TOSOT DTS-09R2-M Ducted Type Air Conditioner Owner’s Manual

TOSOT DTS-09R2-M Ducted Type Air Conditioner

Owner’s Manual
Original Instructions
Ducted Type Air Conditioner

Thank you for choosing our product.
Please read this Owner’s Manual carefully before operation and retain it for future reference.

User Notice

• The total capacity of the indoor units which runs at the same time can not exceed 150% of that of the outdoor units; otherwise, the cooling (heating) effect of each indoor unit would be poor.
• Switch the main power on 8 hours before start the unit, helpful for a successful startup.
• It is a normal phenomenon that the indoor unit fan will still run for 20~70 seconds after the indoor unit receives the “stop” signal so as to make full use of after-heat for the next operation.
• When the running modes of the indoor and outdoor units conflict, it will be indicated on the display of the wired controller in five seconds and then the indoor unit will stop. In this case, they can back to the normal condition by harmonizing their running modes: the cooling mode is compatible with the dehumidifying mode and the fan mode can go with any other mode. If the supply power fails when the unit is running, then the indoor unit will send the “start” signal to the outdoor unit three minutes later after power recovery.
• During installation, the communication cable and the power cord must not be twisted together but instead separated with an interval of at least 2cm; otherwise the unit is likely to run abnormally.
• 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. 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.
• This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.
• 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.
• The appliance shall be installed in accordance with national wiring regulations.

| Correct Disposal of this product
---|---
| This marking indicates that this product should not be disposed with other household wastes throughout the EU. To prevent possible harm to the environment or human health from uncontrolled waste disposal, recycle it responsibly to promote the sustainable reuse of material resources. To return your used device, please use the return and collection systems or contact the retailer where the product was purchased. They can take this product for environmental safe recycling.

Appliance shall be installed, operated and stored in a room with a floor area larger than Xm2 . (Please refer to table “a” in section of ” Safety operation of flammable refrigerant ” for Space X.)

Please notice that the unit is filled with flammable gas R32. Inappropriate treatment of the unit involves the risk of severe damages of people and material. Details to this refrigerant are found in chapter “refrigerant”. R32:675

Appliance filled with flammable gas R32.
Before use the appliance, read the owner’s manual first.
Before install the appliance, read the installation manual first.
Before repair the appliance, read the service manual first.

The Refrigerant

To realize the function of the air conditioner unit, a special refrigerant circulates in the system. The used refrigerant is the fluoride R32, which is specially cleaned. The refrigerant is flammable and inodorous. Furthermore, it can lead to explosion under certain conditions. But the flammability of the refrigerant is very low. It can be ignited only by fire.
Compared to common refrigerants, R32 is a nonpolluting refrigerant with no harm to the ozonosphere. The influence upon the greenhouse effect is also lower. R32 has got very good thermodynamic features which lead to a really high energy efficiency. The units therefore need a less filling.

WARNING
Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacture. Should repair be necessary, contact your nea-rest authorized Service Centre. Any repairs carried out by unqualified personnel may be dangerous. 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.
Appliance shall be installed, operated and stored in a room with a floor area larger than X m2. (Please refer to table “a” in section of ” Safety operation of flammable
refrigerant ” for Space X.)
Appliance filled with flammable gas R32. For repairs, strictly follow manufacturer’s instructions only. Be aware that refrigerants may not contain an odour. Read specialist’s manual.

Safety Precautions

Please read this manual carefully before use and operate correctly as instructed in this manual.

Please especially take notice of the following two symbols

Warning! It indicates improper operation which will lead to human casualty or sever injury.
Caution! It indicates improper operation which will lead to injury or property damage.

Warning!

• The installation should be committed to the appointed service center; otherwise it all cause water leakage, electric shock or fire etc.
• Please install the unit where is strong enough to withstand the weight of the unit; otherwise, the unit would fall down and cause injury or death.
• The drain pipe should be installed as instructed in the manual to guarantee the proper drainage; meanwhile it should be insulated to prevent condensing; otherwise the improper installation would cause water leakage and then wet the household wares in the room.
• Do not use or place any inflammable or explosive substance near the unit.
• Under the occurrence of an error (like burning smell etc.), please cut off the main power supply of the unit.
• Keep good ventilation in the room to avoid oxygen deficit.
• Never insert your finger or any other object into the air outlet/inlet grille.
• Please take notice of the supporting frame of the unit to see if it is damaged over the long time period of use.
• Never refit the unit and contact the sales agent or the professional installation personnel for the repair or relocation of the unit.
• An all-pole disconnection switch having a contact separation of at least 3mm in all poles should be connected in fixed wiring.

Caution!

• Before installation, please check if the power supply corresponds with the requirement specified on the nameplate and also check its security.
• Before use, please check if the piping and wiring are correct to avoid water leakage, refrigerant leakage, electric shock, fire etc.
• The main power supply must be earthed to avoid the hazard of electric shock and never connect this earth wire to the gas pipe, running water pipe, lightening rod or phone cable’s earth lead.
• Turn off the unit after it runs at least five minutes; otherwise its service life will be shortened.
• Do not allow children operate this unit.
• Do not operate this unit with wet hands.
• Cut off the main power supply prior to the cleaning of the unit or the replacement of the air filter.
• When the unit is not to be used for a long time, please cut off the main power supply of the unit.
• Do not expose the unit to the moist or corrosive circumstances.
• After the electric installation, please take an electric leakage test.

Installation Location and Matters Needing Attention

The installation of the unit must comply with the national and local safety regulations. The installation quality directly affects the normal use, so the user should not carry out the installation personally. Instead, the installation and debugging should be done by the professional personnel. Only after that, can the unit be energized.

1How to select the installation location for the indoor unit

• Where there is no direct sunlight.
• Where the top hanger, ceiling and the building structure are strong enough to withstand the weight of the unit. c. Where the drain pipe can be easily connected to outside.
• Where the flow of the air inlet and outlet are not blocked.
• Where the refrigerant pipe of the indoor unit can be easily led to outside.
• Where there is no inflammable, explosive substances or their leakage.
• Where there is no corrosive gas, heavy dust, salt mist, smog or moisture.

CAUTION ！
The unit which is installed in the following places is likely to run abnormally. If unavoidable, please contact the professional personnel at the appointed service center ：

1. Where is full of oil;
2. Alkaline soil off the sea;
3. Where there is sulfur gas(like sulfur hot spring);
4. Where there are devices with high frequency (like wireless devices, electric welding devices, or medical equipments);
5. Special circumstances.

Electric Wiring

• The installation must be done in accordance with the national wiring regulations.
• Only the power cord with the rated voltage and exclusive circuit for the air conditioning can be used.
• Do not pull the power cord by force.
• The electric installation should be carried out by the professional personnel as instructed by the local laws, regulations and also this manual.
• The diameter of the power cord should be large enough and once it is damaged it must be replaced by the dedicated one.
• The earthing should be reliable and the earth wire should be connected to the dedicated device of the building by the professional personnel. Besides, the air switch coupled with the leakage current protection switch must be equipped, which is of enough capacity and of both magnetic and thermal tripping functions in case of the short circuit and overload.

Earthing Requirements

• The air conditioner is classified into the Class I appliances, so its earthing must be reliable.
• The yellow-green line of the air conditioner is the earth line and can not be used for other purpose, cut off or fixed by the self-tapping screw; otherwise it would cause the hazard of electric shock.
• The reliable earth terminal should be provided and the earth wire can not be connected to any of the following places：
  1. Running water pipe;
  2. Coal gas pipe;
  3. Sewage pipe;
  4. Other places where the professional personnel think unreliable.

Accessories for Installation
Refer to the packing list for the accessories of the indoor and outdoor units respectively.

Installation Instructions

Outline Dimension Drawings of the Indoor Unit

Note: the unit in the followings figures is mm, unless otherwise specified. Fig.1 is applicable to

Item

Model

| A| B| C| D| E| F
---|---|---|---|---|---|---

09K
12K

| 760| 415| 710| 200| 450| 487

18K

| 1060| 415| 1010| 200| 450| 487

Dimension Requirements on the Installation Space of the Indoor Unit

Installation of the Indoor Unit

• Requirements on the Installation Location

1. Ensure the hanger is strong enough to withstand the weight of the unit.
2. The drainage of the drain pipe is easy.
3. No obstacle is in the inlet/outlet and the air circulation is in good condition.
4. Ensure the installation space shown in Fig.2 is left for the access to maintenance.
5. It should be far away from where there is heat source, leakage of inflammable, explosive substances, or smog.
6. It is the ceiling type unit (concealed in the ceiling).
7. The power cords and connection lines of the indoor and outdoor units must be at least 1m away from the TV set or radio to avoid the image interference and noise ( even if 1m is kept, the noise may be produced due to the strong electric wave).

• Installation of the Indoor Unit

1. Insert the M10 expansion bolt into the hole, and then knock the nail into the bolt. Refer to the Outline Dimension Drawings of the Indoor Unit for the distance  between holes and see Fig.3 for the installation of the expansion bolt.

Install the hanger on the indoor unit, as shown in Fig.4. Install the indoor unit on the ceiling, as shown in Fig.5.

CAUTION！

1. Prior to the installation, please make a good preparation for all piping (refrigerant pipe, drain pipe) and wiring (wires of the wired controller, wires between the indoor and outdoor unit) of the indoor unit to make the further installation much easier.
2. If there is an opening in the ceiling, it is better to reinforce it to keep it flat and prevent it vibrating. Consult the user and builder for more details.
3. If the strength of the ceiling is not strong enough, a beam made of angle iron can be used and then fix the unit on it.
4. If the indoor unit is not installed in the air conditioning area, please use sponge around the unit to prevent condensing. The thickness of the sponge depends on the actual installation environment.

Horizontality Check of the Indoor Unit
After the installation of the indoor unit, its horizontality must be checked to make sure the unit keep horizontal fore and aft and keep an inclination of 5° toward the drain pipe right and left, as shown in Fig.6.

Installation of the Air Supply Duct

Installation of the Rectangular Air Supply Duct

Table 2

b.Installation of the Round Air Supply Duct

Unitary Duct Split Unitary Duct Split

Installation Steps of the Round Air Supply Duct

1. Preinstall the outlet of the round duct on the transition duct and then fix it by the self-tapping screw.
2. Place the transition duct to the air outlet of the unit and fix it with rivet.
3. Connect the outlet to the duct and then tighten them with tape. Other installation details are not covered herein.

CAUTION！

1. The maximum length of the duct means the maximum length of the air supply duct plus the maximum length of the return air duct.
2. For the unit with the auxiliary electric heating function, if the round duct is to be adopted, then the straight length of the transition duct can not be less than 200mm.
3. The duct is either rectangular or round and connected with the air inlet/outlet of the indoor unit. Among all air supply outlets, at least one should be kept open. As for the round duct, it needs a transition duct of which the size should match with the air supply outlet of the unit. After the fitting of the transition duct, it is the turn of the round duct, which is better to be kept 10 meters far away from the corresponding diffuser. The standard accessories supplied is the transition duct 200mm long and round air outlet φ200, however, those of other specifications can be purchased.

Drawings of the Air Supply Outlet and Return Air Inlet

capacity:2.5~6.0kW

Table 4 Dimensions of the Air Supply Outlet and Return Air Inlet (unit: mm)

Item

Model

| Dimension of air outlet flange| Dimension of air return
---|---|---
A| B| C| D
09K

12K

| 122| 585| 200| 710
18K| 122| 885| 200| 1010

Installation of the Return Air Duct

• The default installation location of the rectangular flange is in the back and the return air cover plate is in the bottom, as shown in Fig.11.

• If the downward return air is desired, just change the place of the rectangular flange and the return air cover plate.
  Connect one end of the return air duct to the return air outlet of the unit by rivets and the other to the return air louver. For the sake of the convenience to freely adjust the height, a cutting of canvas duct will be helpful, which can be reinforce and folded by８＃iron wire.

• More noise is likely to be produced in the downward return air mode than the backward return air mode, so it is suggestive to install a silencer and a plenum box to minimize the noise.

• The installation method can be chose with considering the conditions of the building and maintenance etc., as shown in Fig.12.

Installation of the Condensate Pipe

• The condensate pipe should keep a inclination angle of5～10°, which can facilitate the drainage of the condensate water. And the joints of the condensate pipe should be insulated by the insulation material to prevent condensing(see Fig.13).
• There is a condensate outlet on both left and right sides of the unit. Once one is confirmed to be used, the other should be clogged by a rubber plug, bundled by the binding wire and insulated by the insulation material to avoid water leakage.
• The right outlet is defaulted to be clogged with a plug.

CAUTION！
No water leakage is allowed on the joint of the condensate pipe.

Design of the Drain Pipe

• The drain pipe should always keep an inclination angle(1/50～1/100) to avoid the water gathering in some certain place.
• During the connection of the drain pipe and device, do not impose too much force on the pipe on one side of the device and the pipe should be fixed as close as to the device.
• The drain pipe can be the ordinary hard PVC pipe which can be purchased locally. During the connection, inset the end of the PVC pipe to the drain outlet, then tighten it with the drain hose and binding wire but never connect the drain outlet and the drain hose by adhesive.
• When the drain pipe is used for multiple devices, the public section of the pipe should be 100mm lower than the drain hole of each device and it is better to use the much thicker pipe for such a purpose.

Installation of the Drain Pipe

• The diameter of the drain pipe should be larger or equal to that of the refrigerant pipe (PVC pipe, outer dimater:25mm, wall thickness≥1.5mm.
• The drain pipe should be as short as possible and with at least a 1/100 degree of slope to avoid forming air pockets.
• If the proper degree of slope of the drain pipe is not allowed, a lift pipe should be installed.
• A distance 1-1.5m should be kept between the hangers to avoid the drain hose making a turn.
• Insert the drain hose into the drain hole and tighten it with clamps.
• Wrap the clamps with large amount of sponge for thermal insulation.
• The drain hose inside the room also should be insulated.

Precautions for the Lift Pipe

The installation height of the lift pipe should be less than 850mm. It is recommended to set an inclination angle 1°～2° for the lift pipe toward the drainage direction. If the lift pipe and the unit form a right angle, the height of the lift pipe must be less than 800mm.

Notes:

1. The inclination height of the drain hose should be within 75mm so that the outlet of the drain hose does not suffer the external force.
2. If multiple drain pipes converge, please follow the installation steps below.

Test for the Drainage System

• After the electric installation, please take a test for the drainage system.
• During the test, check if the water flow goes through the pipe correctly and observe carefully the joint to see if it leaks or not. If this unit is installed in the newly built house, it is suggested to take this test prior to the ceiling decoration.

Piping

• Let the flare end of the copper pipe point at the screw and then tighten the screw by hand.

• After that, tighten the screw by the torque wrench unit it clat-ters (as shown in Fig.18).

• The bending degree of the pipe can not be too small; otherwise it will crack. And please use a pipe bender to bend the pipe.

• Installation of Ordinary Nut and Tamperproof box

• Unfold the connecting pipe and bend the connecting pipe according to the required length. Open the nut cover on the indoor unit’ s pipe and align the conical mouth of the con-necting pipe with the center of the indoor unit’ s pipe. Tighten the nut by hand and then tight-en it with a torque wrench. The connecting pipe of indoor unit must be installed with the tam-perproof box that is included in delivery. Once installed, the tamperproof box cannot be removed. If you need to break the connection between indoor and outdoor units, cut the con-nector. Replace with a new one and weld again.
  Notes:

  1. The removal-proof nut and tamperproof box should be installed at the connection end of the indoor unit and be connected to the indoor unit.
  2. The tamperproof box should not be overlapped during installation and must be completely covered with the accompanied insulated pipe before wrapping.

• Wrap the exposed refrigerant pipe and the joints by sponge and then tighten them with the plastic tape.

Table 6 Moments of Torque for Tightening Screws

1. Indoor unit’s pipe
2. Connecting pipe of indoor and outdoor units
3. Tapered screw nut (connection to the valve of outdoor unit)
4. Tamperproof box

CAUTION !

1. During the connection of the indoor unit and the refrigerant pipe, never pull any joints of the indoor unit by force; otherwise the capillary pipe or other pipe may crack, which then would result in leakage.
2. The refrigerant pipe should be supported by brackets, that is, don’t let the unit withstand the weight of it.

Insulation for the refrigerant pipe

• The refrigerant pipe should be insulated by the insulating material and plastic tape in order to prevent condensing and leaking.

• The joints of the indoor unit should be wrapped with the insulating material and no gas is allowed on the joint of the indoor unit, as shown in Fig.19.  CAUTION！
  After the pipe is protected well enough, never bend it to form a small angle; otherwise it would crack or break.

• Wrapping the pipe with tape.

  1. Bundle the refrigerant pipe and electric wire together with tape, and separate them from the drain pipe to prevent the condensate water overflowing.
  2. Wrap the pipe from the bottom of the outdoor unit to the top of the pipe where it enters the wall. During the wrapping, the later circle should cover half of the former one.
  3. Fix the wrapped pipe on the wall with clamps.

CAUTION！

1. Do not wrap the pipe too tightly; otherwise the insulation effect would be weakened. Additionally, make sure the drain hose is separated from the pipe
2. After that, fill the hole on the wall with sealing material to prevent wind and rain coming into the room.

Wiring between the Wire and the Wiring Terminal

• Wiring of the Single-Core Wire

1. Strip the insulating layer at the end of the wire about 25mm off with a wire striper.
2. Loosen the screw off on the wiring board of the air conditioning unit.
3. Shape with the pliers the end of the wire to a circle matching with the size of the screw.
4. Let the screw go through the circle of the wire and then fix it on the wiring board.

• Wiring of the Multi-Core Wire
  1. Strip the insulating layer at the end of the wire about 10mm off with a wire striper.
  2. Loosen the screw off on the wiring board of the air conditioning unit.
  3. Fix a wiring terminal matching with the size of the screw to the end of the multi-core wire with the crimpling pliers.
  4. Let the screw go through the terminal of the multi-core wire and then fix it on the wiring board.

WARNING!

1. If the power cord is damaged, they must be replaced with the dedicated one.
2. Prior to the wiring, please check the voltage marked on the nameplate and then carries out the wiring following the wiring diagram.
3. The dedicated power cord must be used for the air conditioning unit and the leakage current protection switch and air switch must be installed in case of the overload condition.
4. The air conditioning unit must be earthed to prevent the hazard caused by the failed insulation.
5. During the wiring, the wiring terminal or the single-core wire must be used; the direct wiring between the multi-core wire and wiring board would cause fire.
6. All wiring should be done strictly in accordance with the wiring diagram; otherwise the improper wiring would cause the air conditioning unit running abnormally or damaged.
7. Do not let the electric wires touch the refrigerant pipe, the compressor, the fanor other moving parts.
8. Do not modify the wiring inside the indoor unit randomly; otherwise the manufacturer won’t assume any responsibility for the damage or abnormal running of the unit.

Wiring of the Power Cord (single-phase)

CAUTION!
The power supply for each indoor unit must be uniform.

1. Dismantle the cover of the electric box of the indoor unit.
2. Let the power cord go through the rubber ring.
3. Connect the wiring (communication) through the piping hole of the chassis and the bottom of the appliance upward, then connect the brown wire to the Terminal board “3”;black wire(the communication wire) to the Terminal board“2”;blue wire to the Terminal board“N(1)”,and connect the earthing wire to the screw terminal on the electric box. Clamp them with the corresponding wire clamp packed in the chassis.
4. Fix the power cord tightly with the binding wire.

Electric Installation

Table 7

Indoor Unit| Power Cord| Running Current (A)| Input Power(W)| Recommended Power Cord (Sectional Area× Pieces)
---|---|---|---|---
Type| Model| Indoor Fan Motor| Cooling/Heating

Cooling/ Heating

| 09K| 220-240V~

50Hz

| 0.28| 70| 0.75×4
12K| 220-240V~

50Hz

| 0.33| 80| 0.75×4
18K| 220-240V~

50Hz

| 0.35| 80|

0.75×4

Notes：
The sectional area listed above is applicable to the power cord with at most a length of 15 meters. For the longer cord, its sectional area should be enlarged to avoid the cord burning out caused by the over-current.

Rated Working Conditions

Table 8 Working Temperature Range

Error Analysis

If your conditioning unit runs abnormally, please check the following items before contact the maintenance serviceman.

Table 9

• There is no power supply.
• The breaker opens owing to electrical leakage. Voltage is too low.

Stop after a short while of

operation

| The air inlet/outlet of the indoor/outdoor unit is clogged.
Poor cooling effect|

• The air filter screen is too dirty or clogged.
• There are too much heat sources or people in the room. The door or window is open.
• There are obstacles at the air inlet/outlet.
• The set temperature is too high.

uncontrollable controller

|

• If the remote controller crashes even if the batteries have been replaced, please open the back cover of it and press the button “ACL” to let it back to the normal condition.
• Is the remoter controller in the signal receiving  range?  Or  is  it blocked by obstacles?
• For the duct type unit, operate the remote controller pointing at the wired controller.
• Check if the voltage of the batteries of the wired controller is enough;  or change them.

Note

1. If the air conditioner still runs abnormally after the above check and handling, please contact the maintenance serviceman at the local appointed service center.
2. When the wired controller is connected, the indoor unit display is invalid and the unit won’t receive the remote control command. The phenomena is natural.

Table of Error Codes for Indoor Unit

refrigerant colleting mode
4| E4| Compressor high discharge temperature protection
5| E5| AC over-current protection
6| E6| Communication error
7| E7| Mode conflict
8| E8| Anti-high temperature protection
9| E9| Full water protection
10| F1| Indoor ambient temperature sensor is open/short circuited
11| F2| Indoor evaporator temperature sensor is open/short circuited
12| F3| Outdoor ambient temperature sensor is open/short circuited
13| F4| Outdoor condenser temperature sensor is open/short circuited
14| F5| Outdoor discharge temperature sensor is open/short circuited
15| H6| No feedback of indoor fan motor
16| C5| Jumper cap malfunction protection
17| EE| Loading EEPROM malfunction

Note: If there’re other error codes, please contact qualified professionals for service.

Maintenance

CAUTION! Take notice of the following items before clean your air conditioning unit.

1. Cut off the main power supply before contact any wiring device.
2. Only when the unit is turn off and the main power supply is cut off, can the unit be cleaned; otherwise it would cause an electric shock or injury.
3. Do not wash the unit with water; or it may cause an electric shock.
4. During the cleaning, remember to use the stable standing platform Daily

Maintenance.

• How to clean the filter

1. Never dismantle the air filer except for cleaning; otherwise it may cause some error.
2. When the air conditioning unit is used under the environment with heavy dust, the air filter should be cleaned often (generally once every two weeks).

• Maintenance before seasonal use

1. Check if the air inlet/outlet of the indoor unit is clogged.
2. Check if the earthing is in good condition.
3. Check if the wiring is in good condition.
4. Check if the indicating lamp of the wired controller blinks after it is energized.  

Note : If there is something abnormal, please consult the after-sales serviceman.

• Maintenance after seasonal use

1. Let the air conditioning unit run for half day under the fan mode to dry the inside of the unit.
2. If the unit is not to be used for a long time, please shut off the main power supply for energy conservation, at the same time, the power indicating lamp of the wired control will go off.

Safety operation of flammable refrigerant

Qualification requirement for installation and maintenance man

• All the work men who are engaging in the refrigeration system should bear the valid certification awarded by the authoritative organization and the qualification for dealing with the refrigeration system recognized by this industry. If it needs other technician to maintain and repair the appliance, they should be supervised by the person who bears the qualification for using the flammable refrigerant.
• It can only be repaired by the method suggested by the equipment’s manufacturer.

Installation notes

• The air conditioner is not allowed to use in a room that has running fire (such as fire source, working coal gas ware, operating heater).
• It is not allowed to drill hole or burn the connection pipe.
• The air conditioner must be installed in a room that is larger than the minimum room area. The minimum room area is shown on the nameplate or following table a. Leak test is a must after installation.

table a – Minimum room area ( m )2

Minimum room area( m 2 )| Charge amount (kg)| ≤1.2| 1.3| 1.4| 1.5| 1.6| 1.7| 1.8| 1.9| 2| 2.1| 2.2| 2.3| 2.4| 2.5
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---
floor location| /| 14.5| 16.8| 19.3| 22| 24.8| 27.8| 31| 34.3| 37.8| 41.5| 45.4| 49.4| 53.6
window mounted| /| 5.2| 6.1| 7| 7.9| 8.9| 10| 11.2| 12.4| 13.6| 15| 16.3| 17.8| 19.3
wall mounted| /| 1.6| 1.9| 2.1| 2.4| 2.8| 3.1| 3.4| 3.8| 4.2| 4.6| 5| 5.5| 6
ceiling mounted| /| 1.1| 1.3| 1.4| 1.6| 1.8| 2.1| 2.3| 2.6| 2.8| 3.1| 3.4| 3.7| 4

Maintenance notes

• Check whether the maintenance area or the room area meet the requirement of the nameplate.
  • It’s only allowed to be operated in the rooms that meet the requirement of the nameplate.
• Check whether the maintenance area is well-ventilated.
  • The continuous ventilation status should be kept during the operation process. Check whether there is fire source or potential fire source in the maintenance area.
  • The naked flame is prohibited in the maintenance area; and the “no smoking” warning board should be hanged.
• Check whether the appliance mark is in good condition.
  • Replace the vague or damaged warning mark.

Welding
If you should cut or weld the refrigerant system pipes in the process of maintaining, please follow the steps as below:

• Shut down the unit and cut power supply
• Eliminate the refrigerant
• Vacuuming
• Clean it with N2 gas
• Cutting or welding
• Carry back to the service spot for welding

The refrigerant should be recycled into the specialized storage tank.
Make sure that there isn’t any naked flame near the outlet of the vacuum pump and it’s well-ventilated.

Filling the refrigerant

• Use the refrigerant filling appliances specialized for R32. Make sure that different kinds of refrigerant won’t contaminate with each other.
• The refrigerant tank should be kept upright at the time of filling refrigerant.
• Stick the label on the system after filling is finished (or haven’t finished).
• Don’t overfilling.
• After filling is finished, please do the leakage detection before test running; another time of leak detection should be done when it’s removed.

Safety instructions for transportation and storage

• Please use the flammable gas detector to check before unload and open the container. No fire source and smoking.
• According to the local rules and laws.

Specialist’s Manual

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.

• Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are advised.

• Initial safety checks shall include:

  • that capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
  • that no live electrical components and wiring are exposed while charging, recover-ing or purging the system;
  • that there is continuity of earth bonding.

• Checking for presence of refrigerant

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

• 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.

• 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.

• Leak detection methods
  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 refrig-erant and corrode the copper pipe-work.

• 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.

• Checks to electrical devices

  • that capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
  • that no live electrical components and wiring are exposed while charging, recovering or purging the system.

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

  • Ensure that the apparatus is mounted securely.
  • Ensure that seals or sealing materials have not degraded to the point that they no longer serve the purpose of preventing the ingress of flammable atmospheres. Replacement parts shall be in accordance with the manufacturer’s specifications.
    NOTE :The use of silicon sealant can inhibit the effectiveness of some types of leak detection equipment. Intrinsically safe components do not have to be isolated prior to working on them.

• Repair to intrinsically safe components
  Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use.
  Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere. The test apparatus shall be at the correct rating.
  Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere from a leak.

• Cabling
  Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects. The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans.

• Detection of flammable refrigerants
  Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall not be used.

• Decommissioning
  Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of reclaimed refrigerant. It is essential that electrical power is available before the task is commenced.

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

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

• Recovery

  • When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely.
  • When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge 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 recovery cylinder, and the relevant waste transfer note arranged. Do not mix refrig-erants 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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