Sanyo AHX0952 User Manual

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Page 1

 R410A Models

Indoor Units

INSTALLATION INSTRUCTIONS

– Mini ECO-i System Air Conditioner –

for Refrigerant R410A

Class 7 9 12 18 24 36 48

X 4-Way Air Discharge Semi-Concealed Type XHX1252 XHX1852 XHX2452 XHX3652

A 1-Way Air Discharge Semi-Concealed Type AHX0752 AHX0952 AHX1252

U Concealed Duct Type UHX0752 UHX1252 UHX1852 UHX2452 UHX3652

T Ceiling-Mounted Type THX1252 THX1852 THX2452

K Wall-Mounted Type KHX0752 KHX0952 KHX1252 KHX1852 KHX2452

Concealed Duct

High-Static Pressure Type

DHX3652 DHX4852

Outdoor Units

Class 36 60

C Mini ECO-i CHX03652 CHX06052

* Refrigerant R410A is used in the outdoor units.

Optional Controllers

Timer Wired Remote Controller RCS-TM80BG

Wireless Remote Controller (For U, D Type) RCS-BH80AAB.WL

Wireless Remote Controller (For X Type) RCS-SH80AAB.WL

Wireless Remote Controller (For A, T Type) RCS-TRP80AAB.WL

RC Wireless Remote Controller (For K Type) RCS-SH1AAB

Simplified Remote Controller RCS-KR1AGB

System Controller SHA-KC64UG

Intelligent Controller SHA-KT256BA

Communication Adaptor SHA-KA128AAB

Remote Sensor ART-K45AGB

LonWorks Interface SHA-LN16UAB

85464359981002 ©SANYO 2006 SANYO Electric Co., Ltd.

Gunma, Japan

Page 2

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 efficiently.

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.



This product is intended for professional use. Permission from the power supplier is required when installing an outdoor unit that is connected to a 16 A distribution network.



Pay close attention to all warning and caution notices given in this manual.

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 certified 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

reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.

When Installing…

…In a Room

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

…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 baffle.

…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 flame as this will cause the generation of poisonous gas.

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• Apply refrigerant lubricant to the matching surfaces of the flare 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.

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 overheating at connection points and a possible fire hazard.

When Wiring

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

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

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 fingers and clothing away from any moving parts.

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

CAUTION

• Ventilate any enclosed areas when installing or testing the refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas.

• Confirm 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.

Page 3

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 floor 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). In a room where the density may exceed the limit, create an opening with adjacent rooms, or install mechanical ventilation combined with a gas leak detection device. The density is as given below.

Total amount of refrigerant (oz)

Min. volume of the indoor unit installed room (ft.3)

Density limit (oz/ft.3)

The density limit of refrigerant which is used in multi air conditioners is 0.3 oz/ft.

NOTE

1. If there are 2 or more refrigerating systems in a single refrigerating device, the amount of refrigerant should be as charged in each independent device.

For the amount of charge in this example:

e.g., charged amount (353 oz)

Indoor unit

Room A Room B Room C Room D Room E Room F

The possible amount of leaked refrigerant gas in rooms A, B and C is 353 oz. The possible amount of leaked refrigerant gas in rooms D, E and F is 529 oz.

(ISO 5149).

Outdoor unit

e.g., charged amount (529 oz)

2. The standards for minimum room volume are as follows.

(1) No partition (shaded portion)

(2) When there is an effective opening with the adjacent

room for ventilation of leaking refrigerant gas (opening without a door, or an opening 0.15% or larger than the respective floor spaces at the top or bottom of the door).

Outdoor unit

Refrigerant tubing

Indoor unit

(3) If an indoor unit is installed in each partitioned room

and the refrigerant tubing is interconnected, the smallest room of course becomes the object. But when mechanical ventilation is installed interlocked with a gas leakage detector in the smallest room where the density limit is exceeded, the volume of the next smallest room becomes the object.

Refrigerant tubing

Outdoor unit

Very small room

Small room

Mechanical ventilation device – Gas leak detector

Medium room

Large room

Indoor unit

3. The minimum indoor floor space compared with the amount of refrigerant is roughly as follows (when the ceiling is 8.8 ft. high):

ft.

4000

Range below the density limit of

0.3 oz/ft. (countermeasures not needed)

500

Range above the density limit of

0.3 oz/ft. (countermeasures needed)

400200 600 800 1000 1200

Total amount of refrigerant

Min. indoor volume

3500

3000

2500

2000

1500

1000

454

398

341

284

227

170

114

ft.

Min. indoor floor area

(when the ceiling is 8.8 ft. high)

Page 4

Precautions for Installation Using New Refrigerant

1. Care regarding tubing

1-1. Process tubing

 Material: Use C1220 phosphorous deoxidized copper specified in JIS H3300 “Copper and Copper Alloy Seamless

Pipes and Tubes.”

 Tubing size: Be sure to use the sizes indicated in the table below.

 Use a tube cutter when cutting the tubing, and be sure to remove any flash. This also applies to distribution joints

(optional).

 When bending tubing, use a bending radius that is 4 times the outer diameter of the tubing or larger.

Use sufficient care in handling the tubing. Seal the tubing ends with

CAUTION

Material O

Copper tube

Outer diameter 1/4 (6.35) 3/8 (9.52) 1/2 (12.7) 5/8 (15.88) 3/4 (19.05)

Wall thickness 1/32 (0.8) 1/32 (0.8) 1/32 (0.8) 5/128 (1.0) 5/128 (1.0)

1-2. Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410A

refrigerant deterioration and compressor defects. Due to the features of the refrigerant and refrigerating machine oil, the prevention of water and other impurities becomes more important than ever.

caps or tape to prevent dirt, moisture, or other foreign substances from entering. These substances can result in system malfunction.

Unit: in. (mm)

2. Be sure to recharge the refrigerant only in liquid form.

2-1. Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and cause

defects of the unit.

2-2. Since refrigerant composition changes and performance decreases when gas leaks, collect the remaining

refrigerant and recharge the required total amount of new refrigerant after fixing the leak.

3. Different tools required

3-1. Tool specifications have been changed due to the characteristics of R410A.

Some tools for R22- and R407C-type refrigerant systems cannot be used.

Item compatible Remarks

Manifold gauge Yes No Types of refrigerant, refrigerating machine oil, and

Charge hose Yes No To resist higher pressure, material must be changed.

Vacuum pump Yes Yes Use a conventional vacuum pump if it is equipped

Leak detector Yes No Leak detectors for CFC and HCFC that

Flaring oil Yes No For systems that use R22, apply mineral oil (Suniso oil)

New tool?

R407C tools

with R410A?

pressure gauge are different.

with a check valve. If it has no check valve, purchase and attach a vacuum pump adapter.

react to chlorine do not function because R410A contains no chlorine. Leak detector for HFC134a can be used for R410A.

to the flare nuts on the tubing to prevent refrigerant leakage. For machines that use R407C or R410A, apply synthetic oil (ether oil) to the flare nuts.

Manifold gauge

Vacuum pump

Outlet Inlet

* Using tools for R22 and R407C and new tools for R410A together can cause defects.

Page 5

3-2. Use R410A exclusive cylinder only.

Single-outlet valve

(with siphon tube) Liquid refrigerant should be recharged with the cylinder standing on end as shown.

New refrigerant R410A cannot be used for earlier models

1. Compressor specifications are different.

If recharging a R22 or R407C compressor with R410A, durability will significantly decrease since some of the materials used for compressor parts are different.

Valve

Liquid

2. Existing tubing cannot be used (especially R22).

Completely cleaning out residual refrigerating

machine oil is impossible, even by flushing.

3. Refrigerating machine oil differs (R22).

Since R22 refrigerating machine oil is mineral oil, it does not dissolve in R410A. Therefore, refrigerating machine oil discharged from the compressor can cause compressor damage.

R22 refrigerating machine oil Mineral oil (Suniso oil)

R407C refrigerating machine oil Synthetic fluid (ether oil)

R410A refrigerating machine oil Synthetic fluid (ether oil)

R410A

Page 6

CONTENTS

Page

IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Please Read Before Starting

Check of Density Limit

Precautions for Installation Using New Refrigerant

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

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 1-5. Tubing Size 1-6. Straight Equivalent Length of Joints 1-7. Additional Refrigerant Charge 1-8. System Limitations 1-9. Tubing Length 1-10. Check of Limit Density 1-11. Installing Distribution Joint 1-12. Optional Distribution Joint Kit 1-13. Example of Tubing Size Selection and

Refrigerant Charge Amount

2. SELECTING THE INSTALLATION SITE . . . . . 17

2-1. Indoor Unit 2-2. Outdoor Unit 2-3. Air-Discharge Chamber for Top Discharge 2-4. Installing the Unit in Heavy Snow Areas 2-5. Precautions for Installation in Heavy Snow

Areas 2-6. Dimensions of Air-Discharge Chamber 2-7. Dimensions of Outdoor Unit with

Air-Discharge Chamber (field supply) 2-8. Dimensions of Snow Ducting 2-9. Dimensions of Outdoor Unit with Snow-Proof

Ducting (field supply)

3. HOW TO INSTALL THE INDOOR UNIT . . . . . 25

 4-Way Air Discharge Semi-Concealed Type

(X 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

 1-Way Air Discharge Semi-Concealed Type

(A Type)

3-8. Suspending the Indoor Unit 3-9. Placing the Unit Inside the Ceiling 3-10. Installing the Drain Piping

Page

3-11. Checking the Drainage 3-12. Electrical Power Wiring 3-13. How to Install the Ceiling Panel

 Concealed Duct Type (U Type)

3-14. Required Minimum Space for Installation and

Service 3-15. Suspending the Indoor Unit 3-16. Installing the Drain Piping 3-17. Checking the Drainage 3-18. Increasing the Fan Speed

 Concealed Duct High-Static Pressure Type

(D Type)

3-19. Required Minimum Space for Installation and

Service 3-20. Suspending the Indoor Unit 3-21. Installing the Drain Piping 3-22. Caution for Ducting Work 3-23. Indoor Fan Performance

 Ceiling-Mounted Type (T Type)

3-24. Required Minimum Space for Installation and

Service 3-25. Suspending the Indoor Unit 3-26. Duct for Fresh Air 3-27. Shaping the Tubing 3-28. Installing the Drain Piping

 Wall-Mounted Type (K Type)

3-29. Removing the Rear Panel from the Unit 3-30. Selecting and Making a Hole 3-31. Installing the Rear Panel onto the Wall 3-32. Removing the Grille to Install the Indoor Unit 3-33. Preparing the Tubing 3-34. Shaping the Tubing 3-35. Installing the Drain Hose 3-36. When Using Wireless Remote Controller

Instead of Wired Remote Controller

4. HOW TO INSTALL THE OUTDOOR UNIT . . . 56

4-1. Installing the Outdoor Unit 4-2. Drainage Work 4-3. Routing the Tubing and Wiring

5. ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . 57

5-1. General Precautions on Wiring 5-2. Recommended Wire Length and Wire

Diameter for Power Supply System 5-3. Wiring System Diagram

Page 7

Page

6. HOW TO PROCESS TUBING . . . . . . . . . . . . 61

6-1. Connecting the Refrigerant Tubing 6-2. Connecting Tubing Between Indoor and

Outdoor Units 6-3. Insulating the Refrigerant Tubing 6-4. Taping the Tubes 6-5. Finishing the Installation

7. AIR PURGING . . . . . . . . . . . . . . . . . . . . . . . . . 65

 Air Purging with a Vacuum Pump (for Test Run)

Preparation

8. TEST RUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

8-1. Preparing for Test Run 8-2. Test Run Procedure 8-3. Outdoor Unit PCB Setting 8-4. Auto Address Setting 8-5. Caution for Pump Down 8-6. Meaning of Alarm Messages

9. APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

9-1. 4-Way Air Discharge Semi-Concealed Type

(X Type) 9-2. 1-Way Air Discharge Semi-Concealed Type

(A Type) 9-3. Concealed Duct (High-Static Pressure) Type

(U, D Type) 9-4. Ceiling-Mounted Type (T Type) 9-5. Wall-Mounted Type (K Type)

Page 8

1. GENERAL

1-3. Type of Copper Tube and Insulation Material

This booklet briefly 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. Standard screwdriver

2. Phillips head screwdriver

3. Knife or wire stripper

4. Tape measure

5. Carpenter’s level

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 – 1-7.

Table 1-1 (Outdoor Unit)

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 5. ELECTRICAL WIRING for details.

CAUTION

Check local electrical codes and regulations before obtaining wire. Also, check any specified 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

Part name

Tube Discharge Assy

Instruction manual paper

Figure

Q’ty

03652 Model

(4 hp)

hp = horsepower

06052 Model

(6 hp)

Page 9

Table 1-2 (4-Way Air Discharge Semi-Concealed)

Part Name Figure

Full-scale installation diagram

Drain hose

Hose band

Drain insulator

Flare insulator

Insulating tape

Packing

Wiring cover

Screw

Washer

Screw

White (heat-resisting)

Table 1-3 (1-Way Air Discharge Semi-Concealed)

Part Name Figure

Full-scale installation diagram

Drain ho

Hose band

Drain insulator

Flare insulator

Insulating tape

Packing

Washer

Screw

Bushing

White (heat-resisting)

Q’ty

Printed on container box

For securing drain hose

For drain joint

For liquid tube

For gas tube

For gas tube joint

For drain joint

For covering erectrical wiring

For full-scale installation diagram

For suspending indoor unit from ceiling

For fixing the wiring cover

Q’ty

Printed on container box

For securing drain hose

For drain joint

For liquid tube

For gas tube

For gas tube joint

For drain joint

For suspending indoor unit from ceiling

For full-scale installation diagram

For electrical junction box

Remarks

Table 1-4 (Concealed Duct)

Part Name Figure

Drain hose

Hose band1

Packing 1

Drain insulator 1

Flare insulator 1

Insulating tape

Flare insulator 1

Washer

Sealing putty 1

Vinyl clamp 8

 Use 3/8" for suspending bolts.  Field supply for suspending bolts and nuts.

White (heat-resisting)

Q’ty

For securing drain hose

For drain joint

For liquid tube

For gas and liquid tubes flare nuts

For gas tu

For suspending indoor unit from ceiling

For sealing recessed portion of power supply

For flare and drain insulators

Remarks

Page 10

Table 1-5 (Concealed Duct High-Static Pressure)

Part Name Figure

Washer

Nut

Flare insulator

Drain socket

Q’ty

For suspending indoor unit from ceiling

For gas tube

For liquid tube

For drain pipe connection

Remarks

Table 1-6 (Ceiling-Mounted)

Part Name Figure

Full-scale installation diagram 1

Washer 4

Flare insulator

Insulating tape 2

Vinyl clamp 8

Drain hose1

Hose band2

Drain insulator 1

Gum eyelet 1

T1/8"

T3/16"

White (heat-resisting)

L5-1/2"

Q’ty

Printed on container box

For temporarily suspending indoor unit from ceiling

For gas and liquid tube joints

For gas and liquid tubes flare nuts

For flare and drain insulators

For main unit and PVC pipe joints

For drain hose connection

For drain hose joint

For power supply inlet

Remarks

Table 1-7 (Wall-Mounted)

Tapping screw

Plastic cover

Insulator

Part Name Figure

5/32" × 1"

Q’ty

For fixing the rear panel

For improved tubing appearance

For insulating flare nut (2452 type only)

Remarks

1-5. Tubing Size

Table 1-8 Main Tubing Size (LA)

BTU/h (kW)

System horsepower

Gas tubing

Liquid tubing

38,200 (11.2)

ø5/8" (ø15.88)

ø3/8" (ø9.52)

52,900 (15.5)

ø3/4" (ø19.05)

Unit: in. (mm)

Table 1-9 Main Tubing Size After Distribution (LB, LC...)

Total capacity after distribution

Tubing size

Over BTU/h

Gas tubing

Liquid tubing

Note: In case the total capacity of connected indoor units exceeds the total capacity of the outdoor units, select the main

tubing size for the total capacity of the outdoor units.

24,200 (2.5 hp)–38,200 (4 hp) 47,800 (5 hp) 52,900 (6 hp)Below BTU/h

24,200 (2.5 hp)

ø5/8" (ø15.88)ø1/2" (ø12.7) ø3/4" (ø19.05)

ø3/8" (ø9.52) ø3/8" (ø9.52)

Unit: in. (mm) hp = horsepower

Table 1-10 Indoor Unit Tubing Connection (1, 2...

7 9 12 183624 48Indoor unit type

Gas tubing

Liquid tubing

ø1/4" (ø6.35) ø3/8" (ø9.52)

n–1

)

ø5/8" (ø15.88)ø1/2" (ø12.7)

Unit: in. (mm)

Page 11

Heat pump unit

(Single-phase)

(oz)

CHX03652

123

CHX06052

123

1-6. Straight Equivalent Length of Joints

Design the tubing system by referring to the following table for the straight equivalent length of joints.

Table 1-11 Straight Equivalent Length of Joints

Gas tubing size (in. (mm))

90° elbow

45° elbow

U-shape tube bend (R2-3/8

Trap bend

Y-branch distribution jointEquivalent length conversion not needed.

Ball valve for service Equivalent length conversion not needed.

" – 4" (60 – 100))

1/2" (12.7)

0.8

7.5

5/8" (15.88)

1.1

0.9

3.4

9.2

Unit: ft.

3/4" (19.05)

1.4

4.1

10.5

Table 1-12 Required Copper Tubing Dimensions Unit: in. (mm)

Material O

Copper tube

Outer diameter 1/4 (6.35) 3/8 (9.52) 1/2 (12.7) 5/8 (15.88) 3/4 (19.05)

Wall thickness 1/32 (0.8) 1/32 (0.8) 1/32 (0.8) 5/128 (1.0)

over 5/128 (1.0)

1-7. Additional Refrigerant Charge

Additional refrigerant charge amount is calculated from the liquid tubing total length as follows.

Table 1-13 Amount of Refrigerant Charge Per Meter, According to Liquid Tubing Size

Liquid tubing size Amount of refrigerant

(in. (mm)) charge (oz/ft.)

ø1/4" (ø6.35) 0.279

ø3/8" (ø9.52) 0.602

Required amount of charge = (Amount of refrigerant charge per meter of each size of liquid tube × its tube length) + (...) + (...)

*Always charge accurately using a scale for weighing.

Table 1-14 Refrigerant Charge Amount at Shipment (for outdoor unit)

1-8. System Limitations

Table 1-15 System Limitations

Outdoor units (Type)

Number of max. connectable indoor units

Max. allowable indoor/outdoor capacity ratio

CHX036526CHX06052

50 – 130%

Page 12

1-9. Tubing Length

Select the installation location so that the length and size of refrigerant tubing are within the allowable range shown in the figure below.

Main tube of unit

L1 L2

LCLB

1st branch

2 3

n-1

Unit distribution tube

Note: Do not use commercially available T-joints for the liquid tubing.

* Be sure to use special R410A distribution joints (APR: purchased separately) for outdoor

unit connections and tubing branches.

R410A distribution joint APR-P160BA (for indoor unit)

Table 1-16 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights

Items Marks Contents Length (ft.)

131

656

Allowable tubing length

Allowable elevation difference

L1 Max. tubing length

Actual length 492

Equivalent length 574

L (L2 – L3)

...

1, 2

+2+...

n–1

Difference between max. length and min. length from the No.1 distribution joint

Max. length of each distribution tube 98

Total max. tubing length including length of

+L1

each distribution tube (only narrow tubing)

When outdoor unit is installed higher than indoor unit 164

When outdoor unit is installed lower than indoor unit 131

H2 Max. difference between indoor units 49

L = Length, H = Height

Page 13

WARNING

Always check the gas density limit for the room in which the unit is installed.

Minimum indoor volume & floor area as against the amount of refrigerant is roughly as given in the following table.

1-10. Check of Limit Density

When installing an air conditioner in a room, it is necessary to ensure that even if the refrigerant gas accidentally leaks out, its density does not exceed the limit level for that room.

If the density could exceed the limit level, it is necessary to provide an opening between the unit and the adjacent room, or to install mechanical ventilation which is interlocked with the leak detector.

(Total refrigerant charged amount: oz)

(Min. indoor volume where the indoor unit is installed: ft.3)

Limit density 0.3 (oz/ft.3)

The limit density of refrigerant which is used in this unit is

0.3 oz/ft.3(ISO 5149).

The shipped outdoor unit comes charged with the amount of refrigerant fixed for each type, so add it to the amount that is charged in the field. (For the refrigerant charge amount at shipment, refer to the unit’s nameplate.)

CAUTION

Pay special attention to any location, such as a basement, etc., where leaking refrigerant can accumulate, since refrigerant gas is heavier than air.

ft.

10000

9500

Min. indoor volume

9000

8500 8000

7500 7000 6500 6000 5500 5000 4500 4000

3500 3000

2500 2000 1500 1000

Range below the density limit of

0.3 oz/ft. (countermeasures not needed)

500

Range above the density limit of

0.3 oz/ft. (countermeasures needed)

1000500 1500 2000 2500 3000

Total amount of refrigerant

ft.

1136 1079 1022 966 909 852 795 738 682 625 568 511 454

398 341

284 227 170 114 57

Min. indoor floor area

(when the ceiling is 8.8 ft. high)

Tube branching methods (horizontal use)

15 to 30°

Arrow view

Horizontal line

View as seen from arrow

1-11. Installing Distribution Joint

(1) Refer to “HOW TO ATTACH DISTRIBUTION JOINT”

enclosed with the optional distribution joint kit (APR-P160BA).

(2) In order to prevent accumulation of refrigerant oil in

stopped units, if the main tubing is horizontal then each branch tubing length should be at an angle that is greater than horizontal. If the main tubing is vertical, provide a raised starting portion for each branch.

(3) If there are height differences between indoor units or if

branch tubing that follows a distribution joint is connected to only 1 unit, a trap or ball valve must be added to that distribution joint. (When adding the ball valve, locate it within 1.3 ft. of the distribution joint.) (Consult with SANYO separately concerning the ball valve.)

If a trap or ball valve is not added, do not operate the system before repairs to a malfunctioning unit are completed. (The refrigerant oil sent through the tubing to the malfunctioning unit will accumulate and may damage the compressor.)

Types of vertical trap specifications

(When using ball valve)

Main tubing

Ball valve

(BV: purchased

separately)

Indoor unit (1)

(When not using ball valve)

Main tubing

Indoor unit is directed downward

Indoor unit (more than 2 units) (If only 1 unit is connected, a ball valve is also needed on this side.)

Branch tubing is directed upward.

More than 8 in.

Horizontal

Indoor unit

(Each unit is connected to tubing that is either level or is directed downward.)

Page 14

1-12. Optional Distribution Joint Kit

See the installation instructions packaged with the distribution joint kit for the installation procedure.

Table 1-17

Model name Cooling capacity after distribution Remarks

APR-P160BA 76,400 BTU/h (22.4 kW) or less For indoor unit

APR-P160BA Use: For indoor unit (Capacity after distribution joint is 76,400 BTU/h (22.4 kW) or less.)

Example

Gas tube Liquid tube

Distribution Joint

4-21/64

3-13/16

2-53/64

Distribution Joint

4-21/64

3-13/16

D E

2-53/64

Insulation

Unit: in.

Table 1-18 Size of connection point on each part (Shown are inside diameters of tubing)

Size Part A Part B Part C Part D Part E

in. (mm)

ø3/4" ø5/8" ø1/2" ø3/8" ø1/4"

(ø19.05) (ø15.88) (ø12.7) (ø9.52) (ø6.35)

Page 15

1-13. Example of Tubing Size Selection and Refrigerant Charge Amount

Additional refrigerant charging

Based on the values in Tables 1-2, 1-3, 1-4 and 1-7, use the liquid tubing size and length, and calculate the amount of additional refrigerant charge using the formula below.

Required additional refrigerant charge (oz)

= 0.602 × (a) + 0.279 × (b)

(a): Liquid tubing Total length of ø3/8" (ft.) (b): Liquid tubing Total length of ø1/4" (ft.)

 Charging procedure

Be sure to charge with R410A refrigerant in liquid form.

1. After performing a vacuum, charge with refrigerant from the liquid tubing side. At this time, all valves must be in the “fully closed” position.

2. If it was not possible to charge the designated amount, operate the system in Cooling mode while charging with refrigerant from the gas tubing side. (This is performed at the time of the test run. For this, all valves must be in the “fully open” position.) Charge with R410A refrigerant in liquid form. With R410A refrigerant, charge while adjusting the amount being fed a little at a time in order to prevent liquid refrigerant from backing up.

 After charging is completed, turn all valves to the “fully open” position.

 Replace the tubing covers as they were before.

Tightening torque for valve stem cap: 160 – 180 lbs · in.

Tightening torque: 300 – 360 lbs

CAUTION

1. R410A additional charging absolutely must be done through liquid charging.

2. The R410A refrigerant cylinder has a gray base color, and the top part is pink.

3. The R410A refrigerant cylinder includes a siphon tube. Check that the siphon tube is present. (This is indicated on the label at the top of the cylinder.)

4. Due to differences in the refrigerant, pressure, and refrigerant oil involved in installation, it is not possible in some cases to use the same tools for R22 and for R410A.

in.

Tightening torque: 590 – 710 lbs

Tightening torque for valve stem cap: 240 – 280 lbs

in.

Page 16

Example:

Main tube of unit

L1 L2

LCLB

1st branch

Unit distribution tube

2 3

n–1

model 0752 model 0952 model 1252 model 1852

 Example of each tubing length

Main tubing Distribution joint tubing

LA = 131 ft. Indoor side LB = 16 ft. 1 = 16 ft. 4 = 20 ft. LC = 16 ft. 2 = 16 ft. 5 = 16 ft. LD = 49 ft. 3 = 7 ft.

 Obtain charge amount for each tubing size

Note that the charge amounts per 3.3 ft. are different for each liquid tubing size. ø3/8" (ø9.52) → LA + LB + LC + LD : 212 ft. × 0.602 oz/ft. = 127 oz ø1/4" (ø6.35) → 1 + 2 + 3 + 4 + 5 : 75 ft. × 0.279 oz/ft. = 20 oz

Total 147 oz

Additional refrigerant charge amount is 147 oz.

model 1852

CAUTION

Be sure to check the limit density for the room in which the indoor unit is installed.

Checking of limit density

Density limit is determined on the basis of the size of a room using an indoor unit of minimum capacity. For instance, when an indoor unit is used in a room (floor area

× ceiling height 8.8 ft. = room volume 704 ft.3), the

80 ft graph at right shows that the minimum room volume should be 497 ft.

(floor area 56 ft.2) for refrigerant of 147 oz. Accordingly, openings such as louvers are required for this room.

Overall refrigerant charge amount for the air conditioner: oz

(Minimum room volume for indoor unit: ft.3)

147 (oz) + 123 (oz)

704 (ft.

)

= 0.38 (oz/ft.

) > 0.3 (oz/ft.3)

Therefore, openings such as louvers are required for this room.

ft.

4000

Range below the density limit of

0.3 oz/ft. (countermeasures not needed)

500

Range above the density limit of

0.3 oz/ft. (countermeasures needed)

400200 600 800 1000 1200

Total amount of refrigerant

Min. indoor volume

3500

3000

2500

2000

1500

1000

454

398

341

284

227

170

114

ft.

Min. indoor floor area

(when the ceiling is 8.8 ft. high)

Page 17

2. SELECTING THE INSTALLATION SITE

Ceiling-Mounted Type

2-1. Indoor Unit

AVOID:

 areas where leakage of flammable 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 flow 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 Table 1-16.

 allow room for mounting the remote controller about

3 ft. off the floor, in an area that is not in direct sunlight nor in the flow of cool air from the indoor unit.

NOTE

Ceiling

Wall

min. 10 in.

Front view

min. 10 in.

NOTE

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

Air discharge

min. 2 ft.

Side view

Air intake

Max. 10 in.

Obstacle

Fig. 2-1

Concealed Duct (High-Static Pressure) Type 4-Way Air Discharge Semi-Concealed Type

3 ft.

Fig. 2-2

1-Way Air Discharge Semi-Concealed Type

Ceiling

Air

min. 3 ft.

Obstacle

min. 2 in.

discharge

Wall

Air intake

min. 2 in.

Side view

Fig. 2-3

Wall

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

Wall-Mounted Type

min. 6 in.

Front View

Fig. 2-4

min. 6 in.

Page 18

2-2. Outdoor Unit

AVOID:

 heat sources, exhaust fans, etc. (Fig. 2-5)

 damp, humid or uneven locations

DO:

 choose a place as cool as possible.

 choose a place that is well ventilated and outside

air temperature does not exceed maximum 113°F constantly.

 allow enough room around the unit for air intake/

exhaust and possible maintenance. (Fig. 2-6)

 use lug bolts or equal to bolt down unit, reducing

vibration and noise.

Installation space

Distance between obstructions and the unit air inlet and outlet must be as shown below.

Inlet side C

More than 25/64" More than 25/64"

Outlet side More than

3.3 ft.

Fig. 2-6

Air direction chamber

(field supply)

Hot air

Exhaust fan

Heat source

Outdoor unit

Fig. 2-5

(Obstruction above unit)

Inlet side More than 8 in.

(Obstruction on inlet side)

(Ground)

Fig. 2-7

CAUTION

 Concerning inlet-side distance “C” (Fig. 2-6)

The minimum for distance “C” is 6 in. if there are no obstructions on the outlet side (wall *1 side) and *2 or *4 is not present. In all other cases, the minimum for distance “C” is 8 in.

 If the unit is installed with the outlet side facing wall *1, then there must be no obstruc-

tions on 2 of the remaining 3 sides: *2, *3, *4.

 If wall *1 is on the outlet side (Fig. 2-6), or if obstructions are present on all 3 sides *2,

*3, and *4 (Fig. 2-6), then the minimum distance for “A” and “B” is 6.6 ft. (Fig. 2-8). Even if there is no wall on the outlet side, a minimum of 3.3 ft. is required.

In case of multiple installations

 provide a solid base (concrete block, 4 × 16 in.

beams or equal), a minimum of 6 in. above ground level to reduce humidity and protect the unit against possible water damage and decreased service life. (Fig. 2-8)

 use lug bolts or equal to bolt down unit, reducing

vibration and noise.

Anchor bolts (4 pieces)

Fig. 2-8

Page 19

2-3. Air Discharge Chamber for Top Discharge

Be sure to install an air discharge chamber (field supply) in the field when:

 it is difficult to keep a space of min. 20 in. between

the air discharge outlet and an obstacle.

 the air discharge outlet is facing a sidewalk and

discharged hot air may annoy passers-by. Refer to Fig. 2-10.

2-4. Installing the Unit in Heavy Snow Areas

In locations with strong wind, snow-proof ducting (field supply) should be fitted and direct exposure to the wind should be avoided as much as possible.

 Countermeasures against snow and wind

In regions with snow and strong wind, the following problems may occur when the outdoor unit is not provided with a platform and snow-proof ducting:

a) The outdoor fan may not run and damage to the

unit may occur. b) There may be no air flow. c) The tubing may freeze and burst. d) The condenser pressure may drop because of

strong wind, and the indoor unit may freeze.

Air discharge

Fig. 2-10

In regions with significant snowfall, the outdoor unit should be provided with a platform and snow-proof ducting.

2-5. Precautions for Installation in Heavy Snow

Areas

(1) The platform should be higher than the max. snow

depth. (Fig. 2-11)

(2) The 2 anchoring feet of the outdoor unit should be

used for the platform, and the platform should be installed beneath the air intake side of outdoor unit.

(3) The platform foundation must be firm and the unit

must be secured with anchor bolts.

(4) In case of installation on a roof subject to strong

wind, countermeasures must be taken to prevent the unit from being blown over.

Without snowproof ducting (Low platform)

Fig. 2-11

Outdoor Unit

Duct

With snowproof ducting (High platform)

Air Intake

Fig. 2-12

Page 20

9-7/161-1/8

1-1/8

1-3/821-5/3212-15/32

2-3/4

Rectangular hole

11-13/16

9-7/16

1-3/8

12-15/3221-5/32

2-3/4

21-13/3211

22-13/32

42-29/32

39-1/4

9-27/32

12-7/329-27/32

2-6. Dimensions of Air-Discharge Chamber Reference diagram for air-discharge chamber (field supply) CHX03652/06052

1 Unit front, air discharge chamber

2 Unit left side, air discharge chamber

3 Unit light side, air discharge chamber

4 Reinforcement brackets, 4 locations

2-7. Dimensions of Outdoor Unit with Air-Discharge Chamber (field supply) CHX03652/06052

11-13/16

Wind direction

4-5/16

1/2

25/3225/32

14-31/3213/3219/32

15-15/16

4-1/439-1/4

25-31/326-11/16

Wind direction

1/2 1/2

Wind

direction

13-3/8

2-11/36 21-13/32

Wind direction

48-7/16

Wind direction

23/32

Unit: in.

11-13/16

Wind direction

Unit: in.

Page 21

Reference for air-discharge chamber (field supply) Required space around outdoor unit CHX03652/06052

If an air discharge chamber is used, the space shown below must be secured around the outdoor unit. If the unit is used without the required space, a protective device may activate, preventing the unit from operating.

(1) Single-unit installation

Min. 7-7/8

Min. 39-3/8

Unit: in.

The top and both sides must remain open.

CAUTION

If there are obstacles to the front and rear of the outdoor unit, the obstacle at either the front or rear must be no taller than the height of the outdoor unit.

(2) Multiple-unit installation

Installation in lateral rows



More than 11-13/16

More than 7-7/8

CAUTION

Installation in front-rear rows



intakes or outlets facing outlets

More than 59-1/16

More than 11-13/16

Unit: in.

More than 15-3/4

The front and top must remain open. The obstacles must be no taller than the height of the outdoor unit.

Installation with intakes facing outletsInstallation with intakes facing

More than 15-3/4

More than 78-3/4

CAUTION

Unit: in.

The front and both sides must remain open.

Page 22

2-8. Dimensions of Snow Ducting Reference diagram for snow-proof ducting (field supply) CHX03652/06052

Fastened by screws at 13 locations

1 Unit top, snow-proof vent

2 Unit left side

3 Unit right side

4 Unit reverse side

30-3/32

9-3/16

28-13/16

47-19/32

Fastened by screws at 3 locations (also on reverse side)

Fastened by screw at 1 location (also on reverse side)

25-13/32

17-15/32

15-9/32

3-3/4 19-11/16

5-29/32

25/32

17-23/3219-11/16

Unit anchor hole

(7 – ø9/32 hole)

1-5/8 28-3/4

30-5/8

2-9. Dimensions of Outdoor Unit with Snow-Proof Ducting (field supply) CHX03652/06052

13-5/1619-11/16

5/8

3-31/32

Unit: in.

11-7/8

1-3/16

9-3/16

28-13/16

47-19/32

48-7/16

25-13/32

47-19/32

Wind direction

24-7/8

30-3/32

Wind direction

7-1/16

Wind direction

25/3225/32

14-31/3213/3219/32

15-15/16

Wind direction

Unit: in.

11-29/32

28-13/16

Wind direction

Page 23

Reference diagram for snow-proof ducting – 1

Space requirements for setting – (1) CHX03652/06052

[Obstacle to the rear of unit]



Top is open:

(1) Single-unit installation

(2) Obstacles on both sides

Min. A

Min. B

(3) Multiple-unit installation (2 or more units)

Min. E

Min. E M in. E

Min. C

[Obstacle to the front of unit]



Top i s open:

(1) Single-unit installation

Min. D

(2) Multiple-unit installation (2 or more units)

Min. I Min. I

Min. G

Outdoor unit

CHX03652/06052

19-11/16 11-13/16 39-3/8

Min. H

Min. J

HIJ

Min. F

Outdoor unit

CHX03652/06052

AB DCEFG

5-29/32 5-29/32 7-7/8

11-13/16 11-13/16

5-29/32 7-7/8

Note: In cases 2 and 3 the height of the obstacle must be no taller than the height of the outdoor unit.



Top is blocked by an obstacle:

Min. L

Min. K

Outdoor unit

CHX03652/06052

19-11/16

5-29/32



Top i s blocked by an obstacle:

Min. M

Outdoor unit

CHX03652/06052

39-3/8

Min. N

Unit: in.

Page 24

Reference diagram for snow-proof ducting – 2

Space requirements for setting – (2) CHX03652/06052

[Obstacles to the front and rear of unit]



The top and both sides must remain open. Either the obstacle to the front or the obstacle to the rear must be no taller than the height of the outdoor unit.

(1) Single-unit installation

Min. P

Dimension Q If a snow protection duct is attached after the unit is

installed, verify that dimension Q is 19-11/16 in. or more.

Min. O

Outdoor unit

CHX03652/06052

39-3/8

5-29/32

(2) Obstacles on both sides

Min. 11-13/16

Min. 7-7/8

Min. 39-3/8

[Installation in front-rear rows]



The top and both sides must remain open. Either the obstacle to the front or the obstacle to the rear must be no taller than the height of the outdoor unit.

Min. 11-13/16

Min. 39-3/8 Min. 7-7/8

Min. 59-1/16 Min. 7 8-3/4

Dimension Q If a snow protection duct is

attached after the unit is installed, verify that dimension Q is 19-11/16 in. or more.

Unit: in.

Page 25

3. HOW TO INSTALL THE INDOOR UNIT

 4-Way Air Discharge Semi-Concealed Type (X Type)

3-1. Preparation for Suspending

This unit uses a drain pump. Use a carpenter’s level 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.

34-27/32

(885)

Unit: in. (mm)

34-27/32

(885)

Table 3-1

Type

Length

12, 18, 24, 36

ABCD

31-1/32

(788)

28-15/32

(723)

(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 fitting, unit, and panel.

8-17/64

(210)

8-17/64

(210)

Unit: in. (mm)

3-15/32

(88)

3-15/32

(88)

Table 3-2

Type

Length

12, 18, 24

ABCD

4-29/64

(113)

4-29/64

(113)

6-13/16

(173)

6-13/16

(173)

10-5/64

(256)

12-9/16

(319)

Note: For DC Fan Tap Change Procedure

for 4-Way Cassette, see page 31.

Hole-in-anchor Hole-in-plug

Concrete Insert

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

Fig. 3-1

B (suspension bolt pitch)

A (suspension bolt pitch)

C (ceiling opening dimension)

Fig. 3-2

D (ceiling opening dimension)

Drain outlet(other side)

(VP25)

Suspension lug

Refregerant tubing joint(liquid side) Refregerant tubing joint(gas side)

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 full-scale 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.

Fig. 3-3

Over 19/32 (15)

Supplied bolt

Power supply outlet

Inter-unit control wiring

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

Fig. 3-4

1-3/8 (35)

Unit: in. (mm)

15/32 – 43/64

(12 – 17)

Unit: in. (mm)

Page 26

(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 in. as shown in Fig. 3-5.

Nuts and washers (use for upper and lower)

Suspension bolt

Suspension lug

(3) Thread the 3 hexagonal nuts and 2 washers (field

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 in. 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 in.) 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)

CAUTION

 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 firmly. Please make sure that the bead is not covered by the hose band. (Fig. 3-6)

Double nut

Connection pipe

(drain port)

Align the hose band with the end of the pipe

15/32 – 43/64 (12 – 17)

Fig. 3-5

Hose band

Bead

Supplied drain hose

Fig. 3-6

Drain insulator (supplied)

Fig. 3-7

Air bleeder prohibited

Hard PVC socket

VP-25

(Field supply)

Packing

(supplied)

Notch

Unit: in.

Hard PVC pipe VP-25

(Field supply)

PVC adhesive

CAUTION

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)

NOTE

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

CAUTION

Fig. 3-8

 Do not install an air bleeder

as this may cause water to spray from the drain pipe outlet. (Fig. 3-8)

Page 27

CAUTION

 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 flow 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.

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.

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

33-15/32 in. or less

0 – 45°

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

Fig. 3-9

Upward gradient prohibited

Fig. 3-10

Support pieces

Fig. 3-11

Drainage check

(2) Slowly pour about 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 flow 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.

CAUTION

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

Over 3-15/16 in.

Plastic container

for water intake

Drain pan outlet

Water (Approx. 0.3 gal)

Fig. 3-12

Page 28

3-6. How to Install the Ceiling Panel

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, flap operation failure, or other problems may result.

must be within the range of 15/32 – 43/64 in.

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

Main unit

Ceiling side

Ceiling opening dimension

Fig. 3-13

CAUTION

 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 flap or apply force to it.

(This may cause flap malfunction.)

Remove the air-intake grille and air filter from the ceiling panel. (Figs. 3-16, 3-17 and 3-18)

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

grille. (Fig. 3-16)

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

shown by the arrows to open the grille.

(Fig. 3-17)

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 . (Fig. 3-18)

Air-intake grille

Latch

Ceiling panel

Flap

Fig. 3-14

Screw

Fig. 3-15

Removing the corner cover

a) Slide the corner cover to the direction shown

by the arrow to remove the corner cover.

(Fig. 3-18).

Corner cover

Air-intake grille hinge

Push

Fig. 3-18

Fig. 3-16

Corner cover

Fig. 3-17

Ceiling panel

Strap

Page 29

3-6-2. Installing the Ceiling Panel

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 flap angle. (Do not attempt to move the flap by hand. Doing so may damage the flap.)

(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 fine 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"

Wiring cover (supplied) Power supply outlet

Fig. 3-19-1 Fig. 3-19-2

Square hole in unit

Push when you remove

Temporary fastener

Fig. 3-20-1

Drain tubing corner

Celling panel

REF,PIPE

Washer head screws

mark

Fig. 3-20-2

Inter-unit control wiring

Temporary fastener

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

Panel installation hole (4 locations)

CAUTION

 If the screws are not sufficiently tight-

ened, trouble such as that shown in the figure below may occur. Be sure to tighten the screws securely.

Air leakage

Air leakage from ceiling surface

Staining

Condensation, water leakage

Main unit

Ceiling surface

 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.

Fig. 3-23

Do not allow

gaps

Ceiling panel

Fig. 3-21

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.

Fig. 3-22

Insert a wrench or other tool into the corner cover installation hole and make fine adjustments to the unit nut.

Page 30

3-6-3. Wiring the Ceiling Panel

(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.

 If the connectors are not connected, the Auto flap 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 figure.

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

to the ceiling panel.

(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 fi

ure.

wiring connector

Fig. 3-24

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.

 When attaching the air-intake grille, be careful

that the flap 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 figure 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 figure below. However, the optional wireless receiver kit can only be installed at the refrigerant-tubing corner of the ceiling unit.

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.

Unit drain hose side

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

Unit refrigerant tube side

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

Unit electrical component box

Can be installed rotated 90˚

Fig. 3-27

Page 31

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 flap 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 filter, 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 flow 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 flow.

3-7. Special Remarks

DC Fan Tap Change Procedure

<Steps> Be sure to turn OFF the power (at mains) before beginning the work below. (1) In the table below, check the field-supply parts that will be used. (If this setting is not made, the airflow may

decrease and condensation may occur.)

(2) Setting (a)

Open the cover of the electrical component box.

Setting

(a)

(b)

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

Air shield material (for use with 3-direction discharge)*

Air shield material (for use when a discharge duct is connected)*

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

Indoor unit control PCB

* Use field-supply air shield material.

* PCB model No.: CR-SXRP56B-B

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

(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

Page 32

 1-Way Air Discharge Semi-Concealed Type (A Type)

3-8. Suspending the Indoor Unit

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

(Figs. 3-29 and 3-30)

(2) Depending on the ceiling type:

 Insert suspension bolts as shown in Fig. 3-31

 Use existing ceiling supports or construct a suitable

support as shown in Fig. 3-32.

 Make sure that the length of suspension bolts from the

bottom of the unit is 19/32 in. or more. (Fig. 3-33)

29-59/64 (Panel outer dimensions) 28-47/64 (Ceiling opening dimension)

1-27/64

25-63/64 (Suspension bolt pitch)

22-3/64

23-5/8

Fig. 3-29

(1-27/64)

15-3/4 (Suspension bolt pitch)

3-47/64

Unit: in.

19/32

23-15/64 (Ceiling opening dimension)

24-13/32 (Outline dimension of panel)

19/32

WARNING

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-

size installation diagram (printed on the package). The relationship between the positions of the suspension lugs, unit, and ceiling panel is as shown in Fig. 3-30.

(4) Cut the ceiling material, if necessary.

(Figs. 3-29 and 3-30) 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 in Figs. 3-34 and

3-35.

CAUTION

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

Inter-unit Control Wiring

Power supply outlet

Fig. 3-30

Concrete

Suspension bolt

(M10 or 3/8")

Insert

12-19/64

1-3/16

Unit: in.

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

Fig. 3-31

Page 33

3-9. Placing the Unit Inside the Ceiling

Ceiling tiles

Ceiling support

CAUTION

Be sure to use a level gauge and confirm 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-size installation diagram to the indoor unit suspension lugs, in order to obtain the ceiling opening dimensions for suspending the unit.

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 (field

supply) to the suspension bolts (4 locations).

CAUTION

 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 in. below the bottom of the suspension lugs, as shown in Fig. 3-33. 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 (field

supply) onto each of the 4 suspension bolts as

shown in Fig. 3-36. 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.

Suspension

lug

25/32 – 1 in.

For fresh air intake (ø3-15/16 hole)

6-11/16

Fig. 3-32

Full-scale installation diagram

over 19/32 in.

Fig. 3-33

Fig. 3-34

For fresh air intake (ø3-15/16 hole)

3-5/32

6-11/16

Unit: in.

(4) Lift up the indoor unit and fit 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 in. Then tighten the

nuts above and below each suspension lug. The

full-size installation diagram can be used to help

adjust the height of the indoor unit.

8-1/16

Nuts and washers (Used above and below.)

Double nuts

over 19/32 in.

Unit: in.

Fig. 3-35

Suspension bolt

Suspension lug

Notch

25/32 – 1 in.

Fig. 3-36

Page 34

CAUTION

2-1/8

19/32

2-1/8

 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

flange of the unit should follow the dimensions given

in Figs. 3-37 and 3-38.

3-10. 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. 3-39)

CAUTION

 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 figure at right, then secure it tightly with the hose band.

 Tighten the hose clamps so their locking nuts face

upward. (Fig. 3-39)

 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).

Suspension bolts

Tubing side

Suspension bolts

19/32

Fig. 3-37

25/32

Fig. 3-38

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

Drainage check section on drain port (transparent)

Bead

Drain hose (supplied)

Fig. 3-39

Drain insulator (supplied)

Ceiling material

25/32

Hard PVC

socket VP-25

(not supplied)

Packing (supplied)

Unit: in.

Hard PVC pipe

VP-25

(not supplied)

PVC adhesive

(2) After checking the drainage, wrap the supplied

packing and drain pipe insulator around the pipe,

then secure it with the supplied clamps. (Fig. 3-40)

NOTE

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

Fig. 3-40

Page 35

CAUTION

 Do not install an air bleeder as this may cause water

to spray from the drain pipe outlet. (Fig. 3-41)

 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. 3-42)

 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 flow backward and leak when the unit is not operating. (Fig. 3-43)

 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. 3-44)

 Provide insulation for any pipes that are run indoors.

3-11. 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.

Air bleed valve

Fig. 3-41

11-13/16 in. or less

33-15/32 in. or less

0 – 45°

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

Fig. 3-42

Uphill slope

Fig. 3-43

Support

bracket

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

terminals) inside the electrical component box.

(2) Pour about 0.2 gal of water into the drain pan using a

siphon pump through the air outlet grille. (Fig. 3-45)

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

and operate the drain pump. Check the water flow

through the transparent drain pipe and see if there is any

leakage.

CAUTION

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.

CAUTION

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. 3-44

Drainage check

Drain tube connection (transparent)

Discharge port

water (0.2 gal)

Fig. 3-45

Page 36

3-12. Electrical Power Wiring

(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. 3-46)

(2) 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

 Route the power wiring into the indoor unit through the power inlet on the side of the unit. At this time, be

WARNING

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 fire.

 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.

3-13. How to Install the Ceiling Panel

Component Parts

Part name Quantity Appearance Part name Quantity Appearance

Ceiling panel

3-13-1. Before Installing the Ceiling Panel

Checking the position of the indoor unit

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

the following:

Washer-head

screw

Screw

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.

Fig. 3-46

ø11/16

4 × 12 or 5/32" × 15/32"

For fastening side panel

M5 × 40 or 5/16" × 9/16"

28-47/64" × 23-17/64"

* For details, refer to the installation manual that was

supplied with the indoor unit.

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

indoor unit are as shown in Fig. 3-47. If the positions

of the ceiling surface and indoor unit are not correct,

problems such as air leakage, water leakage, and flap

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 flap.

(Doing so may damage the flap.)

25/32 – 1 in.

Ceiling surface

Indoor unit

Ceiling opening dimension

Fig. 3-47

Flap

Fig. 3-48

Page 37

Removing the intake grille

Slide the intake grille hooks (2 locations) in the direction of the arrow to open the intake grille. (fig. 3-49a)

When the intake grille is open, press a flathead screwdriver against the rear tabs (2 locations) and pull out the intake grille. (Fig. 3-49b)

Fig. 3-49a

Slide

Screw

Hook

Removing the side panel

Grasp the finger grip on the side panel and slide the panel in the direction of arrow to remove the panel. (There are 2 panels: 1 each on the left and right sides.) (Fig. 3-51)

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

Ta b

Slide

Side panel

Fig. 3-51

Hinge

Fig. 3-49b

Fig. 3-50

Intake grille

3-13-2. 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. 3-52)

(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. 3-53)

Stationary hook

Fig. 3-52

Hook receiver

Moveable hook

Press to remove.

Fig. 3-53

Page 38

CAUTION

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

bolt 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. 3-54)

(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. 3-55)

Indoor unit

 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. 3-56)

 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.

Must be no gap.

Indoor unit

Ceiling surface

Ceiling panel

Fig. 3-55

Ceiling panel

Washer-head screw

Fig. 3-54

Insert a wrench or other standard tool into the side

panel installation holes and make fine adjustments to the indoor unit nuts.

Fig. 3-56

• 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

• 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. 3-56)

Adjust so that there is no gap.

Page 39

3-13-3. Wiring the ceiling panel

(1) Loosen the 2 screws on the electrical component

box lid, and remove the lid. (Fig. 3-57)

(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. 3-58)

 If the connector is not connected, “P09” is displayed

on the remote controller, and the automatic flap 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.

3-13-4. Installing the side panel and intake grille

A. Installing the side panel

(1) Grasp the side panel finger grip and slide the panel

in the direction of the arrow to install the side panel. (Fig. 3-59)

(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. 3-60)

 When installing the intake grille, be careful that the

flap lead wire does not become pinched. (Fig. 3-60)

Screw

Electrical compornent box

Indoor unit connector

Ta bs

Fig. 3-57

Fig. 3-58

Electrical compornent box cover

Inter-unit control wiring

Power supply outlet

Fasten with screws

(4 × 12 or 5/32" × 15/32")

3-13-5. Other

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 condensa-

tion may occur.

 Check that the wiring connections are secure.

* If the wiring is not connected, the automatic flap 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.

Ta b

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 × 12 or 5/32" × 15/32").

Fig. 3-59

Screw

39U40

Fig. 3-60

Page 40

 Concealed Duct Type (U Type)

3-14. 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. 3-61 and Table 3-3.

 It is recommended that space is provided (17-23/32 × 17-23/32 in.)

for checking and servicing the electrical system.

 Fig. 3-62 and Table 3-4 show the detailed dimensions of the indoor

unit.

Table 3-3

Type

A (Length)

Number of duct flanges

7, 12, 18

30-23/32 (780)

42-17/32 (1,080)

Unit: in. (mm)

61-13/32 (1,560)

Table 3-4

Dimension

Type

7, 12, 18

ABCDEFGH I JK

26-1/16

37-7/8

56-25/32

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 26-25/3228-5/327-3/32–13-3/88 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 61-13/3213-3/16 12-7/32 57-15/3258-27/32 5-1/8

A (Suspension bolt pitch)

min. 9-27/32

22-27/32

Air outlet duct flange

Indoor unit

Fig. 3-61

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

9-27/3212 16

9-7/16 16 18

3-17/32

7-9/32

2-5/322-5/32

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

22-27/3231/32

(Suspension bolt pitch)

L-ø1/4

(Hole)

EEEF

A (O.D.)

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

(Suspension bolt pitch)

Refrigerant tubing joint (liquid tube)

13/32

IJJK

3/43/4

4-ø15/32 (Hole)

18-ø1/8

(Hole)

Inspection access

1-9/16

(5-29/32)

2-15/16 2-9/16

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-ø1-3/16 hole) Fresh air intake port (ø5-29/32 hole) Flange for the flexible air outlet duct (ø7-7/8 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

13/32

(17-23/32

17-23/32)

(Field supply)

4-17/32

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

Fig. 3-62

Unit: in.

Page 41

3-15. Suspending the Indoor Unit

Depending on the ceiling type:

• Insert suspension bolts as shown in Fig. 3-63

• Use existing ceiling supports or construct a suitable support as shown in Fig. 3-64.

WARNING

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. 3-61 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. 3-63. (Cut the ceiling material, if necessary.)

Hole-in-anchor Hole-in-plug

Nuts and washers (use for upper and lower)

Concrete Insert

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

Fig. 3-63

Ceiling tiles

Ceiling support

Fig. 3-64

Suspension bolt

Suspension lug

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

each of the 4 suspension bolts as shown in Figs. 3-65 and 3-66. 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.

 Fig. 3-67 shows an example of installation.

Air outlet duct

Air-outlet grille

Ceiling material Indoor unit

Bolt anchor

Suspension bolt

Double nuts

Suspension bolt

Hexagonal nut

Air-intake duct

Notch

Fig. 3-65

Double nuts

Fig. 3-66

Fig. 3-67

Air-intake grille

Page 42

3-16. Installing the Drain Piping

(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. 3-68)

CAUTION

 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 figure 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. 3-68)

(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. 3-69)

NOTE

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

Drainage check section on drain port (transparent)

Bead

Drain hose

(supplied)

Fig. 3-68

Drain insulator (supplied)

Vinyl clamps

Fig. 3-69

Air bleeder

Hard PVC

socket VP-25

(not supplied)

Packing (supplied)

Hard PVC pipe

VP-25

(not supplied)

PVC adhesive

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

CAUTION

 Do not install an air bleeder as this may

cause water to spray from the drain pipe outlet. (Fig. 3-70)

 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. 3-71)

 Do not install the pipe with an upward gradient from the connec-

tion port. This will cause the drain water to flow backward and leak when the unit is not operating. (Fig. 3-72)

 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. 3-73)

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.

Prohibited

Good

Prohibited

Fig. 3-70

11-13/16" or less

19-11/16" or less

Fig. 3-71

Upward gradient

Fig. 3-72

Support pieces

(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

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

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

ate the drain pump. Check the water flow through the transparent drain port and see if there is any leakage.

Fig. 3-73

Page 43

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)

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

3-18. Increasing the Fan Speed

If external static pressure is too great (due to long extension of ducts, for example), the air flow 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.

Power supply outlet

Inter-unit control wiring

(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. 3-75.

(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. 3-75

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 curves for “HT,” “H,” “M” and “L” fan speed control are shown. The nameplate values are shown based on the “H” air flow. For the 24 type, the air flow 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 flow volume may drop too low at each air outlet. This problem may be solved by increasing the fan speed as explained above.

Indoor Fan Performance

(in.WG)

0.60

0.40

Limit line

353

706

External Static Pressure

(in.WG)

0.60

0.40

0.20

External Static Pressure

Limit li

0.20

177

Air Flow (CFM)

24 Type

Limit line

353

Air Flow (CFM)

Fig. 3-74

(in.WG)

0.60

0.40

0.20

External Static Pressure

(in.WG)

0.60

0.40

0.20

External Static Pressure

Limit li

Air Flow (CFM)

Limit li

Air Flow (CFM)

18 Type7, 12 Type

530353

36 Type

1059706

NOTE

HT: Using the booster cable

H: At shipment

Fig. 3-76

Page 44

 Concealed Duct High-Static Pressure Type (D Type)

3-19. 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. 3-77.

 It is recommended that space be provided (23-5/8" ×

23-5/8") for checking and servicing the electrical system.

 Fig. 3-78 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

box

Fig. 3-77

Min. 23-5/8

(Space for service)

Air suction side

Refrigerant tubing

Min. 23-5/8

Space for

service

Min. 22-53/64

Min. 5-1/8

Unit: in.

Table 3-5

Length

Type

16-17/32

17-23/32

12-13/64

31-7/32

7 × 3-15/16 = 27-9/16

22 - ø1/8 (Hole for full circumference)

5-1/8

2-5/32

1-37/64

1-57/64

25/32

3-35/64

2-23/64

Unit: in.

15-35/64

16-47/64

2-5/322-5/32

2-43/64

3-55/64

16 - ø1/8 (Hole for full circumference)

24-13/32

19-11/16 2-3/4

25/6425/64

(Suspension bolt pitch)

3-5/32 11-27/64

19/32

1-3/8 1-3/8

1-31/32

2-5/32

11-13/16

1-13/16

19-11/16

(Suspension bolt pitch)

38-37/64

39-49/64

4 × 3-15/16 = 15-3/4

Electrical component box

4-ø25/32 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

3-55/64

1-11/32

3-15/16

Drain pan

Unit: in.

Fig. 3-78

Page 45

3-20. Suspending the Indoor Unit

Depending on the ceiling type:

 Insert suspension bolts as shown in Fig. 3-79

 Use existing ceiling supports or construct a suitable support as

shown in Fig. 3-80.

WARNING

It is important that you use extreme care in supporting the indoor unit inside the ceiling. Ensure that the ceiling is strong enough to suport 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 given previously. (Figs. 3-77 and 3-78)

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. 3-79. (Cut the ceiling material, if necessary.)

Hole-in-anchor Hole-in-plug

Hexagonal nuts and washers

(2 sets)

Concrete Insert

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

Fig. 3-79

Ceiling tiles

Ceiling support

Fig. 3-80

Suspension bolt

(3) Suspend and fix the indoor unit using the 2 hexagonal nuts

(field supply) and special washers (supplied with the unit) as shown in Fig. 3-81.

Air-outlet grille

Fig. 3-82

25/32" – 1-31/32"

Fig. 3-81

Air-intake grille

Page 46

3-21. 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, first wrap the drain port threads with sealing tape, then connect the joint. (Fig. 3-83)

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

(field supply) around the pipe.

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

or more) and prepare traps as indicated in Fig. 3-84.

(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. 3-85)

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

the drain pan to check that the water drains smoothly.

3-22. 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 flow volume as air flow volume / air flow noise increases.

 If the air conditioner is to be installed in a room such as

an office or meeting room which needs a low sound level, provide a supply and return noise absorption chamber with an acoustic liner.

 Include an air filter (field supply) at the return duct.

Drain pan

Drain opening (25A or 1-11/32

Fig. 3-83

Good

Not good

Fig. 3-84

Sealing tape

" male screw)

Downward gradient

Min. 1/100

Min.

3-15/16 in.

Min. 1-31/32 in.

Drain joint (supplied)

3-23. 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 flow. Therefore in the case of 36 Type, the flow 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 flow volume may drop too low at each air outlet.

(in.WG)

1.00

0.80

0.60

0.40

External Static Pressure

0.20

NOTE

36 Type48 Type

Limit line

883 1059 1236

Air Flow (CFM) Air Flow (CFM)

H: At shipment

Limit line

Inspection plug

Fig. 3-86

Fig. 3-85

(in.WG)

1.00

0.80

0.60

0.40

External Static Pressure

0.20

Limit li

Limit line

1059 1236 1412

H,M

Page 47

 Ceiling-Mounted Type (T Type)

3-24. Required Minimum Space for Installation and Service

(1) Dimensions of suspension bolt pitch and unit

Table 3-6

Dimension

Type

12, 18

ABC

33-21/32 35-53/64 8-17/64

Unit: in.

6-11/16

Air intake

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

12-19/32

(Suspension bolt pitch)

Ceiling side

(Suspension bolt pitch)

26-49/64

1-5/641-5/64

Air outlet

Fig. 3-87

(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

3-5/16

1-17/32

Left drain position Right drain position

2-23/64

1-1/4

2-21/64

2-61/64

Liquid tubing

Gas tubing

9/64

5-3/4

3-61/64 3-13/16

4-9/64

2-3/64

6-47/64

1-17/32

Right side

8-1/2

(Liquid tubing • Gas tubing)

6-11/32

9-7/8

Fig. 3-88

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

Unit: in.

Rear outlet port

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

3-35/64

10-5/16

4-59/64 2-53/64

13-21/32

3-11/64

4-11/64

Unit: in.

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

Fig. 3-89

Right-side drain hose outlet port

Side panel

Position of plate inside side panel

Page 48

(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)

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

3-25. 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. 3-91).

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.

5-5/16

Ceiling

Fig. 3-90

Figure shows view from top

Wall

ø3-15/16 ceiling opening

Full-scale installation diagram

Hole-in-anchor Hole-in-plug

4-59/64

Fig. 3-91

Concrete Insert

3-35/64

6-7/64

Unit: in.

Ceiling

Wall

(3) Depending on the ceiling type:

a) Insert suspension bolts as shown in Fig. 3-92.

b) Use existing ceiling supports or construct a

suitable support as shown in Fig. 3-93.

WARNING

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. 3-92 and 3-93. The distance of each exposed bolt must be of equal length within 1-15/16". (Fig. 3-94)

Screw

Latch

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

Slide

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

Fig. 3-92

Ceiling tiles

Ceiling support

Fig. 3-93

Hinge

unit

Ceiling surface

Fixture

Fig. 3-94

Within

1-15/16"

Air-intake grille

Fig. 3-95

Page 49

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

latch of the air-intake grilles, open the grilles, and remove them by pushing the claws of the hinges as shown in Fig. 3-95. Then remove both side panels sliding them along the unit toward the front after removing the 2 attachment screws. (Fig. 3-96)

(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. 3-97 and 3-98)

(7) Suspend the indoor unit as follows:

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

shown in Fig. 3-99.

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

in order to fix it in place. (Fig. 3-100)

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

the indoor unit as shown in Fig. 3-101.

NOTE

The ceiling surface is not always level. Please confirm 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 fill the gap with an appropriate insulation or filler material.

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

holes in the wall. (Fig. 3-102)

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

PVC pipe at a slight angle to fit. Insert the PVC pipe in the wall. (Fig. 3-103)

Slide toward front side

Unit

Side panel

Fixture

Fig. 3-96

Suspension bolt (field supply)

Ceiling surface

Washer (supplied)

Double nut (field supply)

Fig. 3-97

Suspension bolt (field supply) Washer (field supply)

Washer (supplied)

Double nut (field supply)

Fig. 3-98

Fig. 3-100

NOTE

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

Indoor side

Outdoor

side

(supplied)

PVC pipe (locally purchased)

Washer

Suspension bolt

Fig. 3-99

Fig. 3-101

INSIDE

Wall

Ceiling surface

Approx.

63/64

Nut (field supply)

OUTSIDE

PVC pipe

Slight angle

Fig. 3-102

Cut at slight angle

Fig. 3-103

Page 50

3-26. 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. 3-104)

3-27. Shaping the Tubing

 The positions of the refrigerant tubing connections are

shown in the figure 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. 3-89.

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

L-shape tubing kit is required.

Rear outlet port

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

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

", knock-out)

Power supply outlet

", knock-out)

(ø1-3/16

Rear tubing hole

Left-side drain hose outlet port

Fig. 3-104

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 figure below, to match the positions of the tubes. Then draw out the tubing.

Rear cover

Fig. 3-105

3-28. 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

 To install the drain hose, first 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.

 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).

 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. 3-107)

CAUTION

 Attach so that the hose band fastener is

on the side of the drain port. (Fig. 3-108)

 Attach the hose bands so that each is

approximately 13/64 – 63/64 in. from the end of the supplied drain hose.

Fig. 3-106

Donward gradient

Min. 1/100

Good

Not good

Fig. 3-107

Page 51

 Never allow traps to occur in the course of the piping.  Insulate any piping inside the room to prevent drip-

ping.

 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

Screwdriver

Drain port

routed through the left side, refer to Fig. 3-105, and follow the procedure above to

Rubber stopper

install the hose. Re-attach the rubber stopper that was earlier removed onto the right side. 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.

Tw ist tie (4 ties, supplied)

Unit drain port

13/64

63/64 63/64

Unit drain pan

CAUTION

Drain hose insulation (supplied)

5-33/64

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

Drain hose (supplied)

13/64

Hose band (2 bands, supplied)

Fig. 3-108

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

Position to fasten hose bands

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 controller wiring inlet ports are located at the rear and top (for use with the wired remote controller). For details, refer to Fig. 3-104. For the method used to insert the wiring, refer to the figure below. (Fig. 3-109)

CAUTION

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 specifications, and following local electrical codes and regulations.

Inter-unit control wiring

ø1-9/32 knock-out

Eyelet (supplied)

Powe supply outlet

Fig. 3-109

Page 52

 Wall-Mounted Type (K Type)

3-29. 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 figure at right, and remove the rear panel.

NOTE

Tubing can be extended in 4 directions as shown in Fig. 3-111. Select the direction which will provide the shortest run to the outdoor unit.

Screws used during transportation

Press

Remove the rear panel

Fig. 3-110

Left-rear tubing

3-30. 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 carpenter’s level or tape measure to measure down from the ceiling.

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

(Fig. 3-112)

(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 attach-

ment, make a hole (dia. 3-5/32") in the wall. (Fig. 3-113)

(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. 3-114)

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

side only) and insert in the wall. (Fig. 3-115)

NOTE

Left tubing

Center of left rear tubing hole

Fig. 3-111

Center of right rear tubing hole

Tubing hole diameter ø3-5/32

Fig. 3-112

Indoor side

Outdoor side

Right-rear tubing (recommended)

ht tubin

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

CAUTION

Avoid areas where electrical wiring or conduits are located.

3-31. Installing the Rear Panel onto the Wall

Confirm 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. (Fig. 3-116)

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

Plastic cover

INSIDE

Wall

OUTSIDE

PVC pipe

Slight angle

panel over the stud locations and then mount the rear panel.

Fig. 3-115

Fig. 3-113

PVC pipe (locally purchased)

Cut at slight angle

Fig. 3-114

Fig. 3-116

Page 53

(2) Check with a tape measure or carpenter’s level. This is

important so that the unit is correctly installed. (Fig. 3-117)

(3) Make sure the panel is flush 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. 3-118)

Fig. 3-117

3-32. 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.

Removing the grille

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

(Fig. 3-119)

(2) Remove the filter. (Fig. 3-119)

(3) Adjust the flap so that it is horizontal. (Fig. 3-120)

(4) Open the installation screw covers below the grille

(3 locations). (Fig. 3-120)

(5) Remove the screws. (Fig. 3-120)

(6) Remove the grille. (Fig. 3-121)

Attaching the grille

(1) Close the flap.

(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 fitted tightly together.

Filter

Flap

Fig. 3-118

Open the

Fig. 3-119

Fig. 3-120

3/16" dia. hole

Rawl plug

Intake grille

rille

Installation screw cover

3-33. 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. 3-122)

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 flare nuts on the 24-type (only) are large; therefore, use the supplied insulation material.

When left and right side tubin

Fig. 3-122

Right tubing outlet

Remove the grille

Fig. 3-121

Installation tabs

Frame

Installation tabs

Fig. 3-123

Page 54

(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. 3-123)

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. 3-124)

Raising the clamp to lift up the indoor unit will facilitate this work. (Fig. 3-125)

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 3-1. “Removing the Rear Panel from the Unit” (Fig. 3-110). Then lift up the indoor unit to remove it.

3-34. Shaping the Tubing

Right-rear tubing

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

(Fig. 3-126)

(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 sufficient 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.

Rear panel tab

Plastic cover

Press

Fig. 3-124

Clamp

Fig. 3-125

Insulating

Fig. 3-126

tape

Refrigerant

tubing

Indoor and outdoor unit connection wiring

Left or left-rear tubing

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

Provide sufficient length for the connections to be made. Next, bend the tubing with a pipe bender, and connect them.

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

hose together with insulating tape, as shown in the figure at right. (Fig. 3-128) Then fit 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.

3-35. Installing the Drain Hose

a) The drain hose should be slanted downward to the

outside. (Fig. 3-129) 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 floors.

* Foamed polyethylene or its equivalent is recommended.

WARNING

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

Insulating tape

Drain hose

Indoor unit

Fig. 3-127

Fig. 3-128

Fig. 3-129

Insulation

Refrigerant tubing

Rear panel

Inter-unit wiring

Slant

Refrigerant tubing

Page 55

3-36. 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.

KHX0752 / 0952 / 1252 / 1852

CR-KR74GXH56A-0

KHX2452

CR-KR254GXH56A-0

Setting at time of factory shipment

Slide No. 3 on SW101 from ON OFF.

Page 56

4. HOW TO INSTALL THE OUTDOOR UNIT

4-1. Installing the Outdoor Unit

 Use concrete or a similar material to create the base, and

ensure good drainage.

 Ordinarily, ensure a base height of 2 in. or more. If a drain

pipe is used, or for use in cold-weather regions, ensure a height of 6 in. or more at the feet on both sides of the unit. (In this case, leave clearance below the unit for the drain pipe, and to prevent freezing of drainage water in cold-weather regions.)

 Refer to the Fig. 4-1 for the anchor bolt dimensions.

 Be sure to anchor the feet with the anchor bolts (M10 or

3/8"). In addition, use anchoring washers on the top side. (Use large square 1-1/4" × 1-1/4" SUS washers with diameters of 3/8".) (Field supply)

4-2. Drainage Work

Follow the procedure below to ensure adequate draining for the outdoor unit.

 For the drain port dimensions, refer to the figure at right.

 Ensure a base height of 6 in. or more at the feet on both

sides of the unit.

Drain port (2 locations)

6-47/64 25-63/64 4-3/8

5-29/328-5/8

13-13/64

11-21/32

33/64 33/64

33/64

25/32

3/4

14-61/64

15-15/16

19/32 25/64

4-3. Routing the Tubing and Wiring

 The tubing and wiring can be extended out in 4 directions:

front, rear, right, and down.

 The service valves are housed inside the unit. To access

them, remove the inspection panel. (To remove the inspection panel, remove the 3 screws, then slide the panel downward and pull it toward you.)

(1) If the routing direction is through the front, rear, or right,

use a nipper or similar tool to cut out the knockout holes for

the inter-unit control wiring outlet, power wiring outlet, and

tubing outlet from the appropriate covers A and B.

(2) If the routing direction is down, use a nipper or similar tool to

cut out the lower flange from cover A.

CAUTION

 Route the tubing so that it does

not contact the compressor, panel, or other parts inside the unit. Increased noise will result if the tubing contacts these parts.

 When routing the tubing, use a

tube bender to bend the tubes.

Drain port

Inter-unit control wiring

Inspection panel

Cover A

Power supply

Front

Anchor bolt (M10 or 3/8")

Unit: in.

Fig. 4-1

Rear

Cover B

Right

Down

Tubing outlet

Fig. 4-2

Page 57

5. ELECTRICAL WIRING

5-1. General Precautions on Wiring

(1) Before wiring, confirm 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 and

circuit 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 accor-

dance with the wiring system diagram. Wrong

wiring may cause the unit to misoperate 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 misoperation that

occurs as a result of such unauthorized changes.

(7) Regulations on wire diameters differ from locality

to locality. For field 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.

 Use shielded wires for inter-unit control wiring

between units and ground the shield on both sides.

(9) If the power supply cord of this appliance is dam-

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

5-2. Recommended Wire Length and Wire Diameter for Power Supply System

Outdoor unit

Type

CHX03652

CHX06052 50 A

Indoor unit

Type

A, X, T, U

Control wiring

AWG #18 (0.75 mm

Use shielded wiring*Use shielded wiring Use shielded wiring

Max. 3,280 ft.

(A) Power supply wiring

For field wiring rules, please refer

to your LOCAL ELECTRICAL CODES

(B) Power supply wiring

For field wiring rules, please refer

to your LOCAL ELECTRICAL CODES

) AWG #18 (0.75 mm2) AWG #18 (0.75 mm2)

(D) Remote control wiring (E) Control wiring for group control

Max. 1,640 ft.

Time delay fuse or

circuit capacity

30 A

Time delay fuse or

circuit capacity

15 A

Max. 1,640 ft. (Total)

NOTE

* With ring-type wire terminal.

Page 58

5-3. Wiring System Diagram

Power supply 208 / 230 V, 1ø, ~60Hz

Remote controller

WHT BLK

Power supply 208 / 230 V, 1ø, ~60Hz

Remote controller

WHT BLK

Group control:

Power supply 208 / 230 V, 1ø, ~60Hz

L1 L2

Ground

L1 L2

Ground

L1 L2

Ground

Indoor unit (No. 1)

Indoor unit (No. 2)

Ground

Outdoor unit INV unit

Power supply

208 / 230 V, 1ø, ~60Hz

Ground

Indoor unit (No. 3)

Ground

Indoor

Power supply 208 / 230 V, 1ø, ~60Hz

Remote controller

WHT BLK

L1 L2

Ground

unit (No. n)

Ground

NOTE

(1) Refer to Section 5-2. “Recommended Wire Length

and Wire Diameter for Power Supply System” for the explanation of “A,” “B,” “C,” “D,” and “E,” 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.

(4) Regarding the R.C. address setting, refer to page

72. Auto. address setting can be executed by remote controller automatically. Refer to page 72 – 76.

1(L1) 2(L2)

Power supply

7P terminal board

Inter-unit

control wiring

X, A, U, D, T Type

5P terminal board

123 45

1(L1)2(L2)

Power

supply

U1 U2

Inter-unit

control wiring

K Type

Remote

controller

Page 59

CAUTION

(1) When linking outdoor units in a network (S-net link system), disconnect the terminal extended from the

short plug (CN003, 2P 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.)

Otherwise the communication of S-net link system is not performed. 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. 5-1)

Outdoor unit Outdoor unit Outdoor unit

Prohibited

Indoor unit Indoor unit Indoor unit Indoor unit

Fig. 5-1

(3) Do not install inter-unit control wiring such as star

branch wiring. Star branch wiring causes mis-address setting.

Outdoor unit Indoor unit Indoor unit Indoor unit

(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. 5-3)

Outdoor unit

Indoor unit Indoor unit Indoor unit

Branch point

Fig. 5-2

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

Branch point

16 or fewer

Indoor unit Indoor unit Indoor unit Indoor unit

more than 3.3 ft.

Indoor unit

more than 3.3 ft.

Indoor unit

more than 3.3 ft.

Indoor unit

Indoor unit Indoor unit Indoor unit

Fig. 5-3

Page 60

(5) Use shielded wires for inter-unit control wiring (c)

and ground the shield on both sides, otherwise misoperation from noise may occur. (Fig. 5-4) Connect wiring as shown in Section “5-3. Wiring System Diagram.”

Shielded wire

WARNING

Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire 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 fixing 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 about 3/8 in. and tightly twist the wire ends. (Fig. 5-5)

(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. 5-6)

Special washer

Wire

Ground

Strip 3/8 in.

Screw

Ring pressure terminal

Terminal plate

Ground

Fig. 5-4

Stranded wire

Ring pressure

terminal

Fig. 5-5

Screw and Special washer

Ring pressure

terminal

Wire

Fig. 5-6

Page 61

6. HOW TO PROCESS TUBING

Deburring

6-1. Connecting the Refrigerant Tubing

Use of the Flaring Method

Many of conventional split system air conditioners employ the flaring method to connect refrigerant tubes which run between indoor and outdoor units. In this method, the copper tubes are flared at each end and connected with flare 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 file. This process is important and should be done carefully to make a good flare. (Fig. 6-1)

NOTE

When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube. (Fig. 6-2)

(3) Remove the flare nut from the unit and be sure to

mount it on the copper tube.

Before

After

Fig. 6-1

Copper tubing

Reamer

Fig. 6-2

(4) Make a flare at the end of copper tube with a flare

tool.* (Fig. 6-3)

(*Use “RIGID

” or equivalent.)

NOTE

A good flare should have the following characteristics:

 inside surface is glossy and smooth

 edge is smooth

 tapered sides are of uniform length

Flare nut

Copper tubing

Flare tool

Fig. 6-3

Page 62

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 flare and union before connecting them together. This is effective for reducing gas leaks. (Fig. 6-4)

(3) For proper connection, align the union tube and flare tube

straight with each other, then screw in the flare nut lightly at first to obtain a smooth match. (Fig. 6-5)

 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 flare.

Cautions During Brazing

 Replace air inside the tube with nitrogen gas to

prevent copper oxide film 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 dam-

aged. 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 film. These agents adversely affect the

refrigerant and refrigerant oil, and may cause damage

or malfunctions.

6-2. 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 flare nuts, apply specified torque as at right:

 When removing the flare nuts from the tubing connections,

or when tightening them after connecting the tubing, be sure to use 2 monkey wrenches or spanners as shown. (Fig. 6-6) If the flare nuts are over-tightened, the flare may be damaged, which could result refrigerant leakage and cause in injury or asphyxiation to room occupants.

 For the flare nuts at tubing connections, be sure to use the

flare nuts that were supplied with the unit, or else flare 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 here and here

Fig. 6-4

Union

Flare nut

Fig. 6-5

Torque wrench

Indoor unit

Outdoor unit

Spanner

Fig. 6-6

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)

Tightening torque, approximate

120 – 160 lbs

(140 – 180 kgf · cm)

300 – 360 lbs

(340 – 420 kgf · cm)

430 – 530 lbs

(490 – 610 kgf

590 – 710 lbs

(680 – 820 kgf

870 – 1040 lbs

(1000 – 1200 kgf

in.

cm)

in.

cm)

in.

cm)

Tube thickness

1/32" (0.8 mm)

5/128" (1.0 mm)

over 5/128" (1.0 mm)

Because the pressure is approximately 1.6 times higher than conventional refrigerant pressure, the use of ordinary flare 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 flare caused by

over-tightening of the flare nuts, use the table above as a guide when tightening.

 When tightening the flare nut on the liquid tube,

use a monkey wrench with a nominal handle length of 7-7/8 in.

Page 63

6-3. Insulating the Refrigerant Tubing

Tubing Insulation

 Thermal insulation must be applied to all unit tubing,

including distribution joint (purchased separately).

* 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" 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.

Taping the flare nuts

Two tubes arranged together

Liquid tubing

Insulation

Gas tubing

Fig. 6-7

CAUTION

If the exterior of the outdoor unit valves has been finished with a square duct covering, make sure you allow sufficient space to use the valves and to allow the panels to be attached and removed.

Wind the white insulation tape around the flare nuts at the gas tube connections. Then cover up the tubing connections with the flare insulator, and fill the gap at the union with the supplied black insulation tape. Finally, fasten the insulator at both ends with the supplied vinyl clamps. (Fig. 6-8)

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.

CAUTION

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.

Sealer (supplied)

Unit side insulator

Flare nut

Drain insulator and clamp. Large (supplied)

Packing clamp. Small hose band (supplied)

Insulation tape (white)

(supplied)

Vinyl clamps (supplied)

Flare insulator (supplied)

Tube insulator (not supplied) Heat resistant 248°F or above

Fig. 6-8

Refrigerant tubing and insulator (not supplied)

Drain pipe and insulator (not supplied)

Insulation tape

Vinyl

Flare

clamp

insulator

Seal

The procedure used for installing the insulator for both gas and liquid tubes is the same.

Fig. 6-9

Never grasp the drain or refrigerant connecting outlets when moving the unit.

Page 64

6-4. 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 overflowing 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. 6-10)

Insulated tubes

Clamp

Drain hose

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.

6-5. Finishing the Installation

After finishing 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. 6-11)

Fig. 6-10

Apply putty here

Tubin

Fig. 6-11

Page 65

7. AIR PURGING

Air and moisture in the refrigerant system may have undesirable effects as indicated below.

 pressure in the system rises  operating current rises  cooling (or heating) efficiency drops  moisture in the refrigerant circuit may freeze and block

capillary tubing

 water may lead to corrosion of parts in the refrigerant

system

Therefore, the indoor unit and tubing between the indoor and outdoor unit must be leak tested and evacuated to remove any noncondensables and moisture from the system.

 Air Purging with a Vacuum Pump (for Test Run)

Preparation

Check that each tube (both liquid and gas tubes) between the indoor and outdoor units has been properly connected and all wiring for the test run has been completed. Remove the valve caps from both the gas tube and liquid tube service valves on the outdoor unit. Note that both liquid and gas tube service valves on the outdoor unit are kept closed at this stage.

Pressure gauge

Manifold gauge

Fig. 7-1

Vacuum pump

Outlet Inlet

Fig. 7-2

Manifold valve

Lo Hi

Leak test

(1) Attach a manifold valve (with pressure gauges) and dry

nitrogen gas cylinder to this service port with charge hoses.

CAUTION

Use a manifold valve for air purging. If it is not available, use a stop valve for this purpose. The “Hi” knob of the manifold valve must always be kept closed.

(2) Pressurize the system to no more than

512 psig (36 kgf/cm

G) with dry nitrogen gas and close the cylinder valve when the gauge reading reaches 512 psig (36 kgf/cm

G). Then, test for leaks with liquid soap.

CAUTION

To avoid nitrogen entering the refrigerant system in a liquid state, the top of the cylinder must be higher than the bottom when you pressurize the system. Usually, the cylinder is used in a vertical standing position. (Refer to the previous page.)

Gas tube

Liquid tube

Cylinder valve

Open

Fig. 7-3

Charge hose

Nitrogen gas cylinder (In vertical standing position)

Service port ø5/16"

Outdoor unit

Page 66

(3) Do a leak test of all joints of the tubing (both indoor and

NOTE

outdoor) and both gas tube and liquid tube service valves. Bubbles indicate a leak. Wipe off the soap with a clean cloth after the leak test.

(4) After the system is found to be free of leaks, relieve the

nitrogen pressure by loosening the charge hose connector at the nitrogen cylinder. When the system pressure is reduced to normal, disconnect the hose from the cylinder.

Evacuation

(1) Attach the charge hose end described in the preceding

steps to the vacuum pump to evacuate the tubing and indoor unit. Confirm that the “Lo” knob of the manifold valve is open. Then, run the vacuum pump. The operation time for evacuation varies with the tubing length and capacity of the pump. The following table shows the amount of time for evacuation:

Pressure gauge

Manifold valve

Lo Hi

Vac uum pump

Service port ø5/16"

Required time for evacuation

when 30 gal/h vacuum pump is used

If tubing length is If tubing length is

less than 49 ft. longer than 49 ft.

45 min. or more 90 min. or more

The required time in the above table is calculated based on the assumption that the ideal (or target) vacuum condition is less than –14.7 psig (–755 mmHg, 5 Torr).

(2) When the desired vacuum is reached, close the “Lo”

knob of the manifold valve and turn off the vacuum pump. Confirm that the gauge pressure is under –14.7 psig (–755 mmHg, 5 Torr) after 4 to 5 minutes of vacuum pump operation.

Open

Gas tube

Outdoor unit

Open

Liquid tube

Fig. 7-4

Page 67

CAUTION

Use a cylinder designed for use with R410A respectively.

Manifold valve

Charging additional refrigerant

 Charging additional refrigerant (calculated from the

liquid tube length as shown in Section 1-7 “Additional Refrigerant Charge”) using the liquid tube service valve. (Fig. 7-5)

 Use a balance to measure the refrigerant accurately.

 If the additional refrigerant charge amount cannot

be charged at once, charge the remaining refrigerant in liquid form by using the gas tube service valve with the system in cooling operation mode at the time of test run. (Fig. 7-6)

Finishing the job

(1) With a hex wrench, turn the liquid tube service

valve stem counter-clockwise to fully open the valve.

(2) Turn the gas tube service valve stem

counter-clockwise to fully open the valve.

CAUTION

To avoid gas from leaking when removing the charge hose, make sure the stem of the gas tube is turned all the way out (“BACK SEAT” position).

Pressure gauge

Gas tube

Liquid tube

Lo Hi

Open

Valve

Liquid

R410A

Outdoor unit

(3) Loosen the charge hose connected to the gas

tube service port (for ø5/16" tube) slightly to release the pressure, then remove the hose.

(4) Replace the service port cap on the gas tube

service port and fasten the cap securely with an monkey spanner or box wrench. This process is very important to prevent gas from leaking from the system.

(5) Replace the valve caps at both gas tube and liquid

tube service valves and fasten them securely.

This completes air purging with a vacuum pump. The air conditioner is now ready for a test run.

Fig. 7-5

Open

Gas tube

Open

Outdoor unit

Liquid tube

Open

Fig. 7-6

Page 68

8. TEST RUN

8-1. Preparing for Test Run

 Before attempting to start the air conditioner,

check the following.

(1) All loose matter is removed from the cabinet,

especially steel filings, bits of wire, and clips.

(2) The control wiring is correctly connected and all

electrical connections are tight.

(3) The transportation pads for the indoor fan have

been removed. If not, remove them now.

(4) The power has been connected to the unit for at

least 5 hours before starting the compressor. The bottom of the compressor should be warm to the touch and the crankcase heater around the feet of the compressor should be hot to the touch. (Fig. 8-1)

(5) Both the gas and liquid tube service valves are

open. If not, open them now. (Fig. 8-2)

(6) Request that the customer be present for the trial

run. Explain the contents of the instruction manual, then have the customer actually operate the system.

(7) Be sure to give the instruction manual and

warranty certificate to the customer.

(8) When replacing the control PCB, be sure to make

all the same settings on the new PCB as were in use before replacement. The existing EEP ROM is not changed, and is connected to the new control PCB.

(Power must be turned ON at least 5 hours before attempting test run)

Power mains switch

Fig. 8-1

Liquid tube service cap

Gas tube service cap

Fig. 8-2

Page 69

8-2. Test Run Procedure

<Outdoor

unit control PCB>

Unit No. setting switch

(S004)

(Check the link wiring.)

Unit No. setting switch

(S002 and S003)

Refer to Fig. 8-4

Recheck the items to check before the test run.

Set the No. of indoor units.

Are the inter-unit control wires

connected to more than 1 refrigerant

system?

YES

Set the system address.

When multiple outdoor units exist, disconnect the terminals

extended from the shor ted plugs (CN33) at all outdoor main unit

Alternatively, move the sockets to the OPEN side .

PCBs except for 1.

Items to Check Before the Test Run

1. Turn the remote power switch on at least 5 hours before the test, in order to energize the crank case heater.

2. Turn the outdoor service valves (2 locations) to the full-open positions.

 Use caution when making the settings. If

there are duplicated system addresses, or if the settings for the Nos. of the indoor units are not consistent, an alarm will occur and the system will not start.

 These settings are not made on the

indoor unit PCB.

CASE 1

CASE 3BCASE 3A

Is it OK to start the compressors?

Turn ON the indoor and

outdoor unit power.

Short-circuit the mode change pin

the outdoor main unit PCB.

(CN50) on

At the same time, short-circuit the

automatic address pin (CN51) for 1

second or longer, then pull it out.

*3 *3

Start indoor and outdoor unit

ng operation.

cooli

LED 1 and 2 blink alternately.

Are LEDs 1 and 2 on the

outdoor unit PCB OFF?

Is it possible to turn ON the power only

for the 1 refrigerant system where the

test run will be performed?

Will automatic address setting be

performed in Heating mode?

YES

Is it OK to start the compressors?

Turn ON the indoor and

outdoor unit power.

Short-circuit the automatic address

pin (CN51) on the outdoor unit PCB

for 1 second or longer,

then release it.

Start indoor and outdoor unit

heating operation.

LED 1 and 2 blink alternately.

YES

CASE 2

YES

Make necessary corrections.

Turn OFF the indoor and

outdoor unit power

Check the alarm contents.

Make necessary

corrections

Turn OFF the indoor

and outdoor unit

Check the alarm

contents.

Refer to “Table of Self-Diagnostic Functions and Description of Alarm Displays.”

*2 A minimum of 5 hours must have passed after the

power was turned ON to the outdoor unit.

*3 All in

door units operate in all refrigerant systems

where the power is ON.

Turn ON the indoor and

outdoor unit power for that

gerant system only.

refri

Short-circuit the automatic address pin (CN51)

on the outdoor unit PCB for 1 second or longer,

then release it.

LED 1 and 2 blink alternately

(about 2 or 3 minutes).

Are LEDs 1 and 2 on the

outdoor unit PCB OFF?

YES

Set the wired remote controller for test run.

Refer to the remote

controller test-run

settings.

Check that test run preparation is OK.

(Do not allow the short-circuited pins to remain short-circuited.)

Does system operate?

YES

Return remote control to normal mode

End te

st run.

Check and make corrections according to

“Table of Self-Diagnostic Functions.”

Fig. 8-3

Page 70

8-3. Outdoor Unit PCB Setting

CN33

S003

S002

S004

CN51

CN50

D043 (LED2)

D042 (LED1)

Fig. 8-4

Page 71

Examples of the No. of indoor units settings

No. of indoor units

1 unit (factory setting)

2 units

9 units

Indoor unit setting (S004)

(Rotary switch, red)

Set to 1

Set to 2

Set to 9

Examples of refrigerant circuit (R.C.) address settings (required when link wiring is used)

System address No.

System 1 (factory setting)

System 11

System 21

System 30

System address (S003)

(2P DIP switch, blue)

Both OFF

1 ON

2 ON

1 & 2 ON

10 20

OFF

System address (S002)

(Rotary switch, black)

Set to 1

Set to 0

Page 72

8-4. Auto Address Setting Basic wiring diagram: Example (1)

• If link wiring is not used (The inter-unit control wires are not connected to multiple refrigerant systems.)

Indoor unit addresses can be set without operating the compressors.

No. 1 unit settings

System address

(system 1 setting)

(S003) (S002) ON

OFF

Outdoor Unit

Indoor Unit

Remote controller

(S004)

No. of indoor units

(8 units setting)

Unit

No. 1

1-1

(S004)

Inter-unit control wiring

1-2 1-3

1-8

Remote controller cross-over wiring

Fig. 8-5

(1) Automatic Address Setting from the Outdoor Unit

1. On the outdoor unit control PCB, check that the system address rotary switch (S002) is set to “1” and that the DIP switch (S003) is set to “0.” (These are the settings at the time of factory shipment.)

OFF

2. To set the number of indoor units that are connected to the outdoor unit to 8, on the outdoor unit control PCB set the No. of indoor units rotary switch (S004) to “8.”

3. Turn ON the power to the indoor and outdoor units.

4. On the outdoor unit control PCB, short-circuit the automatic address pin (CN51) for 1 second or longer, then release it.

↓

(Communication for automatic address setting begins.)

↓

* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

The LED that indicates that automatic address setting is in progress turns OFF and the process is stopped.

(Automatic address setting is completed when LEDs 1 and 2 on the outdoor unit control PCB turn OFF.)

↓

5. Operation from the remote controllers is now possible.

* To perform automatic address setting from the remote controller, perform steps 1 to 3, then use the remote controller and

complete automatic address setting. Refer to “Automatic Address Setting from the Remote Controller.”

Page 73

Basic wiring diagram: Example (2)

System address

(system 1 setting)

(S003)

OFF

(S002)

Outdoor unit

system 1

Indoor unit

If link wiring is used

No. 1 unit settings

No. of indoor units (6 units setting)

Unit

No. 1

1-1 1-2

Remote

controller

* When multiple outdoor units exist, remove the socket that

is used to short-circuit the terminal plug (CN33) from all outdoor unit PCBs except for 1.

Alternatively, move the sockets to the “OPEN” side.

(S004)

Leave the socket that is used to short-circuit the terminal plug. (CN33)

Inter-unit control wiring

1-3 1-6

Remote controller communication wiring

No. 2 unit settings

System address

(system 2 setting)

(S003)(S002)

Outdoor unit

OFF

system 2

No. of indoor units

(7 units setting)

(S004)

Unit

No. 1

Leave the socket that is used to open circuit the terminal plug (CN33).

Inter-unit control wiring

To other system link wiring

Indoor unit

Remote

controller

2-1 2-2 2-7

Remote controller cross-over wiring

Make settings as appropriate for the cases listed below.

(Refer to the instructions on the following pages.)

Indoor and outdoor unit power can be turned ON for each system separately.

Indoor and outdoor unit power cannot be turned ON for each system separately.

Automatic address setting in Heating mode

Automatic address setting in Cooling mode

Case 1

Case 2

Case 3

Fig. 8-6

Page 74

Case 1

 Indoor and outdoor unit power can be turned ON for each system separately.

Automatic Address Setting (no compressor operation)

Indoor unit addresses can be set without operating the compressors.

Automatic Address Setting from Outdoor Unit

OFF

2. To set the number of indoor units that are connected to the outdoor unit to 6, on the outdoor unit control PCB set the No. of indoor units rotary switch (S004) to “6.”

3. At the outdoor unit where all indoor and outdoor unit power has been turned ON, short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

↓

(Communication for automatic address setting begins.)

↓

* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.

(Automatic address setting is completed when LEDs 1 and 2 on the outdoor unit control PCB turn OFF.)

↓

4. Next turn the power ON only for the indoor and outdoor units of the next (different) system. Repeat steps 1 – 3 in the same way to complete automatic address settings for all systems.

↓

5. Operation from the remote controllers is now possible.

* To perform automatic address setting from the remote controller, perform steps 1 and 2, then use the remote controller

complete automatic address setting. Refer to “Automatic Address Setting from the Remote Controller.”

Page 75

Case 2

 Indoor and outdoor unit power cannot be turned ON for each system separately.

Automatic Address Setting in Heating Mode

In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating. Therefore perform this process only after completing all refrigerant tubing work.

Automatic Address Setting from Outdoor Unit

1. Perform steps 1 and 2 in the same way as for .

Case 1

2. Turn the indoor and outdoor unit power ON at all systems.

↓

3. To perform automatic address setting in , on the outdoor unit control PCB in the refrigerant

Heating mode

system where you wish to set the addresses, short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out. (Be sure to perform this process for one system at a time. Automatic address settings cannot be performed for more than one system at the same time.)

↓

(Communication for automatic address setting begins, the compressors turn ON, and automatic address setting in heating mode begins.)

(All indoor units operate.)

↓

* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.

(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the outdoor unit control PCB turn OFF.)

4. At the outdoor unit in the next (different) system, short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

↓

(Repeat the same steps to complete automatic address setting for all units.)

↓

5. Operation from the remote controllers is now possible.

* To perform automatic address setting from the remote controller, perform steps 1 and 2, then use the remote controller

complete automatic address setting. Refer to “Automatic Address Setting from the Remote Controller.”

Page 76

Case 3

 Indoor and outdoor unit power cannot be turned ON for each system separately.

Automatic Address Setting in Cooling Mode

In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating. Therefore perform this process only after completing all refrigerant tubing work. Automatic address setting can be performed during Cooling operation.

Automatic Address Setting from Outdoor Unit

1. Perform steps 1 and 2 in the same way as for .

Case 1

2. Turn the indoor and outdoor unit power ON at all systems.

↓

3. To perform automatic address setting in , on the outdoor unit control PCB in the refrigerant system

Cooling mode

where you wish to set the addresses, short-circuit the mode change 2P pin (CN50). At the same time, short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out. (Be sure to perform this process for one system at a time. Automatic address settings cannot be performed for more than one system at the same time.)

↓

(Communication for automatic address setting begins, the compressors turn ON, and automatic address setting in Cooling mode begins.)

(All indoor units operate.)

↓

* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.

(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the outdoor unit control PCB turn OFF.)

4. At the outdoor unit in the next (different) system, short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

↓

(Repeat the same steps to complete automatic address setting for all units.)

↓

5. Operation from the remote controllers is now possible.

* Automatic address setting in Cooling mode cannot be done from the remote controller.

Automatic Address Setting from the Remote Controller

Selecting each refrigerant system individually for automatic address setting

---Automatic address setting for each system: Item code “A1”

 Press the remote controller timer time button and button at the same

time. (Press and hold for 4 seconds or longer.)

 Next, press either the temperature setting or button.

(Check that the item code is “A1.”)

 Use either the or button to set the system No. to perform

automatic address setting.

 Then press the button.

(Automatic address setting for one refrigerant system begins.) (When automatic address setting for one system is completed, the system returns to normal stopped status.) <Approximately 4 – 5 minutes is required.> (During automatic address setting, “SETTING” is displayed on the remote controller. This message disappears when automatic address setting is completed.)

 Repeat the same steps to perform automatic address setting for each successive system.

Page 77

Display during automatic address setting

 On outdoor unit PCB

LED

* Do not short-circuit the automatic address setting pin (CN51) again while automatic

address setting is in progress. Doing so will cancel the setting operation and will cause

Blink alternately

LEDs 1 and 2 to turn OFF.

* When automatic address setting has been successfully completed, both LEDs 1 and 2 turn OFF.

* LED 1 is D042. LED 2 is D043.

* If automatic address setting is not completed successfully, refer to the table below and correct the problem. Then

perform automatic address setting again.

 Display details of LEDs 1 and 2 on the outdoor unit control PCB

( : ON : Blinking : OFF)

LED 1 LED 2

Display meaning

After the power is turned ON (and automatic address setting is not in progress), no communication with the indoor units in that system is possible.

After the power is turned ON (and automatic address setting is not in progress), 1 or more indoor units are confirmed in that system; however, the number of indoor units does not match the number that was set.

Alternating

Simultaneous

Alternating

Automatic address setting is in progress.

Automatic address setting completed.

At time of automatic address setting, the number of indoor units did not match the number that was set.

(when indoor units are operating) indication appears on the display.

Refer to Table of Self-Diagnostic Functions and Description of Alarm Displays.

Note: indicates that the solenoid is fused or that there is a CT (current detection circuit) failure (current is detected when

the compressor is OFF).

 Remote controller display during automatic setting

is blinking

Request concerning recording the indoor/outdoor unit combination Nos.

After automatic address setting has been completed, be sure to record them for future reference.

List the outdoor unit system address and the addresses of the indoor units in that system in an easily visible location (next to the nameplate), using a permanent marking pen or similar means that cannot be erased easily.

Example: (Outdoor) 1 – (Indoor) 1-1, 1-2, 1-3… (Outdoor) 2 – (Indoor) 2-1, 2-2, 2-3…

These numbers are necessary for later maintenance. Please be sure to indicate them.

Page 78

Checking the indoor unit addresses

Use the remote controller to check the indoor unit address.

1. Press and hold the button and button for 4 seconds or longer (simple settings mode).

2. The address is displayed for the indoor unit that is connected to the remote controller. (Only the address of the indoor unit that is connected to the remote controller can be checked.)

3. Press the button again to return to normal remote controller mode.

1. Press and hold the button and button for 4 seconds or longer (simple settings mode).

2. “ALL” is displayed on the remote controller.

3. Next, press the button.

4. The address is displayed for 1 of the indoor units which is connected to the remote controller. Check that the fan of that indoor unit starts and that air is discharged.

5. Press the button again and check the address of each indoor unit in sequence.

6. Press the button again to return to normal remote controller mode.

Number changes to indicate which indoor unit is currently selected.

Remote Controller Test Run Settings

1. Press the remote controller button for 4 seconds or longer. Then press the button.

 “TEST” appears on the LCD display while the test run is in progress.  The temperature cannot be adjusted when in Test Run mode.

(This mode places a heavy load on the machines. Therefore use it only when performing the test run.)

2. The test run can be performed using the HEAT, COOL, or FAN operation modes. Note: The outdoor units will not operate for approximately 3 minutes after the power is turned ON and after

operation is stopped.

3. If correct operation is not possible, a code is displayed on the remote controller display. (Refer to “7-6. Meaning of Alarm Messages” and correct the problem.)

4. After the test run is completed, press the button again. Check that “TEST” disappears from the remote controller display. (To prevent continuous test runs, this remote controller includes a timer function that cancels the test run after 60 minutes.)

* If the test run is performed using the wired remote controller, operation is possible even if the cassette-type ceil-

ing panel has not been installed. (“P09” display does not occur.)

Page 79

8-5. Caution for Pump Down

Pump down means refrigerant gas in the system is returned to the outdoor unit. Pump down is used when the unit is to be moved, or before servicing the refrigerant circuit.

CAUTION

 This outdoor unit cannot collect more than the rated refrigerant amount as shown

by the nameplate on the back.

 If the amount of refrigerant is more than that recommended, do not conduct pump

down. In this case use another refrigerant collecting system.

8-6. Meaning of Alarm Messages

Table of Self-Diagnostics Functions and Description of Alarm Displays

Alarm messages are indicated by the blinking of LED 1 and 2 (D72, D75) on the outdoor unit PCB. They are also displayed on the wired remote controller.

 Viewing the LED 1 and 2 (D72 and D75) alarm displays

LED 1

LED 2

Alarm display

Alternating

LED 1 blinks M times, then LED 2 blinks N times. The cycle then repeats. M = 2: P alarm 3: H alarm 4: E alarm 5: F alarm 6: L alarm N = Alarm No. Example: LED 1 blinks 2 times, then LED 2 blinks 17 times. The cycle then repeats. Alarm is “P17.”

( : Blinking)

Possible cause of malfunction

Serial commu-nication errors Mis-setting

Remote controller is detecting error signal from indoor unit.

Indoor unit is detecting error signal from remote controller (and system controller).

Indoor unit is detecting error signal from outdoor unit.

Improper setting of indoor unit or remote controller.

During auto. address setting, number of connected units does not correspond to number set.

When turning on the power supply, number of connected units does not correspond to number set.

(Except R.C. address is “0.”)

Indoor unit communication error of group control wiring.

Error in receiving serial communication signal. (Signal from main indoor unit in case of group control) Ex: Auto address is not completed.

Error in transmitting serial communication signal.

Error in receiving serial communication signal. When turning on the power supply, the number of connected

indoor units does not correspond to the number set. (Except R.C.

address is “0.”)

Error of the outdoor unit in receiving serial communication signal from the indoor unit.

Indoor unit address setting is duplicated.

Remote controller address connector (RCU. ADR) is duplicated. (Duplication of main remote controller)

Starting auto. address setting is prohibited. This alarm message shows that the auto address connector CN100

is shorted while other RC line is executing auto address operation. Error in auto. address setting. (Number of connected indoor units

is less than the number set) Error in auto. address setting. (Number of connected indoor units

is more than the number set)

No indoor unit is connected during auto. address setting.

Error of outdoor unit address setting.

Error of main indoor unit in receiving serial communication signal

from sub indoor units.

Alarm contents

Alarm

message

<E01>

<E02>

<<E03>>

E04

<E06>

E08

<<E09>>

E12

E15

E16

E20

E25

E18

Continued

Page 80

Possible cause of malfunction

Serial commu-nication errors Mis-setting

Activation of protective device

Thermistor fault

EEPROM on indoor unit PCB failure

Protective device for compressor is activated

Improper setting.

Protective device in indoor unit is activated.

Protective device in outdoor unit is activated.

Indoor thermistor is either open or damaged.

Outdoor thermistor is either open or damaged.

Protective device for compressor No. 1 is activated.

This alarm message shows when the indoor unit for multiple-use is not connected to the outdoor unit.

Duplication of main indoor unit address setting in group control.

Duplication of outdoor R.C. address setting. There are 2 or more indoor units

controllers which have operation mode priority in 1 refrigerant circuit.

Group control wiring is connected to individual control indoor unit.

Indoor unit address is not set.

Capacity code of indoor unit is not set.

Capacity code of outdoor unit is not set.

Mis-matched connectio of refrigerant.

4-way valve operation failure

Thermal protector in indoor unit fan motor is activated.

Improper wiring connections of ceiling panel.

Float switch is activated.

2 sensor (detects low oxygen level) activated.

Compressor thermal protector is activated. Power supply voltage is unusual. (The voltage is more than 260 V or less than 160 V between L1 and L2 phase.)

Incorrect dischar

High pressure switch is activated.

Detective phase (3-phase outdoor unit only)

Compressor running failure resulting from missing phase in the compressor wiring, etc. (Start failure not caused by IPM or no gas.)

Outdoor unit fan motor is unusual. Overcurrent at time of compressor runs more than 80Hz (DCCT

secondary current or ACCT primary current is detected at a time other than when IPM has tripped.)

IPM trip (IPM current or temperature)

verter for compressor is unusual. (DC compressor does not

In operate.)

Indoor coil temp. sensor (E1)

Indoor coil temp. sensor (E2)

Indoor coil temp. sensor (E3)

Indoor suction air (room) temp. sensor (TA)

Indoor discharge air temp. sensor (BL)

Compressor discharge sensor (TD)

Outdoor No. 1 coil liquid temp. sensor (C1)

Outdoor air temp. s

Compressor suction port temperature sensor (TS)

High pressure sensor

EEPROM on the outdoor unit PCB is a failure.

Current is not detected when comp. is ON.

n of outdoor units which have different kinds

ge temperature.

ensor (TO)

Priority set remote controller

Non-priority set remote controller

Alarm

message

L02

<L03>

L04

L05

L06

L07

L08

<<L09>>

L10

L17

L18

<<P01>>

<<P09>>

<<P10>>

P12Operation of protective function of fan inverter.

P14

P02

P03

P04

P05

P16

P22

P26

H31

P29

<<F01>>

<<F02>>

<<F03>>

<<F10>>

<<F11>>

F04

F07

F08

F12

F16

F29

F31

H03

Page 81

9. APPENDIX

9-1. 4-Way Air Discharge Semi-Concealed Type (X Type)

 NAME OF PARTS

X type (4-WAY)

Water drain

Ceiling panel (optional)

Air outlet (4 locations)

Air intake grille (air intake)

 CARE AND CLEANING

1. For safety, be sure to turn the air conditioner off and also to disconnect the power before

WARNING

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 Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them

(Indoor unit) 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

CAUTION

parts using very hot water.

2. Some metal edges and the fins 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

Type Period

X 6 months

CAUTION

The air filter collects dust and other particles from the air and should be cleaned at regular intervals as indicated in the table below or when the filter indication ( ) on the display of the remote control unit (wired type) shows that the filter needs cleaning. If the filter gets blocked, the efficiency of the air conditioner drops greatly.

NOTE

The frequency with which the filter should be cleaned depends on the environment in which the unit is used.

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 fil-

ter in lukewarm, soapy water, rinse it in clean water, and dry it.

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 filter, 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 filter 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.

Page 82

4. Remove the air filter attached to the air intake grille.

Latch

Air intake grille

Bolt screws

Safety chain

Air filter

1. Certain metal edges and the condenser fins are sharp and may cause injury if handled

CAUTION

improperly; special care should be taken when you clean these parts.

2. Periodically check the outdoor unit to see if the air outlet or air intake is clogged with dirt or soot.

3. The internal coil and other components of the outdoor unit must also be cleaned periodically. Consult your dealer or service center.

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

• 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 filter and replace it in its original position.

• Outdoor unit internal components must be checked and cleaned periodically. Contact your local dealer for this service.

 TROUBLESHOOTING

If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or a service center.

Tro uble

Air conditioner does not run at all 1. Power failure. 1.

2. Leakage circuit breaker has

3. Li ne voltage is too low.

4. Operation button is turned off.

5. The wired remote control unit or malfunctioning.

(

The inspection mark and the

H, L, P in

the LCD of the wired

Compressor runs but soon stops 1. Obstruction in front of condenser coil 1. Remove obstruction

oor cooling (or heating)

performance

1. Dirty or clogged air filter.

2. Heat source or many people in

3. Doors and/or windows are open.

4. Obstacle near air intake or air

5. Thermostat is set too high for (or too low for heating).

6. (Defrosting system does not work.)

Possible Cause

tripped.

heat pump is

letters E, F,

combination with numbers

remote control unit.)

room.

discharge port.

cooling

appear

Remedy

After a power outage, press ON/ OFF operation button

on the

2. Contact service center.

3. Co nsult your electrician or dealer.

4. Press the button again.

5. Consult your dealer.

1. Clean air filter to improve the

2. Eliminate heat source if possible.

3. Shut them to keep the heat (or

4. Remove it to ensure good airflow.

5. Set the temperature lower (or

6. (Consult your dealer.)

wired remote control unit.

airflow.

cold) out.

higher).

 Tips for Energy Saving

Avoid

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 interrupted.

• 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.

• Always try to keep the air filter clean. (Refer to “Care and Cleaning.”) A clogged filter

will impair the performance of the unit.

• To prevent conditioned air from escaping, keep windows, doors and any other openings closed.

Page 83

9-2. 1-Way Air Discharge Semi-Concealed Type (A Type)

 NAME OF PARTS

SEMI-CONCEALED

A type (1-WAY)

Wa ter d rain

Air outlet

Air intake

Ceiling panel (optional)

 CARE AND CLEANING

1. For safety, be sure to turn the air conditioner off and also to disconnect the power

WARNING

Air intake and outlet side Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them

(Indoor unit) with a clean, soft cloth.

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.

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

CAUTION

plastic parts using very hot water.

2. Some metal edges and the fins 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

Type A

Period 2 weeks

NOTE

The frequency with which the filter should be cleaned depends on the environment in which the unit is used.

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.

<How to remove the filter> 1-way air discharge semi-concealed type (A):

1. Take hold of the finger-hold on the air intake grille and press it to

the rear, and the grille will open downward.

2. Take hold of the finger-hold on the air filter, pull it toward you.

Air filter finger-hold

Air intake grill

Air filter

Slide

Latch

Air filter finger-hold

*Take hold of the finger-hold on the air filter, pull it toward you.

Hook

Screw

Page 84

Outdoor unit

CAUTION

1. Certain metal edges and the condenser fins are sharp and may cause injury if handled improperly; special care should be taken when you clean these parts.

2. Periodically check the outdoor unit to see if the air outlet or air intake is clogged with dirt or soot.

3. The internal coil and other components of the outdoor unit must also be cleaned periodically. Consult your dealer or service center.

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

 TROUBLESHOOTING

If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or a service center.

Tro uble

Air conditioner does not run at all 1. Power failure. 1.

2. Leakage circuit breaker has

3. Li ne voltage is too low.

4. Operation button is turned off.

5. The wired remote control unit or

Compressor runs but soon stops 1. Obstruction in front of condenser coil 1. Remove obstruction

oor cooling (or heating)

performance

1. Dirty or clogged air filter.

2. Heat source or many people in

3. Doors and/or windows are open.

4. Obstacle near air intake or air

5. Thermostat is set too high for

6. (Defrosting system does not work.)

• 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 filter and replace it in its original position.

• Outdoor unit internal components must be checked and cleaned periodically. Contact your local dealer for this service.

Possible Cause

tripped.

malfunctioning. (

The inspection mark and the

H, L, P in

(or too low for heating).

combination with numbers

the LCD of the wired

remote control unit.)

heat pump is

letters E, F,

appear

room.

discharge port.

cooling

After a power outage, press ON/ OFF operation button

on the

2. Contact service center.

3. Co nsult your electrician or dealer.

4. Press the button again.

5. Consult your dealer.

1. Clean air filter to improve the

2. Eliminate heat source if possible.

3. Shut them to keep the heat (or

4. Remove it to ensure good airflow.

5. Set the temperature lower (or

6. (Consult your dealer.)

wired remote control unit.

Remedy

airflow.

cold) out.

higher).

 Tips for Energy Saving

Avoid

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 interrupted.

• 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.

• Always try to keep the air filter clean. (Refer to “Care and Cleaning.”) A clogged filter

will impair the performance of the unit.

• To prevent conditioned air from escaping, keep windows, doors and any other openings closed.

Page 85

9-3. Concealed Duct (High-Static Pressure) Type (U, D Type)

 NAME OF PARTS

CONCEALED DUCT

U type (standard static pressure

Air outlet grille (optional)

)

D type (high static pressure)

Flexible duct (optional)

Water drain

Canvas duct (optional)

Air intake grille (air intake) (optional)

CONCEALED DUCT

Air intake sideduct flange (rear)

Water drain

Electrical box

Air outlet side duct flange

 CARE AND CLEANING

1. For safety, be sure to turn the air conditioner off and also to disconnect the power before

WARNING

Air intake and outlet side Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them

(Indoor unit) with a clean, soft cloth.

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.

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

CAUTION

parts using very hot water.

2. Some metal edges and the fins 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.

Type Period

U, D* (Depends on filter

specifications)

*Concealed duct type (U, D):

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 filter should be cleaned depends on the environment in which the unit is used.

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.

Page 86

 TROUBLESHOOTING

If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or a service center.

Tro uble

Air conditioner does not run at all 1. Power failure. 1.

2. Leakage circuit breaker has

3. Li ne voltage is too low.

4. Operation button is turned off.

5. The wired remote control unit or malfunctioning.

(

The inspection mark and the

H, L, P in

the LCD of the wired

Compressor runs but soon stops 1. Obstruction in front of condenser coil 1. Remove obstruction

oor cooling (or heating)

performance

1. Dirty or clogged air filter.

2. Heat source or many people in

3. Doors and/or windows are open.

4. Obstacle near air intake or air

5. Thermostat is set too high for (or too low for heating).

6. (Defrosting system does not work.)

Possible Cause

tripped.

heat pump is

letters E, F,

combination with numbers

remote control unit.)

room.

discharge port.

cooling

appear

Remedy

After a power outage, press ON/ OFF operation button

on the

2. Contact service center.

3. Co nsult your electrician or dealer.

4. Press the button again.

5. Consult your dealer.

1. Clean air filter to improve the

2. Eliminate heat source if possible.

3. Shut them to keep the heat (or

4. Remove it to ensure good airflow.

5. Set the temperature lower (or

6. (Consult your dealer.)

wired remote control unit.

airflow.

cold) out.

higher).

 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.

NOTE

• Always try to keep the air filter clean. (Refer to “Care and Cleaning.”) A clogged filter

will impair the performance of the unit.

• To prevent conditioned air from escaping, keep windows, doors and any other openings closed.

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 interrupted.

Page 87

9-4. Ceiling-Mounted Type (T Type)

 NAME OF PARTS

T ty

CEILING-MOUNTED

Air outlet

Water drain

(Drain pipe can be connected to either the left or right side.)

Air intake grille (air intake)

 CARE AND CLEANING

WARNING

Air intake and outlet side Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them

(Indoor unit) with a clean, soft cloth.

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.

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 fins 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

Type Period

T 2 weeks

NOTE

The frequency with which the filter should be cleaned depends on the environment in which the unit is used.

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.

1. Take hold of the finger-hold

on the air intake grille and press it to the rear, and the grille will open downward.

2. Take hold of the finger-hold

on the air filter, pull it toward you.

Air intake grill finger-hold

Air filter finger-hold * Take hold of the finger-hold on the air filter, pull it toward you.

Screw

Air filter

Hook

Latch

Air filter finger-hold

Air intake grill

Slide

Screw

Page 88

CAUTION

1. Certain metal edges and the condenser fins are sharp and may cause injury if handled improperly; special care should be taken when you clean these parts.

2. Periodically check the outdoor unit to see if the air outlet or air intake is clogged with dirt or soot.

3. The internal coil and other components of the outdoor unit must also be cleaned periodically. Consult your dealer or service center.

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

• 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 filter and replace it in its original position.

• Outdoor unit internal components must be checked and cleaned periodically. Contact your local dealer for this service.

 TROUBLESHOOTING

If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or a service center.

Tro uble

Air conditioner does not run at all 1. Power failure. 1.

2. Leakage circuit breaker has

Compressor runs but soon stops 1. Obstruction in front of condenser coil 1. Remove obstruction

oor cooling (or heating)

performance

3. Li ne voltage is too low.

4. Operation button is turned off.

5. The wired remote control unit or malfunctioning.

(

The inspection mark and the

H, L, P in

the LCD of the wired

1. Dirty or clogged air filter.

2. Heat source or many people in

3. Doors and/or windows are open.

4. Obstacle near air intake or air

5. Thermostat is set too high for (or too low for heating).

6. (Defrosting system does not work.)

Possible Cause

tripped.

heat pump is

letters E, F,

combination with numbers

remote control unit.)

room.

discharge port.

cooling

appear

Remedy

After a power outage, press ON/ OFF operation button

on the

2. Contact service center.

3. Co nsult your electrician or dealer.

4. Press the button again.

5. Consult your dealer.

1. Clean air filter to improve the

2. Eliminate heat source if possible.

3. Shut them to keep the heat (or

4. Remove it to ensure good airflow.

5. Set the temperature lower (or

6. (Consult your dealer.)

wired remote control unit.

airflow.

cold) out.

higher).

 Tips for Energy Saving

Avoid

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 interrupted.

• 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.

• Always try to keep the air filter clean. (Refer to “Care and Cleaning.”) A clogged filter

will impair the performance of the unit.

• To prevent conditioned air from escaping, keep windows, doors and any other openings closed.

Page 89

9-5. Wall-Mounted Type (K Type)

 NAME OF PARTS

K Type (Wall-Mounted)

 CARE AND CLEANING

Air intake

Air outlet

WARNING

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 Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them

(Indoor unit) 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

CAUTION

parts using very hot water.

2. Some meta l edges and the fins 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

Type Period

K 2 weeks

NOTE

The frequency with which the filter should be cleaned depends on the environment in which the unit is used.

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.

1. Move the flap on the air outlet grille to its lowest position with the remote control unit.

2. The filter is disengaged by pushing the tab up gently. Hold the air filter by the tab at the bottom,

and pull downward.

Air intake grille

Air filter

When replacing the filter, make sure that the FRONT mark is facing you. Push it up until you hear it click back into position.

Page 90

CAUTION

1. Certain metal edges and the condenser fins are sharp and may cause injury if handled improperly; special care should be taken when you clean these parts.

2. Periodically check the outdoor unit to see if the air outlet or air intake is clogged with dirt or soot.

3. The internal coil and other components of the outdoor unit must also be cleaned periodically. Consult your dealer or service center.

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

• 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 filter and replace it in its original position.

• Outdoor unit internal components must be checked and cleaned periodically. Contact your local dealer for this service.

 TROUBLESHOOTING

If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or a service center.

Possible Cause

tripped.

heat pump is

letters E, F,

combination with numbers

remote control unit.)

room.

discharge port.

cooling

appear

Remedy

After a power outage, press ON/ OFF operation button

on the

2. Contact service center.

3. Co nsult your electrician or dealer.

4. Press the button again.

5. Consult your dealer.

1. Clean air filter to improve the

2. Eliminate heat source if possible.

3. Shut them to keep the heat (or

4. Remove it to ensure good airflow.

5. Set the temperature lower (or

6. (Consult your dealer.)

wired remote control unit.

airflow.

cold) out.

higher).

Tro uble

Air conditioner does not run at all 1. Power failure. 1.

2. Leakage circuit breaker has

3. Li ne voltage is too low.

4. Operation button is turned off.

5. The wired remote control unit or malfunctioning.

(

The inspection mark and the

H, L, P in

the LCD of the wired

Compressor runs but soon stops 1. Obstruction in front of condenser coil 1. Remove obstruction

oor cooling (or heating)

performance

1. Dirty or clogged air filter.

2. Heat source or many people in

3. Doors and/or windows are open.

4. Obstacle near air intake or air

5. Thermostat is set too high for (or too low for heating).

6. (Defrosting system does not work.)

 Tips for Energy Saving

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 interrupted.

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.

• Always try to keep the air filter clean. (Refer to “Care and Cleaning.”) A clogged filter will impair the performance of the unit.

• To prevent conditioned air from escaping, keep windows, doors and any other openings closed.

Sanyo AHX0952 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual