ActronAir MCC-015CS Mini VRF 4 Way Compact Cassette Instruction Manual

ActronAir MCC-015CS Mini VRF 4 Way Compact Cassette

Product Information

ECOFLEX MINI VRF R32 SERIES Four-way Compact Cassette

Specifications:

• Model Numbers: MCC-015CS, MCC-022CS, MCC-028CS, MCC-036CS, MCC-045CS, MCC-056CS, MCC-063CS
• Refrigerant: R-32

Product Usage Instructions

Preface
Welcome to the installation and commissioning guide for the ECOFLEX MINI VRF R32 SERIES Four-way Compact Cassette. This guide will provide you with detailed instructions on how to install and operate your air conditioning unit. Please read this guide carefully before proceeding with the installation.

Safety Warning

Warning Signs
It is important to be aware that the system is charged with flammable refrigerant. To minimize the risk of ignition, follow the safety precautions mentioned in this guide.

Safety Precautions
Ensure that you are familiar with and adhere to the safety precautions provided in this guide to prevent accidents or injuries during installation and operation of the air conditioning unit.

Electric Safety Requirements
Follow the electric safety requirements mentioned in this guide to ensure safe installation and operation of the air conditioning unit.

Appendix

Refer to the appendix section for additional information and guidelines related to the safe use of the air conditioning unit.

Precautions

Qualification and Safety Regulation Requirements
Ensure that you meet the qualification and safety regulation requirements mentioned in this guide before proceeding with the installation.

Precautions for Carrying and Lifting the Air Conditioner
Follow the precautions mentioned in this guide while carrying and lifting the air conditioner to prevent damage or injuries.

Precautions for Installation Sites
Take into consideration the precautions mentioned in this guide when selecting the installation site for the air conditioning unit.

Recommended Installation Sites
Refer to the recommended installation sites section for guidance on selecting the best location for installing the air conditioning unit.

Components Overview

Get familiar with the components overview section to understand the different parts of the air conditioning unit.

Product Dimensions
Refer to the product dimensions section for detailed information on the size and dimensions of the air conditioning unit.

Accessories

Accessories available to be purchased separately
Explore the accessories available to enhance the functionality of your air conditioning unit. These accessories can be purchased separately.

Heat Insulation Material Requirements
Refer to this section to understand the heat insulation material requirements for the installation of your air conditioning unit.

Preparations Before Installation

Unpacking Check
Ensure that you perform an unpacking check to verify that all the necessary components and accessories are present before starting the installation process.

Indoor Unit Positioning
Follow the instructions provided in this section to determine the optimal positioning of the indoor unit for efficient cooling.

Installation Preparations
Prepare for the installation process by following the instructions mentioned in this section.

Indoor Unit Installation

Installation of Lifting Bolts
Learn how to properly install the lifting bolts for the indoor unit in this section.

Indoor Unit Installation
Follow the step-by-step instructions provided in this section to install the indoor unit of your air conditioning system.

Panel Installation
Learn how to install the panel of the indoor unit by following the instructions mentioned in this section.

Refrigerant Connecting Piping Installation

Length and Level Difference Requirements
Understand the length and level difference requirements for the refrigerant connecting piping installation as mentioned in this section.

Pipe Layout
Follow the recommended pipe layout guidelines provided in this section for proper installation of the refrigerant connecting piping.

Pipe Connection Steps
Follow the step-by-step instructions mentioned in this section to correctly connect the refrigerant piping.

Pipe Connection
Learn how to properly connect the refrigerant piping by following the instructions provided in this section.

Refrigerant Piping Fixing
Ensure that you fix the refrigerant piping securely by following the instructions mentioned in this section.

Vacuum Pumping Follow the instructions in this section to perform vacuum
pumping for the refrigerant piping.

Leak Detection
Learn how to perform leak detection for the refrigerant piping by following the instructions provided in this section.

Heat Insulation Treatment
Understand the heat insulation treatment requirements for the refrigerant piping as mentioned in this section.

Drainage Pipe Installation

Installation of Water Discharge Pipe for the Indoor Unit
Follow the instructions provided in this section to install the water discharge pipe for the indoor unit.

Water Discharge Test
Learn how to conduct a water discharge test for the installed drainage pipe by following the instructions mentioned in this section.

Electrical Connection

Follow the electrical connection instructions provided in this section to ensure a safe and proper connection of the air conditioning unit.

FAQ (Frequently Asked Questions)

Q: What refrigerant does the ECOFLEX MINI VRF R32 SERIES Four-way Compact Cassette use?
A: The air conditioning unit uses R-32 refrigerant.

Q: Where can I find additional safety information?
A: Additional safety information can be found in the R-32 Safety Manual and this installation and commissioning guide.

ECOFLEX MINI VRF R32 SERIES

Four-way Compact Cassette
Installation and Commissioning Guide

Model Numbers
MCC-015CS MCC-022CS MCC-028CS MCC-036CS MCC-045CS MCC-056CS MCC-063CS

CAUTION:
The system is charged with flammable refrigerant, safety checks are necessary to ensure that the risk of ignition is minimised.

IMPORTANT NOTE:
Please read the R-32 Safety Manual and this manual carefully before installing or operating your air conditioning unit. Information in this manual is to be used in conjunction with the R-32 Safety Manual. Make sure to save this manual for future reference.

Installation and Commissioning Guide

ECOFLEX MINI VRF R32 SERIES

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PREFACE

Dear users,
Thank you for purchasing and using our product. Please read this manual carefully before you install, use, maintain or troubleshoot this product so that you can familiarize yourself with the product and use it correctly.
For ODUs or other Indoor Units, please refer to the applicable installation & owner’s manuals provided with them.
For detailed operation of auxiliary control devices, such as wired, remote and centralized controllers, please refer to their instructions.
· To ensure the correct installation and operation of the product, the following instructions are provided:
· To ensure the correct and safe operation of the product, please strictly follow the requirements listed in this manual.
· All figures and contents in this manual are for reference only. Due to continuing product improvement, the specifications are subject to change without notice.
· Regular cleaning and maintenance of the product are required for intended performance and long service life. Each year before using the air conditioner, please contact your local dealer, and we will assign professionals to provide paid services of cleaning, maintenance, and inspection.
· Please retain this manual for future reference.

SAFETY WARNING
Please thoroughly read and ensure that you fully understand the safety precautions (including the signs and symbols) in this manual, and follow relevant instructions during use to prevent damage to health or property.

WARNING

This symbol shows that this appliance used a flammable refrigerant. If the refrigerant is leaked and exposed to an external ignition source, there is a risk of fire.

CAUTION

This symbol shows that the operation manual should be read carefully.

CAUTION

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

CAUTION

This symbol shows that information is available such as the operating manual or installation manual.

02.01. Warning Signs
Different marks are used to indicate the levels of hazard severity. Please follow the instructions and ensure safe operation:

DANGER Failure to observe the warning will result in severe personal injury or death.

WARNING Failure to observe the warning could result in severe personal injury or death, property damage, or electrical or fire hazards.

CAUTION Failure to observe the warning could result in minor personal injury, product or property damage, or other unsafe situations.
NOTE Useful operation and maintenance information.

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Warning Contets

ECOFLEX MINI VRF R32 SERIES

Ensure Proper Grounding
Prohibition signs

Professional Only

No Flammable Materials

No Strong Current

202.02. Safety Precautions DANGER

No Open Fire

No Acid or Alkali Materials

During thunderstorms, disconnect the main power switch. Otherwise, lightning may damage the unit.

In the event of refrigerant leakage, smoking and open flames are prohibited. Disconnect the main

power switch immediately, open windows to allow ventilation, keep away from the leakage point, and

contact your local dealer or technical support to request a professional repair.

OFF

WARNING
Air conditioner installation must comply with local standards and electrical codes, and relevant instructions in this manual.
Do not use any liquid cleanser, liquefied cleanser, or corrosive cleanser to wipe this unit or spray water or other liquids on the unit. Otherwise, the plastic parts of the unit will become damaged and an electrical shock may occur. Disconnect the main power switch before cleaning and maintenance to avoid accidents.
Ask a professional to remove and reinstall the air conditioner. Ask a professional for maintenance and repair assistance.
This air conditioner is classified as an “appliance which is not accessible to the general public”.
The Indoor Unit shall be placed at a height not accessible to children, at least 2.3m above the ground.

Indoor unit 2.3m

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CAUTION 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.
The units are partial unit air conditioners, complying with partial unit requirements of this International Standard, and must only be connected to other units that have been confirmed as complying to corresponding partial unit requirements of this International Standard.
02.03. Electric Safety Requirements

WARNING

· The air conditioner shall be installed according to the local wiring specifications. Wiring work must be completed by qualified electricians.

· All wiring work must comply with electrical safety specifications.

· The air conditioner must be well grounded. Specifically, the main switch of the air conditioner

must have a reliable grounding cable.

ir

· Before contacting wiring devices, cut off all the power supplies.

· The user MAY NOT disassemble or repair the air conditioner. Doing so can be dangerous. In the event of a fault, immediately cut off the power and contact your local dealer or technical support.

· A separate power supply that meets the rated parameter values must be provided for the air conditioner.

· The fixed wiring to which the air conditioner is connected must be equipped with a power cut-off device that meets the wiring requirements.

· To avoid danger, a damaged power cable must be replaced by professionals from the maintenance department or a similar department of the manufacturer.

· The air conditioner’s circuit board (PCB) is designed with a fuse to provide overcurrent protection.

· The specifications of the fuse are printed on the circuit board. N·NONOTOTNEET:OE:FTF:oEoFr:rotFhtroheterhuteuhnnueitinstusitwnswiittwishthiwtRhRi3tR3h223Rr2re3e2frrferirgifegrefiegrriraeganrenatrtn,a,tnoo,ntnol ,ylnoyltnyhthleytehtbebhlalebaslsbat-tls-paptrs-ortpo- orpoofrfococfeoecrfraeacmrmeairmciacimfcufusifcsueesfucecasaecnnacbnbaenebuebusesueesuddes..edd. .

CAUTION

Always ground the main power switch.
Do not use a damaged power cable and replace it if it is damaged.
When the air conditioner is used for the first time or is in a power-off state for a long time, it needs to be connected to the power supply and warmed up for at least 12 hours before use.

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02.04. Appendix
WARNING
The following applies to R32 refrigerant systems. · 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 following precautions shall be complied with prior to conducting work on
the system. · Work shall be undertaken under a controlled procedure so as to minimise 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. · 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. · If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand. Have a dry powder or CO2 fire extinguisher adjacent to the charging area. · 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. · 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. · 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; 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. · 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 no live electrical components and wiring are exposed whiule charging, recovering or purging the system; · that there is continuity of earth bonding. · 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.

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· 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 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. · 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. · 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 ageing or continual vibration from sources such as compressors or fans. · 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. · Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines shall be as short as possible to minimise the amount of refrigerant contained in them. · Prior to recharging the system it shall be pressure tested with OFN. DD.12 Decommissioning:
1. Become familiar with the equipment and its operation. 2. Isolate system electrically. 3. 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.
4. Pump down refrigerant system, if possible. 5. If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the
system. 6. Make sure that cylinder is situated on the scales before recovery takes place. 7. Start the recovery machine and operate in accordance with manufacturer’s instructions. 8. Do not overfill cylinders. (No more than 80 % volume liquid charge). 9. Do not exceed the maximum working pressure of the cylinder, even temporarily.

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10. Do not exceed the maximum working pressure of the cylinder, even temporarily. 11. 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. 12. Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked. · 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.
· Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines shall be as short as possible to minimise the amount of refrigerant contained in them.
· Prior to recharging the system it shall be pressure tested with OFN. DD.12 Decommissioning:
· Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. 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.
· 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.
· 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.
· Warning: disconnect the appliance from its power source during service and when replacing parts.
· These units are partial unit air conditioners, complying with partial unit requirements of this International Standard, and must only be connected to other units that have been confirmed as complying to corresponding partial unit requirements of this International Standard.

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03. PRECAUTIONS
03.01. Qualification and Safety Regulation Requirements
WARNING
· Please carry out the installation according to local standards. · Ask your local dealer or professionals to install the product.
This unit must be installed by professional technicians with relevant specialized knowledge. Users MAY NOT install the unit themselves; otherwise, faulty operations may cause the risks of fire, electrical shock, injury, or leakage, which could harm you or others or damage the air conditioner. · Never modify or repair the unit on your own. Otherwise, a fire, electric shock, injury or water leakage may occur. Get your local dealer or a professional to do so. · Ensure that the resIndoor Unital current device (RCD) is installed. The RCD must be installed. Failure to install it may result in electric shock. · When powering the unit, follow the regulations of the local electric company. Make sure that the unit is grounded reliably in accordance with laws. If the grounding is not completed correctly, it may cause electrical shock. · When moving, disassembling or reinstalling the air conditioner, get the assistance of your local dealer or a professional. If installed improperly, fire, electrical shock, injury, or water leakage may occur. · Use the optional accessories specified by our company. The installation of these accessories must be carried out by professionals. Improper installation may cause fire, electrical shock, water leakage and other hazards. · Use only power cables and communication cables that meet specification requirements. Properly connect all the wiring to make sure that no external forces are acting on the terminal blocks, power cables and communication cables. Improper wiring or installation may cause a fire. · The air conditioner must be grounded. Check whether the earth line is securely connected or broken. Do not connect the ground line to gas cans, water piping, lightning rods or telephone earth lines. · The main power switch of the air conditioner should be put in a position that is out of the reach of children. It should not be obstructed by flammable objects such as curtains. · Open flames are prohibited when refrigerant leaks are present. If the air conditioner is not cooling/heating properly, this may be caused by a refrigerant leak. If this occurs, contact your local dealer or a professional. The refrigerant in the air conditioner is safe, and usually does not leak. If there is refrigerant leakage in the room, it is easy for a fire to occur after contact with the heating units of the heater/electric stove/stove. Please disconnect the power supply of the air conditioner, extinguish the flames of appliances that produce a flame, and open the windows and doors of the room to allow ventilation and ensure that the concentration of refrigerant leakage in the room does not exceed a critical level; keep away from the leakage point, and contact the dealer or professional personnel. · After the refrigerant leakage is repaired, do not start the product until the maintenance personnel confirms that the leakage is fully repaired. · Before and after installation, exposing the unit to water or moisture will cause electrical parts short circuiting. Do not store the unit in a humid basement or expose it to rain or water. · Make sure the installation base and lifting are robust and reliable; Insecure installation of the base may cause the air conditioner to fall, leading to an accident. Take into full consideration the effects of strong winds, typhoons and earthquakes, and reinforce the installation. · Check whether the drainage pipe can drain the water smoothly. Improper installation of the pipeline may lead to water leakage, damaging furniture, electric appliances, and the carpet. · After installation, check whether the refrigerant is leaking. · Do not install the product in a location where there is a danger of flammable gas leaks. In the event of leakage of combustible gas, the combustible gas surrounding the Indoor Unit may cause a fire.

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WARNING
· Keep the Indoor Unit, Outdoor Unit, power cable, and connecting wires at least 1m away from the high-power radio equipment, to prevent electromagnetic interference and noise. For some electromagnetic waves, it is not enough to prevent noise even at a distance of more than 1m.
· In a room equipped with fluorescent lamps (rectifier type or fast start type), the signal transmission distance of the remote controller (wireless) may not reach the predetermined value. Install the Indoor Unit as far away from the fluorescent lamp as possible.
· Do not touch the fins of the heat exchanger, as this could cause injury. · For safety, please dispose of the packing materials properly.
Nails and other packaging materials may cause personal injury or other risks. Tear up the plastic packaging bag and dispose of it properly to prevent children from playing with it, leading to suffocation. · Do not cut off the power supply immediately after the Indoor Unit stops running. Some parts of the Indoor Unit like the valve body and water pump are still in operation. Please wait for at least 5 minutes before cutting off the power supply. Otherwise, water leakage and other faults may occur. · If the temperature and humidity in the ceiling mezzanine may exceed 30 RH80%, please put insulation material on the unit. Please use glass wool or foamed polyethylene as insulation material, the thickness of which is required to be 10mm or more, and can be stored in the ceiling opening. · For evaporating units and condensing units, the instructions or markings shall include a wording to assure that the maximum operating pressure is considered when connecting to any condenser unit or evaporator unit. · For evaporating units, condensing units and condenser units, the instructions or markings shall include refrigerant charging instructions. · A warning to assure that partial units shall only be connected to an appliance suitable for the same refrigerant. · This unit is a partial unit air conditioner, complying with partial unit requirements of this International Standard, and must only be connected to other units that have been confirmed as complying to corresponding partial unit requirements of this International Standard. · The electrical interfaces shall be specified with purpose, voltage, current, and safety class of construction. The SELV connection points, if provided, are to be clearly indicated in the instructions. · The connection point should be marked with the “read the instructions” symbol per ISO 7000-0790 (2004-01) and the Class III symbol according to IEC 60417-5180 (2003-02).
NOTE
This unit is equipped with a refrigerant leak detector for safety. To be effective, the unit must be electrically powered at all times after installation, other than when servicing.
If any supplemental unit is employed to detect leaked refrigerant, such unit shall also apply this marking or be accompanied by such instructions.
03.02. Precautions for Carrying and Lifting the Air Conditioner
1. Before carrying the air conditioner, determine the route that will be used to move it to the installation site.
2. Do not unseal the air conditioner until it is moved to the installation site.
3. When unpacking and moving the air conditioner, you must hold the hanger seat and not apply force to other parts, especially the refrigerant piping, drainage pipe and plastic accessories, so as to avoid damaging the air conditioner and causing personal injury.
4. Before installing the air conditioner, make sure that the refrigerant specified on the nameplate is used. For the installation of the Outdoor Unit, refer to the installation instructions in the Installation & Owner’s Manual attached with the Outdoor Unit.

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03.03. Precautions for Installation sites

WARNING Do not install or use the air conditioner in the following places
1. A place filled with mineral oil, fumes or mist, like a kitchen. Plastic parts will age and the heat exchanger will become dirty, eventually causing the air conditioner performance to deteriorate or leak water.
2. A place where there are corrosive gases, such as acid or alkaline gases. Copper pipes and copper welds will be corroded, resulting in refrigerant leakage.
3. A place exposed to combustible gases and using volatile combustible gases such as diluent or gasoline. The electronics in the air conditioner may cause the surrounding gas to ignite.
4. A place where there is equipment emitting electromagnetic radiation. The control system will fail and the air conditioner will not function properly.
5. A place where there is a high salt content in the air like a coastal area. 6. A place where an explosion may occur. 7. In vehicles or cabin rooms. 8. Factories with major voltage fluctuations in the power supplies. 9. Other special environmental conditions.
NOTE Air conditioner units of this series are designed to provide comfort. Do not use them in equipment rooms and rooms with precision instruments, food, plants, animals, or works of art.
03.04. Recommended Installation Sites
03.04.01. Selection principle for the installation site
It is recommended to install the air conditioner according to the design drawing of the HVAC engineer. The selection principle for the installation site is as follows:
1. Ensure that the airflow in and out of the Indoor Unit is reasonably organized to form an air circulation in the room.
2. Ensure Indoor Unit maintenance space.
3. The nearer the drainage pipe and copper pipe are to the Outdoor Unit, the lower the pipe cost is.
4. Prevent the air conditioner from blowing directly at the human body.
5. The closer the wiring is to the power cabinet, the lower the wiring cost is.
6. Keep the air-conditioning return air away from direct exposure to the sun in the room.
7. Be careful not to interfere with the light tank, fire pipe, gas pipe and other facilities.
8. The Indoor Unit should not be lifted in the places like load-bearing beams and columns that affect the structural safety of the house.
9. The wired controller and the Indoor Unit should be in the same installation space; otherwise, the sampling point setting of the wired controller needs to be changed.
Choose a site that fully complies with the following conditions and user requirements to install the air conditioning unit:
1. There is enough space for installation and maintenance. (See the diagrams on section 03.04.02.)
2. The ceiling is level, and the structure is strong enough to support the Indoor Unit. If necessary, take measures to reinforce the unit’s stability.
3. Airflow in/out of the machine is not obstructed, and the external air exerts minimum impact.
4. It is easy to supply airflow to every corner of the room. It is easy to drain fluids from the connected piping and water discharge piping.
5. There is no direct heat radiation.

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6. Avoid installation in narrow spaces or where there are more stringent noise requirements. 7. The Indoor Unit needs to be installed at a position greater than 2.3m and less than 3.5m from the ground. 8. Condensate water can be discharged smoothly. 9. The length of the piping between the indoor and Outdoor Units is within the permitted range. Refer to the
Installation & Owner’s Manual attached with the Outdoor Unit.

03.04.02. Installation space

(Unit: mm)

Louver Air outlet

1000

Air Outlet Display panel

1000

1000 Return air inlet

250 >2300
1000

Ceiling Air outlet Floor

Air inlet 590×590 (ceiling opening dimension)

Air outlet

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03.04.03. Recommended Installation Sites
Crowded places such as living rooms and offices
The air outlet must not face the areas where people frequently spend time, such as sofas and coffee tables. Instead, let the airflow exit from the side for enhanced comfort.
Air outlets at corners can be blocked with optional accessories (which can be found in the packaging material)

Blockage

Air outlet blocked

Use a knife to cut the blockage out of the packaging material.

InDiagram of a blocked air outlet

Dining room
As the dining room is generally next to the kitchen, which is usually filled with oily fumes, the central air conditioner can be installed in the middle of the ceiling. The air outlet must not face the dining table. Otherwise, dust on the air outlet on the ceiling may be blown onto the food. Keep the return air inlet as far away from the kitchen as possible to avoid intaking oily fumes and affecting the air quality.

Bedroom
The unit can be installed on the ceiling in the middle of the bedroom. Avoid direct streams of air towards the bed if possible.

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04. COPaMrtPDOesNcrEipNtiToSn OVERVIEW

ECOFLEX MINI VRF R32 SERIES

16

8

14

15 7 6 5 4 3 2 1

12

9

10

13

11

1 Indoor Unit 4 Expanded air inlet/outlet 7 Gas pipe 10 Wired controller (optional) 13 Access hole 16 North American inlet hole (two)

2 Panel (optional) 5 Fresh air inlet 8 Drainage pipe 11 Remote controller (optional) 14 Power cable and ground wire To be purchased separately

3 Air outlet 6 Liquid pipe 9 Connection wire 12 Electric control box 15 Communication line

NOTE
· Panels, wired controllers, and remote controllers are available in various models. All optional accessories can be purchased from ActronAir.
· For optional accessories such as wired controllers, please refer to the instructions of the product. · All the figures in the manual explain only the general appearance and functions of the product. The appearance and
functions of the product you purchased may not be completely consistent with those listed in the figures. Please refer to the actual product.
Note

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05. PRODUCT DIMENSIONS
NOTE · Drawing for illustration purposes only (may vary depending on capacity), not to scale. · All dimensions are in mm unless otherwise specified. Refer to corresponding unit dimensional drawing for mounting
hole details.

575
26 Ø

Ø Ø

60-M4

48

26

Ø

Ø 6-M4
Ø

Ø

Ø

95

530

575

6Z2L0W(wKiSthDpQaHnOel)

140 235

B A

Ø Ø
364

MODEL (KW)
kW5.6 5.6<kW6.3

A: CONNECT TO REFRIGERANT PIPING (LIQUID SIDE) Ø6.35 Ø9.52

B: CONNECT TO REFRIGERANT PIPING (GAS SIDE) Ø12.7 Ø15.9

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06. ACCESSORIES
List of accessories Installation & Owner’s Manual X 1 Indoor Unit Installation Instructions (Make sure to hand it over to the user)

Brass nut X 2 For use in the installation of connecting pipe (the quantity is one for models with a process pipe)

Cable tie X 4

Thermal insulation pipe X 2

To tighten the drainage hose Used for insulation and

tightly to the drainage outlet anti-condensation at pipe

and PVC piping of the Indoor connections.

Unit.

CAUTION When installing the insulation pipe on site, please cut it according to the actual needs. (Either method (a) or (b) is OK. Method (c) is incorrect. There must be no gap between the insulation pipe and the copper pipe.)
Not Connected

(a)

(b)

(c)

Clearance

NOTE
· Check the accessory kit for the above items and contact your local dealer for any missing items. · Do not throw away any accessories that may be required for installation until the installation is complete. · Customers may choose to buy wired controllers, remote controllers (with seven-speed wind control) and other
optional accessories.

06.01. Accessories available to be purchased separately

List of accessories

Copper pipe Used to connect the indoor refrigerant piping.

PVC water discharge pipe Used to drain the condensed water from the Indoor Unit.

Thermal insulation pipe Used to prevent pipe condensation.

Expansion screw (M10)X4 Used to install the Indoor Unit.

Lifting screw (M10)X4 Used to install the Indoor Unit.

Copper pipe specification(Unit: mm)

Model (kW)

Piping Liquid side

Gas side

kW5.6

Ø6.35×0.75

Ø12.7×0.75

5.6<kW6.3

Ø9.52×0.75

Ø15.9×1.0

Remarks

For connection of the Indoor Unit refrigerant system, it is recommended to use a soft copper tube (T2M), with the length selected according to the actual situation.

PVC water discharge pipe

Thermal insulation pipe

This is used as the Indoor Unit’s drainage pipe, 25mm in external diameter. The length is determined according to actual needs.

The thickness of the insulation pipe for the copper pipe is usually 15mm or above; and the thickness of the insulation pipe for the rigid polyethylene plastic tube is usually 10mm or above. If the pipe is used in a closed humid area, the thickness should be increased.

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CAUTION
Materials, including copper pipes, drainage pipes, lifting screws, various fasteners (such as pipe supports, clamps, screws), power cables, and signal cables, to be used for field installation need to be purchased on site by the installation operator. Materials and specifications must comply with relevant national or industry standards.

06.02. Heat Insulation Material Requirements

1

Use the closed-cell foam insulation material, which is rated at a flame retardancy level of B1 and heat resistance of over 120°C.

Thickness of the insulation pipe: 2 1. When the diameter is equal to or greater than 15.9mm, the insulation thickness is at least 20mm.
2. When the diameter is equal to or smaller than 12.7mm, the insulation thickness is at least 15mm.

Copper pipe insulation

For insulation of the outdoor copper pipe, the wall thickness of insulation pipes for winter heating systems is 3 generally increased to over 40mm in regions with severe cold. For insulation of the indoor gas pipe, the wall
thickness of insulation pipes is usually greater than 20mm.

4

Use glue to connect the joints and cuts of the thermal insulation pipe, and then wrap them with electrical tape with a width of not less than 50mm to ensure the connection is firm.

5

The insulation between the copper pipe and the Indoor Unit should be tight to prevent the generation of condensed water.

6

After the system leakage detection test indicates that there are no leaks, carry out the insulation of the copper pipe.

1

Indoor parts of the drainage pipe shall be insulated to prevent condensation, and protective sleeves should be thicker than 10mm.

Drainage pipe insulation

2 If the pipe is not wholly insulated, be sure to rebind the cut part.

3

Use glue or buckles to connect the joints and cuts of the thermal insulation pipe, and make sure it is at the top of the pipe.

4 After the drainage test shows that there are no leaks, carry out the insulation of the water distribution pipe.

CAUTION The materials and specifications of insulation materials must meet national or industry standards.

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07. PREPARATIONS BEFORE INSTALLATION
07.01. Unpacking Check
1. Before installation, check whether the packing materials are in good condition, whether the accessories that come with the product are complete, whether the air conditioner is intact, and whether the surfaces of the heat exchanger and other parts are worn.
2. Check the sealing nut of the refrigerant pipe, and observe whether the red dot on the surface of the sealing nut of the gas pipe bulges. If it bulges, the pipe is well-sealed; if it retracts, the line is leaking, and you need to contact your local dealer. The red dot bulges
Sealing

The red dot retracts
Air leakage

3. Check the machine model before installation. 4. After Indoor Unit and Outdoor Unit inspection, pack them with plastic bags to avoid intake of foreign matters.

07.02. Indoor Unit Positioning
Determine the positions of the air conditioning unit and lifting screws

1. Determine the lifting position of the Indoor Unit according to the design drawing.

2. Draw lines to locate the drilling positions of the suspender bolts according to the mounting cardboard.

3. Make an access hole on the electric control box side (recommended size: 450×450mm).

4. There shall be no obstacles within 200mm of the return air inlet.

5. It is suggested to use an infrared ray locator for line drawing.

TOP VIEW

Wall

SIDE VIEW

1000

450

1000 Maintenance space

450

Access hole Electric control box

Access hole

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07.03. Installation Preparations

07.03.01. Determine the positions of the ceiling opening, the unit and the lifting screws.
1. Cut a hole with a size of 590mm x 590mm according to the outline of the mounting cardboard.

4-Ø12

(Unit: mm)
Shape cutting of the mounting cardboard

378±1

210

378±1

530±1 (suspender distance)

590 (ceiling opening dimension) 575±1 (Indoor

210

530±1 (suspender distance) 575±1 (Indoor
590 (ceiling opening dimension)

Ø20 (middle opening Ø12)

CAUTION Align the center of the ceiling box with that of the main body of the air conditioner.
2. Use the holes in the mounting cardboard to determine the positions of mounting holes 3. When installing the air conditioner on a new ceiling, affix cardboard to the main body of the installed air
conditioner as a reference to determine the size, location, and center of the ceiling box

CAUTION
· Evenly adjust the four hex nuts to make sure that the main body of the air conditioner is level.
· When the air conditioner is to be fixed onto the ceiling with a frame: The horizontal distance of the overlapping part of the ceiling and decoration panel must be more than 10mm. The distance between the Indoor Unit and the ceiling must be within 12mm. If the distance is greater than 15mm, retrofit the ceiling.

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07.03.02. If necessary, cut out the required openings for installation on the ceiling (where there is an existing ceiling).

Suspender installation
Hexagon nut (Level adjustment)

(Unit: mm)

Connect to drainage pipe Connect to refrigerant piping (liquid side) Connect to refrigerant piping (gas side)

43.5 135

Ceiling Panel

15 590X590 (ceiling opening dimension) >15
CAUTION · Before connecting the Indoor Unit piping and wiring, connect the refrigerant piping, drainage pipe, remote
control wire (not required when using a wireless remote controller), and the connection wire, power cable, and ground wire between the Indoor Unit and Outdoor Unit (please refer to piping and wiring instructions) so that it can be connected to the Indoor Unit immediately after installation. · To cut ceiling holes, the ceiling bracket may be reinforced to keep the ceiling flat and prevent the ceiling from vibrating. For details, please consult the builder.

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INDOOR UNIT INSTALLATION

CAUTION · Install the air conditioner in a location with sufficient strength to support the weight of the unit. Take
reinforcement measures when necessary. · The unit may fall and cause personal injury if the location is not strong enough. · Unstable installation may cause the unit to fall and cause an accident. · Before wiring/pipe layout, make sure that the installation area (walls and floor) is safe and free of water,
power, gas, and other hidden dangers.
08.01. Installation of Lifting Bolts

CAUTION · High-quality carbon steel bolts (galvanized or with other anti-rust paint applied) or stainless steel bolts are
used. · How the ceiling is treated will differ with the type of building. For specific measures, please consult the
building and renovation engineers. · How the lifting bolt is secured varies according to the specific situation, and it must be secure and reliable.

Refer to the following table on installation using the lifting bolts.

Sites with concrete slabs Use embedded bolts and pull bolts.

Sites with steel frame Directly set and use an angle iron for support.

Lifting bolts

Angle iron for support

08.02. Indoor Unit Installation
CAUTION When installing the Indoor Unit, make the side of the electric control box obliquely enter the ceiling (as shown in the figure below) to avoid accidental damage to the ceiling by the electric control box during installation.
Electric control box
In-

Access hole Ceiling hole

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08.02.01. Existing ceiling (the ceiling surface needs to be level)
1. Cut a 590mm × 590mm square hole on the ceiling according to the shape of the mounting cardboard (see the figure below).
a. The center of the ceiling opening is the same as the center of the main body of the air conditioner.
b. Determine the lengths and outlets of connecting pipe, drainage pipe, and electrical wiring.
c. To keep the ceiling surface level and prevent vibration, strengthen the ceiling rigidity if necessary.

590mm

590mm

Ceiling In-

Piping Drainage pipe Central positioning hole of the ceiling opening

2. Confirm the installation hook position according to the installation hook holes located in the four corners of the mounting cardboard.
a. Drill four holes with a diameter of Ø12mm and a depth of 50­55mm on the roof according to the specified position, and then embed expansion hooks.
b. During installation, face the concave surface of the mounting hook towards the expansion hook, determine the appropriate length of the mounting hook according to the ceiling height, and cut off the excess part.
c. M10 or W3/8 bolts should be used to install the hook screw.
d. Generally, the remaining length is about 1/2 of the thread length of the mounting hook.

TOP

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3. Use the hex nuts on the four mounting hooks to adjust evenly and make sure the main body is level.

a. If the water discharge pipe is slanted, it may cause the water level switch to malfunction, and water may leak.
Main body of air conditioner

b. Adjust the position of the main body to ensure that the interval of the four sides of the ceiling is even, and the bottom surface of the main body should be recessed from the bottom surface of the ceiling by 10-12mm.

Main body of air conditioner

10-12mm

Ceiling

7.5mm

c. After adjusting the main body position and level, tighten the nuts on the mounting hook to secure the air conditioner in place.

Tighten the upper and lower nuts

4. For units with fresh air functions, before installing Indoor Units: a. Use diagonal pliers to remove the knockout at the fresh air unit at one side of the unit in advance. Install a fresh air flange at the fresh air unit and secure it with the flange connecting screws. b. Use a knife to the fresh air blockage of the drain pan foam.
Fresh air flange

Flange connecting screws (6 pcs)
CAUTION · When connecting the fresh air unit, insulate the fresh air pipe with foam insulation materials that are
at least 10mm thick. · The temperature difference between the fresh air provided by the fresh air unit to the Indoor
Unit and the indoor temperature shall not exceed 5°C, otherwise there is a risk of condensation in the return air area of the air conditioner. Please use a fresh air unit equipped with a temperature regulation function Or cover the enclosure of the fresh air outlet of the air conditioner with foam insulation material with a thickness of at least 10mm. The area and thickness of the insulation material should be adjusted depending on the actual situation.

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5. For models with expansion units, use diagonal pliers to remove the knockouts at the expansion units at two sides of the unit in advance before installing Indoor Units. Install expansion flanges at the expansion unit and secure them with the flange connecting screws.

Expansion unit knockouts (two)

Expansion flanges (two)

Flange connecting screws (12)
08.02.02. New rooms and new ceilings
1. For the installation of lifting bolts, a hook can be embedded in the new room. Make sure the hook can withstand 4 times the weight of the Indoor Unit and will not loosen due to shrinkage of the concrete.
2. After the main body is lifted, fix the mounting cardboard on the air conditioner unit with M5×20 screws (panel) to predetermine the size and position of the ceiling opening.
a. Make sure the ceiling is level when installing the ceiling.
b. Carry out installation as described above for the remaining parts (Point 1 of Existing Ceiling installation). Main body of air conditioner

M6×20 screw (Panel)

Mounting cardboard

3. Carry out installation as described above (Point 3 of Existing Ceiling installation).
4. Remove the mounting cardboard.
NOTE · Make sure the Indoor Unit unit is level: Use a spirit level or a transparent rubber hose filled with water to
correct the level of the Indoor Unit, otherwise water leakage may occur. · The Indoor Unit is equipped with a built-in drain pump and a water level switch. Do not tilt the unit in the
opposite direction of the condensate water flow; otherwise, the water level switch will fail and cause water leakage.

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08.03. Panel Installation

CAUTION When installing the panel, avoid placing the display panel directly under the inlet/outlet pipelines.

08.03.01. Remove the air inlet grille

Press the two grille clamps at the same time to lift the grille.

Air inlet grille

Auxiliary buckle Display panel (inner)

Grille clamp

Louver Decoration panel

NOTE · Do not position the panel so that it faces downwards or leans against the wall. Do not place it on a
protruding object either. · Do not hit or squeeze the louver.
08.03.02. Install the panel
1. Install the panel on the Indoor Unit using bolts (M5×20) and washers.
Drain side

Bolts and washers

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2. Make sure the two hooks are well secured.

ECOFLEX MINI VRF R32 SERIES

Panel hook (two)
3. Tighten the screws under the panel hooks until the thickness of the sealing sponges 1 and 2 between the Indoor Unit and the panel outlet is reduced to about 4-6mm. The edge of the panel should be in good contact with the ceiling.
Air Inlet In-
Sealing sponge 3 Sealing sponge 2

Panel

Foam 1 Louver

Ceiling Sealing sponge 1 Foam 2
Air Outlet

CAUTION · Improper screw tightening may cause the failure shown in the figure below. · After tightening the screws, if there is still a gap between the ceiling and the panel, the height of the
Indoor Unit must be readjusted. · If the lift level of the Indoor Unit and the drainage pipes are not affected, you can remove the panel and
readjust the height of the Indoor Unit.

(1) Loosen the upper nut

Air leakage Ceiling

Pollution

Droplets of condensed water, dripping water.

Ceiling

No gap allowed

(2) Adjust the lower nut

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08.03.03. Install the suction grille
1. Refer to the wiring nameplate located on the cover of the unit’s electric control box, and connect the exposed wires of the panel to the corresponding interface of the unit’s electric control.
2. A safety hang rope is reserved for the suction grille. Please install the hanging rope into the hang rope slot.

3. Install the suction grille back into the corresponding position, and push it up slightly at the grille clamp position to ensure that the grille buckle is fully engaged in the slot of the panel, and the grille is in the closed position.

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09. REFRIGERANT CONNECTING PIPING INSTALLATION
09.01. Length and Level Difference Requirements for the Pipe Connections of Indoor Unit and Outdoor Unit.
Different Outdoor Units have different requirements for length and level differences for the piping. Refer to the Installation & Owner’s Manual attached with the Outdoor Unit.

WARNING
· During the installation of the connecting pipes, do not allow air, dust, and other debris to penetrate the piping system, and make sure the interior of the pipes is dry.
· Install the connecting pipes only when the Indoor Units and Outdoor Units are secured.
· When installing the connecting pipes, record the actual installation length of the liquid pipe on the spot so that additional refrigerant can be added.
· The copper pipes must be wrapped with thermal insulation materials when they are installed. In the event of refrigerant gas leakage during operation, please ventilate immediately.
09.02. Pipe Layout
1. Bend the pipes or punch holes in the wall as needed. The deformed pipe area must not exceed 15% of the total area. A protective casing should be installed at the wall or floor hole. The weld joint must not be inside the casing. The drill hole on the external wall must be sealed and tightly wrapped with a binding tie to prevent impurities from entering the pipe. The pipe must be insulated with the correctly-sized insulation pipe.

Pipe insulation Pipe bending

D1

D1 D2

85%

D2

NOTE D1 is the minimum diameter, and D2 is the nominal diameter.
2. The wrapped connecting pipe is plugged through the wall hole sleeve from the outdoor side and enters the indoor side. The pipes must be arranged carefully so as not to damage the piping.
Sleeve

Wrapped pipe mouth

Outdoors

Connecting pipe Insulation casing
Indoors

Recommended through-wall direction

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09.03. Pipe Connection Steps
Measure the required length of the connecting pipe. Make the connecting pipe using the following method (see “Pipe Connection” for details).
1. Connect the Indoor Unit first, then connect the Outdoor Unit. Before tightening the flare nut, apply refrigeration oil on the inner and outer surface of the pipe flare (you must use refrigeration oil compatible with the refrigerant for this model), and turn it 3 or 4 turns by hand to tighten it.When connecting or removing a pipe, use two wrenches at the same time.

Brass nut

Apply refrigerant oil to the outer surface of theeppipiepe socket

n

CAUTION

Do not let the interface of the Indoor Unit bear

the weight of the connecting pipe; otherwise,

ü Bend and arrange pipes carefully without damaging the pipes and their insulating layers.

û

the connecting pipe may be crushed and deformed, which will affect the unit’s cooling

(heating) abilities, or the thermal insulation

materials may become compressed, resulting in

air leakage and condensation.

2. The check valve of the Outdoor Unit is completely closed when leaving the factory. Unscrew brass nuts from the check valve in each connection, and connect the flared tube within 5 minutes. When the brass nuts at the check valve are removed and placed somewhere for too long, dust and other sundries may enter the pipeline system and cause failures after extended periods of operation.

3. After the refrigerant piping is connected to the Indoor Unit and Outdoor Unit, follow the operations in the section titled “Vacuum pumping” to exhaust the air. After the air is exhausted, tighten the maintenance nut.

09.04. Pipe Connection
Bend the pipe with your thumb
nnection

Processing method
1. Hand bending processing: Applicable to thin copper pipes (Ø6.35mm­Ø12.7mm).
2. Mechanical bending processing: Wider application (Ø6.35mm­Ø28mm), using spring pipe bender, manual pipe bender or electric pipe bender.

CAUTION

· The bending angle should not exceed 90°; otherwise, wrinkles will be formed in the pipe, which can easily break.

· The bending radius should not be smaller than 3.5D (pipe diameter) and should be as large as possible to prevent the

pipe from becoming flattened or crushed.

n

· When mechanically bending the pipe, the pipe bender inserted into the copper pipe must be cleaned.

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09.04.01. Nitrogen displacement
When brazing pipes, fill the pipes with nitrogen. First evenly heat the inner pipes, then the outer pipes, and fill the joints with welding material.

WARNING · When it is necessary to fill the piping with nitrogen during welding, the pressure must be kept at 0.02MPa
using a pressure relief valve. · Do not use flux when soldering the refrigerant connection piping. Use a phosphor copper solder that does
not require flux. · Do not use any antioxidants when soldering the piping. The piping may become clogged with residual
antioxidants, which may block components such as electronic expansion valves during operation.
Pressure relief valve

Refrigerant piping

Welding position

Nitrogen connection
Nitrogen

NITROGEN

Manual valve

09.04.02. Flaring
To cut the piping with a pipe cutter, rotate the pipe cutter repeatedly.

Put the pipe into the connecting nut flaring, and both the gas pipe and liquid pipe of the Indoor Unit are connected by flaring.

90°±4
45°±2 A

üû ûû
90° Rough Slope Burrs

R0.4­0.8

Pipe cutter

Outer diameter (mm)
Ø6.35 Ø9.52 Ø12.7 Ø15.9 Ø19.1

A (mm)

Max.

Min.

8.7

8.3

12.4

12.0

15.8

15.4

19.1

18.6

23.3

22.9

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09.04.03. Nut fastening
1. Align the connecting piping, firstly tighten most of the thread of the connecting nut by hand, and then use a wrench to tighten the last 1-2 turns of the thread as shown in the figure.
2. The welding is done on site, and the bell mouth cannot be used indoors.(For IEC/EN 60335-2-40 except IEC 60335-2-40: 2018)
3. The protective nut is a one-time part, it can not be reused. In case it is removed, it should be replaced with a new one.(For IEC 60335-2-40: 2018 only) Handle
Bar
Bar Yoke

“A”

Copper pipe

Cone

Clamp handle

Red arrow mark

Protective nut

Indoor unit tubing

Flare nut Pipings

CAUTION · Excessive torque can break nut on installation conditions. · When flared joints are reused indoors,the flare part should be re-fabricated.

Pipe size (mm) Ø6.35 Ø9.52 Ø12.7 Ø15.9 Ø19.1

Tightening torque [ N.m (kgf.cm)] 14.2­17.2 (144­176) 32.7­39.9 (333­407) 49.5­60.3 (504­616) 61.8­75.4 (630­770)
97.2­118.6 (990­1210)

CAUTION
Depending on the installation conditions, excessive torque will damage the flared mouth, and too small torque cannot tighten the nut, which will cause refrigerant leakage. Please refer to the above table to determine the appropriate tightening torque.

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09.05. Refrigerant Piping Fixing
Angle iron brackets or round steel hangers should be used for fixing. When the liquid pipe and gas pipe are suspended together, the size of the liquid pipe shall prevail.

Pipe outer diameter (mm) Horizontal pipe distance (m) Stand pipe distance (m)

20

20~40

40

1.0

1.5

2.0

1.5

2.0

2.5

09.06. Vacuum Pumping
Connect the refrigerant piping to the gas and liquid pipes of the Outdoor Unit, and use a vacuum pump to evacuate the gas and liquid pipes of the Outdoor Unit at the same time.

Indoor Unit

Outdoor Unit

Check valve

û

Do not use the refrigerant enclosed in the Outdoor Unit for vacuuming. The reduction of Outdoor Unit refrigerant may cause performance degradation of the air conditioner.

High pressure gauge Pump valve

Low pressure gauge Vacuum pump

09.07. Leak Detection
Fill the system with nitrogen and increase its pressure to detect leaks. The following methods are recommended:
1. By foam
Apply soapy water or foam evenly (spray) on areas where leakage may occur, and observe whether air bubbles appear. If there are no air bubbles, it indicates that the system is airtight.
2. By instrument
Use a refrigerant leak detector to identify leaks. Align the leak detector probe with the part where leakage may occur, and follow the instructions to determine whether there is a leak.

CAUTION
Leak detection will be conducted at each spot for at least 3 minutes. If any leak has been identified, tighten the nut and perform the detection again until no leaks are found. After completing the leak detection, wrap the exposed Indoor Unit pipe joint with insulation material and tie it with a binding tie to prevent condensation and dripping water.

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09.08. Heat Insulation Treatment
Pipes on the liquid and air sides have a low temperature during cooling. Take sufficient insulation measures to prevent condensation.

Unit body Auxiliary heat
insulation pump
belt

Onsite piping side

NOTE · Be sure to use a thermal insulation material with a heat resistance of 120°C or higher for the gas pipe.
· The attached insulation material for the part of the Indoor Unit where the pipe connects must undergo heat insulation treatment that leaves no gaps.
· For outdoor pipelines, additional protective treatments should be performed, such as adding metal duct boxes or wrapping the pipes with aluminum foil materials. Thermal insulation materials directly exposed to the open air will degrade and lose their insulating properties

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10. DRAINAGE PIPE INSTALLATION

CAUTION · Before installation of the condensate pipeline, determine its direction and elevation to avoid intersection with other
pipelines to ensure that the slope is smooth and straight.
· The highest point of the drainage pipe should be equipped with a discharge port to ensure the smooth discharge of condensate water, and the discharge port must face downwards to prevent dirt from entering the pipe.
· Do not connect the drainage pipe to the wastewater pipe, sewage pipe, or other pipes that produce corrosive gases or odors. Otherwise, the Indoor Unit (especially the heat exchanger) may be corroded and odor may enter the room, negatively impacting the heat exchange effects and user experience. The user will assume responsibility for any consequences resulting from failure to abide by instructions.
· After the pipeline connection is completed, a water test and a full water test should be done to check whether the drainage is smooth and whether the pipeline system leaks.
· The air conditioner drainage pipe must be installed separately from other sewage pipes, rainwater pipes and drainage pipes in the building.
· Adverse slope, convex and concave pipes are prohibited, as improper airflow will cause poor drainage. Drainage pipes need to be evenly wrapped with thermal insulation pipes to prevent condensation.
· Please connect the drainage pipes in the following ways. Improper installation of the pipes may result in water leakage and damage to furniture and property.
· All joints of the drainage system must be sealed to prevent water leakage.

10.01. Installation of Water Discharge Pipe for the Indoor Unit

1. The drainage pipe can be connected to the water pump outlet by using a PVC pipe, and fastening it with a cable tie. Then push the thermal insulation pipe to be closely attached to the main body, and finally fasten the end with a cable tie.

The connection between the two ends of the drainage hosepipes and the connection of the water pump outlet need to be fastened with a cable tie, in combination with PVC/rubber adhesives. Pay attention to the instructions for use of the adhesives to prevent corrosion to the EPDM rubber. Use hard PVC adhesives for connecting to other water piping. Check that the connections are tight and without leakage.

IDU Drainage outlet for water pump Cable tie

PVC water discharge pipe (outer diameter: 25mm)
Thermal insulation pipe Drainage outlet for water pump

90° Rough Slope Burrs Scratches
Orifice of the PVC water discharge pipe should be flat and smooth
PVC drainage pipe (outer diameter: 25mm) and insulation pipe (During on-site installation, the insulation pipe should be about 50mm longer than the PVC water discharge pipe, so as to ensure that there is enough casing at the ends for insulation)

Cable tie

The thermal insulation pipe is closely attached to the unit body.
There is a large gap between the thermal insulation pipe and the unit body, resulting in thermal insulation failure.

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2. The drainage pipes of the unit (especially the indoor part) must be evenly wrapped with thermal insulation pipes and fastened with cable ties to prevent air from entering and producing condensate water.
Cable tie

Drainage pipe Thermal insulation pipe

3. To prevent water from flowing back into the air conditioner when it stops running, the drainage pipe should be inclined downward to the outdoor side (drainage side), with a downward slope of 1/100 or more. The drainage pipe should be positioned in the same direction as the drainage outlet of the unit body in a left and right direction, so that the drainage pipe does not expand and collect water; otherwise, it may cause abnormal noise.
Direction

Slope of 1/100

Direction

Consistent with the direction of water outlet

4. When connecting the drainage pipe, do not pull the drainage pipe forcefully, or it may become loose. The lateral pullout of the drainage pipe should be within 20m, and a support point should be set every 0.8­1.0m to avoid air resistance caused by the deflection of the drainage pipe. The drainage pipe shall be equipped with a support point every 1.5-2.0m.

Air outlet
Drainage pipe

0.8-1.0m Within 20m

Slope of 1/100 or more

5. The end of the drainage pipe must be more than 50mm above the ground or from the base of the water discharge slot. In addition, do not submerge it in water. To discharge the condensed water directly into a ditch, the water discharge pipe must bend upwards to form a U-shaped water plug to stop odors from entering the room via the water discharge pipe.
Drainage pipe

Ground

50mm

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Connection method of the drainage pipe:

ECOFLEX MINI VRF R32 SERIES

Air outlet

(Unit: mm)

200

Slope > 1/100

800~1000

The net height of the drainage pipe 1200

Method to connect the drainage pipe for a single unit

Air outlet

200 50~100
Water outlet connection pipe parts

200 50~100 The net height of the drainage pipe 1200
Main water outlet pipe Slope > 1/100

Drainage pipes from multiple units are connected to the main drainage pipe to be discharged through the sewage pipe.
Hedging must be prevented for horizontal drainage pipes to avoid adverse slopes and poor drainage.

Drainage pipe

Drainage pipe

Drainage pipe

Three-way drainage

Three-way drainage

Three-way drainage

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10.02. Water Discharge Test
1. Before the test, make sure that the water discharge pipeline is smooth, and check that each connection is properly sealed.
2. Conduct the water discharge test in a new room before the ceiling is plastered.
· The drainage pipe can be made of PVC pipe (outer diameter: 25mm). Based on the actual installation circumstances, users can purchase pipes of appropriate lengths from a sales agent or the local after-sales service center, or purchase them directly from the market.
· Connect the power supply, and set the air conditioner to operate in cooling mode. Check the operating sound of the drain pump, and check whether the drainage outlet is draining normally (depending on the length of the drainage pipe, it may be delayed for about 1 minute before draining), and whether there is water leakage at each joint.
· If water drainage is carried out using the Indoor Unit drain pump, you need to remove the drainage plug on the unit body when conducting the water discharge test, to check whether the drain pump is operating. If the drain pump has not been started, check whether the drain pump has malfunctioned. Note: The drain pump only starts in cooling mode. While in heating mode, the drain pump remains turned off.
· After the water discharge test is completed, turn off the power, remove the accumulated water, and replace the drainage plug. Drainage pipe joint IDU

Drain pan

Water injection pipe
Drainage plug

CAUTION · The drainage plug at the bottom of the Indoor Unit is used to remove the accumulated water in the drain pan when
the air conditioner is faulty and being repaired. The drainage plug should be inserted during operation to prevent water leakage.
· Faults, if any, need to be rectified as soon as possible.

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11. ELECTRICAL CONNECTION

DANGER · The power supply must be cut off before any electrical work is carried out. Do not conduct electrical work when the
power is on; otherwise, it may cause serious personal injury. · The air conditioning unit must be grounded reliably and must meet the requirements of the local country/region. If
the grounding is not reliable, serious personal injury due to electric leakage may occur.
WARNING · Installation, inspection or maintenance operations must be completed by professional technicians. All parts and
materials must comply with the relevant regulations of the local country/region. · The air conditioning unit must be equipped with a special power supply, and the power supply voltage should conform
to the nominal working voltage range of the air conditioning unit. · The power supply of the air conditioning unit must be equipped with a power disconnect device that conforms to the
requirements of relevant local technical standards for electrical equipment. The power disconnecting device must be equipped with short circuit protection, overload protection and electric leakage protection. The clearance between open contacts of the power disconnecting device shall be at least 3mm. · The core of the power cable must be made of copper, and the wire diameter should meet the current-carrying requirements. For details, refer to the “Power Cable Diameter and Electric Leakage Protector Selection”. A wire diameter that is too small may cause the power cable to heat up, resulting in a fire. · The power cable and the ground wire should be secured reliably to avoid stress on the terminals. Do not pull the power cable forcibly; otherwise, the wiring may become loosened or the terminal blocks may be damaged. · Strong current wires such as power cables cannot be connected to weak current wires such as communication lines; otherwise, the product may become seriously damaged. · Do not bond and connect the power cable. Bonding and connecting the power cable may cause it to heat up, resulting in a fire.

CAUTION · Bonding and connecting the communication line should be avoided, but if it is used, at the very least, ensure a reliable
connection by crimping or soldering and make sure the copper wire at the connection is not exposed; otherwise, communication failure may occur.
· The power cable and communication line must be routed separately, with a distance of over 5 cm. Otherwise, communication failure may occur.
· Keep the vicinity of the air conditioning unit as clean as possible to avoid small animals from nesting and biting the cables. If a small animal touches or bites the cables, short circuiting or electric leakage may occur.
· Do not connect the ground wire to the gas pipe, water pipe, lightning rod ground wire or telephone ground wire. Gas pipe: Risk of explosion and fire when gas leaks.
· Water pipe: If rigid plastic pipes are used, there will be no grounding effect.
· Lightning rod ground wire or telephone ground wire: In the event of lightning strikes, abnormal ground potential may rise.
· After all wiring is completed, check carefully before turning on the power supply.

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11.01. Electrical Characteristics

Unit power (kW)
1.5 2.2 2.8 3.6 4.5 5.6 6.3

Frequency (Hz) 50

Electric specifications of the Indoor Unit

Voltage (V)

MCA (A)

MFA (A)

IFM power input (W)

0.46

45

0.46

45

0.54

45

216~253

0.54

16

45

0.61

45

0.65

45

0.81

45

FLA (A)
0.37 0.37 0.43 0.43 0.49 0.52 0.65

NOTES · MCA: Min. Circuit Amps. (A), which is used to select the minimum circuit size to ensure safe operation over a long
period of time. · MFA: Max. Fuse Amps. (A), which is used to select the circuit breaker. · IFM power input: full load power input of the indoor fan motor (reliable operation at the fastest speed setting). · FLA: Full Load Amps. (A), which is the full load current of the indoor fan motor (reliable operation at the fastest speed
setting).

11.02. Schematic diagram of the main terminal blocks of main control board

CN1

CN22

L N Power cable and earth line terminals

3 21
Terminals Terminals of strong of alarm current signal sterilization output module

CN55
Terminals of remote switch signal

CN18
Terminals of function module adapter board

CAUTION

CN10

CN6

CN2

M1 M2 X1 X2 E P Q D1(X) D2(Y) Terminals of communication line

All weak point connection points meet SELV, such as X1, X2, P, Q, E, M1, M2, CN18, CN55 etc

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11.03. Wiring 11.03.01. Open the Indoor Unit’s electric control box cover

Screw (two)

1 2 1 3

1. Remove the two screws at the positions shown in the figure; 2. Pull the bottom end of the electric control box cover horizontally outward; 3. Remove the electric control box cover by pulling downwards.

11.03.02. Connect the current wires
Strong current inlet
Power cable

Weak current inlet Remote switch connection wire

CAUTION · The strong and weak current wires must be separated. · Alarm signal output, strong current sterilization, remote switch, and function expansion board are custom or optional.

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11.03.03. Power cable connection

11.03.03.01. Connection between the power cable and power supply terminal

The power supply terminal of the Indoor Unit is fixed to

the main control board, and the power cable is con-

Main control board

nected to the power supply terminal labeled “CN1” on

the main control board. The live and neutral wires are

connected according to the main control board logos

CN1

“L” and “N”, and the ground wire is directly connected to

the electric control box sheet metal part.

Electric

LN

control box

Power input

sheet metal part

CAUTION

A

Do not bond and connect the power cable. Bonding and connecting the power cable may cause it to heat up, resulting in a fire.

The power cable must be crimped reliably using an insulated circular terminal block, and then connected to the power supply terminal of the Indoor Unit, as shown in the figure below.
Insulation sleeve
B

If it fails to crimp the insulated circular terminal block

due to on-site limitations, connect the power cables

of the same diameter to both sides of the power sup-

ply terminal block of the Indoor Unit, as shown in the

figure below.

Connect wires

of the same

C

diameter on both sides.

Circular terminal block

Power cable

Do not press the power cables of the same wire diameter on the same side of the terminal. Do not use two power

cables of different wire diameters for the same terminal blocks; otherwise, they can easily loosen due to uneven

pressure and cause accidents, as shown in the figure below. Do not connDeoctnwoitrecsoonfnect wires of

Do not conDneocntowtirceosnonfect wires of

the same diatmheetsearme diameter

different diamthetsearms.e diameter

on the sameosnidteh.e same side.

on the same side.

D

The connected power cable should be secured with a E wire clamp to prevent loosening, as shown in the right
figure.

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11.03.03.02. Power cable system connection
Power cable system connection depends on the forms of communication between the Indoor Unit and Outdoor Unit. For the HyperLink communication form with an independent power supply, Indoor Units are allowed to have an independent power supply. For other communication forms, Indoor Units should be provided with uniform power supply.

A. Indoor Units are provided with independent power supplies*, which are wired as follows:

For HyperLink communication with an independent power supply:

MOaDstUer CN23
M1 M2

Communication wire Power cable

La

L1

Power supply for IDU

M1 M2 CN1
CN10 L N IDU 1#

×× Circuit breaker ··· IDU 2-9#

Lx

Power supply for IDU

M1 M2 CN1

××

Circuit breaker

CN10 L N IDU 10#

Ly

TO DOWN CN2

IDUM1

M2

CN3

M1 M2 TO UP IDU

HyperLink repeater 2

Lb

Power supply for IDU

M1 M2 CN1
CN10 L N IDU 20#

×× Circuit breaker ··· IDU 12-19#

TO DOWN CN2

IDUM1

M2

CN3

M1 M2 TO UP IDU

HyperLink repeater 1

L11

Power supply for IDU

M1 M2 CN1

××

Circuit breaker

CN10 L N IDU 11#

L21

Lc

Power supply for IDU

M1 M2 CN1
CN10 L N IDU 21#

×× Circuit breaker ··· IDU 22-28#

L30

Power supply for

Power supply for IDU

IDU

M1 M2 CN1

×× Circuit breaker M1 M2 CN1

××

Circuit breaker

CN10 L N IDU 29#

CN10 L N IDU 30#

CAUTION
· When the Indoor Units are provided with independent power supplies, the Indoor Units in the same refrigerant system should be ECOFLEX Indoor Units, and the communication between Indoor Units and Outdoor Unit adopts a HyperLink with an independent power supply.
· This connection method has the function of an independent power supply, so in the same refrigerant system, the number of Indoor Units must not exceed 30 sets, and a maximum of only two repeaters may be installed.
· One repeater shall be added for every 10 Indoor Units or a communication distance of 200m added.

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B. Indoor Units are provided with uniform power supply*, which are wired as follows:

1. HyperLink communication with the uniform power supply:

Power supply for IDU Circuit breaker ××

L1+La+Ln 2000m Wire diameter: 0.75mm2

Distribution box

Distribution box

Communication wire Power cable

Master ODU CN23
M1 M2

IDU 1# CN10

CN1

M1 M2 L N

L1
2. P/Q communication:
Power supply for IDU Circuit breaker ××

··· 2-(n-2)# IDU
La

Distribution box

Master ODU CN22
PQ

IDU 1# CN6

CN1

PQL N

L1

··· 2-(n-2)# IDU
La

IDU (n-1)#

CN10

CN1

M1 M2 L N

IDU n# CN10

CN1

M1 M2 L N

Ln

Distribution box

Communication wire Power cable

IDU (n-1)#

CN6

CN1

PQ L N

IDU n# CN6 R

Build-out resistor
CN1

P QL N

Ln

Use shielded cables and ground the shield layer.
3. P/Q/E communication:
Power supply for IDU Circuit breaker ××

Distribution box

Distribution box

Master ODU CN22
P QE

IDU 1# CN6

CN1

PQE L N

L1

··· 2-(n-2)# IDU
La

IDU (n-1)#

CN6

CN1

PQE

LN

Ln

Communication wire Power cable

IDU n# CN6 R
PQE

Build-out resistor
CN1
LN

Use shielded cables and ground the shield layer.

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CAUTION · When the Indoor Units are provided with a uniform power supply, if the Indoor Units in the same refrigerant
system are ECOFLEX Indoor Units, then Indoor Units and Outdoor Unit can communicate either via HyperLink with a uniform power supply, or via P/Q communication. If some of the Indoor Units in the same refrigerant system are non-ECOFLEX series, then Indoor Units and Outdoor Unit can only communicate via P/Q or P/Q/E communication. · Both P/Q communication and HyperLink communication (M1M2) are indoor and outdoor communication, and only one of them can be selected. Do not connect P/Q communication and HyperLink communication at the same time in the same system. Do not connect HyperLink communication to P/Q or D1D2 communication.
NOTE · ECOFLEX Indoor Units: with ECOFLEX printed on the packaging carton · Independent power supply: With separate circuit breakers, the power supply for each Indoor Unit can be
controlled independently. · Uniform power supply: All the Indoor Units in the system are controlled by one circuit breaker. · Repeater: power supply repeater, which is used to compensate for the pressure drop due to excessive length
of line or line resistance when the main control board of the Outdoor Unit provides an independent power supply for Indoor Units through the HyperLink communication line. It is only used in refrigerant systems where Indoor Units are provided with an independent power supply.
11.03.03.03. Wiring diagram of main power supply

WARNING The main power supply wiring needs to be added with protective wire conduit

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11.03.04. Communication line connection
11.03.04.01. Selection of communication method for Indoor Unit
Equipped with independently developed HyperLink (M1M2) communication, ECOFLEX series Indoor Units also preserve the previous RS-485 (PQE) communication method. They are compatible with non-ECOFLEX Indoor Units. Pay attention to the type of Indoor Unit you have purchased before connecting communication lines. Please refer to the following table to select an appropriate communication method.

Indoor Unit type

Optional communication method between
Indoor Units and Outdoor Unit

Remarks

Were all Indoor Units are ECOFLEX series
Were some of the Indoor Units are ECOFLEX series

HyperLink (M1M2) communication
RS-485 (PQ) communication
RS-485 (PQE) communication

1. Independent power supply for Indoor Units*. 2. Any topology connection of communication lines. 3. Two-core and non-polar communication for M1M2.
1. The Indoor Units need to be powered uniformly. 2. The communication cables must be connected in
serial. 3. Two-core and non-polar communication for PQ.
1. The Indoor Units need to be powered uniformly. 2. The communication cables must be connected in
serial. 3. PQE cables must be 3-core and PQ non-polar.

11.03.04.02. Table of selection of communication line diameter

Function

Indoor Unit and Outdoor Unit communication

One controller

to one Indoor

Unit

One-to-more

(Two

(centralized

controllers controller)

to one Communication

Indoor Unit)

Communication

HyperLink

HyperLink

P/Q

P/Q/E

Item

communication (Indoor Units are powered

communication (Indoor Units are powered

communication (Indoor Units are powered

communication (Indoor Units are powered

X1X2 communication

D1D2 communication

independently) uniformly)

uniformly)

uniformly)

Wire diameter

2 × 1.5mm2 Wire resistance 1.33/100m

2 × 0.75mm2

2 × 0.75mm2 3 × 0.75mm2 2 × 0.75mm2 2 × 0.75mm2 (shielded cable) (shielded cable) (shielded cable) (shielded cable)

Length

600m (add two repeaters)

2000m

1200m

1200m

200m

1200m

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CAUTION · Please select the communication line according to the requirements in the above reference table. Use
shielded cables for communication when strong magnetism or interference is present.
· On-site wiring must comply with the relevant regulations of the local country/region and must be completed by professionals.
· Do not connect the communication line when the power is on.
· Do not connect the power cable to the communication terminal; otherwise, the main control board may be damaged.
· The standard value of the screw torque of the communication line terminal is 0.5N·m. Insufficient torque may cause poor contact; excessive torque may damage the screws and power supply terminals.
· Both HyperLink communication and PQ communication are internal and external, so only one of the two can be selected. Do not connect both HyperLink communication line and PQ communication line to the same system, otherwise the Indoor Unit and Outdoor Unit cannot communicate normally.
· If some of the Indoor Units in the same refrigerant system are non-ECOFLEX series, only P/Q/E communication can be selected for the Indoor Unit and Outdoor Unit communication. The three-core shielded cable of 3×0.75mm2 is required to connect “P”, “Q”, and “E”.
· Do not bundle the communication line with the refrigerant pipeline, power cable, etc. When the power cable and the communication line are laid in parallel, a distance of more than 5cm should be maintained to prevent interference from the signal source.
· When the construction personnel of the Indoor Unit and Outdoor Unit are working separately, information communication and synchronization are required. Do not connect the Outdoor Unit to HyperLink and the Indoor Unit to PQ. Do not connect the Outdoor Unit to PQ and the Indoor Unit to HyperLink.
· Bonding and connecting the communication line should be avoided, but if it is used, at the very least, ensure a reliable connection by crimping or soldering and make sure the copper wire at the connection is not exposed; otherwise, communication failure may occur.
11.03.04.03. Indoor Unit and Outdoor Unit communication
a. HyperLink communication (with independent power supply)

Single unit: HyperLink communication is a new type of Indoor Unit and Outdoor Unit communication technology. When the Indoor Units are provided with independent power supplies, use 2×1.5mm2 communication cables. M1 and M2 ports are located at terminal block “CN10” of the main control board. There is no distinction between negative and positive electrodes. For details, see the following figure:

control board

CN10 M1M2

Connect to Outdoor Unit M1M2 (HyperLink)
CAUTION · Do not connect the HyperLink communication line to the PQ or D1D2 communication line. · System: The HyperLink communication line with an independent power supply between the Indoor
Unit and Outdoor Unit can reach up to 600 meters, supporting any connection topology.

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The following figure shows a serial connection:

Master ODU CN23

M1 M2

La

L1

Power supply for IDU

M1 M2 CN1 CN10 L N

×× Circuit breaker
··· IDU 2­9#

IDU 1#

Power cable Communication wire

Lx

Power supply for IDU

M1 M2 CN1

×× Circuit breaker

CN10 IDU 10#

LN

TO DOWN IDU

CN2

M1 M2

M1 M2

CN3 TO UP IDU

HyperLink repeater 1

Ly

TO DOWN IDU

CN2

M1 M2

CN3

M1 M2 TO UP IDU

HyperLink repeater 2

Lb

Power supply for IDU

M1 M2 CN1 CN10 L N

×× Circuit breaker

··· IDU 12-19#

IDU 20#

L21

Lc

Power supply for IDU

M1 M2 CN1 CN10 L N

×× Circuit breaker
··· IDU 22­28#

IDU 21#

L30

Power supply for IDU

M1 M2 CN1

×× Circuit breaker

CN10 IDU 29#

LN

L11

Power supply for IDU

M1 M2 CN1

××

Circuit breaker

CN10 IDU 11#

LN

Power supply for IDU

M1 M2 CN1

×× Circuit breaker

CN10 IDU 30#

LN

CAUTION · If the total distance is 200m and the total number of Indoor Units is 10 sets, the valve is powered
and controlled by
· the master Outdoor Unit.
· If the total distance is longer than 200m or the total number of Indoor Units is more than 10 sets, a repeater is required to increase the bus voltage.
· The load capacity of the repeater is the same as that of the Outdoor Unit, and it can load a bus length of 200m or 10 Indoor Units. The number of Indoor Units requiring power supply in the same refrigerant system does not exceed 30 sets.
· A maximum of two repeaters can be installed in the same refrigerant system.
· Keep the power on/off for both the repeater and the Outdoor Unit, or use an uninterruptible power supply.
· For repeater installation, refer to the repeater installation manual. Do not connect the upstream and downstream Indoor Unit ports of the repeater in reverse; otherwise, it will cause a communication failure.
· The repeater is optional. If you need to purchase it, please contact your local dealer.

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b. HyperLink communication (with uniform power supply)
Single unit: When the Indoor Units are provided with uniform power supply, it is not necessary for HyperLink communication line to provide an independent power supply for Indoor Units. In this case, use 2×0.75mm2 communication cables. M1 and M2 ports are located at terminal block “CN10” of the main control board. There is no distinction between negative and positive electrodes. For details, see the following figure:
Main control board
CN10
M1 M2

Connect to ODU M1M2 (HyperLink)

CAUTION · When HyperLink with a uniform power supply is available, a uniform power supply for Indoor Units is
required. For details, see “Power Cable Connection”.
· When HyperLink with a uniform power supply is available, there is no need to connect a repeater to the system.

System: The HyperLink communication line with a uniform power supply between Indoor Unit and

Outdoor Unit can reach a length of up to 2000 meters, supporting any topology connection.

The following figure shows a serial

connection:

Power supply for IDU

Circuit breaker

Communication wire Power cable

Distribution box

Distribution box

CN23 M1 M2

IDU 1# CN10 CN1
M1 M2 L N

L1

··· 2-(n-2)# IDU

IDU (n-1)# CN10 CN1
M1 M2 L N

La

Ln

IDU n# CN10 CN1
M1 M2 L N

L1+La+Ln 2000m
For other connection methods (tree topology, star topology, ring topology), please refer to the technical manual or consult technical personnel

CAUTION Do not connect the HyperLink communication line to the PQ or D1D2 communication line.

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c. P/Q communication
Single unit: Use a shielded cable for the P/Q communication and properly ground the shield layer. P and Q ports are located at terminal block “CN6” of the main control board. There is no distinction between negative and positive electrodes. Connect the shield layer to the sheet metal of the electric control box, as shown in the following figure:
Main control board
CN6

PQ

Electric control box sheet metal part

Connect to the ODU PQ

System: The HyperLink communication line with a uniform power supply between Indoor Unit and

Outdoor Unit can reach a length of up to 2000 meters, supporting any topology connection.

The following figure shows a serial

connection:

Power supply for IDU

Circuit break×e×r

Communication wire Power cable

Distribution box

Distribution box

Master ODU
CN22
PQ

IDU 1# CN6 CN1
P QL N

L1

··· 2-(n-2)# IDU
La

IDU (n-1)# CN6 CN1
P QL N

IDU n#

Build-out resistor

CN6 R CN1

P QL N

Ln

L1+La+Ln 1200m

Use shielded cables and ground the shield layer.

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d. P/Q/E communication
If some of the Indoor Units in the same refrigerant system are non-ECOFLEX series, it is required to connect “P”, “Q”, and “E” for P/Q/E communication. Single unit: Use a shielded cable for the P/Q/E communication and properly ground the shield layer. P,
Q, and E ports are located at terminal block “CN6” of the main control board. There is no distinction between negative and positive electrodes. Connect the shield layer to the sheet metal of the electric control box, as shown in the following figure:
Main control board PQE

CN6

Electric control box sheet metal part Connect to the ODU PQE

System: The maximum total length of the P/Q/E communication cable of the Indoor Unit and

Outdoor Unit can be up to 1200m, and can be connected in serial, as shown in the figure

below:

Power supply for IDU

Circuit breaker ××

Power cable Communication wire

Distribution box

Distribution box

Master ODU
CN22
P QE

IDU 1# CN6 CN1 P QE L N
L1

··· 2-(n-2)# IDU
La

IDU (n-1)# CN6 CN1
P QE L N

IDU n# CN6 R
P QE

Build-out resistor CN1 LN

Ln

Use shielded cables and ground the shield layer.
L1+La+Ln 1200m
CAUTION · When P/Q or P/Q/E communication is used, the Indoor Units need to be powered uniformly. · Either P/Q, P/Q/E communication or HyperLink communication can be selected. If it is required for
Indoor Units to have independent power supplies, then HyperLink communication must be selected. · Use only shielded cables for P/Q or P/Q/E communication. Otherwise, the Indoor Unit and Outdoor
Unit communication may be affected. · A matching resistor needs to be added to the last Indoor Unit on the PQ (in the accessory bag of the
Outdoor Unit).

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11.03.04.04. X1/X2 communication cable connection
The X1X2 communication line is mainly connected to the wired controller to achieve one controller per Indoor Unit and two controllers per Indoor Unit. The total length of the X1X2 communication line can reach 200 meters. Please use shielded wires, but the shield layer cannot be grounded. X1 and X2 ports are located at terminal block “CN6” of the main control board. There is no distinction between negative and positive electrodes. For details, see the following figure:

Main control board X1 X2
CN6

Main control board X1 X2
CN6

L1

L2

One controller to one IDU

L3
Two controllers to one IDU (Master-slave wired controller needs to be set. For details, see the wired controller manual.)

CAUTION
Two wired controllers of the same model can be used to control one Indoor Unit at the same time. In this case, you need to set one controller to be the master and the other to be the slave. For details, see the wired controller manual.

11.03.04.05. D1D2 communication line connection (limited to Outdoor Unit and system configuration)
A. Achieving one-to-multiple and two-to-multiple functions of the Indoor Unit wired controller through D1D2 communication (a maximum of 16 sets)

D1D2 communication is 485 communication. The one-to-more and two-to-more functions of the Indoor Unit wired controller can be achieved through D1D2 communication, as shown in the figure below:

IDU 1#

IDU 2#

IDU 16#

X1 X2

D1 D2

CN2 CN6

D1 D2 CN2

··· IDU 3­15#

D1 D2 CN2

L3

Ln

L1

L2

Use shielded cables and ground the shield layer.

Please use shielded wires, and the shield layer cannot be grounded.

X1 X2 Wired controller

X1 X2 Wired controller

(master-slave wired controller needs to be set) The IDU can realize the one- to-more and two-to-more functions.

L1+L2 200m, L3+Ln 1200m

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CAUTION

· When the Indoor Units in the same refrigerant system are ECOFLEX Indoor Units, D1D2 communication can enable one-to-multiple and two-to-multiple functions of the Indoor Unit wired controller.

· To enable two-to-multiple functions, wired controllers must be of the same model.

B. Achieving centralized control of the Indoor Unit through D1D2 communication

The D1D2 communication line can also be connected to the centralized controller to achieve centralized

control of the Indoor Unit, as shown in the figure below:

IDU 1#

IDU 2#

IDU n#

D1 D2 CN2

D1 D2 CN2

··· 3-(n-1)# IDU

D1 D2 CN2

L3

Ln

L1

Use shielded cables and ground the shield layer.

XY Centralized controller

L1+L3+Ln 1200m
11.03.05. External board connection (limited to Outdoor Unit and system configuration)
The external board is a connection module outside the main control board, including a display panel, a function module adapter board, and 1# and 2# Expansion boards .
11.03.05.01. Display panel connection
The display panel is connected to the main control board through a 4-core cable, and is connected to the “CN30″ socket of the main control board, as shown in the following figure:

Display panel

CN30
Main control board

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11.03.05.02. Function module adapter board connection
Function expansion boards can communicate with the main control board through the adapter board. You can use one or both of the two function expansion boards. The wiring diagrams are as follows:

Use 1# Expansion board

Function CN1 module adapter board
CN2

CN18
Main control board

Use 2# Expansion board

Function CN1

CN18

module

adapter

board

CN2

Main control board

CN10

CN1

+12VGNDE1 E2

1# Expansion board

CN10

CN1

+12VGNDE1 E2

2# Expansion board

Use 1# and 2# Expansion board

Function CN1 module adapter board
CN2

CN18
Main control board

CN10

CN1

+12VGNDE1 E2

1# Expansion board

CN10

CN1

+12VGNDE1 E2

2# Expansion board

CAUTION
For the function introduction of the function module adapter board, function expansion board 1#, and function expansion board 2#, please refer to the function module manual.

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11.03.06. Reclose the electric control box cover
Straighten out the connecting wires and lay them flat, and close the electric control box cover again.

CAUTION · Do not cover the electric control box during power-on. · When covering the electric control box, arrange the cables carefully and do not clip the connecting wires on
the electric control box cover

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12. APPLICATION CONTROL

12.01. Error Codes and Definitions
In the following circumstances (warning failures excluded), please stop the air conditioner immediately, cut off the power switch and contact the local air conditioner customer service center. The error code is displayed on the display panel and the wired controller display.

Error code A01 A11 A51 A71 A72 A73 A74 A81 A82 A91 b11 b12 b13 b14 b34 b35 b36 b71 b72 b81 C11 C21 C41 C51 C52 C61 C71 C72 C73 C74 C75 C76

Error Emergency stop R-32 refrigerant leaks, requiring shutdown immediately Outdoor Unit fault The fault of the linked FAPU is transmitted to the master Indoor Unit (series setting) The fault of the linked humidifying Indoor Unit is transmitted to the master Indoor Unit The fault of the linked FAPU is transmitted to the master Indoor Unit (non-series setting) The fault of the AHU Kit slave unit is sent to the master unit Self-check fault MS (refrigerant flow direction switching device) fault Mode conflict (Non-ECOFLEX communication protocol adopted) 1# EEV coil fault 1# EEV body fault 2# EEV coil fault 2# EEV body fault Stall protection on 1# water pump Stall protection on 2# water pump Water level switch alarm Reheating electric heater fault Preprocessing electric heater fault Humidifier fault Duplicate Indoor Unit address code Abnormal communication between the Indoor Unit and Outdoor Unit Abnormal communication between the Indoor Unit main control board and fan drive board Abnormal communication between the Indoor Unit and wired controller Abnormal communication between the Indoor Unit and Wi-Fi Kit Abnormal communication between the Indoor Unit main control board and display board Abnormal communication between the AHU Kit slave unit and master unit Number of AHU Kits is not the same as the set number Abnormal communication between the linked humidifying Indoor Unit and master Indoor Unit Abnormal communication between the linked FAPU and master Indoor Unit (series setting) Abnormal communication between the linked FAPU and master Indoor Unit (non- series setting) Abnormal communication between the main wired controller and secondary wired controller

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Error code
C77
C78
C79 d16 d17 d81 dE1 dE2 dE3 dE4 dE5 E21 E22 E23 E24 E31 E32 E33 E61 E62 E81 EA1 EA2 EA3 EA4 EC1 F01 F11 F12 F21 P71 P72 U01 U11 U12 U14 U15

Error Abnormal communication between the Indoor Unit main control board and 1# function expansion board Abnormal communication between the Indoor Unit main control board and 2# function expansion board Abnormal communication between the Indoor Unit main control board and adapter board Air inlet temperature of the Indoor Unit is too low in heating mode Air inlet temperature of the Indoor Unit is too high in cooling mode Alarm for exceeding temperature and humidity range Sensor control board fault PM2.5 sensor fault CO2 sensor fault Formaldehyde sensor fault INTELLECTUAL EYE sensor fault T0 (fresh inlet air temperature sensor) short-circuits or cuts off The upper dry bulb temperature sensor short-circuits or cuts off The lower dry bulb temperature sensor short- circuits or cuts off T1 (Indoor Unit return air temperature sensor) short- circuits or cuts off The built-in room temperature sensor of the wired controller short-circuits or cuts off The wireless temperature sensor short- circuits or cuts off The external room temperature sensor short-circuits or cuts off Tcp (pre-cooled fresh air temperature sensor) short-circuits or cuts off Tph (pre-heated fresh air temperature sensor) short-circuits or cuts off TA (outlet air temperature sensor) short-circuits or cuts off Outlet air humidity sensor fault Return air humidity sensor fault Upper wet bulb sensor fault Lower wet bulb sensor fault R-32 refrigerant leakage sensor fault T2A (heat exchanger inlet temperature sensor) short-circuits or cuts off T2 (heat exchanger middle temperature sensor) short-circuits or cuts off T2 (heat exchanger middle temperature sensor) overtemperature protection T2B (heat exchanger outlet temperature sensor) short-circuits or cuts off Main control board EEPROM fault Indoor Unit display control board EEPROM fault Locked (electronic lock) Unit model code not set Horsepower code not set Horsepower code setting error AHU Kit fan control input signal DIP setting error

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Error code U38 J01 J1E J11 J3E J31 J43 J45 J47 J5E J52 J55 J6E

Error Address code not detected Motor failed more than once IPM (fan module) overcurrent protection Instantaneous overcurrent protection for phase current Low bus voltage fault High bus voltage fault Phase current sample bias error Motor and Indoor Unit are unmatched IPM and Indoor Unit are unmatched Motor startup failure Motor blocking protection Speed control mode setting error Phase lack protection of motor

12.02. Operating Status Codes and Definitions (Non-Error)

Code d0 dC dd dF d51 d61 d71

Definition Oil return or preheating operation Self-cleaning Mode conflict (ECOFLEX communication protocol adopted) Defrosting Static pressure detection Remote shutdown Indoor Unit backup operation

d72

Outdoor Unit backup operation

OTA

Main control program upgrading

CAUTION · Error codes are displayed only for certain Outdoor Unit models and Indoor Unit configurations (including the wired
controller and display panel).
· When the main control program is being upgraded, make sure that the Indoor Unit and Outdoor Unit remain powered on. Otherwise, the upgrading process will stop.

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12.03. Spot Check Description

Use the bi-directional communication wired controller (for example, MWC-B01CS ) to activate the spot check function in the following steps:

1. On the main page, hold ” ” and ” ” for 2s to enter the query page. The Outdoor Unit displays u00-u03, the Indoor Unit displays n00-n63 (the last two digits show the Indoor Unit address), and the wired controller displays CC. Press the ” ” or ” ” key to select the Indoor Unit, and press the
” ” key to enter the parameter query page. 2. Press the ” ” or ” ” key to query the parameters, and the
parameters can be queried cyclically. See the spot check list below for details.

Check No.
Spot check parameters

3. Press the ” ” key to exit the query function. 4. On the top of the query page, the “Timing area” displays the
spot check serial number, and the “Temperature area” displays the content of the spot check parameters.

Hold for 2s Selection BACK to enter the buttons button page

OK key

No.

Displayed content

No.

Displayed content

1

Indoor Unit and Outdoor Unit communication address (current Indoor Unit addresses are displayed every 0.5s)

13 Compressor discharge temperature

2 Capacity HP of Indoor Unit

14 Target overheating

3 Actual set temperature Ts

15 EEV opening (actual opening/8)

4 Current running set temperature Ts

16 Software version No.

5 Actual T1 indoor temperature

17 Display board version No.

6 Modified indoor temperature T1_modify

18 Fan drive version No.

7 T2 heat exchanger intermediate temperature

19 Historical error code (recent)

8 T2A heat exchanger liquid pipe temperature

20 Historical error code (sub-recent)

9 T2B heat exchanger gas pipe temperature

21 Indoor Unit network address display

10 Actual set humidity RHs

22 Indoor Unit expansion board address display

11 Actual RH indoor humidity

23 [] is displayed

12 Real-time static pressure

12.04. ESP Setting
Use the bi-directional communication wired controller (for example, WDC3-86S) to set the unit external static pressure, which can be divided into the following two situations:
12.04.01. Constant speed mode
The bi-directional communication wired controller must be used to set the unit external static pressure parameters to overcome the air outlet resistance. The steps are as follows:
1. On the main page, hold ” ” and ” ” for 3s. The Outdoor Unit displays u00-u03, while the Indoor Unit displays n00-n63 (the last two digits show the Indoor Unit address). The wired controller displays “CC”. Press the ” ” or ” ” key to select the Indoor Unit address, and press the ” ” key to enter the parameter setting page. The wired controller displays “n00”.

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2. On the parameter setting page, the wired controller displays “n00″. Press the ” ” key to enter the specific parameter setting, and then press ” ” and ” ” to adjust the parameter value of the unit external static pressure. Then, press the ” ” key to save the parameters. The unit external static pressure parameter has now been set.

3. Press ” ” to return to the previous page until exiting the parameter settings or perform no operations for 60s and the system will automatically exit the parameter settings.

Parameter code Parameter name

Parameter range

Default value

Remarks

n00

Unit external Unit external static pressure: static pressure 01/02/03/04/05/~/19

The Indoor Unit sets the

00

selected corresponding

static pressure value FF.

Static pressure setting parameter table

Unit power KW*100 HP 15 (0.6HP) 22 (0.8HP) 28 (1.0HP) 36 (1.2HP) 45 (1.7HP) 56 (2.0HP) 63 (2.2HP)

Level 0 Pa

Level 1 Pa

Static pressure settings

Level 2 Level 3 Level 4 Level 5

Pa

Pa

Pa

Pa

Level 7 Pa

Level 7-19 Pa

0

5

10

15

20

25

30

30

CAUTION · Parameters can be set while the unit is powered on or powered off.
· On the parameter setting page, the wired controller does not respond to a remote signal, and does not respond to the app remote control signal.
· When it is in the parameter settings page, the mode, fan speed, and switch buttons are invalid. Please refer to the remote controller manual for the setting parameters of the remote controller. For other Indoor Unit parameter settings, please refer to the manual of the wired controller.

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13. TEST RUN
13.01. Before the Test Run, Make Sure That
· Indoor Units and the Outdoor Unit are properly installed. · The piping is correct, and the refrigerant piping system has been checked for leakage. · Piping length and the amount of refrigerant charged have been recorded. · The wiring is correct and firm without virtual connection issues.Ground wires have been properly connected. · The voltage of the power supply is the same as the rated voltage of the air conditioner. · Heat insulation is complete. · There are no obstructions at the air inlet and outlet of the Indoor Unit and Outdoor Unit. · Fully open the check valves of the gas pipe and liquid pipe of the Outdoor Unit. · Turn on the power supply to preheat the Outdoor Unit for 12 hours.
13.02. Test Run
· Use the wired/remote controller to control the cooling or heating operation of the air conditioner according to the instructions.
· In the event of a failure, please troubleshoot according to the “Symptoms That Are Not Faults” in the “Precautions for Use” in this manual.

CAUTION Follow the trial run steps of the Outdoor Unit
13.03. Indoor Unit
· The wired/remote controller switch is operating normally. · The display of the wired/remote controller is normal, the function keys work normally, the room temperature
adjustment is normal, and the air flow and direction adjustment are normal. · The LED indicator is on. · Water discharge is normal. · Check the Indoor Units one by one for normal operation, and the cooling and heating functions are normal without
vibration or abnormal sound.
13.04. Outdoor Unit
· There are no vibrations or strange sounds during operation. · The fan, noise and condensation do not affect the neighbors. · There is no refrigerant leakage.

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13.05. Inspection After Installation
To ensure a comfortable indoor environment, please run down through the list to check whether the installation of the air conditioner meets the requirements. Insert a “” for Fail and a “” for Pass.

Check Item
Are the Indoor Units and ODUs securely installed? Has the installation of the Indoor Unit been completed?
Has a leak test been performed?
Is the heat insulation in good condition (refrigerant piping, drainage pipe, and air ducts)?
Were the copper pipes sealed before installation to prevent dust from entering?

Check Criteria The air conditioner does not fall or vibrate, and there is no noise. The unit works properly and no parts are burned out. The cold/hot air is sufficient.
There is no condensation dripping.
The compressor is functional.

Check Result (Pass/Fail)

Is the refrigerant piping filled with nitrogen for There is no oxide film on the inner surface of

shielded welding during the welding process (a the copper pipe. The system is functional with

nitrogen cylinder is on site)?

no major failures.

Has a water discharge test been performed? Is drainage smooth? Is the connection secure?

There is no water leakage.

Is the power supply voltage consistent with the The unit works properly and no parts are

specified voltage on the unit nameplate?

burned out.

Are the wires and pipes connected correctly?

The unit works properly and no parts are burned out.

Is the air conditioner safely grounded?

There is no electric leakage.

Have wires of the specified size been used?

The unit works properly and no parts are burned out.

Are the terminal screws securely fastened?

There is no electric shock or fire.

Are the inlets and outlets of the Indoor Units and ODUs free of obstruction?
Has the unit’s external static pressure been set for the Indoor Unit in constant speed mode?
Has the refrigerant piping length and refrigerant charge been recorded?
Was an access hole reserved at the installation position of the Indoor Unit?
Are air filters and grilles installed (at air inlets and outlets)?
Does the temperature of each room meet the requirements during testing?
Have you explained to the user how to operate the unit according to the user manual?

The cold/hot air is sufficient.
The cooling and heating functions are normal. The amount of refrigerant in the air conditioning system is clear. The maintenance can be easily carried out.
The unit works properly.
Users’ comfort needs can be satisfied.
The unit is effective.

Have you explained to the user how to operate

and clean the air filter, grille (air inlets and

The unit is effective.

outlets), etc.?

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Refrigerant Trading Authorisation No.: AU06394
©Copyright 2023 Actron Engineering Pty Limited ABN 34 002767240. ®Registered Trade Marks of Actron Engineering Pty Limited. ActronAir is constantly seeking ways to improve the design of its products. Therefore, specifications are subject to change without notice.
Installation & Commissioning Guide ECOFLEX MINI VRF R32 SERIES – 4 WAY COMPACT CASSETTE Doc. No.9590-5028-05 Ver. 1 230821

References

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