamps (small)

Be careful not to allow a gap to occur between the thermal insulation of the tubing and the thermal insulation of the main unit.

Insulating tape

Flare insulator

Clamps (small)

Fig. 3-173

6. Securing the External Electronic Expansion Valve After Connection with Tubing

After connection with tubing, secure the external electronic expansion valve using the supplied clamps (large) to hold it against the gas tube. (Fig. 3-174)

Clamp (large)

Gas tube

Clamp (large)

Liquid tube

* Be careful not to tighten the clamps with excessive force in order to avoid deforming the tubing or other parts.

Fig. 3-174

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Page 57

7. Wiring Procedure

WARNING

Be sure to turn the power off at the mains before removing or connecting connectors to avoid electric shock hazard.

Connection of External Electronic Expansion Valve with Extension Cord

(1) Turn the power off.

(2) Turn the power on.

(3) Wait 1 minute after the power is on and then turn the power off again at the mains.

* The electronic expansion valve becomes full-open in the 1 minute.

Do not give instructions for operation through the remote controller during this time.

(4) Open the electrical component box. From the control PCB, disconnect the connector to the indoor unit internal

electronic expansion valve.

(5) Connect the external electronic expansion valve connector to the indoor unit control PCB (PMV). (Fig. 3-175)

After completing the wiring process, close the cover of the electrical component box.

(6) Turn on the main breaker. This procedure is now completed.

Indoor unit

PCB

Connect to PMV

Fig. 3-175

The model S-19MS1U6 is only applied for the following procedure.

(1) Turn the power off.

(2) Open the electrical component box.

(3) Connect the external electronic expansion valve connector to the indoor unit control PCB (PMV). (Fig. 3-176)

After completing the wiring process, close the cover of the electrical component box.

(4) Turn on the main breaker. This procedure is now completed.

Indoor unit

PCB

Connect to relay connector

(white 6P)

Fig. 3-176

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Page 58

Floor Standing Type (P1 Type) ■ Concealed Floor Standing Type (R1 Type)

3-54. Required Minimum Space for Installation and Service

Install the unit where cooled or heated air from the unit can circulate well in the room. Do not put obstacles which may obstruct the air ﬂ ow in front of the air intake and outlet grilles.

Horizontal view Vertical view

min.

3-15/16"

min. 3.3 ft.

min.

3-15/16"

min. 3.3 ft.

NOTE

Ensure there is adequate space for maintenance of the electrical component box, air ﬁ lter, and refrigerant tubes.

3-55. Dimensions and Part Names

Floor Standing Type (P1 Type)

4-Ø15/32" holes (for fastening the indoor unit to the ﬂ oor with

screws) Air ﬁ lter Refrigerant connection outlet (liquid tube) Refrigerant connection outlet (gas tube) Level adjusting bolt Drain outlet (20 A) Power cord outlet (downward, rear) Refrigerant tubing outlet (downward, rear) Location for mounting the remote controller

(remote controller can be attached within the room)

6-11/32

Fig. 3-177

Length

Type

7, 9, 12 41-59/64 26-3/16 24-7/8

15, 18

24 Ø3/8 Ø5/8

1-1/32

ABC

54-21/64 38-37/64 37-9/32

2-1/424-7/32

19/32

Liquid

tube

Ø1/4 Ø1/2

Unit: in.

Gas

tube

1-3/8

2-1/8 2-1/8

C B

Air outlet

Air inlet

(59/64)

19/32

63/64

Fig. 3-178

3-15/16

Refrigerant tubing space for downward tubing

Rear-tube outlet

6-31/32

9-5/32

Side panel

9-17/64

2-23/32

8-5/32

8-17/64

2-61/64

8-5/16

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Page 59

Concealed Floor Standing Type (R1 Type)

4-Ø15/32" holes (for fastening the indoor unit to the ﬂ oor with screws) Air ﬁ lter Refrigerant connection outlet (liquid tube) Refrigerant connection outlet (gas tube) Level adjusting bolt Drain outlet (20 A) Flange for air-outlet duct

Length

Type

7, 9, 12 35-19/32 27-1/4 26-29/64 26-3/16 19-11/16 3-25/64

15, 18

24 Ø3/8 Ø5/8

ABCDEF

47-63/64 39-41/64 39-29/64 38-37/64 35-7/16 2-1/64

3-15/16 2-13/64

Liquid

tube

Ø1/4 Ø1/2

Unit: in.

Gas

tube

6-17/32

C (Internal dimension)

E (Hole Pitch : 3-15/16)

16-21/32

3-51/64

1-3/16 1-3/16

Air outlet

Air inlet

(15/16)

1-26/32

24-1/4

9-1/64

4-59/64

6-7/64 2-19/32

21-7/32

15-53/64

10-15/64

5-25/32

8-5/64

Unit: in.

Fig. 3-179

NOTE

Make an opening in the housing of the unit so that maintenance service can be peformed on the electrical component box, air ﬁ lter, refrigerant tubing connection, and drain pipe.

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3-56. Removing and Attaching the Front Panel

Cut off the both binding straps.

Removing the front panel

Expose the tip of the dewprevention heater from the glass fiber tube.

Disengage the lead-wire connector from the dewprevention heater.

Tighten the glass fiber tube with the binding strap at both side.

Attaching the front panel

Expose the tip of the dewprevention heater from the glass fiber tube.

Connect each other.

(Floor Standing Type)

NOTE

A dew-prevention heater is secured behind the front panel. When removing or attaching the panel, take care not to damage the lead wire to the heater.

How to remove the front panel

(1) Remove the 2 screws at the lower part of the front

panel.

(2) Holding A at the upper right of the unit, push up at B

at the lower right of the panel. The right side of the

front panel is removed. Then remove the left side of

the front panel following the same procedure.

(3) Cut off the binding strap to loosen the glass ﬁ ber tube.

(4) Disengage the lead-wire connector from the

dewprevention heater by pressing the tab.

(5) Remove the string connecting the front panel of the

unit by unhooking it from the ﬁ xture attached to the

panel.

Front panel

Tab

Side panel

Fig. 3-180

How to attach the front panel

(1) Hook the string to the ﬁ xture of the front panel.

(2) Expose the tip of the dew-prevention heater from the

glass ﬁ ber tube in order to make connection smoothly.

(3) Connect the lead-wire connector to the dew-

prevention heater until the click sounds.

(4) After the connection, tighten the glass ﬁ ber tube

nearby connected area inside the tube with the

binding strap.

(5) Align the slots at the lower part of the front panel to

the tabs at the lower part of the indoor unit and put the

upper trim tab of the front panel on the groove of the

unit. Then press down the panel.

(6) Insert the 2 screws at the lower part of the front panel.

3-57. Installing the Refrigerant Tubing

(1) When connecting the gas tube use the supplied

tubing.

(2) Tubes can be extended in 2 directions: downward and

at rear.

For Floor Standing type

• When a rear tube is required, it can run through the rear-tube outlet of the rear panel.

• When a downward tube is required, refer to the opening dimensions shown in Fig. 3-182.

Fixture

Dew-prevention heater

Holes for fixing the unit to the floor

Front panel

6-37/64"

Fig. 3-181

Fig. 3-182

String

6-31/32"

Lead-wire connector

(4P WHT)

Rear-tube outlet

Refrigerant tubing space for downward tubing

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Page 61

CAUTION

Insulate both gas and liquid

CAUTION

tubes.

●

To insulate tubes

(1) Wrap the ﬂ are nuts with the supplied white insulating tape.

(2) Wrap the ﬂ are nuts with the supplied ﬂ are insulator.

(3) Fill the clearance between the union insulator and ﬂ are insulator

with black insulating tape. Fasten both ends of the ﬂ are insulator with the supplied vinyl clamps.

3-58. Installing the Drain Piping

Water leaks may occur if the drain pipes are connected inadequately.

(1) When rear-side drain piping is required bend the drain hose

attached to the indoor unit by 90° . Connect a drain pipe (ﬁ eld supply) to the drain hose through the rear tubing outlet in the rear panel. Use a hard PVC pipe (VP20) for the drain piping.

(2) Ensure that the drain pipe has a downward gradient of 1/100 or

more and that there are no water traps.

(3) Provide insulation for the drain pipe.

(4) After the drain piping is completed, pour water into the drain pan

to check that the water drains smoothly.

(5) Remove any dust or debris in the drain pan so that the pipe is not

clogged.

Insulating tape (black)

Insulating tape (white)

Insulator

Drain hose

Drain pipe (PVC)

Drain hose (supplied)

Flare insulator

Flare nut

Vinyl clamps

Fig. 3-183

Fig. 3-184

Drain insulator (supplied)

Insulating tape

3-59. Installing the Remote Controller

A remote controller (optional wired remote controller) can be mounted in the indoor unit (Floor Standing type).

(1) Remove the cover of the optional wired remote controller.

(Fig. 3-186)

(2) Remove the front panel. Remove the screws and ﬁ xture.

(Fig. 3-187)

(3) Place the remote controller into the space in the unit as shown in

Fig. 3-187. Assemble the lead wires of the remote controller to its rear side center and route them to the lead wire guide.

(4) Secure the ﬁ xture using the supplied screws.

Fig. 3-186

To remove the cover from the remote controller, insert a screwdriver between the cover and the controller as shown in the ﬁ gure above, and pry off the cover.

Hard PVC pipe VP20

(field supply)

Lead wire guide

Vinyl clamp (supplied)

Hose band (supplied)

Vinyl clamps (supplied)

Fig. 3-185

Remote Controller

Screw

Fig. 3-187

Insulating tape (supplied)

Drain hose insulator (field supply)

Fixture

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Page 62

SUPPLEMENT ON DRAIN PIPING ■

1. Drain hose installation

Drain port

(Drainage check section on drain port, transparent, ABS resin)

Indoor unit

Do not use adhesive here.

Drain port may possibly be damaged

* Apply approx. 0.07 oz of the adhesive on both sides of the

if PVC adhesive is used.

Align the hose band with end of the hose and tighten so that it does not contact the bead. (Torque 21 - 29 lbs./in.)

1/4 in. or more

Indoor unit

Hose band

(supplied)

Soft PVC socket

Bead

13/16 in. or more

2-1/4 in.

Packing (supplied)

Hard PVC socket (VP25)

Drain hose (supplied)

Adhere with PVC adhesive.

supplied drain hose with a joint socket and hard PVC pipe. Wipe off the protrusion-adhesive with a soft cloth.

Hard PVC pipe (VP25 field supplied)

Note:

Be sure to tightly insert the hard PVC pipe joint (including elbow) minimum 13/16 in. or more.

However, do not use the hard

PVC pipe joint allowable more than 2-1/8 in. insertion.

Drain insulator (supplied)

* After checking the drainage, wrap the supplied packing and drain pipe insulator around the pipe.

NOTE

There is possibility to cause water leakage unless the above steps are carried out.

2. Checkpoint after installation

After installation of indoor and outdoor units, panels and electrical wiring, check the following items.

Checkpoint Symptom Check Remark

Make sure whether indoor and outdoor units are

correctly installed.

2 Make sure whether gas leakage is tested. No cooling, no heating

Make sure whether insulation is completed.

(Refrigerant piping and drain piping)

4 Make sure whether drain water is running smoothly. Water leakage

Make sure whether the power voltage matches the

nameplate.

Make sure whether there is miswiring or incorrect

connection.

Make sure whether the ground construction is

completed.

Make sure whether the wire gauge is followed by the

recommended speciﬁ cations.

Make sure whether the air intake and air outlet of the

indoor and outdoor units are sealed by obstacles.

Fall, vibration, noise

Water leakage

Inoperative, burnout

Ground leakage

Inoperative, burnout

No cooling, no heating

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Page 63

4. ELECTRICAL WIRING

NOTE

4-1. General Precautions on Wiring

(1) Before wiring, conﬁ rm the rated voltage of the unit as

shown on its nameplate, then carry out the wiring closely following the wiring diagram.

(2) Provide a power outlet to be used exclusively for each

unit, and a power supply disconnect, circuit breaker and earth leakage breaker for overcurrent protection should be provided in the exclusive line.

(3) To prevent possible hazards from insulation failure,

the unit must be grounded.

(4) Each wiring connection must be done in accordance

with the wiring system diagram. Wrong wiring may cause the unit to disorder or become damaged.

(5) Do not allow wiring to touch the refrigerant tubing,

compressor, or any moving parts of the fan.

(6) Unauthorized changes in the internal wiring can be

very dangerous. The manufacturer will accept no responsibility for any damage or malfunction that occurs as a result of such unauthorized changes.

(7) Regulations on wire diameters differ from locality to

locality. For ﬁ eld wiring rules, please refer to your LOCAL ELECTRICAL CODES before beginning.

You must ensure that installation complies with all

relevant rules and regulations.

(8) To prevent malfunction of the air conditioner caused

by electrical noise, care must be taken when wiring as follows:

●

The remote control wiring and the inter-unit control wiring should be wired apart from the inter-unit power wiring.

(9) If the power supply cord of this appliance is damaged,

it must be replaced by a repair shop appointed by the manufacture, because special purpose tools are required.

4-2. Recommended Wire Length and Wire Diameter for Power Supply System

Indoor unit

Type

K1 10 – 16 A

D1, U1, Y1, T1, F1, M1, P1, R1 10 – 16 A

E1 10 – 16 A

Control wiring

(A) Inter-unit (between outdoor and

indoor units) control wiring*

AWG #18 (0.75 mm²) AWG #18 (0.75 mm²) AWG #18 (0.75 mm²)

Max. 3,280 ft. Max. 1,640 ft. Max. 650 ft. (Total)

Time delay fuse or

circuit capacity

(B) Remote control wiring (C) Control wiring for group control

* With ring-type wire terminal.

(D) Inter-outdoor unit control wiring

AWG #18 (0.75 mm²)

Max. 980 ft.

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Page 64

4-3. Wiring System Diagram

NOTE

212

Ground

L1 L2

BLK WHT

Power supply

208 / 230V, 60Hz, 1-PH

Remote Controller

WHT BLK

Power supply

208 / 230V, 60Hz, 1-PH

Remote Controller

WHT BLK

Group control:

Power supply

208 / 230V, 60Hz, 1-PH

K1 Type

Power supply

208 / 230V, 60Hz, 1-PH

Remote Controller

BLK WHT

CONNECTOR 2P(WHT)

ex.) W-3WAY ECO-i

Indoor

BLK WHT

unit (No. 1)

Indoor unit (No. 2)

Indoor unit (No. 3)

Indoor unit (No. n)

Outdoor unit

INV unit

Power supply

208 / 230V, 60Hz, 3-PH

Ground

Inter-outdoor unit control wiring

Outdoor unit INV unit

Power supply

208 / 230V, 60Hz, 3-PH

Ground

* NOTE:

* Disconnect switch (Field Supply)

Disconnect Switch may be needed by the National/Local code.

ALWAYS COMPLY WITH NATIONAL AND LOCAL CODE REQUIREMENTS.

(BLU)

Y1, D1, T1, F1, M1, P1, R1 Types 6P terminal board

U1, E1 Types 7P terminal board

1(L1) 2(L2)

Power supply

Unit

control

Line

Remote

control

Line

(1) Refer to Section 4-2. “Recommended Wire Length and

Wire Diameter for Power Supply System” for the explanation of “A,” “B,” “C,” and “D,” in the above diagram.

(2) The basic connection diagram of the indoor unit

shows the 7P terminal board, so the terminal boards in your equipment may differ from the diagram.

(3) Refrigerant Circuit (R.C.) address should be set

before turning the power on.

K1 Type Model : S-07MK1U6

S-09MK1U6 S-12MK1U6

K1 Type Model : S-18MK1U6

S-19MS1U6 S-24MK1U6

L1 L2 U1 U2 R1 R2

Power supply

Unit control

Line

Remote

control

Line

5P terminal board

1(L1) 2(L2) U1 U2

Power supply

Unit

control

Line

5P terminal board

1(L1) 2(L2) U1 U2

Power supply

Unit

control

Line

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Page 65

(1) When linking outdoor units in a network, disconnect the terminal extended from the short plug (CN003, 2P

CAUTION

Black, location: right bottom on the outdoor main control PCB) from all outdoor units except any one of the outdoor units. (When shipping: In shorted condition.)

For a system without link (no connection wiring between outdoor units), do not remove the short plug.

(2) Do not install the inter-unit control wiring in a way that forms a loop. (Fig. 4-1)

Outdoor unitOutdoor unit

Prohibited

Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit

Outdoor unit

Prohibited

Fig. 4-1

(3) Do not install inter-unit control wiring such as star branch wiring. Star branch wiring causes misaddress

setting. (Fig. 4-2)

Outdoor unit

Indoor unit Indoor unit

Branch point

Fig. 4-2

(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.

(Branches less than 3.3 ft. are not included in the total branch number.) (Fig. 4-3)

Outdoor unit Outdoor unit Outdoor unit

Branch point

16 or fewer

Indoor unit

more than 3.3 ft.

Indoor unit

less than 3.3 ft.

Indoor unit

more than 3.3 ft.

Indoor unit

Fig. 4-3

Indoor unit

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Page 66

CAUTION

Loose wiring may cause the terminal to overheat or result in unit malfunction. A ﬁ re hazard may also exist. Therefore, ensure that all

wiring is tightly connected.

When connecting each power wire to the terminal, follow the instructions on “How to connect wiring to the terminal” and fasten the wire securely with the ﬁ xing screw of the terminal plate.

How to connect wiring to the terminal

For stranded wiring

■

(1) Cut the wire end with cutting pliers, then strip the

insulation to expose the stranded wiring approx. 3/8 in. and tightly twist the wire ends. (Fig. 4-4)

(2) Using a Phillips head screwdriver, remove the terminal

screw(s) on the terminal plate.

(3) Using a ring connector fastener or pliers, securely

clamp each stripped wire end with a ring pressure terminal.

(4) Place the ring pressure terminal, and replace and

tighten the removed terminal screw using a screwdriver. (Fig. 4-5)

Special washer

Wire

Stranded wire

Strip 3/8"

Screw

Ring pressure terminal

Terminal plate

Ring pressure terminal

Fig. 4-4

Screw and Special washer

Ring pressure terminal

Wire

Fig. 4-5

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Page 67

4-4. Important Note When Wiring for Common Type

NOTE

Connect the wires referring to the diagram. Note that the control wirings (Low voltages) shall be segregated from the power supply wires (High voltage) as follows:

1. Connect the Inter-unit control wiring to U1/U2

terminals and the remote control wire to R1/R2. (excepting K1 type).

2. Connect the power supply wires to “L1, L2” of the

terminal block. Be sure to connect the grounding conductor of the incoming power supply to the earth (ground) screw.

3. Securely afﬁ x the power supply wires and remote

control wires by the clamping strap or clamping clip not to cross each other and not to leave the wirings loose. When loosening the clamping clip, twist the strap and it will come undone.

Clamping clip

Twist

U1 Type

Earth screw

Power wiring (ﬁ eld supplied)

Clamping clip

Connection for Solenoid Valve Kit (for 3WAY)

Securely afﬁ x the 3-way wiring harness with the remote control wiring (U1 type).

Remote control wiring and Inter-unit control wiring (ﬁ eld supplied)

Conduit (ﬁ eld supplied)

F1 TypeD1 Type

Earth screw

Power wiring (ﬁ eld supplied)

Conduit (ﬁ eld supplied)

Clamping clip

Conduit

Remote control wiring and Inter-unit control wiring (ﬁ eld supplied)

Clamping clip

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Earth screw

Power wiring (ﬁ eld supplied)

Remote control wiring and Inter-unit control wiring (ﬁ eld supplied)

Connection for Solenoid Valve Kit (for 3WAY)

Page 68

Important Note When Wiring for Common Type (Continued)

E1 Type

Remote control wiring and Inter-unit control wiring (ﬁ eld supplied)

Earth screw

Power wiring (ﬁ eld supplied)

Clamping clip

Conduit (ﬁ eld supplied)

T1 Type

Clamping clip

Earth screw

Remote control wiring (ﬁ eld supplied)

Power wiring (ﬁ eld supplied)

Conduit (ﬁ eld supplied)

M1 Type

Earth screw

Power wiring (ﬁ eld supplied)

Clamping clip

Conduit (ﬁ eld supplied)

Remote control wiring and Inter-unit control wiring (ﬁ eld supplied)

P1, R1 Type

Clamping clip

Power wiring (ﬁ eld supplied)

Earth screw

Conduit

Optional remote control wiring (ﬁ eld supplied)

Connection for Solenoid Valve Kit (for 3WAY)

3-way connection wiring with harness(supplied)

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Important Note When Wiring for Common Type (Continued)

K1 Type

Model : S-07MK1U6

S-09MK1U6 S-12MK1U6

Power wiring (ﬁ eld supplied)

Conduit (ﬁ eld supplied)

Clamping strap

Connection for Solenoid Valve Kit (for 3WAY)

Remote control wiring and Inter-unit control wiring (ﬁ eld supplied)

K1 Type

Model : S-18MK1U6

S-19MS1U6* S-12MK1U6

Power wiring (ﬁ eld supplied)

Earth screw

Clamping strap

Conduit (ﬁ eld supplied)

Connection for Solenoid Valve Kit (for 3WAY)

Remote control wiring and Inter-unit control wiring (ﬁ eld supplied)

* Necessary to install the External Electronic Expansion Valve Kit (Optional : CZ-P56SVK1U)

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4-5. Important Note When Wiring for Y1 Type

NOTE

Connect the wires referring to the diagram. Note that the control wirings (Low Voltages) shall be segregated from the power supply wires (High Voltage) as follows:

1. Connect the Inter-unit control wiring to U1/U2

terminals and the remote control wire to R1/R2.

Then place and ﬁ x the two clasps so that the clasps

shall cover both the remote control wires, the Interunit control wiring and the 3-way wiring harness as shown in the magniﬁ ed drawing.

2. Connect the grounding conductor of the incoming

power supply to the earth (ground) screw before connecting the power supply conductors to “L1, L2” of the terminal block.

3. Securely afﬁ x the two power supply conductors (L1,

L2) in the wiring channel by the clamping strap as shown.

Y1 Type

Connection for Solenoid Valve Kit (for 3WAY)

Remote control wiring (ﬁ eld supplied)

Clasp

Power wiring (ﬁ eld supplied)

Conduit (ﬁ eld supplied)

Earth screw

Clamping clip

Take care not to damage the control wirings by the clasp. Do not leave the control wirings loose.

Entirely cover the control wirings (Remote / Inter-unit 3WAY connection)

Remote control wiring and Inter-unit control wiring (ﬁ eld supplied)

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5. HOW TO PROCESS TUBING

NOTE

Deburring

The liquid tubing side is connected by a ﬂ are nut, and the gas tubing side is connected by brazing.

5-1. Connecting the Refrigerant Tubing

Use of the Flaring Method

Many of conventional split system air conditioners employ the ﬂ aring method to connect refrigerant tubes which run between indoor and outdoor units. In this method, the copper tubes are ﬂ ared at each end and connected with ﬂ are nuts.

Flaring Procedure with a Flare Tool

(1) Cut the copper tube to the required length with a tube

cutter. It is recommended to cut approx. 1 – 2 ft. longer than the tubing length you estimate.

(2) Remove burrs at the end of the copper tube with a tube

reamer or ﬁ le. This process is important and should be done carefully to make a good ﬂ are. (Fig. 5-1)

When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube. (Fig. 5-2)

AfterBefore

Fig. 5-1

Copper tubing

Reamer

(3) Remove the ﬂ are nut from the unit and be sure to

mount it on the copper tube.

(4) Make a ﬂ are at the end of copper tube with a ﬂ are

tool. (Fig. 5-3)

A good ﬂ are should have the following characteristics:

●

inside surface is glossy and smooth

●

edge is smooth

●

tapered sides are of uniform length

Fig. 5-2

Flare nut

Copper tubing

Flare tool

Fig. 5-3

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Caution Before Connecting Tubes Tightly

(1) Apply a sealing cap or water-proof tape to prevent

dust or water from entering the tubes before they are used.

(2) Be sure to apply refrigerant lubricant to the matching

surfaces of the ﬂ are and union before connecting them together. This is effective for reducing gas leaks. (Fig. 5-4)

(3) For proper connection, align the union tube and ﬂ are

tube straight with each other, then screw in the ﬂ are nut lightly at ﬁ rst to obtain a smooth match. (Fig. 5-5)

●

Adjust the shape of the liquid tube using a tube bender at the installation site and connect it to the liquid tubing side valve using a ﬂ are.

Cautions During Brazing

●

Replace air inside the tube with nitrogen gas to prevent copper oxide ﬁ lm from forming during the brazing process. (Oxygen, carbon dioxide and Freon are not acceptable.)

●

Do not allow the tubing to get too hot during brazing. The nitrogen gas inside the tubing may overheat, causing refrigerant system valves to become damaged. Therefore allow the tubing to cool when brazing.

●

Use a reducing valve for the nitrogen cylinder.

●

Do not use agents intended to prevent the formation of oxide ﬁ lm. These agents adversely affect the refrigerant and refrigerant oil, and may cause damage or malfunctions.

5-2. Connecting Tubing Between Indoor and Outdoor

Units

(1) Tightly connect the indoor-side refrigerant tubing

extended from the wall with the outdoor-side tubing.

(2) To fasten the ﬂ are nuts, apply speciﬁ ed torque as at

right:

●

When removing the ﬂ are nuts from the tubing connections, or when tightening them after connecting the tubing, be sure to use 2 adjustable wrenches or spanners as shown. (Fig. 5-6) If the ﬂ are nuts are over-tightened, the ﬂ are may be damaged, which could result refrigerant leakage and cause in injury or asphyxiation to room occupants.

●

For the ﬂ are nuts at tubing connections, be sure to use the ﬂ are nuts that were supplied with the unit, or else ﬂ are nuts for R410A (type 2). The refrigerant tubing that is used must be of the correct wall thickness as shown in the table at right.

Apply refrigerant lubricant

Fig. 5-4

Union

Flare nut

Fig. 5-5

Torque wrench

Indoor unit

Outdoor unit

Spanner

Fig. 5-6

Tube diameter

ø1/4" (ø6.35 mm)

ø3/8" (ø9.52 mm)

ø1/2"(ø12.7 mm)

ø5/8" (ø15.88 mm)

ø3/4" (ø19.05 mm)

Because the pressure is approximately 1.6 times

Tightening torque,

approximate

120 – 160 lbs·inch

(140 – 180 kgf·cm)

300 – 360 lbs·inch

(340 – 420 kgf·cm)

430 – 480 lbs·inch

(490 – 550 kgf·cm)

590 – 710 lbs·inch

(680 – 820 kgf·cm)

870 – 1040 lbs·inch

(1000 – 1200 kgf·cm)

Tube thickness

1/32"

(0.8 mm)

1/32"

(0.8 mm)

1/32"

(0.8 mm)

5/128"

(1.0 mm)

over 5/128"

(1.0 mm)

higher than conventional refrigerant pressure, the use of ordinary ﬂ are nuts (type 1) or thin-walled tubes may result in tube rupture, injury, or asphyxiation caused by refrigerant leakage.

●

In order to prevent damage to the ﬂ are caused by over-tightening of the ﬂ are nuts, use the table above as a guide when tightening.

●

When tightening the ﬂ are nut on the liquid tube, use an adjustable wrench with a nominal handle length of 7-7/8 in.

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5-3. Insulating the Refrigerant Tubing

CAUTION

Tubing Insulation

●

Thermal insulation must be applied to all unit tubing, including the distribution joint (purchased separately). (Fig. 5-7)

* For gas tubing, the insulation material must be heat

resistant to 248°F or above. For other tubing, it must be heat resistant to 176°F or above.

Insulation material thickness must be 25/64 in. or greater.

If the conditions inside the ceiling exceed DB 86°F and RH 70%, increase the thickness of the gas tubing insulation material by 1 step.

Two tubes arranged together

Liquid tubing

Insulation

Gas tubing

Three tubes arranged together

Cosmetic (ﬁ nishing) tape

Liquid tubing

Gas tubing

If the exterior of the outdoor unit valves has been ﬁ nished with a square duct covering, make sure you allow sufﬁ cient space to use the valves and to allow the panels to be attached and removed.

Taping the ﬂ are nuts

Wind the white insulation tape around the ﬂ are nuts at the gas tube connections. Then cover up the tubing connections with the ﬂ are insulator, and ﬁ ll the gap at the union with the supplied black insulation tape. Finally, fasten the insulator at both ends with the supplied vinyl clamps. (Fig. 5-8)

Insulation material

The material used for insulation must have good insulation characteristics, be easy to use, be age resistant, and must not easily absorb moisture. (Fig. 5-9)

After a tube has been insulated, never try to bend it into a narrow curve because it can cause the tube to break or crack.

Three tubes arranged together

Balance tubing

Sealer (supplied)

Unit side insulator

Flare nut

Drain insulator and clamp. Large (supplied)

Insulation

Cosmetic (ﬁ nishing) tape

Discharge tubing

Insulation

Fig. 5-7

Insulation tape (white)

(supplied)

Vinyl clamps (supplied)

Fig. 5-8

Refrigerant tubing and insulator (not supplied)

Drain pipe and insulator (not supplied)

Balance tubing

Suction tubing

Liquid tubing

Flare insulator (supplied)

Tube insulator (not supplied) Heat resistant 248°F or above

Packing clamp. Small hose band (supplied)

Flare insulator

Seal

The procedure used for installing the insulator for both gas and liquid tubes are the same.

Insulation tape

Vinyl clamp

Fig. 5-9

Never grasp the drain or refrigerant connecting outlets when moving the unit.

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5-4. Taping the Tubes

NOTE

(1) At this time, the refrigerant tubes (and electrical wiring

if local codes permit) should be taped together with armoring tape in 1 bundle. To prevent the condensation from overﬂ owing the drain pan, keep the drain hose separate from the refrigerant tubing.

(2) Wrap the armoring tape from the bottom of the

outdoor unit to the top of the tubing where it enters the wall. As you wrap the tubing, overlap half of each previous tape turn.

(3) Clamp the tubing bundle to the wall, using 1 clamp

approx. each ft. (Fig. 5-10)

Do not wind the armoring tape too tightly since this will decrease the heat insulation effect. Also ensure that the condensation drain hose splits away from the bundle and drips clear of the unit and the tubing.

5-5. Finishing the Installation

After ﬁ nishing insulating and taping over the tubing, use sealing putty to seal off the hole in the wall to prevent rain and draft from entering. (Fig. 5-11)

Fig. 5-10

Apply putty here

Fig. 5-11

Insulated tubes

Tubing

Clamp

Drain horse

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6. APPENDIX

NAME OF PARTS

■

4-Way Cassette (U1) 4-Way Cassette 60 × 60 (Y1)

Water drain

Ceiling panel (optional)

Air outlet (4 locations)

Air intake grille (air intake)

1-Way Cassette (D1) Low Silhouette Ducted (F1)

Water drain

Air outlet

Ceiling panel (optional)

Air intake

Slim Low Static Ducted (M1) High Static Pressure Ducted (E1)

Rectangular solid duct (optional)

Water drain

Electrical box

Air outlet grille (optional)

Ceiling panel (optional)

Air outlet (4 locations)

Air intake grille (air intake)

Flexible duct (optional)

Water drain

Canvas duct (optional)

Air intake grille (air intake) (optional)

Air intake side duct ﬂ ange (rear)

Water drain

Electrical box

Air outlet side duct ﬂ ange

Air intake side ﬁ lter (rear)

Ceiling (T1) Wall Mounted (K1)

Air outlet

Water drain

(Drain pipe can be connected to either the left or right side.)

Air intake grille (air intake)

Floor Standing (P1) Concealed Floor Standing (R1)

Operation door

(The Remote Controller (sold separately) can be placed inside here.)

Air outlet (Air outlet grille)

Front panel

(A drain pan is provided inside.)

Air intake (air ﬁ lter)

Air intake

Air outlet

Air outlet duct connecting ﬂ ange (optional)

Air outlet

Front panel

Drain pan

Water drain

Air intake (air ﬁ lter)

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Care and Cleaning

WARNING

CAUTION

■

1. For safety, be sure to turn the air conditioner off and also to disconnect the power before cleaning.

2. Do not pour water on the indoor unit to clean it. This will damage the internal components and cause an electric shock hazard.

Air intake and outlet side

(Indoor unit)

Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them with a clean, soft cloth.

If these parts are stained, use a clean cloth moistened with a mild liquid detergent. When cleaning the air outlet side, be careful not to force the vanes out of place.

1. Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe plastic parts using very hot water.

2. Some metal edges and the ﬁ ns are sharp and may cause injury if handled improperly; be especially careful when you clean these parts.

3. The internal coil and other components of the outdoor unit must be cleaned every year. Consult your dealer or service center.

Air filter The air ﬁ lter collects dust and other particles from the air and should be cleaned at

regular intervals as indicated in the table below or when the ﬁ lter indication ( ) on the display of the remote controller (wired type) shows that the ﬁ lter needs cleaning. If the ﬁ lter gets blocked, the efﬁ ciency of the air conditioner drops greatly.

Type U1, Y1 D1, T1 F1, M1, E1 P1, R1 K1

Period Six months Two weeks

(depending on ﬁ lter

speciﬁ cations)

Two weeks Two weeks

*F1, E1 type:

An air filter is not provided with this air conditioner at the time of shipment. To get clean air and to extend the service life of the air conditioner, an air filter must be installed in the air intake. For installation and cleaning the air filter, consult your dealer or service center.

NOTE

The frequency with which the ﬁ lter should be cleaned depends on the environment in which the unit is used.

How to clean the filter 1. Remove the air filter from the air intake grille.

2. Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter,

wash the filter in lukewarm, soapy water, rinse it in clean water, and dry it.

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Care and Cleaning (continued)

CAUTION

■

How to remove the ﬁ lter

4-Way Cassette (U1):

4-way Cassette 60 × 60 (Y1):

1. Use a screwdriver to remove the bolt screw on each side for the two latches. (Be

sure to reattach the two bolt screws after cleaning.)

2. Press on the two latches of the air intake grille with your thumbs in the direction of the arrow to open the grille.

3. Open the air intake grille downward.

●

When cleaning the air ﬁ lter, never remove the safety chain. If it is necessary to remove it for servicing and maintenance inside, be sure to reinstall the safety chain securely (hook on the grille side) after the work.

●

When the ﬁ lter has been removed, rotating parts (such as the fan), electrically charged areas, etc. will be exposed in the unit’s opening. Bear in mind the dangers that these parts and areas pose, and proceed with the work carefully.

4. Remove the air ﬁ lter attached to the air intake grille.

4-Way Cassette (U1)

Latch

Air intake grille

Bolt screws

Safety chain

Air ﬁ lter

4-way Cassette 60 × 60 (Y1)

Latch

Air intake grille

Safety chain

Screw

Air ﬁ lter

1-Way Cassette (D1): 1. Take hold of the ﬁ nger-hold on the air intake grille and press it to the rear, and

the grille will open downward.

2. Take hold of the ﬁ nger-hold on the air ﬁ lter, pull it toward you.

Air ﬁ lter ﬁ nger-hold

Air intake grill

Air ﬁ lter

Slide

Latch

Air ﬁ lter ﬁ nger-hold *Take hold of the ﬁ nger-hold on the air ﬁ lter, pull it toward you.

Hook

Screw

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Care and Cleaning (continued)

■

How to remove the ﬁ lter

Ceiling (T1): 1. Take hold of the ﬁ nger-hold on the air intake grille and press it to the rear, and

(continued)

the grille will open downward.

2. Take hold of the ﬁ nger-hold on the air ﬁ lter, pull it toward you.

Air ﬁ lter ﬁ nger-hold

Air intake grill

Air intake grill ﬁ nger-hold

Screw

Air ﬁ lter

Latch

Air ﬁ lter ﬁ nger-hold *Take hold of the ﬁ nger-hold on the air ﬁ lter, pull it toward you.

Slide

Hook

Screw

Wall Mounted (K1): 1. Move the ﬂ ap on the air outlet grille to its lowest position with the remote

controller.

2. The ﬁ lter is disengaged by pushing the tab up gently. Hold the air ﬁ lter by the tab at the bottom, and pull downward.

Air intake grille

Air ﬁ lter

When replacing the ﬁ lter, make sure that the FRONT mark is facing you. Push it up until you hear it click back into position.

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Care and Cleaning (continued)

■

How to remove the filter

(continued)

Floor Standing (P1)

Concealed Floor Standing (R1):

Cleaning the drain filter

and drain pan

Floor standing (P1):

1. Remove the screw at the bottom left of the front panel using a Phillips head screwdriver.

(Be sure to replace the screw when cleaning is ﬁ nished.)

2. Remove the ﬁ lter by pulling it toward you.

Screw

Air ﬁ lter

Screw

Air ﬁ lter

1. Remove the front panel

Remove the 2 screws ﬁ xed to the bottom of the front panel before opening the panel. • Open the front panel with a lifting motion to detach the latch. Disengage the dew-prevention heater from the lead-wire connector.• Refer to “3-56 Removing and Attaching the Front Panel”.

2. Cleaning

Remove any dirt accumulated in the drain pan, and then wipe it clean. Also, clean the drain ﬁ lter in the same way as the air ﬁ lter.

(1) Push up Then (2) Pull down

Concealed Floor standing

(R1):

Drain pan

Drain ﬁ lter

Latch

Remove the screws, open the front panel, and then remove any dirt accumulated inside the drain pan and wipe it clean. Also, clean the drain ﬁ lter in the same way as the air ﬁ lter.

Front panel

Screw

Drain pan

Drain ﬁ lter

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CAUTION

1. Certain metal edges and the condenser ﬁ ns are sharp and may cause

2. Periodically check the outdoor unit to see if the air outlet or air intake is

3. The internal coil and other components of the outdoor unit must also be

Care: After a prolonged idle period

Check the indoor and outdoor unit air intakes and outlets for blockage; if there is a blockage, remove it.

Care: Before a prolonged idle period

●

injury if handled improperly; special care should be taken when you clean these parts.

clogged with dirt or soot.

cleaned periodically. Consult your dealer or service center.

Operate the fan for half a day to dry out the inside. Disconnect the power supply and also turn off the circuit breaker. Clean the air ﬁ lter and replace it in its original position. Outdoor unit internal components must be checked and cleaned periodically.

Contact your local dealer for this service.

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Troubleshooting

■

If your air conditioner does not work properly, ﬁ rst check the following points before requesting service. If it still does not work properly, contact your dealer or a service center.

Trouble Possible Cause Remedy

Air conditioner does not run at all.

1. Power failure.

2. Leakage circuit breaker has tripped.

3. Line voltage is too low.

4. Operation button is turned off.

5. The wireless remote controller or heat

1. Restore power.

2. Contact service center.

3. Consult your electrician or dealer.

4. Press the button again.

5. Consult your dealer.

pump is malfunctioning.

6. Batteries in wireless remote controller

6. Replace batteries.

have run down.

Compressor runs but soon

1. Obstruction in front of condenser coil. 1. Remove obstruction.

stops. Poor cooling (or heating)

performance.

1. Dirty or clogged air ﬁ lter.

2. Heat source or many people in room.

3. Doors and/or windows are open.

1. Clean the air ﬁ lter to improve the airﬂ ow.

2. Eliminate heat source if possible.

3. Shut them to keep the heat (or cold) out.

4. Obstacle near air intake or air

4. Remove it to ensure good airﬂ ow.

discharge port.

5. Thermostat is set too high for cooling

5. Set the temperature lower (or higher).

(or too low for heating).

Lamps on the indoor unit are

6. (Outdoor temperature is too low.)

7. (Defrosting system does not work.)

1. Trouble in wiring system. 1. Contact service center.

6. (Try to use a back-up heater.)

7. (Consult your dealer.)

ﬂ ashing.

Tips for Energy Saving

■

Avoid Do not block the air intake and outlet of the unit. If either is obstructed, the

●

unit will not work well, and may be damaged.

●

Do not let direct sunlight into the room. Use sunshades, blinds or curtains. If the walls and ceiling of the room are warmed by the sun, it will take longer to cool the room.

Do Always try to keep the air ﬁ lter clean. (Refer to “Care and Cleaning”.) A clogged

●

ﬁ lter will impair the performance of the unit.

●

To prevent conditioned air from escaping, keep windows, doors and any other openings closed.

NOTE

Should the power fail while the unit is running

If the power supply for this unit is temporarily cut off, the unit will automatically resume operation once power is restored using the same settings before the power was cut off.

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DC0811-10911

Printed in Japan

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