Shinco SPO6-07C 7000 BTU Portable Air Conditioner Instruction Manual

Shinco SPO6-07C 7000 BTU Portable Air Conditioner

Thank you for selecting this super quality air-conditioner. Please keep this User’s Manual properly for future reference. Read the User’s Manual carefully before operating this unit.

Important Safeguards

Important safeguards:

• This air-conditioner is suitable for indoor use only rather than for other occasions.
• Rated operating range: this unit shall be connected to 220-240V / 50Hz power output end.
• The air-conditioner shall be installed in accordance with the wiring rules of local grid t o ensure proper grounding. Should you have any question about electrical installation, follow the User’s Manual or have the installation done by professional electrician whenever necessary.
• Please put this unit in a flat and dry place and keep it at least 50 cm away from surrounding objects or walls.
• Once the air-conditioner is installed, ensure that the plug wire is in good condition and inserted firmly into the power socket and always ensure that the power cord is arranged in order to prevent the personnel from stumbling over it or the plug from being pulled out.
• Do not insert any object into the air inlet/outlet of the air-conditioner. Be sure to keep the air inlet/outlet of the air-conditioner unblocked.
• Where there is the need to install a drain pipe, ensure that the connection of the drain pipe is in good condition without flexure.
• When adjusting the horizontal/vertical louver at the air outlet, turn it slightly by hand to avoid damage of the louvre.
• Keep the unit in an upright position when moving it.
• Keep this unit away from gasoline, flammable gases, oven or other heat sources.
• Do not dismantle, inspect or modify the unit without authorization as this may result in fault of the unit, and even bodily injury & property damage; to avoid dangers, if the unit is faulty , be sure to have it repaired by the manufacturer or professionals.
• Do not install and operate this air-conditioner in a bathroom or other wet environments.
• Do not allow the children to play with this machine. Closely supervise the children o r disabled people when this unit is in use.
• Do not turn off this unit by removing the plug.
• Do not place such objects as cups on the unit to prevent water or other liquids from spilling into the air-conditioner.
• Do not use pest control aerosol or other flammable substances near the air-conditioner.
• Do not wipe or wash the air-conditioner with chemical solvents such as gasoline’s and alcohols, etc. Before cleaning the air-conditioner, be sure to turn off the power supply and wipe it with soft semi-wet cloth; if the machine is indeed very dirty, wipe it with neutral cleaner.

Recommendation:

Do not operate this unit if the ambient temperature is greater than 35°C in the cooling mode or lower than 5°C in the heating mode.

Function Description

This series of mobile air-conditioners are available in cooling only and cooling & heating models of different sizes. The cooling only models offer the cooling, dry, air blowing and sleep functions; the cooling & heating models offer the cooling, dry, air blowing and heating functions. The speed of the fan is adjustable between high fan speed and low fan speed, the temperature setting range is 16-300C, and various protection functions such as (24h) timed ON/OFF setting.

Features and Parts

Features

• Brand new appearance, compact structure with a sense of streamline.
• The appearance of the unit is beautiful and elegant; the remote control can be placed on the right of the handle at the back of the unit, and the remote control features user-friendly memory design.
• The structure of the power cord at the back and the universal jack design can better protect the power cord.
• The position of the outdoor connector is high to allow for convenient assembly and smooth air flow of the heat exhaust hose.
• Timed start/shutdown function, unique start/shutdown music.
• 3-minute delay compressor restart protection function, multiple other protection functions.
• The free snap-fit design of the heat exhaust hose allows for more convenient installation of the unit.

Parts

1. Control panel
2. Horizontal louvre
3. Vertical louvre
4. Air outlet frame
5. Vertical Louvre connecting lever
6. Caster
7. Top cap
8. Horizontal louvre connecting lever
9. Main vertical louver
10. Front shell
11. Handle position (right side: remote control storage area)
12. Back shell
13. C shape bucke of the heat exhaust hose snap
14. Power cord
15. Lower air duct bottom
16. Wire-winding post
17. Drain cap
18. Evaporator filter mesh
19. Evaporator filter frame
20. . Radiating fine mesh
21. Condenser filter mesh
22. Condenser filter frame
23. Base plate
24. Remote control
25. circular connector
26. Heat exhaust hose
27. Heat exhaust hose short connector
28. Window sealing board assembly
    

Installation Adjustment

Installation

Warning: leave this mobile air-conditioner in an upright position for at least 2 hours before first use.

This air-conditioner may be moved indoor conveniently; leave the air- conditioner in an upright position while moving it. The air-conditioner shall be placed on a flat ground surface. Do not install or operate this air- conditioner in a bathroom or other wet environments.

Installation of the C shape buckle of the heat exhaust hose and unit

1. Take out the C shape buckle of the heat exhaust hose and remove the plastic bag.

2. Point the rotary hole at the end of the heat exhaust hose snap toward the rotation shaft of the back shell and slide it onto the back shell in accordance with the snap joint direction of the rotation shaft on the back shell (as shown in Figure 1).
   Note: 1. When the end snap joint at the end of the rotation shaft of the back shell sticks out of the snap, it means that the heat exhaust hose snap has been sided into place.

3. Rotate the C shape buckle of the heat exhaust hose that is sided into place counterclockwise to clip the snap joint of the C shape buckle of the back shell successfully through the guide of the slide way of the back shell (as shown in Figure 2).
   Note: 1. Do not rotate the C shape buckle of the heat exhaust hose if it is not slided into place as this may damage the rotation shaft of the back shell and the C shape buckle of the heat exhaust hose.

Installation of the heat exhaust hose assembly and unit

1. Pull the end of the heat exhaust hose apart by several turns;

2. Hold the end handle of the C shape buckle of the heat exhaust hose with the left hand and the heat exhaust hose short connector with the right hand, put one end of the heat exhaust hose that is pulled apart onto the snap of the lower air duct bottom, press the C shape buckle of the heat exhaust hose with the left hand by force so that the C shape buckle of the heat exhaust hose clips the snap joint of the back shell (as shown in Figure 3).
   Note:

3. The end of the heat exhaust hose must reach one step inside the bottom of the lower air duct (as shown in Figure 4).

4. The few turns at the end of the heat exhaust hose must be snapped in the snap of the lower air duct bottom.

5. The C shape buckle that clips the heat exhaust hose must clip the back shell and heat exhaust hose firmly.
   

6. Hold the unit with one hand and the heat exhaust hose short connector with another hand; or both people cooperate with one person holding the unit and the other person pulling the heat exhaust hose to prolong the heat exhaust hose gently.
   Note:

7. Do not separate the heat exhaust hose assembly from the unit.

8. Do not tilt the unit when pulling apart the heat exhaust hose.

Installation of the window sealing board assembly

1. Half open the window and mount the window sealing board assembly onto the window, either vertically or horizontally (as shown in Figure 5 and 6).
2. Pull apart the parts of the window sealing board assembly, adjust the distance of the window sealing board assembly pulled apart so that the two ends of the assembly come into contact with the window frame, and fasten the parts of the assembly with copper screws.
   

Installation of the unit

1. Move the machine with the heat exhaust hose assembly installed before the window and keep the unit at least 50cm away from the walls or other objects. (As shown in Figure 7).
   
   

2. Snap the flat end of the heat exhaust hose short connector into the elliptical hole of the window sealing board assembly (as shown in Figure 8 and 9).
   Note

3. The flat end of the heat exhaust hose short connector must be snapped into place.

4. The heat exhaust hose may not be bent and shall be free from significant (greater than 45°) flexure, and the heat exhaust hose shall be ventilated properly.
   

Important notes:

The exhaust hose is 280mm-1500mm long and this length is determined based on the specification of the air-conditioner (s). Do not use prolonged hose or replace with other different hoses as this may affect the functions of the air-conditioner. The exhaust must be smooth and the air-conditioner may overheat if the exhaust is obstructed.

Control Setting

One. Operation instructions of the control panel

1. Select the operation interface depending on the models and functions. The operation interfaces is as follows:
   

Functions Setting

This portable air conditioner has three functions: cooling, dehumidifying and fan. Fan has two speeds: high speed and low speed, setting temperature is 16-30°C ( 61 ~ 86 °F) , 24 hours timer, sensor and water-level protective function.

Buttons: There six keys on the control panel: Power, Mode, Fan Speed, Timer, Up key and Down key.

• a). POWER Key: Press the key to start the unit, and press this key again to turn unit off.
• b). Mode Key: Set the Cooling, Dehumidifying and Fan Mode when unit is working or Timer-On Situation.
• c). Fan Speed: From pressing the button, fan speed change by low – high – low loop manner, but not available in dehumidifying mode.
• d). Timer Key: Can set the Timer-Off function in unit working situation, when setting the time. the Regular time indicator will illumine; can adjust the time again while the Regular time indicator will illumine; then it will display the room temperature again in the Off mode. Can also set in the Timer-On function. same as above setting. After the Timer-Off or the Timer-On, the timer indicator lights.
• e). Up\Down Key: Press this two key to set the desired room temperature.(Press the Up key once. the temperature will increase by 1 car 1 °F, also press the down key to decrease by 1°C or 1 °F), can also set the time in Timer Situation; can also exchange from °C to°F display by pressing these two keys at the same time.

the user wants to display the temperature in ·c, you can use the button on the remote
controller or press the up and down key simultaneously.

Operation instructions

• a) In the Cooling models:
  Ta > Ts+1 °c (1°F ), the cooling starting.
  Ta < Ts-1 °c (1°F), the compressor stops and only the fan motor remains working at
  the set fan speed.
  Ta: Room Surrounding Temperature Ts: Setting Temperature In the mode, pressing Timer and Down button can set sleep function, In sleep function, After operating two hours, the set temperature increases 1°C (1°F) automatically. After operating for another 2 hours, the set temperature will increase 1°C(1°F) again. Then, the set temperature will not change and the fan is forced to switch to low level.

• b) In the dry mode, if the ambient temperature ≥17°C (62°F), the compressor will start. Then, the unit is controlled in the following manner: when the ambient temperature ≤15°C(59°F), the compressor shuts down. When the ambient temperature rises to be ≥17°C (62°F), the compressor starts again. The start/stop of the compressor meets the requirement for 3-minute protection time.

• c). Under the fan mode, fans runs on both high speed or low speed. Temperature setting is in vain, unit just displays environment temperature between 10-35°C (50~95°F).

Timer setting

• a) Upon start, press the Timer button to enter timed shutdown. Upon shutdown, press this button to enter timed start. In the meanwhile, the timer indicator will illuminate.
  b) Press the Timer button to enter the timing function (timed start/timed shutdown ). Adjust the up or down button to set the timing time. The time will cycle in the order of 1－2－3－……24－0－1 hours or 24－23－22－……1－0－24 hours. The adjustment time of the timing function is relative time.

• c) After timed start is set, once the timed start time is reached, the unit will start. In the meanwhile, the timer indicator will extinguish and the ambient temperature is displayed.

• d) After timed shutdown is set, once the timed shutdown time is reached, the unit will shut down. In the meanwhile, the timer indicator will extinguish and the ambient temperature is displayed.

• e) Only the last setting of the timing function is valid and valid once only.

• f) ON/OFF operations caused by the button or remote control will clear all timing settings.

• g) Once the timing is determined, if the timer button is pressed once, it is possible to query the remaining timed start/shutdown time. If the timer button is pressed twice continuously within 5s, it is possible to cancel timing.

• h) The up button and down button may be used to change the set value of the temperature.

Two. Operation instructions of the remote control

The operation instructions of the buttons of this simple remote control are as follows:

1. Power button: press this button to turn on/off the unit;
2. Timer button: upon shutdown, press this button to set timed start; upon start, press this button to set timed shutdown.
3. High button : press this button to allow the unit to operate in the high fan speed stat e (except in the dry and sleep modes);
4. Low button : press this button to allow this unit to operate in the low fan speed state;
5. Up button: press this button to increase the temperature and timing value;
6. Down button: press this button to decrease the temperature and timing value;
7. °C -°F button: press this button to switch between the Celsius degree and Fahrenheit degree;
8. Cool button: press this button to set this unit to operate in the cooling mode;
9. Fan button: press this button to set this unit to operate in the air supply mode;
10. Dry button: press this button to set this unit to operate in the dry mode;
11. Sleep mode: press this button to set this unit to operate in the sleep mode.

Three. Multiple protection functions:

1. Anti-freeze protection function:
   Upon cooling, when the compressor operates continuously for more than 10 minutes, if the pipe temperature Tp is less than or equal to 2℃ continuously for 20 seconds, the compressor and water spraying motor turn off, other loads operate and LED displays E4, the unit initiates the anti-frost protection function and the buttons are inactive (except the OFF button). Once the pipe temperature rises to exceed or equal 8℃, the protection is relieved, the original status is restored and the unit meets the requirements for 3-minute delay protection of the compressor.

2. Full water protection function:
   When the water in the water tray exceeds the alarm level, the unit will alarm automatically and the full water indicator illuminates. In this case, you need to drain the condensate in the unit; otherwise, the unit will shut down automatically after the buzzer gives off 5 beeps. (For more information about the drain method, refer to the “Drain”). If the unit is not shut down manually, the unit will be restored to the previous operating status automatically once the water is fully drained. Or the power may be turned on again to start the unit.

3. Delay protection function of the compressor
   This unit offers restart protection for the compressor. Except that the compressor may start immediately when the unit is energized for the first time, there is 3-minute delay start protection after the compressor is shut down.

Water Drainage

Manual drain: (as shown in Figure 10)

1. Once the unit shuts down upon full water, turn off the power of the unit and then unplu g the power plug.
   Note: move the unit carefully to avoid spillage of water in the water tray at the bottom of the unit.

2. Put the vessel that holds water below the water outlet at the back of the unit.

3. Screw off the drain cap, unplug the water plug and water will flow into the vessel that holds water automatically.
   Note

4. Protect the drain cap and water plug properly.

5. Tilt the unit slightly backward when draining.

6. If the vessel that holds water can not hold all water in the unit, before the vessel that holds water is full of water, block the water outlet with the water plug as soon as possible to prevent the water from flowing onto the ground or carpe.

7. Once the water is fully drained, insert the water plug and screw on the water cap tightly.
   Note: 1. Turn on the unit only after the water plug and drain cap are installed properly; otherwise, the condensate of the unit will flow onto the ground or carpet.
   

Continuous drain:

1. Screw off the water cap in the direction shown by the arrow and unplug the water plug; (Figure 11)

2. Insert the OD 13mm PVC drain hose 8mm-10mm into the water outlet; (Figure 12)
   
   

3. Connect the drain hose to the WC or outdoor
   Note

4. The drain hose must be installed when there is not water in the baseplate;

5. When operating in the cooling mode, to ensure the water for radiation of the condenser of the unit and enhance the cooling effects of the unit, it is recommended that continuous drain not be set as far as possible when this unit is in use;

6. When operating in the heating mode, adopt continuous drain; otherwise, the unit may shut down due to full water;

7. Put the drain hose in an inaccessible place at a height not above the water outlet and keep the drain hose free from flexure;

8. When continuous drain is adopted, keep the drain cap and water plug properly.

Maintenance and Servicing

Prior to maintenance and servicing of the unit, turn off the power and unplug the plug.

1. Surface cleaning
   Clean the surface of the unit with wet soft cloth. Do not use chemical solvents such a s alcohol and gasoline; otherwise, the surface of the air- conditioner may be damaged and even the whole unit may be damaged.

2. Cleaning of the filter frame and filter mesh
   Clean the filter mesh once every two weeks. If the filter frame and filter mesh are clogged with dust, the function of the air-conditioner may decrease.

Cleaning of the filter frame and filter mesh

1. Grip the gripping position of the evaporator filter frame and the condenser filter frame and take out the filter frame gently in the direction shown by the arrow (as shown in Figure 13).

2. Grip the gripping position of the evaporator filter mesh and condenser filter mesh and take out the filter mesh gently in the direction shown by the arrow (as shown in Figure 14).
   
   Note: when taking out the filter frame or filter mesh, the force shall be applied evenly to avoid twisting or damage of the filter frame or filter mesh. Be sure to take out the filter frame first and then take out the filter mesh.

3. Put the evaporator filter frame, condenser filter frame, evaporator filter mesh, and condenser filter mesh into warm water (about 40 °C) to which neutral cleaner is added for cleaning and then dry them in the shade (as shown in Figure 15).
   
   Note: 1. Do not damage the mesh fabric on the filter frame and filter mesh.

Installation of the filter frame and filter mesh

Special note: be sure to install the filter mesh first and then install the filter frame.

1. To install the evaporator filter mesh and condenser filter mesh, point the back end of the filter mesh toward the socket and then push the filter mesh evenly and gently into the socket.

2. Note: Install the filter mesh in the reverse order of removal. The filter mesh must be installed into place; otherwise, the filter frame may not be installed into place.

3. Install the filter mesh gently so as not to damage it.

4. To install the evaporator filter frame and condenser filter frame, point the back end of the filter frame toward the socket and then push the filter frame evenly and gently into the socket.

5. Note: Install the filter frame in the reverse order of removal. Be sure to install the filter mesh first before the filter frame is installed.

6. Install the filter frame gently so as not to damage it

7. Cleaning of the handle position and remote control storage area

8. Take the remote control out of the remote control storage area in the direction shown by the arrow; (as shown in Figure 16)
   
   

9. Clean the handle position and remote control storage area of this unit with wringed wet soft cloth;
   Note: the wet soft cloth must be wringed out. Do not drip water into the unit.

10. If the remote control needs to be put back into the remote control storage area, put it back into the storage area in the reverse direction of removal.

Handling of the Unit

Handling and moving of the unit

1. To handle or move the unit, hold the top of the air outlet of the front shell with one hand and the handle position at the top of the back shell with another hand, and leave the unit in the upright position. (As shown in Figure 17).
   
   

2. Note: Do not hold the horizontal louvre by hand.

3. Leave the unit in the upright position when handling or moving it.

4. To handle or move the unit, drain the water in the unit first to prevent the water in the unit from flowing onto the ground or carpet.

5. If the remote control is in the position of the handle, take out the remote control.

End of Season Storage

1. Screw off the drain cap, unplug the water plug and drain the water in the water tray to another vessel that holds water.
   Note: the tilt angle of the unit shall not be greater than 30 degrees.

2. Start the unit, turn the mode to the low fan speed state of the air supply mode, keep this state for half a day and dry the interior of the unit to prevent mold.

3. Turn off the unit, unplug the power plug, wrap the power cord around the wire-winding post, insert the plug into the universal jack at the back shell of the unit; install the water plug and drain cap.

4. Remove the heat exhaust hose assembly and keep it properly.
   Note: to remove the heat exhaust hose assembly, hold the handle of the C shape buckle of the heat exhaust hose by hand, pull the C shape buckle outward evenly, rotate the C shape buckle of the heat exhaust hose clockwise once the buckle is separated from the snap position of the C shape buckle of the back shell and then take out the heat exhaust hose assembly.

5. Pack the air-conditioner properly with soft plastic bag, put the unit in a dry place & take appropriate dust-proof measures, and keep the unit out of the reach of children.

6. Take out the batteries of the remote control and keep it properly
   Note: ensure that the unit is put in a dry place. All accessories of the unit shall be protected properly.

Troubleshooting

Never repair or remove the air-conditioner yourself. Disqualified repair will void the warranty card and may cause harm to the removal personnel and property. If you encounter any of the problems listed in the table below or the recommended remedy does not work, contact the professional service agency.

and turn it on.
Full water indicator illuminates?| Drain the water stored in the unit.
Ambient temperature too low ?| It is recommended that this unit be operated at 10-35 ℃.
The room temperature is lower than the set temperature in the cooling mode.| Change the set temperature
Bad cooling or heating effects| There is direct sunlight| Draw the curtain on.
The doors and windows are open, the room is crowded or there are other heat sources in the cooling mode| Close the door and window and add new air- conditioners
Filter mesh very dirty| Clean or replace the filter mesh
Air inlet or air outlet clogged| Remove the obstruction
Large noise| Air-conditioner surface not put on a flat| Put the air- conditioner in a flat and firm place (may reduce noise)
The compressor does not work| Initiation of overheat protection.| Wait 3 minutes until the temperature decreases and then turn on the unit
The remote control does not work| Too long a distance| Bring the remote control close to the air-conditioner and ensure that the remote control points toward the receiving head of the remote control.
The remote control does not point toward the receiving head of the remote control
The batteries have no electricity| Replace the batteries
Display E1| Pipe temperature sensor failure| Check the pipe temperature sensor and related circuits
Display E2| Room temperature sensor failure| Check the room temperature sensor and related circuits
Display E4| Anti-freeze protection| Restore the functions automatically once defrozen.
Full water indicator illuminates| The water in the baseplate of the unit reaches the full water level| Drain the water in the baseplate.

Appendix

Fuse parameters
Model: FSD or 50F
Voltage: 250V
Current: 5.5A

Schematic diagram of the air-conditioner

For specific technical parameters of the models, refer to the nameplate on the product (s).

Disposal: do not store waste products with other non-classified wastes. Such wastes shall be stored separately for other special purposes.

Before Initiation

To avoid damage, place the unit in an upright position for at least 24 hours before initiation. Make sure that the air outlet and air inlet are never blocked. Only operate the unit on a horizontal surface to ensure no water leaks out.

Warnings

• Do not exceed impedance greater than 0.236ohm in supply the appliance is connected to. Failure to comply may lead the supply authority to impose restrictions to connection. Please consult your energy supply authority if the use of equipment exceeds 0.236 ohm.
• Any person who is involved with working on or breaking into a refrigerant a refrigerant circuit should hold a current valid certificate from an industry-accredited assessment authority. Which authorizes their competence to handle refrigerants safety in accordance with an industry recognized assessment specifications.
• Remember the environment when disposing of packaging around the appliance and when the appliance has reached its by date.
• A warning that the appliance shall be stored in a well-ventilated area where the size corresponds to the room area as specified for operation.
• The appliance shall be stored so as to prevent mechanical damage from occurring.
• Information for spaces where refrigerant pipes are allowed, including statements
  • that the installation of pipe-work shall be kept to a minimum;
  • that pipe-work shall be protected from physical damage and, in the case of flammable refrigerants, shall not be installed in an unventilated space;
  • that compliance with national gas regulations shall be observed;
  • that mechanical connections shall be accessible for maintenance purposes;
  • that, for appliances containing flammable refrigerants, the minimum floor area of the room shall be mentioned in the form of a table or a single figure without reference to a formula;
• A warning to keep any required ventilation openings clear of obstruction;
• A notice that servicing shall be performed only as recommended by the manufacturer;
• A warning that ducts connected to an appliance shall not contain a potential ignition source;
• When the portable air conditioner or dehumidifier is turned on, the fan can work continuously stable under normal conditions to provide the minimum air volume of 100m3/h even when the compressor is closed due to the temperature controller.
• Do not pierce or burn.
• Use only implements recommended by the manufacturer for defrosting or cleaning
• Do not perforate any of the components in the refrigerant circuit. Refrigerant gas may be odourless
• Use care when storing the appliance to prevent mechanical faults.
• Only persons authorized by an accredited agency certifying their competence to handle refrigerants in compliance with sector legislation should work on refrigerant circuit.
• All repairs must be carried out in accordance with the manufacturer’s recommendations.
• Maintenance and repairs requiring the assistance of other qualified personnel must be carried out under the supervision of specialists in the use of inflammable refrigerants.
• Do not perforate any of the components in the refrigerant circuit. Refrigerants may be odourless

Additional warning for appliance with R290 refrigerant gas (refer to the rating plate for the type of refrigerant gas used)

CAUTION ON FIRE

READ THE MANUAL CAREFULLY BEFORE USING THE APPLIANCE
R290 refrigerant gas complies with European environmental directives.
This appliance contains approximately 230g of R290 refrigerant gas Appliance shall be installed, operated and stored in a room with a floor area larger than 11 m2.

Instruction, Repairing Appliances Containing R290

1. Checks to there
   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 precaution shall be completed 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 works 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.

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 toxic or flammable atmospheres. Ensure that the leak detection equipment being used is suitable for use with all applicable 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 refrigerating 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 refrigerating system which involves exposing any pipe work 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 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 refrigerating 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 actual refrigerant charge 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;
   • refrigerating 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 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 no live electrical components and wiring are exposed while charging, recovering or purging the system;
   • that there is continuity of earth bonding.

10. Repairs to sealed components
    During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation.
    Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such a way that the level of protection is affected. This shall include damage to cables, excessive number of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc.
    Ensure that the apparatus is mounted securely.
    Ensure that seals or sealing materials have not degraded to the point 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.

11. Repair to intrinsically safe components
    Do not apply any permanent inductive or capacitance’s 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 beat 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.

12. 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.

13. 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.

14. Removal and evacuation
    When breaking into the refrigerant circuit to make repairs – or for any other purpose – conventional procedures shall be used. However, for flammable refrigerants 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 with inert gas;
    • open the circuit by cutting or brazing.
      The refrigerant charge shall be recovered into the correct recovery cylinders. For appliances containing flammable refrigerants, the system shall be purged with oxygen-free nitrogen to render the appliance safe for flammable refrigerants. This process may need to be repeated several times. Compressed air or oxygen shall not be used for purging refrigerant systems
      For appliances containing flammable refrigerants, refrigerant purging shall be achieved by breaking the vacuum in the system with oxygen-free nitrogen 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 oxygen-free nitrogen 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 pipework are to take place.
      Ensure that the outlet for the vacuum pump is not close to any potential ignition sources and that ventilation is available.

15. 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 in an appropriate position according to the instructions.
    • Ensure that the refrigerating 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 refrigerating system.
      Prior to recharging’s the system, it shall be pressure-tested with the appropriate purging gas. 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.

16. 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 recovered refrigerant. It is essential that electrical power available before the task 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 the cylinder is situated on the scales before recovery takes place.
      g) Start the recovery machine and operate in accordance with instructions.
      h) Don’t 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 refrigerating system unless it has been cleaned and checked.

17. Labelling
    Equipment shall be labelled stating that it has been decommissioned and emptied of refrigerant. The label shall be dated and signed. For appliances containing flammable refrigerants, ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.

18. 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 all appropriate refrigerants including, when applicable, 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.

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