TESLA TT26EX21 Split Type Air Conditioner User Manual

: June 1, 2024
: Tesla

Table of Contents

TESLA TT26EX21 Split Type Air Conditioner
Product Specifications
Product Usage Instructions
Frequently Asked Questions
SAFETY RULES AND RECOMMENDATIONS FOR THE INSTALLER
NAMES OF PARTS
EMERGENCY & AUTO-RESTART FUNCTION
OPERATING INSTRUCTIONS
INSTALLATION
Refrigerant piping connection
INFORMATION FOR THE INSTALLER
MAINTENANCE
TROUBLESHOOTING
INSTRUCTION FOR SERVICING
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

TESLA TT26EX21 Split Type Air Conditioner

TESLA-TT26EX21-Split-Type-Air-Conditioner-image

Product Specifications

Product Type: Split-Type Air Conditioner
Model Variants: TT26EX21-0932IA, TT34EX21-1232IA, TT51EX21-1832IA, TT68EX21-2432IA, TT26EX81-0932IAW, TT34EX81-1232IAW, TT34EXC1-1232IAWPC, TT34EX82BM-1232IAW, TT34EX82SM-1232IAW, TT51EX81-1832IAW, TT68EX81-2432IAW Ver. 2022

Product Usage Instructions

Safety Rules and Recommendations

It is important to follow safety rules and recommendations for both installers and users as outlined in the manual.

Names of Parts

Indoor Unit

Front panel
Air filter
Optional filter (if installed)
LED Display
Signal receiver
Terminal block cover
Ionizer generator (if installed)
Deflectors
Emergency button
Indoor unit rating label (Stick position optional)
Airflow direction louver
Remote controller

Outdoor Unit

Air outlet grille
Outdoor unit rating label
Terminal block cover
Gas valve
Liquid valve

Indoor Unit Display

Led	Function
SLEEP	Lights up during Timer operation when the air conditioner is

operational. Displays the malfunction code when a fault
occurs.
Temperature display / Error code| If present, displays temperature or error code.
TIMER| Lights up during Timer operation.

Emergency & Auto-Restart Function

Emergency function:
The emergency button is located on the E-box cover of the unit under the front panel.

Auto-restart function:
The unit is preset with an auto-restart function. In case of a power failure, the settings are memorized. When power is restored, the unit will restart with the previous settings.

Frequently Asked Questions

Q: How do I clean the air filters?
- A: To clean the air filters, carefully remove them from the unit and wash with lukewarm water. Allow them to dry completely before reinstalling.
Q: How often should I service the air conditioner?
- A: It is recommended to service the air conditioner at least once a year to ensure optimal performance.

“`

SPLIT-TYPE AIR CONDITIONER

USER MANUAL

ENG

BIH/ MNE

BG

For R32 DC Inverter models:
TT26EX21-0932IA TT34EX21-1232IA TT51EX21-1832IA TT68EX21-2432IA TT26EX81-0932IAW TT34EX81-1232IAW TT34EXC1-1232IAWPC TT34EX82BM-1232IAW TT34EX82SM-1232IAW TT51EX81-1832IAW TT68EX81-2432IAW
GR HR HU MKD RO SLO SRB

Ver. 2022

ENG
BIH/ MNE

OPERATING INSTRUCTION

Note: All the pictures in this manual are just schematic diagrams, the actual is the standard. Please read this owner’s manual carefully and thoroughly before operating the unit! Take care of this manual for future reference.
UPUTSTVO ZA UPOTREBU
Napomena: Sve slike u ovom prirucniku su samo sematski dijagrami, fizicki proizvod je standard. Molimo Vas da pazljivo i temeljno procitate ovo uputstvo za upotrebu prije koriscenja ureaja! Sacuvajte ovo uputstvo za buducu upotrebu.

BG

: , . , !

GR HR

: , . ! .
UPUTE ZA UPOTREBU
Napomena: Sve slike u ovom prirucniku su samo shematski dijagrami, fizicki proizvod je standard. Molimo Vas da pazljivo i temeljito procitate ovo uputstvo za upotrebu prije koristenja ureaja! Cuvajte ovaj prirucnik za buduce koristenje.

HU

FELHASZNÁLÓI KÉZIKÖNYV
Megjegyzés: A kézikönyvben található képek csak sematikus ábrák, az aktuális a szabvány. Kérjük, figyelmesen olvassa el ezt a kézikönyvet mieltt mködtetné az eszközt! rizze meg ezt a kézikönyvet a késbbiekre is.

MKD RO SLO

: , . ! .
MANUAL DE UTILIZARE
Nota: Fotografiile din acest manual sunt doar diagrame schematice. V rugm s citii “Manualul de Utilizare” cu atenie, înainte de a utiliza aerul condiionat, pentru a asigura funcionarea corespunztoare. Pstrai manualul pentru referine ulterioare.
PRIROCNIK ZA UPORABO
Opomba: Vse slike v tem prirocniku so le shematske risbe, dejansko stanje je standard. Prosimo, da pred uporabo skrbno in temeljito preberete ta prirocnik za uporabo! Prirocnik shranite za kasnejso uporabo.

SRB

UPUTSTVO ZA UPOTREBU
Napomena: Sve slike u ovom prirucniku su samo sematski dijagrami, fizicki proizvod je standard. Molimo Vas da pazljivo i temeljno procitate ovo uputstvo za upotrebu pre koriscenja ureaja! Sacuvajte ovo uputstvo za buducu upotrebu.

ENG

SAFETY RULES AND RECOMMENDATIONS FOR THE INSTALLER

· Read this guide before installing and using the appliance. · During the installation of the indoor and outdoor units the access to the working area should be forbidden to
children. Unforeseeable accidents could happen. · Make sure that the base of the outdoor unit is firmly fixed. · Check that air cannot enter the refrigerant system and check for refrigerant leaks when moving the air
conditioner. · Carry out a test cycle after installing the air conditioner and record the operating data. · The ratings of the fuse installed in the built in control unit are 4A / 250V . · Protect the indoor unit with a fuse of suitable capacity for the maximum input current or with another overload
protection device. · Ensure that the mains voltage corresponds to that stamped on the rating plate. Keep the switch or power plug
clean. Insert the power plug correctly and firmly into the socket, thereby avoiding the risk of electric shock or fire due to insufficient contact. · Check that the socket is suitable for the plug , otherwise have the socket changed. · The appliance must be fitted with means for disconnection from the supply mains having a contact separation in all poles that provide full disconnection under overvoltage category III conditions, and these means must be incorporated in the fixed wiring in accordance with the wiring rules. · The air conditioner must be installed by professional or qualified persons. · Do not install the appliance at a distance of less than 50 cm from inflammable substances (alcohol, etc.) or from pressurised containers (e.g. spray cans). · If the appliance is used in areas without the possibility of ventilation, precautions must be taken to prevent any leaks of refrigerant gas from remaining in the environment and creating a danger of fire · The packaging materials are recyclable and should be disposed of in the separate waste bins .Take the air conditioner at the end of its useful life to a special waste collection centre for disposal. · Only use the air conditioner as instructed in this booklet. These instructions are not intended to cover every possible condition and situation . As with any electrical household appliance , common sense and caution are therefore always recommended for installation, operation and maintenance. · The appliance must be installed in accordance with applicable national regulations. · Before accessing the terminals , all the power circuits must be disconnected from the power supply. · The appliance shall be installed in accordance with national wiring regulations. · This appliance can be used by children aaged 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. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.
SAFETY RULES AND RECOMMENDATIONS FOR THE USER
· Do not try to install the conditioner alone; always contact specialized technical personnel. · Cleaning and maintenance must be carried out by specialized technical personnel. In any case disconnect the
appliance from the mains electricity supply before carrying out any cleaning or maintenance. · Ensure that the mains voltage corresponds to that stamped on the rating plate. Keep the switch or power plug
clean. Insert the power plug correctly and firmly into the socket , thereby avoiding the risk of electric shock or fire due to insufficient contact. · Do not pull out the plug to switch off the appliance when it is in operation, since this could create a spark and cause a fire, etc. · This appliance has been made for air conditioning domestic environments and must not be used for any other purpose , such as for drying clothes, cooling food, etc. · The packaging materials are recyclable and should be disposed of in the separate waste bins . Take the air conditioner at the end of its useful life to a special waste collection center for disposal.
3

ENG
· Always use the appliance with the air filter mounted . The use of the conditioner without air filter could cause an excessive accumulation of dust or waste on the inner parts of the device with possible subsequent failures.
· The user is responsible for having the appliance installed by a qualified technician , who must check that it is earthed in accordance with current legislation and insert a thermomagnetic circuit breaker.
· The batteries in remote controller must be recycled or disposed of properly. Disposal of Scrap Batteries –Please discard the batteries as sorted municipal waste at the accessible collection point.
· Never remain directly exposed to the flow of cold air for a long time. The direct and prolonged exposition to cold air could be dangerous for your health .Particular care should be taken in the rooms where there are children , old or sick people.
· If the appliance gives off smoke or there is a smell of burning, immediately cut off the pow er supply and contact the Service Centre.
· The prolonged use of the device in such conditions could cause fire or electrocution. · Have repairs carried out only by an authorised Service Centre of the manufacturer . Incorrect repair could
expose the user to the risk of electric shock, etc. · Unhook the automatic switch if you foresee not to use the device for a long time. The airflow direction must be
properly adjusted. · The flaps must be directed downwards in the heating mode and upwards in the cooling mode. · Only use the air conditioner as instructed in this booklet. These instructions are not intended to cover every
possible condition and situation. As with any electrical household appliance, common sense and caution are therefore always recommended for installation , operation and maintenance. · Ensure that the appliance is disconnected from the power supply when it will remain inoperative for a long period and before carrying out any cleaning or maintenance. · Selecting the most suitable temperature can prevent damage to the appliance.
SAFETY RULES AND PROHIBITIONS
· Do not bend, tug or compress the power cord since this could damage it. Electrical shocks or fire are probably due to a damaged power cord. Specialized technical personnel only must replace a damaged power cord.
· Do not use extensions or gang modules. · Do not touch the appliance when barefoot or parts of the body are wet or damp. · Do not obstruct the air inlet or outlet of the indoor or the outdoor unit. The obstruction of these openings
causes a reduction in the operative efficiency of the conditioner with possible consequent failures or damages. · In no way alter the characteristics of the appliance. · Do not install the appliance in environments where the air could contain gas , oil or sulphur or near sources of
heat. · This appliance is not intended for use by persons (including children ) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. · Do not climb onto or place any heavy or hot objects on top of the appliance. · Do not leave windows or doors open for long when the air conditioner is operating. · Do not direct the airflow onto plants or animals. · A long direct exposition to the flow of cold air of the conditioner could have negative effects on plants and animals. · Do not put the conditioner in contact with water. The electrical insulation could be damaged and thus causing electrocution. · Do not climb onto or place any objects on the outdoor unit · Never insert a stick or similar object into the appliance. It could cause injury. · Children should be supervised to ensure that they do not play with the appliance. 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.
4

ENG

NAMES OF PARTS

Indoor unit

No. Description

1 Front panel

2 Air filter

3 Optional filter (if installed)

4 LED Display

5 Signal receiver

6 Terminal block cover

7 Ionizer generator(if installed)

8 Deflectors

9 Emergency button

10

Indoor unit rating label (Stick position optional)

11 Airflow direction louver

12 Remote controller

Outdoor unit
No. Description 13 Air outlet grille 14 Outdoor unit rating label 15 Terminal block cover 16 Gas valve 17 Liquid valve

Note: The above or the next pages mentioned figures are only intended to be a simple diagram of the appliance and may not correspond to the appearance of the units that have been purchased.
5

ENG
INDOOR UNIT DISPLAY

No. Led 1 SLEEP

2

Temperature display (if present) / Error code

3 TIMER

Function
SLEEP mode
1. Lights up during Timer operation when the air conditioner is operational
2. Displays the malfunction code when fault occurs.
Lights up during Timer operation.

The shape and position of switches and indicators may be different according to the model, but their function is the same.

EMERGENCY & AUTO-RESTART FUNCTION

Emergency function
If the remote controller fails to work or maintenance necessary, proceed as following: · Open and lift the front panel up to an angle to reach
the emergency button. · For heating model, press the emergency button
at first time, the unit will operate in COOL mode. Press at second time within 3 seconds, the unit will operate in HEATmode. Press at third time after 5 seconds, the unit will turn off. · For cooling only model, press the emergency button at first time, the unit will operate in COOL mode. Press again, the unit will turn off.

front panel
Emergency button The emergency button is located on E-box cover of the unit under the front panel.

Auto-restart function
The appliance is preset with an auto-restart function. In case of a sudden power failure, the module will memorizes the setting conditions before the power failure. When the power restores, the unit will restart automatically with the previous settings preserved by the memory function.
The shape and position of the emergency button may be different according to the model, but their function is the same.

6

ENG
REMOTE CONTROLLER

No.

Button

Function

1

To turn on or off the air conditioner .

2

OPTION To activate or deactivate optional function (Check below table).

3

To decrease temperature, time setting or choose the function.

4

To increase temperature , time setting or choose the function.

5

ECO

To activate / deactivate the ECO function which enables the unit automatically to sets the operation to achieve energy savings.

6

TURBO

Press this button to activate/deactivate the Superfunction which enables the unit to reach the preset temperature in the shortest time.

7

MODE

To select the mode of operation (AUTO COOL DRY FAN HEAT)

To select the fan speed of auto/mute/low/mid/mid/high/high/turbo , cycle as below

8

FAN

Flashing

1. If press time interval is over 2 seconds, to activate the swing of vertical flap(left/right)

or deactivate it.

9

2. If press time interval is in 2 seconds, the swing angle range of vertical flap will cycle as below.

deactivate

1. If press time interval is over 2 seconds, to activate the swing of horizontal

deflectors(left/right) or deactivate it.

10

2. If press time interval is in 2 seconds, the swing angle range of horizontal deflectors(left/right) will cycle as below.

Flashing

deactivate

ON/OFF ON
OFF

Mode AUTO COOL DRY FAN HEAT AUTO COOL DRY FAN HEAT

OPTIONS TIMER DISPLAY HEALTH I FEEL TIMER DISPLAY HEALTH SLEEP MILDEW I FEEL TIMER DISPLAY HEALTH MILDEW I FEEL TIMER DISPLAY HEALTH I FEEL TIMER DISPLAY HEALTH SLEEP I FEEL 8°C H CLEAN TIMER DISPLAY HEALTH I FELL CLEAN TIMER DISPLAY HEALTH SLEEP MILDEW I FEEL CLEAN TIMER DISPLAY HEALTH MILDEW I FEEL CLEAN TIMER DISPLAY HEALTH I FEEL CLEAN TIMER DISPLAY HEALTH SLEEP I FEEL 8°C H

7

ENG

You will hear a beep when you press the following buttons or select the following optional functions, though the actual model haven’t this function, we express our apologies:

Optional Function: COMFORTABLE COOLING
airflow Optional Function: COMFORTABLE HEATING
airflow

HEALTH Optional Function: generate the ionizer button: SWING LEFT/RIGHT

Hold and together over 3 seconds to activate of deactivate the Lock function

Meaning of symbols on the liquid crystal display

No.

Symbols

Meaning

1

Single indicator

2

Lock function indicator

3

Battery indicator

4

AUTO

Mode Auto function indicator

5

COOL

Mode Cooling indicator

6

DRY

Mode Dry indicator

7

FAN

Mode Fan indicator

8

HEAT

Mode Heating indicator

9

ECO

ECO function indicator

8

No. 10

11

12

Flashing

13 14 15

16

17

18

19

ENG

Symbols TIMER

Flashing

Meaning Timer indicator Temperature indicator Fan speed indicator: Auto low low mid mid high Mute indicator SUPER indicator Flap swing angle indicator Deflector swing angle indicator Comfortable cooling airflow indicator Comfortable heating airflow indicator

Optional functions indicator Notes: There is no HEALTH/WIND FREE/ GEN MODE functions for current models, we express our apologies.

The following angle can not be selected for current models, we express our apologies.
Flashing
Replacement of Batteries
Remove the battery cover plate from the rear of the remote controller, by sliding it in the direction of the arrow. Install the batteries according the direction (+and -) shown on the Remote Controller. Reinstall the battery cover by sliding it into place.
Use 2 LRO 3 AAA (1.5V) batteries . Do not use rechargeable batteries . Replace the old batteries with new ones of the same type when the display is no longer legible. Do not dispose batteries as unsorted municipal waste. Collection of such waste separately for special treatment is necessary.
Note: Child-lock: Press and together to activate Display ON/OFF: Long press ECO button
Please remove batteries to avoid leakage damage when not using for a long time.
9

ENG
WARNING! 1. Direct the remote controller toward the Air conditioner. 2. Check that there are no objects between the remote control
and the Signal receptor in the indoor unit. 3. Never leave the remote controller exposed to the rays of the
sun. 4. Keep the remote controller at a distance of at least 1m from
the television or other electrical appliances.

OPERATING INSTRUCTIONS

The air sucked by the fan enters from the grill and passes through the filter, then it is cooled/dehumidified or heated through the heat exchanger.
The direction of the air outlet is motorized up and down by flaps, and manually moved right and left by the vertical deflectors, for some models, the vertical deflectors could be controlled by motor as well.

Filter Heat Exchanger

Signal receptor

“Swing” control of the air flow

1. Press the button to activate the FLAP , 1. If press time interval is in 2 seconds, the swing will cycle as below
deactivate
2. If press time interval is over 2 seconds, it will be deactivate the air flow is directed alternatively from up to down .In order to guarantee an even diffusion of the air in the room.
2. Press the button to activates the motorized deflectors 1. If press time interval is in 2 seconds the swing will cycle as below
flashing deactivate
2. If press time interval is over 2 seconds, it will be deactivate the air flow is directed alternatively from left to right. (Optional function, depends on the models). The deflectors are positioned manually and placed under the flaps. They allow to direct the air flow rightward or leftward.

WARNING!
· This adjustment must be done while the appliance is switched off.
· Never position “Flaps” manually, the delicate mechanism might seriously damaged!
· Never poke fingers, sticks or other objects in the air inlet or outlet vents. Such accidental contact with live pants might cause unforeseeable damage or hurt.
· The following angle can not be selected for current models, we express our apologies.

“flap” movement

Fan

Deflectors

“flaps”

flashing

10

ENG
Cooling mode
The cooling function allows the air condit- ioner to cool the room and at the same time reduces Air humidity.
To activate the cooling function (COOL) , press the MODE button until the symbol COOL appears on the display. The cooling function is activated by setting the button or at a temperature lower than that of the room. To optimize the function of the Air conditioner, adjust the temperature (1), the speed (2) and the direction of the air flow (3) by pressing the button indicated.

Heating mode
The heating function allows the air conditi- oner to heat the room.
To activate the heating function (HEAT) , press the MODE button until the symbol HEAT appears on the display. With the button or set a temperature higher than that of the room. To optimize the function of the Air conditioner adjust the temperature (1), the speed (2) and the direction of the air flow (3) by pressing the button indicated.

WARNING!

In HEATING operation, the appliance can automatically activate a defrost cycle, which is essential to clean the frost on the condenser so as to recover its heat exchange function. This procedure usually lasts for 2-10 minutes during defrosting,indoor unit fan stop operation. After defrosting ,it resumes to HEATING mode automatically.

Dry mode
This function reduces the humid- ity of the air to make the room more comfortable.

To set the DRY mode, Press MODE until DRY appears in the display. An automatic function of alternating cooling cycles and air fan is activated.

Fan mode (not FAN button)

The air conditioner works in only ventilation.

To set the FAN mode, Press MODE until FAN appears on the display.
Auto mode

Automatic mode.
To activate the AUTO mode of operation, press the MODE button on the remote controller until the symbol AUTO appears on the display. In AUTO mode , the air conditioner will run automatically according to the room temperature.

11

ENG
Display function (indoor display)

Switch on/off the LED display on panel

Press OPTION at the fist time, select the DISPLAY by pressing the

button or until symbol DISPLAY is flashing; Press OPTION again to

switch off the LED display on the panel, and

appears on the

remote controller display. Do it again to switch on the LED display.

ECO function
The air conditioner works in economic mode
Only in Heating or Cooling model, press ECO button and symbol ECO will appear on the display, the air conditioner will work in energy saving process. To cancel this function, pressing the MODE to switch other mode or pressing the ECO button again.

Turbo function

To activate turbo function,pressing the button TURBO or pressing the button FAN until symbol appears on the display. To cancel this function, pressing the FAN to switch other fan speed or pressing the TURBO button again. In AUTO/HEAT/COOL/FAN mode, When you select TURBO feature, it will use the highest fan setting to blow strong airflow.
Sleep function

Press OPTION at the fist time , select the SLEEP by pressing the button or until symbol SLEEP is flashing; Press OPTION again to activate
the SLEEP function, and SLEEP appears on the display. Do it again to deactivate this function. After 10 hours running in sleep mode, the air conditioner will return to the previous setting mode.
Mildew function

Press OPTION at the fist time , select the MILDEW by pressing the button or until symbol MILDEW is flashing;

Press OPTION again to activate the MILDEW function, and

appears on the display. Do it again to

deactivate this function. This function enable the air conditioner still blow airflow about 15 minutes to dry the

indoor inner parts to avoid mildew, when the air conditioner is off.

Note: MILDEW function only available in DRY/COOLING mode

12

ENG
Self-clean function

Switch off the air conditioner.

Press OPTION at the fist time , select the CLEAN by pressing the

button or until symbol CLEAN is flashing; Press OPTION again to

activate the CLEAN function, and

appears on the display. Do it

again to deactivate this function.

1. This function help carry away the accumulated dirt, bacteria, etc from the evaporator.
2. This function will run about 30 minutes, and it will return to the pre- setting mode .You can press or MODE to cancel this function during the process. You will hear 2 beeps when it’s finished or cancelled.
3. It’s normal if there are some noise during this function process, as plastic materials expand with heat and contract with cold.
4. We suggest operate this function as the following ambient condition to avoid certain safety protection features.

Indoor unit

Temp<30°C

Outdoor unit

5°C <Temp<30°C

5. We suggest operate this function per 3 months.

8°C heating function

Only can be set in Heating mode

1. Press OPTION at the first time, select the 8°C H by pressing the button or until symbol 8°C H is flashing;

Press OPTION again to activate the 8°C heating function, and

appears on the display. Do it again or

change the mode to deactivate this function.

2. This function enable the setting temperature 8°C when heating.

Timer function

To set the automatic switch-on /off of the air conditioner

For timer on, before proceeding with the time: Switch the conditioner
off (with the key ). program the working mode with the button MODE and the fan speed with the button FAN.
Timer setting/change/cancel: 1. Press OPTION at the fist time, select the Timer by pressing the button or until symbol TIMER is flashing;

2. Press OPTION again, the data symbol like be flashing;

and TIMER will

3. To set the timer orchange the timer:

(1) Press the button or to set the expected timer (Increase or

decrease at half-hour intervals) the symbols and TIMER both are

flashing.

(2) Press OPTION or wait for 5 seconds without any operation

to confirm the timer, the pre-setting timer like

and symbol

will be on the display.

To cancel the timer (if TIMER is on)

Figure 1 Timer-on when switch off

Press OPTION or wait for 5 seconds without any operation to

cancel the timer .

Note: All processing should be operated in 5 seconds, otherwise the processing will be cancelled.

Figure 2 Timer-off when switch on

13

ENG
I FEEL function

Press OPTION at the fist time , select the I FEEL by pressing the button

or until symbol I FEEL is flashing; Press OPTION again to activate

the I FEEL function, and I

appears on the display. Do it again to

deactivate this function.

This function enable the remote control to measure the temperature

at its current location and send this signal 7 times in 2 hours to the air

conditioner to enable the air conditioner to optimize the temperature

around you and ensure maximum comfort. It will automatically

deactivate 2 hours later , or indoor temperature exceed the range

0~50°C.

Operating Temperature

The air conditioner is programmed for comfortable and suitable living conditions as below if used outside the conditions, certain safety protection features might come into effect.,

Fix air conditioner:

Temperature
Room temperature
Outdoor temperature

Cooling operating 17°C~32°C
15°C~43°C for T1 Climate 15°C~52°C for T3 Climate

Mode Heating operating
0°C~27°C
-7°C~24°C

Drying operating 17°C~32°C
15°C~43°C for T1 Climate 15°C~52°C for T3 Climate

Inverter air conditioner:

Temperature
Room temperature
Outdoor temperature

Cooling operating
17°C~32°C
15°C~53°C -15°C~53°C For models with low temperature cooling system

Mode Heating operating
0°C~30°C
-20°C~30°C

Drying operating
17°C~32°C
15°C~53°C -15°C~53°C For models with low temperature cooling system

WARNING!
· The unit does not operate immediately if it is turned on after being turned off or after changing the mode during operation.This is a normal self- protection action,you need waiting for about 3 minutes.
· The capacity and efficiency are according to the test conducted at full-load operation(The highest speed of indoor fan motor and the maximum open angle of the flaps and deflectors are requested.)

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ENG

INSTALLATION

Important considerations
· The air conditioner you buy must be installed by professional personnel and the Installation manual is used only for the professional installation personnel! The installation specifications should be subject to our after-sale service regulations.
· When filling the combustible refrigerant, any of your rude operations may cause serious injury or injuries to human body or bodies and object or objects.
· A leak test must be done after the installation is completed. · It is a must to do the safety inspection before maintaining or repairing an air conditioner
using combustible refrigerant in order to ensure that the fire risk is reduced to minimum. · It is necessary to operate the machine under a controlled procedure in order to ensure
that any risk arising from the combustible gas or vapor during the operation is reduced to minimum. · Requirements for the total weight of filled refrigerant and the area of a room to be equipped with an air conditioner (are shown as in the following Tables GG.1 and GG.2)

The maximum charge and the required minimum floor area

m = (4 m3) x LFL , m = (26 m3) x LFL, m = (130 m3 ) x LFL

1

2

3

Where LFL is the lower flammable limit in kg/m3, R290 LFL is 0.038 kg/ m3, R32 LFL is 0.038 kg/m3.

For the appliances with a charge amount m1 < M = m2: The maximum charge in a room shall be in accordance with the following:

m = 2.5 x (LFL)(5/4) x h x (A)1/2

max

0

The required minimum floor area Amin to install an appliance with refrigerant charge M (kg) shall be in accordance with following:

A = (M/ (2.5 x (LFL)(5/4) x h ))2

min

0

Where:

mmax is the allowable maximum charge in a room, in kg; M is the refrigerant charge amount in appliance, in kg;

Amin is the required minimum room area, in m2; A is the room area, in m2;

LFL is the lower flammable limit, in kg/m3;

h0 is the installation height of the appliance,in meters for calculating mmax or Amin, 1.8 m for wall mounted.

Table GG.1 – Maximum charge (kg)

Refrigerant piping connection

The piping can be run in the 3 directions indicated by numbers in the picture . When the piping is run in direction 1or 3, cut a notch along the groove on the side of the indoor unit with a cutter. Run the piping in the direction of the wall hole and bind the copper pipes , the drain pipe and the power cables together with the tape with the drain pipe at the bottom, so that water can flow freely. · Do not remove the cap from the pipe until connecting it,
to avoid dampness or dirt from entering. · If the pipe is bent or pulled too often , it will become stiff
. Do not bend the pipe more than three times at one point. · When extending the rolled pipe, straighten the pipe by unwinding it gently as shown in the picture.

Shape the connection pipe YES
NO Extending the rolled pipe

Connections to the indoor unit
1. Remove the indoor unit pipe cap (check that there is no debris inside).
2. Insert the fare nut and create a flange at the extreme end of the connection pipe.
3. Tighten the connections by using two wrenches working in opposite directions.
4. For R32/R290 refrigerants, mechanical connectors should be outdoors.

Indoors

Outdoors The connectors should be outdoors

Torque wrench

Indoor unit condensed water drainage

The indoor unit condensed water drainage is fundamental for
the success of the installation. 1. Place the drain hose below the piping, taking care not to create siphons.

2. The drain hose must slant downwards to aid drainage.

3. Do not bend the drain hose or leave it protruding or twisted and do not put the end of it in water. If an extension is connected to the drain hose, ensure that it is lagged when it passes into the indoor unit.

4. If the piping is installed to the right, the pipes, power

cable and drain hose must be lagged and secured onto

the rear of the unit with a pipe connection.

1. Insert the pipe connection into the relative slot.

NO

2. Press to join the pipe connection to the base.

YES NO

20

Installation of the indoor unit

Covered by vinyl tape

connection cable

refrigerant pipe

insulation sleeve

connection cable 1 (for heat-pump)
Probe cable (for heat-pump)

refrigerant pipe Condensed water drain pipe

Mounting plate

ENG

After having connected the pipe according to the instructions, install the connection cables. Now install the drain pipe. After connection, lag the pipe, cables and drain pipe with the insulating material.
1. Arrange the pipes ,cables and drain hose well.
2. Lag the pipe joints with insulating material , securing it with vinyl tape.
3. Run the bound pipe , Cables and drain pipe through connection cable the wall hole and mount the indoor unit onto the upper part of the mounting plate securely.
4. Press and push the lower part of the indoor unit tightly against the mounting plate.

Installation of the outdoor unit
· The outdoor unit should be installed on a solid wall and fastened securely. · The following procedure must be observed before co- nnecting the pipes and connecting cables : decide
which is the best position on the wall and leave enough space to be able to carry out maintenance easily. · Fasten the support to the wall using screw anchors which are particularly suited to the type of wall; · Use a larger quantity of screw anchors than normally required for the weight they have to bear to aviod vibration
during operation and remain fastened in the same position for years without the screws becoming loose. · The unit must be installed following the national regulations.

Outdoor unit condensed water drainage (only for heat pump models)

The condensed water and the ice formed in the outdoor unit during heating operation can be drained away thro- ugh the drain pipe
1. Fasten the drain port in the 25mm hole placed in the part of the unit as shown in the picture.
2. Connect the drain port and the drain pipe. Pay attention that water is drained in a suitable place.

drain port

drain pipe

Electrical connections
1. Remove the handle on the right side plate of outdoor unit. 2. Connect the power connection cord to the terminal board. Wiring
should fit that of indoor unit. 3. Fix the power connection cord with wire clamp. 4. Confirm if the wire has been fixed properly. 5. An efficient earth connection must be ensured. 6. Recover the handle.

wiring diagram on the back of the cover
screw

21

ENG
Connecting the pipes
Screw the flare nuts to the outdoor unit coupling with the same tightening procedures described for the indoor unit. To avoid leakage, pay attention to the following points:
1. Tighten the flare nuts using two wrenches. Pay attention not to damage the pipes.
2. If the tightening torque is not sufficient , there will probably be some leakage. With excessive tightening torque there will also be some leakage, as the flange could be damaged.
3. The surest system consists in tightening the connection by using a fix wrench and a torque wrench.
Bleeding
Air and humidity left inside the refrigerant circuit can cause compressor malfunction. After having connected the indoor and outdoor units, bleed the air and humidity from the refrigerant circuit by using a vacuum pump.
Refrigerant Pressure Inspection
Air-returning Low-pressure Range of Refrigerant R290: 0.4-0.6Mpa; Air- exhausting High-pressure Range: 1.52.0Mpa; Air-returning Low-pressure Range of Refrigerant R32: 0.8-1.2Mpa; Air-exhausting High-pressure Range: 3.23.7Mpa; It means that the refrigerating system or refrigerant of an air conditioner is abnormal if the air-exhausting and airreturning pressure ranges of the detected compressor exceed the nor mal ranges to a large extent.

connection pipes

flare nuts liquid tap
gas tap
indoor unit gas valve

liquid valve tap

service port nut

protection caps

service port

vacuum pump

Bleeding
The air and humidity left inside the refrigerant circulat- ion can cause compressor malfunction. After having connected the indoor and outdoor units, bleed the air and humidity from the refrigerant circulation using a vacuum pump.
1. Unscrew and remove the caps from the 2 – way and 3-way valves.
2. Unscrew and remove the cap from the service port.
3. Connect the vacuum pump hose to the service port.
4. Operate the vacuum pump for 10 – 15 minutes until an absolute vacuum of 10 mm Hg has been reached.
5. With the vacuum pump still in operation , close the low – pressure knob on the vacuum pump coupling. Stop the vacuum pump.
6. Open the 2 – way valve by 1/4 turn and then close it after10 seconds. Check all the joints for leaks using liquid soap or an electronic leak device.
7. Turn the body of the 2-way and 3-way valves. Disconnect the vacuum pump hose.
8. Replace and tighten all the caps on the valves.

22

ENG 3-way valve diagram
connect to indoor unit
open position spindle

Connect to outdoor unit
Valve core

needle service port cap

Service port nut
2. Turn 8. Tighten

Indoor unit
Refrigerant flow direction
3-way valve

2-way valve

6. Open 1/4 turn

7. Turn to fully open the valve

1. Turn

Valve cap

8. Tighten

7. Turn to fully open the valve Valve cap 1. Turn
8. Tighten

Operation test
1. Wind insulating covering around the joints of the indoor unit and fix it with insulating tape.
2. Fix the exceeding part of the signal cable to the piping or to the outdoor unit.
3. Fix the piping to the wall ( after having coated it with insulating tape) using clamps or insert them into pla- stic slots.
4. Seal the hole in the wall through which the piping is passed so that no air or water can fill.
Indoor unit test · Do the ON/OFF and FAN operate normally? · Does the MODE operate normally? · Do the set point and TIMER function properly? · Does each lamp light normally? · Do the flap for air flow direction operate normally? · Is the condensed water drained regularly?
23

Clamps

insulating covering

piping (indoor)

insulating tape
piping gasket
(outdoor)

wall

ENG
Outdoor unit test · Is there any abnormal noise or vibration during operation? · Could the noise , the air flow or the condensed water drainage disturb the neighbours? · Is there any coolant leakage? Note: the electronic controller allows the compressor to start only three minutes after voltage has reached the system.

INFORMATION FOR THE INSTALLER

MODEL capacity (Btu/h) Lenght of pipe with standard charge Maximum distance between indoor and outdoor unit Additional refrigerant charge Max. diff. in level between indoor and outdoor unit Type of refrigerant 1

1 Refer to the data rating label sticked on the outdoor unit.

Tightening torque for protection caps and flange connection

PIPE

Tightening torque [N x m]

Corresponding stress (using a 20cm wrench)

1/4″ (6)

15 – 20

wrist strength

3/8″ (9.52)

31 – 35

arm strength

1/2″ (12)

35 – 45

arm strength

5/8″ (15.88)

75 – 80

arm strength

9k/12k 5m 15m
20g/m 5m
R410A

18k/24k 5m 15m
30g/m 5m
R410A

Service port nut Protection caps

Tightening torque [N x m] 7 – 9
25 – 30

MODEL capacity (Btu/h) Lenght of pipe with standard charge Maximum distance between indoor and outdoor unit Additional refrigerant charge Max. diff. in level between indoor and outdoor unit Type of refrigerant 1

9k/12k 5m 25m
15g/m 10m R32/R290

1 Refer to the data rating label sticked on the outdoor unit. 2 The total charge amount should under the maximum according to the table GG.1.

Tightening torque for protection caps and flange connection

PIPE

Tightening torque [N x m]

Corresponding stress (using a 20cm wrench)

1/4″ (6)

15 – 20

wrist strength

3/8″ (9.52)

31 – 35

arm strength

1/2″ (12)

35 – 45

arm strength

5/8″ (15.88)

75 – 80

arm strength

Service port nut Protection caps

18k/24k 5m 25m
25g/m 10m R32/R290
Tightening torque [N x m] 7 – 9 25 – 30

24

ENG
Wiring diagram
For different models, the wiring diagram may be different. Please refer to the wiring diagrams pasted on the indoor unit and outdoor unit respectively. On indoor unit, the wiring diagram is pasted under the front panel; On outdoor unit, the wiring diagram is pasted on the backside of the outdoor handle cover.
Front panel
Wiring diagram

Outdoor handle cover

Wiring diagram
Note: For some models the wires has been connected to the main PCB of indoor unit by manufacturer without terminal block.

Cable wires specification

ON-OFF Type MODEL capacity (Btu/h)

N

Power supply cable

L

E

N

L

Connection supply

1

cable

2

3

9k

12k

18k

1.0mm2 AWG18 1.0mm2 AWG18 1.0mm2 AWG18
1.0mm2

sectional area

1.0mm2 (1.5mm)2 AWG18 (AWG16)
1.0mm2 (1.5mm)2 AWG18 (AWG16)
1.0mm2 (1.5mm)2 AWG18 (AWG16)

1.5mm2 AWG16 1.5mm2 AWG16 1.5mm2 AWG16

1.0mm2 (1.5mm)2

1.5mm2

1.0mm2

1.0mm2 (1.5mm)2

1.5mm2

1.0mm2

1.0mm2 (1.5mm)2

1.5mm2

0.75mm2

24k
2.5mm2 AWG14 H05RN-F
2.5mm2 AWG14 H05RN-F
2.5mm2 AWG14 H05RN-F 0.75mm2 0.75mm2 0.75mm2 0.75mm2 0.75mm2
0.75mm2

25

ENG

INVERTER TYPE R410a MODEL capacity (Btu/h)

N

Power supply cable

L

E

N

Connection supply

L

cable

1

9k

12k

18/22k

sectional area

1.0mm2 (1.5mm)2 AWG18 (AWG16)
1.0mm2 (1.5mm)2 AWG18 (AWG16)
1.0mm2 (1.5mm)2 AWG18 (AWG16)

1.5mm2 AWG16
1.5mm2 AWG16
1.5mm2 AWG16

1.0mm2 (1.5mm)2 1.0mm2 (1.5mm)2

1.5mm2

1.0mm2 (1.5mm)2 1.0mm2 (1.5mm)2

1.5mm2

1.0mm2 (1.5mm)2 1.0mm2 (1.5mm)2

1.5mm2

1.0mm2 (1.5mm)2 1.0mm2 (1.5mm)2

1.5mm2

INVERTER TYPE R32 MODEL capacity (Btu/h)

N

Power supply cable

L

N

Connection supply

(L)

cable

1

9k
1.5mm2 1.5mm2 1.5mm2 0.75mm2 0.75mm2 0.75mm2 0.75mm2

12k

18k

sectional area

1.5mm2

0.75mm2

outdoor

24k
2.5mm2 AWG14 2.5mm2 AWG14 2.5mm2 AWG14 0.75mm2 0.75mm2 0.75mm2 0.75mm2
24k
2.5mm2 2.5mm2 2.5mm2 0.75mm2 0.75mm2 0.75mm2 0.75mm2

power supply

indoor

26

ENG

MAINTENANCE

Periodic maintenance is essential for keeping your air conditioner efficient. Before carrying out any maintenance , disconnect the power supply by taking the plug out from the socket.

Indoor unit
Antidust filters
1. Open the front panel following the direction of the arrow
2. Keeping the front panel raised with one hand, take out the air filter with the other hand
3. Clean the filter with water ; if the filter is soiled with oil,it can be washed with warm water (not exceeding 45°C). Leave to dry in a cool and dry place.
4. Keeping the front panel raised with one hand , insert the air filter with the other hand
5. Close
The electrostatic and the deodorant filter (if installed) cannot be washed or regenerated and must be replaced with new filters after every 6 months.
Cleaning the heat exchanger
1. Open the front panel of the unit and life it till its greatest stroke and then unhooking it from the hinges to make the cleaning easier.
2. Clean the indoor unit using a cloth with the water (not higher than 40°C) and neutral soap. Never use aggressive solvents or detergents.
3. If the outdoor unit is clogged , remove the leaves and the waste and remove the dust with air jet or a bit of water.

antidust filter

End of season maintenance
1. Disconnect the automatic switch or the plug.
2. Clean and replace the filters
3. On a sunny day let the conditioner work in ventilation for some hours , so that the inside of the unit can dry completely.

Replacing the batteries

When: · There is no confirmation beep heard from the
indoor unit.
· The LCD doesn t act.

How: · Take off the cover at back.
· Place the new batteries respecting the symbols + and – .

N.B: Use only new batteries. Remove the batteries from the remote controller when the conditioner is not in operation

WARNING! Do not throw batteries into common rubbish , they should be disposed of in the special containers situated in the collection points.
27

ENG

TROUBLESHOOTING

Malfunction
The appliance does not operate
Strange odor Noise of running water A fine mist comes from the air outlet A strange noise can be heard
Insufficient airflow, either hot or cold
The appliance does not respond to commands
The display is off
Switch off the air conditioner immediately and cut off the power supply in the event of:

Possible causes Power failure/plug pulled out. Damaged indoor/outdoor unit fan motor. Faulty compressor thermomagnetic circuit breaker. Faulty protective device or fuses. Loose connections or plug pulled out. It sometimes stops operating to protect the appliance. Voltage higher or lower than the voltage range. Active TIMER-ON function. Damaged electronic control board. Dirty air filter. Back flow of liquid in the refrigerant circulation. This occurs when the air in the room becomes very cold, for example in the COOLING or DEHUMIDIFYING/DRY modes. This noise is made by the expansion or contraction of the front panel due to variations in temperature and does not indicate a problem. Unsuitable temperature setting. Obstructed air conditioner intakes and outlets. Dirty air filter. Fan speed set at minimum. Other sources of heat in the room. No refrigerant. Remote control is not close enough to indoor unit. The batteries of remote control need to be replaced. Obstacles between remote control and signal receiver in indoor unit. Active LIGHT function. Power failure. Strange noises during operation. Faulty electronic control board. Faulty fuses or switches. Spraying water or objects inside the appliance. Overheated cables or plugs. Very strong smells coming from the appliance.

28

ENG

Error signals on the display

In case of error, the display on the indoor unit shown the following error codes:

Display Description of the trouble

Indoor temperature sensor fault

Outdoor discharge temperature sensor fault

Indoor pipe temperature sensor fault

Outdoor IPM module fault

Outdoor pipe temperature sensor fault

Outdoor current detect fault

Refrigerant system leakage or fault

Outdoor PCB EEPROM fault

Malfunction of indoor fan motor

Outdoor fan motor fault

Outdoor air temperature sensor fault

Outdoor suction temperature sensor fault

INSTRUCTION FOR SERVICING

1. Check the information in this manual to find out the dimensions of space needed for proper installation of the device, including the minimum distances allowed compared to adjacent structures.
2. Appliance shall be installed, operated and stored in a room with a floor area larger than 4m2. 3. The installation of pipe-work shall be kept to a minimum. 4. The pipe-work shall be protected from physical damage, and shall not be installed in an unventilated space if
the space is smaller than 4m2 . 5. The compliance with national gas regulations shall be observed. 6. The mechanical connections shall be accessible for maintenance purposes. 7. Follow the instructions given in this manual for handling, installing, cleaning, maintaining and disposing of the
refrigerant. 8. Make sure ventilation openings clear of obstruction. 9. Notice:The servicing shall be performed only as recommended by the manufacturer. 10. Warning: The appliance shall be stored in a well-ventilated area where the room size corresponds to the room
area as specified for operation. 11. Warning: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). 12. The appliance shall be stored so as to prevent mechanical damage from occurring. 13. It is appropriate that anyone who is called upon to work on a refrigerant circuit should hold a valid and up-to-
date certificate from an assessment authority accredited by the industry and recognizing their competence to handle refrigerants, in accordance with the assessment specification recognized in the industrial sector concerned. Service operations should only be carried out in accordance with the recommendations of the equipment manufacturer. Maintenance and repair operations that require the assistance of other qualified persons must be conducted under the supervision of the person competent for the use of flammable refrigerants. 14. Every working procedure that affects safety means shall only be carried out by competent persons. 15. Warning: · Do not use means to accelerate the defrosting process or to clean, other than those recommended by the
manufacturer. · 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. · Do not pierce or burn. · Be aware that refrigerants may not contain an odour.

Caution: Risk of fire

Operating instructions 29

Read technical manual

ENG
16. Information on servicing: 1. Checks to the area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized. For repair to the refrigerating system, the following precautions shall be complied with prior to conducting work on the system. 2. Work procedure Work shall be undertaken under a controlled procedure so as to minimize the risk of 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 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 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.
17. 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
30

ENG
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.
18. 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.
19. 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.
20. Detection of flammable refrigerants Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. Ahalide torch (or any other detector using a naked flame) shall not be used.
21. 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.
22. 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.
23. Decommissioning Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment
31

ENG
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 onthe equipment are closed off. k. Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.
24. 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.
25. 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 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 recover 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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