airconditioningcentre KFR-53IW-AG Air Conditioner User Guide

airconditioningcentre KFR-53IW-AG Air Conditioner

Product Information

The product is an air conditioner model available in different variants:

• Model No’s: KFR-23IW/AG, KFR-26IW/AG, KFR-33IW/AG, KFR-36IW/AG, KFR-53IW/AG, KFR-56IW/AG, KFR-63IW/AG, KFR-66IW/AG
• Refrigerant: R32

The user manual provides important safety precautions and instructions for installation, operation, and maintenance of the air conditioner. It is essential to follow these instructions to ensure safe and proper usage of the product.

Product Usage Instructions

Safety Precautions
Before operating the unit, read and follow the safety precautions listed below:

1. Ensure proper installation by a qualified Air Conditioning Installer according to the manufacturer’s specifications and requirements.
2. Observe all precautions mentioned in the manual to prevent injury or loss of life.
3. Establish an earth connection to avoid electric shocks.
4. Do not attempt to install the air conditioner yourself to avoid water leakage, electric shocks, or fire.
5. Use only specified parts to prevent equipment falling, water leakage, electric shocks, or fire.
6. Ensure a foundation of sufficient strength to prevent equipment falling and causing injury.
7. Use a dedicated power supply circuit with sufficient capacity to avoid electric shocks or fire.
8. Avoid using tapped wires or extension leads to prevent overheating, electric shocks, or fire.
9. Properly connect and secure wires to prevent abnormal heat build-up or fire.
10. Ensure the control box lid is securely fastened to avoid electric shocks, fire, or overheating terminals.
11. Avoid exposing the refrigerant to fire as it may produce toxic gas.
12. Keep the air conditioner away from sources of fire, such as fan heaters, stoves, or cookers.
13. Avoid the presence of air or foreign matter in the refrigerant circuit to prevent equipment damage and injury.

Installation and Maintenance

To install and maintain the air conditioner, follow these steps:

1. Ensure the system is installed correctly by a qualified Air Conditioning Installer according to the manufacturer’s specifications.
2. Refer to the circuit diagrams provided in the manual for proper installation.
3. Expel the air from the pipes according to the instructions provided.
4. Connect the power cables correctly following the instructions.
5. Regularly inspect and maintain the air conditioner as recommended in the manual.

Error Codes

The manual provides outdoor and indoor error codes for troubleshooting purposes. Refer to these codes and their explanations in case of any issues with the air conditioner.

Note: Failure to install correctly or follow the instructions may void the 12-month parts warranty.

Model No’s – KFR-23IW/AG, KFR-26IW/AG, KFR-33IW/AG, KFR-36IW/AG KFR- 53IW/AG, KFR-56IW/AG, KFR-63IW/AG, KFR-66IW/AG

Foreword

Air conditioners are units that should have the professional technicians do the installation for you. This Instruction Guide is the universal-purpose version for the models of split wall-mounted air conditioners manufactured by our Co. The appearance of the units that you purchase might be slightly different from the ones described in the Guide, but it does not affect your proper operations and usage. Please read carefully the sections corresponding to the specific model you choose, and keep the guide safe so that you can reference this at a later time. If the system is installed incorrectly, and as a result is not operating correctly or is damaged, it is the responsibility of the purchaser/installer. The supplier/manufacturer accepts no responsibility for failures caused by sub-standard or incorrect installations. This equipment must be installed by a qualified Air Conditioning Installer, please give this guide to your installer. This equipment should be installed correctly by professionally qualified technicians according to the manufacturer’s specifications and requirements. Please read the entire instructions before commencing, so the full process is understood before beginning. Failure to install correctly as set out in these instructions may render your 12 month parts warranty null & void.

Safety Precautions

Read the precautions in this manual carefully before operating the unit. This appliance is filled with R32 refrigerant.

• The precautions described herein are classified as WARNING and CAUTION. They both contain important information regarding safety. Be sure to observe all precautions without fail. Meaning of WARNING and CAUTION notices.
• WARNING Failure to follow these instructions properly may result in injury or loss of life.
• CAUTION Failure to observe these instructions properly may result in property damage or personal injury, which may be serious depending on the circumstances. • The safety marks shown in this manual have the following meanings:
• After completing installation, conduct a trial operation to check for faults and explain to the customer how to operate t he air conditioner and take care of it with the aid of the operation manual.
• The English text is the original instruction. Other languages are translations from the original.

WARNING

• Ask your dealer or qualified personnel to carry out installation work.
  Do not attempt to install the air conditioner yourself. Improper installation may result in water leakage, electric shocks or fire.

• Install the air conditioner in accordance with the instructions in this installation manual. Improper installation may result in water leakage, electric shocks or fire.

• Be sure to use only the specified accessories and parts for installation work.
  Failure to use the specified parts may result in the unit falling, water leakage, electric shocks or fire.

• Install the air conditioner on a foundation strong enough to withstand the weight of the unit. A foundation of insufficient strength may result in the equipment falling and causing injury.

• Electrical work must be performed in accordance with relevant local and national regulations and with instructions in this installation manual. Be sure to use a dedicated power supply circuit only. Insufficiency of power circuit capacity and improper workmanship may result in electric shocks or fire.

• Use a cable of suitable length. Do not use tapped wires or an extension lead, as this may cause overheating, electric shocks or fire.

• Make sure that all wiring is secured, the specified wires are used, and that there is no strain on the terminal Improper connections or securing of wires may result in abnormal heat build-up or fire.

• When wiring the power supply and connecting the wiring between the indoor and outdoor units, position the wires so that the control box lid can be securely fastened.
  Improper positioning of the control box lid may result in electric shocks, fire or over heating terminals.

• If refrigerant gas leaks during installation, ventilate the area immediately. Toxic gas may be produced if the refrigerant comes into contact with fire.

• After completing installation, check for refrigerant gas leakage. Toxic gas may be produced if the refrigerant gas leaks into the room and comes into contact with a source of fire, such as a fan heater, stove or cooker.

• When installing or relocating the air conditioner, be sure to bleed the refrigerant circuit to ensure it is free of air,and use only the specified refrigerant (R32). The presence of air or other foreign matter in the refrigerant circuit causes abnormal pressure rise, which may result in equipment damage and even injury.

• During installation, attach the refrigerant piping securely before running the compressor. If the refrigerant pipes are not attached and the stop valve is open when the compressor is run, air will be sucked in, causing abnormal pressure in the refrigeration cycle, which may result in equipment damage and even injury.

• During pump-down, stop the compressor before removing the refrigerant piping.
  If the compressor is still running and the stop valve is open during pump- down, air will be sucked in when the refrigerant piping is removed, causing abnormal pressure in the refrigeration cycle, which may result in equipment damage and even injury.

• Be sure to earth the air conditioner.
  Do not earth the unit to a utility pipe, lightning conductor or telephone lead. Imperfect earthing may result in electric shocks.

• Be sure to install an earth leakage breaker.
  Failure to install an earth leakage breaker may result in electric shocks or fire.

• During tests, never pressurize the appliances with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit).

• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.

• Install personnel and air conditioners to eliminate static electricity during air conditioning installation.

CAUTION

• Do not install the air conditioner at any place where there is a danger of flammable gas leakage. In the event of a gas leakage, build-up of gas near the air conditioner may cause a fire to break out.

• While following the instructions in this installation manual, install drain piping to ensure proper drainage and insulate piping to prevent condensation. Improper drain piping may result in indoor water leakage and property damage.

• Tighten the flare nut according to the specified method such as with a torque wrench. If the flare nut is too tight, it may crack after prolonged use, causing refrigerant leakage.

• Make sure to provide for adequate measures in order to pr e vent that the outdoor unit be used as a shelter by small animals.
  Small animals making contact with electrical parts can cause malfunctions, smoke or fire. Please instruct the customer to keep the area around the unit clean.

• The temperature of refrigerant circuit will be high, please keep the connecting pipework correctly insulated to avoid injury.

• The installation of the indoor unit and the connecting pipe is not allowed on the indoor side.

Selection of installation positions for indoor unit

• To be installed at the position where the air delivered from the unit can reach every corner of the room;
• To avoid being affected by the outdoor air;
• To avoid blockage to the air inlet or outlet of the unit;
• To avoid too much oil smoke or steam;
• To avoid possible generation, inflow, lingering or leakage of flammable gases;
• To avoid high-frequency facilities (such as high frequency arc welders, etc.);
• To avoid the places where acid solutions are frequently used;
• To avoid the places where some special sprayers (sulfides) are frequently used.
• Not to install on top of the musical instruments, TV,computer etc. valuable appliance. Not to install a fire alarming device near the air outlet of the unit (during operation, the fire alarm device might be erroneously triggered by the warm air from the unit);

Make sure of enough space for installation and maintenance.

• To take into consideration the operational convenience and safety in installation, it is recommended to ensure enough space between the unit and the walls.

Attention: If there are some additional function devices to install on the air conditioner, Be sure add to the installation space for the function devices.

Height limits of indoor and outdoor units.

• Either the indoor unit or the outdoor unit can be higher, but the height difference must comply the stated requirements.
• Try to reduce the bending of the piping line as much as possible so as to avoid possible negative impacts upon the performances of the units.

Selection of installation positions for outdoor unit

• To install the outdoor unit at the places which can stand the load of the machine weight and will not cause vibrations and noises;
• To install the unit at the places not to be exposed to rain or direct sunshine, and the places with good ventilation;
• The noises generated from the unit will not affect the neighboring places; Do not install the unit on non-metal frame;
• Not to install the unit at the places where there might occur the generation, inflow, stay or leakage of inflammable gases;
• Pay attention to the drainage of the condensed water from the base plate during operations;
• To avoid the air outlet being directly against the wind.

Detailed space requirements around the outdoor unit

Installation fixture of indoor unit

Pipelines can be connected in the directions of 1, 2, 3, 4, and 5 as indicated in Fig. 1. When the pipelines are connected to the directions of3, 4 and 5, a groove for the pipes has to be opened at the proper place on the base stand.

1. Installation of wall-mounting plate
   Fix the wall-mounting plate firmly on the wall with screws. Make sure of the leveling of the plate. Slanted wall-mounting plate might jeopardize the smooth discharge of the condensed water.

2. Drill holes on the wall Drill holes at places slightly below the wall-mounting plate, with hole diameter of 65mm(2-3/5″) and the outer edge of the hole 5-10mm(1/5-2/5″) lower (Fig.2) so that the condensed water can smoothly flow out. Cut the wall penetrating pipe to proper length according to the thickness of the wall (3- 5mm(1/10-1/5) longer than the wall thickness) and insert the pipe as indicated in Fig.2.

3. Installation of drain pipe Install the pipelines of the indoor unit in accordance with the direction of the wall holes. Wrap tightly the drain pipe and the pipelines with tape. Make sure that the drain pipe is underneath the pipelines. (Fig.3) (When the drain pipe passes the room interior, some condensed water might occur to its surfaces if the humidity is very high).

4. Installation of indoor unit Pass the connection wires, connecting pipelines and drain pipe through the wall hole. Hang the indoor unit on the hooks at the top of the wall-mounting plate so that the hooks at the bottom of the indoor unit match the hooks of the wall-mounting plate. (Fig.4)

Inspections:

• a. Check if the hooks at the top and bottom are firmly fixed.
• b. Check if the position of the master unit is properly leveled.
• c. The drain pipe should not curve upward (Fig.5).
• d. The drain pipe should be at the lower part of the wall pipes (Fig. 5).

Installation fixture of outdoor unit

• Try to ship the product to the installation location in its original package;
• As the gravity center of the unit is not at the installation center, special caution should be taken when using hoisting cables to lift it up;
• During shipping, the outdoor unit must not be slanted to over 45 degrees (Do not store the unit in a horizontal way).
• Use expansion bolts to fix the mounting supports on the wall;
• Use bolts and nuts to fix the outdoor unit firmly on the supports and keep on the same level;
• If the unit is installed on the wall or at the rooftop, the supports have to be firmly fixed so as to resist earthquake or strong wind.

Dimensions for parallel units installations

Ordinary pipelines connection & Air purging

Ordinary pipelines connection
No dust foreign articles, air or moisture should be allowed to enter the air conditioning system. Careful attention should be paid when pipeline connection for outdoor unit is made. Try to avoid repeated curves as much as possible, otherwise hardening or cracks might be caused to the copper pipes. Suitable wrenches should be used when the pipeline connection is done so as to ensure appropriate torque(refer to following torque Table 1). Excessive torque might damage the joints while too little torque might lead to leakage

Gas leakage inspection
After the pipeline connection is done, use a leakage inspection device or soap to carefully check if there is any leakage at the joints. This is an important step to ensure the quality of installation. If refrigerant gas leaks, ventilate the area immediately. Toxic gas may be produced if refrigerant gas comes into contact with fire. Never directly touch any accidentally leaking refrigerant. This could result in severe wounds caused by frostbite.

Pipeline connections and bending copper pipe

1. Remove the dust caps from the indoor and outdoor units, and the connecting pipe.
2. Align the joint counter of connecting pipe with the proper indoor and outdoor joint conic surfaces, tighten the connecting nut manually.Then,make it secure with a wrench as shown Fig.7,applying to above torque Table 1.

Bending the copper pipes
DO NOT USE a metric pipe bender as the pipes are imperial diameters and this will crush them as they will spread and be flattened! Do not use any internal bending springs as you will damage the pipe internally by chafing the copper.
The copper pipes take a little patience and care to bend suitable curves without crushing or kinking. There are 2 pipes; one is smaller than the other. The smaller is fairly soft and will bend reasonably easily to a gentle curve, be careful not to kink the pipe. All larger pipes require a bit more patience. First of all, cut around the insulation where you would like the bend and slide apart the insulation so you can see the copper pipe itself. Then working from the centre position of your required curve, placing your thumbs either side (much
like snapping a stick) be careful to ‘feel’ the pipe bending and stop as it starts depress. Move along slowly bending the pipes round in a controlled manner.

Expelling the air in the pipes and the indoor unit
Pay attention to exact timings – use a digital watch for more exact timing. You must expel the air from the system: moisture or damp air in the pipework will cause ‘sludging’ problems with the compressor by reducing efficiency and life expectancy of the system.

Follow the steps below precisely to avoid system failure.

• a) Take off the valve covers from the stop valve and T-branch valve.
• b) Take off the auxiliary cover from the T-branch valve.
• c) Turn the stop valve (on small pipe using a hexagon wrench (Allen key), anti clock-wise to an angle of 90 degrees (Quarter of a turn) keep open for 4-5 seconds and then CLOSE the valve fully.
• d) Check whether there is any refrigerant leakage from the pipe connections.
• e) Next, push the ‘tyre inflator’ style valve on the T-branch (Larger pipe side) for 3-4 seconds using a screwdriver or similar, to expel any left over air. CAUTION: Gas might be cold. If you notice a slight oily residue on the tip of the screwdriver this is normal, do not worry and do not push in for more than 5 seconds even if no oil is present.
• f) VERY IMPORTANT – Finally open the stop and T-branch valves with a Hexagon Key (Allen Key) fully anti clock-wise to allow the gas/ refrigerant to freely circulate around the system. They might be stiff, so be sure to open them fully and carefully. Then replace the 3 valve covers tightly.

Adding Refrigerant
Refrigerant must be added if the pipe measures more than 6 metres in length. This can only be added by a professional airconditioning engineer.

Please call for larger pipe sizes.

Connection of power cable

1. Remove the cover off the outdoor unit.
2. Connect the indoor power and control wires with the matched outdoor wires in accordance with the wiring diagram and make sure that the connection is firmly done (Fig.9.)
3. Use the press plate to fix the wires firmly, and re-install the Cover.
4. Optional steps: In some cooling and heating models, you should connect the indoor wire connector with outdoor probe wire connector for defrosting, see Fig.10.

Note : Do not connect the wires incorrectly, otherwise this may cause electrical damage to the unit. The appliance should be installed in accordance with national wiring regulations. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or simply qualified personnel only to avoid a hazard. The plug should be accessible after installing the appliance.

Finishing touches

• Wrap the piplines tightly with ethylene tapes (supplied).
• Fix the wrapped pipelines on the exterior wall with clamps or trunking.
• Fill in the gap in the wall left by the pipe to prevent rain-water and moisture from entering.

Test running

• Connect to the power source, check if the function selection keys on the remote controller are working properly.
• Check if the room temperature adiustments and timer settings are working properly.
• Check if the drain is smooth. Pour water into the drip tray and follow this through the drain.
• Check if there is any abnormal noise or vibration during operation.
• Check if there is leakage of refrigerant or an oily substance on any of the joints.

Is the unit installed correctly?

• Suitable Installation Position
• Is there anything which prevents ventilation or obstructs operation in front of the indoor unit? Do not install the unit following places.
• Inflammable gases may leak.
• Where oil splashes a lot.
• In a place where the unit is exposed to poisonous gases or where sultry gases are generated or sea breezes where corrosion is more common this may cause a fault with the unit.
• The indoor unit and remote need to be at least 1 metre or more away from anything that may intercept the signal. The drainage for the indoor unit must be gravity fed to a suitable place (guttering etc.)
• Pay attention to operation noise
• When installing the unit, choose a place which can stand the weight of the unit well and does not increase the operation noise or vibration. Especially where there is a possibility that vibration be transmitted to the house, fix the unit by inserting attached rubber anti-vibration plates under the feet of the outdoor unit.
• Choose the place where hot air and operation noise from the outlet of the outdoor unit do not annoy the neighborhood.
• Things left near the outlet and inlet of the outdoor unit cause malfunction or increased operation noise. Do not leave obstacles near the outlet and inlet.
• If irregular sound is heard during operation, consult with your distributor.

Inspection and Maintenance

• Check the indoor dust filters every 3 months, vacuum with a brush or wash in warm water with washing up liquid only, dry naturally.
• Check the outdoor unit and ensure no plants or leaves/ sticks etc. can obstruct the fan operating and that air can flow freely through the rear cooling fins. Wash the fins gently with a hosepipe to remove grit and dust that can collect on the fins. Isolate from power supply first and allow to dry before reconnecting.
• Your system should be serviced and refrigerant levels checked annually (for larger systems this may be required more often, by law, check with us first), please contact us to arrange this. If you have extended warranty, you MUST have an annual service to qualify for warranty.
• If you ever notice a reduction in cooling or heating efficiency, first check the filters, if they are clear, please contact us.

Switch off if any error codes occur and contact us immediately, otherwise further damage may occur which will be outside the scope of warranty. In wintertime you may notice steam rising from the outdoor unit during defrost, this is normal. It is also common for the outdoor unit to drip water in the winter; this is the moisture condensing on the cold copper coils. Please contact us if you have any doubts about the correct operation of your system. You must contact us first for any service or warranty issues, no unauthorized work should be carried out on your system, any such unauthorized work will not be paid by us and may invalidate any warranty.

IMPORTANT
Items to note:

• Fix the machine firmly; otherwise it may produce noise and vibration, or blow over in high winds.
• If using wall brackets for the outdoor unit, bolt the unit to the brackets securely, check all bolts and serviceability of brackets and all fixings often, service or replace as required to prevent bracket failure and injury or death. Air Conditioning Centre cannot accept any liability for damage to property or persons caused by insufficient servicing or checking fastness and safety of all components.
• Install the outdoor unit where it will not disturb your neighbor us. You may require planning permission in some areas, if in doubt always check first with your Local Council before proceeding.
• IMPORTANT: When switching between heating and cooling modes, switch off system for 3 minutes before changing the mode to allow the refrigerant to settle.
• When using heating mode, the indoor unit fan will not operate until sufficient heat has been generated by the outdoor unit, this may take several minutes initially each time heating is selected. Please be patient and wait for the indoor unit fan to operate and blow warm air.
• AUTO MODE is designed to keep the room at a rough ambient temperature using heating and cooling. This is more useful if you are leaving the room unattended and just want to keep it at an average temperature as it is not that precise for temperature accuracy. The idea is designed to use minimal electricity so the temperature range is +/- 5 degrees either way from where you have set it, this avoids the machine heating and cooling all day and ‘fighting’ itself using lots of power unnecessarily. You will find that if you are occupying the room then either cooling mode or heating mode will give a more accurate temperature.

Outdoor PCB Flashing LED Codes
Your system can display different error codes. These are generally used by our Engineers to determine the fault; here we have listed them below for your convenience.

Note: Above errors are for the outdoor PCB to match with the error displayed on the indoor unit.

Indoor Unit Error Codes

Here is a list showing the possible error codes that will display on your system if you have a fault. These are what the engineers use to identify and resolve your fault.

Note: If your error code is not displayed here do not worry, give us a call and we can help resolve the issue (See back of guide).

Circuit Diagrams

KFR-26/36/56/66YWIAG & KFR-23/33/53/63IW/AG Circuit Diagram Indoor Unit

KFR-26/36YW/AG & KFR-23/33IWIAG Circuit Diagrams Outdoor Unit

KFR-56YW/AG & KFR-53|W/AG Circuit Diagrams Outdoor Unit

KFR-66YW/AG & KFR-63IW/AG Circuit Diagrams Outdoor Unit

If you have any problems or you are unsure of anything please give us a call before installing.

For service or installation please call: 03703 344 345
Or alternatively email us: support@airconditioningcentre.com

Martin Industries Ltd
Unit 8 Milton Business Centre
New Milton
Hampshire
BH25 6RH

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