aclimatconsulting 9379127103 Air Conditioner Indoor Unit Installation Guide

9379127103 Air Conditioner Indoor Unit

Product Information

Specifications

• Product Type: Air Conditioner Indoor Unit (Duct type)
• Refrigerant: R32
• Minimum Room Area for Installation: Refer to M (kg) values in
  the table below

Product Usage Instructions

Safety Precautions

It is crucial to follow all safety precautions to ensure safe
operation and prevent accidents. Please refer to the safety
precautions section in the manual for detailed instructions.

Installation

Installation should be carried out by authorized service
personnel only. Ensure that the refrigerant charge amount is as per
the specified values based on room area.

Handling Refrigerant R32

When handling refrigerant R32, pay attention to the higher
working pressure compared to other models. Use special tools for
installation and service and replace piping and flare nuts when
switching from R22 models. Prevent foreign matter from entering the
piping and seal openings securely when storing.

Maintenance

Regular maintenance is essential for optimal performance. Check
the refrigerant charge levels periodically and ensure proper
ventilation for efficient operation.

FAQ

Q: What should I do if there is water leakage from the

unit?

A: If you notice water leakage, immediately stop the indoor unit
using the control unit or breaker and contact authorized service
personnel for inspection and repair.

Q: Can I use refrigerant R22 with this unit?

A: No, this unit is designed for use with refrigerant R32. Do
not attempt to use R22 refrigerant to prevent damage and ensure
safety.

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AIR CONDITIONER INDOOR UNIT (Duct type)
Contents
1. SAFETY PRECAUTIONS………………………………………………………… 1 2. PRODUCT SPECIFICATION……………………………………………………. 4
2.1. Installation tools……………………………………………………………….. 4 2.2. Accessories …………………………………………………………………….. 4 2.3. Pipe requirement ……………………………………………………………… 4 2.4. Electrical requirement……………………………………………………….. 5 2.5. Optional parts ………………………………………………………………….. 5 3. INSTALLATION WORK …………………………………………………………… 5 3.1. Selecting an installation location ………………………………………… 5 3.2. Installation dimension ……………………………………………………….. 5 3.3. Installing the unit………………………………………………………………. 6 3.4. Intake duct connection………………………………………………………. 6 3.5. Outlet duct connection………………………………………………………. 7 3.6. Drain installation ………………………………………………………………. 7 3.7. Pipe installation ……………………………………………………………….. 8 3.8. Electrical wiring………………………………………………………………… 9 3.9. Remote controller installation …………………………………………….11 3.10. Fresh air intake ………………………………………………………………11 4. OPTIONAL INSTALLATION WORK ………………………………………….11 4.1. Optional kit installation………………………………………………………11 4.2. External input and output…………………………………………………..11 4.3. Remote sensor (Optional parts) ……………………………………….. 12 4.4. IR receiver unit (Optional parts)………………………………………… 12 5. REMOTE CONTROL INSTALLATION……………………………………… 12 5.1. Group control…………………………………………………………………. 12 5.2. Multiple remote control ……………………………………………………. 14 5.3. Simultaneous multi system operation………………………………… 14 6. FUNCTION SETTING……………………………………………………………. 14 6.1. Function Details……………………………………………………………… 14 6.2. Static pressure characteristic …………………………………………… 16 7. CHECK LIST………………………………………………………………………… 16 8. TEST RUN…………………………………………………………………………… 16 8.1. Check items…………………………………………………………………… 16 8.2. Operation method…………………………………………………………… 16 9. FINISHING…………………………………………………………………………… 16 10. CUSTOMER GUIDANCE ………………………………………………………. 16 11. ERROR CODES…………………………………………………………………… 17

INSTALLATION MANUAL

[Original instructions]

PART No. 9379127103
For authorized service personnel only.

WARNING

· The appliance shall be installed, operated and stored in a room with a floor area larger than X m².

Amount of refrigerant charge M (kg)

Minimum room area X (m2)

M 1.22

–

1.22 < M 1.23

1.45

1.23 < M 1.50

2.15

1.50 < M 1.75

2.92

1.75 < M 2.0

3.82

2.0 < M 2.5

5.96

2.5 < M 3.0

8.59

3.0 < M 3.5

11.68

3.5 < M 4.0

15.26

(IEC 60335-2-40)
· Installation of this product must be done by experienced service technicians or professional installers only in accordance with this manual. Installation by non-professional or improper installation of the product might 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.
· 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 when you are working, ventilate the area. If the leaking refrigerant is exposed to a direct flame, it may produce 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 means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
· 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.
· To avoid danger of suffocation, keep the plastic bag or thin film used as the packaging material away from young children.
· 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. · Except for EMERGENCY, never turn off main as well as sub breaker of the indoor
units during operation. It will cause compressor failure as well as water leakage. First, stop the indoor unit by operating the control unit, converter or external input device and then cut the breaker. Make sure to operate through the control unit, converter or external input device. When the breaker is designed, locate it at a place where the users cannot start and stop in the daily work.

1. SAFETY PRECAUTIONS
· Be sure to read this manual thoroughly before installation. · The warnings and precautions indicated in this manual contain important information per-
taining to your safety. Be sure to observe them. · Hand this manual, together with the operation manual, to the customer. Request the
customer to keep them on hand for future use, such as for relocating or repairing the unit.
Indicates a potentially or imminently hazardous situation
WARNING which, if not avoided, could result in death or serious injury.
Indicates a potentially hazardous situation that may result in
CAUTION minor or moderate injury or damage to property.

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CAUTION
· Read carefully all safety information written in this manual before you install or use the air conditioner.
· 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 a device not authorized 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, ground (earth) 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 an explosive atmosphere.
· 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 5 minutes or more before you touch the electrical components.
· This product contains no user-serviceable parts. Always consult experienced service technicians for repairing.
· When moving or relocating the air conditioner, consult experienced service technicians for disconnection and reinstallation of the product.
· Do not touch the aluminum fins of heat exchanger built-in the indoor or outdoor unit to avoid personal injury when you install or maintain the unit.
· Do not place any other electrical products or household belongings under the product. Condensation dripping from the product might get them wet, and may cause damage or malfunction to the property.
· Do not attempt to install the air conditioner or a part of the air conditioner by yourself. · This unit must be installed by qualified personnel with a capacity certificate for han-
dling refrigerant fluids. Refer to regulation and laws in use on installation place.
· Be careful not to scratch the air conditioner when handling it.
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:
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. (See “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. · The appliance shall not be installed in an unventilated space, if that space is smaller
than X m².

Amount of refrigerant charge M (kg)

Minimum room area X (m2)

M 1.22

–

1.22 < M 1.23

1.45

1.23 < M 1.50

2.15

1.50 < M 1.75

2.92

1.75 < M 2.0

3.82

2.0 < M 2.5

5.96

2.5 < M 3.0

8.59

3.0 < M 3.5

11.68

3.5 < M 4.0

15.26

(IEC 60335-2-40)
· 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.

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CAUTION
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 authorises 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 minimized. 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 dur-
ing work, to ensure the technician is aware of potentially flammable atmospheres. · Ensure that the leak detection equipment being used is suitable for use with flam-
mable refrigerants, i.e. nonsparking, 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 CO2 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 fol-
lowed. · 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 con-
nected to the circuit until it is satisfactorily dealt with. · If the fault cannot be corrected immediately but it is necessary to continue opera-
tion, 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.

CAUTION
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 servic-
ing, 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.
NOTE: 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, vibra-
tion, 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.
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.

CAUTION
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 flam-
mable 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.

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

WARNING CAUTION

This symbol shows that this appliance uses a flammable refrigerant. If the refrigerant is leaked and exposed to an external ignition source, there is a risk of fire.
This symbol shows that the operation manual should be read carefully.

CAUTION CAUTION

This symbol shows that a service personnel should be handling this equipment with reference to the installation manual.
This symbol shows that information is available such as the operation manual or installation manual.

Name and Shape Operation manual
Installation manual

Q’ty

Description

1

(This book) 1

2. PRODUCT SPECIFICATION

2.1. Installation tools

Tool name

Change from R22 to R32 (R410A)

Gauge manifold

Pressure is high and cannot be measured with a R22 gauge. To prevent erroneous mixing of other refrigerants, the diameter of each port has been changed. It is recommended to use 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.

Charge hose

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

Vacuum pump

A conventional vacuum pump can be used by installing a vacuum pump adapter. (Use of a vacuum pump with a series motor is prohibited.)

Gas leakage detector

Special gas leakage detector for HFC refrigerant R410A or R32.

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 value or capillary tube may become blocked with contaminants. As an air conditioner using R32 (R410A) incurs pressure higher than when using R22, it is necessary to choose adequate materials.

WARNING
· Do not use the existing (for R22) piping and flare nuts. If the existing materials are used, the pressure inside the refrigerant cycle will rise and cause failure, injury, etc. (Use the special R32/R410A materials.)
· Use (refill or replace with) specified refrigerant (R32) only. Use of unspecified refrigerant can cause product malfunction, burst, or injury.
· Do not mix any gas or impurities except specified refrigerant (R32). Inflow of air or application of unspecified material makes the internal pressure of the refrigerant cycle too high, and may cause product malfunction, burst of piping, or injury.
· 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.
· Do not turn on the power until all work has been completed.

CAUTION
This manual describes how to install the indoor unit only. To install the outdoor unit or branch box, (if any), refer to the installation manual included in each product.

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 to fall, water leakage, electric shock, or fire.
· The following installation parts are furnished. 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.
Do not discard any accessories needed for installation until the installation work has been completed.

CD-ROM Hanger

1

For suspending the indoor unit from ceiling
4

Drain hose insulation
Cable tie (large) Cable tie (small) Cable tie Coupler heat insulation (large)
Coupler heat insulation (small)
Special nut A (large flange)

Insulates the drain hose and vinyl hose
1

For fixing the drain hose 1

For remote controller and re-

1

mote controller cable binding

For electrical wiring 1

For indoor side pipe joint (gas) 1

For indoor side pipe joint (liquid) 1
For suspending the indoor unit from ceiling 4

Special nut B (small flange)

For suspending the indoor unit from ceiling
4

(*1) Not supplied for ART series
2.3. Pipe requirement
CAUTION
Refer to the installation manual of the outdoor unit for description of the length of connecting pipe or for difference of its elevation.

Model
22/24 30/36/45

Diameter [mm (in)]

Gas pipe

Liquid pipe

12.70 (1/2)

6.35 (1/4)

15.88 (5/8)

9.52 (3/8)

· Use pipe with water-resistant heat insulation.

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CAUTION
· Wrap heat insulation around both gas pipe and liquid pipe. No heat- insulation work or incorrect heat-insulation work may cause water leaks.
· In a reverse cycle model, use heat insulation with heat resistance above 120 °C. · If expected humidity of the installation location of refrigerant pipes is higher than
70 %, wrap the heat insulation around the refrigerant pipes. If the expected humidity is between 70 % and 80 %, use heat insulation that has a thickness of 15 mm or more. If the expected humidity is higher than 80 %, use heat insulation that has a thickness of 20 mm or more. · The use of thinner heat insulation than specified above, may cause a condensation on the surface of the insulation. · Use heat insulation with thermal conductivity of 0.045 W/(m·K) or less, at 20 °C.

2.4. Electrical requirement
The indoor unit is powered from the outdoor unit. Do not power indoor unit from separate power source.
WARNING
Standard for electrical wiring and equipment differs in each country or region. Before you start electrical working, confirm related regulations, codes, or standards.

Cable

Conductor size (mm2)

Type

Connection cable

1.5 (MIN.)

Type 60245 IEC57

Remarks 3Wire+Ground (Earth),
1 230V

Cable Length: Limit voltage drop to less than 2%. Increase cable gauge if voltage drop is 2% or more.

Cable

Conductor size (mm2)

Remote controller

cable

0.33 to 1.25

(2-wire type)

Remote controller

cable

0.33

(3-wire type)

Type
Sheathed PVC cable
Sheathed PVC cable

Remarks Non-polar 2-wired,
twisted pair
Polar 3-wired

2.5. Optional parts

Refer to each installation manual for the method of installing optional parts.

Parts name
Wired remote controller
WLAN interface Remote sensor unit IR Receiver kit External connect kit Square flange Round flange Long-life filter Drain pump unit

Model No.

Application

UTY-RNRZ For air conditioner operation UTY-RLR* (2-wired type)

UTY-RVNM For air conditioner operation UTY-RNNM (3-wired type)

UTY-TFSXZ1 For wireless LAN control

UTY-XSZX Room temperature sensor

UTY-LBT*M For wireless remote controller

PCB terminal For control input port UTY-XWZXZG For control output port

UTD-SF045T

UTD-RF204

UTD-LF25NA

UTZ-PX1NBA

3. INSTALLATION WORK
3.1. Selecting an installation location
Especially, the installation place is very important for the split type air conditioner because it is very difficult to move from place to place after the first installation.
WARNING
Install the indoor unit where is capable to support the weight of the unit. Secure the unit firmly so that the unit does not topple or fall.
CAUTION
Do not install the unit in the following areas: – Area with high salt content, such as at the seaside. It will deteriorate metal parts, caus-
ing 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 where is close to heat sources. – 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 that can cause combustible gas to leak, contains suspended carbon fibers or flammable dust, or volatile in flammables such as paint thinner or gasoline. – If gas leaks and settles around the unit, it can cause a fire. – Area where animals may urinate on the unit or ammonia may be generated.
· Do not use the unit for special purposes, such as storing food, raising animals, growing plants, or preserving precision devices or art objects. It can degrade the quality of the preserved or stored objects.
· Install the unit where drainage does not cause any trouble. · Install the indoor unit, outdoor unit, power supply cable, transmission cable, and re-
mote control 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.
Decide the mounting position with the customer as follows:
(1) Install the indoor unit in a location having sufficient strength to support the weight of the indoor unit.
(2) The inlet and outlet ports should not be obstructed; the air should be able to blow all over the room.
(3) Leave the space required to service the air conditioner.
(4) Locate where the air can be distributed evenly throughout the room by the unit.
(5) Install the unit where connection to the outdoor unit is easy.
(6) Install the unit where the connection pipe can be easily installed.
(7) Install the unit where the drain pipe can be easily installed.
(8) Install the unit where noise and vibration is not amplified. (9) Take servicing, etc., into consideration and leave the spaces. Also install the unit
where the filter can be removed. (10) Providing as much space as possible between the indoor unit and the ceiling will
make work much easier.
(11) If installing in a place where its humidity exceeds 80%, use heat insulation to prevent condensation.
3.2. Installation dimension
Provide the space around the unit as shown in the following figure.

300 or more

2500 or more (When no ceiling)
Floor

150 or more

Unit : mm

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Maintenance hole dimensions: It shall be possible to install and remove the control box.
Maintenance hole
Control box

3.3.2. Body installation Slide the unit in the arrow direction and fasten it.
Hanging bolt M10 (locally purchased)

Special nut A
Washer (locally purchased)

Special nut B

Hanger

Unit : mm
It shall be possible to install and remove the control box, fan units and filter. Maintenance hole Intake panel

Control box

1550

3.3. Installing the unit

Unit : mm

WARNING
· Install the air conditioner in a location which can withstand a load do at least 5 times the weight of the main unit and which will not amplify sound or vibration. If the installation location is not strong enough, the indoor unit may fall and cause injuries.
· If the job is done with the panel frame only, there is a risk that the unit will come loose. Please take care.
3.3.1. Installing the hangers
WARNING
When fastening the hangers, make the bolt positions uniform. Hanging bolt installation diagram. (Example)

(Top side)

Bolt Strength [N·m (kgf·cm)]

9.81 to 14.71 (100 to 150)

CAUTION
Fasten the unit securely with special nuts A and B.
3.3.3. Leveling Base vertical direction leveling on the unit (right and left).

(Left side)

Lever meter

0-5 mm
AIR AIR

Base horizontal direction leveling on top of the unit.
Drain hose
Give a slight tilt to the side to which the drain hose is connected. The tilt should be in the range of 0 mm to 5 mm.
3.4. Intake duct connection
Follow the procedure in the following figure to the ducts. 1015
Unit : mm The air inlet duct can be changed by replacing the intake grille and flange.

(Left side)
Unit : mm The distance of is adjustable according to the place of the hanging bolts. (MAX : 550 mm, MIN : 410 mm)

For the bottom air intake, follow the procedure of 12 for installation. (The factory setting is back air intake.)
1

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2
CAUTION
When air is taken in from the bottom side, the operating sound of the product will easily enter the room. Install the product and intake grilles where the affect of the operating sound is small.

CAUTION
· If an intake duct is installed, take care not to damage the temperature sensor. · Be sure to install the air inlet grille and the air outlet grille for air circulation. The correct
temperature cannot be detected.
Unit

Air Outlet Grille (Room)

Air Inlet Grille

· When connecting the duct, perform duct-insulation that is appropriate for the installing environment.
· Inappropriate insulation work may cause condensation on the surface of the insulating material, and may lead condensation drip. Grills must be fixed so that man cannot touch indoor unit fan, and cannot be removed by only hand operation without tool.
· Be sure to install the air filter in the air inlet. If the air filter is not installed, the heat exchanger may be clogged and its performance may decrease.

3.5. Outlet duct connection

Duct installation pattern ( (1) Square duct

CUT PART)

(2) Round duct outlet ×4 (This is the factory setting.)
When using as a square duct (1) Cut the slit seam with a cutter.

CAUTION
· Check that duct work does not exceed the range of external static pressure of equipment.
· Make sure to insulate ducts to avoid the dew condensation. · Make sure to insulate between ducts and walls if metal ducts are used. · Please explain handling and washing methods of locally purchased materials to the
customer. · To prevent people from touching the parts inside the unit, be sure to install grilles on
the inlet and outlet ports. The grilles must be designed in such a way that cannot be removed without tools. · When connecting the duct to the outlet port of the indoor unit, be sure to insulate the outlet port and the installation screws to prevent water from leaking around the port.
3.6. Drain installation
Install the drain hose according to the measurements given in the following figure.

(Left side)

Liquid pipe Drain pipe Gas pipe 38 mm (O.D.)

(Right side)

(2) Turn up the insulation around the points to be cut according to the outlet port shape

working points so that the insulation does not stick out at the

part.

Cut

Cut

Cut

Cut

(3) Cut with nippers and remove the sheet metal. (4) Since there is a slit in the insulation, use radio pliers, tweezers, etc. to stretch the
screw hole part used when installing the round flange and square flange when connecting the duct.

Drain pipe 38 mm (O.D.)
The drain cap is attached at the factory setting.
Unit : mm
CAUTION
Install the drain hose in accordance with the instructions in this Installation Manual and keep the area warm enough to prevent condensation. Problems with the piping may lead to water leaks.
NOTE: Install the drain hose.
· Install the drain hose with downward gradient (1/50 to 1/100) and so there are no rises or traps in the hose.
· Use general hard polyvinyl chloride pipe (VP25) [outside diameter 38 mm] and connect it with adhesive (polyvinyl chloride) so that there is no leakage.
· When the hose is long, install supporters. · Do not perform air bleeding. · Always heat insulate the indoor side of the drain hose.

Outlet air flow

Drain hose

Trap

GOOD Arrange the drain hose lower than this portion.

PROHIBITED

PROHIBITED

Rise

PROHIBITED

Air bleeding

Supporter 1.5 to 2 m

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· When the unit is shipped from the factory, the drain port is on the left side (control box side). · When using the drain port on the right side of the unit, reinstall the drain cap to the left
side drain port.

Drain port

Drain cap

Cable tie

CAUTION
Always check that the drain cap is installed to the unused drain port and is fastened with the Cable tie. If the drain cap is not installed, or is not sufficiently fastened by the Cable tie, water may drip during the cooling operation.
· Cut the drain hose insulation at a position approximately 80 mm from the end with cutters, etc.
· Stick the large drain hose insulation at the drain hose installation side. · Stick the small drain hose insulation at the drain cap side.
Cut line

Drain hose insulation (large)
unit unit
Drain hose

Drain hose insulation (small)

Unit

Unit

Drain hose insulation (large)
Drain hose
Drain hose insulation (small)

Drain cap · Cover the drain cap with the drain hose insulation

Unit : mm

3.7. Pipe installation

CAUTION
· Be careful that foreign matter (oil, water, etc.) does not enter the piping with refrigerant R32 models. Also, when storing the piping, securely seal the openings by pinching, taping, etc.
· While brazing the pipes, be sure to purge with dry nitrogen gas.
3.7.1. Pipe connection
WARNING
Tighten the flare nuts with a torque wrench using the specified tightening method. Otherwise, the flare nuts could break after a prolonged period, causing refrigerant to leak and generate a hazardous gas if the refrigerant comes into contact with a flame.

Flaring

Use special pipe cutter and flare tool designed for R410A or R32 pipework. (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 any burrs. (3) Insert the flare nut (always use the flare nut attached to the indoor unit(s) and outdoor
unit or branch box respectively) onto the pipe and perform the flare processing with a flare tool. Use the special R410A or R32 flare tool, or the conventional flare tool. Leakage of refrigerant may result if other flare nuts are used. (4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from entering the pipes.

Check if [L] is flared uniformly

B

and is not cracked or scratched.

Die

A

Pipe

L

Pipe outside diameter [mm (in)] 6.35 (1/4) 9.52 (3/8) 12.70 (1/2) 15.88 (5/8) 19.05 (3/4)

Dimension A [mm] Flare tool for R32, clutch type
0 to 0.5

Dimension

B0 -0.4

[mm]

9.1 13.2 16.6 19.7 24.0

When using conventional flare tools to flare R32 pipes, the dimension A should be approximately 0.5 mm more than indicated in the table (for flaring with R32 flare tools) to achieve the specified flaring. Use a thickness gauge to measure the dimension A.

Width across flats

Pipe outside diameter [mm (in)] 6.35 (1/4) 9.52 (3/8) 12.70 (1/2) 15.88 (5/8) 19.05 (3/4)

Width across flats of Flare nut [mm] 17 22 26 29 36

NOTES: The flare nut specification is compliant with ISO14903.

Bending pipes
· If pipes are shaped by hand, be careful not to collapse them. · Do not bend the pipes in an angle more than 90°. · When pipes are repeatedly bend or stretched, the material will harden, making it
difficult to bend or stretch them any more.
· Do not bend or stretch the pipes more than 3 times.

CAUTION
· To prevent breaking of the pipe, avoid sharp bends. · If the pipe is bent repeatedly at the same place, it will break.
Flare connection
CAUTION
· Be sure to install the pipe against the port on the indoor unit correctly. If the centering is improper, the flare nut cannot tighten 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.
· Do not use mineral oil on flared part. Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.
· Be sure to connect the gas pipe after connecting the liquid pipe completely.
(1) Detach the caps and plugs from the pipes. (2) Center the pipe against the port on the indoor unit, and then turn the flare nut by
hand. (3) When the flare nut is tightened properly by your hand, hold the body side coupling
with a separate spanner, then tighten with a torque wrench. (See the table below for the flare nut tightening torques.)

CAUTION
· Hold the torque wrench at its grip, keeping it at a right angle with the pipe, in order to tighten the flare nut correctly.
· Tighten the flare nuts with a torque wrench using the specified tightening method. Otherwise, the flare nuts could break after a prolonged period, causing refrigerant to leak and generate a hazardous gas if the refrigerant comes into contact with a flame.
· Connect the piping so that the control box cover can easily be removed for servicing when necessary.
· In order to prevent water from leaking into the control box, make sure that the piping is well insulated.
When the flare nut is tightened properly by your hand, hold the body side coupling with a separate spanner, then tighten with a torque wrench. (See the table below for the flare nut tightening torques.)
Tighten with 2 wrenches.
Holding wrench

Torque wrench

Flare nut

Indoor unit pipe (Body side)

Connection pipe

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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.
.
3.8. Electrical wiring

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 1,100)

WARNING
· Electrical work must be performed in accordance with this Manual by a person certified under the national or regional regulations. Be sure to use a dedicated circuit for the unit. An insufficient power supply circuit or improperly performed electrical work can cause serious accidents such as electric shock or fire.
· Before starting work, check that power is not being supplied to the indoor unit and outdoor unit.
· For wiring, use the prescribed type of cables, connect them securely, making sure that there are no external forces of the cables applied to the terminal connections. Improperly connected or secured cables can cause serious accidents such as overheating the terminals, electric shock, or fire.
· Securely install the electrical box cover on the unit. An improperly installed electrical box cover can cause serious accidents such as electric shock or fire through exposure to dust or water.
· Install sleeves into any holes made in the walls for wiring. Otherwise, a short circuit could result.
· Use the included connection cables and power cables or ones specified by the manufacturer. Improper connections, insufficient insulation, or exceeding the allowable current can cause electric shock or fire.
· Do not modify the power cables, use extension cables, or use any branches in the wiring. Improper connections, insufficient insulation, or exceeding the allowable current can cause electric shock or fire.
· Match the terminal block numbers and connection cable colors with those of the outdoor unit or branch box. Erroneous wiring may cause burning of the electric parts.
· Securely connect the connection cables to the terminal board. In addition, secure the cables with wiring holders. Improper connections, either in the wiring or at the ends of the wiring, can cause a malfunction, electric shock, or fire.
· Always fasten the outside covering of the connection cable with the cable clamp. (If the insulator is chafed, electric leakage may occur.)
· Install a earth leakage breaker. In addition, install the earth leakage breaker so that the entire AC main power supply is cut off at the same time. Otherwise, electric shock or fire could result.
· Always connect the earth cable. Improper grounding work can cause electric shocks.
· Install the remote controller cables so as not to be direct touched with your hand. · Perform wiring work in accordance with standards so that the air conditioner can be
operated safely and positively. · Connect the connection cable firmly to the terminal board. Imperfect installation may
cause a fire.

3.8.1. Wiring system diagram

Connection diagrams

Standard pair: Connection cable
Indoor unit

Ground (Earth) line

Power line

Outdoor unit

Control line

flexible multi-split type

Connection cable

Indoor unit

Ground (Earth) line

Outdoor unit

Power line

UNIT A

Indoor unit

Control line

UNIT B

Simultaneous twin (22/24 model only) Connection cable

Indoor unit (Primary)

Junction box (Locally purchased)

Ground (Earth) line

Outdoor unit

Indoor unit (Secondary)

Ground (Earth) line Control line Power line

CAUTION
· Ground the unit. Do not connect the earth cable to a gas pipe, water pipe, lightning rod, or a telephone earth cable. Improper grounding may cause electric shock.
· Do not connect power supply cables to the transmission or remote controller terminals, as this will damage the product.
· Never bundle the power supply cable and transmission cable, remote controller cable together. Separate these cable by 50 mm or more. Bundling these cables together will cause miss operation or breakdown.
· When handling PCB, static electricity charged in the body may cause malfunction of the PCB. Follow the cautions below: – Establish a ground for the indoor and outdoor units and peripheral devices. – Cut power (breaker) off. – Touch metal part of the indoor and outdoor units for more than 10 seconds to discharge static electricity charged in the body. – Do not touch terminals of parts and patterns implemented on PCB.

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Wired remote controller is recommended using simultaneous twin or triple connection.
CAUTION
· Tighten the indoor unit connection cable and power supply indoor and outdoor unit, branch box terminal board connections firmly with the terminal board screws. Faulty connection may cause a fire.
· If the indoor unit connection cable and power supply are wired incorrectly, the air conditioner may be damaged.
· Connect the indoor unit connection cable by matching the numbers of the outdoor and indoor units terminal board numbers as shown in terminal label.
· Ground (Earth) both the indoor and outdoor, units by attaching a ground (earth) cable. · Unit shall be grounded in compliance with the country or region’s regulations.
CAUTION
· Be sure to refer to the above diagram for do correct field wiring. Wrong wiring causes malfunction of the unit.
· Check local electrical rules and also any specific wiring instructions or limitation.
3.8.2. Connection cable preparation Connection cable
Keep the ground (earth) wire longer than the other wires.

20 mm

Ground (Earth) wire
· Use a 4-core wire cable. Remote controller cable For 2-wire type

50 mm or more

Connection cable

For 3-wire type

30 mm

30 mm

How to connect wiring to the terminals.
(1) Use ring terminals with insulating sleeves as shown in the figure below to connect to the terminal block.
(2) Securely crimp 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. (6) See the table below for the terminal screw tightening torques. (7) Please do not fix 2 power supply cables with 1 screw.

WARNING
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.

M4 screw M5 screw

Tightening torque [N·m (kgf·cm)] 1.2 to 1.8 (12 to 18) 2.0 to 3.0 (20 to 30)

Wire

Screw with special washer
Ring terminal
Terminal blocks

Wire

Screw with special washer
Ring terminal

3.8.3. Connection wiring
CAUTION
· Be careful not to mistake the power supply cable and connection wires when installing.
· Install so that the wires for the remote controller will not come in contact with other connection wires.
(1) Remove the control box cover and install each connection wire.

Connection cable

Screw Control box cover
12 3

Control line Power line

Outdoor unit Ground (Earth)
Remote controller cable

Connection cable (power supply)

DIP switch

Print circuit board (PCB)

2-wire type

Y1 Y2 Y3 1 2

TO REMOTE CONTROL UNIT

Ex IN

3-wire type

Y1 Y2 Y3 1 2

TO REMOTE CONTROL UNIT

Ex IN

White Red

Earth

Remote

controller

cable

Remote controller

Black

White

Red

Earth

Remote

controller

cable

Remote controller

Factory setting

“2 WIRE”

Connecting the Optional parts

Set to “3 WIRE”

*Ground (Earth) the remote controller if it has a ground (earth) wire.

NOTES: Be sure to change the DIP SW to the corresponding remote controller.
When a 2-wire remote controller is connected to a “3WIRE” setting, power will not be supplied.
When a 3-wire remote controller is connected to a “2WIRE” setting, a communication error will be detected.

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Connection method
After wiring is complete, secure the remote controller cable, connection cable, and power supply cable with the cable clamps.

(2) Install the round flange (option parts) to the fresh air intake.

Round duct
(3) Connect the duct to the round flange. (4) Seal with a band and vinyl tape, etc. so that air does not leak from the connection.

Connection cable (to outdoor unit)
Cable clamp

Remote controller cable

(2) Install control box cover.

Cable clamp

Duct

4. OPTIONAL INSTALLATION WORK

4.1. Optional kit installation

WARNING
Regulation of cable differs from each locality, refer in accordance with local rules.

CN106

CN9

CN8

CN48

CN47

Adjust the position of the screws for control box cover according to the installation.
CAUTION
Do not bundle the remote controller cable, or wire the remote controller cable in parallel, with the indoor unit connection wire (to the outdoor unit) and the power supply cable. It may cause erroneous operation.
3.9. Remote controller installation
.
To install and set the remote controller, refer to the installation manual of the remote controller (wired type).
3.10. Fresh air intake
(Processing before use) (1) When taking in fresh air, cut a slit shaped cabinet in the left side of the outer case with
nippers.
Cut
Cut Cabinet (iron plate)
CAUTION
· When removing the cabinet (iron plate), be careful not to damage the indoor unit internal parts and surrounding area (outer case).
· When processing the cabinet (iron plate), be careful not to injure yourself with burrs, etc.

This air conditioner can be connected with the following optional kits. For details on how to install optional parts, refer to the installation manual included in each item.

Connector No. CN8 CN48
CN471 CN106 ( Drain pump )
CN9 ( Float SW ) CN65 2

Option type Remote sensor unit (UTY-XSZX)
IR Receiver kit (UTY-LBT*M) External output (UTY-XWZXZG)
Drain pump unit (UTZ-PX1NBA)
Other optional parts

1: For external output terminal setting, refer to Function No.60 in “6. F U N C T I O N S E TTING”.
2: Other options (WLAN adapter, converters, etc.) may be connectable. Please refer to the technical data for details. Notes: Options connecting to CN65 cannot be used at the same time.

4.2. External input and output
4.2.1. External input · Indoor unit functions such as Operation/Stop or Forced stop can be done by using
indoor unit terminals. · “Operation/Stop” mode or “Forced stop” mode can be selected with function setting of
indoor unit. · A twisted pair cable (22 AWG) should be used. Maximum length of cable is 150 m (492 ft.). · Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed.

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· The wire connection should be separate from the power cable line. Terminal

Y1 Y2 Y3 1 2

TO REMOTE CONTROL UNIT

Ex IN

Connected device
Dry contact terminal When a power supply is unnecessary at the input device you want to connect, use the Dry contact terminal.

*1

Terminal

(External in)

Connected device *1: The switch can be used on the following condition: DC 12 V to 24 V, 1 mA to 15 mA.

Operation behavior Input signal type
ON OFF Edge

When function setting is “Operation/Stop” mode 1.

Input signal

Command

OFF ON

Operation

ON OFF

Stop

When function setting is “Forced stop” mode.

Input signal

Command

OFF ON

Forced stop

ON OFF

Normal

• When the forced stop is triggered, indoor unit stops and Operation/Stop operation by a remote controller is restricted.

When function setting is “Operation/Stop” mode 2.

Input signal

Command

OFF ON

Operation

ON OFF

Stop (R.C. disabled)

4.2.2. External output
· A twisted pair cable (22AWG) should be used. Maximum length of cable is 25 m (82 ft.). · Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed. · Output voltage: Hi DC12V±2V, Lo 0V. · Permissible current: 50mA

Output select When interlocking with external device
Connected device Relay (locally purchased)
or When displaying “Operation/Stop”
Resistor
LED

PCB CN47
PCB CN47

Connected device

Operation behavior
*If function setting “60” is set to “00”

Function setting 00
09 60
10
11

Stop

Status

Operation

Normal

Error

Indoor unit fan stop

Indoor unit fan operation

External heater OFF

External heater ON

Output voltage 0V
DC 12 V 0V
DC 12 V 0V
DC 12 V 0 V
DC 12V

4.2.3. Connection methods
Wire modification · Remove insulation from wire attached to wire kit connector. · Remove insulation from locally purchased cable. Use crimp type insulated butt
connector to join field cable and wire kit wire. · Connect the wire with connecting wire with solder.

IMPORTANT: Be sure to insulate the connection between the wires.

Locally purchased

Option parts External output wire

Solder and insulate the connected parts. · Connecting wires to the terminals.
Use ring terminals with insulating sleeves to connect to the terminal block.
4.3. Remote sensor (Optional parts)
4.3.1. Connection method · Remove the existing connector and replace it with the remote sensor connector (ensure
that the correct connector is used). · The original connector should be insulated to ensure that it does not come into contact
with other electrical circuitry.
4.3.2. Setting for room temperature correction When a remote sensor is connected, set the function setting of indoor unit as indicated below.
· Function Number “30”: Set the Setting Number to “00”. (Default)
· Function Number “31”: Set the Setting Number to “02”.

• Refer to “6. FUNCTION SETTING” for details about Function number and Setting value
  4.4. IR receiver unit (Optional parts)
  · For the installation method, please refer to the installation manual of IR receiver unit. 4.4.1. Connection method · Use 7 pins for receiver unit cable. · At first, connect the receiver unit cable to the controller PCB. · Attach the core that comes between controller PCB and the clamp.
  5. REMOTE CONTROL INSTALLATION
  .
  CAUTION
  · When setting DIP switches, do not touch any other parts on the circuit board directly with your bare hands.
  · Be sure to turn off the main power.
  5.1. Group control
  CAUTION
  Group control is only possible between units with remote controllers of the same type. To confirm the type of remote controller, see the back of the remote controller or “2.2. Accessories”.
  A number of indoor units can be operated at the same time using a single remote controller.

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(1) Connect up to 16 indoor units in a system. (indoor unit to remote controller)

I.U.

I.U.

I.U.

I.U.

B

C

D

E

A

Remote controller

A, B, C, D, E : Remote controller cable. (Refer to “2.4. Electrical requirement”) A+B+C+D+E 500 m. Example of wiring method (2-wire type)
Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4

123

123

123

123

123 Y1 Y2

Remote controller cable

Remote controller

Bus wire

(2) Set the R.C. address (DIP switch setting) Set the R.C. address of each indoor unit using the DIP switch on the indoor unit circuit board.

SW100

(a) 2-wire type
DIP switch (RC AD SW)…Factory setting “00” Since the remote controller address settings are automatically configured, you do not need to configure them. If configuring manually, it is necessary to configure both the indoor unit and the remote controller. For details, please refer to the remote controller installation manual.

(b) 3-wire type DIP switch (RC AD SW)…Factory setting “00” When connecting multiple indoor units to 1 standard wired remote controller, set the address at RC AD SW in sequence from “00”.

Setting

Setting range

Switch

Remote controller address

00 to 15

Setting example 00

ON
1 234
RC AD

Example If 4 indoor units are connected.

Indoor unit 1 RC AD SW 00

Indoor unit 2 RC AD SW 01

Indoor unit 3 RC AD SW 02

Indoor unit 4 RC AD SW 03

Set the R.C. address in accordance with the table below.

Indoor unit R.C. address

1

1

00

OFF

2

01

ON

3

02

OFF

4

03

ON

5

04

OFF

6

05

ON

7

06

OFF

8

07

ON

9

08

OFF

10

09

ON

11

10

OFF

12

11

ON

13

12

OFF

14

13

ON

15

14

OFF

16

15

ON

DIP SWITCH No.

2

3

OFF

OFF

OFF

OFF

ON

OFF

ON

OFF

OFF

ON

OFF

ON

ON

ON

ON

ON

OFF

OFF

OFF

OFF

ON

OFF

ON

OFF

OFF

ON

OFF

ON

ON

ON

ON

ON

4 OFF OFF OFF OFF OFF OFF OFF OFF ON ON ON ON ON ON ON ON

NOTE Be sure to set consecutive R.C. address. The indoor units cannot be operated if a number is skipped.

NOTE Be sure to set the unit numbers sequentially.

(3) Remote controller setting 1. Turn on all of the indoor units.

Turn on the indoor unit with the unit number 00 last. (Within 1 minute)

2. Set the refrigerant circuit address. (Assign the same number to all of the indoor units connected to an outdoor unit.)

Indoor unit 1

Unit number 00

Function Number Setting Value

2

01

02

00~15

E

14

F

15

3. Set the “primary” and “secondary” settings. (Set the indoor unit that is connected to the outdoor unit using a transmission cable as the “primary”.)

Primary Secondary

Function Number 51

Setting Value 00 01

4. After completing the function settings, turn off all of the indoor units, and then turn them back on. * If error code 21, 22, 24, or 27 is displayed, there may be an incorrect setting. Perform the remote controller setting again.
NOTES: · When different indoor unit models are connected using the group control system, some functions may no longer be available. · If the group control system contains multiple units that are operated simultaneously, connect and set the units as shown below. · Auto-changeover operates under the same mode with model unit number 00. · It should not be connected to any other Gr that is not of the same series (A**G only).

Standard Simultaneous

pair

twin

Out door unit

Out door unit

Simultaneous triple
Out door unit

Remote controller

Remote controller

Indoor unit

DIP switch setting (Indoor unit)
Unit number
Remote controller setting Refrigerant circuit address setting (Function number 02)
Setting value
Primary/Secondary setting (Function number 51)
Setting value

Indoor Indoor unit unit

Indoor Indoor Indoor unit unit unit

Transmission cable, Power supply cable Remote controller cable

Power supply cable Bus wire

Make sure that the indoor unit with the unit number 00 is connected to the outdoor unit using a transmission cable.

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5.2. Multiple remote control
· 2 separate remote controllers can be used to operate the indoor units. · The timer and self-diagnosis functions cannot be used on the secondary units. (1) Wiring method (indoor unit to remote controller)
Example of wiring method (3-wire type)
Indoor unit
Remote controller cable

2. Set the primary and secondary settings. Set the indoor unit that is not connected to the outdoor unit using a transmission cable as the “01” . (The setting value is factory-set to “00”.)

Indoor unit 1 2

Unit number 00 01

Function Number 51

Setting Value 00(primary)
01(secondary)

3. After completing the function settings, turn off all of the indoor units, and then turn them back on. * If error code 21, 22, 24 or 27 is displayed, there may be an incorrect setting. Perform the remote controller setting again.
Twin type

Out door unit

Primary unit

Secondary unit

Remote controller
(2) To switch between “the primary unit” and “the secondary unit”, refer to the installation manual of each wired remote controller.

5.3. Simultaneous multi system operation

· Ensure to use a 3-wire type wired remote controller. (Set the DIP switch to 3-wire type.) · When using a simultaneous multi system, a WLAN adapter cannot be used. · If connected to an indoor unit that supports R410A, an error message is displayed. Check
the machine type of the indoor unit to connect, and ensure to use an indoor unit supporting R32. · By combining with an outdoor unit, 2 units for twin indoor units, can be switched ON/OFF simultaneously.

(1) Wiring method · Refer to 3.8. Electrical wiring. · The indoor unit is connected the outdoor unit using a transmission cable is “primary”. · Connect the remote controller wire to the primary unit.

Twin type

Outdoor unit

Remote controller

Indoor unit [primary]

Indoor unit [secondary]

(2) DIP switch setting (Indoor unit) Set the unit number of each indoor unit using the DIP switches on the indoor unit circuit board. (See the following table and figure.) The DIP switches are normally set to make the unit number 00.

Indoor unit

Unit number

DIP SWITCH No.

1

2

3

4

1

00

OFF

OFF

OFF

OFF

2

01

ON

OFF

OFF

OFF

3

02

OFF

ON

OFF

OFF

DIP switches

Example : Unit number 02

Circuit board in the control box of indoor unit. NOTE: Be sure to set the unit numbers sequentially.
(3) Remote controller setting 1. Turn on all of the indoor units. Therefore, continue with the setting procedure.
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Remote controller

Indoor unit [primary]

DIP switch setting (Indoor unit)
Unit number
Remote controller setting
Unit number Setting value (Primary/secondary)

Indoor unit [secondary]

6. FUNCTION SETTING
.

CAUTION
· Confirm whether the wiring work for outdoor unit has been finished. · Confirm whether the cover for electric control box on the outdoor unit is close.
To change the function settings, refer to the procedures described in the installation manual of the remote controller (wired type). The function settings are as follows.

. 6.1. Function Details

Filter Sign

The indoor unit has a sign to inform the user that it is time to clean the filter. Select the time setting for the filter sign display interval in the table below according to the amount of dust or debris in the room. If you do not wish the filter sign to be displayed, select the setting value for “No indication”.

(… Factory setting)

Setting description

Function number

Setting value

Standard (2500 hours)

00

Long interval (4400 hours)

01

11

Short interval (1250 hours)

02

No indication

03

Static pressure

Select appropriate static pressure according to the installation conditions.

Setting description

Normal

High static pressure 1

High static pressure 2

Function number
21

(… Factory setting) Setting value
00 01 02

High static pressure 3

03

Determine the wind volume in each mode i.e., applicable range of static pressure, referring to “6.2. Static pressure characteristic” (The unit is factory-set to “00”.)

Room temperature control for indoor unit sensor

Depending on the installed environment, correction of the room temperature sensor may be required. Select the appropriate control setting according to the installed environment. The temperature correction values show the difference from the Standard setting “00” (manufacturer’s recommended value).

(… Factory setting)

Function Number

Setting Value
00
01

Setting Description

Standard setting

No correction 0.0 °C (0 °F)

02

-0.5 °C (-1 °F)

03

-1.0 °C (-2 °F)

04

-1.5 °C (-3 °F)

More

05

-2.0 °C (-4 °F)

Cooling

06

-2.5 °C (-5 °F)

Less

Heating

07

-3.0 °C (-6 °F)

30

31

08

(For cooling) (For heating)

09

-3.5 °C (-7 °F) -4.0 °C (-8 °F)

10

+0.5 °C (+1 °F)

11

+1.0 °C (+2 °F)

12

+1.5 °C (+3 °F)

Less

13

+2.0 °C (+4 °F)

Cooling

14

+2.5 °C (+5 °F)

More

Heating

15

+3.0 °C (+6 °F)

16

+3.5 °C (+7 °F)

17

+4.0 °C (+8 °F)

Room temperature control for wired remote controller sensor
Depending on the installed environment, correction of the wire remote temperature sensor may be required. Select the appropriate control setting according to the installed environment. To change this setting, set Function 42 to Both “01”. Ensure that the Thermo Sensor icon is displayed on the remote controller screen.
(… Factory setting)

Function Number

35

36

(For cooling) (For heating)

Setting Value
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17

Setting Description
No correction No correction 0.0 °C (0 °F)
-0.5 °C (-1 °F) -1.0 °C (-2 °F) -1.5 °C (-3 °F) -2.0 °C (-4 °F) -2.5 °C (-5 °F) -3.0 °C (-6 °F) -3.5 °C (-7 °F) -4.0 °C (-8 °F) +0.5 °C (+1 °F) +1.0 °C (+2 °F) +1.5 °C (+3 °F) +2.0 °C (+4 °F) +2.5 °C (+5 °F) +3.0 °C (+6 °F) +3.5 °C (+7 °F) +4.0 °C (+8 °F)

More Cooling
Less Heating
Less Cooling
More Heating

Auto restart Enable or disable automatic restart after a power interruption.
(… Factory setting)

Function Number
40

Setting Value
00 01

Setting Description

Enable

Disable

• Auto restart is an emergency function such as for power outage etc. Do not attempt to use this function in normal operation. Be sure to operate the unit by remote controller or external device.

Room temperature sensor switching
(Only for wired remote controller) When using the wired remote controller temperature sensor, change the setting to “Both” (01).
(… Factory setting)

Function Number
42

Setting Value
00
01

Setting Description

Indoor unit

Both

00: Sensor on the indoor unit is active. 01: Sensors on both indoor unit and wired remote controller are active. * Remote controller sensor must be turned on by using the remote controller

Remote controller custom code

(Only for wireless remote controller) The indoor unit custom code can be changed. Select the appropriate custom code.
(… Factory setting)

Function Number

Setting Value
00

Setting Description

A

01

B

44

02

C

03

D

External input control

“Operation/Stop” mode or “Forced stop” mode can be selected. (… Factory setting)

Function Number
46

Setting Value
00 01 02 03

Setting Description

Operation/Stop mode 1

(Setting prohibited)

Forced stop mode

Operation/Stop mode 2

Room temperature sensor switching (Aux.)

To use the temperature sensor on the wired remote controller only, change the setting to “Wired remote controller” (01). This function will only work if the function setting 42 is set at “Both” (01)
(… Factory setting)

Function Number
48

Setting Value
00
01

Setting Description

Both

Wired remote controller

Indoor unit fan control for energy saving for cooling
Enables or disables the power-saving function by controlling the indoor unit fan rotation when the outdoor unit is stopped during cooling operation.
(… Factory setting)

Function Number
49

Setting Value
00
01
02

Setting description

Disable

Enable

Remote controller

00: When the outdoor unit is stopped, the indoor unit fan operates continuously following the setting on the remote controller.
01: When the outdoor unit is stopped, the indoor unit fan operates intermittently at a very low speed.
02: Enable or disable this function by remote controller setting.

*When using a wired remote controller without Indoor unit fan control for energy saving for cooling function, or when connecting a single split converter, the setting cannot be made by using the remote controller. Set to “00” or “01”. To confirm if the remote controller has this function, refer to the operation manual of each remote controller.

Switching functions for external output terminal

Functions of the external output terminal can be switched. (… Factory setting)

Function Number
60

Setting Value
00 01 to 08
09 10 11

Setting Description

Operation status

(Setting prohibited)

Error status

Fresh air control

Auxiliary heater

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Setting record

Record any changes to the settings in the following table.

Filter sign Static pressure

Function setting

Room temperature control for indoor unit sensor

Room temperature control for wired remote controller sensor
Auto restart Room temperature sensor switching Remote controller custom code External input control Room temperature sensor switching (Aux.) Indoor unit fan control for energy saving for cooling Switching functions for external output terminal

Setting Value
cooling heating cooling heating

After completing the Function Setting, be sure to turn off the power and turn it on again.

6.2. Static pressure characteristic
CAUTION
If the applicable static pressure does not match the static pressure mode, the static pressure mode maybe changed to another mode automatically.
RECOMMENDED RANGE OF EXTERNAL STATIC PRESSURE [Pa] 30 to 150
1. STATIC PRESSURE MODE
It is necessary to set up a static pressure mode for each usage of static pressure. Determine the applicable range of static pressure in each mode and wind volume, referring to the Technical manual.
2. MODE SETTING
It is possible to change the setting of static pressure mode. Refer to “6. FUNCTION SETTING”

7. CHECK LIST

Pay special attention to the check items below when installing the indoor unit(s). After installation is complete, be sure to check the following check items again.

CHECK ITEMS

If not performed correctly

Has the indoor unit been installed correctly?

Vibration, noise, indoor unit may drop

Has there been a check for gas leaks (refrigerant pipes)?

No cooling, No heating

Has heat insulation work been completed?

Water leakage

Does water drain easily from the indoor units?

Water leakage

Are the wires and pipes all con- No operation, heat or burn dam-

nected completely?

age

Is the connection cable the specified thickness?

No operation, heat or burn damage

Are the inlets and outlets free of any obstacles?

No cooling, No heating

After installation is completed, has the proper operation and handling been explained to the user?

CHECK BOX

8. TEST RUN
. 8.1. Check items Is operation of each button on the remote control unit normal? Does each lamp light normally? Is the drain normal? Do not have an abnormal noise and vibration during operation?
Do not operate the air conditioner in test run for a long time.
. 8.2. Operation method
Depending on your installation, choose from the following:
By the wireless remote controller (with [TEST RUN] button) · To start test run, press the [START/STOP] button and the [TEST RUN] button on the
remote controller. · To end test run, press the remote controller [START/STOP] button. By the indoor unit or IR receiver unit · To start test run, press the [MANUAL AUTO] button of the unit for more than 10 seconds
(forced cooling). · To end test run, press the [MANUAL AUTO] button for more than 3 seconds or press
the remote controller [START/STOP] button. · The Operation indicator lamp and Timer indicator lamp will simultaneously flash during
the test run mode. By the wired remote controller · For the operation method, refer to the installation manual and the operation manual of
the wired remote controller.
Heating test run will begin in a few minutes when HEAT is selected by the remote controller [reverse cycle model only].
9. FINISHING

CAUTION
· After checking for gas leaks (refer to the Installation Manual of the outdoor unit), perform this section.
· Install heat insulation around both the large (gas) and small (liquid) pipes. Failure to do so may cause water leaks.

After checking for gas leaks, insulate by wrapping insulation around the two parts (gas and liquid) of the indoor unit coupling, using the Coupler Heat Insulation. After installing the Coupler Heat Insulation, wrap both ends with vinyl tape so that there is no gap.
Coupler heat insulation

Body

No gap

Be sure to overlap the insulation
No gap

Coupler heat insulation

CAUTION
Must fit tightly against body without any gap.

10. CUSTOMER GUIDANCE
Explain the following to the customer in accordance with the operation manual:
(1) Starting and stopping method, operation switching, temperature adjustment, timer, air flow switching, and other remote controller operations.
(2) Air filter removal and cleaning, and how to use the air louvers.
(3) Give the operating and installation manuals to the customer. (4) If the signal code is changed, explain to the customer how it changed (the system
returns to signal code A when the batteries in the remote controller are replaced). *(4) is applicable to using wireless remote controller.

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11. ERROR CODES

If you use a wired type remote controller, error codes will appear on the remote controller display. If you use a wireless remote controller, the lamps on the IR receiver unit will output error codes by way of blinking patterns. See the lamp blinking patterns and error codes in the table below. An error display is displayed only during operation. The error code contains errors irrelevant to this product as well.

Error display

Wired

OPERATION TIMER ECONOMY remote con-

lamp

lamp

lamp troller Error

(green) (orange) (green)

code

Description

(1)

(1)

Serial communication error

(1)

(2)

(1)

(5)

Wired remote controller communication error
Check run unfinished

(2)

(1)

(2)

(2)

Unit number or Refrigerant circuit address setting error [simultaneous multi- split type] Indoor unit capacity error

(2)

(3)

Combination error

(2)

(4)

(2)

(7)

(3)

(1)

· Connection unit number error (indoor secondary unit) [simultaneous multi- split type] · Connection unit number error (indoor unit or branch unit) [flexible multi-split type] Primary unit, secondary unit setup error [simultaneous multi-split type] Power supply interruption error

(3)

(2)

(3)

(5)

Indoor unit PCB model information error
Manual auto switch error

(4)

(1)

Room temp. sensor error

(4)

(2)

(5)

(1)

Indoor unit Heat Ex. Middle temp. sensor error
Indoor unit fan motor error

(5)

(3)

Drain pump error

(5)

(7)

Damper error

(5)

(15)

Indoor unit error

(6)

(2)

(6)

(3)

Outdoor unit main PCB model information error or communication error
Inverter error

(6)

(4)

Active filter error, PFC circuit error

(6)

(5)

Trip terminal L error

(6)

(10)

(7)

(1)

Display PCB microcomputers communication error
Discharge temp. sensor error

(7)

(2)

Compressor temp. sensor error

(7)

(3)

Outdoor unit Heat Ex. liquid temp. sensor error

Error display

Wired

OPERATION TIMER ECONOMY remote con-

lamp

lamp

lamp troller Error

(green) (orange) (green)

code

Description

(7)

(4)

Outdoor temp. sensor error

(7)

(5)

Suction Gas temp. sensor error

(7)

(6)

(7)

(7)

· 2-way valve temp. sensor error · 3-way valve temp. sensor error Heat sink temp. sensor error

(8)

(2)

(8)

(3)

· Sub-cool Heat Ex. gas inlet temp. sensor error
· Sub-cool Heat Ex. gas outlet temp. sensor error
Liquid pipe temp. sensor error

(8)

(4)

Current sensor error

(8)

(6)

(9)

(4)

· Discharge pressure sensor error · Suction pressure sensor error · High pressure switch error
Trip detection

(9)

(5)

(9)

(7)

Compressor rotor position detection error (permanent stop)
Outdoor unit fan motor 1 error

(9)

(8)

Outdoor unit fan motor 2 error

(9)

(9)

4-way valve error

(9)

(10)

Coil (expansion valve ) error

(10)

(1)

(10)

(3)

Discharge temp. error Compressor temp. error

(10)

(4)

High pressure error

(10)

(5)

Low pressure error

(13)

(2)

Display mode : 0.5s ON / 0.5s OFF
: 0.1s ON / 0.1s OFF
( ) : Number of flashing

Branch boxes error [flexible multi-split type]

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