TOSHIBA RAS-B18G3KVSG-E Air Conditioner Split Type Installation Guide

: June 12, 2024
: Toshiba

Table of Contents

TOSHIBA RAS-B18G3KVSG-E Air Conditioner Split Type
Product Information

TOSHIBA RAS-B18G3KVSG-E Air Conditioner Split Type

TOSHIBA-RAS-B18G3KVSG-E-Air-Conditioner-Split-Type

Product Information

Product Name: Air Conditioner (Split Type)

Model Numbers:

Indoor unit: RAS-B18, 22, 24G3KVSG-E RAS-B18, 22, 24G3KVSGB-E
Outdoor unit: RAS-18J2AVSG-E1 RAS-22J2AVSG-E1 RAS-24J2AVSG-E1

Manual Version: 1144350101

Product Usage Instructions

Precautions for Safety
Please read the following precautions carefully before operating the unit:

This appliance is filled with R32.
Open the service valves before the operation to avoid burst hazards.
Before installation, read and follow the provided safety precautions to avoid risks.
The symbols used in this manual have the following meanings:
- WARNING: Incorrect use of this unit may cause severe injury or death.
- CAUTION: Incorrect use of this unit may cause personal injury or property damage.
- 1: Personal injury means a slight accident, burn, or electrical shock which does not require admission or repeated hospital treatment.
- 2: Property damage means greater damage which affects assets or resources.

Installation

Follow these steps for installation:

Ensure that the power supply cord and connecting cable of the appliance use at least polychloroprene sheathed flexible cord (design H07RN-F) or cord designation 60245 IEC66.
Install the appliance according to national wiring regulations.
Before doing any electrical work, attach an approved plug to the power supply cord and ensure proper grounding of the equipment.
If any damage is detected, do not install the unit and contact your dealer immediately.

Important: The air conditioner must be installed by qualified persons only. Make sure to turn off the main power supply before attempting any electrical work. Never modify the unit by removing safety guards or bypassing safety interlock switches. Do not install the unit in a place that cannot bear its weight to avoid personal injury and property damage.

INSTALLATION MANUAL
AIR CONDITIONER (SPLIT TYPE)

ENGLISH

Indoor unit RAS-B18, 22, 24G3KVSG-E RAS-B18, 22, 24G3KVSGB-E
Outdoor unit RAS-18J2AVSG-E1 RAS-22J2AVSG-E1 RAS-24J2AVSG-E1

PRECAUTIONS FOR SAFETY

Read the precautions in this manual carefully before operating the unit.

This appliance is filled with R32.

QWarning indications on the air conditioner unit

Warning indication

Description

CAUTION
BURST HAZARD
Open the service valves before the operation, otherwise there might be the burst.

CAUTION
BURST HAZARD Open the service valves before the operation, otherwise there might be the burst.

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 : It indicates that incorrect use of this unit may cause personal injury
(1), or property damage (2). 1: Personal injury means a slight accident, burn, or electrical shock
which does not require admission or repeated hospital treatment. 2: Property damage means greater damage which affects assets or
resources.

For general public use
Power supply cord and connecting cable of appliance use shall be at least polychloroprene sheathed flexible cord (design H07RN-F) or cord designation 60245 IEC66. (Shall be installed in accordance with national wiring regulations.)

CAUTION

To disconnect the appliance from the main power supply

This appliance must be connected to the main power supply by means of a circuit breaker or a switch with a contact separation of at least 3 mm in all poles.

1

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 OVERHEATING 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 (R32 OR 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 GAS LEAKS OUT OF THE PIPE DURING THE INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS IS HEATED BY FIRE OR SOMETHING ELSE, IT CAUSES GENERATION OF POISONOUS GAS.
WARNING
Never modify this unit by removing any of the safety guards or bypassing any of the safety interlock switches.
Do not install in a place which cannot bear the weight of the unit. Personal injury and property damage can result if the unit falls.
Before doing the electrical work, attach an approved plug to the power supply cord. Also, make sure the equipment is properly earthed.
Appliance shall be installed in accordance with national wiring regulations. If you detect any damage, do not install the unit. Contact your dealer immediately.
Do not use any refrigerant different from the one specified for complement or replacement. Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a failure or explosion of the product or an injury to your body.
2

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%HDZDUHWKDWUHIULJHUDQWVPDQRWFRQWDLQDQRGRXU ‘RQRWSLHUFHRUEXUQDVWKHDSSOLDQFHLVSUHVVXUL]HG’RQRWH[SRVHWKH
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
WARNING After installation work, make sure below before operation.
Connection pipes are connected properly and no leakage. Packed valves are fully open. 5XQQLQJFRPSUHVVRUZLWKRXWRSHQSDFNHGYDOYHVPDFDXVHDEQRUPDOKLJK SUHVVXUHDQGSDUWVIDLOXUH /HDNDJHDWFRQQHFWLRQSLSLQJPDVXFNDLUDQGPDNHIXUWKHUKLJKSUHVVXUH FDXVHEXUVWDQGLQMXUH During pump down work make sure below process. Don’t mix air into the refrigerant cycle. Stop the compressor before removing piping after packed valves are fully closed. 5HPRYLQJSLSLQJXQGHUWKHFRPSUHVVRUUXQQLQJDQGSDFNHGYDOYHVRSHQDLU PLJKWEHVXFNHGDQGUHIULJHUDWLRQFFOHSUHVVXUHEHFRPHVDEQRUPDOOKLJKDQG LWFDXVHVEXUVWRULQMXURQSHUVRQV
3

CAUTION · 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. · Do not install the unit at place where leakage of Àammable gas may occur. In case gas leaks and accumulates at surrounding of the unit, it may cause of ¿re. · 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. · To avoid personal injury, be careful when handling parts with sharp edges. · Please read this installation manual carefully before installing the unit. It contains further important instructions for proper installation. · The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual.
REQUIREMENT OF REPORT TO THE LOCAL POWER SUPPLIER Please make absolutely sure that the installation of this appliance is reported to the local power supplier before installation. If you experience any problems or if the installation is not accepted by the supplier, the service agency will take adequate countermeasures.
Important information regarding the refrigerant used This product contains Àuorinated greenhouse gases. Do not vent gases into the atmosphere. Refrigerant type: R32 GWP(1) value: 675 (ex. R32 ref. AR4) (1)GWP = global warming potential The refrigerant quantity is indicated on the unit name plate. This value is based on F gas regulation 517/2014
4

ACCESSORY PARTS

Indoor Unit

No.

Part name

No.

Part name

1

2

Installation plate × 1

Wireless remote control × 1

3

4

Battery × 2

Remote control holder × 1

5

6

Toshiba Ultra pure filter × 2

Mounting screw × 6

7

8

Flat head wood screw × 2

Owner’s Manual × 1

9

!

Installation Manual × 1

Screw × 2

” B Label × 1

Outdoor Unit

No.

Part name

No.

Part name

$

Drain nipple × 1

Cap water proof × 2

Air filters Clean every 2 weeks.
1. Open the air inlet grille. 2. Remove the air filters. 3. Vacuum or wash and then dry them. 4. Reinstall the air filters and close the air inlet grille.
Filter Maintenance & Shelf-life Clean every 3-6 months when dust tuck or covers the filter.
1. Recommend to use vacuum to clean by sucking the dusts which stick or dip inside the filter or use the blower to blow the dust go out through the filter. 2. If necessary to use water to clean, simply use the plain water to wash the filter, dry with the sunlight for 3-4 hours or until it completely dry.
Nevertheless, use hair drier to dry it. However, washing with water, it may reduce the performance of the filter. 3. Replace every 2 years or sooner. (contact your dealer to purchase new filter) (P/N : RB-A623DA) Note: Filter life depends on the level of impurities in your operating environment. Higher levels of impurities may require more frequent cleaning and
replacement. In all cases, we recommend an additional set of filters to improve the purifying and deodorizing performance of your air conditioner.

Filter

5

INSTALLATION DIAGRAM OF INDOOR AND OUTDOOR UNITS

300 mm or more

Hook

1 Installation
plate

Hook

170 mm or more

Air filter

Shield pipe

Batteries
3

(Attach to the front panel.)
5
Filter Flat head
7 wood screw

Refrigerant piping must be protected from physical damage. Install a plastic cover or equivalent.
Vinyl tape Apply after carrying out a drainage test.

600 mm or more

2 Wireless
remote control

4 Remote control
holder 100 mm or more
600 mm or more

100 mm or more

Saddle

Extension drain hose (Not available, provided by installer)
600 mm or more

50 mm or more

For the rear left, bottom left and left piping Wall

Cut out a piece of SPACER from indoor unit packaging box, roll it and insert between the indoor unit and wall to tilt the indoor unit for better operation.
The auxiliary piping can be connected to the left, rear left, rear right, right, bottom right or bottom left.

Right
Rear right
Bottom right

Rear left

Left Bottom left

Do not allow the drain hose to get slack.
Cut the piping hole sloped slightly.

Make sure to run the drain hose sloped downward.
Insulate the refrigerant pipes separately with insulation, not together.

8 mm thick heat resisting polyethylene foam

Optional Installation Parts

Part code

Parts name

Refrigerant piping A Liquid side : Ø6.35 mm
Gas side : Ø12.70 mm

B

Pipe insulating material (polyethylene foam, 8 mm thick)

C Putty, PVC tapes

Q’ty
One each
1
One each

340 mm 320 mm
86 mm 102 mm 350 mm 330 mm 106 mm 121 mm

Fixing bolt arrangement of outdoor unit
Secure the outdoor unit with fixing bolts and nuts if the unit is likely to be exposed to a strong wind.
Use Ø8 mm or Ø10 mm anchor bolts and nuts. If it is necessary to drain the defrost water, attach drain nipple # and cap
water proof $ to the bottom plate of the outdoor unit before installing it.

28 mm

108 mm

125 mm Air inlet

29 mm

125 mm

108 mm

Air inlet

Air outlet 600 mm

90 mm
Drain outlet

Air outlet 600 mm

99 mm
Drain outlet

RAS-18, 22J2AVSG-E1

RAS-24J2AVSG-E1

When using a multi-system outdoor unit, refer to the installation manual provided with the model concerned.

6

INDOOR UNIT

Installation Place

A place which provides the spaces around the indoor unit as shown in the GLDJUDm
A place where there are no obstacles near the air inlet and outlet A place which allows easy installation of the SLSLQJ to the outdoor unit A place which allows the front panel to be opened The indoor unit shall be installed at least 2.5 m KHLJKt. Also, it must be
avoided to put anytKLQJ on the top of the indoor unit.

CAUTION
‘LUHFWVXQOLJKWWRWKHLQGRRUXQLW’s wireless receiver should be avoided. The microprocessor in the indoor unit should not be too close to RF
noise sources. (For details, see the owner’s manual.)

Remote control
A place where there are no obstacles such as a curtain that may block the VLJQDOIURPWKHLQGRRUXQLW
‘RQRWLQVWDOOWKHUHPRWHFRQWUROLQDSODFHH[SRVHGWRGLUHFWVXQOLJKWRU FORVHWRDKHDWLQJVRXUFHVXFKDVDVWRYH
Keep the remote control at least 1 m apart from the nearest TV set or VWHUHRHTXLSPHQW7KLVLVQHFHVVDUWRSUHYHQWLPDJHGLVWXUEDQFHVRU noise interference.)
The location of the remote control should be determined as shown below.

Indoor unit

(Side view)

60°
Reception UDQJe

Remote control

Reception UDQJe

(Top view) Indoor unit 45° 45°
Remote control

Cutting a Hole and Mounting Installation Plate
Cutting a hole
:KHQLQVWDOOLQJWKHUHIULJHUDQWSLSHVIURPWKHUHDU

m from the right side edge is e center of pipe hole

35

120

180

240

23 mm

Pipe hole Ø65 mm
The center of the pipe hole is above the arrow.
1. $IWHUGHWHUPLQLQJWKHSLSHKROHSRVLWLRQRQWKHPRXQWLQJSODWH ), drill WKHSLSHKROHPPDWDVOLJKWGRZQZDUGVODQWWRWKHRXWGRRUVLGH
NOTE
When GULOOLQJ a wall that contains a metal lath, wire lath or metal plate, be sure to use a pipe hole brim ULQJ sold separately.
Mounting the installation plate

300 85

Anchor bolt holes +RRk

50 40

170 132 23

Space allows for PRYLQJ UDQJH of the air inlet JULOOH and KRUL]RQtal louver in operation above curtain rails, window cornice or other objects.
(Unit : mm)
455

40

40 50

$LULQOHWJULOOH

320

Distance between
bottom of indoor unit WRPD[LPXPKRUL]RQWDO ORXYHURSHQLQJ

+RUL]RQWDOORXYHU

160

55

Curtain rails, window cornice or other objects

CAUTION
If have curtain rails, window cornice or other objects, allow space from the indoor unit should be 55 mm or more.
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It will block the air flow direction and drop performance.

When the installation plate is directly mounted on the wall
1. Securely fit the installation plate onto the wall by VFUHZLQJ it in the upper and lower parts to hook up the indoor unit.
2. To mount the installation plate on a concrete wall with anchor bolts, use the anchor bolt holes as illustrated in the below fiJXUH.
3. Install the installation plate KRUL]RQtally in the wall.
CAUTION
When instDOOLQJ the installation plate with a mountLQJ screw, do not use the anchor bolt holes. Otherwise, the unit may fall down and result in personal injury and property GDPDJH.

Installation plate .HHSKRUL]RQWDOGLUHFWLRQ
5 mm dia. hole

Anchor bolt
Projection 15 mm or less

Clip anchor (local parts)

6 0RXQWLQJVFUHZ
Ø4 mm x 25

CAUTION
Failure to firmly install the unit may result in personal injury and property GDPDJHLIWKHXQLWIDOOV
In case of block, brick, concrete or similar type walls, make 5 mm dia. holes in the wall.
Insert clip anchors for appropriate mountLQJ screws 6.
NOTE
Secure four corners and lower parts of the installation plate with 4 to 6 mountLQJ screws to install it.

Ø65 mm

Pipe hole

+RRk

Indoor unit

Thread WHLJKt

+RRk
6 MountinJ
screw

Pipe hole
1 Installation plate

7

Piping and Drain Hose Installation
Piping and drain hose forming

Since dewing results in a machine trouble, make sure to insulate both connecting pipes. (Use polyethylene foam as insulating material.) Rear right
Rear left
Bottom left

Left-hand connection with piping

Bend the connecting pipe so that it is laid within 43 mm above the wall surface. If the connecting pipe is laid exceeding 43 mm above the wall surface, the indoor unit may unstably be set on the wall. When bending the connecting pipe, make sure to use a spring bender so as not to crush the pipe.
Bend the connecting pipe within a radius of 30 mm. To connect the pipe after installation of the unit (figure)
(To the forefront of flare)

520 mm 420 mm

Gas side Liquid side

Die-cutting front panel slit
Changing drain hose Piping preparation
43 mm

Left

Bottom right Right

Outward form of indoor unit
R 30 mm (Use polisin (polyethylene) core or the like for bending pipe.)

1. Die-cutting front panel slit Cut out the slit on the left or right side of the front panel for the left or right connection and the slit on the bottom left or right side of the front panel for the bottom left or right connection with a pair of nippers.
2. Changing drain hose For leftward connection, bottom-leftward connection and rear-leftward connection’s piping, it is necessary to change the drain hose and drain cap.

How to remove the drain hose
The drain hose can be removed by removing the screw securing the drain hose and then pulling out the drain hose.
When removing the drain hose, be careful of any sharp edges of steel plate. The edges can injuries.
To install the drain hose, insert the drain hose firmly until the connection part contacts with heat insulator, and then secure it with original screw.
How to remove the drain cap
Clip the drain cap by needle-nose pliers and pull out.

Drain hose

How to fix the drain cap

Insert hexagon wrench (4 mm) in a center head.
Firmly insert the drain cap.
Do not apply lubricating oil (refrigerant machine oil) when inserting the drain cap. Application causes deterioration and drain leakage of the plug.

No gap

Insert a hexagon wrench (4 mm).

CAUTION
Firmly insert the drain hose and drain cap; otherwise, water may leak.

In case of right or left piping

After scribing slits of the front panel with a knife or a making-off pin, cut them with a pair of nippers or an equivalent tool.

80

Use the handle of screwdriver, etc.

NOTE
If the pipe is bent incorrectly, the indoor unit may unstably be set on the wall. After passing the connecting pipe through the pipe hole, connect the connecting pipes to the auxiliary pipes and wrap the facing tape around them.

CAUTION
Bind the auxiliary pipes (two) and connecting cable with facing tape tightly. In case of leftward piping and rear-leftward piping, bind the auxiliary pipes (two) only with facing tape.

Auxiliary pipes

Indoor unit Connecting cable

Installation plate
Carefully arrange pipes so that any pipe does not stick out of the rear plate of the indoor unit.
Carefully connect the auxiliary pipes and connecting pipes to one another and cut off the insulating tape wound on the connecting pipe to avoid double- taping at the joint; moreover, seal the joint with the vinyl tape, etc.
Since dewing results in a machine trouble, make sure to insulate both connecting pipes. (Use polyethylene foam as insulating material.)
When bending a pipe, carefully do it, not to crush it.

Indoor Unit Fixing
1. Pass the pipe through the hole in the wall and hook the indoor unit on the installation plate at the upper hook.
2. Swing the indoor unit to right and left to confirm that it is firmly hooked up on the installation plate.
3. While pressing the indoor unit onto the wall, hook it at the lower part on the installation plate. Pull the indoor unit toward you to confirm that it is firmly hooked up on the installation plate.
Hook here. 1
1 Installation plate

2 Hook

Press (unhook)

Slit
In case of bottom right or bottom left piping
After scribing slits of the front panel with a knife or a making-off pin, cut them with a pair of nippers or an equivalent tool.
Slit

For detaching the indoor unit from the installation plate, pull the indoor unit toward you while pushing its bottom up at the specified parts.
Push
Information
The lower part of indoor unit may float, due to the condition of piping and you cannot fix it to the installation plate. In that case, use the ! screws provided to fix the unit and the installation plate.

Push
! Screw

8

Drainage

1. Run the drain hose sloped downwards.

NOTE

The hole should be made at a slight downward slant on the outdoor side.

Do not rise the drain hose.

Do not form the drain hose into a wavy shape.

50 mm or more

Do not put the drain hose end into water.

Do not put the drain hose end in the drainage ditch.

2. Put water in the drain pan and make sure that the water is drained out of doors.
3. When connecting extension drain hose, insulate the connecting part of extension drain hose with shield pipe.
Shield pipe

Drain hose

Inside the room

Extension drain hose

CAUTION
Arrange the drain pipe for proper drainage from the unit. Improper drainage can result in dew-dropping.

This air conditioner has the structure designed to drain water collected from dew, which forms on the back of the indoor unit, to the drain pan. Therefore, do not store the power cord and other parts at a height above the drain guide.

Wall Drain guide

Space for pipes

OUTDOOR UNIT

Installation Place

A place which provides the spaces around the outdoor unit as shown in the diagram
A place which can bear the weight of the outdoor unit and does not allow an increase in noise level and vibration
A place where the operation noise and discharged air do not disturb your neighbors
A place which is not exposed to a strong wind A place free of a leakage of combustible gases A place which does not block a passage When the outdoor unit is to be installed in an elevated position, be sure to
secure its feet.
The allowable length of the connecting pipe.

Model

RAS-18J2AVSG-E1 RAS-22J2AVSG-E1 RAS-24J2AVSG-E1

Chargeless

Up to 15 m

Maximum length

20 m

25 m

Additional refrigerant charging

16 – 20 m (20 g / 1 m)

16 – 25 m (20 g / 1 m)

Maximum refrigerant charging

1.2 kg

1.34 kg

The allowable height of outdoor unit installation site.

Model

RAS-18J2AVSG-E1 RAS-22J2AVSG-E1 RAS-24J2AVSG-E1

Maximum height

12 m

15 m

A place where the drain water does not raise any problems

Precautions for adding refrigerant

Use a scale having a precision with at least 10 g per index line when adding the refrigerant. Do not use a bathroom scale or similar instrument.

CAUTION
When the outdoor unit is installed in a place where the drain water might cause any problems, Seal the water leakage point tightly using a silicone adhesive or caulking compound.

Front
Anchor bolts

Snow protection plate
Snow protection hood Install at least 50 cm above the snow accumulation line.
At least 50 cm Snow accumulation line
Holding frame

CAUTION

1. Install the outdoor unit without anything blocking the air discharging.

2. When the outdoor unit is installed in a place always exposed to strong

wind like a coast or on a high storey of a building, secure the normal

fan operation using a duct or a windshield.

3. In particularly windy areas, install the unit such as to avoid admission

of wind.

4. Installation in the following places may result in trouble.

Do not install the unit in such places.

A place full of machine oil

A saline-place such as the coast

A place full of sulfide gas

A place where high-frequency waves are likely to be generated

Strong wind

as from audio equipment, welders,

and medical equipment

Precautions about Installation in Regions with Snowfall and Cold Temperatures
Do not use the supplied drain nipple for draining water. Drain the water from all the drain holes directly.
To protect the outdoor unit from snow accumulation, install a holding frame, and attach a snow protection hood and plate.

Do not use a double-stacked design.

9

Draining the Water

Refrigerant Piping Connection

Holes are provided on the base plate of the outdoor unit to ensure that the defrost water produced during heating operations is drained off efficiently. If a centralized drain is required when installing the unit on a balcony or wall, follow the steps below to drain off the water.
1. Proceed with water-proofing by installing the water-proof rubber caps in the 2 elongated holes on the base plate of the outdoor unit. [How to install the water-proof rubber caps] 1) Place four fingers into each cap, and insert the caps into the water drain holes by pushing them into place from the underside of the base plate. 2) Press down on the outer circumferences of the caps to ensure that they have been inserted tightly. (Water leaks may result if the caps have not been inserted properly, if their outer circumferences lift up or the caps catch on or wedge against something.)
Water-proof rubber caps (supplied with the outdoor unit)

Drain nipple

Base plate

2. Install the drain nipple and a commercially available drain hose (with 16 mm inside diameter), and drain off the water. (For the position where the drain nipple is installed, refer to the installation diagram of the indoor and outdoor units.) Check that the outdoor unit is horizontal, and route the drain hose at a downward sloped angle while ensuring that it is connected tautly.

Base plate

Drain nipple

Commercially available drain hose

Flaring
1. Cut the pipe with a pipe cutter.

90

Obliquity

Roughness

Warp

2. Insert a flare nut into the pipe and flare the pipe. Projection margin in flaring : A (Unit : mm)
RIDGID (clutch type)

Outer dia. of copper pipe
Ø6.35 Ø9.52 Ø12.70 Pipes thickness

R32 tool used

Conventional tool used

0 to 0.5

1.0 to 1.5

0 to 0.5

1.0 to 1.5

0 to 0.5

1.0 to 1.5

0.8 mm or more

IMPERIAL (wing nut type)
A
Outer dia. of copper pipe

Tool used

Ø6.35

1.5 to 2.0

Die

Pipe

Ø9.52

1.5 to 2.0

Ø12.70

2.0 to 2.5

Pipes thickness

0.8 mm or more

CAUTION
Do not scratch the inner surface of the fared part when removing burrs. Flare processing under the condition of scratches on the inner surface of
fare processing part will cause refrigerant gas leak.

Tightening connection

Align the centers of the connecting pipes and tighten the flare nut as far as possible with your fingers. Then tighten the nut with a spanner and torque wrench as shown in the figure.

Half union

Flare nut

Externally threaded side

Internally threaded side

Use a wrench to secure.

Use a torque wrench to tighten.

Do not use ordinary garden hose, but one can flatten and prevent water from draining.

CAUTION
Do not apply excess torque. Otherwise, the nut may crack depending on the conditions.

Outer dia. of copper pipe Ø6.35 mm Ø9.52 mm Ø12.70 mm

(Unit : N·m)
Tightening torque 16 to 18 (1.6 to 1.8 kgf·m) 30 to 42 (3.0 to 4.2 kgf·m) 50 to 62 (5.0 to 6.2 kgf·m)

Tightening torque of flare pipe connections The operating pressure of R32 or R410A is higher than that of R22 (approx. 1.6 times). It is therefore necessary to firmly tighten the flare pipe connecting sections (which connect the indoor and outdoor units) up to the specified tightening torque. Incorrect connections may cause not only a gas leakage, but also damage to the refrigeration cycle.

Flare at indoor unit side
Flare at outdoor unit side

10

Evacuating

After the piping has been connected to the indoor unit, you can perform the air purge together at once.
AIR PURGE Evacuate the air in the connecting pipes and in the indoor unit using a vacuum pump. Do not use the refrigerant in the outdoor unit. For details, see the manual of the vacuum pump.

Using a vacuum pump
Be sure to use a vacuum pump with counter-flow prevention function so that inside oil of the pump does not flow backward into pipes of the air conditioner when the pump stops. (If oil inside of the vacuum pump enters the air conditioner, which use R32 or R410A, refrigeration cycle trouble may result.) 1. Connect the charge hose from the manifold valve to the service port of the
packed valve at gas side. 2. Connect the charge hose to the port of the vacuum pump. 3. Open fully the low pressure side handle of the gauge manifold valve. 4. Operate the vacuum pump to start evacuating. Perform evacuating for
about 15 minutes if the piping length is 20 meters. (15 minutes for 20 meters) (assuming a pump capacity of 27 liters per minute) Then confirm that the compound pressure gauge reading is 101 kPa (76 cmHg). 5. Close the low pressure side valve handle of the gauge manifold valve. 6. Open fully the valve stem of the packed valves (both gas and liquid sides). 7. Remove the charging hose from the service port. 8. Securely tighten the caps on the packed valves.

Compound pressure gauge 101 kPa
(76 cmHg)
Handle Low
Charge hose Connecting pipe

Pressure gauge
Manifold valve Handle High (Keep full closed)
Charge hose
Vacuum pump adapter for counter-flow prevention

Vacuum pump

Packed valve at gas side Service port (Valve core (Setting pin))
Packed valve at liquid side

Packed valve handling precautions

Open the valve stem all the way out, but do not try to open it beyond the stopper.

Pipe size of Packed Valve 12.70 mm and smallers 15.88 mm

Size of Hexagon wrench A = 4 mm A = 5 mm

Pump down process
1. Turn off the Air Conditioner system. 2. Connect the charge hose from the manifold valve to the service port of
the packed valve at gas side. 3. Turn on the Air Conditioner system in cooling operation more than
10 minutes. 4. Check the operating pressure of the system should be normal value.
(Ref. with product specification) 5. Release the valve rod cap of both service valves. 6. Use the Hexagon wrench to turning the valve rod of Liquid side fully
close. (*Make sure no entering air into the system) 7. Continue operate Air Conditioner system until and the gauge of manifold
dropped into the range of 0.5 – 0 kgf/cm² 8. Use the Hexagon wrench to turning the valve rod of Gas side fully close.
And turn off the Air Conditioner system immediately thereafter. 9. Remove the gauge manifold from the service port of the packed valve. 10. Securely tighten the valve rod cap to the both service valves.

CAUTION
Should be check the compressor operating condition while pumping down process. It must not any abnormal sound, more vibration. It is abnormal condition appears and must turn off the Air Conditioner immediately.

Securely tighten the valve cap with torque in the following table:

Cap Valve Rod Cap
Service Port Cap

Cap Size (H) H17 – H19 H22 – H30 H14 H17

Torque
14~18 N·m (1.4 to 1.8 kgf·m)
33~42 N·m (3.3 to 4.2 kgf·m)
8~12 N·m (0.8 to 1.2 kgf·m)
14~18 N·m (1.4 to 1.8 kgf·m)

CAUTION
KEEP IMPORTANT 7 POINTS FOR PIPING WORK. (1) Take away dust and moisture (inside of the connecting pipes). (2) Tighten the connections (between pipes and unit). (3) Evacuate the air in the connecting pipes using a VACUUM PUMP. (4) Check gas leak (connected points). (5) Be sure to fully open the packed valves before operation. (6) Reusable mechanical connectors and fared joints are not allowed indoors. When mechanical connectors are reused indoors, sealing parts shall be renewed. When fared joints are reused indoors, the fare part shall be refabricated. (7) Don’t operate air conditioner in case no refrigerant in the system.

Hexagon wrench is required.
A H Service Port Cap
Valve Rod Cap

11

ELECTRICAL WORKS

The power supply can be selected to connect to indoor unit or outdoor unit. Choose proper way and connect the power supply and connecting cable by follow the instruction as following.

Model
Power source Maximum running current Circuit breaker rating Power supply cable Connecting cable

RAS-B18G3KVSG-E RAS-B18G3KVSGB-E

RAS-B22G3KVSG-E RAS-B22G3KVSGB-E

RAS-B24G3KVSG-E RAS-B24G3KVSGB-E

50Hz, 220 240V Single phase

9.50 A

10.50 A

12.50 A

15 A

H07RN-F or 60245 IEC66 (2.5 mm2 or more)

Wiring Connection

Indoor unit
Wiring of the connecting cable can be carried out without removing the front panel. 1. Remove the air inlet grille.
Open the air inlet grille upward and pull it toward you. 2. Remove the terminal cover and cord clamp. 3. Insert the connecting cable (according to the local cords) into the pipe hole
on the wall. 4. Take out the connecting cable through the cable slot on the rear panel so
that it protrudes about 20 cm from the front. 5. Insert the connecting cable fully into the terminal block and secure it tightly
with screws. 6. Tightening torque : 1.2 N·m (0.12 kgf·m) 7. Secure the connecting cable with the cord clamp. 8. Fix the terminal cover, rear plate bushing and air inlet grille on the
indoor unit.
Front panel

Outdoor unit
1. Remove the valve cover, the electric parts cover and the cord clamp from the outdoor unit.
2. Connect the connecting cable to the terminal as identified by the matching numbers on the terminal block of indoor and outdoor unit.
3. Insert the power cord and the connecting cable carefully into the terminal block and secure it tightly with screws.
4. Use vinyl tape, etc. to insulate the cords which are not going to be used. Locate them so that they do not touch any electrical or metal parts.
5. Secure the power cord and the connecting cable with the cord clamp. 6. Attach the electric parts cover and the valve cover on the outdoor unit.
Terminals block

Air inlet grille

Screw

Cord clamp Screws Terminal cover

How to install the air inlet grille on the indoor unit
When attaching the air inlet grille, the contrary of the removed operation is performed.

Valve cover

12

In Case of Indoor Unit Connect With 1:1 Outdoor Unit

Connecting cable

Power Supply Input at Outdoor Unit Terminal Block (Recommend)

Indoor Unit

Outdoor Unit

Connecting cable connect to
Terminal block (L N 1 2 3)
Earth line

Stripping length of the connecting cable

50 mm 10 mm

Earth line

3 2 1
10 mm 70 mm

45 mm 10 mm 10 mm
60 mm 40 mm
10 mm 10 mm
50 mm

123 LN

Earth line

Connecting cable

Power cord

Power supply cable

Power Supply Input at Indoor Unit Terminal Block (Optional)

Indoor Unit

Outdoor Unit

Power supply cable connect to
Terminal block (L N 1 2 3)

Stripping length of the power supply cable

50 mm 10 mm

Earth line

123

45 mm 10 mm 10 mm
60 mm

Earth line

N
L 10 mm 70 mm

Earth line

Power supply cable

Connecting cable

Connecting cable connect to
Terminal block (L N 1 2 3)

Earth line

Stripping length of the connecting cable

50 mm 10 mm

Earth line

3

10 mm 70 mm

Power supply Connecting

cable

13

Power supply input Wiring Diagram for 1:1 Outdoor Unit

Power input at Outdoor Terminal Block (Recommend)

Indoor Terminal Block

Chassis

Outdoor Terminal Block

Chassis

Power input

Power input at Indoor Terminal Block (Optional)

Indoor Terminal Block

Chassis

Power input
Outdoor Terminal Block

Chassis

CAUTION
1. The power supply must be same as the rated of air conditioner. 2. Prepare the power source for exclusive use with air conditioner. 3. Circuit breaker must be used for the power supply line of this air conditioner. 4. Be sure to comply power supply and connecting cable for size and wiring method. 5. Every wire must be connected firmly. 6. Perform wiring works so as to allow a general wiring capacity. 7. Wrong wiring connection may cause some electrical part burn out. 8. Incorrect or incomplete wiring is carried out, it will cause an ignition or smoke. 9. This product can be connected to main power supply.
Connection to fixed wiring : A switch which disconnects all poles and has a contact separation at least 3 mm must be incorporated in the fixed wiring.

14

In Case of Indoor Unit Connect With Inverter Multi System (IMS)

Connecting cable

Power Supply Input at Outdoor Unit Terminal Block Indoor Unit

Outdoor Unit

Connecting cable connect to
Terminal block (L N 1 2 3)
Earth line

Stripping length of the connecting cable

50 mm 10 mm

Earth line

3 2 1
10 mm 70 mm

45 mm 10 mm 10 mm
60 mm 40 mm
10 mm 10 mm
50 mm

1(L) 2 3 LN

Earth line

Connecting cable

Power cord

Power supply input Wiring Diagram for Inverter Multi System (IMS) Power input at Outdoor Terminal Block

Indoor Terminal Block

CHASSIS

Outdoor Terminal Block

CHASSIS

Power input
CAUTION
1. The power supply must be same as the rated of air conditioner. 2. Prepare the power source for exclusive use with air conditioner. 3. Circuit breaker must be used for the power supply line of this air conditioner. 4. Be sure to comply power supply and connecting cable for size and wiring method. 5. Every wire must be connected firmly. 6. Perform wiring works so as to allow a general wiring capacity. 7. Wrong wiring connection may cause some electrical part burn out. 8. Incorrect or incomplete wiring is carried out, it will cause an ignition or smoke. 9. This product can be connected to main power supply.
Connection to fixed wiring : A switch which disconnects all poles and has a contact separation at least 3 mm must be incorporated in the fixed wiring.

15

Gas Leak Test
Check places for the indoor unit.

OTHERS
Test Operation
To switch the TEST RUN (COOL) mode, press [RESET] button for 10 seconds. (The beeper will make a short beep.)

Check places for the outdoor unit.
Check the flare nut connections for the gas leak with a gas leak detector or soap water.
Remote Control A-B Selection
When two indoor units are installed in the same room or adjacent two rooms, if operating a unit, two units may receive the remote control signal simultaneously and operate. In this case, the operation can be preserved by setting either one remote control to B setting. (Both are set to A setting in factory shipment.)
The remote control signal is not received when the settings of indoor unit and remote control are different.
There is no relation between A setting/B setting and A room/B room when connecting the piping and cables.
To separate using of remote control for each indoor unit in case of 2 air conditioner are installed near. Remote Control B Setup. 1. Press [RESET] button on the indoor unit to turn the air conditioner ON. 2. Point the remote control at the indoor unit. 3. Push and hold button on the Remote Control by the tip of the
pencil. “00” will be shown on the display (Picture 1). 4. Press MODE during pushing . “B” will show on the display
and “00” will disappear and the air conditioner will turn OFF. The Remote Control B is memorized (Picture 2). Note : 1. Repeat above step to reset Remote Control to be A.
2. Remote Control A have not “A” display. 3. Default setting of Remote Control from factory is A.

OPERATION / RESET Button
Auto Restart Function Setting
This product is designed so that, after a power failure, it can restart automatically in the same operating mode as before the power failure.
Information
The product is shipped with Auto Restart function in the ON position. Turn it OFF if this function is not required.
How to turn OFF the Auto Restart Function
Press and hold the [OPERATION] button on the indoor unit for 3 seconds (3 beep sounds but OPERATION lamp does not blink).
How to turn ON the Auto Restart Function
Press and hold the [OPERATION] button on the indoor unit for 3 seconds (3 beep sounds and OPERATION lamp blink 5 time/sec for 5 seconds).
NOTE
In case of ON timer or OFF timer are set, AUTO RESTART OPERATION does not activate.

1

2

Adhesion of B label (When setting to B) Be sure to adhere the B label ” on the cover terminal same as the below
figure.
Cover terminal

B
B Label
16

17

APPENDIX

Work instructions
The existing R22 and R410A piping can be reused for inverter R32 product installations.

WARNING
Confirming the existence of scratches or dents on the existing pipes and confirming the reliability of the pipe strength are conventionally referred to the local site. If the specified conditions can be cleared, it is possible to update existing R22 and R410A pipes to those for R32 models.

Basic conditions needed to reuse existing
pipes
Check and observe the presence of three conditions in the refrigerant piping works. 1. Dry (There is no moisture inside of the pipes.) 2. Clean (There is no dust inside of the pipes.) 3. Tight (There are no refrigerant leaks.)

Restrictions for use of existing pipes
In the following cases, the existing pipes should not be reused as they are. Clean the existing pipes or exchange them with new pipes. 1. When a scratch or dent is heavy, be sure to use new
pipes for the refrigerant piping works. 2. When the existing pipe thickness is thinner than the
specified “Pipe diameter and thickness,” be sure to use new pipes for the refrigerant piping works.
The operating pressure of R32 or R410A is high (1.6 times that of R22). If there is a scratch or dent on the pipe or a thinner pipe is used, the pressure strength may be inadequate, which may cause the pipe to break in the worst case. * Pipe diameter and thickness (mm)

Pipe outer diameter

Thickness

R32, R410A R22

Ø6.4 0.8

Ø9.5 0.8

Ø12.7 0.8

3. When the outdoor unit was left with the pipes disconnected, or the gas leaked from the pipes and the pipes were not repaired and refilled.
There is the possibility of rain water or air, including moisture, entering the pipe. 4. When refrigerant cannot be recovered using a refrigerant recovery unit.
There is the possibility that a large quantity of dirty oil or moisture remains inside the pipes.

5. When a commercially available dryer is attached to the existing pipes.
There is the possibility that copper green rust has been generated. 6. When the existing air conditioner is removed after refrigerant has been recovered. Check if the oil is judged to be clearly different from normal oil.
The refrigerator oil is copper rust green in color: There is the possibility that moisture has mixed with the oil and rust has been generated inside the pipe. There is discolored oil, a large quantity of residue, or a bad smell. A large quantity of shiny metal dust or other wear residue can be seen in the refrigerant oil. 7. When the air conditioner has a history of the compressor failing and being replaced.
When discolored oil, a large quantity of residue, shiny metal dust, or other wear residue or mixture of foreign matter is observed, trouble will occur. 8. When temporary installation and removal of the air conditioner are repeated such as when leased etc. 9. If the type of refrigerator oil of the existing air conditioner is other than the following oil (Mineral oil), Suniso, Freol-S, MS (Synthetic oil), alkyl benzene (HAB, Barrel-freeze), ester series, PVE only of ether series.
The winding-insulation of the compressor may deteriorate.

NOTE
The above descriptions are results have been confirmed by our company and represent our views on our air conditioners, but do not guarantee the use of the existing pipes of air conditioners that have adopted R32 or R410A in other companies.

Curing of pipes
When removing and opening the indoor or outdoor unit for a long time, cure the pipes as follows:
Otherwise rust may be generated when moisture or foreign matter due to condensation enters the pipes. The rust cannot be removed by cleaning, and new pipes are necessary.

Placement location
Outdoors
Indoors

Term
1 month or more Less than 1 month
Every time

Curing manner Pinching
Pinching or taping

Are there scratches or dents on the existing pipes?
NO
Is it possible to operate the existing air conditioner?
YES After the existing air conditioner is operated in cooling mode for approx. 30 minutes or longer,* recover the refrigerant. For cleaning the pipes and recovering oil
Refrigerant recovery: Pump down method

YES NO

Existing pipes: Cannot be used. Use new pipes.
Nitrogen gas pressure 0.5 MPa

Remove the existing air conditioner from the piping and carry out flushing (nitrogen pressure 0.5 MPa) to remove any remains inside of the pipe. Note: In case of twin pipes, also be sure to flush the
branching pipe.
Was largely discolored oil or a large quantity of remains discharged? (When the oil deteriorates,
the color of the oil changes to a muddy or black color.)
NO

(If there is discharge of remains, it is judged that a large quantity of remains are present.)

YES

Clean the pipes or use new pipes.

Connect the indoor / outdoor units to the existing pipe. Use a flare nut attached to the main unit for the indoor / outdoor units. (Do not use the flare nut of the existing pipe.) Re-machine the flare machining size to size for R32 or R410A.
(Airtight test), Vacuum dry, Refrigerant charge, Gas leak check
Test run

Piping necessary to change the flare nut / machining size due to pipe compression