LG | ZPNQ48GTLA0.ANWBASA | LG ZPNQ48GTLA0.ANWBASA Owner’s Manual

ENGLISH
OWNER’S MANUAL R32
AIR CONDITIONER
Please read this manual carefully before operating
your set and retain it for future reference.
TYPE : FLOOR STANDING
www.lg.com
P/NO : MFL67649104
2
TIPS FOR SAVING ENERGY
ENGLISH
TIPS FOR SAVING ENERGY
Here are some tips that will help you minimize the power consumption when you use the air
conditioner. You can use your air conditioner more efficiently by referring to the instructions
below:
• Do not cool excessively indoors. This may be harmful for your health and may consume more
electricity.
• Block sunlight with blinds or curtains while you are operating the air conditioner.
• Keep doors or windows closed tightly while you are operating the air conditioner.
• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.
• Speed up the fan to cool or warm indoor air quickly, in a short period of time.
• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air conditioner is used for many hours.
• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block
the air flow or weaken the cooling / dehumidifying functions.
For your records
Staple your receipt to this page in case you need it to prove the date of purchase or for warranty
purposes. Write the model number and the serial number here:
Model name :
Serial number :
You can find them on a label on the side of each unit.
Dealer’s name :
Date of purchase :
IMPORTANT SAFETY INSTRUCTIONS
3
READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Always comply with the following precautions to avoid dangerous situations and ensure peak
performance of your product
! WARNING
It can result in serious injury or death when the directions are ignored
! CAUTION
It can result in minor injury or product damage when the directions are ignored
! WARNING
• Installation or repairs made by unqualified persons can result in hazards to you and others.
• Installation MUST conform with local building codes or, in the absence of local codes, with
the Nation Electrical Code NFPA 70/ANSI C1-1003 or current edition and Canadian Electrical
Code Part1 CSA C.22.1.
• The information contained in the manual is intended for use by a qualified service technician
familiar with safety procedures and equipped with the proper tools and test instruments.
• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death.
Flammable Refrigerant
• Be stored in a room without continuously operating ignition sources (for example: open
flames, an operating gas appliance or an operating electric heater.)
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odour.
• An unventilated area is installed shall be so constructed that should any refrigerant leak, it will
not stagnated so as to create a fire or explosion hazard.
• The appliance shall be stored in a well-ventilated area where the room size corresponds to the
room area as specified for operation.
• The appliance shall be stored in a room without continuously operating open flames (for example an operating gas appliance) and ignition sources (for example an operating electric
heater.)
Installation
• Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit.
There is risk of fire or electric shock.
• For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized Service
Center. Do not disassemble or repair the product. There is risk of fire or electric shock.
• Always ground the product. There is risk of fire or electric shock.
• Install the panel and the cover of control box securely. There is risk of fire or electric shock.
• Always install a dedicated circuit and breaker. Improper wiring or installation may cause fire or
electric shock
• Use the correctly rated breaker or fuse. There is risk of fire or electric shock.
ENGLISH
IMPORTANT SAFETY INSTRUCTIONS
4
IMPORTANT SAFETY INSTRUCTIONS
ENGLISH
• Do not install, remove, or re-install the unit by yourself (customer). There is risk of fire, electric
shock, explosion, or injury.
• Be cautious when unpacking and installing the product. Sharp edges could cause injury. Be
especially careful of the case edges and the fins on the condenser and evaporator.
• For installation, always contact the dealer or an Authorized Service Center. There is risk of
fire, electric shock, explosion, or injury.
• Do not install the product on a defective installation stand. It may cause injury, accident, or
damage to the product.
• Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury.
• Do not let the air conditioner run for a long time when the humidity is very high and a door or
a window is left open. Moisture may condense and wet or damage furniture.
Operation
• Take care to ensure that power cable could not be pulled out or damaged during operation.
There is risk of fire or electric shock.
• Do not place anything on the power cable. There is risk of fire or electric shock.
• Do not plug or unplug the power supply plug during operation. There is risk of fire or electric
shock.
• Do not touch(operate) the product with wet hands. There is risk of fire or electric shock.
• Do not place a heater or other appliances near the power cable. There is risk of fire and electric shock.
• Do not allow water to run into electric parts. There is risk of fire, failure of the product, or electric shock.
• Do not store or use flammable gas or combustibles near the product. There is risk of fire or
failure of product.
• Do not use the product in a tightly closed space for a long time. Oxygen deficiency could occur.
• When flammable gas leaks, turn off the gas and open a window for ventilation before turning the
product on. Do not use the telephone or turn switches on or off. There is risk of explosion or fire
• If strange sounds, or smell or smoke comes from product. Turn the breaker off or disconnect
the power supply cable. There is risk of electric shock or fire.
• Stop operation and close the window in storm or hurricane. If possible, remove the product
from the window before the hurricane arrives. There is risk of property damage, failure of
product, or electric shock.
• Do not open the inlet grill of the product during operation.(Do not touch the electrostatic filter,
if the unit is so equipped.) There is risk of physical injury, electric shock, or product failure.
• When the product is soaked (flooded or submerged), contact an Authorized Service Center.
There is risk of fire or electric shock.
• Be cautious that water should not enter the product. There is risk of fire, electric shock, or
product damage.
• Ventilate the product from time to time when operating it together with a stove, etc. There is
risk of fire or electric shock.
• Turn the main power off when cleaning or maintaining the product. There is risk of electric
shock.
• When the product is not to be used for a long time, disconnect the power supply plug or turn
off the breaker. There is risk of product damage or failure, or unintended operation.
• Take care to ensure that nobody should step on or fall onto the outdoor unit. This could result
in personal injury and product damage.
IMPORTANT SAFETY INSTRUCTIONS
5
• Always check for gas (refrigerant) leakage after installation or repair of product. Low refrigerant levels may cause failure of product.
• Install the drain hose to ensure that water is drained away properly. A bad connection may cause
water leakage.
• Keep level even when installing the product. To avoid vibration or water leakage.
• Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods. It may cause a problem for your neighbors.
• Use two or more people to lift and transport the product. Avoid personal injury.
• Do not install the product where it will be exposed to sea wind (salt spray) directly. It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause
product malfunction or inefficient operation.
Operation
• Do not expose the skin directly to cool air for long periods of time. (Don't sit in the draft.) This could
harm to your health.
• Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system. There is risk of damage or loss of property.
• Do not block the inlet or outlet of air flow. It may cause product failure.
• Use a soft cloth to clean. Do not use harsh detergents, solvents, etc. There is risk of fire, electric
shock, or damage to the plastic parts of the product.
• Do not touch the metal parts of the product when removing the air filter. They are very sharp! There
is risk of personal injury.
• Do not step on or put anything on the product. (outdoor units) There is risk of personal injury and
failure of product.
• Always insert the filter securely. Clean the filter every two weeks or more often if necessary. A dirty
filter reduces the efficiency of the air conditioner and could cause product malfunction or damage.
• Do not insert hands or other objects through the air inlet or outlet while the product is in operation.
There are sharp and moving parts that could cause personal injury.
• Do not drink the water drained from the product. It is not sanitary and could cause serious health issues.
• Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal
injury.
• Replace all the batteries in the remote control with new ones of the same type. Do not mix old and
new batteries or different types of batteries. There is risk of fire or explosion
• Do not recharge or disassemble the batteries. Do not dispose of batteries in the fire. They may burn
or explode.
• If the liquid from the batteries gets onto your skin or clothes, wash it well with clean water. Do not
use the remote if the batteries have leaked. The chemicals in batteries could cause burns or other
health hazards.
• If you eat the liquid from the batteries, brush your teeth and see doctor. Do not use the remote if
the batteries have leaked. The chemicals in batteries could cause burns or other health hazards.
ENGLISH
! CAUTION
Installation
6
TABLE OF CONTENTS
ENGLISH
TABLE OF CONTENTS
2
3
TIPS FOR SAVING ENERGY
IMPORTANT SAFETY INSTRUCTIONS
7
BEFORE USE
7
7
7
7
Preparing for operation
Usage
Cleaning and maintenance
Service
8
8
9
10
11
PRODUCT INTRODUCTION
Name of parts
Indoor unit controls and indicators
Wireless remote controller
Remote control preparation
12 OPERATING INSTRUCTIONS
12
12
12
12
13
13
13
13
14
14
Cooling Mode
Auto cleaning button
Airflow Setting
Fan Speed Mode
Dehumidification Mode
Power Cooling Mode
Blowing Mode
Simple Reservation
Child Lock Operation Function
Auto Re-Operation Function
15 MAINTENANCE AND
SERVICE
15
16
16
17
17
18
Indoor Unit
When the air conditioner is not going
to be used for a long time.
Operation Tips
Call the service immediately in the following situations
Troubleshooting Tips! Save time and
money!
Caution! Flammable Refrigerant.
BEFORE USE
7
Preparing for operation
• Contact an installation specialist for installation.
• Use a dedicated circuit.
Usage
• Being exposed to direct airflow for an extended period of time could be hazardous to your
health. Do not expose occupants, pets, or plants to direct airflow for extended period of time.
• Due to the possibility of oxygen deficiency, ventilate the room when used together with stoves
or other heating devices.
• Do not use this air conditioner for non-specified special purposes (e.g. preserving precision devices, food, pets, plants, and art objects). Such usage could damage the items.
Cleaning and maintenance
• Do not touch the metal parts of the unit when removing the filter. Injuries can occur when handling sharp metal edges.
• Do not use water to clean inside the air conditioner. Exposure to water can destroy the insulation, leading to possible electric shock.
• When cleaning the unit, first make sure that the power and breaker are turned off. The fan rotates at a very high speed during operation. There is a possibility of injury if the unit’s power is
accidentally triggered on while cleaning inner parts of the unit.
Service
For repair and maintenance, contact your authorized service dealer.
ENGLISH
BEFORE USE
8
PRODUCT INTRODUCTION
ENGLISH
PRODUCT INTRODUCTION
Name of parts
Indoor unit
Outdoor unit
1. Left/Right Airflow Control Louver
2. Up/Down Airflow Control Louver
3. Display/Control Panel
4. Filter
5. Air Inlet
6. Control Box
1
1. Air Outlet
2. Air Inlet (rear, side)
3. Bottom plate
2
2
3
1
4
5
6
3
PRODUCT INTRODUCTION
ENGLISH
Indoor unit controls and indicators
2
1
3
5
7
6
9
8
10
4
11
12
13
14
17
15
16
1. Fan mode operation lamp
10. Left/Right air flow lamp
2. Cooling operation lamp
11. Start/Stop button
3. Dehumidification operation lamp
12. Operation mode selection button
4. Auto operation lamp
13. Power cooling mode button
5. Power cooling operation lamp
14. Room temperature setting button
6. Outdoor unit operation/Auto
cleaning/Timer/Child lock lamp
15. Indoor fan speed button
7. Room temp. / Set temp. display
(ON/OFF timer display)
8. Indoor fan speed lamp
9. Up/Down air flow lamp
16. Air flow direction button
17. Signal receptor
9
10 PRODUCT INTRODUCTION
ENGLISH
Wireless remote control
No.
1
Control
panel
1
2
5
3
4
6
7
8
9
10
11
12
13
2
Description
Remote control operation lamp
|
Power ON/OFF button : Operation will
start when this button is pressed, and
stop when the button is pressed again.
3
Indoor fan speed button : To select the
desired fan speed.
4
Temperature setting button
5
A
Auto cleaning button
6
7
8
Cooling button
D
Dehumidification button : Can effectively
remove humidity when at the time of
rainy season or high humidity.
C
Auto operation button : In operation this
function, air conditioner control the setting temperature by comparing room
temperature and hot or cool level customer set
9
Fan mode button
10
Air flow direction button(Up/down,
Left/right) : Adjust air flow direction vertically or horizontally.
11
Power cooling mode button : Powerful
cooling is performed
12
ON/OFF timer setting button : Set the
time of starting or stopping
13
Timer cancel button
Handling the remote control
- Aim at the signal receptor on the floor standing type air
conditioner when operating.
- The remote control signal can be received at a distance
of up to about 7 meters.
- Be sure that there are no obstructions between the remote control and the signal receptor.
- Do not drop or throw the remote control.
- Do not place the remote control in a location exposed to
direct sunlight, next to heating unit, or other heat
sources.
11
ENGLISH
Remote control preparation
How to mount onto a wall
1 Use the screws to secure the holder to the
wall or attach the holder side of indoor
unit.
2 To insert the remote control to the holder.
- Do not use rechargeable batteries such batteries are different from standard dry cells in
shape, dimensions, and performance.
- Change the batteries with a new one if the
remote control does not work properly after
using for an extended period of time.
! CAUTION
How to insert batteries
1 Remove the cover from the back of the remote control.
- Slide the cover according to the arrow direction.
2 Insert two batteries.
- Be sure that the (+) and (-) directions are
correct.
- Be sure that both batteries are new.
3 Re-attach the cover.
- Slide the cover into back position.
• When not using remote control for a
long time, flowing of dry cell liquid may
cause the failure of product, therefore,
remove all dry cells.
• When replacing dry cell (AAA), replace
two of them all with new ones, and if remote control is not operated properly
even after replacing the dry cells (AAA),
request the service.
• Do not disassemble or re-charge the
used dry cells, and do not throw away
those at the location with heat of fire or
hot air. There will be the danger of explosion.
12 OPERATING INSTRUCTIONS
ENGLISH
OPERATING INSTRUCTIONS
Cooling Mode
Airflow Setting
1 Press | button to turn on the indoor.
We can simply adjust the desired airflow direction.
2 Press a button to select Cooling opera-
tion mode.
- When canceling operating, press | button once more.
3 Adjust the desired temperature by pressing (
) buttons.
- If desired temperature is higher than
room temperature, cooling cannot be conducted.
- Set the temperature lower than the room
temperature
- Setting Temp Range : 18 °C~30 °C.
!
NOTE
What is 3 minutes delay function?
The reason that cold wind is not coming out
when operating the unit after turning off the
cooling is because of the function to protect
compressor. Cold wind will be coming out
when compressor is operated after 3 minutes.
Up/Down Airflow Direction Control
1 Press | button to turn on the indoor.
2 Press I button and the louvers will swing
up and down.
3 PressI button again to set the horizontal
louver at the desired airflow direction.
Left/Right Airflow Direction Control
1 Press | button to turn on the indoor.
2 Press J button and the louvers will
swing left and right.
3 Press J button again to set the vertical
louver at the desired airflow direction.
<Airflow Setting Table>
Symbol
I
Description
Up·Down : Vane move from up to
down automatically and continuously
Auto cleaning button
: Vane move from left to
J Left·Right
right automatically and continuously
In the cooling and dehumidifying operations,
moisture is generated inside the indoor unit.
Use the auto cleaning function to remove
such moisture
Fan Speed Mode
1 Press | button to turn on the indoor.
2 Press
button.
is displayed on the display screen.
-
- If you turn off the power, the fan
operates for 3 minutes and cleans the inside
of the indoor unit.
!
NOTE
Some buttons cannot be used while the
auto cleaning function is in operation.
1 Press | button to turn on the indoor.
2 Press
button to select fan speed.
- You can select the fan speed in four
steps low, mid, high, super high. Each
time the button is pressed, the fan speed
mode is shifted
- Air flow rate can be selected during the
cooling, dehumidification, blowing, and
auto operation mode.
OPERATING INSTRUCTIONS 13
In rainy season or high humidity climate, it is
possible to operate simultaneously dehumidifier and cooling mode to remove humidity effectively.
- The temperature established by customer
will be maintained through automatic performance of cooling operation in accordance with the change of room
temperature.
1 Press | button to turn on the indoor.
2 Press c button to select dehumidification
mode
- Room temperature will be displayed after
desired temperature is indicated at display section for about 5 seconds.
Power Cooling Mode
Strong cooling will be conducted in short time.
1 Press | button to turn on the indoor.
2 Press
button to operate power cooling
- When power cooling button is pressed
during cooling/dehumidification mode,
power cooling will be operated. In power
cooling mode, desired temperature is set
to 18 °C and the horizontal louver is fixed
at the highest position.
Fan Mode
1 Press | button to turn on the indoor.
button to circulate indoor air.
- When canceling operation, press | button once more.
- During fan mode, outdoor fan and compressor will not be operated.
Auto Operation Mode
1 Press | button to turn on the indoor.
2 Press 2 button to select Auto Operation
Mode.
3 Adjust the desired temperature by pressing (
Turning ON reservation mode
This function is able to turn on unit after a setting time.
1 When the unit is turned off, adjust desired
setting time with
button.
- Up to the maximum of 24 hours can be
selected.
Turning OFF reservation mode
This function is able to turn off unit after a setting time.
mode.
2 Press
Simple Reservation
) buttons.
- When room temperature is higher than
desired temperature, cooling operation
will be performed.
1 When the unit is turned on, adjust desired
setting time with
button.
- Up to the maximum of 7 hours can be selected.
!
NOTE
After performing the setting, if corresponded
setting button is pressed once, remaining setting time will be displayed, and if it is pressed
once again, corresponded setting function will
be cancelled. (same function as
) Remaining
setting time will be displayed with the unit of 1
hour.
ENGLISH
Dehumidification Mode
14 OPERATING INSTRUCTIONS
ENGLISH
Child Lock Operation Function
1 Press the fan speed button and high temperature setting buttons simultaneously for
seconds.
2 During child lock operation,
- Whenever you press any button on display panel, it will immediately display
"CL", which means display panel is
locked.
- All the button on the indoor unit display
panel will not work.
- But the button on the remote control will
be operated.
3 Press the low and high temperature setting buttons simultaneously for 3 seconds
again. The unit will respond with beep.
child lock operation will removed.
Auto Re-Operation Function
When power is supplied again after unit operation has been stopped because of interruption of power supply due to outage or other
causes, auto re-operation will be performed by
remembering previous setting.
- When power is supplied, outdoor unit operation will be started within 3 minutes.
1 Auto re-operation function can be established/released by manipulating indoor unit
button.
* When initial state, Auto re-operation
function will be set up as standard.
For Releasing Re-Operation Function
Press the on/off, fan speed, high temp and
low temp buttons (4 buttons) simultaneously
for 3 seconds.
The unit will respond with beep and re-operation function will be removed.
For Setting Re-Operation Function
After funtion release, Press the on/off, fan
speed, high temp and low temp buttons (4
buttons) simultaneously for 3 seconds.
The unit will respond with beep and re-operation function will be setted.
MAINTENANCE AND SERVICE 15
Filter Cleaning
Indoor Unit
Grille, Case and Remote Control
- Turn the system off before cleanining, To
clean, wipe with a soft, dry cloth. Do not use
bleach or abrasives.
!
Please clean it once in a week.
1 Remove the Air filters.
- Take hold of the tab and pull slightly forward to remove the filter.
! CAUTION
NOTE
Supply power must be disconnected before cleaning the indoor unit.
When the air filter is to be removed, do
not touch the metal parts of the indoor
unit. It may cause an injury.
Air Filters
The air filters behind the front grille should be
checked and cleaned once every 2 weeks or
more often if neccessary.
- Never use any of the followings:
Water hotter than 40 °C.
Could cause deformation and/or discoloration.
Volatile substances.
Could damage the surfaces of the air conditioner.
2 Clean dirt from the air filter using a vacuum
cleaner or washing with water.
- If dirt is conspicuous, wash with a neutral
detergent in lukewarm water.
SI
B en
z ene
N N ER
S CO
U RI N
CLB
ARGE
- If hot water (50 °C or more) is used, it
may be deformed.
3 After washing with water, dry well in the
shade.
- Do not expose the air filter to direct sunlight or heat from a fire when drying it.
4 Install the air filter.
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MAINTENANCE AND SERVICE
16 MAINTENANCE AND SERVICE
ENGLISH
When the air conditioner is not
going to be used for a long time.
When air conditioner is not going
to be used for a long time.
1 Operate the air conditioner at the following
settings for 2 to 3 hours.
- Type of operation: Fan operation mode.
- This will dry out the internal mechanisms.
When the air conditioner is to be
used again.
1 Clean the air filter and install it in the indoor unit.
2 Check that the air inlet and outlet of the indoor/outdoor unit are not blocked.
3 Check that the ground wire is connected
correctly. It may be connect to the indoor
unit side.
! CAUTION
Turn off the breaker when the air conditioner is not going to be used for a long
time.
Dirt may collect and may cause a fire.
Helpful information
The air filters and your electiric bill.
If the air filters become clogged with dust, the
cooling capacity will drop, and 6 % of the electricity used to operate the air conditioner will
be wasted.
Operation Tips
Do not overcool the room.
This is not good for the health
and wastes electricity.
Keep blinds or curtains closed.
Do not let direct sunshine
enter the room when the air
conditioner is in operation.
Keep the room temperature
uniform.
Adjust the vertical and horizontal airflow direction to ensure a
uniform temperature in the
room.
Make sure that the doors
and windows are shut tight.
Avoid opening doors and windows as much as possible to
keep the cool air in the room.
Clean the air filter regularly.
Blockages in the air filter reduces the airflow and lowers
the cooling and dehumidifying
effects. Clean at least once
every two weeks.
Ventilate the room occasionally.
Since windows are kept
closed, it is a good idea to
open them and ventilate the
room now and then.
MAINTENANCE AND SERVICE 17
Check the following points before requesting repairs or service.... If the malfunction persist,
please contact your dealer.
The air conditioner
The room has a pecudoes not operate.
liar odor.
- Have you made a
- Check that this is not
mistake in timer oper- a damp smell exuded
ation?
by the walls, carpet,
furniture or cloth
- Has the fuse blown
items in the room.
or has the circuit
breaker been tripped?
It seems that condensation is leaking from
the air conditioner.
- Condensation occurs
when the airflow
from the air conditioner cools the warm
room air.
Air conditioner does
not operate for about 3
minutes when restart.
- This is the protector
of the mechanism.
- Wait about three minutes and operation
will begin.
Does not cool effectively.
- Is the air filter dirty?
See air filter cleaning
instructions.
- The room may have
been very hot when
the room air conditioner was first turned
on. Allow time for it
to cool down.
- Has the temperature
been set incorrectly?
- Are the indoor unit's
air inlet or outlet
vents obstructed?
Crack sound is heard.
- This sound is generated by the expansion/ constriction of
the front panel, etc.
due to changes of
temperature.
Remote control display
is faint, or no display at
all.
- Are the batteries depleted?
- Are the batteries inserted in the opposite
(+) and (-) directions?
Filter sign lamp (LED)
is ON.
- Cleaning the filter,
press the Timer button and ◀ button of
wired remote control
at the same time for
3 sec.
The error code is occurred after lightning
struck
- This product has
been applied to the
over current protection circuit.
Error can occur, but it
is normal behavior.
After few minutes, It
will operate normally.
The air conditioner operation is noisy.
- For a noise that
sounds like water
flowing.
* This is the sound of
freon flowing inside
the air conditioner
unit.
- For a noise that
sounds like the compressed air releasing
into atmosphere.
-This is the sound of
the dehumidifying
water being
processed inside the
air conditioning unit.
Call the service immediately in the following situations
1 Anything abnormal such as burning smell, loud noise etc. happen. Stop the unit and turn the
2
3
4
5
breaker off. Never try to repair by yourself or restart the system in such cases.
Main power cord is too hot or damaged.
Error code is generated by self diagnosis.
Water leaks from indoor unit even if the humidity is low.
Any switch, breaker (safety, earth) or fuse fails to work properly
User must carry routine checkup & cleaning to avoid unit’s poor performance.
In case of special situation, the job must be carried out by service person only.
ENGLISH
Troubleshooting Tips! Save time and money!
18 MAINTENANCE AND SERVICE
ENGLISH
Caution! Flammable Refrigerant.
Refrigerant Removal and ejection
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 braking 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 operation 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.
Disposal method and precaution
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 refrigerant are recovered safety, 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.
MAINTENANCE AND SERVICE 19
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 are 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 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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j) When the cylinders have been filled correctly and the process complete, 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.
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