Toshiba RAV-SM1603AT-E, RAV-SM1603ATZ-E, RAV-SM1603ATZG-E INSTALLATION MANUAL

AIR CONDITIONER (SPLIT TYPE)

Installation manual

Outdoor Unit

Model name:

RAV-SM1603AT-E RAV-SM1603ATZ-E RAV-SM1603ATZG-E

Not accessible to the general public

Vente interdite au grand public

Non accessibile a clienti generici

No destinado al público en general

Não acessível ao público em geral

Niet geschikt voor huishoudelijk gebruik

ȂȘ ʌȡȠıȕȐıȚȝȠ Įʌȩ ĲȠ ȖİȞȚțȩ țȠȚȞȩ

ɇɟɞɨɫɬɭɩɟɧ ɞɥɹ ɩɨɫɬɨɪɨɧɧɢɯ

Installation manual Air conditioner

(Split type)

Manuel d'installation Climatiseur

(Type split)

Installations-handbuch Klimagerät

(Split-typ)

Kein öffentlicher Zugang

Genel eriúime açık de÷ildir

English

Français

Deutsch

Manuale di installazione Condizionatore d’aria

(Tipo split)

Manual de instalación Aire acondicionado

(Tipo split)

Manual de Instalação Ar condicionado

(Tipo split)

121

Installatiehandleiding Airconditioner

ǼȖȤİȚȡȓįȚȠ İȖțĮĲȐıĲĮıȘȢ

(Gesplitst type)

145

ȀȜȚȝĮĲȚıĲȚțȩ (ȉȪ ʌ Ƞ ȣ Split) 169

Ɋɭɤɨɜɨɞɫɬɜɨ ɩɨ ɭɫɬɚɧɨɜɤɟ

Ʉɨɧɞɢɰɢɨɧɟɪ ɜɨɡɞɭɯɚ

(ɫɩɥɢɬ-ɫɢɫɬɟɦɚ) 193

Montaj Kılavuzu

Klima

(Split tip)

217

Italiano

Español

Português

Nederlands

ǼȜȜȘȞȚțȐ

Ɋɭɫɫɤɢɣ

Türkçe

Digital Inverter

Please read this Installation Manual carefully before installing the Air Conditioner.

• This Manual describes the installation method of the outdoor unit.

• For installation of the indoor unit, follow the Installation Manual attached to the indoor unit.

Outdoor Unit Installation Manual

ADOPTION OF NEW REFRIGERANT

This Air Conditioner is a new type which adopts a new refrigerant HFC (R410A) instead of the conventional refrigerant R22 in order to prevent destruction of the ozone layer.

Contents

1 ACCESSORY PARTS AND REFRIGERANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2 PRECAUTIONS FOR SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 INSTALLATION OF NEW REFRIGERANT AIR CONDITIONER . . . . . . . . . . . . . . . . . 4

4 SELECTION OF INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 REFRIGERANT PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

6 AIR PURGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7 ELECTRICAL WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

8 EARTHING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

9 FINISHING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

10 TEST RUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

11 ANNUAL MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

12 FUNCTIONS TO BE IMPLEMENTED LOCALLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

13 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

14 APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

1-EN

–1–

Digital Inverter



Outdoor Unit Installation Manual

1 ACCESSORY PARTS AND REFRIGERANT

Accessory parts

Part name Q’ty Shape Usage

Outdoor unit Installation manual

Drain nipple 1

Waterproof rubber cap 5

Protective bush 1 For protecting wires (pipe cover)

Guard material for passage part

Ferrite core 1

Clamp filter 1

Banding band 2

1 (Hand this directly to the customer.)

1 For protecting passage part (pipe cover)

For conforming to EMC standards for twin/triple systems Color: White (Used for indoor/outdoor connecting wires)

For conforming to EMC standards for twin/triple systems Color: Gray (Used for outdoor fan motor lead wire)

For conforming to EMC standards for twin/triple systems (For clamping the clamp filter and ferrite core)

Refrigerant Piping

• Piping kit used for the conventional refrigerant cannot be used.

• Use copper pipe with 0.8 mm or more thickness for Ø9.5 mm. Use copper pipe with 1.0 mm or more thickness for Ø15.9 mm.

• Flare nut and flare works are also different from those of the conventional refrigerant. Take out the flare nut attached to the air conditioner, and use it.

–2–

2-EN

Digital Inverter

2 PRECAUTIONS FOR SAFETY

• Ensure that all Local, National and International regulations are satisfied.

• Read this “PRECAUTIONS FOR SAFETY” carefully before Installation.

• The precautions described below include the important items regarding safety. Observe them without fail.

• After the installation work, perform a trial operation to check for any problem. Follow the Owner’s Manual to explain how to use and maintain the unit to the customer.

• Turn off the main power supply switch (or breaker) before the unit maintenance.

• Ask the customer to keep the Installation Manual together with the Owner’s Manual.

WARNING

•

Ask an authorized dealer or qualified installation professional to install/maintain the air conditioner.

Inappropriate installation may result in water leakage, electric shock or fire.

• Be sure to connect earth wire. (grounding work) Incomplete grounding cause an electric shock. Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone wires.

• Turn off the main power supply switch or breaker before attempting any electrical work. Make sure all power switches are off. Failure to do so may cause electric shock. Use an exclusive power circuit for the air conditioner. Use the rated voltage.

• Connect the connecting wire correctly. If the connecting wire is connected in a wrong way, electric parts may be damaged.

• When moving the air conditioner for the installation into another place, be very careful not to enter

any gaseous matter other than the specified refrigerant 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 may resultingly causes pipe burst and injuries on persons.

• Do not modify this unit by removing any of the safety guards or by by-passing any of the safety

interlock switches.

• After unpacking the unit, examine it carefully if there are possible damage.

• Do not install in a place that might increase the vibration of the unit.

• To avoid personal injury (with sharp edges), be careful when handling parts.

• Perform installation work properly according to the Installation Manual. Inappropriate installation may result in water leakage, electric shock or fire.

• When the air conditioner indoor unit is installed in a small room, provide appropriate measures to

ensure that the concentration of refrigerant leakage occur in the room does not exceed the critical level.

• Tighten the flare nut with a torque wrench in the specified manner. Excessive tightening of the flare nut may cause a crack in the flare nut after a long period, which may result in refrigerant leakage.

• Wear heavy gloves during the installation work to avoid injury.

• Install the air conditioner securely in a location where the base can sustain the weight adequately.

• Perform the specified installation work to guard against an earthquake. If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.

• If refrigerant gas has leaked during the installation work, ventilate the room immediately. If the leaked refrigerant gas comes in contact with fire, noxious gas may generate.

• After the installation work, confirm that refrigerant gas does not leak. If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas might generate.

• Electrical work must be performed by a qualified electrician in accordance with the Installation

Manual. Make sure the air conditioner uses an exclusive power supply.

An insufficient power supply capacity or inappropriate installation may cause fire.

• Use the specified wires for wiring connect the terminals securely fix.

To prevent external forces applied to the terminals from affecting the terminals.

Outdoor Unit Installation Manual

3-EN

–3–

Digital Inverter

• When the air conditioner cannot cool or heat a room well, contact the dealer from whom you purchased the air conditioner as refrigerant leakage is considered as the cause. In the case of repair that requires refill of refrigerant, ask service personnel about details of the repair.

The refrigerant used in the air conditioner is harmless. Generally, the refrigerant does not leak. However, if the refrigerant leaks in a room and a heater or stove burner in the room catches fire, it may generate toxic gas. When you ask service personnel for repairing refrigerant leakage, confirm that the leakage portion has been completely repaired.

• Conform to the regulations of the local electric company when wiring the power supply. Inappropriate grounding may cause electric shock.

• Do not install the air conditioner in a location subject to a risk of exposure to a combustible gas. If a combustible gas leaks, and stays around the unit, a fire may occur.

• Install the refrigerant pipe securely during the installation work before operating the air

conditioner.

If the compressor is operated with the valve open and without the refrigerant pipe, the compressor sucks air and the refrigeration cycle is overpressurized, which may cause a burst or injury.

• For the refrigerant recovery work (collection of refrigerant from the pipe to the compressor), stop

the compressor before disconnecting the refrigerant pipe.

If the refrigerant pipe is disconnected while the compressor is working with the valve open, the compressor sucks air and the refrigeration cycle is overpressurized, which may cause a burst or injury.

Outdoor Unit Installation Manual

WARNING

CAUTION

New Refrigerant Air Conditioner Installation

• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY OZONE LAYER.

• The characteristics of R410A refrigerant are ; easy to absorb water, oxidizing membrane or oil, and its pressure is approx. 1.6 times higher than that of refrigerant R22. Accompanied with the new refrigerant, refrigerating oil has also been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigerating oil does not enter the refrigerating cycle.

• To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of charging port of the main unit and installation tools are changed from those for the conventional refrigerant.

• Accordingly the exclusive tools are required for the new refrigerant (R410A).

• For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust does not enter.

To Disconnect the Appliance from Main Power Supply

• This appliance must be connected to the main power supply by means of a switch with a contact separation of at least 3 mm.

• The installation fuse 40 A (All type fuse can be used) must be used for the power supply line of this conditioner.

3 INSTALLATION OF NEW REFRIGERANT

AIR CONDITIONER

• The R410A refrigerant is more susceptible to impurities such as water, oxide membrane, oils, and fats. With the adoption of the new refrigerant, refrigerating oil has also been changed. Be careful so that water, dust, conventional refrigerant, and/or conventional refrigerating oil do not enter the refrigerating cycle of the new refrigerant air conditioner.

• To prevent different refrigerant or refrigerating oil being mixed, the sizes of the charging port of the unit and the installation tool connecting sections are different from the conventional refrigerant. Accordingly the following exclusive tools are required for the new refrigerant R410A.

–4–

4-EN

Digital Inverter



Required Tools/Equipment and Precautions for Use

Prepare the tools and equipment listed in the following table before starting installation work. Newly prepared tools and equipment must be used exclusively.

Legend

: Prepared newly (Use for R410A only. Do not use for refrigerant R22 or R407C etc..) : Conventional tools/equipment are available

Gauge manifold Vacuuming/charging

Charging hose Prepared newly for R410A only

Charging cylinder Can not be used

Gas leak detector Gas leak check Prepared newly

Vacuum pump with backflow prevention function

Flare tool Flare machining of pipes Usable if dimensions are adjusted.

Bender Bending pipes R22 (Conventional tools)

Refrigerant recovery equipment Refrigerant recovery For R410A only

Torque wrench Tightening flare nuts Exclusive for Ø12.7 mm and Ø15.9 mm

Pipe cutter Cutting pipes R22 (Conventional tools)

Refrigerant cylinder Charging refrigerant

Welding machine and nitrogen cylinder

Refrigerant charging measure Charging refrigerant R22 (Conventional tools)

Outdoor Unit Installation Manual

Tools/equipment Use How to use tools/equipment

Prepared newly for R410A only refrigerant and operation check

Unusable (Use the refrigerant charging measure instead.)

Vacuum drying Unusable

Vacuum drying R22 (Conventional tools)

For R410A only

Discriminated by the refrigerant name on the cylinder.

Welding pipes R22 (Conventional tools)

Refrigerant Piping

New refrigerant (R410A)

When using the conventional piping kit

• When using the conventional piping kit that has no indication of applicable refrigerant types, be sure to use it with a wall thickness of 0.8 mm for Ø6.4 mm, Ø9.5 mm, and Ø12.7 mm, and with a wall thickness of 1.0 mm for Ø15.9 mm. Never use the conventional piping kit with a wall thickness less than these thicknesses due to insufficient pressure capacity.

When using general copper pipes

• Use general copper pipes with a wall thickness of 0.8 mm for Ø6.4 mm, Ø9.5 mm, and Ø12.7 mm, and with a wall thickness of 1.0 mm for Ø15.9 mm. Never use any copper pipes with a wall thickness less than these thicknesses.

Flare nuts and flare machining

• The flare nuts and flare machining are different from those for the conventional refrigerant. Use the flare nuts supplied with the air conditioner or those for R410A.

• Before performing flare machining, carefully read “REFRIGERANT PIPING”

5-EN

–5–

Digital Inverter



Outdoor Unit Installation Manual

4 SELECTION OF INSTALLATION

Before installation

Be careful to the following items before installation.

Length of refrigerant pipe

Length of refrigerant

pipe connected to

indoor/outdoor unit

5 m to 30 m

*31 m to 50 m

* Caution at addition of refrigerant

When the total length of refrigerant pipe exceeds 30 m, add 40 g /m of refrigerant and the maximum total length of pipe is 50 m. (Max. amount of additional refrigerant is 800 g.) Charge the refrigerant accurately. Overcharge may cause a serious trouble of compressor.

* Do not connect a refrigerant pipe shorter than

5m. This may cause a malfunction of the compressor or other devices.

Airtight test

1. Before starting an airtight test, further tighten

the spindle valves on the gas side and liquid side.

2. Pressurize the pipe with nitrogen gas charged

from the service port to the design pressure (4.15 Mpa) to conduct the airtight test.

3. After the airtight test is completed, evacuate the

nitrogen gas.

Addition of refrigerant is unnecessary at the local site.

<Addition of refrigerant> Add 40 g of refrigerant for

every 1m of pipe which exceeds 30 m.

Item

Earthing

WARNING

Make sure that proper earthing is provided.

Improper earthing may cause electric shock. For how to check earthing, contact the dealer who installed the air conditioner or a professional installation company.

• Proper earthing can prevent charging of electricity on the outdoor unit surface due to high frequency of the frequency converter (inverter) in the outdoor unit, as well as prevent electric shock. If the outdoor unit is not properly earthed, you may feel electric shock.

• Be sure to connect earth wire. (grounding work)

Incomplete grounding cause an electric shock. Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone wires.

Test Run

Turn on the leakage breaker at least 12 hours before starting a test run to protect the compressor during startup.

CAUTION

Incorrect work may result in a malfunction or complaints of customers.

Air purge

• For air purge, use a vacuum pump.

• Do not use refrigerant charged in the outdoor unit for air purge. (The refrigerant for air purge is not contained in the outdoor unit.)

Electrical wiring

• Be sure to fix the power wires and indoor/ outdoor connecting wires with clamps so that they do not contact with the cabinet, etc.

–6–

6-EN

Digital Inverter



Installation Place

Outdoor Unit Installation Manual

CAUTION

WARNING

Install the outdoor unit properly at a place that is durable enough to the weight of the outdoor unit.

Insufficient durability may cause the outdoor unit to fall, which may result in injury.

CAUTION

Do not install the outdoor unit at a place subject to combustible gas leak.

Accumulation of combustible gas around the outdoor unit may cause a fire.

Install the outdoor unit at a place that meets the following conditions after customer’s consent is obtained.

• A well-ventilated place free from obstacles near the air inlets and air outlet

• A place that is not exposed to rain or direct sunlight

• A place that does not increase the operating noise or vibration of the outdoor unit

• A place that does not cause any drainage problem with discharged water

Do not install the outdoor unit at the following places.

• A place full of saline atmosphere (coastal area) or sulfide gas (hot-spring area) (Special maintenance is required.)

• A place subject to oil, vapor, oily smoke, or corrosive gas

• A place where organic solvent is used

• A place where high-frequency equipment (including inverter equipment, private power generator, medical equipment, and communication equipment) is used (Installation in this place may cause malfunction of the air conditioner, abnormal control or problems due to noise to such equipment.)

• A place where the discharged air of the outdoor unit blows against the window of the neighboring house

• A place where the operating noise of the outdoor unit is transmitted

• When the outdoor unit is installed in an elevated position, be sure to secure its feet.

• A place where the drain water does not make any problem.

1. Install the outdoor unit at a place where discharge air is not blocked.

2. When an outdoor unit is installed in a place that is always exposed to a strong wind like a coast or on a high storey of a building, secure a normal fan operation by using a duct or a wind shield.

3. When installing the outdoor unit in a place that is constantly exposed to a strong wind such as the upper stairs or rooftop of a building, apply the windproof measures referring to the following examples.

1) Install the unit so that its discharge port

faces to the wall of the building. Keep a distance 500 mm or more between the unit and the wall surface.

500

2) Supposing the wind direction during the

operation season of the air conditioner, install the unit so that the discharge port is set at right angle to the wind direction.

Strong

Strong wind

• When using an air conditioner under low outside

temperature condition (Outside temp.:-5 °C or lower) with COOL mode, prepare a duct or wind shield so that it is not affected by the wind.

Wind shield

wind

Wind shield

7-EN

–7–

Digital Inverter



Necessary Space for Installation (Unit:mm)

Outdoor Unit Installation Manual

Obstacle at rear side

▼ Upper side is free

1. Single unit installation

150

or more

2. Obstacles at both right and left sides.

200

or more

150

or more

3. Serial installation of two or more units

The height of the obstacle should be lower than the height of the outdoor unit.

300

or more

Obstacle at front side

▼ Upper side is free

1. Single unitIn installation

500

or more

2. Serial installation of two or more units

▼ Obstacle also at the upper side

1000

or more

1000

or more

1000

or more

150

or more

The height of the obstacle should be lower than the height of the outdoor unit.

300

or more

300

or more

▼ Obstacle also at the upper side

150

or more

500

or more

300

or more

200 or more

Obstacles at both front and rear sides

Open the upper side and both right and left sides. The height of obstacle at both front and rear side, should be lower than the height of the outdoor unit.

▼ Standard installation

1. Single unit installation

150

or more

1000

or more

–8–

8-EN

Digital Inverter



Outdoor Unit Installation Manual

2. Serial installation of two or more units

200

or more

300

or more

300

or more

1000

or more

Serial installation at front and rear sides

Open the upper side and both right and left sides. The height of obstacle at both front and rear sides

should be lower than the height of the outdoor unit.

▼ Standard installation

1000

or more

Installation of Outdoor Unit

• Before installation, check strength and horizontality of the base so that abnormal sound does not generate.

• According to the following base diagram, fix the base firmly with the anchor bolts. (Anchor bolt, nut: M10 x 4 pairs)

300

or more

150

1500

or more

Drain hole

2000

or more

525

600

200

or more

150

• As shown in the figure below, install the foundation and vibration-proof rubbers to directly support the bottom surface of the fixing leg that is in contact with the bottom plate of the outdoor unit.

* When installing the foundation for an outdoor

unit with downward piping, consider the piping work.

GOOD

Absorb vibration

Fixing leg

Foundation

with vibration-

proof rubbers

GOOD

Bottom plate

of outdoor unit

Foundation

Support the bottom surface of the fixing leg in contact with the bottom plate of the outdoor unit.

If only the end of the fixing leg is supported, it may be deformed.

Foundation

NO GOOD

Set the out margin of the anchor bolt to 15 mm or less.

Do not support the outdoor unit only with the fixing leg.

15 or less

9-EN

400

365

Drain nipple mounting hole

Drain hole

–9–

Digital Inverter



• In case of drainning through the drain hose, attach the following drain nipple and the waterproof rubber cap, and use the drain hose (Inner diam.: 16 mm) sold on the market. And also seal the screws securely with silicone material, etc. so that water does not drop down. Some conditions may cause dewing or dripping of water.

• When collectively draining discharged water completely, a drain pan must be made locally.

Outdoor Unit Installation Manual

Drain nipple

For Reference

If a heating operation would be continuously performed for a long time under the condition that the outdoor temperature is 0 °C or lower, draining of defrosted water may be difficult due to freezing of the bottom plate, resulting in a trouble of the cabinet or fan. It is recommended to procure an anti-freeze heater locally for a safety installation of the air conditioner.

For details, contact the dealer.

Waterproof rubber cap (5pcs.)

Drain nipple

Waterproof rubber cap

–10–

10-EN

Digital Inverter



5 REFRIGERANT PIPING

Outdoor Unit Installation Manual

Knockout of Pipe Cover

Rear direction

Pipe cover

Side direction

Front direction

Down direction

Knockout procedure

• The indoor/outdoor connecting pipes can be connected to 4 directions. Take off the knockout part of the pipe cover in which pipes or wires pass through the base plate.

• Detach the piping cover and give an impact on the knockout section a few times with the shank of a screwdriver. A knockout hole can easily be punched.

• After punching the knockout hole, remove burrs of the hole and then install the supplied protective bush and guard material for passage part to protect wires and pipes. Be sure to attach the pipe covers after pipes have been connected. Cut the slits under the pipe covers to facilitate the installation.

After connecting the pipes, be sure to mount the pipe cover. The pipe cover is easily mounted by cutting off the slit at the lower part of the pipe cover.

Optional Installation Parts (Local Procure)

Parts name Q’ty

Refrigerant piping

Liquid side : Ø9.5 mm Gas side : Ø15.9 mm

Pipe insulating material

(polyethylene foam, 10 mm thick)

C Putty, PVC tapes Each one

Refrigerant Piping

Each one

Connection

CAUTION

TAKE NOTICE THESE IMPORTANT 4 POINTS BELOW FOR PIPING WORK

1. Keep dust and moisture away from inside the connecting pipes.

2. Tightly connect the connection between pipes and the unit.

3. Evacuate the air in the connecting pipes using VACUUM PUMP.

4. Check gas leak at connected points.

▼ Piping connection

Liquid side Gas side

Outer

diameter

Ø9.5 mm 0.8 mm Ø15.9 mm 1.0 mm

Thickness

Flaring

1. Cut the pipe with a pipe cutter.

Be sure to remove burrs that may cause gas leak.

2. Insert a flare nut into the pipe, and then flare

the pipe. Use the flare nuts supplied with the air conditioner or those for R410A.

Insert a flare nut into the pipe, and flare the pipe. As the flaring sizes of R410A differ from those of refrigerant R22, the flare tools newly manufactured for R410A are recommended.

Outer

diameter

Thickness

11-EN

* Be sure to wear heavy work gloves while

working.

–11–

Digital Inverter



Outdoor Unit Installation Manual

However, the conventional tools can be used by adjusting projection margin of the copper pipe.

▼ Projection margin in flaring : B (Unit : mm)

Rigid (Clutch type)

Outer diam. of

copper pipe

15.9

R410A tool

used

R410A

0 to 0.5

Conventional

tool used

1.0 to 1.59.5

▼ Flaring diam. meter size : A (Unit : mm)

Outer diam. of copper

pipe

9.5 13.2

15.9 19.7

* In case of flaring for R410A with the

A+0 ~ A–0.4

conventional flare tool, pull it out approx.

0.5 mm more than that for R22 to adjust to the specified flare size. The copper pipe gauge is useful for adjusting projection margin size.

Tightening of Connecting Part

1. Align the centers of the connecting pipes and fully tighten the flare nut with fingers. Then fix the nut with a spanner as shown in the figure and tighten it with a torque wrench.

2. As shown in the figure, be sure to use two spanners to loosen or tighten the flare nut of the valve on the gas side. If you use a single spanner, the flare nut cannot be tightened to the required tightening torque. On the other hand, use a single spanner to loosen or tighten the flare nut of the valve on the liquid side.

Outer dia. of copper

Half union or packed valve Flare nut

pipe

9.5 mm (diam.) 33 to 42 (3.3 to 4.2 kgf•m)

15.9 mm (diam.) 68 to 82 (6.8 to 8.2 kgf•m)

Externally threaded side

Fix with spanner. Tighten with torque wrench.

Tightening torque

(Unit: N•m)

Internally threaded side

Cap

Loosened

Cover

Piping valve

Tightened

Flare nut

Valve at gas side

–12–

12-EN

Digital Inverter



Outdoor Unit Installation Manual

CAUTION

1. Do not put the spanner on the cap or cover.

The valve may be broken.

2. If applying excessive torque, the nut may be broken according to some installation conditions.

• After the installation work, be sure to check gas leak of connecting part of the pipes with nitrogen.

NO GOOD

Cover

Cap

Refrigerant Pipe Length

• Pressure of R410A is higher than that of R22 (Approx. 1.6 times). Therefore, using a torque wrench, tighten the flare pipe connecting sections which connect the indoor/outdoor units at the specified tightening torque. Incomplete connections may cause not only a gas leak, but also a trouble of the refrigeration cycle.

Do not apply refrigerating machine oil to the flared surface.

Single

Allowable pipe length (m)

Total length L Indoor unit: Upper Outdoor unit: Lower Gas side Liquid side

50 30 30 Ø15.9 Ø9.5

Height difference (Indoor-outdoor H) (m) Pipe diameter (mm)

Simultaneous twin, triple

Allowable pipe length (m) Height difference (m) Pipe diameter (mm) Number of

Total

System

TRIPLE 50 15 10 30 30 0.5

length

1 + 2

•

• 1 + 3

• 1 + 4 Maximum

TWIN 50 15 10 30 30 0.5

Distributed pipes

2 • 4

•

• 3 Maximum

Distributed pipes

3 – 2

•

• 4 – 3

• 4 – 2 Maximum

Figure of Single Figure of Simultaneous twin

Indoor Unit

Indoor-outdoor H Indoor-

Indoor unit: Upper

Outdoor unit: Upper

indoor ('h)

Indoor Unit

Main pipe Branching pipe

Gas side Liquid

Ø15.9

side

Ø9.5

Figure of Simultaneous triple

Indoor Unit

Number of bent portions

10 or less

Gas side Liquid

Ø15.9

Ø12.7

side

Ø9.5

Ø6.4

bent portions

10 or less

Indoor Unit

13-EN

Distributor

Outdoor UnitOutdoor UnitOutdoor Unit

Distributor

–13–

Digital Inverter



6 AIR PURGING

Airtight test

Before starting an airtight test, further tighten the spindle valves on the gas side and liquid side. Pressurize the pipe with nitrogen gas charged from the service port to the design pressure (4.15 Mpa) to conduct the airtight test. After the airtight test is completed, evacuate the nitrogen gas.

Air Purge

With respect to the preservation of terrestrial environment, adopt “Vacuum pump” for air purge (Evacuate air in the connecting pipes) when installing the unit.

• Do not discharge the refrigerant gas to the atmosphere to preserve the terrestrial environment.

• Use a vacuum pump to discharge the air (nitrogen, etc.) remained in the set. If the air remains, the capacity may decrease.

For the vacuum pump, be sure to use one with backflow preventer so that the oil in the pump does not backflow into the pipe of the air conditioner when the pump stops. (If oil in the vacuum pump is put in an air conditioner including R410A, it may cause trouble on the refrigeration cycle.)

Outdoor Unit Installation Manual

Vacuum pump

As shown in the figure, connect the charge hose after the

projection to push the valve core (setting pin) to the charge

Loosen the flare nut of the packed valve (Gas side) a little to

Execute vacuuming until the compound pressure gauge

Leave the vacuum pump as it is for 1 or 2 minutes, and check

the indicator of the compound pressure gauge does not

Open fully the valve stem or the valve handle. (First, at liquid

manifold valve are closed completely.

Attach the connecting port of the charge hose with a

port of the set.

Open handle Low fully.

Turn ON the vacuum pump (*1)

check the air passes through. (*2)

Tighten the flare nut again.

indicates –101kPa (–76cmHg). (*1)

Close handle Low completely.

Turn OFF the vacuum pump.

return.

side, then gas side)

(continued)

Disconnect the charge hose from the charge port.

Tighten valve and caps of the charge port surely.

*1Use the vacuum pump, vacuum pump adapter,

and gauge manifold correctly referring to the manuals supplied with each tool before using them. Check that the vacuum pump oil is filled up to the specified line of the oil gauge.

When air is not charged, check again whether the connecting port of the discharge hose, which has a projection to push the valve core, is firmly connected to the charge port.

Compound pressure gauge

–101 kPa (–76 cmHg)

Handle Lo

Charge hose (For R410A only)

Charge port (Valve core (Setting pin))

Packed valve at gas side

Pressure gauge

Gauge manifold valve

Handle Hi (Keep fully closed)

Charge hose (For R410A only)

Vacuum pump adapter for counter-flow prevention (For R410A only)

Vacuum

pump

–14–

14-EN

+ 35 hidden pages