PAC-127277 Portable Air Conditioner
Instruction Manual

Thank you very much for purchasing our products. In order to ensure correct operation, please read this manual and instructions carefully before use.

IMPORTANT INSTRUCTIONS

When using electrical appliances, basic precautions should always be followed to reduce the risk of fire, electric shock, burns, and other injuries.

1. Read and save these instructions. Attention: pictures in the IM are for reference only.

2. This appliance can be used by children aged 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning the use of the appliance in a safe way and understand the hazards involved.

3. Children shall not play with the appliance.

4. Cleaning and user maintenance shall not be made by children without supervision.

5. 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.

6. Indoor use only.

7. Do not use the unit in an area: near the source of fire; where oil is likely to splash; exposed to direct sunlight; where water is likely to splash; near a bath, laundry, a shower, or a swimming pool.

8. Never insert your fingers, rods into the air outlet. Take special care to warn children of these dangers.

9. Keep the unit upward while transport and storage, for the compressor, locate properly.

10. Before cleaning or moving the appliance, always turn off and disconnect the power supply.

11. To avoid the possibility of a fire disaster, the appliance shall not be covered.

12. All the air-conditioner sockets must comply with the local electric safety requirements. If necessary, please check it for the requirements.

13. The appliance shall be installed in accordance with national wiring regulations.

14. Details of type and rating of fuses: T, 250V AC, 3.15A.

15. Contact authorized service technician for repair or maintenance of this unit.

16. Do not pull, deform or modify the power supply cord, or immerse it in water. Pulling or misuse of the power supply cord can result in damage to the unit and cause electrical shock.

17. Compliance with national gas regulations shall be observed.

18. Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of a person competent in the use of flammable refrigerants.

19. Do not operate or stop the unit by inserting or pulling out the power plug, it may cause electric shock or fire due to heat generation.

20. Unplug the unit if strange sounds, smells, or smoke comes from it.

21. Always plug the appliance into an earthed plug socket.

22. In case of any damage, please turn off the switch, disconnect the power supply, and contact an authorized service center for repair.

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

24. 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.)

25. Do not pierce or burn.

26. Be aware that refrigerants may not contain an odor.

27. This appliance contains R290 refrigerant gas. R290 is a refrigerant gas that complies with the European directives on the environment. Do not puncture any part of the refrigerant circuit.

28. If the appliance is installed, operated, or stored in an unventilated area, the room must be designed to prevent the accumulation of refrigerant leaks resulting in a risk of fire or explosion due to ignition of the refrigerant caused by electric heaters, stoves, or other sources of ignition.

29. The appliance must be stored in such a way as to prevent mechanical failure.

30. Individuals who operate or work on the refrigerant circuit must have the appropriate certification issued by an accredited organization that ensures competence in handling refrigerants according to a specific evaluation recognized by associations in the industry.

31. Repairs must be performed based on the recommendation from the manufacturing company.
    Maintenance and repairs that require the assistance of other qualified personnel must be performed under the supervision of an individual specified in the use of flammable refrigerants.

32. Regarding the instructions for repairing appliances containing R290, please kindly refer to the below paragraphs.

33. Always let the appliance rest for at least 2 hours after moving it from one location to another.

Warning: Risk of fire / Flammable materials.
Read instruction manuals.
Operator’s manual; operating instructions.
Service indicator; read the technical manual.

Warning: Keep ventilation openings clear of obstruction.
Warning: The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as specified for operation.
The required distance around the unit should be at least 30cm.

Appliance shall be installed, operated, and stored in a room with a floor area larger than 4 m².

PARTS DESCRIPTION

Control panel & remote control

This unit has a remote control. One piece of CR2025 battery will be provided with the remote control. Before starting to use the remote control, remove the plastic protection from the battery. If you want to change the battery, please refer to the instruction behind the remote control. If it is not in use for a long time, please take the battery out of the remote control. Keep button cell batteries out of reach of small children.

INSTALLATION

• The unit shall be installed on a flat surface where the air outlet would not be blocked. The required distance around the unit should be at least 30cm.

• The unit shall not be installed in a laundry room.

• Extend the air exhaust hose by drawing out the two ends of the hose.

• Screw the air exhaust hose into the hose connector.

• Screw the other end of the air exhaust hose into the window adaptor.

• Insert the hose connector into the bracket on the back of the unit.

OPERATION

*Always let the appliance rest for at least 2 hours after moving it from one location to another.
Before use, check whether the exhaust hose has been mounted properly. Plugin the appliance. The louvers can be manually adjusted.

1. Power button
   Press the power button to turn on the appliance. The appliance will start to work.
   Press the button again, the appliance will be turned off.

2. Temperature/timer increasing button & temperature/timer decreasing button
   Press the button “+”/ “-” on the control panel or “ ”/“ ” on the remote control to set your desired room temperature from 15℃ to 31℃. The buttons can also be used for timer adjustment during the timer setting. The value will be increased/decreased by 1 (℃/hour) for each press.

3. Fan speed button
   Press the fan speed button to switch the fan speed between low and high. The corresponding indicator
   light “LOW”/ “HIGH” will illuminate.

4. Mode button
   Press the mode button to choose your desired working mode among COOL, DEHUM, and FAN. The corresponding indicator light will turn on when the specific mode is selected.
   • Cooling mode
   When the room temperature is higher than the set temperature, the compressor starts to run.
   When the room temperature is lower than the set temperature, the compressor stops and the fan operates at the original set speed.
   Note: When the compressor is working, the unit will vibrate slightly. This is normal and harmless.
   • Dehumidifying mode
   In dehumidifying mode, the fan runs at a low speed. The fan speed and temperature cannot be adjusted.
   The compressor will stop after 8 minutes of running and then run again after 6 minutes; it will repeat in this way.
   • Fan mode
   When the fan runs at the set speed, the compressor does not run.
   The adjustment of temperature in Fan mode is not effective.

5. Timer button

Auto-ON setting

• When the appliance is OFF, press the timer button, the timer indicator light will flash.

• Press the timer increasing or decreasing button to select a desired auto-ON time from 1 to 24 hours.
  The timer indicator light will flash for several seconds, then illuminate still; The digital display will be off.
  The timer setting is confirmed.

• You can choose the fan speed or mode at the same time.

• The appliance will automatically turn on once the selected time passed.

Auto-OFF setting

• When the appliance is ON, press the timer button, the timer indicator light will flash.

• Press the timer increasing or decreasing button to select a desired auto-OFF time from 1 to 24 hours.
  The timer indicator light will flash for several seconds, then illuminate still. The timer setting is confirmed.

• The appliance will automatically turn off once the select time has passed.

To cancel the timer, press the timer button, when the timer indicator light flashes press the timer button again.
The timer indicator light will then be off.

NOTE:

• The protective device may trip and stop the appliance in the conditions listed below.
  Cooling| The room temperature is over 43℃.
  ---|---
  The room temperature is below 15℃.
  Dehumidifying| The room temperature is below 15℃.
• If the appliance runs in cooling or dehumidifying mode with the door or window opened for a long time when relative humidity is above 80%, dew may drip down from the air outlet.

Drain water

1. Special reminder: There is condensing water recycling hidden in this appliance. The condensing water is partly kept recycling between the condenser and the water tray. When the water level rises to the upper level, the water-full code “E4” will be shown on the digital display to remind us of the draining water.
2. Please cut off the power supply, move the appliance to a suitable place, pull out the stopper in the drain port to drain the water completely. If conditions permit, you can also connect the drain hose to the drain port for the water draining.
3. After the draining, insert back the stopper into the drain port, otherwise, the appliance may leak and make your room wet.

Wi-Fi connection guide (The guide for the APP may not be updated regularly due to software version upgrades or other reasons. This  instruction is used as a guide only.):

1. Search “Tuya Smart” in App Store (for iOS) or Google Play (for Android), download the application “Tuya Smart” to your phone. Sign up or log in to your account on Tuya.

2. Make sure your appliance is on standby. Long press the mode button until a beep sound is heard. The WIFI indicator light will rapidly blink.

3. Press the “+” at the right top or button “Add Device” on the home page of Tuya to add your appliance.

4. Find the category of “Portable Air Conditioner”. Press its icon and you will get the prompt that asks you to use the 2.4GHz Wi-Fi network. Note that the  5 GHz Wi-Fi is not supported by this application.

5. Enter your Wi-Fi password and connect to the Wi-Fi. Confirm the WIFI indicator light rapidly blink, press “Next”, the application will scan and add the appliance.
   

6. When the appliance is added successfully, the WIFI indicator light will illuminate still.

7. Now, You can use the APP to operate the appliance.

Note:

• Press the mode button in APP, you will have “Cool, Dry and Fan”. Dry mode is the same as dehumidifying mode.
• Touch the temperature display to toggle Fahrenheit and Celsius.
• When the network environment for the appliance has been changed, it requires to be reconfigured.
• You can switch on/off the WIFI function by long-pressing the mode button on the control panel when the appliance is on standby. When the WIFI  indicator light rapidly blinks, the appliance is waiting to be paired.
  When the WIFI indicator light illuminates still, the Wi-Fi has been connected. When the WIFI indicator light goes out, the WIFI has been shut off.

CLEANING AND MAINTENANCE

• Before cleaning, be sure to disconnect the appliance from any electric supply outlet.
• Do not use gasoline or other chemicals to clean the appliance.
• Do not wash the appliance directly.
• If the appliance is damaged, please contact the dealer or repair shop.

Air Filter
If the air filters become clogged with dust/dirt, they should be cleaned once every two weeks.

• Pull out the air filters by the pull tab.
• Clean the air filters with neutral detergent in lukewarm water (< 40℃) and dry it up in the shade.
• Reinstall the air filter.

Clean the Surface
First, clean the surface with a neutral detergent and wet cloth, and then wipe it with a dry cloth.

TROUBLESHOOTING

The following cases may not always be a malfunction, please check the suggestions below before asking for service.

• Please wait for 3 minutes and start again, the protector device may be preventing the unit from working.
• If batteries in the remote controller are exhausted.
• If the plug is not properly plugged in.
Runs for a short while only| • If the set temperature is close to room temperature, you can lower the set temperature.
• The air outlet is blocked by obstacles. Take the obstacle away.
Water leak during moving| • Drain the condensate before moving.
• To avoid water leakage, please locate the unit on flat ground.
Does not run and the water full indicator “E4”| • Pull out the rubber plug to drain the water.
• If it is often in this state, please contact a qualified service technician.
Appliance automatically stops| • Timing shut down
• Set temperature reached

TECHNICAL DATA

Below is data for your operating reference

We, Emerio, declare under our sole responsibility that the product: PAC-127277 is in conformity with the essential requirements and other relevant requirements of the RED Directive (2014/53/EU)
The complete CE declaration is available at the following address: www.emerio.eu

ERP INFORMATION

| Value
---|---
Trademark| Emerio
Model identification| PAC-127277
Sound power (cooling)| 64dB(A)
Name of refrigerant| R290
Rated power input for cooling (kW)| 0.755
Rated energy efficiency ratio| 2.7
GWP (kgCO2eq)| 3
Energy efficiency class| A
Energy consumption for double ducts appliances (kWh/h)| –
Energy consumption for single duct appliances (kWh/h)| 0.755
Power consumption in thermostat-off mode (W)| –
Power consumption in standby mode (W)| 0.85
Cooling capacity| 7000BTU
Refrigerant leakage contributes to climate change. A refrigerant with lower global warming potential (GWP) would contribute less to global warming than a refrigerant with higher GWP if leaked into the atmosphere.
This appliance contains a refrigerant fluid with a GWP equal to 3. This means that if 1 kg of this refrigerant fluid would be leaked to the atmosphere, the impact on global warming would be 3 times higher than 1 kg of CO2, over a period of 100 years. Never try to interfere with the refrigerant circuit yourself or disassemble the product yourself and always ask a professional.

Energy consumption 0.755 kWh for model PAC-127277 in 60 minutes of use under

standard test conditions. The actual energy consumption depends on how the device is used and where it is located.For any additional information, please contact:
Emerio International AB
Smedjegatan 6
131 54 Nacka
Sweden

GUARANTEE AND CUSTOMER SERVICE
Before delivery, our devices are subjected to rigorous quality control. If, despite all care, the damage has occurred during production or transportation, please return the device to your dealer. In addition to statutory legal rights, the purchaser has an option to claim under the terms of the following guarantee:
For the purchased device we provide 2 years guarantee, commencing from the day of sale. If you have a defective product, you can directly go back to the point of purchase.
Defects that arise due to improper handling of the device and malfunctions due to interventions and repairs by third parties or the fitting of non-original parts are not covered by this guarantee. Always keep your receipt, without the receipt you can’t claim any form of warranty. Damage caused by not following the instruction manual, will lead to a void of warranty, if this results in inconsequential damages then we will not be liable.
Neither can we hold responsible for material damage or personal injury caused by improper use if the instruction manual is not properly executed? Damage to accessories does not mean free replacement of the whole appliance. In such case please contact our service department. Broken glass or breakage of plastic parts

is always subject to a charge. Defects to consumables or parts subjected to wearing, as well as cleaning, maintenance or the replacement of said parts are not covered by the warranty and are to be paid.

ENVIRONMENT-FRIENDLY DISPOSAL
Recycling – European Directive 2012/19/EU
This marking indicates that this product should not be disposed of with other household wastes. To prevent possible harm to the environment or human health from uncontrolled waste disposal, recycle it responsibly to promote the sustainable reuse of material resources. To return your used device, please use the return and collection systems or contact the retailer where the product was purchased. They can take this product for environmentally safe recycling.

THE BATTERY MUST BE RECYCLED OR DISPOSED OF PROPERLY. DO NOT OPEN. DO NOT DISPOSE OR IT IN FIRE OR SHORT CIRCUIT.

INSTRUCTIONS FOR REPAIRING APPLIANCES CONTAINING R290

Servicing

1. 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 shall be complied with prior to conducting work on the system.

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

3. General work area
   All maintenance staff and others working in the local area shall be instructed on the nature of the work being carried out. Work in confined spaces shall be avoided. The area around the workspace shall be sectioned off.
   Ensure that the conditions within the area have been made safe by control of flammable material.

4. Checking for the presence of refrigerant
   The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially flammable atmospheres. Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants, i.e. non-sparking, adequately sealed, or intrinsically safe.

5. Presence of a 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 CO₂ fire extinguisher adjacent to the charging area.

6. No ignition sources
   No person carrying out work in relation to a refrigeration system that involves exposing any pipework 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, removal, 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.

7. Ventilated area
   Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work. A degree of ventilation shall continue during the period that the work is carried out.
   The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.

8. 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 the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected;
   – Refrigeration pipes 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 that are inherently resistant to being corroded or are suitably protected against being so corroded.

9. Checks to electrical devices
   Repair and maintenance of electrical components shall include initial safety checks and component inspection procedures. If a fault exists that could compromise the safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are advised. Initial safety checks shall include:
   • That capacitor is discharged: this shall be done in a safe manner to avoid the possibility of sparking;
   • That there no live electrical components and wiring are exposed while charging, recovering, or purging the system;
   • That there is continuity of earth bonding.

Repairs to sealed components

1. 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.

2. 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, an 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 silicone sealant may inhibit the effectiveness of some types of leak detection equipment.
   Intrinsically safe components do not have to be isolated prior to working on them.

3. 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 currently permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while living 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.

4. 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.

5. 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.

6. 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 leakage of refrigerant is found which requires brazing, all of the refrigerants 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.

7. 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 the 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.

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

9. Decommissioning
   Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of reclaimed refrigerant. It is essential that electrical power is available before the task is commenced.
   a) Become familiar with the equipment and its operation.
   b) Isolate system electrically.
   c) Before attempting the procedure ensure that:
   • Mechanical handling equipment is available if required for handling refrigerant cylinders;
   • All personal protective equipment is available and being used correctly;
   • The recovery process is supervised at all times by a competent person;
   • Recovery equipment and cylinders conform to the appropriate standards.
   d) Pump down the refrigerant system, if possible.
   e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.
   f) Make sure that the cylinder is situated on the scales before recovery takes place.
   g) Start the recovery machine and operate in accordance with the manufacturer’s instructions.
   h) Do not overfill cylinders. (No more than 80 % volume liquid charge).
   i) Do not exceed the maximum working pressure of the cylinder, even temporarily.
   j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from the site promptly and all isolation valves on the equipment are closed off.
   k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.

10. 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.

11. Recovery
    When removing refrigerants 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 a pressure relief valve and associated shut-off valves in good working order. Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs. The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of flammable refrigerants. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained, and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release. Consult 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 and especially not in cylinders. If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant. The evacuation process shall be carried out prior to returning the compressor to the suppliers. Only electric heating to the compressor body shall be employed to accelerate this process. When oil is drained from a system, it shall be carried out safely.

Competence of service personnel
General
Special training additional to usual refrigerating equipment repair procedures is required when equipment with flammable refrigerants is affected.
In many countries, this training is carried out by national training organizations that are accredited to teach the relevant national competency standards that may be set in legislation.
The achieved competence should be documented by a certificate.
Training
The training should include the substance of the following:
Information about the explosion potential of flammable refrigerants shows that flammables may be dangerous when handled without care.
Information about potential ignition sources, especially those that are not obvious, such as lighters, light switches, vacuum cleaners, electric heaters.
Information about the different safety concepts:
Unventilated – The safety of the appliance does not depend on the ventilation of the housing. Switching off the appliance or opening the housing has no significant effect on safety. Nevertheless, it is possible that leaking refrigerant may accumulate inside the enclosure and a flammable atmosphere will be released when the enclosure is opened.
Ventilated enclosure – Safety of the appliance depends on the ventilation of the housing. Switching off the appliance or opening of the enclosure has a significant effect on safety. Care should be taken to ensure sufficient ventilation before.
Ventilated room – The safety of the appliance depends on the ventilation of the room. Switching off the appliance or opening of the housing has no significant effect on safety. The ventilation of the room shall not be switched off during repair procedures.
Information about the concept of sealed components and sealed enclosures according to IEC 60079-15:2010.
Information about the correct working procedures:
a) Commissioning

• Ensure that the floor area is sufficient for the refrigerant charge or that the ventilation hose is assembled in a correct manner.
• Connect the pipes and carry out a leak test before charging with refrigerant.
• Check safety equipment before putting into service.

b) Maintenance

• Portable equipment shall be repaired outside or in a workshop specially equipped for servicing units with flammable refrigerants.
• Ensure sufficient ventilation at the repair place.
• Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.
• Discharge capacitors in a way that won’t cause any spark. The standard procedure to short circuit the capacitor terminals usually creates sparks.
• Reassemble sealed enclosures accurately. If seals are worn, replace them.
• Check safety equipment before putting into service.

c) Repair

• Portable equipment shall be repaired outside or in a workshop specially equipped for servicing units with flammable refrigerants.

• Ensure sufficient ventilation at the repair place.

• Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.

• Discharge capacitors in a way that won’t cause any spark.

• When brazing is required, the following procedures shall be carried out in the right order:
  – Remove the refrigerant. If the recovery is not required by national regulations, drain the refrigerant to the outside. Take care that the drained refrigerant will not cause any danger. In doubt, one person should guard the outlet. Take special care that drained refrigerant will not float back into the building.
  – Evacuate the refrigerant circuit.
  – Purge the refrigerant circuit with nitrogen for 5 min.
  – Evacuate again.
  – Remove parts to be replaced by cutting, not by flame.
  – Purge the braze point with nitrogen during the brazing procedure.
  – Carry out a leak test before charging with refrigerant.

• Reassemble sealed enclosures accurately. If seals are worn, replace them.

• Check safety equipment before putting into service.

d) Decommissioning

• If safety is affected when the equipment is put out of service, the refrigerant charge shall be removed before decommissioning.
• Ensure sufficient ventilation at the equipment location.
• Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible.
• Discharge capacitors in a way that won’t cause any spark.
• Remove the refrigerant. If the recovery is not required by national regulations, drain the refrigerant to the outside. Take care that the drained refrigerant will not cause any danger. In doubt, one person should guard the outlet. Take special care that drained refrigerant will not float back into the building.
• Evacuate the refrigerant circuit.
• Purge the refrigerant circuit with nitrogen for 5 min.
• Evacuate again.
• Fill with nitrogen up to atmospheric pressure.
• Put a label on the equipment that the refrigerant is removed.

e) Disposal

• Ensure sufficient ventilation at the working place.
• Remove the refrigerant. If the recovery is not required by national regulations, drain the refrigerant to the outside. Take care that the drained refrigerant will not cause any danger. In doubt, one person should guard the outlet. Take special care that drained refrigerant will not float back into the building.
• Evacuate the refrigerant circuit.
• Purge the refrigerant circuit with nitrogen for 5 min.
• Evacuate again.
• Cut out the compressor and drain the oil.

Transportation, marking, and storage for units that employ flammable refrigerants
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.
Marking of equipment using signs
Signs for similar appliances 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.
Disposal of equipment using flammable refrigerants
See national regulations.
Storage of equipment/appliances
The storage of equipment should be in accordance with the manufacturer’s instructions.
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.

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