HITACHI RPIL-B18TFTANA Large Single Split Inverter Series Indoor and Outdoor Units Ducted Unit Instruction Manual

HITACHI RPIL-B18TFTANA Large Single Split Inverter Series Indoor and

Outdoor Units Ducted Unit

Product Information

The product is the Air Core Goo Large Single Split Inverter Series Indoor & Outdoor Units. It is a ducted unit and is a cooling-only type. The specific models available are:

• RPIL-B18TFTANA/RAS-B18TFTSNAA
• RPIM-B25TFTANA/RAS-B25TFTSNAA
• RPIM-B30TFTANA/RAS-B30TFTSNAA
• RPIM-B36TFTANA/RAS-B36TFTSNAA
• RPIM-B42TFTANA/RAS-B42TFTSMAA
• RPIM-B42TFTANA/RAS-B42TFTSNAA
• RPIM-B48TFTANA/RAS-B48TFTSMAA
• RPIM-B55TFTANA/RAS-B55TFTSMAA

The product uses the R32 refrigerant, which is flammable. It is important to follow the instructions and precautions provided in the user manual to ensure safe usage.

Product Usage Instructions

Installation

1. Read the instruction manual carefully before proceeding with the installation.
2. Maintenance personnel should also read the user manual and installation manual carefully before operation.
3. Ensure that the installation area meets the minimum requirements specified in the manual. If the area is smaller than the minimum installation area, do not install the air conditioner in that area.
4. Determine the minimum installation height based on the cold air pipe or indoor unit, whichever is the lowest. Refer to the provided table for the minimum installation height based on the amount of refrigerant to be filled.
5. If the required minimum installation height is less than 1.8 meters, recalculate the minimum installation space.
6. Follow the standard installation process for conventional air conditioner models (R410A, R22).

Maintenance
Regular maintenance is essential to ensure optimal performance and longevity of the air conditioner. Follow these maintenance guidelines:

1. Designate a maintenance officer responsible for maintaining the air conditioner.
2. Keep the air conditioning unit and hoses free from contamination.
3. Ensure that hoses or hoses are as short as possible to minimize air fluid.

For more detailed information on installation, maintenance, and other related topics, refer to the user manuals, installation manuals, and other similar documents provided with the product. It is recommended to keep these manuals for future reference, such as when repositioning or repairing the air conditioner.

DUCTED UNIT

COOLING ONLY TYPE

• RPIL-B18TFTANA/RAS-B18TFTSNAA
• RPIM-B25TFTANA/RAS-B25TFTSNAA
• RPIM-B30TFTANA/RAS-B30TFTSNAA
• RPIM-B36TFTANA/RAS-B36TFTSNAA
• RPIM-B42TFTANA/RAS-B42TFTSMAA
• RPIM-B42TFTANA/RAS-B42TFTSNAA
• RPIM-B48TFTANA/RAS-B48TFTSMAA
• RPIM-B55TFTANA/RAS-B55TFTSMAA

There are symbols on both indoor and outdoor equipment.

Warning (Risk of fire)| This symbol applies to the R32 refrigerant, the type of which is on the label of the outdoor unit.
---|---
In the case of this refrigerant, the R32 unit uses a flammable refrigerant.
Yes, if this refrigerant leaks and is exposed to

an open flame or a heated part.

It may produce harmful gases and pose a fire hazard.
Please read the instruction manual carefully before proceeding.
Maintenance personnel should read the user manual and installation manual carefully before operation.
More information can be found in user manuals, installation manuals, and other similar documents.

Safety measure

• Before installing or operating an air conditioner, read all safety information described in this manual carefully.
• The warnings and precautions outlined in this manual are relevant to your safety and should therefore be noted and cautioned.
• Give this manual together with the instruction manual to the customer and inform the customer to keep both manuals for future reference, such as when repositioning or repairing the air conditioner.
• The manufacturer shall not be liable for damage caused by neglect to follow the instructions in this manual.

Warning
Indicates an obvious or potentially dangerous situation that, if not avoided, could result in death or serious injury.

Caution
Indicates a potentially dangerous situation that could result in mild or moderate injury or property damage.

Warning

• To avoid electric shock, do not touch electrical parts immediately after turning off the power, and wait at least 10 minutes or more after turning off the power before touching electrical parts.
• Installation of this device should only be performed by experienced maintenance personnel or skilled installation personnel who are installed in accordance with this manual. Unskilled installation or incorrect installation may result in serious accidents such as injury, water leakage, electric shock, or fire. If this device is not installed in accordance with this manual, the manufacturer’s warranty will be void immediately.
• Do not turn on the lights until the entire operation is completed, if the lights are turned on before the entire operation is completed, it may cause serious accidents such as electric shock or fire.
• If the leaking air conditioner comes into direct contact with the flame, toxic gases may be produced.
• Installation must comply with the regulations, regulations or standards for cabling systems and equipment in each country, region or installation location.
• Do not use this unit with air or any other air conditioner not specified in the air hose, excessive pressure can cause rupture.
• During the installation process, before starting the compressor, be sure to install the air conditioner hose firmly. If the air hose is not properly installed and the 2-way or 3-way valve is open, do not operate the compressor, otherwise it may cause abnormal pressure in the cooling circuit until it breaks or may cause injury.
• When installing or repositioning an air conditioner, do not mix any other gases into the cooling loop than the specified air conditioner (R32). If air or other gases enter the refrigeration loop, the pressure in the loop can rise to abnormal levels and may cause rupture or injury.
• In order for the air conditioner to work properly, install it according to the instructions in this manual.
• To connect indoor equipment, outdoor equipment or branch boxes, air conditioning ducts and wires should be purchased from a local dealer.
• Do not modify the power cord, use an extension cord or connect a separate power cord, improper use may cause electric shock or fire due to poor connection, poor insulation or overcurrent.
• Do not use air steam to exhaust the air, but use the vacuum pump to exhaust the air generated by the device.
• In the outdoor unit, no air conditioner is added for discharging air.
• Do not use any method to speed up the melting or cleaning process unless advised by the manufacturer.
• The unit should be stored periodically in a room without a spark source (for example, a gas stove flame or an electric heater in operation).
• Do not Pierce or burn.
• Be careful, the air conditioner might not smell.
• Using the same vacuum pump with a different type of air conditioner may damage the vacuum pump or air conditioner.
• Use vacuum pump assembly gauge and clean air filling hose between R32 or R410A, respectively.
• Do not modify the unit, such as drilling holes in the air conditioner.
• During the pumping process, the air conditioner should ensure that the compressor is turned off, and do not remove the extension hose with the compressor running and the 2-way or 3-way valve open before removing the air conditioner hose, otherwise it may cause abnormal pressure in the cooling circuit, which can lead to rupture or injury.

Caution

• This equipment must be installed by certified and qualified technicians who can only handle liquid air conditioning water, please refer to the applicable regulations and laws in the area where this equipment is installed.
• Install this device in accordance with the applicable local laws and regulations at the installation site and follow the procedures specified by the manufacturer.
• This unit is part of the package that makes up this air conditioner and cannot be installed in complete sets or with equipment not authorized by the manufacturer.
• When a pipe less than 3 meters in length is installed, the sound of the outdoor unit will be transmitted to the indoor unit, which may produce working noise or abnormal noise.
• With the support of His Majesty the King, air conditioners must be installed in accordance with the Thai Electrical Installation standards of the Engineering Society of Thailand. (TIS)
• This product must be equipped with a leakage protection device (ELCB) or electric shock Protection device (RCD) with a sensitivity of 30 mAh and a time of 0.1 seconds or less, otherwise it may cause electric shock or fire in the event of a failure of the device or insulation.
• The device does not have explosion-proof performance, so it should not be installed in explosive weather conditions.
• This device has no user repairable parts, please consult authorized maintenance personnel during maintenance.
• When moving or relocating the air conditioner, consult an experienced maintenance person to remove and reinstall the unit.
• Young children should be controlled to ensure that they do not come to play with this electrical device.
• This device is not intended for use by persons (including children) with physical, sensory or mental impairments or lack of experience or knowledge, unless their use is supervised or directed by those responsible for their safety.
• Do not touch the aluminum heat sink of the heat exchanger located inside the indoor and outdoor equipment to avoid injury during installation or maintenance.
• Do not place other appliances or household appliances under appliances indoors and outdoors, water droplets from condensation of appliances may make them wet and may cause property damage or failure.

Precautions for using air conditioners R32
The initial installation process is the same as for conventional air conditioner models (R410A, R22), however, please note and be careful with the following points.:

Warning

• Because the working pressure is higher than the working pressure of the R221.6 air servant model, some pipes and fixtures and maintenance tools are different. (See section “2.1 Special Tools for Air Conditioning R32 (R410A)”), especially when replacing an R22 air conditioner model with a new R32 air conditioner model, the door ducts and extension nuts should be replaced with connecting ducts and nuts for R32 and R410A.
• The R32 and R410A models have different sizes of spiral diameters to prevent the wrong type of air conditioner from being incorporated into the R22, and for safety reasons, so it’s always a good idea to check first. [Air intakes R32 and R410A have 1/2 inch thread diameters.]
• Be more careful than the R22 air conditioning model, taking care not to let foreign objects (such as oil, etc.) into the pipe. In addition, when storing pipes, the opening should be tightly sealed, such as paste, tape, etc. (The method for R32 is the same as for R410A).

Caution

• If the unventilated area is smaller than the minimum installation area, the air conditioner should not be installed in this area.
• The installation height is the minimum installation height, that is, the minimum installation height of the cold air pipe or indoor unit, whichever is the lowest. The following table is determined according to the minimum installation height of 1.8 meters and 2.2 meters
• If the required minimum installation height is less than 1.8 meters, the minimum installation space must be recalculated.

Minimum Room Size Table for installation (Amin)

The amount of refrigerant to be filled (M) (kg)

| Minimum room area (Amin) (m²)
---|---
Installation Height (ho) (m)
1.8| 2.2
M ≤ 1.224| —| —
1.224 < M ≤ 1.836| 3.25| 2.15
1.836 < M ≤ 2.448| 5.75| 3.85
2.448 < M ≤ 3.672| 13.00| 8.70
3.672 < M ≤ 4.896| 23.00| 15.30
4.896 < M ≤ 6.12| 36.00| 24.00
6.12 < M ≤ 7.956| 60.40| 40.40

Refrigerant packaging cost table (M max)

Minimum room area (Amin) (m²)

| The amount of refrigerant filled (M) (kg)
---|---
Installation Height (ho) (m)
1.8| 2.2
Amin ≤ 4| 2.05| 2.50
4 < Amin ≤ 7| 2.71| 3.31
7 < Amin ≤ 10| 3.24| 3.96
10 < Amin ≤ 15| 3.97| 4.85
15 < Amin ≤ 20| 4.58| 5.60
20 < Amin ≤ 30| 5.61| 6.86
30 < Amin ≤ 50| 7.24| 8.85

1. Installation (area)
   • Installation area with minimal piping
   • Installation area to protect piping from physical damage
   • Installation area complies with national gas regulations
   • The installation area can be maintained using mechanical connections
   • If mechanical ventilation is required, the vents must not be blocked by anything.
   • To dispose of this equipment, it should comply with national regulations and operate normally.
2. Maintenance
3. Maintenance Officer

  * Individuals involved in operating or able to manage the air conditioning cycle should hold a valid qualification issued by an industrial certification assessment body, which has the authority to certify skills.
  * The ability to operate air conditioners safely according to instructions approved by industry authorities
  * Maintenance and repairs requiring the assistance of qualified technicians must be carried out under the supervision of technicians skilled in the use of flammable air conditioners.
  * Repairs can only be carried out according to the manufacturer’s recommendations.
2.  **Working**
  * Safety checks must be carried out before starting to operate flammable air conditioning filling systems to ensure that the risk of flammability is minimized, and then precautions 2-2 to 2-8 should be followed when repairing the refrigeration system before operating the system.
  * Work should be carried out in a well-controlled manner to minimize the risk of combustible gases or vapors during operation.
  * All maintenance personnel and others working nearby must be aware of the work being done.
  * You shouldn’t work in tight Spaces.
  * The area around the work area should be separated.
  * Ensure safe working conditions in the area by controlling flammable materials.
3.  **Checking if there is air conditioner**
  * Before and during operation, the area should be checked with a suitable air conditioning detector in order to
  * Does the technician know if there are flammable substances in the workplace air
  * Ensure that the leak detection equipment used is suitable for flammable air condition ers.
  * For example, depending on the condition characteristics of the device, it does not produce sparks, is sealed or secure.
4.  **Preparation of fire extinguishers**
  * If heat is used for the operation of air conditioning equipment or any other component, fire extinguishing equipment should be available at hand.
  * Prepare a dry powder or CO2 fire extinguisher near the air conditioner filling area.
5.  **No fire source**
  * Workers who use refrigeration systems for plumbing work or add air conditioning should not use any fire source that could cause a fire or explosion.
  * All sources of combustible fire, including smoking, should be kept away from where equipment is being installed, serviced, moved or handled, during which time air vapors may be discharged into the surrounding area.
  * Before working, check the area around the equipment to ensure that there is no risk of flammable or flammable hazards. Combustible materials should be labeled “No smoking”.
6.  **Ventilated area**
  * Make sure the area is open or well ventilated before entering the system or doing any high heat work.
  * The ventilation level should work continuously during operation.
  * Ventilation should be safely ventilated to the air conditioning, and the air medicine is well driven to the outside atmosphere.
7.  **Refrigeration Equipment Inspection**
  * If electrical parts are replaced, they must be fit for use and meet the correct specifications.
  * Always follow the manufacturer’s service and maintenance instructions.
  * If in doubt, please consult and assist the manufacturer’s technical department.
  * The installation site checklist for the use of flammable air conditioners should be followed as follows:
  * The fill size will depend on the size of the room in which the air conditioner filler is installed.
  * If the air conditioner water circuit is used indirectly, check the presence of air conditioner water.
  * Text on the device must be clear and easy to read, and difficult-to-read text and symbols should be corrected.
  * Air conditioning ducts or components should be installed in a position where they will not be corroded by any substance, unless these components are made of corrosion -resistant or well-protected materials.
8.  **Electrical Equipment Inspection**
  * Repair and maintenance of electrical components shall include a preliminary safety check and component inspection procedure.
  * If an abnormal condition affecting safety is observed, electrical connections should not be connected to the circuit until the fault is rectified.
  * If such an exception cannot be corrected immediately and work needs to be resumed, an appropriate temporary solution should be used.
  * Any anomalies should be reported to the equipment owner so that all relevant parties can be notified.
  * The initial security check should include:
  * Check capacitor discharge: This should be done safely to avoid sparking.
  * Check that no live electrical parts or wires remain open while refueling, servicing, or draining air from the system.
  * Check the continuity of the grounding.

3. Repair of sealing parts
   • When servicing sealed components, all power to the operating device must be cut off before removing covered covers, etc.
   • If it is absolutely necessary to supply electricity to the device during maintenance, there must be a leak monitoring method that works around the clock at the most critical point, to warn of possible dangerous situations.
   • Special care should be taken to ensure that the housing does not undergo changes that affect the level of hazard protection when electrical components are used. These problems include broken wires, too many connections, electrical connectors that do not meet original specifications, sealing materials, tearing, inserting improperly compressed bushings, etc.
   • Make sure the device is securely connected.
   • Ensure that the seal or sealing material used does not deteriorate to the extent that it prevents air and water from leaking into the atmosphere.
   • Replacement parts must meet the manufacturer’s specifications. Detailed rules and regulations: The use of silicone sealants may reduce the effectiveness of some leak detectors. The internal safety components must not be removed before using such equipment.
4. Maintenance of internal safety components
   • Charging loads or permanent current-sensing loads should not be applied to circuits without verification that exceed the voltage and current permitted by the air conditioner used.
   • When the air contains flammable substances, the internal safety components are the only ones that can operate.
   • The test instrument shall have accurate coordinates.
   • Replace parts only with spare parts specified by the manufacturer.
   • If other spare parts are used, it may cause air conditioning water to leak into the atmosphere and catch fire.
5. Wiring
   • Check the wiring to ensure that it is not subject to tearing, corrosion and extreme pressure.
   • Too sharp edge vibration or any other harsh environmental effects.
   • Such inspections should take into account the effects of service life or continuous vibration from sources such as compressors or fans.
6. Detection of flammable air conditioners
   • Do not use fire sources to locate or detect air conditioning water leaks.
   • Do not use a leak detection flame head (or any other detection device that uses an open flame).
7. How to detect leaks
   • An electronic leak detector should be used to detect flammable air conditioners, but the sensitivity value may not be sufficient or may need to be recalibrated.
   • Make sure the leak detector is not a source of fire and is suitable for the air conditioner being used.
   • The leak detector should be set to a percentage of the air conditioner LFL and should be calibrated with the air conditioner used to confirm the correct gas percentage (up to 25%).
   • Liquids with leak detection properties are suitable for most pharmaceutical applications and chlorine-containing laundry water should not be used as chlorine may interact with air conditioning and corrode copper pipes.
   • If a leak is suspected, extinguish or extinguish the fire.
   • If an air conditioner leak that requires soldering of pipes is found, all air conditioning water must be transferred or separated from the system (by closing various valves and storing in a part of the system away from such leaks).
   • Nitrogen gas (OFN) is used to remove air from the system before and during the bonding process.
8. Air conditioner water transfer
   • General procedures should be followed when opening the air conditioning circuit for repair or for any other purpose
   • However, it is important to follow best practices because of flammability and flammability
   • Something to remember
   • The following procedures should be followed:
   • Air conditioning
   • Use inert gases to remove air from the loop
   • Rinse
   • Revent the air with an inert gas.
   • Open the circuit by cutting or brazing
   • Air conditioning refills should be pumped using appropriate drainage cylinders.
   • OFN should be used to “clean” the system to ensure system safety.
   • This procedure may need to be repeated several times.
   • Do not use compressed air or oxygen for this operation.
   • Flushing is completed by destroying the vacuum in the system using OFN, increasing the vacuum to the pressure generated by the operation, then venting it into the atmosphere and finally into the vacuum.
   • This process should be repeated several times until there is no air conditioning in the system.
   • When the last OFN is added, the system should be drained to atmospheric pressure in order to be able to work.
   • This work is especially important when welding on pipes.
   • Ensure that the outlet of the vacuum pump is not near any fire source and can be ventilated.
9. Guidelines for refilling the air conditioner
   • In addition to general refueling practices, the following regulations should be followed:
   • When using air conditioning filling equipment, ensure that different types of air conditioning are free from contamination.
   • Hoses or hoses should be as short as possible to minimize the amount of air-fluid contained in such hoses and hoses.
   • The air conditioner transfer cylinder should be kept upright.
   • Be sure to ground the cooling system before adding th e air conditioner to the system.
   • When filling is complete, close the system label (if it is not already there).
   • Be very careful not to add too much air conditioning to the cooling system.
   • OFN should be used to test the pressure before adding air conditioning to the system.
   • After the air conditioner is full, check the system for leaks before use.
   • Check for releaks before leaving the installation site.
10. Deactivating the system
    • Before performing this exercise, it is very important that the technician thoroughly understand the equipment and its details
    • It is important to remove all air conditioners safely
    • Prior to this, air and oil samples should be analyzed before the pumped air is reused
    • It is important to have available electricity before starting the operation
    • Must know the equipment and its operation.
    • Electrical isolation system.
    • Before following the Code of Conduct, ensure that:
      • There are devices for managing the various mechanisms of the air conditioning transfer cylinder
      • All personal protective equipment should be provided and properly worn
      • The process of pumping out the air conditioner must be supervised by qualified technicians at all times
      • Air conditioning drainage equipment and cylinders must meet the required standards
    • Drug aspiration if possible.
    • If there is no vacuum, use combined hoses to draw air conditioning water from different parts of the system.
    • Make sure the cylinder is set correctly before pumping.
    • Start pump and follow the manufacturer’s instructions.
    • Do not allow the cylinder to overflow (not more than 80% of the liquid air volume).
    • Do not expose the cylinder to excessive working pressure, even temporarily.
    • When the cylinder is filled as planned and the process is complete, ensure that th e cylinder and its equipment are removed from the working area and the isolation valve located on the equipment is closed.
    • The pumped air conditioner shall not be re-injected into another cooling system unless the system has been cleaned and inspected.
11. Close tag
    • Signs on appliances should be turned off to indicate that the system is turned off and the air conditioning water has been used up.
    • Signs should be dated and marked.
    • Make sure the label on the appliance indicates that the air conditioner is flammable.
12. Reparation
    • When draining the air conditioner from the system, whether for maintenance or to deactivate the system, it is important to take out all the air conditioner water safely.
    • When transferring air conditioners to cylinders, be sure to use only suitable air conditioner cylinders.
    • Ensure that the number of cylinders suitable for all air-filled systems is sufficient.
    • All cylinders used to drain the air conditioner should be determined and the indicator sign should be closed (for example, a special cylinder for pumping air conditioner water out of the system).
    • The cylinder should be equipped with a pressure-reducing valve and work in the correct working sequence relative to the open valve.
    • If possible, the cylinders used to pump the air conditioner should be flushed from a system that does not contain the air conditioner and cooled before starting to pump the air conditioner from the system.
    • The equipment used to pump air conditioning water from the system should be placed in the correct working order, the documentation shows that the working procedures for the equipment are at hand, and the equipment used to pump air conditioning water from the system should be suitable for pumping flammable air conditioning from the system.
    • In addition, the scale should be calibrated and placed in the correct working order.
    • Pipes shall have leak-free joints in good condition.
    • Before using the pump, check that the pump is in the correct working condition, that the pump is kept in good condition, and that the associated electrical components are sealed to prevent air conditioning from discharging. If there is a concern, it is better to consult the manufacturer.
    • Air conditioners withdrawn from the system should be placed in the air conditioner transfer canisters removed from the system and returned to the air conditioner dealer, and waste transfer documents should be prepared in accordance with regulations
    • Do not mix air conditioning in the pump, especially in the cylinder.
    • If the compressor or compressor oil flows, make sure to clean the compressor or compressor oil to an acceptable level to ensure that flammable air conditioning does not remain in the lubricant.
    • The cleaning process should be carried out before the compressor returns to the distributor.
    • The compressor housing can only be electrically heated to speed up this process.
    • When removing oil from the system, it should be done safely.

Safety Precautions

Precautions for using R32 refrigerant
The basic installation work procedures are the same as the conventional refrigerant (R22 or R410A). However, pay attention to the following points:

WARNING

1. Transport of equipment containing flammable refrigerants.
   Attention is drawn to the fact that additional transportation regulations may exist with respect to equipment containing flammable gas. The maximum number of pieces of equipment or the configuration of the equipment, permitted to be transported together will be determined by the applicable transport regulations.

2. Marking of equipment using signs
   Signs for similar appliances (containing flammable refrigerants) used in a work area generally are addressed by local regulations and give the minimum requirements for the provision of safety and/or health signs for a work location. All required signs are to be maintained and employers should ensure that employees receive suitable and sufficient instruction and training on the meaning of appropriate safety signs and the actions that need to be taken in connection with these signs. The effectiveness of signs should not be diminished by too many signs being placed together. Any pictograms used should be as simple as possible and contain only essential details.

3. Disposal of equipment using flammable refrigerants
   Compliance with national regulations

4. Storage of equipment/appliances
   The storage of equipment should be in accordance with the manufacturer’s instructions.

5. Storage of packed (unsold) equipment

   • Storage package protection should be constructed such that mechanical damage to the equipment inside the package will not cause a leak of the refrigerant charge.
   • The maximum number of pieces of equipment permitted to be stored together will be determined by local regulations.

6. Information on servicing

7. Checks to the area
   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 should be complied with prior to conducting work on the system.

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

9. General work area

10. 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.

11. 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.

12. Checking for presence of refrigerant

13. 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.

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

15. Presence of fire extinguisher

  * If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand.
  * Have a dry powder or CO fire extinguisher adjacent to the charging area. 2 6-6 No ignition sources
  * No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion.
  * All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during which flammable refrigerant can possibly be released to the surrounding space.
  * Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. “No Smoking” signs shall be displayed.
6.  **Ventilated area**
  * Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work.
  * A degree of ventilation shall continue during the period that the work is carried out.
  * The ventilation should safely disperse any released refrigerant and preferably expel it externally into the air.
7.  **Checks to the refrigeration equipment**
  * Where electrical components are being changed, they shall be fit for the purpose and to the correct specification.
  * At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt consult the manufacturer’s technical department for assistance.
  * The following checks shall be applied to installations using flammable refrigerants:
  * The charge size is in accordance with the room size within which the refrigerant containing parts are installed;
  * The ventilation machinery and outlets are operating adequately and are not obstructed;
  * If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of refrigerant; Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected;
  * Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any substance which may corrode refrigerant containing components, unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being so corroded.
8.  **Checks to electrical devices**
  * Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures.
  * If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with.
  * If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used.
  * This shall be reported to the owner of the equipment so all parties are advised.
  * Initial safety checks shall include:
    1. (1) That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;  

(2) That there no live electrical components and wiring are exposed while charging, recovering or purging the system;
(3) That there is continuity of earth bonding.

7. Repairs to sealed components

   • During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc.
   • If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation.
   • Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such a way that the level of protection is affected.
   • This shall include damage to cables, excessive number of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc.
   • Ensure that apparatus is mounted securely.
   • Ensure that seals or sealing materials have not degraded such that they no longer serve the purpose of preventing the ingress of flammable atmospheres.
   • Replacement parts shall be in accordance with the manufacturer’s specifications.
     NOTE: The use of silicon sealants may inhibit the effectiveness of some types of leak detection equipment. Intrinsically safe components do not have to be isolated prior to working on them.

8. Repair to intrinsically safe components

   • Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use.
   • Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere. The test apparatus shall be at the correct rating.
   • Replace components only with parts specified by the manufacturer.
   • Other parts may result in the ignition of refrigerant in the atmosphere from a leak.

9. Cabling

   • Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects.
   • The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans.

10. Detection of flammable refrigerants

    • Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks.
    • A halide torch (or any other detector using a naked flame) shall not be used.

11. Leak detection methods
    The following leak detection methods are deemed acceptable for systems containing flammable refrigerants:

    • Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.)
    • Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used.
    • Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant employed and the appropriate percentage of gas (25 % maximum) is confirmed.
    • Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work.
    • If a leak is suspected, all naked flames shall be removed/ extinguished.
    • If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part of the system remote from the leak.
    • Oxygen free nitrogen (OFN) shall then be purged through the system both before and during the brazing process.

12. Removal and evacuation

    • When breaking into the refrigerant circuit to make repairs – or for any other purpose conventional procedures shall be used.
    • However, it is important that best practice is followed since flammability is a consideration.
    • The following procedure shall be adhered to:
    • Remove refrigerant;
    • Purge the circuit with inert gas;
    • Evacuate;
    • Purge again with inert gas;
    • Open the circuit by cutting or brazing.
    • The refrigerant charge shall be recovered into the correct recovery cylinders.
    • The system shall be “flushed” with OFN to render the unit safe.
    • This process may need to be repeated several times.
    • Compressed air or oxygen shall not be used for this task.
    • Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until the working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum.
    • This process shall be repeated until no refrigerant is within the system. When the final OFN charge is used, the system shall be vented down to atmospheric pressure to enable work to take place.
    • This operation is absolutely vital if brazing operations on the pipe-work are to take place.
    • Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is ventilation available.

13. Charging procedures

    • In addition to conventional charging procedures, the following requirements shall be followed:
    • Ensure that contamination of different refrigerants does not occur when using charging equipment.
    • Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them.
    • Cylinders shall be kept upright.
    • Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.
    • Label the system when charging is complete (if not already).
    • Extreme care shall be taken not to overfill the refrigeration system.
    • Prior to recharging the system it shall be pressure tested with OFN.
    • The system shall be tested for leak on completion of charging but prior to commissioning.
    • A follow up leak test shall be carried out before leaving the site.

14. Decommissioning
    Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its details. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of reclaimed refrigerant. It is essential that electrical power is available before the task is commenced.

    • Become familiar with the equipment and its operation.
    • Isolate system electrically.
    • 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.
    • Pump down the refrigerant system, if possible.
    • If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.
    • Make sure that the cylinder is situated on the scales before recovery takes place.
    • Start the recovery machine and operate in accordance with the manufacturer’s instructions.
    • Do not overfill cylinders. (No more than 80 % volume liquid charge).
    • Do not exceed the maximum working pressure of the cylinder, even temporarily.
    • When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from the site promptly and all isolation valves on the equipment are closed off.
    • Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.

15. Labeling

    • Equipment shall be labeled 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.

16. Recovery

    • When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely.
    • When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed.
    • Ensure that the correct number of cylinders for holding the total system charge is available.
    • All cylinders to be used are designated for the recovered refrigerant and labeled for that refrigerant (i.e. special cylinders for the recovery of refrigerant).
    • Cylinders shall be complete with pressure relief valves 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 the 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 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 of the compressor body shall be employed to accelerate this process.
    • When oil is drained from a system, it shall be carried out safely.

WARNING

• The appliance shall be installed, operated, and stored in a room with a floor area larger than X (X see below).
• The installation of pipe work shall be kept in a room with a floor area larger than X (X see below).
• The pipe-work shall be in compliance with national gas regulations.
• When moving or relocating the air conditioner, consult experienced service technicians for disconnection and reinstallation of the unit.
• Do not place any other electrical products or household belongings under the indoor unit or outdoor unit. Condensation dripping from the unit might get them wet, and may cause damage or malfunction of your property.
• Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
• The appliance shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater).
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odor.
• To keep ventilation openings clear of obstruction.
• The appliance shall be stored in a well-ventilated area where the room size meets the requirements as specified for operation.
• The appliance shall be stored in a room without continuously operating open flames (for example an operating gas appliance) and ignition sources (for example an operating electric heater).
• Any person involved with a refrigerant circuit should hold a valid certificate from an industry-accredited assessment authority, which authorizes their competence to handle refrigerants safely in accordance with required specifications.
• Service shall only be performed as recommended by the equipment manufacturer.
• Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants.
• The appliance shall be installed and stored so as to prevent mechanical damage.
• Mechanical connectors used indoors shall comply with ISO 14903. When mechanical connectors are reused indoors, sealing parts shall be renewed. When flared joints are reused indoors, the flare part shall be re-fabricated.
• The installation of pipe work shall be kept to a minimum.
• Mechanical connections shall be accessible for maintenance purposes.

Required minimum room area X (m2)

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

WARNING| This symbol shows that this appliance uses a flammable refrigerant. If the refrigerant is leaked and exposed to an external ignition source, there is a risk of fire.
---|---
CAUTION| This symbol shows that the operation manual should be read carefully.
CAUTION| This symbol shows that service personnel should handle this equipment with reference to the installation manual.
CAUTION| This symbol shows that information is available such as the operating manual or installation manual.

Alert Symbols:

• DANGER : The symbol refers to a hazard that can result in severe personal injury or death.
• WARNING : The symbol refers to a hazard or an unsafe practice that may result in severe personal injury or death.
• CAUTION : The symbol refers to a hazard or an unsafe practice that may result in personal injury, product or property damage.
• NOTE : It refers to the remarks and instructions to the operation, maintenance, and service.
• This air conditioner must be installed properly by qualified personnel in accordance with the installation instructions provided with the unit. The appliance shall be installed in accordance with national wiring regulations.
• Before installation, check if the voltage of the power supply at the installation site is the same as the voltage shown on the nameplate.

DANGER

• You must not carry on any transformation to this product, otherwise, it may possibly cause such consequences as water leakage, breakdown, short-circuit, electric shock, fire, etc.
• Work such as tube line welding, etc. should be carried out far away from the flammable explosive material vessels, including the air conditioner refrigerant, to guarantee the security of the site.
• To protect the air conditioner from heavy corrosion, avoid installing the outdoor unit where salty seawater can splash directly onto it or in sulfurous air near a spa. Do not install the air conditioner where excessively high heat-generating objects are placed.

WARNING

• If the supply cord is damaged, it must be replaced by the factory or its service department in case of danger.

• The place where this product is installed must have a reliable electrical earth facility and equipment. Please do not connect the grounding of this product to various kinds of air-feeding tube lines, the drain lines, the lightning protection facility as well as other tube lines to avoid receiving an electric shock and damages caused by other factors. Wiring must be done by a qualified electrician. All the wiring must comply with the local electrical codes.

• Monitor the capacity of the electric current with your electrical kilowatt-hour meter wires and socket before installation.

• The power wire where this product is installed must have the independent leakage protective device and the electric current over-load protection device which are provided for this product. If not, it will cause an electric shock or a fire.

• 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. This means that disconnection, which can provide full disconnection in all poles, must be incorporated in the fixed wiring in accordance with the wiring rules.

• Type and rating of circuit breakers/ELB is detailed in the “Installation and Maintenance part. If the fuses in units blow, please call the service agency to replace it with
  a new one. Please do not replace it by yourself, or else it may result in an accident, for example, an electric shock.

• The cord of the H07RN-F type or the electrically equivalent type must be used for power connection and interconnection between the outdoor unit and indoor unit. The size of the cord is detailed in the “Installation and Maintenance” part.

• The wiring diagram with a clear indication of the connections and wiring to external control devices and supply cord is detailed in the “Electrical Wiring Diagram” part.

• The method of connection of the appliance to the electrical supply and interconnection of separate components is detailed in the “Installation and Maintenance” part.

• CAUTION: In order to avoid a hazard due to inadvertent resetting of the thermal
  cut-out, this appliance must not be supplied through an external switching device, such as a timer, or connected to a circuit that is regularly switched on and off by the utility.

• It is necessary to allow disconnection of the appliance from the supply after installation. The disconnection may be achieved by incorporating a switch in the fixed wiring in accordance with the wiring rules.

• The information of the dimensions of the space necessary for the correct installation of the appliance including the minimum permissible distances to adjacent structures is detailed in the “Installation and Maintenance” part.

• The range of external static pressures for ducted appliances is detailed in the “Installation and Maintenance” part.

• Instructions on additional charging of refrigerants are detailed below.

• Read this manual carefully before using this air conditioner. If you still have any difficulties or problems, consult your dealer for help.

• The air conditioner is designed to provide you with comfortable room conditions. Use this unit only for its intended purpose as described in this instruction manual.

WARNING

• Never use gasoline or other inflammable gas near the air conditioner, which is very dangerous.
• When the air conditioner is abnormal, such as burnt smell, appearance deformation, fire, smoke, etc., it is forbidden to continue to use the air conditioner and the main power switch must be cut off immediately and contact the agent.

CAUTION

• Do not turn the air conditioner on or off from the power main switch. Use the
• ON/OFF operation button.
• Do not stick anything into the air inlet and air outlet of both the indoor and outdoor units. This is dangerous because the fan is rotating at a high speed.
• Do not cool or heat the room too much if babies or invalids are present.
• Storage condition:
  • Temperature -25~60℃
  • Humidity 30%~80%
• Heating and electric heater functions are not available for cooling-only models.
• This manual should be considered as a permanent part of the air conditioner equipment and should be kept with it.

Composition of the Air Conditioner

Indoor unit

1. Air inlet
2. Electric box
3. Refrigerant pipe (Liquid)
4. Refrigerant pipe (Gas)
5. Drain pipe (Connect with pump)
6. Drain pipe
7. Air outlet

Outdoor unit

Remote controller

• You can control the air conditioner with the wired or wireless remote controller.
• It is used for controlling power ON/OFF, setting the running mode, temperature, fan speed and other functions. There are different types of remote controllers that can be used.
• Operation instructions will be further specified in remote controller’s manual.
• Please read it carefully before using this appliance and keep it for future reference.

Wired controller

Remote controller

Note:

• The figures are based on the external views of the standard model.
• Consequently, the shape may differ for the air conditioner model you have selected.

Operation Manual

Special remarks

• 3-minute protection after the compressor stops
  To protect compressor, the system implements a 3 minutes once operation is stopped.

• 5 minute-protection
  Compressor must run for at least 5 minutes once operation starts. During the 5 minutes, compressor will not stop even after set point is reached. The system will shut off if manually turned off using the remote controller.

• Cooling operation
  The fan of the indoor unit will never stop running in cooling operation. It continues to operate even if the compressor stops working.

• Heating operation
  Heating capacity depends on external factors like outdoor unit temperature. Heating capacity might decrease if outdoor ambient temperature is too low.

• Anti-freezing function during cooling
  When the air temperature from the indoor outlet is too low, the unit will run for some time under the fan mode, to avoid frost or ice forming on the indoor heat exchanger.

• Cold air prevention
  Within several minutes after the heating mode is selected, the fan of the indoor unit will not run until the heat exchanger of the indoor unit reaches a certain temperature to prevent cold draft.

• Defrosting
  When the outdoor temperature is too low, ice may form on the outdoor heat exchanger, reducing heating performance. When this happens, the defrost cycle of the system will start. During the defrost cycle, the indoor unit fan stops (or runs at a very low speed in some cases), to prevent cold draft. Once the defrost cycle is complete, heating operation and the fan speed resume.

• Discharging the residual heating air
  When stopping the air conditioner in normal operation, the fan motor will run with low speed for a while to blow out the residual hot air.

• Auto restart from power outage
  When the power supply is recovered after power outage, all presets still be in effect and the system will run according to the previous settings.

NOTE
There is no heating function in cooling only type

Troubleshooting

CAUTION
When drain water overflows from the indoor unit, stop the operation and contact your dealer. When you smell or see white smoke coming out of the unit, turn OFF the main power supply and contact your dealer.

1. If Trouble issue persists
   If the trouble issue persists even after checking the following, contact qualified, licensed service provider， and inform them of the following items.

2. Unit Model Name

3. Details of the issue

4. No Operation

   • Check if there’s power and the unit is turned ON.
   • Check whether the SET TEMP is set at the correct temperature.

5. Not Cooling or Heating Properly

   • Check for obstruction of air flow in outdoor or indoor units.
   • Check if there are too many heating sources in the room.
   • Check if the air filter is clogged with dust.
   • Check if the doors or windows are open.
   • Check if the temperature condition is within the operation range.

6. This is Not Abnormal

   • Odor from Indoor Unit
     Unpleasant odor diffuses from indoor unit after a long period of time. Clean the air filter and panels or allow a good ventilation.

   • Sound from Deforming Parts
     During system starting or stopping, a sound might be heard. However, this is due to thermal normal wear of plastic parts. It is not abnormal.

   • Steam from Outdoor Heat Exchanger
     During defrosting operation, ice on the outdoor heat exchanger melts resulting in steam.

   • Dew on Air Panel
     When the cooling operation continues for a long period of time under high humidity conditions, dew may form on the air panel.

   • Refrigerant Flow Sound
     While the system is being started or stopped, the refrigerant flow sound may be heard.

   • Protection for First Heating Run
     If the air conditioner is stored below 0℃ for a long time ,the unit might stop to protect the compressor when running heating mode for the first time especially in the condition of long pipe, and it will restart after that. It is not abnormal.

Diagram of Refrigerant Cycle

Refrigerant Flow Diagram

Indoor unit

List of componentnames

Outdoor unit

List of componentnames

Installation and Maintenance

Safety Notice

WARNING

• Installation should be left to the dealer or other professional personnel. (Improper installation may cause water leakage, electrical shock, or fire.)
• Install the unit according to the instruction given in this manual. (Incomplete installation may cause water leakage, electrical shock, or fire.)
• Be sure to use the supplied or specified installation parts. (Use of other parts may cause the unit to come to lose, water leakage, electrical shock, or fire.)
• Install the air conditioner on a solid base that can support the unit weight. (An inadequate base or incomplete installation may cause injury in the event the unit falls off the base. )
• Electrical work should be carried out in accordance with the installation manual and the local electrical wiring rules or code of practice. (Insufficient capacity or incomplete electrical work may cause electrical shock or fire. )
• Be sure to use a dedicated power circuit. (Never use a power supply shared by another appliance. )
• For wiring, use a cable long enough to cover the entire distance with no connection, do not use an extension cord.
• Do not put other loads on the power supply, use a dedicated power circuit. (Failure to do so may cause abnormal heat, electric shock or fire.)
• Use the specified types of wires for electrical connections between the indoor and outdoor units. (Firmly clamp the interconnecting wires so their terminals receive no external stress.)
• Incomplete connections or clamping may cause terminal overheating or fire.
• After connecting interconnecting and supply wiring, be sure to shape the cables so that they do not put undue force on the electrical covers or panels. (Install covers over the wires, incomplete cover installation may cause terminal overheating, electrical shock or fire.)
• When installing or relocating the system, be sure to keep the refrigerant circuit free from substances other than the specified refrigerant, such as air. (Any presence of air or other foreign substance in the refrigerant circuit causes an abnormal pressure rise or rupture, resulting in injury.)
• If any refrigerant has leaked out during the installation work, ventilate the room. (The refrigerant reduces a toxic gas if exposed to flames.)
• After all installation is completed, check to make sure that no refrigerant is leaking out. (The refrigerant produces a toxic gas if exposed to flames.)
• When carrying out piping connection, take care not to let air substances other than the specified refrigerant go into refrigeration cycle. (Otherwise, it will cause lower capacity, abnormal high pressure in the refrigeration cycle, explosion and injury. )
• Be sure to establish an earth. Do not earth the unit to a utility pipe, arrester, or telephone earth. Incomplete earth may cause electrical shock. (A high surge current from lightning or other sources may cause damage to the air conditioner.)
• An earth leakage circuit breaker may be required depending on site condition to prevent electrical shock. (Failure to do so may cause electrical shock. )
• Disconnect the power supply before completion of wiring, piping, or checking the unit.
• Be careful when moving the indoor unit and outdoor unit. Do not make the outdoor unit incline over 45 degree. Please avoid being hurt by the sharp edge of the air conditioner.
• During wired controller installation, ensure that the length of the wire between the indoor unit and wired controller is within 40 meters.

CAUTION

• Do not install the air conditioner in a place where there is danger of exposure to inflammable gas leakage. (If the gas leaks and builds up around the unit, it may catch fire.)
• Establish drain piping according to the instructions of this manual. (Inadequate piping may cause flooding.)
• Tighten the flare nut according to the specified method such as with a torque wrench. (If the flare nut is tightened too hard, the flare nut may crack after a long time and cause refrigerant leakage.)

Tools and Instruments for Installation

Installation of the Indoor Unit

CAUTION
During installation, do not damage the insulation material on the surface of the indoor unit.

Initial Check

CAUTION

• When moving the unit after unpacking, make sure to lift it by holding its lifting lugs. Do not exert any pressure on other parts, especially the refrigerant piping, drain piping, and flange parts.
• Wear protective gears when installing the unit.

(Unit:mm)

1. Reserve necessary maintenance port when the ceiling is not detachable.
2. The location of the maintenance port should ensure removal of the electric box cover and internal components is easy to perform.

18K~36K

1. Reserve necessary service access panel when the ceiling is not removable.
2. Service access panel should allow easy access to the electrical box and indoor unit maintenance.

• Air inlet and outlet are free of obstructions.
• The air passage is not blocked.
• Condensate can drain properly.
• Overhead structure can support the weight of the indoor unit.
• The false ceiling is not seem to be at an incline.
• Adequate clearance for maintenance and service is provided.(See Fig.3.1.1 )
• Piping between the indoor and outdoor units is within the allowable limits.(refer to the installation of the outdoor unit )
• The indoor unit, outdoor unit, power supply wiring and transmission wiring must be kept at least 3.3ft.(1m) away from televisions and radios to prevent electromagnetic interference. (Noise may be generated depending on the conditions under which the electric wave is generated, even if a 3.3ft allowance is maintained.)
• Do not install the indoor unit in a machine shop or kitchen where vapor from oil or its mist flows to the indoor unit. The oil will deposit on the heat exchanger, thereby reducing the performance of the indoor unit, and in severe cases, damaging the indoor unit.
• Use suspension bolts to install the unit. Check whether or not the overhead structure can support the weight of the unit. If there is a risk that the structure cannot provide adequate support, reinforce the structure before installing the unit.

For bottom intake, replace the chamber lid in the procedure listed in fig.

1. Remove the chamber lid.
2. Reattach the removed filter in the orientation shown in Fig. 3.1.2, reattach the removed chamber lid in the orientation shown in Fig. 3.1.3, refer to Fig.3.1.3 for the direction of filter.

Installation

Suspension bolts

1. Consider the pipe direction, wiring, and maintenance carefully. choose the proper direction and location for installation.
2. Install the suspension bolts as shown in Fig. 3.2.1 below.

The position of the suspension bolts and the pipes

1. Mark the location of the suspension bolts, the refrigerant pipes, and the drain pipes.
2. The dimension are shown below.

Fig. 3.3 Suspension bolts

Install the indoor unit.
The installation of the indoor unit is shown in Fig. 3.4.

1. Secure the suspension bolts and the nuts As shown in the figures 3.5. The nuts are fixed using four bolts.
2. Install the indoor unit
   • As shown in the following figure, place the left hanger bracket on the nuts and washers of the suspension bolts.
   • Ensure that the left hanger bracket has been fixed on the nuts and washers securely. install the right hanger bracket suspension hook on the nuts and washers. (When installing the indoor unit, you can slightly remove the suspension bolts.)

Adjusting the unit level

1. Ensure that the foundation is flat, taking into account the maximum foundation gradient.
2. The unit should be installed so that the drainage side is slightly (0mm~5mm) lower than other sides for adequate drainage.
3. After the adjustment, tighten the nuts and apply the thread locker on the suspension to prevent the nuts from loosening.

CAUTION

1. During the installation, please cover the unit with plastic cover to keep it clean.
2. Make sure that the unit is installed level by using a level or a plastic pipe filled with water. Adjust the top surface of the unit to the surface of the water at both ends of the plastic pipe and adjust the unit horizontally.(If the unit is installed so that the slope is not in the direction of the drain piping, water leakage may occur.)

Installing the duct

CAUTION

• Make sure the external static pressure of the unit is within the range.
• Connect the duct and flange.
• Connect the duct and outlet flange.
• The connection of indoor unit and air duct must be well sealed and kept warm with insulation material.

Example

Indoor Unit Refrigerant Pipe

DANGER
Use the refrigerant according to outdoor nameplate. When carrying on the leakage check and test, do not mix in the oxygen, the acetylene and flammable and the virulent gas, for these gases are quite dangerous, and may possibly cause explosion. It is suggested that the nitrogen be used to perform these experiments.

The Pipe Material

1. Prepare the copper pipe on the spot.
2. Choose dustless, non-humid, clean copper pipe. Before installing the pipe, use nitrogen or dry air to blow away the tube dust and impurity.
3. Choose the copper pipe according to Fig. 4.1.

The Connection of the Pipe

1. The pipe diameter are shown in Fig. 4.1.
   Model| Gas Pipe(mm)| Liquid Pipe(mm)
   ---|---|---
   18K| φ12.7| φ6.35
   25/30K| φ15.88| φ9.52
   36/42/48/55K| φ19.05| φ9.52
2. As shown in Fig. 4.2, screw up the nuts with 2 spanners.
   Pipe size| Torque ( N · m )
   ---|---
   φ6.35mm| 20
   φ9.52mm| 40
   φ12.7mm| 60
   φ15.88mm| 80
   φ19.05mm| 100

Fig. 4.2 Tightening torque for the nut

3. After finishing connecting the refrigerant pipes, keep it warm with the insulation material.

CAUTION

• Pass the pipe through the wall with the end sealed.
• Do not place the pipes on the floor directly.

Drain Piping
Install the condensate drain piping

• Make sure the drain works properly .
• Prepare polyvinyl chloride pipe with a 1-1/4 in.(32mm) outer diameter.
• The diameter of drain pipe connection hole should be same as that of the drain pipe.
• Keep the drain pipe short and sloping down wards at a gradient of at least 1/100 to prevent air pockets from forming.

NOTE
When the relative humidity of inlet or ambient air exceeds 80%, install an (field-supplied) auxiliary drain pan under the indoor unit as shown below.

CAUTION
Water accumulating in the drain pipe can cause the drain to clog.

• To keep the drain pipe from sagging, space hanging wires every 1 to 1.5m.
• Insert the drain hose fully into the drain socket and firmly tighten the drain hose with warm-keeping material using the clamp.
• The two areas below should be insulated because condensation may happen there causing water leakage.
  1. Drain piping passing indoors
  2. Drain sockets
• Referring the figure below, insulate the drain socket and drain hose using the included large sealing pad.

CAUTION

Drain piping connections

• Do not connect the drain pipes directly to sewage pipes. Ammonia in the sewage might enter the indoor unit through the drain pipes and corrode the heat exchanger.
• Do not twist or bend the drain hose. Doing so applies excessive may damage the drain pipe and leakage.
• After piping work is finished, check if drainage flows properly.
• Gradually pour approximately 1000cc of water from the air outlet into the drain pan to check drainage flow.
• Check the drainage as shown below:

Electrical Wiring

General Check

CAUTION

• When clamping the wiring, use the included clamping material to prevent outside pressure being exerted on the wiring connections and clamp firmly.
• When doing the wiring, make sure the wiring is neat and does not cause the control box lid to stick up, then close the cover firmly. When attaching the control lid, make sure you do not pinch any wires.
• Outside the machine, separate the weak wiring(remote controller and transmission wiring) and strong wiring(earth and power supply wiring) at least 50 mm so that they do not pass through the same place together. Proximity may cause electrical interference, malfunction, and breakage.

WARNING
If the fuse blows, please call the service agency to replace it. Please do not replace it by yourself, or else it may result in accident, for example, shock.

• As shown in Fig. 6.1, remove the screws on the control box.
• Connect the power cord and earth wire to the main terminal.
• The remote control wire to the subsidiary terminal box.
• Connect the power supply of the indoor and outdoor units to the main terminal.
• Tie the wire in the control box with the clamp tightly.
• After finishing the wiring, seal the wiring hole with the sealing material (with the lid) to prevent the condensed water and insects entering.

Electrical Wiring Diagram

Change of Static Pressure
The static pressure can be freely adjusted by using specific wired controller.

Model

| The Range of Static Pressure|

Function Code Set

---|---|---

18/25K

|

0-50Pa

| 0-50, function code value equals static pressure value, more than 40 is 40 Pa, [default: 0 (35Pa)]

30/36K

|

0-150Pa

| 1-150, function code value equals static pressure value, more than 150 is 150 Pa, [default: 0 (47Pa)]
42/48/55K| 0-150Pa| 1-150, function code value equals static pressure value, more than

150 is 150 Pa, [default: 0 (60Pa)]

Static Pressure Setting (HCWA21NEHH):

1. Press and hold both “FUNCTION” and “MODE” buttons for 3 seconds, symbol “ALARAM” and parameter code start blinking at the same time.
2. Press “ / ” button to adjust parameter number until “17 ” is displayed, and press “CNFIRM” button to enter system parameter adaption state, symbol “ ALARAM ” stops blinking.
3. Select desired parameter code 10 by pressing “ / ” button, and press “CNFIRM” button to confirm.
4. Select desired function code to rewrite the parameter values by pressing “ / ” button, and press “CNFIRM” button to confirm.
5. Press “ ” button to quit.
   If you still have any trouble, please contact local service center of our company for further information.

Installation of the Outdoor Unit

Installation Sites

Avoid

• Direct sunlight
• Thick Oil fog
• Container With Flammable materials
• Near Heat Source/ventilation fan
• Aisle Or sideway
• Wet Or Uneven place

You should

• Place it in cool temperature.
• Place it in an area with good ventilation.
• Have required space for air inlet, outlet and maintenance. (Fig 7.1)
• Make a strong base (10X40cm board made of2 concrete or similar). The appliance should be placed not less than 10 cm high to avoid being wet or corroded. Otherwise, it may cause damage to the appliance or reduce its life time. (Fig 7.2)
• Fix the base with hook bolts to reduce vibration and noise.

If the total piping is longer than 5m, an additional refrigerant must be added. It is not necessary to add compressor oil.

Additional refrigerant charge Q(g):

• For 18K: Q=(L-5m)×12g/m
• For 25K~55K: Q=(L-5m)×28g/m

Installation of the Outdoor Unit
Firstly select the installation site and fix the outdoor unit. If it needs to be fixed onto the wall, make sure that the wall and the supporting rack is strong enough to hold the weight of the appliance.

Wiring instruction for outdoor unit

• Release the set screws of the electric cover, remove the electric cover (if the valve cover is there either, please release it).
• Connect the indoor unit wiring to the outdoor unit panel according to the electric wiring diagrams. Be sure to make each wire allowing 10cm longer than the required length for wiring.
• Ground the unit following local electrical regulations.
• Check the wiring with the wiring diagrams and make sure it is well connected. Fix the wiring with clips and reinstall the electric cover.
• Fix the unit with wire ropes to prevent overturning in case a seasonal strong wind blows against the unit.

Refrigerant Piping

Flaring with Pipe Expander
NOTE: A good flare will have the following characteristics:

• Inside surface is glossy and smooth.
• Edge is smooth.
• Tapered sides are of uniform length.
• Remove the burrs at the end of the copper pipe with a pipe reamer or file. When reaming, hold the pipe bend downwards and be sure that no copper scraps fall into the pipe. This process is important and should be done carefully to make a good flare. (Fig 8.1, 8.2)
• Mount the flare nut on the copper pipe.
• Make a flare at the end of copper pipe with a flaring tool. (Fig 8.3)

Connecting Piping between Indoor and Outdoor Units

• Be sure to apply a sealing cap or water-proof tape to prevent dust or water from getting into the pipes before they are used.
• Be sure to apply refrigerant lubricant on the surfaces of the flare and union before connecting them together to reduce gas leak effectively. (Fig 8.4)
• For proper connection, align the union pipe and flare pipe straight with each other, then tighten the flare nut lightly to obtain a smooth match. (Fig 8.5)
• Tighten the set screw with torque wrench to prevent leak of refrigerant. Carefully test for leakage before starting the appliance.

Heat Insulation of the Refrigerant Pipe
To avoid loss of heat and in prevention of the ground being wet by condensed water, all refrigerant pipes must be insulated with suitable insulating materials with minimum thickness of 6mm.(See Fig 8.6)

Sealing the Pipes

NOTE:
Do not bind the armoring tape too tightly because this will decrease the heat insulation effect. Also ensure that the condensed drain hose splits away from bundle and drips smoothly from the unit and the piping.

• The two refrigerant pipes (and electrical wire if local codes permit) should be taped together with white armoring tape. The drain hose may also be included and taped together as a bundle with the tubing.
• Wrap the tape from the bottom of the outdoor unit to the top of the piping where it enters the wall. As you wrap the piping, overlap half of each previous tape. (See Figure 8.7)
• Clamp the piping bundle to the wall, using one clamp approx. every 120cm.

Finishing the Installation
After completion of wrapping and insulation, seal the hole on the wall with suitable seal against wind and rain.

Vacuuming and Test Run

• Air and moisture remaining in the refrigerant system have undesirable effects.
• Therefore, they must be removed completely with the following steps.

Vacuuming with a Vacuum Pump (See Fig 9.1, Fig 9.2)

1. Check that each pipe (both narrow and wide pipes between the indoor and outdoor units) have been properly connected and all wiring for the test run has been completed. Note that both narrow and wide pipe valves on the outdoor unit are kept closed at this stage.
2. Using an adjustable wrench or box wrench, remove the bonnet from the service valve.
3. Connect a vacuum pump and service valve together tightly.
4. Turn on the vacuum pump with the pressure
5. lower than -0.1MPa (or -1 bar) for 5 minutes. With the vacuum pump still running, disconnect pipe of vacuum pump from the service valve. Then stop the vacuum pump.
6. Replace the bonnet on the service valve and fasten it securely with an adjustable wrench or box wrench.
7. Using an adjustable wrench or box wrench, remove the bonnet of both narrow and wide valve.
8. With the hex wrench, turn the wide and narrow pipe valves stem counter clockwise to fully open the valves.
9. Replace the bonnets on the wide and narrow valves and fasten it securely with an adjustable wrench or box wrench.

Leak Test
Leak test all joints and valves of the indoor unit and outdoor unit with liquid soap. Checking of the orifice cap should not be less than 30 seconds. Clean the liquid soap after the test to avoid color change or erosion of copper pipe.

Cleaning the Piping

• If the leak test turns out to be all right, preserve heat joints of the indoor unit.
• Straighten the connecting pipes and make them flush and fixed to the wall. Seal the space around the hole in the wall with gypsum through which the pipes come out.

Test Run
The trial should be carried out according to the installation and maintenance manual.

WARNING

• Only after all the check points have been checked the unit can be operated.
  • Check and make sure that the resistance of the terminal to ground is more than 2MΩ, otherwise, you cannot operate the unit before the electricity leakage point is found and repaired.
  • Check and make sure that the stop valve has been opened before operating the unit.
• Make sure that the power supply and the unit are fine before plugging into the power cord.
• Turn on the appliance and adjust it to cooling, dehumidifying according to the room temperature. Check if the appliance can operate smoothly.

Installation of the appliance is generally finished after the above operations are done. If you still have any trouble, please contact local technical service center of our company for further information.

Electrical Installation

WARNING:

• Use an ELB (Electric Leakage Breaker). If not used, it may cause an electric shock or a fire.
• Do not operate the system until all the check points have been cleared.
  • Check to ensure that the insulation resistance is more than 2MΩ, by measuring the resistance between ground and the terminal of the electrical parts. If not, do not operate the system until the electrical leakage is found and repaired.
  • Check to ensure that the stop valves of the outdoor unit are fully opened and then start the system.
• Do not touch any of the parts by hand at the discharge gas side, since the compressor chamber and the pipes at the discharge side are heated higher than 90℃.

Model

|

Power Supply

| ELB| Power Source Cable Size| Transmitting Cable Size|

Circuit Breaker (A)

---|---|---|---|---|---
Nominal Current (A)| Nominal Sensitive Current

(mA)

|

*EN60335-11**

|

*EN60335-11**

18K| 220-240V ~, 50Hz| 20| 30| 3×2.5mm²| 4×1.5mm²| 20
25K/30K| 220-240V ~, 50Hz| 25| 30| 3×2.5mm²| 4×1.5mm²| 25
36K| 220-240V ~, 50Hz| 40| 30| 3×4.0mm²| 4×1.5mm²| 40
42K(RAS-B42TFTSNAA)| 220-240V ~, 50Hz| 50| 30| 3×6.0mm²| 4×1.5mm²| 50
42K(RAS-B42TFTSMAA)| 380-415V 3N ~,50Hz| 32| 30| 5×2.5mm²| 4×1.5mm²| 32
48K/55K| 380-415V 3N ~,50Hz| 32| 30| 5×2.5mm²| 4×1.5mm²| 32

Max. Running Current(A): REFER TO NAMEPLATE

NOTES:

1. Follow local codes and regulations when selecting field wires, and all the above are minimum size.
2. The wire sizes in the table are selected at the maximum current of the unit according to the IEC60335-1 or regional standards. Use the wires which are not lighter than the ordinary polychloroprene sheathed flexible cord (code designation H07RN-F). When connecting the terminal block using flexible cord, make sure to use the round crimp-style terminal for connection to the power supply terminal block.
   • Place the round crimp-style terminals on the wires up to the covered part and secure in place.
   • When connecting the terminal block using a single core wire, be sure to perform curing.
3. When the transmitting cable exceeds 15 meters, a larger wire size should be selected.
4. Use a shielded cable for the transmitting circuit and connect it to ground.
5. If power cables are connected in series, add each unit maximum current and select wires below.

Selection According to IEC60335-1

If current exceeds 63A, do not connect cables in series.

Unpacking the unit instructions

Unpacking indoor unit

1. Remove tlJe packing cord and adhesive tape.
2. Renton tlte cornlflated paper carton, the corrugated paper boards, and cushions.
3. Rentcwe tha cushion and plastic bag.

Unpacking Outdoor unit

1. Remove the packing cord.
2. Remove the corrugated paper carton.
3. Remove the cushion, plastic bag, four screws and palletM

Install unit refer to USE AND INSTALLATION INSTRUCTIONS.
The symbols may be different from these models, but the functions are similar.

Specifications

Indoor unit

| Dimension| W×H×D| mm| 1180×190×447| 1180×190×447| 1140×268×720| 1140×268×720| 1300x350x800| 1300×350×800| 1300×350×800| 1300×350×800
---|---|---|---|---|---|---|---|---|---|---|---
Packing| W×H×D| mm| 1350×285×565| 1350×285×565| 1330×360×870| 1330×360×870| 1550×410×940| 1550×410×940| 1550×410×940| 1550×410×940
Weight| Net/Gross| kg| 23.5/29| 23.5/29| 35/40.5| 37.5/42.5| 53.5/62| 53.5/62| 53.5/62| 53.5/62

Outdoor unit

| Dimension| W×H×D| mm| 810×580×280| 860×670×310| 860×670×310| 950×840×340| 950×1050×340| 950×1050×340| 950×1386×340| 950×1386×340
Packing| W×H×D| mm| 940×640×420| 990×730×450| 990×730×450| 1110×920×460| 1110×1200×460| 1110×1200×460| 1110×1530×460| 1110×1530×460
Weight| Net/Gross| kg| 36.0/40.0| 49.0/53.0| 49.0/52.0| 70.0/75.0| 82.5/93.5| 81.0/92.0| 98.5/111.5| 103.0/115.0

Specifications in this document are subject to change without notice, in order that Hitachi-Johnson Controls Air Conditioning, Inc. may bring the latest innovations to their customers.

Hitachi-Johnson Controls Air Conditioning, Inc.

© 2023 Hitachi-Johnson Controls Air Conditioning, Inc. Printed in China.

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