ac carrier.pdf

8/14/2019 AC Carrier.pdf

1/114R410A

FILE NO. SVM-10019

Indoor Unit Outdoor Unit

RAS-09LKV-UL RAS-09LAV-UL

RAS-12LKV-UL RAS-12LAV-UL


2/114

CONTENTS

1. SAFETY PRECAUTIONS .......................................................................... 3

2. SPECIFICATIONS ..................................................................................... 6

3. REFRIGERANT R410A ............................................................................. 8

4. CONSTRUCTION VIEWS ........................................................................ 16

5. WIRING DIAGRAM .................................................................................. 18

6. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 20

7. REFRIGERANT CYCLE DIAGRAM ........................................................ 21

8. CONTROL BLOCK DIAGRAM ................................................................ 24

9. OPERATION DESCRIPTION................................................................... 26

10. INSTALLATION PROCEDURE ................................................................ 51

11. HOW TO DIAGNOSE THE TROUBLE ...................................................... 66

12. HOW TO REPLACE THE MAIN PARTS................................................... 93

13. EXPLODED VIEWS AND PARTS LIST ................................................. 109

FILE NO. SVM-10019


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1. SAFETY PRECAUTIONS

Installing, staring up, and servicing air-conditioning equipment can be hazardous due to system pressures, electrical

components, and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics should install, start-up, and service this equipment.

Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should be

performed by trained service personnel.

When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the

equipment.

Follow all safety codes, Wear safety glasses and work gloves. Keep quenching cloth and fire extinguisher near by

when brazing. Use care in handling, rigging, and setting bulky equipment.

Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit.

Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety information.

This is the safety-alert symbol ! . When you see this symbol on the unit and in instructions or manuals, be alert to the

potential for personal injury. Understand these signal words : DANGER, WARNING, and CAUTION. These words are

used with the safety-alert symbol.

DANGER identifies the most serious hazards which will result in severs personal injury or death. WARNING signifies

hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result

in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in

enhanced installation, reliability, or operation.

Before installation, please read these precautions for safety carefully.

Be sure to follow the precautions provided here to avoid safety risks. The symbols and their meanings are shown below.

WARNING: It indicates that incorrect use of this unit may cause severe injury or death.

CAUTION : FAILURE TO FOLLOW THIS CAUTION may result in equipment damage or improper operation and

personal injury.

CAUTION

New refrigerant air conditioner installation

THIS AIR CONDITIONER USES THE NEW HFC REFRIGERANT (R410A), WHICH DOES NOT DESTROY THE

OZONE LAYER.

R410A refrigerant is affected by inpurities such as water and oils because the pressure of R410A refrigerant is approx.

1.6 times of refrigerant R22.

ALSO NEW OILS ARE USED WITH R410A, THUS ALWAYS USE NEW REFRIGERANT PIPING AND DO NOT

ALLOW MOISTURE OR DUST TO ENTER THE SYSTEM.

To avoid mixing refrigerant and refrigerant machine oil, the sizes of charging port on the main unit is different than

those used on R22 machines and different tools will be required.

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

Do not bury more than 36 in. (914 mm) of refrigerant pipe in the ground. If any section of pipe is buried, there must be a 6 in. (152 mm) vertical rise to the valve connections on the outdoor units. If more than the recommended length

is buried, refrigerant may migrate to the cooter buried section during extended periods of system shutdown. This

causes refrigerant slugging and could possibly damage the compressor at start-up.

FILE NO. SVM-10019


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DANGER

FOR USE BY QUALIFIED PERSONS ONLY.

TURN OFF MAIN POWER SUPPLY BEFORE.ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE ALL POWER

SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED WRONGLY,

ELECTRIC PARTS MAY BE DAMAGED.

CHECK THE EARTH WIRE THAT IT IS NOT BROKEN OR DISCONNECTED BEFORE INSTALLATION. DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS.

FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.

TO PREVENT OVERHEATION THE INDOOR UNIT AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY

(MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEATERS, FURNACE, STOVES, ETC.

WHEN MOVING THE AIR CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY CAREFUL NOT

TO GET THE SPECIFIED REFRIGERANT (R410A) WITH ANY OTHER GASEOUS BODY INTO THE REFRIGERATION

CYCLE. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION

CYCLE BECOMES ABNORMALLY HIGH AND IT RESULTINGLY CAUSES BURST OF THE PIPE AND INJURIES ON

PERSONS.

IN THE EVENT THAT THE REFRIGERANT LEAK, DURING INSTALLATION WORK, IMMEDIATELY ALLOW FRESH AIR

INTO THE ROOM. IF THE REFRIGERANT GAS IS HEATED BY FIRE OR SOMETHING ELSE, IT CAUSE GENERATION

OF POISONOUS GAS.

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Before installing, modifying, or servicing system, main electrical disconnect switch must be in the OFF position. There may

be more than 1 disconnect switch. Lock out and tag switch with a suitable warning label.

Never modify this unit by removing any of the safety guards or bypassing any of the safety interlock switches.

Installation work must be purformed by qualified personnel only.

Specified tools and pipe parts for model R410A are required, and installation work must be done in accordance with the

manual. HFC type refrigerant R410A has 1.6 times more pressure than that of conventional refrigerant (R22). Use the

specified pipe parts, and ensure correct installation, otherwise damage and/or injury may be caused. At the same time,

water leakage, electrical shock, and fire may occur.

Be sure to install the unit in a place which can sufficiently bear its weight. If the load bearing of the unit is not enough, or installation of the unit is improper, the unit may fall and result in injury.

Electrical work must be performed by trained, qualified installers and service mechanics inaccordance with the code governing

such installation work, internal wiring regulations, and the manual. A dedicated circuit and the rated voltage must be used.

Insufficient power supply or improper installation may cause electrical shock or fire.

Use a cabtyre cable to connect wires in the indoor/outdoor units. Midway connection is not allowed. Improper connection or

fixing may cause a fire.

Wiring between the indoor unit and outdoor units must be well shaped so that the cover can be firmly placed. Improper

cover installation may cause increased heat, fire, or electrical shock at the terminal area.

Be sure to use only approved accessories or the specified parts. Failure to do so may cause the unit to fall, water leakage,

fire or electrical shock.

After the installation work. ensure that there is no leakage of refrigerant gas. If the refrigerant gas leaks out of the pipe into

the room and is heated by fire or something else from a fanheater, stove or gas range, it causes generation of poisonous gas.

Make sure the equipment is properly grounded. Do not connect the ground wire to a gas pipe, water pipe, lightning

conductor, or telephone earth wire. Improper earth work may be the cause of electrical shock.

Do not install the unit where flammable gas may leak. If there is any gas leakage or accumulation around the unit, it can

cause a fire.

Do not select a location for installation where there may be excessive water or humidity, such as a bathroom. Deterioration

of insulation nay cause electrical shock or fire.

Installation work must be performed following the instructions in this installation manual. Improper installation may cause

water leakage, electrical shock or fire. Check the following items before operating the unit.

- Be sure that the pipe connection is well placed and there are no leaks.

- Check that the service valve is open. If the service valve is closed, it may cause overpressure and result in compressor

damage. At the same time, if there is a leak in the connection part, it may cause air suction and overpressure, resulting

in damage to the unit or injury.

In a pump-down operation, be sure to stop the compressor unit before removing the refrigerant pipe. If removing the

refrigerant pipe while the compressor is operating with the service valve opened, it may cause air suction and overpressure,

resulting in damage to the unit or injury. Do not modity the power cable, connect the cable midway, or use a multiple outlet extension cable. Doing so may cause

contact failure, insulation failure, or excess current, resulting in fire or electrical shock.

If you detect any damage, do not install the unit. Contact your dealer immediately.

FILE NO. SVM-10019


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CAUTIONCAUTION

Exposure of unit to water or other moisture before installation could result in electric shock. Do not store it in a wet

basement or expose to rain or water.

After unpacking the unit, examine it carefully for possible damage. Report any damages to your distributor.

Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify

the noise level of the unit or where noise and discharged air might disturb neighbors.

Please read this installation manual carefully before installing the unit. It contains further important instructions

for proper installation.

This appliance must be connected to the main power supply by means of a circuit breaker depending on the

place where the unit is installed. Failure to do so may cause electrical shock.

Follow the instructions in this installation manual to arrange the drain pipe for proper drainage from the unit.

Ensure that drained water is discharged. Improper drainage can result is water leakage, causing water damage

to furniture.

Tighten the flare nut with a torque wrench using the prescribed method. Do not apply excess torque. Otherwise,

the nut may crack after a long period of usage and it may cause the leakage of refrigerant.

Wear gloves (heavy gloves such as cotton gloves) for installation work. Failure to do so may cause personal

injury when handling parts with sharp edges.

Do not touch the air intake section or the aluminum fins of the outdoor unit. It may cause injury. Do not install the outdoor unit in a place which can be a nest for small animals. Small animals could enter and

contact internal electrical parts, causing a failure or fire.

Request the user to keep the place around the unit tidy and clean.

Make sure to conduct a trial operation after the installation work, and explain how to use and maintain the unit

to the customer in accordance with the manual. Ask the customer to keep the operation manual along with the

installation manual.

FILE NO. SVM-10019


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FILE NO. SVM-10019

Unit model Indoor RAS-09LKV-UL RAS-12LKV-UL

Outdoor RAS-09LAV-UL RAS-12LAV-UL

Cooling capacity (Btu/h) 9000 12000

Cooling capacity range (Btu/h) 3750 -10580 2750 - 13950Heating capacity (Btu/h) 10800 14200

Heating capacity range (Btu/h) 3070 - 16350 3070 - 19000

Power supply

Electric Indoor Operation mode Cooling Heating Cooling Heating

characteristic Running current (A) 0.22 0.20 0.25 0.23

Power consumption (W) 35 40 30 35

Power factor (%) 76 76 66 66

Outdoor Operation mode Cooling Heating Cooling Heating

Running current (A) 3.46 3.13 5.26 4.76

Power consumption (W) 655 760 920 1055

Power factor (%) 91 94 95 95

Starting current (A) 3.68 3.33 4.81/4.35 5.51/4.99

EER (Cooling/Heating) (Btu/W.h) 13.0/13.5 12.6 / 13.0

SEER (Btu/W.h) / HSPF (w/w)

Operating Indoor High (Cooling/Heating) (dB-A) 39/40 45/46

noise Medium (Cooling/Heating) (dB-A) 34/35 40/41

Low (Cooling/Heating) (dB-A) 27/29 30/32

Outdoor (Cooling/Heating) (dB-A) 47/47 50/50

Indoor unit Unit model RAS-09LKV-UL RAS-12LKV-UL

Dimension Height in. (mm) 10-25/32 (275) 10-25/32 (275)

Width in. (mm) 31-1/8 (790) 31-1/8 (790)

Depth in. (mm) 8-1/16 (205) 8-1/16 (205)

Net weight lbs (kg) 20 (9) 20 (9)

Fan motor output (W) 20 30

Air flow rate (Cooling/Heating) cfm (m3/min) 303/335 (8.6)/(9.5) 406/438 (11.5/12.4)

Outdoor unit Unit model RAS-09LAV-UL RAS-12LAV-UL

Dimension Height in. (mm) 21-11/16 (550) 21-11/16 (550)Width in. (mm) 30-11/16 (780) 30-11/16 (780)

Depth in. (mm) 11-7/16 (290) 11-7/16 (290)

Net weight lbs (kg) 75 (34) 88 (39)

Compressor Motor output (w) 750 750

Type

Model DA89X1C-23FZ2 DA111A1F-20F1

Fan motor output (W) 43 43

Air flow rate (Cooling/Heating) cfm (m3/min) 1060/1060 (30)/(30) 1395/1236 (39.5/35.0)

Piping Type Flare connection Flare connection

connection Indoor unit Liquid side in. (mm) 1/4 (6.35) 1/4 (6.35)

Gas side in. (mm) 3/8 (9.92) 3/8 (9.92)

Outdoor unit Liquid side in. (mm) 1/4 (6.35) 1/4 (6.35)

Gas side in. (mm) 3/8 (9.92) 3/8 (9.92)Maximum length ft. (m)

Maximum chargeless length ft. (m) 50 (15) 50 (15)

Maximum height difference ft. (m) 33 (10) 33 (10)

Refrigerant Name of refrigerant R410A R410A

Weight lbs (kg) 1.77 (0.8) 2.43 (1.10)

Wiring Power supply

connection Interconnection 4Wires:includes earth 4Wires:includes earth

Usable temperature range Indoor (Cooling/Heating) F (C) 70-90 / 32-82 (21-32/0-28) 70-90 / 32-82 (21-32/0-28)

Outdoor (Cooling/Heating) F (C) 14-115 / 5-75 (-10-46/-15-24) 14-115 / 5-75 (-10-46/-15-24)

* The specifications may be subject to change without notice for purpose of improvement.

20.0/10.0

66 (20)

23.0/9.5

66 (20)

Single rotary type with DC-inverter

variablespeed control

Twin rotary type with DC-inverter

variablespeed control

1Ph, 60Hz, 208V/230V 1Ph, 60Hz, 208V/230V

3Wires:includes earth (Outdoor) 3Wires:includes earth (Outdoor)

2. SPECIFICATIONS


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120

100

80

60

40

20

0

100

95

90

85

80

75

70

65

60

55

50

105

90 91 93 95 97 99 100 102 104 106108109 111 113115

CapacityRatio

(%)

CapacityRatio

(%)

Capacity Ratio: 100% =9000 Btu/h (RAS-09LKV-UL)12000 Btu/h (RAS-12LKV-UL)

RAS-09LKV-ULRAS-12LKV-UL

2-2. Operation Characteristic Curve

2-3. Capacity Variation Ratio According to Temperature

ConditionIndoor: DB70F/WB60F

Indoor Air-Flow Volume: HighPipe Length: 16 ft (5m)

Capacity Ratio: 100% =9000 Btu/h (RAS-09LKV-UL)12000 Btu/h (RAS-12LKV-UL)

(DB21.1C/WB15.6C)

FILE NO. SVM-10019

0

1

2

3

4

5

6

7

8

0 10 20 30 40 50 60 70 80 90 100 110 120

Compressor Speed (rps)

Current(A)

0

1

2

3

4

5

6

7

8

0 10 20 30 40 50 60 70 80 90 100 110 12

Compressor Speed (rps)

Current(A)

Conditions

Indoor:DB80oF/WB67

oF

(DB26.7oC/WB19.4

oC)

Outdoor:DB98oF/WB75

oF

(DB35oC/WB23.9

oC)

IndoorAirFlow:High

PipLength:5m

Voltage:230V

Conditions

Indoor:DB70oF/WB60

oF

(DB21.1oC/WB15.6

oC)

Outdoor:DB47oF/WB43

oF

(DB8.3oC/WB6.1

oC)

IndoorAirFlow:High

PipLength:5m

Voltage:230V

RAS-09LKV-UL

RAS-12LKV-UL

RAS-12LKV-UL

RAS-09LKV-UL

RAS-09LKV-ULRAS-12LKV-UL

Voltage : 230V

ConditionIndoor: DB80F/WB67F

Indoor Air-Flow Volume: HighPipe Length: 16 ft (5m)

(DB26.7C/WB19.4C)

Voltage : 230V

Outdoor Temperature (C)

(32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)(45)(46)

Outdoor Temperature (C)

5 14 23 32 41 50(-15) (-10) (-5) (0) (5) (10)


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3. REFRIGERANT R410A

This air conditioner adopts the new refrigerant HFC(R410A) which does not damage the ozone layer.

The working pressure of the new refrigerant R410Ais 1.6 times higher than conventional refrigerant(R22). The refrigerating oil is also changed inaccordance with change of refrigerant, so be carefulthat water, dust, and existing refrigerant or refrigerat-ing oil are not entered in the refrigerant cycle of theair conditioner using the new refrigerant duringinstallation work or servicing time.

The next section describes the precautions for airconditioner using the new refrigerant. Conforming tocontents of the next section together with thegeneral cautions included in this manual, performthe correct and safe work.

3-1. Safety During Installation/ServicingAs R410As pressure is about 1.6 times higher thanthat of R22, improper installation/servicing maycause a serious trouble. By using tools and materi-als exclusive for R410A, it is necessary to carry outinstallation/servicing safely while taking the followingprecautions into consideration.

1. Never use refrigerant other than R410A in an airconditioner which is designed to operate withR410A.

If other refrigerant than R410A is mixed, pressure

in the refrigeration cycle becomes abnormallyhigh, and it may cause personal injury, etc. by arupture.

2. Confirm the used refrigerant name, and use toolsand materials exclusive for the refrigerant R410A.

The refrigerant name R410A is indicated on thevisible place of the outdoor unit of the air condi-tioner using R410A as refrigerant. To preventmischarging, the diameter of the service portdiffers from that of R22.

3. If a refrigeration gas leakage occurs duringinstallation/servicing, be sure to ventilate fully.

If the refrigerant gas comes into contact with fire,a poisonous gas may occur.

4. When installing or removing an air conditioner, donot allow air or moisture to remain in the refrig-eration cycle. Otherwise, pressure in the refrig-eration cycle may become abnormally high sothat a rupture or personal injury may be caused.

5. After completion of installation work, check tomake sure that there is no refrigeration gasleakage.

If the refrigerant gas leaks into the room, cominginto contact with fire in the fan-driven heater,space heater, etc., a poisonous gas may occur.

6. When an air conditioning system charged with alarge volume of refrigerant is installed in a smallroom, it is necessary to exercise care so that,even when refrigerant leaks, its concentrationdoes not exceed the marginal level.

If the refrigerant gas leakage occurs and itsconcentration exceeds the marginal level, anoxygen starvation accident may result.

7. Be sure to carry out installation or removalaccording to the installation manual.

Improper installation may cause refrigerationtrouble, water leakage, electric shock, fire, etc.

8. Unauthorized modifications to the air conditionermay be dangerous. If a breakdown occursplease call a qualified air conditioner technicianor electrician.

Improper repairs may result in water leakage,electric shock and fire, etc.

3-2. Refrigerant Piping Installation

3-2-1. Piping Materials and Joints Used

For the refrigerant piping installation, copper pipesand joints are mainly used. Copper pipes and jointssuitable for the refrigerant must be chosen andinstalled. Furthermore, it is necessary to use cleancopper pipes and joints whose interior surfaces areless affected by contaminants.

1. Copper Pipes

It is necessary to use seamless copper pipeswhich are made of either copper or copper alloyand it is desirable that the amount of residual oilis less than 40 mg/10 m. Do not use copperpipes having a collapsed, deformed or discoloredportion (especially on the interior surface).

Otherwise, the expansion valve or capillary tubemay become blocked with contaminants.

As an air conditioner using R410A incurs pres-sure higher than when using R22, it is necessary

to choose adequate materials.

Thicknesses of copper pipes used with R410Aare as shown in Table 3-2-1. Never use copperpipes thinner than 0.0315 in. (0.8 mm) even whenit is available on the market.

FILE NO. SVM-10019


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Table 3-2-1 Thicknesses of annealed copper pipes

Nominal diameter(in.)

1/4

3/8

1/2

Outer diameter (mm)

6.35

9.52

12.70

Thickness in. (mm)

R410A R22

0.0315 (0.80) 0.0315(0.80)

0.0315(0.80)

2. Joints

For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants.

a) Flare Joints

Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds

20 mm. In such a case, socket joints can be used.

Sizes of flare pipe ends, flare joint ends and flare nuts are as shown in Tables 3-2-3 to 3-2-6 below.

b) Socket Joints

Socket joints are such that they are brazed for connections, and used mainly for thick pipings whose

diameter is larger than 0.7874in. (20 mm).

Thicknesses of socket joints are as shown in Table 3-2-2.

Table 3-2-2 Minimum th icknesses of socket joints

Nominal diameter(in)

1/4

3/8

1/2

Reference outer diameter ofcopper pipe jointed (mm)

6.35

9.52

12.70

Minimum joint thicknessin. (mm)

0.0197(0.50)

0.0236(0.60)

0.0276(0.70)

3-2-2. Processing of Piping Materials

When performing the refrigerant piping installation, care should be taken to ensure that water or dust does not

enter the pipe interior, that no other oil than lubricating oils used in the installed air-water heat pump is used,

and that refrigerant does not leak. When using lubricating oils in the piping processing, use such lubricating oils

whose water content has been removed. When stored, be sure to seal the container with an airtight cap or any

other cover.

1. Flare processing procedures and precautions

a) Cutting the Pipe

By means of a pipe cutter, slowly cut the pipe so that it is not deformed.

b) Removing Burrs and Chips

If the flared section has chips or burrs, refrigerant leakage may occur.

Carefully remove all burrs and clean the cut surface before installation.

c) Insertion of Flare Nut

0.0315(0.80)

0.0315(0.80)0.0315(0.80)

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AD

d) Flare Processing

Make certain that a clamp bar and copperpipe have been cleaned.

By means of the clamp bar, perform the flareprocessing correctly.

Use either a flare tool for R410A or conven-tional flare tool.

Flare processing dimensions differ accordingto the type of flare tool. When using a con-ventional flare tool, be sure to secure dimen-sion A by using a gauge for size adjustment. Fig. 3-2-1 Flare processing dimensions

Table 3-2-3 Dimensions related to flare processing for R410A

Nominal

diameter

1/4

3/8

1/2

Outerdiameter

(mm)

6.35

9.52

12.70

Thickness

in. (mm)

0.0315 (0.8)

0.0315 (0.8)

0.0315 (0.8)

A in. (mm)

Flare tool for R410A

clutch type

0 to 0.0197 (0 to 0.5)

0 to 0.0197 (0 to 0.5)

0 to 0.0197 (0 to 0.5)

Conventional flare tool

Clutch type Wing nut type

0.0394 to 0.0591(1.0 to 1.5)

0.0394 to 0.0591(1.0 to 1.5)

0.0394 to 0.0591(1.0 to 1.5)

0.0591 to 0.0787(1.5 to 2.0)

0.0591 to 0.0787(1.5 to 2.0)

0.07874 to 0.0984(2.0 to 2.5)

Nominaldiameter

1/4

3/8

1/2

Outerdiameter

(mm)

6.35

9.52

12.70

Thicknessin. (mm)

0.0315 (0.8)

0.0315 (0.8)

0.0315 (0.8)

A in. (mm)

Flare tool for R22

clutch type

0 to 0.0197 (0 to 0.5)

0 to 0.0197 (0 to 0.5)

0 to 0.0197 (0 to 0.5)

Conventional flare tool

Clutch type Wing nut type

0.0197 to 0.0394(0.5 to 1.0)

0.0394 to 0.0591(1.0 to 1.5)

0.0197 to 0.0394(0.5 to 1.0)

0.0394 to 0.0591(1.0 to 1.5)

0.0197 to 0.0394

(0.5 to 1.0)

0.0591 to 0.0787

(1.5 to 2.0)

Table 3-2-4 Dimensions related to flare processingf or R22

Table 3-2-5 Flare and flare nut dimensions for R410A

Nominaldiameter

1/4

3/8

1/2

Outer diameter

(mm)

6.35

9.52

12.70

Thickness

in. (mm)

0.0315(0.8)

Dimension in. (mm)

A B C D

0.358(9.1) 0.362(9.2) 0.256(6.5) 0.512(13)

0.520(13.2) 0.531(13.5) 0.382(9.7) 0.787(20)

0.630(16.0) 0.508(12.9)

Flare nut width

in. (mm)

0.669(17)

0.866(22)

1.024(26)

0.0315(0.8)

0.0315(0.8) 0.653(16.6) 0.906(23)

FILE NO. SVM-10019

in.

in.

in.


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43 to45

45to4

6

B A C D

Table 3-2-6 Flare and flare nut dimensions for R22

Fig. 3-2-2 Relations between flare nut and flare seal surface

2. Flare Connecting Procedures and Precautionsa) Make sure that the flare and union portions do not have any scar or dust, etc.

b) Correctly align the processed flare surface with the union axis.

c) Tighten the flare with designated torque by means of a torque wrench. The tightening torque for R410A isthe same as that for conventional R22. Incidentally, when the torque is weak, the gas leakage may occur.

When it is strong, the flare nut may crack and may be made non-removable. When choosing the tighten-ing torque, comply with values designated by manufacturers. Table 3-2-7 shows reference values.

NOTE :

When applying oil to the flare surface, be sure to use oil designated by the manufacturer.

If any other oil is used, the lubricating oils may deteriorate and cause the compressor to burn out.

Table 3-2-7 Tightening torque of flare for R410A [Reference values]

Nominaldiameter

1/4

3/8

1/2

Outer diameter(mm)

6.35

9.52

12.70

Tightening torque

lbf.ft (Nm)

10 to 13 (14 to 18)

24 to 31 (33 to 42)

37 to 46 (50 to 62)

Tightening torque of torquewrenches available on the market

lbf.ft (Nm)

12 (16), 13 (18)

31 (42)

41 (55)

Nominaldiameter

1/4

3/8

1/2

Outer diameter

(mm)

6.35

9.52

12.70

Thickness

in. (mm)

0.0315(0.8)

Dimension in. (mm)

A B C D

0.354(9.0) 0.362(9.2) 0.256(6.5) 0.512(13)

0.512(13.0) 0.531(13.5) 0.382(9.7) 0.787(20)

0.638(16.2)0.508(12.9)

Flare nut width

in. (mm)

0.669(17)

0.866(22)

0.945(24)

0.0315(0.8)

0.0315(0.8) 0.630(16.0) 0.787(20)

FILE NO. SVM-10019

in.

in.


12/114

3-3. Tools

3-3-1. Required Tools

The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A ischanged to prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processingdimensions and opposite side dimension of flare nut (For 1/2 in. 12.7mm) copper pipe) of the refrigerantpiping are lengthened.

The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge,clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.

1. Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))

2. Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)

3. Tools commonly used for R410A and for conventional refrigerant (R22)

The table below shows the tools exclusive for R410A and their interchangeability.

Tools exclusive for R410A (The following tools for R410A are required.)

Tools whose specifications are changed for R410A and their interchangeability

No.

1

2

3

4

5

6

7

8

9

10

Used tool

Flare tool

Copper pipe gauge foradjusting projectionmargin

Torque wrench[(For 1/2 (12.7mm)]

Gauge manifold

Charge hose

Vacuum pump adapter

Electronic balance forrefrigerant charging

Refrigerant cylinder

Leakage detector

Charging cylinder

Usage

Pipe flaring

Flaring byconventional flare tool

Connection of flare nut

Evacuating, refrigerantcharge, run check, etc.

Vacuum evacuating

Refrigerant charge

Refrigerant charge

Gas leakage check

Refrigerant charge

R410A

air-water heat pump installation

Existence ofnew equipmentfor R410A

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

(Note 2)

Whether conven-tional equipmentcan be used

*(Note 1)

*(Note 1)

Conventional air-water

heat pump installation

Whether new equipmentcan be used withconventional refrigerant

*(Note 1)

(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection

margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.

(Note 2) Charging cylinder for R410A is being currently developed.

General tools (Conventional tools can be used.)

In addition to the above exclusive tools, the following equipments which serve also for R22 are necessaryas the general tools.

1. Vacuum pumpUse vacuum pump by attachingvacuum pump adapter.

2. Torque wrench [For 1/4, 3/8 in.

(6.35, 9.52mm)]

4. Reamer

5. Pipe bender

6. Level vial

7. Screwdriver (+, )

8. Spanner or Monkey wrench

9. Hole core drill [2-9/16 in. (65mm)]

10. Hexagon wrench[Opposite side 3/16 in. (4mm)]

11. Tape measure

12. Metal saw

Also prepare the following equipments for other installation method and run check.

1. Clamp meter

2. Thermometer

3. Insulation resistance tester

4. Electroscope

3. Pipe cutter

FILE NO. SVM-10019


13/114

Connect the charge hose to packed valve serviceport at the outdoor units gas side.

Recover the refrigerant, and check no refrigerantremains in the equipment.

(For refrigerant charging, see the figure below.)

Connect the charge hose to the vacuum pumpadapter.

Open fully both packed valves at liquid and gassides.

Place the handle of the gauge manifold Low in thefully opened position, and turn on the vacuum pumpspower switch. Then, evacuating the refrigerant in thecycle.

When the compound gauges pointer has indicated

14.7 Psi (0.1 Mpa) or

29.9 inHg (76 cmHg),

place the handle Low in the fully closed position, andturn off the vacuum pump's power switch.

Keep the status as it is for 1 to 2 minutes, and ensurethat the compound gauges pointer does not return.

Set the refrigerant cylinder to the electronic balance,connect the connecting hose to the cylinder and theconnecting port of the electronic balance, and charge

liquid refrigerant.

(Indoor Unit)(Outdoor unit)

Opened

Opened

Refrigerant cylinder

(with siphon)

Check valve

Open/close

valve forcharging

Electronic balance forrefrigerantcharging

Opened

Closed

Serviceport

3-4. Recharging of Refrigerant

When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to thefollowing steps.

1. Never charge refrigerant exceeding the specified amount.

2. If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bitin COOL mode.

3. Do not carry out additional charging.

When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in therefrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding thespecified amount is charged, and working pressure in the refrigeration cycle becomes abnormally highpressure, and may cause a rupture or personal injury.

Fi 3 4 1 C fi i f f i h i

FILE NO. SVM-10019


14/114

Gauge manifold

[ Cylinder with siphon ] [ Cylinder without siphon ]

OUTDOOR unitGauge manifold

OUTDOOR unit

Refrigerantcylinder

Electronicbalance

Refrigerantcylinder

Electronicbalance

Siphon

1. Be sure to make setting so that liquidcan be charged.

2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.

It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant.Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning thecylinder upside down if cylinder is not equipped with siphon.

R410A refrigerant is HFC mixed refrigerant.Therefore, if it is charged with gas, the composi-tion of the charged refrigerant changes and thecharacteristics of the equipment varies.

3-5. Brazing of Pipes

3-5-1. Materials for Brazing

1. Silver brazing filler

Silver brazing filler is an alloy mainly composed

of silver and copper. It is used to join iron, copperor copper alloy, and is relatively expensive thoughit excels in solderability.

2. Phosphor bronze brazing filler

Phosphor bronze brazing filler is generally usedto join copper or copper alloy.

3. Low temperature brazing filler

Low temperature brazing filler is generally calledsolder, and is an alloy of tin and lead. Since it isweak in adhesive strength, do not use it forrefrigerant pipes.

1. Phosphor bronze brazing filler tends to reactwith sulfur and produce a fragile compoundwater solution, which may cause a gasleakage. Therefore, use any other type ofbrazing filler at a hot spring resort, etc., and

coat the surface with a paint.2. When performing brazing again at time of

servicing, use the same type of brazing filler.

3-5-2. Flux

1. Reason why flux is necessary

By removing the oxide film and any foreignmatter on the metal surface, it assists the flowof brazing filler.

In the brazing process, it prevents the metal

surface from being oxidized.

By reducing the brazing fillers surface tension,the brazing filler adheres better to the treated

Fig. 3-4-2

FILE NO. SVM-10019


15/114

Nitrogen gascylinder

Pipe

Flow meterM

Stop valve

From Nitrogen cylinder

Nitrogengas

Rubber plug

2. Characteristics required for flux

Activated temperature of flux coincides with thebrazing temperature.

Due to a wide effective temperature range, fluxis hard to carbonize.

It is easy to remove slag after brazing.

The corrosive action to the treated metal andbrazing filler is minimum.

It excels in coating performance and is harm-less to the human body.

As the flux works in a complicated manner asdescribed above, it is necessary to select anadequate type of flux according to the type andshape of treated metal, type of brazing filler andbrazing method, etc.

3. Types of flux

Noncorrosive flux

Generally, it is a compound of borax and boricacid.It is effective in case where the brazing tem-perature is higher than 1472F (800C).

Activated flux

Most of fluxes generally used for silver brazingare this type.It features an increased oxide film removingcapability due to the addition of compoundssuch as potassium fluoride, potassium chlorideand sodium fluoride to the borax-boric acidcompound.

4. Piping materials for brazing and usedbrazing filler/flux

1. Do not enter flux into the refrigeration cycle.

2. When chlorine contained in the flux remainswithin the pipe, the lubricating oil deteriorates.Therefore, use a flux which does not containchlorine.

3. When adding water to the flux, use waterwhich does not contain chlorine (e.g. distilledwater or ion-exchange water).

4. Remove the flux after brazing.

3-5-3. Brazing

As brazing work requires sophisticated techniques,experiences based upon a theoretical knowledge, itmust be performed by a person qualified.

In order to prevent the oxide film from occurring inthe pipe interior during brazing, it is effective toproceed with brazing while letting dry Nitrogen gas(N2) flow.

Never use gas other than Nitrogen gas.

1. Brazing method to prevent oxidation

1) Attach a reducing valve and a flow-meter tothe Nitrogen gas cylinder.

2) Use a copper pipe to direct the piping mate-rial, and attach a flow-meter to the cylinder.

3) Apply a seal onto the clearance between the

piping material and inserted copper pipe forNitrogen in order to prevent backflow of theNitrogen gas.

4) When the Nitrogen gas is flowing, be sure tokeep the piping end open.

5) Adjust the flow rate of Nitrogen gas so that itis lower than 0.03 cfm (0.05 m3/Hr) or 2.9 Psi(0.02 MPa) by means of the reducing valve.

6) After performing the steps above, keep theNitrogen gas flowing until the pipe cools downto a certain extent (temperature at whichpipes are touchable with hands).

7) Remove the flux completely after brazing.

Fig. 3-5-1 Prevention of oxidation during brazing

Piping material

Copper - Copper

Copper - Iron

Iron - Iron

Used brazing filler

Phosphor copper

Silver

Silver

Used flux

Do not use

Paste flux

Vapor flux

FILE NO. SVM-10019


16/114

4. CONSTRUCTION VIEWS

4-1. Indoor Unit

FILE NO. SVM-10019


17/114

4-2. Outdoor Unit

10-7/8

(275)

2-23/32 (69)

3-17/32 (90)

3-17/32 (90)

23-5/8 (600)

17-5/32 ( 436) WIRE GUARD

12-19/32

(320)

4-1/4 (108) 4-15/16 (125)

3-3/8

(86)

1 ( 25) Water Drain Outlet

4-9/16

(116)

A

B

13-1/2 (342)

COVERPACKED VALVE

11-7/16 (290)

21-11/16

(550)

View Z

5-9/16

(141)

2-3/32(

53)

3-15/32

(88)

Liquid side(Flare Nut : 1/4 ( 6.35))

Gas side(Model 09,12k Flare Nut : 3/8 ( 9.52))

Service Port

1-27/64 (36)1-31/32 (50)

(R5.5)R7/32

( 6) Hole1/4 Hole

(R15)R19/32

12-19/32

(320)

23-5/8 (600)

12-3/64

(306)

1-27/64 (36)

1-31/32 (50)

R19/32 (R15)( 6)-Hole

1/4-Hole

23-5/8 (600)

7/16x9/16 Oval-Hole ( 11x14) Oval Hole

12-1

9/32

(320)

12-3/64

(306)

Detail-B (Front Leg)

23-5/8 (600)

12-19/32

(320)

3-15/16 Inch or more(100 mm. or more)

23-5/8 Inch or more(600 mm. or more)

Air Inlet

Air Outlet

2-R7/32x43/64L (R5.5x17L) U-Shape(For 5/16~ 13/32 ( 8~ 10) Anchor Bolt)

2- 7/16x9/16 ( 11x14) Oval-Hole (For 5/16~ 13/32 ( 8~ 10) Anchor Bolt)

3-15/16 Or more(100 mm or more)

23-5/8 Or more(600 mm or more)

View Z

Detail-A (Rear Leg)

Unit : Inch (mm)

FILE NO. SVM-10019


18/114

5. WIRING DIAGRAM

5-1. RAS-09LKV-UL / RAS-09LAV-UL

FILE NO. SVM-10019

Outdoor Terminal Block

POWER SUPPLY

Indoor Terminal Block

L1L2 S

L1L2 S

HeatExchanger

BLK

WHI

RED

GRN&YEL

(From Outdoor Unit)

208/230-1-60

3 1

1 1

2 2

3 3

4 4

5 5

6 6

7 7

8 8

9 9

1010

1111

1

2

3

4

5

6

7

8

9

10

11

(WHI)CN10

(YEL)CN21W

irelessUnitAssembly

MCC-5044

WHI

BLU

BLU

BLU

BLU

BLU

BLU

BLU

BLU

1 1

2 2

1 1

2 2

(BLU)CN62

(WHI)CN61Thermo Sensor

(TA)

Heat Exchanger Sensor(TC)

1 12 2

3 3

4 4

5 5

1 12 2

3 3

4 4

5 5

1 1

2 2

3 3

1 1

2 2

3 3

4 4

5 5

6 6

5 5

4 4

3 3

2 2

1 1

(WHI)CN32

(WHI)CN33

(WHI)CN31

WHI

YEL

YEL

YEL

YEL

1

2

3

4

(WHI)CN22

Color indication

BRW:BROWNYEL:YELLOWBLK:BLACKRED:REDBLU:BLUEWHI:WHITEGRN & YEL:GREEN & YELLOW

Fan Motor

AC Motor

PowerSupplyCircuit

Main PC BoardWP-020

DC5V

DC12V

T3.15A

FuseF01

CN01 CN51

Varistor LineFilter

+

Louver Motor

~

1 1

2 2

3 3

3 3

2 2

1 1

3 3

2 2

1 1

3 3

2

1 1

2 2

1 1

6 6

5 5

4 4

3 3

2

1 1

2 2

1

2

1

L1

1

~ ~

L2 S1 3

1

1

2

1

2

3

L1 L2

COMPRESSORREDWHI

BLK

YEL

YEL

BRW

YEL

ORN

REACTOR

P06

P25

P24

R221P.C.BOARD(MCC-5009)

R220

R219

L03

R321

CN300

CN700

L01

CN603

TS(SUCTION PIPETEMP. SENSOR)

TO(OUTDOOR

TEMP. SENSOR)

TD(DISCHARGE PIPETEMP. SENSOR)

TE(CONDENSER PIPE

TEMP. SENSOR)2

1

PRESSURE SW.

CN602VARISTOR

SURGEABSORBER

P02

WHI

POWERSUPPLY208/230-1-60

P01

BLK

P07

BLK

P03

ORN

CN601

CN600

CN500

BLKWHI

RED

FAN MOTOR

PULSE MOTOR VALVE

VARISTOR

R320

R319

C13

C12 C14

Q200~205IGBT

Q300~305MOS-FET

DB01

POWERRELAY

DB02

Q404

PUR

RELAY

CT

F03FUSE

T3.15AAC250V

P22

P20

P23

P21

P35

P34

P19

P33 P31 P30

CN701P32

P18

P11

P08

P05P04

CM FM

PMV

BLK:BLACKBLU:BLUERED:REDGRY:GRAYPNK:PINK

WHI:WHITEBRW:BROWNORN:ORANGEYEL:YELLOWPUR:PURPLE

COLOR IDENTIFICATION

F01FUSE25AAC250V

COILFOR4WAYVALVE

1 2

1 2

REACTOR


19/114

5-2. RAS-12LKV-UL /RAS-12LAV-UL

FILE NO. SVM-10019

1 1

2 2

1 1

2 2

1 1

2 2

3 3

4 4

5 5

1 1

2 2

3 3

4 4

5 5

6 6

7 7

8 8

9 9

1010

1111

1212

1313

1414

1515

1 1

2 2

3 3

4 4

5 5

6 6

7 7

8 8

9 9

1010

11 11

1212

1313

1414

1515

1 1

2 2

3 3

4

1

2

3

4

4

5 5

1 1

3 3

4 4

5 5

6 6

Outdoor Terminal Block

POWER SUPPLY

Indoor Terminal Block

L1 L2 S

L1 L2 S

3 1

HeatExchanger

GRN&YELBLK

BLK

(BLU)

WHI

RED

(From Outdoor Unit)

208/230-1-60

SHEET METAL

CN02

CN01 CN51

CN62

(WHI)CN61

(WHI)CN32

(WHI)

WHI

YEL

YEL

YEL

YEL

CN31

(WHI)CN22

(WHI)CN10

(WHI)CN21

T3

.15A250VAC

Fuse

F01

Thermo Sensor(TA)

Heat Exchanger Sensor(TC)

Wire

less

Un

itAssem

bly

MCC-5

044

BLU

BLU

BLU

BLU

BLU

BLU

BLUBLU

WHI

Varistor

LineFilter

DC5V

DC12V

Power

Supp

lyCircu

it

Main PC BoardMCC-5045

Louver Motor

Fan Motor

DC Motor

Color indication

BRW:BROWNYEL:YELLOWBLK:BLACKRED:REDBLU:BLUEWHI:WHITEGRN & YEL:GREEN & YELLOW

1 1

2 2

3 3

3 3

2 2

1 1

3 3

2 2

1 1

3 3

2

1 1

2 2

1 1

6 6

5 54 4

3 3

2

1 1

2 2

1

2

1

L1

1

~ ~

L2 S1 3

1

1

2

1

2

3

L1 L2

COMPRESSORREDWHI

BLK

YEL

YEL

BRW

YEL

ORN

REACTOR

P06

P25

P24

R221P.C.BOARD(MCC-5009)

R220

R219

L03

R321

CN300

CN700

L01

CN603

TS(SUCTION PIPETEMP. SENSOR)

TO(OUTDOOR

TEMP. SENSOR)

TD(DISCHARGE PIPETEMP. SENSOR)

TE(CONDENSER PIPE

TEMP. SENSOR)2

1

PRESSURE SW.

CN602VARISTOR

SURGEABSORBER

P02

WHI

POWERSUPPLY208/230-1-60

P01

BLK

P07

BLK

P03

ORN

CN601

CN600

CN500

BLK

WHI

RED

FAN MOTOR

PULSE MOTOR VALVE

VARISTOR

R320

R319

C13

C12 C14

Q200~205IGBT

Q300~305MOS-FET

DB01

POWERRELAY

DB02

Q404

PUR

RELAY

CT

F03FUSE

T3.15AAC250V

P22

P20

P23

P21

P35

P34

P19

P33 P31 P30

CN701P32

P18

P11

P08

P05P04

CM FM

PMV

BLK:BLACKBLU:BLUERED:REDGRY:GRAYPNK:PINK

WHI:WHITEBRW:BROWNORN:ORANGEYEL:YELLOWPUR:PURPLE

COLOR IDENTIFICATION

F01FUSE25AAC250V

COILFOR4WAYVALVE

1 2

1 2

REACTOR

~


20/114

6. SPECIFICATIONS OF ELECTRICAL PARTS

6-1. Indoor Unit

L = 10mH, 16A

2 Outdoor fan motor

3 Suction temp. sensor (TS sensor) 10k(25C)

4 Discharge temp. sensor (TD sensor) 62k(20C)

5 Outside air temp. sensor (TO sensor) 10k(25C)

6 Heat exchanger temp. sensor (TE sensor) 10k(25C)

7 Terminal block (5P) 30A, AC600V

RAS-09LAV-UL

RAS-12LAV-UL

9 COIL FOR P.M.V. DC12V

10 Coil for 4-way valve

CAM-MD 12TCTH-4

STF

Compressor

(Inverter attached)

(Inverter attached)

(Inverter attached)

8

(Inverter attached)

DA89X1C-23FZ2

DA111A1F-20F2

CH-57

ICF-340UA40-2 DC340V, 40W

11 Pressure SW.

ACB-4UB82W 4.7 MPa

RAS-09LKV-UL

(for indoor)RAS-12LKV-UL

2 Room temp. sensor (TA-sensor) 10k at 25C

3 Heat exchanger temp. sensor (TC-sensor) 10k at 25C

4 Louver motor Output (Rated) 1W, 16 poles, DC12V

( )

( )

MP24Z3T

AFS-220-20-4D AC240V, 20W1

ICF-340U30-2 AC220V, 20W

No.

Fan motor

Parts name SpecificationsType

No. Parts name Model name Rating

Reactor1

3-phases 4-poles 750W

3-phases 4-poles 680W

FILE NO. SVM-10019

6-2. Outdoor Unit


21/114

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

RAS-09LKV-UL / RAS-09LAV-UL

NOTE :

The maximum pipe length of this air conditioner is 66ft (20 m). When the pipe length exceeds 50ft (15m), the additional

Deoxidized copper pipe Outer dia. : 3/8 in (9.52mm) Thickness : 1/32 in (0.8mm)

NOTE : Gas leak check position

Refrigerant flow (Cooling)

Refrigerant flow (Heating)

INDOOR UNITT1

TO

Temp. measurement

TC

TA

Indoor heatexchanger

Cross flow fan

Deoxidized copper pipe Outer dia. : 1/4 in (6.35mm) Thickness : 1/32 (0.8mm)

Sectional shapeof heat insulator

Allowableheight

difference:33ft(10mm)

Allowablepipelength

P Pressure measurement

Gauge attaching portVacuum pump connecting port

Strainer

Pulse Modulatingvalve at liquid side

TD

4-way valve

CompressorDA89X1C-23FZ2

TS

T2

Outdoor heatexchanger

Temp. measurement

Propeller fan Refrigerant amount : 1.77lbs (0.80kg)

OUTDOOR UNIT

Muffler

Muffler

TE

Min. : 6.6ft (2m)Chargeless : 50ft (15m

Strainer

Max. : 66ft (20m)

Charge : 0.22oz/ft(51 to 66ft)

charging of refrigerant, 0.22 oz/ft (20g/m) for the part of pipe exceeded 50ft (15m) is required. [(Max. 0.22 lbs (100g)]

[20g/m (16 to 20m)]

FILE NO. SVM-10019

High Pressure switch

Fusible plug


22/114

RAS-12LKV-UL / RAS-12LAV-UL

NOTE :

The maximum pipe length of this air conditioner is 66ft (15 m). When the pipe length exceeds 50ft (15m), the additional

Max. : 66ft (20m)

Deoxidized copper pipe Outer dia. : 3/8 in. (9.52mm)Thickness : 1/32 in. (0.8mm)

NOTE : Gas leak check position

Refrigerant flow (Cooling)

Refrigerant flow (Heating)

INDOOR UNITT1

TO

Temp. measurement

Indoor heatexchanger

Cross flow fan

Deoxidized copper pipe Outer dia. : 1/4 in. (6.35mm) Thickness : 1/32 in. (0.8mm)

Sectional shapeof heat insulator

Allowableheight

difference:33ft(10m)

Allowablepipelength

P Pressure measurement

Gauge attaching portVacuum pump connecting port

Strainer

Pulse Modulatingvalve at liquid side

1.2 x 80

1.2 x 80

TD

4-way valve

CompressorDA111A1F-20F1

TS

T2

Outdoor heatexchanger Split capillary

Temp. measurement

Propeller fan Refrigerant amount : 2.43 lbs (1.10kg)

OUTDOOR UNIT

Muffler

Muffler

TE

TC

TA

charging of refrigerant, 0.22 oz/ft (20g/m) for the part of pipe exceeded 15m is required. [Max. 0.22 lbs (100g)]

Min. : 6.6ft (2m)Chargeless : 50 ft (15m)

Charge : 0.22oz/ft(51 to 66 ft)[20g/m (16 to 20m)]

FILE NO. SVM-10019


23/114

7-2. O eration Data

Tempeature Model name Standard Heat exchanger Indoor Outdoor Compressor

condition(C) RAS- pressure pipe temp. fan mode fan mode revolution

Indoor Outdoor P Psia (MPa) T1 F (C) T2 F (C) (rps)

80/67 98/75 137 to 160 54 to 57 99 to 102

(26.7/19.4) (35/23.9) (0.9 to 1.1) (12 to 14) (37 to 39)

116 to 145 52 to 55 104 to 107

(0.8 to 1.0) (11 to 13) (42 to 44)

Tempeature Model name Standard Heat exchanger Indoor Outdoor Compressor

condition(C) RAS- pressure pipe temp. fan mode fan mode revolutionIndoor Outdoor P Psia (MPa) T1 F (C) T2 F (C) (rps)

70/60 47/43 363 to 392 102 to 105 32 to 37

(21.1/15.6) (8.3/6.1) (2.5 to 2.7) (39 to 41) (0 to 3)

377 to 406 106 to 106 32 to 36

(2.6 to 2.8) (41 to 43) (0 to 2)

NOTES :

1. Measure surface temperature of heat exchanger pipe around center of heat exchaner path U bent.

(Thermistor themometer)

2. Connecting piping condition : 16 ft (5m)

62

High High 64

09LKV-UL

12LKV-UL

High High

12LKV-UL High High 77

High High 6009LKV-UL

FILE NO. SVM-10019


24/114

8. CONTROL BLOCK DIAGRAM

8-1. Indoor Unit

M.C.U. Indoor Unit Control Unit

From Outdoor Unit208/230-1-60 Serial Signal Communication

(Operation Command and Information)

Serial Signal Transmitter/Receiver

Converter(D.C circuit)

Noise Filter

IndoorFan Motor

LouverMotor

Louver MotorDrive Control

Indoor FanMotor Control

Initializing Circuit

Clock FrequencyOscillator Circuit

Power SupplyCircuit

Infrared Rays, 36.7kHzRemote Controller

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

Operation Mode SelectionAUTO, COOL, DRY, HEAT, FAN

REMOTE CONTROLLER

ECO

Hi-POWER

Heat Exchanger Sensor (Tc)

Room Temperature Sensor (Ta)

Infrared Rays Signal Receiverand Indication

Functions

Cold draft preventing Function

3-minute Delay at Restart for Compressor

Fan Motor Starting Control

Processing(Temperature Processing)

Timer

Serial Signal Communication

Clean Function

Operation (START/STOP)

COMFORT SLEEP

QUIET

SLEEP (1,3,5,9 OFF TIMER)

FILE NO. SVM-10019


25/114

8-2. Outdoor Unit (Inverter Assembly)

208/230-1-60

MICRO-COMPUTER

BLOCK

DIAGRAM

Drivercircuit

ofP.M.V.

Heatexc

hanger

temp.sensor

Suction

temp.

sensor

Outdoorair

temp.s

ensor

Discharge

temp.s

ensor

Indoorunit

send/receive

circuit

Relay

circuit

Noise

Filter

Converter

(ACDC)

Clock

frequency

4MHz

HighPower

factorCorrection

circuit

Inputcurrent

sensor

PWMsynthesisfunction

Inputcurrentreleasecontrol

IGBTover-currentdetectcontrol

Outdoorfancontrol

Highpowerfactorcorrectioncontrol

Inverteroutputfrequencycontrol

A/Dconverterfunction

P.M.V.control

Dischargetemp.control

4-wayvalvecontrol

Signalcommunicationtoindoorun

it

P.M.V.:PulseMotorValve

M.C.U.:MicroControlUnit

M.C.U

ForINDOORUNIT

4-way

valve

P.M.V.

Inverter

(DCAC)

Gatedrive

circuit

Gatedrive

circuit

Inverter

(DC

AC)

Outdoor

Fanmotor

Compressor

MCC5009(P.C.B)

OUTDOORUNIT

Current

detect

Curre

nt

detect

FILE NO. SVM-10019


26/114

9. OPERATION DESCRIPTION

9-1. Outline of Air Conditioner Control

This air conditioner is a capacity-variable type airconditioner, which uses AC or DC motor for the indoorfor motor and the outdoor fan motor. And the capacity-proportional control compressor which can change the

motor speed in the range from 11 to 96 rps ismounted. The DC motor drive circuit is mounted to theindoor unit. The compressor and the inverter to controlfan motor are mounted to the outdoor unit.

The entire air conditioner is mainly controlled by theindoor unit controller.

The indoor unit controller drives the indoor fan motorbased upon command sent from the remote controller,and transfers the operation command to the outdoorunit controller.

The outdoor unit controller receives operation com-mand from the indoor unit side, and controls theoutdoor fan and the pulse Modulating valve. (P.M.V)

Besides, detecting revolution position of the compres-sor motor, the outdoor unit controller controls speed ofthe compressor motor by controlling output voltage ofthe inverter and switching timing of the supply power(current transfer timing) so that motors drive accordingto the operation command.And then, the outdoor unit controller transfers reverselythe operating status information of the outdoor unit tocontrol the indoor unit controller.

As the compressor adopts four-pole brushlessDC motor, the frequency of the supply powerfrom inverter to compressor is two-times cyclesof the actual number of revolution.

1. Role of indoor unit controller

The indoor unit controller judges the operationcommands from the remote controller and assumesthe following functions.

Judgment of suction air temperature of the indoorheat exchanger by using the indoor temp. sensor.(TA sensor)

Judgment of the indoor heat exchanger tempera-ture by using heat exchanger sensor (TC sensor)(Prevent-freezing control, etc.)

Louver motor control

Indoor fan motor operation control LED (Light Emitting Diode) display control

Transferring of operation command signal (Serialsignal) to the outdoor unit

Reception of information of operation status(Serial signal including outside temp. data) to theoutdoor unit and judgment/display of error

Air purifier operation control

2. Role of outdoor unit controller

Receiving the operation command signal (Serialsignal) from the indoor unit controller, the outdoorunit performs its role.

Compressor operation control

Operation control of outdoor fan motor

P.M.V. controlOperations followed to judgmentof serial signal from indoor side.

Detection of inverter input current and currentrelease operation

Over-current detection and prevention operationto IGBT module (Compressor stop function)

Compressor and outdoor fan stop function when

serial signal is off (when the serial signal does notreach the board assembly of outdoor control bytrouble of the signal system)

Transferring of operation information (Serialsignal) from outdoor unit controller to indoor unitcontroller

Detection of outdoor temperature and operationrevolution control

Defrost control in heating operation (Temp.measurement by outdoor heat exchanger andcontrol for 4-way valve and outdoor fan)

3. Contents of operation command signal

(Serial signal) from indoor unit controller tooutdoor unit controller

The following three types of signals are sent fromthe indoor unit controller.

Operation mode set on the remote controller

Compressor revolution command signal definedby indoor temperature and set temperature(Correction along with variation of room tempera-ture and correction of indoor heat exchangertemperature are added.)

Temperature of indoor heat exchanger

For these signals ([Operation mode] and [Com-pressor revolution] indoor heat exchanger tem-perature), the outdoor unit controller monitors theinput current to the inverter, and performs thefollowed operation within the range that currentdoes not exceed the allowable value.

4. Contents of operation command signal(Serial signal) from outdoor unit controllerto indoor unit controller

The following signals are sent from the outdoor unitcontroller.

The current operation mode

The current compressor revolution

Outdoor temperature Existence of protective circuit operation

For transferring of these signals, the indoor unitcontroller monitors the contents of signals, andjudges existence of trouble occurrence.

Contents of judgment are described below.

Whether distinction of the current operationstatus meets to the operation command signal

Whether protective circuit operates

When no signal is received from the outdoorunit controller, it is assumed as a trouble.

FILE NO. SVM-10019


27/114

9-2. Operation Description

1. Basic operation ........................................................................................................... 28

1. Operation control ................................................................................................... 28

2. Cooling/Heating operation ..................................................................................... 29

3. AUTO operation ..................................................................................................... 29

4. DRY operation ........................................................................................................ 29

2. Indoor fan motor control ............................................................................................. 30

3. Outdoor fan motor control ........................................................................................... 32

4. Capacity control .......................................................................................................... 33

5. Current release control ............................................................................................... 33

6. Release protective control by temperature of indoor heat exchanger........................ 34

7. Defrost control (Only in heating operation) ................................................................ 35

8. Louver control ............................................................................................................. 36

1) Louver position ....................................................................................................... 36

2) Air direction adjustment ......................................................................................... 36

3) Swing ..................................................................................................................... 36

9. ECO operation ............................................................................................................ 37

10. Temporary operation ................................................................................................... 38

11. Discharge temperature control ................................................................................... 38

12. Pulse Modulating valve (P.M.V.) control ..................................................................... 39

13. Self-Cleaning function................................................................................................ 40

14. Remote-A or B selection ......................................................................................... ... 42

9-3. Auto Restart Function..

9-3-1. How to Cancel the A uto Restart Function ................................................................. 45

9-3-2. How to set the Auto Restart Function ....................................................................... 46

9-3-3. Power Failure During Timer Operation ......................................................... .......... 469-4. Remote Controller and Its Fuctions

9-4-1. Parts Name of Remote Controller ............................................................................. 47

9-4-2. Operation of remote control ................................................. ..................................... 47

15. QUIET mode ............................................................................................................. 4316. COMFORT SLEEP mode ............ ............................................................................. 43

17. One-Touch Comfort ........................ .......................................................................... 43

18. Hi-POWER Mode .................................................... .................................................. 44

9-4-3. Name and Functions of Indications on Remote Controller ....................................... 50

FILE NO. SVM-10019

19. FILTER Indicator ........................................................................................................ 44


28/114

Item

1. Basicoperation

Operation flow and applicable data, etc.

1. Operation control

Description

Receiving the users operation condition setup, the operation statuses of indoor/outdoor units arecontrolled.

1) The operation conditions are selected by the remote controller as shown in the below.

2) A signal is sent by ON button of the remote controller.

3) The signal is received by a sensor of the indoor unit and processed by the indoor controllers asshown in the below.

4) The indoor controller controls the indoor fan motor and louver motor.

5) The indoor controller sends the operation command to the outdoor controller, and sends/receivesthe control status with a serial signal.

6) The outdoor controller controls the operation as shown in the left, and also controls the compres-sor, outdoor fan motor, 4-way valve and pulse Modulating valve.

Remote controller

Indoor unit

Control contents of remote controller ON/OFF (Air conditioner/Air purifier) Operation select (COOL/HEAT/AUTO/DRY) Temperature setup Air direction Swing Air volume select (AUTO/LOW/LOW+/MED/MED+/HIGH) ECO ON timer setup OFF timer setup Hi-POWER

Indoor unit control Command signal generating function of

indoor unit operation Calculation function (temperature calculation) Activation compensation function of indoor fan Cold draft preventive function Timer function Indoor heat exchanger release control

Indoor fan motor Louver motor

Outdoor unit

Outdoor unit control Frequency control of inverter output Waveform composite function Calculation function

(Temperature calculation) AD conversion function Quick heating function Delay function of compressor reactivation Current release function GTr over-current preventive function Defrost operation function

Compressor Outdoor fan motor 4-way valve Pulse Modulating valve

(P.M.V.)

Signal receiving

Indoor unit control

Operation command

Serial signal send/receive

Selection ofoperation conditions

ON/OFF

Serial signal send/receive

Outdoor unit control

Inverter

~

COMFORT SLEEPQUIETPRESETONE-TOUCH

FILE NO. SVM-10019


29/114

Operation ON Setup of remote controller

Indoorfan motor control / Louver control / Operation Hz

Control (Requierment)Indoor unit control

Sending of operation command signal

Outdoor unit control [ ]

Compressor revolution control / Outdoor fan motor control /

4-way valve control In cooling operation: ON In heating operation: OFFPulse Modulating valve control

Item

1. Basicoperation


2. Cooling/Heating operation

Description

The operations are performed in the following parts by controls according to cooling/heating conditions.

1) Receiving the operation ON signal of the remote controller, the cooling or heating operation signalstarts being transferred form the indoor controller to the outdoor unit.

2) At the indoor unit side, the indoor fan is operated according to the contents of 2. Indoor fan

motor control and the louver according to the contents of 9. Louver control, respectively.

3) The outdoor unit controls the outdoor fan motor, compressor, pulse Modulating valve and4-way valve according to the operation signal sent from the indoor unit.

3. AUTO operation

Selection of operation modeAs shown in the following figure, the operation starts byselecting automatically the status of room temperature(Ta) when starting AUTO operation.

*1. When reselecting the operation mode, the fanspeed is controlled by the previous operation mode.

4. DRY operation

DRY operation is performed according to the differencebetween room temperature and the setup temperature asshown below.

In DRY operation, fan speed is controlled in order toprevent lowering of the room temperature and to avoid airflow from blowing directly to persons.

1) Detects the room temperature (Ta) whenthe DRY operation started.

2) Starts operation under conditions in theleft figure according to the temperaturedifference between the room tempera-ture and the setup temperature (Tsc).Setup temperature (Tsc)= Set temperature on remote controller (Ts) + 0~1.0C (0 to 2F)

3) When the room temperature is lower2F (1C) or less than the setuptemperature, turn off the compressor.

1) Detects the room temperature (Ta) whenthe operation started.

2) Selects an operation mode from Ta inthe left figure.

3) Fan operation continues until anoperation mode is selected.

4) When AUTO operation has started

within 2 hours after heating operationstopped and if the room temperature is68F (20C) or more, the fan operation isperformed with Super Ultra LOW modefor 3 minutes.Then, select an operation mode.

5) In AUTO mode, either cooling or heatingoperation will be selected. When roomtemperature reach set temperaturecommpressor will stop. In case that thecompressor stops for 15 minutes, the

Ts + 1

Ts 1

Ta

Cooling operation

Monitoring (Fan)

Heating operation

Tsc

+1.0 (0.5)

+2.0 (1.0)

F [C]

Ta

Fan speed

L (W5)

(W5+W3) / 2

SUL (W3)

Operation Hz control (Include limit control)

FILE NO. SVM-10019

C

AUTO mode will reselect cooling orheating operation.


30/114

Item

2. Indoor fanmotor control


(This operation controls the fan speed at indoor unit side.)

The indoor fan (cross flow fan) is operated by the phase-control induction motor. The fan rotates in 5 stages inMANUAL mode, and in 5 stages in AUTO mode, respec-

tively. (Table 1)

Description

* Symbols

UH : Ultra HighH : HighM+ : Medium+

M : MediumL+ : Low+L : LowL- : LowUL : Ultra LowSUL : Super Ultra Low

* The values of fan speed and air flowvolume indicate on the table are measuredwhen the louver is inclined downward.Fan speed and air flow volume broadlyvary with position of louver.

1) When setting the fan speed to L,L+, M, M+ or H on the remote

controller, the operation isperformed with the constantspeed shown in Fig. 1.

2) When setting the fan speed toAUTO on the remote controller,revolution of the fan motor iscontrolled to the fan speed levelshown in Fig. 2 and Table 1according to the setup tempera-ture and room temperature.

(Fig. 1)

(Fig. 2)

(Table 1) Indoor fan air flow rate

+4.5 (+2.5)

TaF [C]

+3.5 (+2.0)

+2.7 (+1.5)

+2.0 (+1.0)

+1.0 (+0.5)

Tsc

a

b

c

d

e

M+(WB)

*3

*4

*5

L(W6)

Air volume AUTO

L

L+

M

M+

H

W6

(L + M) / 2

W9

(M + H) / 2

WC

Indication Fan speed

Fan speed setup

COOL ON

AUTO

MANUAL

*3 : Fan speed = [(M+)L]x 3/4 + L

*4 : Fan speed = [(M+)L]x 2/4 + L

*5 : Fan speed = [(M+)L]x 1/4 + L

(Linear approximationfrom M+ and L)

FILE NO. SVM-10019

Fanspeed Airflowrate Fanspeed Airflowrate(rpm) cfm(m3/h) (rpm) cfm(m3/h)

WF UH 1210 336(571) 1510 433(735)

WE H 1210 336(571) 1510 433(735)

WD UH M+ UH 1170 321(546) 1480 422(717)

WC H H 1120 303(515) 1430 404(686)

WB M+ M+ 1040 274(465) 1280 350(594)

WA M 1000 248(421) 1220 328(557)

W9 M L+ 960 235(400) 1150 302(514)

W8 L 870 200(340) 1000 248(421)

W7 L+ L- L+ 850 194(330) 980 241(409)

W6 L L 760 159(270) 920 219(372)

W5 L- UL L- 760 159(270) 900 212(360)

W4 UL UL 700 141(240) 840 190(323)

W3 SUL SUL 650 118(200) 770 165(280)

W2 SUL 500 65(110) 620 110(187)

W1 500 65(110) 520 74(126)

RAS 12LKV ULFan speedlevel DRYEATOOL

RAS 09LKV UL


31/114

Item

2. Indoor fanmotor control


Description

1) When setting the fan speed to L,L+, M, M+ or H on the remotecontroller, the operation is per-formed with the constant speedshown in Fig. 3 and Table 1.

2) When setting the fan speed toAUTO on the remote controller,revolution of the fan motor iscontrolled to the fan speed levelshown in Fig. 5 according to the settemperature and room temperature.

3) Min air flow rate is controlled bytemperature of the indoor heatexchanger (Tc) as shown in Fig. 4

for prevent high temperature of heatexchanger.

4) Cold draft prevention, the fan speedis controlled by temperature of the

[In starting and in stability]

(Fig. 3)

(Fig. 4)

(Fig. 5)

Cold draft preventive control

(Fig. 6)

L

L+

M

M+

H

W8

(L + M) / 2

WA

(M + H) / 2

WE

Indication Fan speed

Fan speed setup

HEAT ON

AUTO

YES

NO

MANUAL

TC 107.6F (42 C) Min air flow rate control

Tc F (C) Limited to Min WD tap

* Fan speed =(TC W8) + W8

No limit

*

Fan speedAUTO

Basicfancontrol

* No limitation while fan speed MANUAL mode is in stability.* A: When Tsc 75F (24C), A is 75F (24C), and

Tsc: Set value

b

d

e

f

g

L+ (W9)

M+ (WD)

*1

*2

*3

H (WE)

H (WE)

Linear-approximateH and SUL with Tc.

SUL (W2)

Stop

115(46) 115(46)

Tc

93 (34)

*A+4 *A+4 *A+4

*A-4 *A-4 *A-4

Fan speed MANUAL in starting

Fan speed AUTO in stabilityFan speed AUTO in starting

*1: Fan speed = [(M+) (L+)]x 1 4 + L+*2: Fan speed = [(M+) (L+)]x 2 4 + L+*3: Fan speed = [(M+) (L+)]x 3 4 + L+(Calculated with linear approximation from M+ and L+)

TaF[C]

TSC

-1.0(-0.5)

-2.0(-1.0)

-2.7(-1.5)

-3.5(-2.0)

-4.5(-2.5)

-9.0(-5.0)

-10.0(-5.5)

F(C)

113 (45) 113 (45) 91 (33)

91 (33) 91 (33) 70(21)

90(32) 90(32) 68 (20)

when Tsc < 75F (24C), A is Tsc

FAN AUTO

FAN Manual

In starting

Until 12 minutes passed after operation start

When 12 to 25 minutes passed after operationstart and room temp. is 5.4F (3C) or lower than set temp.

Room temp. < Set temp. -7F ( 4C)

In stability

When 12 to 25 minutes passed after operation startand room temp. is higher than [set temp. -5.4F (3C)]

When 25 minutes or more passed after operation start

Room temp. Set temp. -6.3F (3.5C)

5) In order to prevent Cold draft when

compressor stop during heatingoperation. Then louver will move to

upper position and fan speed will

reduce or off.

FILE NO. SVM-10019

126 (52)124 (51)

108 (42)106 (41)

indoor heat exchanger (Tc) as shown

in Fig. 6 for keep warm temperatureof air flow.


32/114

Item

3. Outdoor fanmotor control


The blowing air volume at the outdoor unit side is controlled.

Receiving the operation command from the controller ofindoor unit, the controller of outdoor unit controls fan speed.

* For the fan motor, a DC motor with non-stage variablespeed system is used. However, it is limited to 8 stages forreasons of controlling.

Description

1) The operation command sentfrom the remote controller isprocessed by the indoor unitcontroller and transferred to thecontroller of the outdoor unit.

2) When strong wind blows atoutdoor side, the operation of airconditioner continues with thefan motor stopped.

3) Whether the fan is locked or notis detected, and the operation ofair conditioner stops and analarm is displayed if the fan islocked.

4) According to each operationmode, by the conditions ofoutdoor temperature (To) andcompressor revolution, the speedof the outdoor fan shown in the

table is selected.

Air conditioner ON(Remote controller)

YES

YES

NO

NO

Indoor unit controller

Fan motor ON

3) Fan lock

4) Motor operates as shown in the table below.

1) Outdoor unitoperation command(Outdoor fan control)

Air conditionerOFF

Alarmdisplay

2) Fan speed 400.

(by strong wind)when the motor OFF.

Fan motor OFF continues(Use wind for heat

exchanging)

Outdoor fan speed (rpm)

Tap

f 1

f 2

f 3

f 4

f 5

f 6

f 7

f 8

200 200

300 300

370 370

440 440

440 440

500 500

550 550

600 600

Tap

f 9

f A

f B

f C

f D

f E

f F

600 650

600 700

650 700

700 800

700 800

700 800

700 900

Compressor speed (rps)

To

DuringECO mode

When To is abnormal

~ 13.8 ~ 31.7 32.3 ~ MAX

MIN MAX MIN MAX MIN MAX

f 2 f 3 f A f C f D f F

f 2 f 3 f 7 f A f 9 f C

f 1 f 3 f 2 f 5 f 4 f 7

f 1 f 1 f 1 f 2 f 2 f 4

f 2 f 3 f B f C f C f D

In cooling operation

Compressor speed (rps)

To

During

ECO mode

When To is abnormal

~16.8 ~47.9 48.5 ~ MAX

f 3 f 8 f 9

f 3 f 9 f A

f 8 f A f D

f B f C f D

f 3 f 3 f 6

f 3 f 3 f 8

f 5 f 9 f 9

f 7 f A f B

f A f B f D

In Heating operation

f 2 f 3 f C f D f E f F

f 0 f 0 f 0 f 1 f 1 f 2

f D f F f D f F f F

f 2 f 3 f 2 f 3 f B f C

f D

RAS-09LAV-UL RAS-12LAV-UL

f 0 0 0

RAS-09LAV-UL RAS-12LAV-UL

To 100F (38C)

To 82F (28C)

To 59F (15C)

To 42F (5.5C)

To 32F (0C)

To < 32F (0C)

To 100F (38C)

To 100F (38C)

To 50F (10C)

To 42F (15C)

To 22F (-5C)

To < 22F (-5C)

To 50F (10C)

To 42F (15C)

To 22F (-5C)

To < 22F (-5C)

FILE NO. SVM-10019


33/114

Item

4. Capacitycontrol


The cooling or heating capacity depending on the load isadjusted.

According to difference between the setup value of tempera-ture and the room temperature, the capacity is adjusted bythe compressor revolution.

Description

1) The difference between settemperature on remote controller(Ts) and room temperature (Ta)is calculated.

2) According to the temperaturedifference, the correction value ofHz signal which determines thecompressor speed is set up.

3) The rotating position and speedof the motor are detected by theelectromotive force occurred onthe motor winding with operationof the compressor.

4) According to the differenceresulted from comparison of thecorrection value of Hz signal withthe present operation Hz, theinverter output and the commuta-tion timing are varied.

5) Change the compressor motorspeed by outputting power to thecompressor.

* The contents of controloperation are same in coolingoperation and heatingoperation

This function prevents troubles on the electronic parts of thecompressor driving inverter.

This function also controls drive circuit of the compressorspeed so that electric power of the compressor drive circuitdoes not exceed the specified value.

5. Current releasecontrol

Outdoor temp. To

Setup of current release point

Outdoor unit inverter maincircuit control current

High

Low

Reduce compressor speedOperating current

Setup value

1) The input current of the outdoorunit is detected in the invertersection of the outdoor unit.

2) According to the detectedoutdoor temperature, thespecified value of the current isselected.

3) Whether the current valueexceeds the specified value ornot is judged.

4) If the current value exceeds thespecified value, this functionreduces the compressor speedand controls speed up to the

closest one commanded from theindoor unit within the rangewhich does not exceed thespecified value.

Outdoor temp.Cooling current release value Heating current release value

RAS-09LAV-UL RAS-12LAV-UL RAS-09LAV-UL RAS-12LAV-UL

113F (45C)

104F (40C)

61F (16C)

52F (11C)

111F (44C)

102F (39C)

60F (15.5C)

51F (10.5C)

3.97A

4.35A

6.30A

4.27A

4.88A

8.47A

6.30A 7.72A

6.30A 8.10A

6.30A 8.47A

FILE NO. SVM-10019

Set temp. (Ts) Room temp. (Ta)

Correction value of Hz signal

Detection of electromotive forceof compressor motor winding

Inverter output changeCommutation timing change

Change of compressor speed

Remote contr oller Indoor unit

Ts Ta

Correction value of Hz signal-Operating Hz

Detection of motor speed (Operation Hz)and rotor position

Capacity control continues

Current decrease


34/114

Item

6. Release protectivecontrol by tempera-ture of indoor heatexchanger


(Prevent-freezing control for indoor heat exchanger)

In cooling/dry operation, the sensor of indoor heatexchanger detects evaporation temperature andcontrols the compressor speed so that temperature of

the heat exchanger does not exceed the specifiedvalue.

Description

1) When temperature of the indoorheat exchanger drops below 41F(5C), the compressor speed isreduced. (P zone)

2) When temperature of the indoorheat exchanger rises in therange from 43F (6C) to under45F (7C), the compressorspeed is kept. (Q zone)

3) When temperature of the indoorheat exchanger rises to 45F (7C)or higher, the capacity controloperation returns to the usualcontrol in cooling operation.(R zone)

1) When temperature of the indoorheat exchanger rises in therange from 126F (52C) to 131F(55C), compressor speed is kept.(Q zone)

When temperature of the indoorheat exchanger drops in therange from 118F (48C) to under131F (55C) the compressorspeed is kept. (Q zone)

2) When temperature of the indoorheat exchanger rises to 131F(55C) or higher, the compressorspeed is reduced. (P zone)

3) When temperature of the indoorheat exchanger does not rise to126F (52C), or when it dropsbelow to 118F (48C), the capacitycontrol operation returns to theusual control in heating operation.(R zone)

(Prevent-overpressure control for refrigerating cycle)

In heating operation, the sensor of indoor heat ex-changer detects condensation temperature and controlsthe compressor speed so that temperature of the heatexchanger does not exceed the specified value.

(7 C)

(6 C)

(5 C)

R

Q

P

(55 C)

(52 C)

(48 C)

P

Q

R

Usual cooling capacity control

Reduction of compressor speedIndoorheatexchangertemperature

When the value isin Q zone, thecompressor speedis kept.

Reduction of compressor speed

Usual heating capacity controlIndoorheatexchangertemperature

When the value isin Q zone, thecompressor speedis kept.

45 F

43 F

41 F

131 F

126 F

118 F

FILE NO. SVM-10019


35/114

Item Operation flow and applicable data, etc. Description

7. Defrost control(Only in heatingoperation)

(This function removes frost adhered to the outdoorheat exchanger.)

The temperature sensor of the outdoor heat ex-changer (Te sensor) judges the frosting status of theoutdoor heat exchanger and the defrost operation isperformed with 4-way valve reverse defrost system.

The necessity of defrost operation isdetected by the outdoor heat exchangertemperature. The conditions to detect thenecessity of defrost operation differ in A,B, or C zone each. (Table 1)

Defrost operation in A to C zones

1) Stop operation of the compressor for20 seconds.

2) Invert (ON) 4-way valve 10 secondsafter stop of the compressor.

3) The outdoor fan stops at the same timewhen the compressor stops.

4) When temperature of the indoor heatexchanger becomes 100F (38C) orlower, stop the indoor fan.

Returning conditions from defrostoperation to heating operation

1) Temperature of outdoor heat exchangerrises to 46F (8C) or higher.

2) Temperature of outdoor heat exchanger iskept at 41F (5C) or higher for 80 seconds.

3) Defrost operation continues for15 minutes.

1) Stop operation of the compressor forapprox. 50 seconds.

2) Invert (OFF) 4-way valve approx. 40seconds after stop of the compressor.

3) The outdoor fan starts rotating at thesame time when the compressor starts.

Table 1

* The minimum value of Te sensor 10 to 15 minutesafter start of operation is stored in memory as Te0.

(5 C)

0 10 15 2740 34

(7 C)

(20 C)

Operation time(Minute)

Start of heating operation

*Outdoorh

eatexchangertemperature

C zone

A zone

B zone

A zone

B zone

C zone

When Te0 - TE 4.5F (2.5C) continued for 2 minutes inA zone, defrost operation starts.

When the operation continued for 2 minutes in B zone,defrost operation starts.

When Te0 - TE 5.4F (3C) continued for 2 minutes inC zone, defrost operation starts.

23 F

19 F

4 F

FILE NO. SVM-10019


36/114

Horizontalblowing

Inclinedblowing

Blowingdownward

Air direction

Inclinedblowing

Horizontalblowing

Initial setting of "Cooling storage position"Louver : Directs downward (35.3)

Heating operation/AUTO (HEAT)

Initial setting of Heating storage positionLouver : Directs downward (80.5 )

Item

8. Louver control

1) Louverposition


This function controls the air direction of the indoor unit.

Description

Swing operation is perforin range 35 with the Fixed position asthe center.

If the swing rangeexceeded either upper or lower limit position,swing operation is perfomed in range 35 from the limit.

3) Swing

2) Louver position in heating operation

2) Air direction adjustment

The position is automatically controlled according to the operation

The set louver position is stored in memory by the microcomputer,

The angle of the louver is indicated as the louver closes fully is 0.

1) Louver position in cooling operation

mode (COOL/HEAT).

and the louver returns to the stored position when the next operation

is performed. (Cooling/Heating memory position)

Swing

When pressing[SWING] button during

operation, the louverstarts swinging.

The louver position canbe arbitrarily set up by

pressing [FIX] button.

FILE

ac carrier.pdf

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