AIR CONDITIONER

Outdoor Unit

R32

R32.

1. SAFETY PRECAUTIONS

• Be sure to read this manual thoroughly before installation.

• The warnings and precautions indicated in this manual contain important information pertaining to your safety. Be sure to observe them.

• Hand this manual, together with the operating manual, to the customer. Request the customer to keep them on hand for future use, such as for relocating or repairing the unit.

WARNING

Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION

Indicates a potentially hazardous situation that may result in minor or moderate injury or damage to property.

9319205298-02_IM_EN.indd 1

For authorized service personnel only.

Contents

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

1.1. Precautions for using R32 refrigerant ......................................................2

2. PRODUCT SPECIFICATION .............................................................................3

2.1. Installation tools .......................................................................................3

2.2. Accessories .............................................................................................4

2.3. Pipe requirements ...................................................................................4

2.4. Electrical requirements ............................................................................4

2.5. Additional charge amount ........................................................................4

2.6. Operating range .......................................................................................5

3. INSTALLATION WORK ......................................................................................5

3.1. Installation dimensions ............................................................................5

3.2. Mounting the unit .....................................................................................6

3.3. Removing and replacing part ...................................................................6

3.4. Drain installation ......................................................................................7

3.5. Pipe installation .......................................................................................7

3.6. Sealing test ..............................................................................................8

3.7. Vacuum process ......................................................................................8

3.8. Additional charging ..................................................................................8

3.9. Electrical wiring ........................................................................................9

4. TEST RUN ........................................................................................................10

5. FINISHING .......................................................................................................10

5.1. Installing insulation ................................................................................10

6. PUMP DOWN ...................................................................................................10

INSTALLATION MANUAL

PART No. 9319205298-02

WARNING

• Installation of this product must be done by experienced service technicians or professional installers only in accordance with this manual. Installation by nonprofessional or improper installation of the product may cause serious accidents such as injury, water leakage, electric shock, or fire. If the product is installed in disregard of the instructions in this manual, it will void the manufacturer’s warranty.

• To avoid getting an electric shock, never touch the electrical components soon after the power supply has been turned off. After turning off the power, always wait 10 minutes or more before you touch the electrical components.

• Do not turn on the power until all work has been completed. Turning on the power before the work is completed can cause serious accidents such as electric shock or fire.

• If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contact with a flame, it produces a toxic gas.

• Installation must be performed in accordance with regulations, codes, or standards for electrical wiring and equipment in each country, region, or the installation place.

• Do not use this equipment with air or any other unspecified refrigerant in the refrigerant lines. Excess pressure can cause a rupture.

• During installation, make sure that the refrigerant pipe is attached firmly before you run the compressor.

Do not operate the compressor under the condition of refrigerant piping not attached properly with 3-way valve open. This may cause abnormal pressure in the refrigeration cycle that leads to rupture and even injury.

• When installing or relocating the air conditioner, do not mix gases other than the specified refrigerant (R32) to enter the refrigerant cycle.

If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an abnormally high value and cause rupture, injury, etc.

• To connect the indoor unit and outdoor unit, use air conditioner piping and cables available locally as standard parts. This manual describes proper connections using such installation set.

• Do not modify power cable, use extension cable or branch wiring. Improper use may cause electric shock or fire by poor connection, insufficient insulation or over current.

• Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation.

• There is not extra refrigerant in the outdoor unit for air purging.

• Use a vacuum pump for R32 or R410A exclusively.

• Using the same vacuum pump for different refrigerants may damage the vacuum pump or the unit.

• Use a clean gauge manifold and charging hose for R32 or R410A exclusively.

• Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.

• The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater.

• Do not pierce or burn.

• Be aware that refrigerants may not contain an odour.

• During the pump-down operation, make sure that the compressor is turned off before you remove the refrigerant piping. Do not remove the connection pipe while the compressor is in operation with 3-way valve open. This may cause abnormal pressure in the refrigeration cycle that leads to rupture and even injury.

• This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.

CAUTION

• For the air conditioner to work appropriately, install it as written in this manual.

• This product must be installed by qualified personnel with a capacity certification of handling refrigerant fluids. Refer to regulation and laws in use on installation place.

• Install the product by following local codes and regulations in force at the place of installation, and the instructions provided by the manufacturer.

• This product is part of a set constituting an air conditioner. The product must not be installed alone or be installed with non-authorized device by the manufacturer.

• Always use a separate power supply line protected by a circuit breaker operating on all wires with a distance between contact of 3 mm for this product.

• To protect the persons, earth (ground) the product correctly, and use the power cable combined with an Earth Leakage Circuit Breaker (ELCB).

• This product is not explosion proof, and therefore should not be installed in explosive atmosphere.

• This product contains no user-serviceable parts. Always consult experienced service technicians for repairing.

• When installing pipes shorter than 3 m, sound of the outdoor unit may be transferred to the indoor unit, which may cause large operating or abnormal sound.

• When moving or relocating the air conditioner, consult experienced service technicians for disconnection and reinstallation of the product.

• Do not touch the fins of the heat exchanger. Touching the heat exchanger fins could result in damage to the fins or personal injury such as skin rupture.

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1.1. Precautions for using R32 refrigerant

The basic installation work procedures are the same as conventional refrigerant (R410A,

R22) models.

However, pay careful attention to the following points:

WARNING

• Since the working pressure is 1.6 times higher than that of refrigerant R22 models, some of the piping and installation and service tools are special. (Refer to “2.1. Installation tools”.) Especially, when replacing a refrigerant R22 model with a new refrigerant R32 model, always replace the conventional piping and flare nuts with the R32 and R410A piping and flare nuts on the outdoor unit side. For R32 and R410A, the same flare nut on the outdoor unit side and pipe can be used.

• Models that use refrigerant R32 and R410A have a different charging port thread diameter to prevent erroneous charging with refrigerant R22 and for safety. Therefore, check beforehand. [The charging port thread diameter for R32 and R410A is 1/2-20

UNF.]

• Be more careful than R22 so that foreign matter (oil, water, etc.) does not enter the piping. Also, when storing the piping, securely seal the opening by pinching, taping, etc. (Handling of R32 is similar to R410A.)

CAUTION

1. Installation (Space)

• That the installation of pipe-work shall be kept to a minimum.

• That pipe-work shall be protected from physical damage.

• That compliance with national gas regulations shall be observed.

• That mechanical connections shall be accessible for maintenance purposes.

• In cases that require mechanical ventilation, ventilation openings shall be kept clear of obstruction.

• When disposing of the product is used, be based on national regulations, properly processed.

2. Servicing

2-1. Service personnel

• Any person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certificate from an industry-accredited assessment authority, which authorizes their competence to handle refrigerants safely in accordance with an industry recognised assessment specification.

• Servicing shall only be performed as recommended by the equipment manufacturer.

Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants.

• Servicing shall be performed only as recommended by the manufacturer.

2-2. Work

• Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimised. For repair to the refrigerating system, the precautions in 2-2 to 2-8 shall be complied with prior to conducting work on the system.

• Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapour being present while the work is being performed.

• All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out.

• Work in confined spaces shall be avoided.

• The area around the workspace shall be sectioned off.

• Ensure that the conditions within the area have been made safe by control of flammable material.

2-3. Checking for presence of refrigerant

• The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially flammable atmospheres.

• Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants, i.e. non sparking, adequately sealed or intrinsically safe.

2-4. Presence of fire extinguisher

• If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing equipment shall be available at hand.

• Have a dry powder or CO

2

fire extinguisher adjacent to the charging area.

2-5. No ignition sources

• No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion.

• All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during which flammable refrigerant can possibly be released to the surrounding space.

• Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. “No Smoking” signs shall be displayed.

2-6. Ventilated area

• Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work.

• A degree of ventilation shall continue during the period that the work is carried out.

• The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.

2-7. Checks to the refrigeration equipment

• Where electrical components are being changed, they shall be fit for the purpose and to the correct specification.

• At all times the manufacturer’s maintenance and service guidelines shall be followed.

• If in doubt consult the manufacturer’s technical department for assistance.

• The following checks shall be applied to installations using flammable refrigerants.

- The charge size is in accordance with the room size within which the refrigerant containing parts are installed.

- The ventilation machinery and outlets are operating adequately and are not obstructed.

- If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of refrigerant.

- Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected.

- Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any substance which may corrode refrigerant containing components, unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being so corroded.

2-8. Checks to electrical devices

• Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures.

• If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with.

• If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used.

• This shall be reported to the owner of the equipment so all parties are advised.

• Initial safety checks shall include.

- That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking.

- That there no live electrical components and wiring are exposed while charging, recovering or purging the system.

- That there is continuity of earth bonding.

3. Repairs to sealed components

• During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc.

• If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation.

• Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such a way that the level of protection is affected.

• This shall include damage to cables, excessive number of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc.

• Ensure that apparatus is mounted securely.

• Ensure that seals or sealing materials have not degraded such that they no longer serve the purpose of preventing the ingress of flammable atmospheres.

• Replacement parts shall be in accordance with the manufacturer’s specifications.

NOTES: The use of silicon sealant may inhibit the effectiveness of some types of leak detection equipment.

Intrinsically safe components do not have to be isolated prior to working on them.

4. Repair to intrinsically safe components

• Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use.

• Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere.

• The test apparatus shall be at the correct rating.

• Replace components only with parts specified by the manufacturer.

• Other parts may result in the ignition of refrigerant in the atmosphere from a leak.

5. Cabling

• Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects.

• The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans.

6. Detection of flammable refrigerants

• Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks.

• A halide torch (or any other detector using a naked flame) shall not be used.

7. Leak detection methods

• Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.)

• Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used.

• Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant employed and the appropriate percentage of gas (25 % maximum) is confirmed.

• Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work.

• If a leak is suspected, all naked flames shall be removed/extinguished.

• If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part of the system remote from the leak.

Oxygen free nitrogen (OFN) shall then be purged through the system both before and during the brazing process.

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CAUTION

8. Removal and evacuation

• When breaking into the refrigerant circuit to make repairs – or for any other purpose –conventional procedures shall be used.

However, it is important that best practice is followed since flammability is a consideration.

The following procedure shall be adhered to:

• remove refrigerant

• purge the circuit with inert gas

• evacuate

• purge again with inert gas

• open the circuit by cutting or brazing

• The refrigerant charge shall be recovered into the correct recovery cylinders.

• The system shall be “flushed” with OFN to render the unit safe.

• This process may need to be repeated several times.

• Compressed air or oxygen shall not be used for this task.

• Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until the working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum.

• This process shall be repeated until no refrigerant is within the system.

• When the final OFN charge is used, the system shall be vented down to atmospheric pressure to enable work to take place.

• This operation is absolutely vital if brazing operations on the pipe work are to take place.

• Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is ventilation available.

9. Charging procedures

• In addition to conventional charging procedures, the following requirements shall be followed.

- Ensure that contamination of different refrigerants does not occur when using charging equipment.

- Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them.

- Cylinders shall be kept upright.

- Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.

- Label the system when charging is complete (if not already).

- Extreme care shall be taken not to overfill the refrigeration system.

• Prior to recharging the system it shall be pressure tested with OFN.

• The system shall be leak tested on completion of charging but prior to commissioning.

• A follow up leak test shall be carried out prior to leaving the site.

10. Decommissioning

• Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its details.

• It is recommended good practice that all refrigerants are recovered safely.

• Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of reclaimed refrigerant.

• It is essential that electrical power is available before the task is commenced.

a) Become familiar with the equipment and its operation.

b) Isolate system electrically.

c) Before attempting the procedure ensure that:

• mechanical handling equipment is available, if required, for handling refrigerant cylinders;

• all personal protective equipment is available and being used correctly;

• the recovery process is supervised at all times by a competent person;

• recovery equipment and cylinders conform to the appropriate standards.

d) Pump down refrigerant system, if possible.

e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.

f) Make sure that cylinder is situated on the scales before recovery takes place.

g) Start the recovery machine and operate in accordance with manufacturer’s instructions.

h) Do not overfill cylinders. (No more than 80 % volume liquid charge).

i) Do not exceed the maximum working pressure of the cylinder, even temporarily.

j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off.

k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.

11. Labelling

• Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant.

• The label shall be dated and signed.

• Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.

12. Recovery

• When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely.

• When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed.

• Ensure that the correct number of cylinders for holding the total system charge are available.

• All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e. special cylinders for the recovery of refrigerant).

• Cylinders shall be complete with pressure relief valve and associated shut-off valves in good working order.

• Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.

• The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of flammable refrigerants.

• In addition, a set of calibrated weighing scales shall be available and in good working order.

• Hoses shall be complete with leak-free disconnect couplings and in good condition.

• Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release.

Consult manufacturer if in doubt.

• The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant Waste Transfer Note arranged.

• Do not mix refrigerants in recovery units and especially not in cylinders.

• If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant.

• The evacuation process shall be carried out prior to returning the compressor to the suppliers.

• Only electric heating to the compressor body shall be employed to accelerate this process.

• When oil is drained from a system, it shall be carried out safely.

Explanation of symbols displayed on the indoor unit or outdoor unit.

WARNING

CAUTION

CAUTION

CAUTION

This symbol shows that this equipment uses a flammable refrigerant. If the refrigerant is leaked, together with an external ignition source, there is a possibility of ignition.

This symbol shows that the Operation Manual should be read carefully.

This symbol shows that a service personnel should be handling this equipment with reference to the Installation

Manual.

This symbol shows that there is information included in the

Operation Manual and/or Installation Manual.

2. PRODUCT SPECIFICATION

2.1. Installation tools

WARNING

• To install a unit that uses R32 refrigerant, use dedicated tools and piping materials that have been manufactured specifically for R32(R410A) use. Because the pressure of R32 refrigerant is approximately 1.6 times higher than R22, failure to use dedicated piping material or improper installation can cause rupture or injury.

Furthermore, it can cause serious accidents such as water leakage, electric shock, or fire.

• Do not use a vacuum pump or refrigerant recovery tools with a series motor, since it may ignite.

Tool name

Gauge manifold

Charge hose

Vacuum pump

Gas leakage detector

Contents of change

Pressure is high and cannot be measured with a conventional

(R22) gauge. To prevent erroneous mixing of other refrigerants, the diameter of each port has been changed.

It is recommended the gauge with seals -0.1 to 5.3 MPa (-1 to 53 bar) for high pressure. -0.1 to 3.8 MPa (-1 to 38 bar) for low pressure.

To increase pressure resistance, the hose material and base size were changed. (R32/R410A)

A conventional vacuum pump can be used by installing a vacuum pump adapter.

(Use of a vacuum pump with a series motor is prohibited.)

Special gas leakage detector for HFC refrigerant R32/R410A.

■

Copper pipes

It is necessary to use seamless copper pipes and it is desirable that the amount of residual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed or discolored portion (especially on the interior surface). Otherwise, the expansion valve or capillary tube may become blocked with contaminants.

As an air conditioner using R32(R410A) incurs pressure higher than when using conventional refrigerant, it is necessary to choose adequate materials.

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2.2. Accessories

WARNING

For installation purposes, be sure to use the parts supplied by the manufacturer or other prescribed parts. The use of non-prescribed parts can cause serious accidents such as the unit falling, water leakage, electric shock, or fire.

• The following installation parts are supplied. Use them as required.

• Keep the Installation Manual in a safe place and do not discard any other accessories until the installation work has been completed.

Name and shape

Installation Manual

Q’ty

This manual

Description

1

■

Refrigerant pipe size and allowable piping length

CAUTION

• Keep the piping length between the indoor unit and outdoor unit within the allowable tolerance.

• The maximum lengths of this product are shown in the table. If the units are further apart than this, correct operation cannot be guaranteed.

Pipe diameter <Liquid/Gas> [mm (in.)]

Max. piping length (L) [m]

Max. height difference (H)

<Indoor unit to outdoor unit> [m]

View (Example)

6.35 (1/4) / 9.52 (3/8)

20

15

L

H

Drain pipe

Cable-tie

1

1

For outdoor unit drain piping work (May not be supplied, depending on the model.)

For fixing the demand control signal transmission cable.

Connection pipe assembly

Connection cable

Wall pipe

Decorative tape

Vinyl tape

Additional materials

Wall cap

Saddle

Drain hose

Tapping screws

Sealant

2.3. Pipe requirements

■

Selecting the pipe material

CAUTION

• Do not use existing pipes.

• Use pipes that have clean external and internal sides without any contamination which may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or water.

• It is necessary to use seamless copper pipes.

Material: Phosphor deoxidized seamless copper pipes.

It is desirable that the amount of residual oil is less than 40 mg/10 m.

• Do not use copper pipes that have a collapsed, deformed, or discolored portion (especially on the interior surface). Otherwise, the expansion valve or capillary tube may become blocked with contaminants.

• Improper pipe selection will degrade performance. As an air conditioner using

R32(R410A) incurs pressure higher than when using conventional refrigerant, it is necessary to choose adequate materials.

• Thicknesses of copper pipes used with R32(R410A) are as shown in the table.

• Never use copper pipes thinner than those indicated in the table even if they are available on the market.

Thicknesses of Annealed Copper Pipes

Pipe outside diameter [mm (in.)]

6.35 (1/4)

9.52 (3/8)

Thickness [mm]

0.80

0.80

12.70 (1/2)

15.88 (5/8)

19.05 (3/4)

0.80

1.00

1.20

■

Protection of pipes

• Protect the pipes to prevent the entry of moisture and dust.

• Especially, pay attention when passing the pipes through a hole or connecting the end of a pipe to the outdoor unit.

Location

Outdoor

Indoor

Working period

1 month or more

Less than 1 month

-

Protection method

Pinch pipes

Pinch or tape pipes

Pinch or tape pipes

2.4. Electrical requirements

CAUTION

• Be sure to install a breaker of the specified capacity.

• Regulation of cables and breaker differs from each locality, refer in accordance with local rules.

Cable

Voltage rating

Operating range

Power Supply Cable

Conductor size [mm²] *1

1.5

1 Φ 240 V (50 Hz)

198 to 264 V

Type Remarks

Connection Cable 1.5

Demand control signal transmission cable

0.5-1.5

AS/NZS 5000.2

Double insulated

(Max. length :

30m)

*1 Selected sample: Select the correct cable type and size according to the country or region’s regulations.

* Limit the voltage drop less than 2 %. Increase the cable diameter if voltage drop is 2 % or more.

Model

Breaker capacity

[A]

Earth leakage breaker

[mA]

9, 12 10 30

• Select the appropriate breaker of the described specification according to the national or regional standards.

• Select the breaker that enough load current can pass through it.

• Before starting work check that power is not being supplied to all poles of the indoor unit and outdoor unit.

• Install all electrical works in accordance to standard.

• Install the disconnect device with a contact gap of at least 3 mm in all poles nearby the units. (Both indoor unit and outdoor unit)

• Install the circuit breaker nearby the units.

2.5. Additional charge amount

CAUTION

• When adding refrigerant, add the refrigerant from the charging port at the completion of work.

• The maximum length of the piping is 20 m. If the units are further apart than this, correct operation can not be guaranteed.

Refrigerant suitable for a piping length of 15 m is charged in the outdoor unit at the factory.

When the piping is longer than 15 m, additional charging is necessary.

For the additional amount, refer to the following table.

Pipe length

Additional refrigerant

15 m

None

20 m

+100 g

Rate

20 g/m

Between 15 m and the maximum length, when using a connection pipe other than that in the table, charge additional refrigerant with 20 g/m as the criteria.

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2.6. Operating range

Cooling mode

Dry mode

Heating mode

[Reverse cycle model only]

Outdoor temperature

-10 to 46 ˚C -15 to 24 ˚C

• If this unit is operated outside the operating temperature, the protection circuits may be activated to stop the unit.

3. INSTALLATION WORK

Make sure to obtain the customer’s approval for selecting and installing the outdoor unit.

WARNING

• Securely install the outdoor unit at a location that can withstand the weight of the unit.

Otherwise, the outdoor unit may fall and cause injury.

• Be sure to install the outdoor unit as prescribed, so that it can withstand earthquakes and typhoons or other strong winds. Improper installation can cause the unit to topple or fall, or other accidents.

• Do not install the outdoor unit near the edge of a balcony. Otherwise, children may climb onto the outdoor unit and fall off of the balcony.

CAUTION

• Do not install the outdoor unit in the following areas:

- Area with high salt content, such as at the seaside. It will deteriorate metal parts, causing the parts to fail or the unit to leak water.

- Area filled with mineral oil or containing a large amount of splashed oil or steam, such as a kitchen. It will deteriorate plastic parts, causing the parts to fail or the unit to leak water.

- Area that generates substances that adversely affect the equipment, such as sulfuric gas, chlorine gas, acid, or alkali. It will cause the copper pipes and brazed joints to corrode, which can cause refrigerant leakage.

- Area containing equipment that generates electromagnetic interference. It will cause the control system to malfunction, preventing the unit from operating normally.

- Area that can cause combustible gas to leak, contains suspended carbon fibers or flammable dust, or volatile inflammables such as paint thinner or gasoline. If gas leaks and settles around the unit, it can cause a fire.

- Area that has heat sources, vapors, or the risk of the leakage of flammable gas in the vicinity.

- Area where small animals may live. It may cause failure, smoke or fire if small animals enter and touch internal electrical parts.

- Area where animals may urinate on the unit or ammonia may be generated.

• Do not tilt the outdoor unit more than 3 degrees. However, do not install the unit with it tilted towards the side containing the compressor.

• Install the outdoor unit in a well-ventilated location away from rain or direct sunlight.

• If the outdoor unit must be installed in an area within easy reach of the general public, install as necessary a protective fence or the like to prevent their access.

• Install the outdoor unit in a location that would not inconvenience your neighbors, as they could be affected by the airflow coming out from the outlet, noise, or vibration. If it must be installed in proximity to your neighbors, be sure to obtain their approval.

• If the outdoor unit is installed in a cold region that is affected by snow accumulation, snow fall, or freezing, take appropriate measures to protect it from those elements. To ensure a stable operation, install inlet and outlet ducts.

• Install the outdoor unit in a location that is away from exhaust or the vent ports that discharge vapor, soot, dust, or debris.

• Install the indoor unit, outdoor unit, power supply cable, connection cable, and remote controller cable at least 1 m away from a television or radio receivers. The purpose of this is to prevent TV reception interference or radio noise. (Even if they are installed more than 1 m apart, you could still receive noise under some signal conditions.)

• If children under 10 years old may approach the unit, take preventive measures so that they cannot reach the unit.

• Keep the length of the piping of the indoor and outdoor units within the allowable range.

• For maintenance purposes, do not bury the piping.

• In places where the outdoor temperature drops to 0 ˚C or lower, the drain water may freeze and may stop up the drain or cause other outdoor unit trouble. Therefore take measures so that the drain water will not freeze and clog the drain.

• Set up the outdoor unit in a high place, and do not arrange the frame of installed stand under the drain port. Because the water dropped from the drain port repeats freezing and accumulating, and may block the drain port.

Decide the mounting position with the customer as follows:

(1) Install the outdoor unit in a location which can withstand the weight of the unit and vibration, and which can install horizontally.

(2) Provide the indicated space to ensure good airflow.

(3) If possible, do not install the unit where it will be exposed to direct sunlight.

(If necessary, install a blind that does not interfere with the airflow.)

(4) Do not install the unit near a source of heat, steam, or flammable gas.

(5) During heating operation, drain water flows from the outdoor unit.

Therefore, install the outdoor unit in a place where the drain water flow will not be obstructed.

(6) Do not install the unit where strong wind blows or where it is very dusty.

(7) Do not install the unit where people pass.

(8) Install the outdoor unit in a place where it will be free from being dirty or getting wet by rain as much as possible.

(9) Install the unit where connection to the indoor unit is easy.

3.1. Installation dimensions

CAUTION

Keep the space shown in the installation examples.

If the installation is not performed accordingly, it could cause a short circuit and result in a lack of operating performance.

■

Outdoor unit installation

When the upper space is open

(Unit : mm)

(1) Obstacles at rear only (2) Obstacles at rear and sides

(3) Obstacles at front

100 or more

100 or more

250 or more

(4) Obstacles at front and rear

100 or more

600 or more

When an obstruction in the upper space

(Unit : mm)

(1) Obstacles at rear and above (2) Obstacles at rear, sides, and above

Max. 200

100 or more

600 or more

Max. 200

600 or more

600 or more

100 or more

100 or more

250 or more

100 or more

■

Multiple outdoor unit installation

• Provide at least 250 mm of space between the outdoor units if multiple units are installed.

• When routing the piping from the side of an outdoor unit, provide space for the piping.

When the upper space is open

(Unit : mm)

(1) Obstacles at rear only (2) Obstacles at front only

250

or more

250 or more

(3) Obstacles at front and rear

200 or more

250

or more

200 or more

1,000 or more

1,000 or more

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When an obstruction in the upper space

(Unit : mm)

(1) Obstacles at rear and above

• Up to 3 units can be installed side by side.

• When 4 units or more are arranged in a line, provide the space as shown below.

Max. 300

1,500 or more

250 or more

1,500 or more

250 or more

200 or more

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Outdoor units installation multi-row

(Unit : mm)

(1) Single parallel unit arrangement

(2) Multiple parallel unit arrangement

100 or more

1,000 or more

200 or more

500 or more

250

or more

250

or more

200 or more

2,000 or more

400 or more

1,000 or more

200 or more

250 or more

1,000 or more

200 or more

CAUTION

Do not install the outdoor unit in two-stage where the drain water could freeze.

Otherwise the drainage from the upper unit may form ice and cause a malfunction of the lower unit.

NOTES:

• If the space is larger than stated above, the condition will be the same as when there is no obstacle.

• When installing the outdoor unit, be sure to open the front and left side to obtain better operation efficiency.

3.2. Mounting the unit

• Install 4 anchor bolts at the locations indicated with arrows in the figure.

• To reduce vibration, do not install the unit directly on the ground. Install it on a secure base (such as concrete blocks).

• The foundation shall support the legs of the unit and have a width of 50 mm or more.

• Depending on the installation conditions, the outdoor unit may spread its vibration during operation, which may cause noise and vibration. Therefore, attach damping materials (such as damping pads) to the outdoor unit during installation.

• Install the foundation, making sure that there is enough space for installing the connection pipes.

• Secure the unit to a solid block using foundation bolts. (Use 4 sets of commercially available M10 bolts, nuts, and washers.)

• The bolts should protrude 20 mm. (Refer to the figure.)

• If overturning prevention is required, purchase the necessary commercially available items.

(Unit : mm)

580

20

Bolt

Nut

Washer

• Do not install directly on the ground, this may result in equipment failure.

• The drain water is discharged from the bottom of the equipment. Construct a drain ditch around the base and discharge the drain water properly.

• Provide ample space for ice buildup from condensate between the bottom of the unit and the flat surface on which it is mounted. Otherwise, there is risk that the drainage water will freeze between the device and the surface, disabling drainage.

50 mm or more

CAUTION

If the unit is installed in a region that is exposed to high winds, freezing conditions, freezing rain, snow fall or heavy snow accumulation, take appropriate measures to protect it from those elements.

To ensure stable operation, the outdoor unit must be installed on a raised stand or rack, at or above the anticipated snow depth for the region.

The installation of snow hoods and drift prevention fencing is recommended when blowing and drifting snow is common to the region.

3.3. Removing and replacing part

■

Switch cover removal

(1) Remove the tapping screws.

(3 places)

(2) Slide the switch cover downwards to release.

■

Installing the switch cover

(1) After inserting the hooks (2 places) on the switch cover into the hole on the outdoor unit, slide the switch cover upwards.

(2) Replace the tapping screws.

(3 places).

Holes

Hook

Hook

Screws

WARNING

• Install the unit where it will not be tilted by more than 3°.

• When installing the outdoor unit where it may exposed to strong wind, fasten it securely.

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3.4. Drain installation

CAUTION

• Perform drain work in accordance with this Manual, and ensure that the drain water is properly drained. If the drain work is not carried out correctly, water may drip down from the unit, wetting the furniture.

• When the outdoor temperature is 0 °C or less, do not use the accessory drain pipe.

If the drain pipe is used, the drain water in the pipe may freeze in extremely cold weather.

Drain pipe mounting hole

Base of the outdoor unit

• If you are installing the drain pipe, please provide a working space under the base of the outdoor unit.

• As the drain water flows out of the outdoor unit during heating operation, install the drain pipe and connect it to a commercial

16 mm hose.

• When installing the drain pipe, plug all the holes other than the drain pipe mounting hole in the bottom of the outdoor unit with putty so there is no water leakage.

Drain pipe

(Unit : mm)

AIR

■

Bending pipes

(1) When bending the pipe, be careful not to crush it.

(2) To prevent breaking of the pipe, avoid sharp bends.

Bend the pipe with a radius of curvature of 70 mm or more.

(3) If the copper pipe is bend the pipe or pulled to often, it will become stiff. Do not bend the pipes more than three times at one place.

■

Flare connection

(1) Detach the caps and plugs from the pipes.

CAUTION

• Be sure to apply the pipe against the port on the indoor unit and the outdoor unit correctly. If the centering is improper, the flare nut cannot be tightened smoothly. If the flare nut is forced to turn, the threads will be damaged.

• Do not remove the flare nut from the indoor unit pipe until immediately before connecting the connection pipe.

(2) Centering the pipe against port on the outdoor unit, turn the flare nut with your hand.

To prevent gas leakage, coat the flare surface with alkylbenzene oil (HAB).

Do not use mineral oil.

(3) Tighten the flare nut of the connection pipe at the outdoor unit valve connector.

399

Drain pipe mounting hole

3.5. Pipe installation

CAUTION

• Do not use mineral oil on a flared part. Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.

• While welding the pipes, be sure to blow dry nitrogen gas through them.

■

Flaring

(1) Cut the connection pipe to the necessary length with a pipe cutter.

(2) Hold the pipe downward so that cuttings will not enter the pipe and remove the burrs.

(3) Insert the flare nut onto the pipe and flare the pipe with a flaring tool.

Insert the flare nut (always use the flare nut attached to the indoor and outdoor units respectively) onto the pipe and perform the flare processing with a flare tool.

Use the special R32(R410A) flare tool, or the conventional (for R22) flare tool.

When using the conventional flare tool, always use an allowance adjustment gauge and secure the A dimension shown in the following table.

Check if [L] is flared uniformly and is not cracked or scratched.

Pipe outside diameter

ø 6.35 mm (1/4")

ø 9.52 mm (3/8")

ø 12.70 mm (1/2”)

ø 15.88 mm (5/8")

ø 19.05 mm (3/4”)

Die

A

Flaring tool for

R32 or R410A, clutch type

Pipe

A (mm)

Conventional (R22) Flaring tool

Clutch type Wing nut type

0 to 0.5

1.0 to 1.5

1.5 to 2.0

2-way valve

(Liquid)

3-way valve

(Gas)

Connection pipe

(Liquid)

Connection pipe

(Gas)

Flare nuts

(4) When the flare nut is tightened properly by your hand, use a torque wrench to finally tighten it.

Torque wrench

Holding wrench

Flare nut

Connection pipe

(liquid) 90°

Flare nut

Connection pipe

CAUTION

Hold the torque wrench at its grip, keeping it in the right angle with the pipe, in order to tighten the flare nut correctly.

Flare nut [mm (in.)]

6.35 (1/4) dia.

9.52 (3/8) dia.

12.70 (1/2) dia.

15.88 (5/8) dia.

19.05 (3/4) dia.

Tightening torque [N·m (kgf·cm)]

16 to 18 (160 to 180)

32 to 42 (320 to 420)

49 to 61 (490 to 610)

63 to 75 (630 to 750)

90 to 110 (900 to 1100)

CAUTION

• Fasten a flare nut with a torque wrench as instructed in this manual. If fastened too tight, the flare nut may be broken after a long period of time and cause a leakage of refrigerant.

• During installation, make sure that the refrigerant pipe is attached firmly before you run the compressor. Do not operate the compressor under the condition of refrigerant piping not attached properly with 3-way valves open. This may cause abnormal pressure in the refrigeration cycle that leads to breakage and even injury.

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3.6. Sealing test

WARNING

• Before operating the compressor, install the pipes and securely connect them.

Otherwise, if the pipes are not installed and if the valves are open when the compressor operates, air could enter the refrigeration cycle. If this happens, the pressure in the refrigeration cycle will become abnormally high and cause damage or injury.

• After the installation, make sure there is no refrigerant leakage. If the refrigerant leaks into the room and becomes exposed to a source of fire such as a fan heater, stove, or burner, it produces a toxic gas.

• Do not subject the pipes to strong shocks during the sealing test. It can rupture the pipes and cause serious injury.

CAUTION

• Do not block the walls and the ceiling until the sealing test and the charging of the refrigerant gas have been completed.

• For maintenance purposes, do not bury the piping of the outdoor unit.

• After connecting the pipes, perform a sealing test.

• Make sure that the 3-way valves are closed before performing a sealing test.

• Pressurize nitrogen gas to 4.15 MPa to perform the sealing test.

• Add nitrogen gas to both the liquid pipes and the gas pipes.

• Check all flare connections and welds. Then, check that the pressure has not decreased.

• Compare the pressures after pressurizing and letting it stand for 24 hours, and check that the pressure has not decreased.

* When the outdoor air temperature changes 5 °C, the test pressure changes

0.05 MPa. If the pressure has dropped, the pipe joints may be leaking.

• If a leak is found, immediately repair it and perform the sealing test again.

• After completing the sealing test, release the nitrogen gas from both valves.

• Release the nitrogen gas slowly.

3.7. Vacuum process

CAUTION

• Perform a refrigerant leakage test (air tightness test) to check for leaks using nitrogen gas while all valves in the outdoor unit are closed. (Use the test pressure indicated on the nameplate.)

• Be sure to evacuate the refrigerant system using a vacuum pump.

• The refrigerant pressure may sometimes not rise when a closed valve is opened after the system is evacuated using a vacuum pump. This is caused by the closure of the refrigerant system of the outdoor unit by the electronic expansion valve. This will not affect the operation of the unit.

• If the system is not evacuated sufficiently, its performance will drop.

• Use a clean gauge manifold and charging hose that were designed specifically for use with R32(R410A). Using the same vacuum equipment for different refrigerants may damage the vacuum pump or the unit.

• Do not purge the air with refrigerants, but use a vacuum pump to evacuate the system.

Refrigerant for purging the air is not charged in the outdoor unit at the factory.

(1) Remove the cap, and connect the gauge manifold and the vacuum pump to the charging valve by the service hoses.

(2) Vacuum the indoor unit and the connecting pipes until the pressure gauge indicates

–0.1 MPa (–76 cmHg).

(3) When –0.1 MPa (–76 cmHg) is reached, operate the vacuum pump for at least

15 minutes.

(4) Disconnect the service hoses and fit the cap to the charging valve to the specified torque.

(5) Remove the blank caps, and fully open the spindles of the 3-way valves with a hexagon wrench [Torque: 6~7 N·m (60 to 70 kgf·cm)].

(6) Tighten the blank caps of the 3-way valves to the specified torque.

Blank cap

6.35 mm (1/4 in.)

9.52 mm (3/8 in.)

12.70 mm (1/2 in.)

15.88 mm (5/8 in.)

19.05 mm (3/8 in.)

Charging port cap

Tightening torque

20 to 25 N·m (200 to 250 kgf·cm)

20 to 25 N·m (200 to 250 kgf·cm)

28 to 32 N·m (280 to 320 kgf·cm)

30 to 35 N·m (300 to 350 kgf·cm)

35 to 40 N·m (350 to 400 kgf·cm)

12.5 to 16 N·m (125 to 160 kgf·cm)

Use a 4 mm hexagon wrench

Flare nuts

Service valve

(Liquid)

Service valve

(Gas)

Charging port

Blank caps

Charging port cap

/R +L

Gauge manifold

Vacuum pump

3.8. Additional charging

WARNING

When moving and installing the air conditioner, do not mix gas other than the specified refrigerant R32 inside the refrigerant cycle.

If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an abnormally high value and cause breakage, injury, etc.

CAUTION

• After vacuuming the system, add refrigerant.

• Do not reuse recovered refrigerant.

• When charging the refrigerant R32, always use an electronic scales for refrigerant charging (to measure the refrigerant by weight). Adding more refrigerant than the specified amount will cause a malfunction.

• When charging the refrigerant, take into account the slight change in the composition of the gas and liquid phases, and always charge from the liquid phase side whose composition is stable.

• Check if the steel cylinder has a siphon installed or not before filling. (There is an indication “with siphon for filling liquid” on the steel cylinder.)

Filling method for cylinder with siphon

Liquid

R32

Gas Set the cylinder vertical and fill with the liquid.

(Liquid can be filled without turning bottom up with the siphon inside.)

Filling method for other cylinders

R32

Gas Turn bottom up and fill with liquid.

(Be careful to avoid turning over the cylinder.)

Liquid

• Be sure to use the special tools for R32(R410A) for pressure resistance and to avoid mixing of impure substances.

• If the units are further apart than the maximum pipe length, correct operation can not be guaranteed.

• Make sure to back closing valve after refrigerant charging. Otherwise, the compressor may fail.

• Minimize refrigerant release to the air. Excessive release is prohibited under the

Freon Collection and Destruction Law.

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3.9. Electrical wiring

WARNING

• Wiring connections must be performed by a qualified person in accordance with the specifications. The voltage rating for this product is 240 V at 50 Hz. It should be operated within the range of 198 to 264 V.

• Before connecting the wires, make sure the power supply is off.

• Never touch electrical components immediately after the power supply has been turned off. Electrical shock may occur. After turning off the power, always wait

10 minutes or more before touching electrical components.

• Use a dedicated power supply circuit. Insufficient power capacity in the electrical circuit or improper wiring may cause electric shock or fire.

• Be sure to install an earth leakage breaker.

Otherwise, it will cause electric shock or fire.

• A circuit breaker is installed in the permanent wiring. Always use a circuit that can trip all the poles of the wiring and has an isolation distance of at least 3 mm between the contacts of each pole.

• Use designated cables and power cables. Improper use may cause electric shock or fire by poor connection, insufficient insulation, or over current.

• Do not modify power cable, use extension cable or branch wiring. Improper use may cause electric shock or fire by poor connection, insufficient insulation or over current.

• Connect the connector cable securely to the terminal. Check no mechanical force bears on the cables connected to the terminals. Faulty installation can cause a fire.

• Use ring terminals and tighten the terminal screws to the specified torques, otherwise, abnormal overheating may be produced and possibly cause serious damage inside the unit.

• Make sure to secure the insulation portion of the connector cable with the cable clamp. Damaged insulation can cause a short circuit.

• Fix cables so that cables do not make contact with the pipes (especially on high pressure side). Do not make power supply cable and transmission cable come in contact with valves (Gas).

• Never install a power factor improvement condenser. Instead of improving the power factor, the condenser may overheat.

• Be sure to perform the grounding work.

Do not connect grounding wires to a gas pipe, water pipe, lightning rod or grounding wire for a telephone.

- Connection to a gas pipe may cause a fire or explosion if gas leaks.

- Connection to a water pipe is not an effective grounding method if PVC pipe is used.

- Connection to the grounding wire of a telephone or to a lightning rod may cause a dangerously abnormal rise in the electrical potential if lightning strikes.

- Improper grounding work can cause electric shocks.

• Securely install the electrical box cover on the unit. An improperly installed service panel can cause serious accidents such as electric shock or fire through exposure to dust or water.

• Do not connect the AC power supply to the transmission line terminal board.

Improper wiring can damage the entire system.

CAUTION

• The primary power supply capacity is for the air conditioner itself, and does not include the concurrent use of other devices.

• If the electrical power is inadequate, contact your electric power company.

• Install a breaker in a location that is not exposed to high temperatures.

If the temperature surrounding the breaker is too high, the amperage at which the breaker cuts out may decrease.

• When using an earth leakage breaker that has been designed solely for ground fault protection, be sure to install a fuse-equipped switch or circuit breaker.

• This system uses an inverter, which means that it must be used an earth leakage breaker that can handle harmonics in order to prevent malfunctioning of the earth leakage breaker itself.

• Do not use crossover power supply wiring for the outdoor unit.

• If the temperature surrounding the breaker is too high, the amperage at which the breaker cuts out may decrease.

• When the electrical switchboard is installed outdoors, place it under lock and key so that it is not easily accessible.

• Start wiring work after closing branch switch and over current breaker.

• Transmission cable between indoor unit and outdoor unit is 240 V.

• Be sure not to remove thermistor sensor etc. from power wiring and connection wiring. Compressor may fail if operated while removed.

• Always keep to the maximum length of the connection cable. Exceeding the maximum length may lead to erroneous operation.

• Do not start operation until the refrigerant is charged completely. The compressor will fail if it is operated before the refrigerant piping charging is complete.

• The static electricity that is charged to the human body can damage the control PC

Board when handling the control PC Board for address setting, etc.

Please keep caution to the following points.

Provide the grounding of Indoor unit, Outdoor unit and Option equipment.

Cut off the power supply (breaker).

Touch the metal section (such as the unpainted control box section) of the indoor or outdoor unit for more than 10 seconds. Discharge the static electricity in your body.

Never touch the component terminal or pattern on the PC Board.

Cable clamp

Cable tie (Accessory)

CAUTION

• Be careful not to generate a spark as follows for using a flammable refrigerant.

- Do not remove the fuse while power is on.

- Do not disconnect plug from the wall outlet and the wiring while the power is on.

- It is recommended to position the outlet connection in a high position. Place the cords so that they do not get tangled.

• Confirm the indoor unit model name before connecting. If the indoor unit is not R32 compatible, error signal will be displayed, and the unit will be inoperable.

■

How to connect wiring to the terminal

Caution when wiring cable

• When stripping off the coating of a lead wire, always use a special tool such as a wire stripper. If there is no special tool available, carefully strip the coating with a knife etc.

(1) Use ring terminals with insulating sleeves as shown in the figure below to connect to the terminal block.

(2) Securely clamp the ring terminals to the wires using an appropriate tool so that the wires do not come loose.

Strip : 10 mm

Ring terminal

Sleeve

(3) Use the specified wires, connect them securely, and fasten them so that there is no stress placed on the terminals.

(4) Use an appropriate screwdriver to tighten the terminal screws. Do not use a screwdriver that is too small, otherwise, the screw heads may be damaged and prevent the screws from being properly tightened.

(5) Do not tighten the terminal screws too much, otherwise, the screws may break.

Screw with special washer

Screw with special washer

Wire

Ring terminal

Ring terminal

Terminal blocks

(6) Refer to the table below for the terminal screw tightening torques.

M3.5 screw

M4 screw

M5 screw

Tightening torque [N·m (kgf·cm)]

0.8 to 1.0 (8 to 10)

1.2 to 1.8 (12 to 18)

2.0 to 3.0 (20 to 30)

■

Wiring method

(1) Remove the outdoor unit Switch cover.

(2) Remove the outdoor unit cable clamp.

(3) Ring terminals connect to the connection cable.

(4) Connect the ring terminals fully into the terminal block.

(5) Fasten the sheath with a cable clamp.

(6) Fasten the sheath with a cable tie. (Demand control )

(7) Install the Switch cover.

Wire

Demand control signal terminal block

1 : DRM 1

2 : DRM 2

3 : DRM 3

C : COMMON

Thread the cable tie through the hole and tighten securely

Cut off the excess

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■

Connection diagrams

Outdoor unit side terminal

Earth

(Ground)

Earth (Ground)

Power line

Earth

(Ground) line

Demand control signal transmission cable

Earth (Ground) line

Power supply

Indoor unit side terminal

■

Connection cable preparation

60 mm

30 mm

Earth cable

75 mm

Connection cable

Power supply cable

■

Connection cable wiring

Demand control signal transmission cable

Run the connection cable and power supply cable to the rear of the outdoor unit between the 2-valves as shown in the figure.

(For the switch cover to be easily installed.)

Demand control signal transmission cable

Connection and power supply cable

• Enquiries when testing the operation of the demand control:

Consult Fujitsu General Customer Service and your energy provider if you have any operational issues or errors are caused.

CAUTION

Route the demand control signal transmission cable away from the power supply cable.

Adjacent wiring of those cables may lead the product malfunctions caused by generated noise.

CAUTION

• Match the terminal block numbers and connection cable colors with those of the indoor unit.

Erroneous wiring may cause burning of the electric parts.

• Connect the connection cables firmly to the terminal block. Imperfect installation may cause a fire.

• Always fasten the outside covering of the connection cable with the cable clamp. (If the insulator is chafed, electric leakage may occur.)

• Securely earth the power cable.

• Do not use the earth screw for an external connector. Only use for interconnection between two units.

5. FINISHING

5.1. Installing insulation

• Determine the thickness of the insulation material by referring to Table A.

Table A, Selection of insulation

(for using an insulation material with equal heat transmission rate or below

0.040 W/(m·k))

Relative humidity

[mm (in.)]

Pipe diameter

6.35 (1/4)

9.52 (3/8)

12.70 (1/2)

15.88 (5/8)

19.05 (3/4)

70% or more

Insulation material

Minimum thickness [mm]

75% or more

80% or more

85% or more

8

9

10

10

10

10

11

12

12

13

13

14

15

16

16

17

18

19

20

21

• If the ambient temperature and relative humidity exceed 32 °C, increase the level of heat insulation for the refrigerant pipes.

6. PUMP DOWN

■

Pump down operation (forced cooling operation)

To avoid discharging refrigerant into the atmosphere at the time of relocation or disposal, recover refrigerant by doing the forced cooling operation according to the following procedure.

(1) Conduct preliminary operation for 5 to 10 minutes using the forced cooling operation.

Start the forced cooling operation. Keep on pressing the [MANUAL AUTO] of the indoor unit for more than 10 seconds. The operation indicator lamp and timer indicator lamp will begin to flash simultaneously during test run. (The forced cooling operation cannot start if the [MANUAL AUTO] is not kept on pressing for more than 10 seconds.)

(2) Close the valve stem of 2-way valve completely.

(3) Continue the forced cooling operation for 2 to 3 minutes, then close all the valve stems on the 3-way valves

(4) Stop the operation.

• Press the [START/STOP] of the remote controller to stop the operation.

• Press the [MANUAL AUTO] when stopping the operation from the indoor unit side.

(It is not necessary to press down for more than 10 seconds.)

CAUTION

Please check the refrigerant circuit for any leaks before starting the pump down operation.

Do not proceed with the pump down operation if there is no refrigerant left in the circuit due to bent or broken piping

During the pump down operation, be sure to turn off the compressor before removing the refrigerant piping.

4. TEST RUN

Make a TEST RUN in accordance with the installation manual for the indoor unit.

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