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

...

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)

(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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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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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

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.

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

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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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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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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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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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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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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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

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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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

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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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

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