emerio DH-124928.1 Dehumidifier Instruction Manual

emerio DH-124928.1 Dehumidifier Instruction Manual

Thank you very much for purchasing our products. In order to ensure correct operation, please read this manual and instruction 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 from 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 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. Before inserting the plug into the mains socket, please check that the voltage and frequency comply with the specifications on the rating label.
7. If an extension cord is used it must be suited to the power consumption of the appliance, otherwise overheating of the extension cord and/or plug may occur. There is a potential risk of injuries from tripping over the extension cord. Be careful to avoid dangerous situations.
8. Disconnect the mains plug from the socket when the appliance is not in use and before cleaning.
9. Ensure that the mains cable is not hung over sharp edges and keep it away from hot objects and open flames.
10. Do not immerse the appliance or the mains plug in water or other liquids. There is danger to life due to electric shock!
11. To remove the plug from the plug socket, pull the plug. Do not pull the power cord.
12. Do not touch the appliance if it falls into water. Remove the plug from its socket, turn off the appliance and send it to an authorized service center for repair.
13. Do not plug or unplug the appliance from the electrical outlet with a wet hand.
14. Never attempt to open the housing of the appliance, or to repair the appliance yourself. This could cause electric shock.
15. This appliance is not designed for commercial use. Indoor use only.
16. Do not use the appliance for other than intended use.
17. Do not wind the cord around the appliance and do not bend it.
18. Do not use this appliance in a window as rain may cause electric shock.
19. Disconnect the power if strange sounds, smell or smoke comes from it.
20. Switch off the appliance before changing its position.
21. Do not put heavy objects on the appliance.
22. Do not cover the intake or exhaust opening with cloths or towels.
23. Do not drink or use the water drained from the unit.
24. Do not take the water tank out during operation.
    • Empty the water tank before moving the unit to avoid water spilling
    • Do not tilt the unit to prevent water from spilling and damaging the machine.
    • Do not insert any foreign objects to enter any opening, as this may cause an electric shock, fire or damage to the appliance.
25. Do not put the unit close to heat-generating devices or near flammable and dangerous materials.
26. Never put your fingers or objects into the air inlet or air outlet.
27. Do not operate the dehumidifier in a closed area such as inside a closet, as it may cause a fire.
28. The appliance shall be installed in accordance with national wiring regulations.
29. Details of type and rating of fuses：AC250V,3.15A T or F.
30. Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants.
31. Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
32. 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.)
33. Do not pierce or burn.
34. Be aware that refrigerants may not contain an odour.
35. If the appliance is installed, operated or stored in an unventilated area, the room must be designed to prevent to 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.
36. The appliance must be stored in such a way as to prevent mechanical failure.
37. Regarding the instructions for repairing appliances containing R290, please kindly refer to below paragraphs.
38. To avoid any damage, place the appliance in an upright position for at least 24 hours before initiation.

Warning: Risk of fire / Flammable materials.
Read instruction manuals.
Operator’s manual; operating instructions.
Service indicator; read 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 10.1 m2 .

PARTS DESCRIPTION

1. Control panel
2. Handle
3. Air inlet and filter
4. Water tank
5. Air outlet
6. Continuous drainage outlet
7. Pump port (no function for this model)
8. Storage place for power cord and plug
9. Wheels

CONTROL PANEL

1. Standby button
2. Sleep mode button
3. Dehumidifying mode button
4. Speed button
5. Humidity setting button
6. Timer button
7. Child lock button
8. Fan mode button
9. Humidity indicator light
10. Timer indicator light
11. Child lock indicator light
12. Defrosting function indicator light
13. Sleep mode indicator light
14. Low fan speed indicator light
15. High fan speed indicator light
16. Water tank full / water tank not placed correctly
17. Auto dehumidifying mode indicator light
18. Low dehumidifying mode indicator light
19. High dehumidifying mode indicator light
20. Fan mode indicator light

DEFROSTING FUNCTION

The evaporator in the dehumidifier may defrost automatically and the defrosting function indicator light will be on. The default program is as below:

Room temperature ＜ 5℃: Defrosting function does not work.

5℃≤ Room temperature≤ 12℃: During dehumidifying, every 20 minutes, the appliance will switch to defrost mode for about 6 minutes. The compressor will stop working and the fan will run on high speed.
12℃＜ Room temperature≤ 16℃: During dehumidifying, every 25 minutes, the appliance will switch to  defrost mode for about 5 minutes. The compressor will stop working and the fan will run on high speed.
16℃＜ Room temperature: If the coil temperature is detected less than or equal to -1 ℃ continuously for 2 minutes, the defrost function will be on for 5 minutes. The compressor will stop working and the fan will run on high speed.

The room temperature increases during the operation.

This dehumidifier doesn’t have cooling function. It will produce heat during the operation and increase the room temperature by 1 to 4 ℃. This temperature rise may be very distinct in the cabinet or other similar spaces. In addition, the door and windows are closed and other appliances in the room can give out heat as well as the radiation of the sun can raise the room temperature.

Dehumidifying capacity

In the same room temperature, the dehumidifying capacity is higher in higher relative humidity and the dehumidifying capacity is lower in lower relative humidity. In the same relative humidity, the dehumidifying capacity is higher in higher temperature and the dehumidifying capacity is lower in lower temperature. The appliance is designed to remove uncomfortable humidity in daily life and to use for auxiliary drying of washed clothes indoors. This is not suitable for keeping the humidity very low.

BEFORE FIRST USE

• To avoid any damage, place the appliance in an upright position for at least 24 hours before initiation.
• After removing the packaging, make sure that the appliance is in good condition.
• Do not allow children to play with the packaging materials as there is risk of suffocation.

The appliance shall be installed on a flat surface where the air inlet/outlet would not be blocked. The required distance around the unit should be at least 30cm. To save energy, keep windows and door closed when the appliance is running.

Note: If the dehumidifier gets interference from the household appliances, such as television and radio cassette player, please keep the equipment away from the dehumidifier for over 70cm.

USE

Plug in the appliance. A “beep” sound will be heard. The appliance is on standby mode.

ON/off: Press the standby button to turn on the appliance. The air outlet cover will open automatically. The panel will show the current humidity. Press the button again, the appliance will be off. The air outlet cover will close automatically several seconds later.

Humidity setting : press the setting button to set your desired humidity level from 30%-80%. Each press will increase the humidity by 5% and after 80%, the figure will return to 30% for another circulation. The set humidity will flash several times in the panel, then environmental humidity will show. Humidity setting is only vaild under auto mode.

Fan: Press the fan mode button to enter into fan mode. Press the speed button to select low or high fan speed. The corresponding indicators will be on.

MODE: Press the mode button to select the mode: Auto mode, Low dehumidifying mode, High dehumidifying mode.

1. Auto mode: In this mode, the auto mode indicator lights up. Both fan speed and humidity can be adjusted under auto mode. The appliance will automatically maintain the select humidity.
2. Low dehumidifying mode: In this mode, the appliance works with low fan speed for any room humidity and the humidity cannot be changed. The environmental humidity is shown on the panel.
3. High dehumidifying mode: In this mode, the appliance works with high fan speed for any room humidity and the humidity cannot be changed. The environmental humidity is shown on the panel. The mode can be selected to dry clothes: Place the appliance in a room with closed doors along with the clothes rack.

TIMER

Auto-OFF setting

• When the appliance is ON, press the timer button to select a desired auto-OFF time from 1 to 24 hours.
• Each press will increase the set time by one hour and after 24 hours, the figure will return to 1 for another circulation. You can also long press the timer button for rapid adjustment.
• The timer will flash for several seconds, then the timer indicator light will illuminate still; The panel will show the environmental humidity. The timer setting is confirmed.
• The appliance will automatically turn off once the select time has passed

Auto-ON setting

• When the appliance is OFF, press the timer button to select a desired auto-ON time from 1 to 24 hours.
• The way to adjust the timer is the same as that of the auto-OFF setting.
• You can set your desired working mode at the same time.
• The appliance will automatically turn on with the set functions once the select time passed.

To cancel the timer, set the time to 0 hour; the timer will flash several times, then the timer indicator light will turn off.

CHILD LOCK

• Press and hold the button for about 3-5 seconds to lock all the other buttons in the panel.
• Press and hold the button again for about 3-5 seconds to unlock all the other buttons.

SLEEP MODE

• Press the sleep button to enter into the sleep mode; press the button again to exit the sleep mode.
• Under this mode, all indicators will be off except sleep indicator light and water tank full indicator light.

Notice

1. This appliance is equipped with memory function in case of power-down, except timer function.
2. Important:
   Fault code “E2”: Temperature / humidity sensor damaged; contact a professional for inspection and maintenance.
   Fault code “E3”: Coil sensor damaged; contact a professional for inspection and maintenance

DRAIN THE COLLECTED WATER

When the water tank is full, the water tank full indicator light will illuminate. The operation will stop automatically and the buzzer will beep 20 times to alert the user that the water needs to be emptied from the water tank.

Empty the water tank

1. Pull out the water tank from the appliance.
2. Discard the collected water.
3. Install the water tank back.

NOTE

1. If you want to remove the water tank cover (B), you should detach the handle (A) first: detach the joinpoint (a) of the handle (A) away from the slot (b). Pay attention to the direction of the slot (b).
2. When placing the water tank back, press the tank firmly into the place with both hands.
3. Do not remove the float from the water tank. The water full sensor will no longer be able to detect the water level correctly without the float and water may leak from the water tank..

Continuous water drainage

The appliance has a continuous drainage plughole. Firstly, gently knock the lid (A) off with a hammer (B), then connect the pipe (C); the condensed water can be continuously drained out. Install drain piping at a downhill grade to make sure that condensed water can be drained continuously. Now the condensed water will be drained out by this drainage plughole instead collected into the water tank.

CLEANING AND MAINTENANCE

The appliance must be regularly cleaned to prolong its life and keep it functioning properly.

Warning: Before performing any cleaning, turn off the unit and unplug it to avoid electrical shocks. Do not use hot water or chemical solvents for cleaning.

1. Regularly, clean the water tank with cold or warm water and dry with a soft cloth to avoid any mildew.
2. Clean the surface of the appliance using a moist cloth. Do not use detergents or abrasive sponges that can cause damage to the plastic surface.
3. Clean the filter as described in the following section.
4. When the unit will not be used for a long time:
5. Empty and dry the water tank, and then install it back.
6. Clean the filter.
7. Place the appliance upright and avoid the direct sunlight.

Filter

There is a filter net inside the appliance that must be removed and cleaned regularly. The dehumidity capacity may reduce when the filter net is clogged with defilement.

• Remove the filter net, detach the net (A) and filter case (C) to take out the activated carbon layer (B).
• The net and filter case can be washed in water (temperature < 40°C). Dry well before installation.
• The activated carbon layer cannot be cleaned in water. You may use a vacuum cleaner to remove the dust.

It is recommended that the activated carbon layer (B) be replaced every 3-6 months (depending on usage) to ensure peak performance of the appliance.

TROUBLE SHOOTING

Is     the    air     inlet     or     air     outlet

obstructed?

| Remove the obstruction from the air outlet

or air inlet.

Big noises| Whether the appliance is placed well| Place the appliance on a smooth and stable

floor

Stop  during the dehumidifying

process

| Whether the room temperature is out of the working scope of the

appliance

| The appliance may start automatically when the room temperature returns to the

working scope 5-32℃

The clothing cannot

be dried fast

| Whether the room temperature is

very low

| The wet clothing may dry more slowly in low temperature
Phenomenon| Cause
---|---
Intermittent stop during the

operation

| The defrosting
Small dehumidifying capacity| The dehumidifying capacity drops with the room temperature and humidity.
The humidity of the room cannot reduce| The room is too big

The door or windows of the room are not closed

The appliance is operated with other appliance which releases steam

Unpleasant small| The small may come from the wall, furniture or other things
The appliance makes a sound

during operation

| The sound made by the flowing of the refrigerant may eliminate or lower

automatically while the system operates stably

Water is in the tank| Since each appliance has taken operation test before leaving the factory, some water remains on the evaporator flows to the water tank

TECHNICAL DATA

GUARANTEE AND CUSTOMER SERVICE

Before delivery our devices are subjected to rigorous quality control. If, despite all care, 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 which 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 consequential 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 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 environmental safe recycling.

Migros-Genossenschafts-Bund
Limmatstrasse 152
CH-8031 Zürich

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 minimised. 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 minimise the risk of a flammable gas or vapour 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 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 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 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 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.

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 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.

9. 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:
   That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;

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

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, excessive number of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc

Ensure that apparatus is mounted securely. Ensure that seals or sealing materials have not degraded such that they no longer serve the purpose of preventing the ingress of flammable atmospheres. Replacement parts shall be in accordance with the manufacturer’s specifications.

NOTE: The use of silicon sealant may inhibit the effectiveness of some types of leak detection equipment. Intrinsically safe components do not have to be isolated prior to working on them.

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.

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.

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.

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.

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.

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 minimise the amount of refrigerant contained in them.
• Cylinders shall be kept upright.
• Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.
• Label the system when charging is complete (if not already).
• Extreme care shall be taken not to overfill the refrigeration system

Prior to recharging the system it shall be pressure tested with OFN. The system shall be leak tested on completion of charging but prior to commissioning. A follow up leak test shall be carried out prior to leaving the site.

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

Labelling

Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. The label shall be dated and signed. Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.

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

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 to show 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 – Safety of the appliance does not depend on ventilation of the housing. Switching off the appliance or opening of the housing has no significant effect on the safety. Nevertheless, it is possible that leaking refrigerant may accumulate inside the enclosure and flammable atmosphere will be released when the enclosure is opened.

Ventilated enclosure – Safety of the appliance depends on ventilation of the housing. Switching off the appliance or opening of the enclosure has a significant effect on the safety. Care should be taken to ensure a sufficient ventilation before.

Ventilated room – 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 the 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:

1. 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.
2. 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.
3. 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.
4. Decommissioning
   • If the safety is affected when the equipment is putted 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.
5. 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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