Aspes AAC3000 User guide

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Page 1

Model:AAC3000

This appliance is intended for domestic use only.

Page 2

CONTENTS

INSTALLATION MANUAL

ACCESSORIES

INSTALLATION OVERVIEW

INDOOR UNIT INSTALLATION

OUTDOOR UNIT INSTALLATION

DRAIN PIPE INSTALLATION

REFRIGERANT PIPE INSTALLATION

ELECTRICAL WIRING

AIR EVACUATION

TEST RUN

OWNER'S MANUAL

SAFTY PRECAUTIONS

PARTS AND FUNCTIONS

REMOVE CONTROLLER RECEIVER

MAINTENANCE

TROUBLESHOOTING

DISPOSAL GUIDELINE

INFORMATION SERVICING

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INSTALLATION MANUAL

ACCESSORIES

NOTE :

The air conditioning system comes with the following accessories. Use all of the installation parts and accessories to install the air conditioner. Improper installation may result in water leakage, electrical shock and fire, or cause the equipment to fail.

NAME Figure Quantity

Remote Controller Receiver

Pipe Clasp

Drain pipe accessories (sectional view)

Copper Nut (two specification)

Remote Controller

Dry Battery AAA

OPTION

U R

B O

Installation Owner' manual

Remote Controller Instruction

Page 4

INSTALLATION OVERVIEW

Read The Safety Precaution Install The Indoor Unit

Install The Drainage Pipe

Install The Outdoor Unit

Install The Refrigerant Pipe

Perform The Test Run

Electrical Wiring

Air Evacuation

Page 5

INDOOR UNIT INSTALLATION

Indoor Unit Parts

Pipe Juntion

Air Outlet

Mounting Hook

Electric Control Box

³ ö · ç³ ö · ç

Drainage Pipe

Air InletFilter

Refrigerant Pipe

PRECAUTION

WARNING

The indoor unit shall be firmly installed on the structure capable of bearing its weight. If the structure is too weak, the unit may fall and cause personal injury, property loss or death

DO NOT install the indoor unit in the bathroom or laundry because too much moisture will short circuit the indoor unit and corrode the wiring. Install the indoor unit at a height of more than 2.5m (8') above the floor.

CAUTION

Install indoor and outdoor equipment, cables and wires at least 1 m (3.2 ') from TV and radio to prevent static electricity or image distortion. The distance can be increased appropriately according to different equipment

If the indoor unit is installed on metal, it must be electrically grounded.

DO NOT install the unit in the following locations:

In areas with oil drilling or fracking In coastal areas with high salt content in the air In areas with caustic gases in the air, such as near hot springs In areas with power fluctuations, such as factories In enclosed spaces, such as cabinets In kitchens that use natural gas In areas with strong electromagnetic waves In areas that store flammable materials or gas In rooms with high humidity such as bathrooms or laundry rooms

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Indoor Unit Installation lnstructions

Select installation location

The indoor unit should be installed in a location that meets the following requirements:

There is enough room for installation and maintenance. There is enough room for the connecting pipe and drainpipe. The ceiling is horizontal and its structure can sustain the weight of the indoor unit. The air inlet and outlet are not impeded. The airflow can fill the entire room. There is no direct radiation from heaters.

Body Dimension

1.The positioning of celling hole, indoor unit and hanging screw bolts.

C D

Air inlet size

Air outlet opening size

D E F

570

18-24K

Outline dimension

A B

920

270

635

713

2.Position size of descensional ventilation opening.

Size of mounted hook

Air return opening size

179

815

J K L

260

Size of

mounted lug

350

960

30K

36-60K

1140

1200

270

300

775

865

710

800

933

968

179

204

1035

1094

260

268

1240

500

NOTE:All the figures in this manual are for explanation prupose only. They may be slightly different from the air conditioner you purchased. The actual unit shall prevail.

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Choice of air return ways

The air conditioner should be installed securely; otherwise poor installation may lead to abnormal noises and vibration.

This indoor unit is fitted with downward air return, which can be change to its backward counterpart if

necessary. Please follow the steps below(2-5) to change it into the mode of air return backward(6).

1.Air return backward

3. Loose the nut and dismantle flannel plate and filter; Loose the nut dismantel the back over.

2. Install the flannel plate and filter at the backside; Install the cover to the

downside.

4.Air return downward

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Hang Indoor Unit(For finished concrete bricks)

1 Drill 4 holes 5cm (2") deep at the ceiling hook positions in the internal ceiling. Be sure to hold the drill at a 90 angle to the ceiling. 2 Using a hammer, insert the ceiling hooks into the pre-drilled holes. Secure the bolt using the washers and nuts. 3 Install the four suspension bolts.

For finished concrete bricks

Install the hanging hook with expansible

New Concrete Bricks

Inlaying or embedding the screw bolts. bolt into the concrete deep to 45~50mm to prevent loose.

Wooden construction

(Blade shape insertion)

(Pipe hanging and embedding screw bolt)

(Slide insertion)

Steel bar

Embedding screw bolt

Put the square timber over the roof beam, then install the hanging screw bolts.

Timber over the beam

Roof beam

Ceiling

Hanging Screw

Bolt

Steel roof beam structure

Install the supporting angle steel.

Hanging screw bolt

Supporting

Hanging bolts

angle steel

4 Mount the indoor unit. You will need two people to Iift and secure it. Insert suspension bolts into the units hanging holes. Fasten them using the washers and nuts.

Below the ceiling

Hanging Bolt

Nuts(Up)

Gasket(Upside)

Installing Ear

Gasket(Downside)

Nut(Downside)

NOTE: L shoulId be long

enough to prevent the nuts from coming off

RECOMMENDED DISTANCES BETWEEN THE INDOOR UNIT AND THE CEILING

The distance between the mounted indoor unit and the internal ceiling should meet the following specifications.

100mm/3.9"

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Outlet Air Pipe Installation

Generally, we have two types of outlet pipe available, i.e. rectangular or round ones. Rectangular air conduit can be directly connected to air outlet of indoor unit by rivets. For outlet dimensions, see outline drawing of the unit. Round air conduit should be connected to a piece of transitional air conduit before it is connected to air outlet of indoor unit, the other end of it can be separately connected to air conduit window or connected to air conduit window after air flow diversion, and the total length should not be over 6m. As shown in figure below, air speeds at all air outlets should be set to basically consistent so as to meet the room air-conditioning requirements.

Air inlet

Indoor unit

Transitional air conduit

Outlet pipe

Air-outlet window

Return Air Pipe Installation

In case sidewise air intake is adopted, return air pipe should be fabricated and rivet-connected

to return air orifice, and the other end of it should be connected to return air window.

In case of underside air intake, purchase or fabricate a section of pleated canvas air conduit serving as transition joint for return air orifice and return air window. in this way, it can be freely adjusted according to height of indoor ceiling board; in addition, during operation of the unit , canvas air conduit may avoid vibration of ceiling board, as shown in figure below.

Unit

Rivet

Installation mode for underside air intake

Return air pipe

Canvas air conduit

Return air pipe

Return air window

Installation mode for sidewise air intake

Rivet

Unit

Tips for installation of return air pipe and outlet pipe

To minimize energy loss occurring in transmission process and condensed water during heating

operation, return air pipe and outlet pipe should be equipped with heat-insulating layer as shown in the

Heat preserving

Air conditionerAir conditioner

Plastic pinPlastic pin

Heat preserving

wool

Tin foil

Plastic pin capPlastic pin cap

Page 10

NOTE:Ensure sufficient space

for installation and repair.

(see the picture for details)

100mm

Air outlet side

Canvas tunnel

Return air pipe and outlet pipe should be fixed to floor precast slabs by iron stand; in addition, all ports of the air conduit should be tightly sealed by gasket cement, and it is advisable that the edge clearance of return air pipe should be 150mm at least.

Drain pipe for condensed water should be installed with minimum gradient of 1 , and the

drain pipe should be insulated with heat-preserving pipe casing as well.

Installation diagram for indoor unit

Unit

Suspension rod

Return air pipe

Canvas air conduit

Return air window

including filter screen

Transitional air conduit

Outlet pipe

Air-out window

NOTE: Hang the nut inside the U slot of the installation panel.To confirm

level degree with gradienter . Leaning downside toward non-draining side is prohibited. (see below)

Level Indicator

Hanging Screw Bolt

Hanging Ear

Must Be Fixed Tight

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OUTDOOR UNIT INSTALLATION

Outdoor Unit Installation Instructions

Select installation location

The outdoor unit should be installed in a location that meets the following requirements:

Keep the outdoor unit as close to the indoor unit as possible. Make sure there is enough space for installation and maintenance. The installation area must be dry and well ventilated. Make sure that the location of the unit is not affected by snow, leaf deposits or other

seasonal debris. If possible, provide a awning for this unit. Make sure that the awning does not obstruct the air flow.

There must be enough space to install connecting pipes and cables and access them for maintenance.

The area must be free of combustible gases and chemicals.The length of pipeline between outdoor unit and indoor unit shall not exceed the maximum allowable pipeline length.

If possible, do not install the unit in direct sunlight. If possible, make sure the device is away from the property of your neighbors so that

the noise from the device does not interfere with them. Air inlet and air outlet shall not be blocked or exposed to strong wind.If the location is

exposed to strong winds (for example, near the coast), you must place the unit against the wall to block the wind. If necessary, use a sunshade.

Install indoor and outdoor equipment, cables and wires at least 1 meter away from TV or radio to prevent static electricity or image distortion. Depending on the radio waves, a distance of 1 meter may not be enough to eliminate all interference.

Strong wind

CAUTION

Be sure to remove any obstacles that may block air circulation. Make sure you refer to Length Specifications to ensure there is enough room for installation and maintenance.

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Body Dimensions

DCE

MODE

18-24K

30-42K

48K

60K

A B

845 586

940

938 605

347

600 375

410

Install Outdoor Unit

Fix the outdoor unit with anchor bolts (M10)

600mm

372

400

440

342

340

417

312

338

372

700

885

1250

1369

600mm

Bolt

4 pieces for one unit

Bolt

4 pieces for one unit

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NOTE: The minimum distance

between the outdoor unit and walls described in the installation guide does not apply to airtight rooms. Be sure to keep the unit unobstructed In at least two of the three directions (Front,Left,Right). (As shown on the right)

>30

0/1

1.8 "

>2000/78"

Outdoor unit condensed water drainage(Optional)

The condensed water and the ice formed in the outdoor unit during heating operation can be drained away through 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.

>600/2

>60

>300/11.8"

0/23.6"

Drilling Hole In Wall

You must drill a hole in the wall for the refrigerant piping, and the signal cable that will connect the indoor and outdoor units.

1. Determine the location of the wall hole according to the location of the outdoor unit.

2. Use a 65 mm (2.5 ") core drill to drill holes in the wall.

3. Place the cuff on the hole. This protects the edge of the hole and helps seal the hole when the installation process is complete.

NOTE: When drilling the wall hole, make sure to avoid wires, plumbing, and other sensitive components.

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DRAINPIPE INSTALLATION

CAUTION

Insulate all piping to prevent condensation. Do not pull on the drain strongly, as this may cause it to disconnect. If the drain is bent or installed incorrectly, water may leak and cause the water level switch to fail.In heating mode, the outdoor unit will drain water. Make sure that the drain hose is placed in a suitable area to avoid water damage and slippage due to freezen drain water. The drainpipe is used to drain water. Improper installation may cause damage to equipment and property.

Indoor Drainpipe Installation

Install the drainpipe as shown below.

1.Attach the mouth of the drain hose to the unit's outlet pipe.Sheath the mouth of the hose and clip it firmly with a pipe clasp.

2.Cover the drainpipe with heat insulation to prevent condensation and leakage.

1m~1.5m

Lean Downward over 1/100

Support

Flexible Hose

Attached Heat-insulation Material

Hose band

Heat-insulation Material

Polyvinyl Chloride PipeField-arranged

3.Using a 65-mm (2.5")core drill, drill a hole in the wall. Make sure that the hole is drilled at a slight downward angle, so that the outdoor end of the hole is lower than the indoor end by about 12mm (0.5") This will ensure proper water drainage (as shown). Place the protective wall cuff in the hole. This protects the edges of the hole and will help seal it when you finish the installation process.

4. Pass the drain hose through the wall hole.Make sure the water drains to a safe location where it will not cause water damage or a slipping hazard.

Wall

NOTE: When drilling the wall hole,

Outdoor Indoor

12(0.5")

Drill a hole in the wall

make sure to avoid wires, plumbing, and other sensitive components. The drainpipe outlet should be at least 50mm (1.9") above the ground. If it touches the ground, the unit may become blocked and malfunction.

NOTE:

When using an extended drain, use an additional protective tube to tighten the indoor connection to prevent it from loosening.. The drain pipes shall be sloped down at least 1 / 100 to prevent water from flowing back to the air conditioner. In order to prevent pipe sagging, a support shall be set every 1-1.5m (40-59 ").

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Hight static pressure drainage pipe installation

Warning: Must install drainpipes according to the following figure , avoiding generating condensed water and leakage water.

a.Assemble the main body according to Figure .

b.The opening of drainpipes can be installed on the leftside or the right side . Could remove

the drainstopper and put it on the left side or the right side.

c.For the best effect, should keep pipes as short as possible. Tilt the pipes to ensure the flow

of fluid.

d.Make sure the drainpipes have admirable heat insulation.

e.It is necessary to install a trap near the opening of the drainpipe,so that when the machine is

working, the pressure in the inside of the machine is lower than atmospheric pressure. If there isn't a elbow , the water will splash and the pipe will produce a bad smell.

f.keep straightness of drainpipes so as to remove dirt.

g.Seal the drainpipe on the other side of the machine , then wrap up the drainpipe in the

heat-barriermaterials .

h.Put water into the drain pan to test whether the water can be discharged swimmingly.

i.In humid conditions , please must use a add-on drain pan(commercially available) to cover

the whole area of the indoor unit.

Indoor unit

Heat insulation

Site Preparation

Add-on drain pan

(sold separately)

Drain stopper

Tilt

Trap

Heat insulation

Site Preparation

The structure of the drainpipe

should be convenient for clean.

Bottom of unit body

Unit:mm

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Refrigerant Piping Connection

SAFETY PRECAUTION

WARNING

All field piping must be completed by certified technicians and must comply with local and national regulations.

When installing the refrigeration system, ensure that air, dust, moisture or foreign substances do not enter the refrigerant circuit. Contamination in the system may cause poor operating capacity,high pressure in the refrigeration cycle, explosion or injury.

When the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration in the room from exceeding the safety limit when the refrigerant leaks. If the refrigerant leaks and the concentration exceeds its appropriate limit, it may cause a risk of hypoxia.

If refrigerant leaks during installation, ventilate the area immediately. The leaked refrigerant gas is toxic and flammable. After completing the installation work, make sure that there are no refrigerant leaks.

Pipe dimension and ways of installation

Outdoor pipe dimension and ways of install (in sequence of cooling capacity

Copper Pipe for Air ConditionerPipe Material

Model

Size(mm)

Liquid side

Gas side

NOTE: Ensure that the length of the refrigerant pipe, the number of bends, and

18k-24k

f 6.35(1/4inch)

f 12.7(1/2inch)

30k-42k

f 9.52(3/8inch)

f 15.8(5/8inch)

48k-60k

f 9.52(3/8inch)

f 15.8(5/8inch)

the drop height between the indoor and outdoor units meets the requirements

The maximum length and drop height based on models. (Unit: m/ft.)

Conventional pipe, cooling capacity 24KBtu/h

Longest pipe(L)

Maximum height drop

Conventional pipe, cooling capacity 24K- 36KBtu/h

Height drop between indoor and outdoor unit

Longest pipe(L)

Maximum height drop

Conventional pipe, cooling capacity 36KBtu/h

Height drop between indoor and outdoor unit

Longest pipe (L)

Maximum height drop

Height drop between indoor and outdoor unit H

Allowed value

30/98.4

20/65.6

Allowed value

50/164

25/82

Allowed value

65/213

30/98.4

Outdoor Unit

Oil Return

Longest PipeL

Height Drop between

indoor and outdoor unitH

Indoor Unit

Page 17

Oil Traps

CAUTION

1 If the indoor unit is installed higher than the outdoor unit:

If oil flows back into the outdoor unit's compressor, this might cause liquid compression or deterioration of oil return. Oil traps in the rising gas piping can prevent this. An oil trap should be installed every 1 0m (32.Sft) of vertical suction line riser.

Indoor unit

Gas piping

Oil trap

Outdoor unit

Liquid piping

10m/32.8ft

2 If the outdoor unit is installed higher than the indoor unit:

It is recommended that vertical suction risers not be upsized. Proper oil return to the compressor shouId be maintained with suction gas velocity. If velocities drop below

7.62m/s(1 500fpm (feet per minute)), oil return will be decreased. An oil trap should be installed every 6m(20ft) of vertical suction line riser.

Outdoor unit

Gas piping

6m/20ft

Indoor unit

6m/20ft

Liquid piping

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Refrigerant Piping Connection lnstructions

CAUTION

DO NOT install the connecting pipe until both indoor and outdoor units have been installed.

1 If the indoor unit is installed higher than the outdoor unit:

Insulate both the gas and liquid piping to prevent water leakage. DO NOT deform pipe while cutting.Be extra carefull not to damage,dent,or deform the pipe while cutting.This will drastically reduce the heating efficiency of the unit

Cut pipes

When preparing refrigerant pipes, take extra care to cut and flare them properly. This will ensure efficient operation and minimize the need for future maintenance.

1.Measure the distance between the indoor and outdoor units.

2.Using a pipe cutter, cut the pipe a little longer than the measured distance.

Remove burrs

slant roughess

Burr

Burrs can affect the air-tight seal of refrigerant piping connection. They must be completely removed.

1.Hold the pipe at a downward angle to prevent burrs from falling into the pipe.

2.Using a reamer or deburring tool, remove all burrs from the cut section of the pipe.

Flare pipe ends

Proper flaring is essential to achieve an airtight seal.

1.After removing burrs from cut pipe, seal the ends with PVC tape to prevent foreign materials from entering the pipe.

2.Sheath the pipe with insulating material.

3.Place flare nuts on both ends of pipe. Make sure they are facing in the right direction, because you can't put them on or change their direction after flaring.

Point down

Pipe

Reamer

pipe

Flare nut

Page 19

4.Remove PVC tape from ends of pipe when ready to perform flaring work.

5.Clamp flare form on the end of the pipe. The end of the pipe must extend beyond the flare form.

6.Place flaring tool onto the form.

7.Turn the handle of the flaring tool clockwise until the pipe is fully flared. Flare the pipe in accordance with the dimensions

Flare form

Pipe

Outside Diameter

7/16"

5/8"

3/4"

7/8"

17/16"

Tightening Torque

18-20N m (183-204kgf.cm)

25-26N m (255-265kgf.cm)

35-36N m (357-367kgf.cm)

45-47N m (459-480kgf.cm)

65-67N m (765-867kgf.cm)

Flare dimension(A) (unit:mm/inch)

8.4/0.33 8.4/0.33

13.2/0.52 13.5/0.53

16.2/0.64 16.5/0.65

19.2/0.76 19.7/0.78

23.2/0.91 23.7/0.93

90 4

8. Remove the flaring tool and flare form,then inspect the end of the pipe for cracks and even flaring

NOTE:Connect the copper pipes to the indoor unit first, then connect it to the outdoor unit.

You should first connect the low-pressure pipe, then the high-pressure pipe.

1 When connecting the flare nuts, apply a thin coat of refrigeration oil to the flared ends of the pipes. 2 Align the center of the two pipes that you will connect. 3 Tighten the flare nut as tightly as possible by hand. 4 Using a spanner, grip the nut on the unit tubing.

NOTE: Use two spanners to

connect the pipe with indoor /outdoor pipes to avoid the copper pipe cracking.

5 While firmly gripping the nut, use a torque wrench to tighten the flare nut according to the torque values.

CAUTION

Ensure to wrap insulation around the piping. Direct contact with the bare piping may result in

1 If the indoor unit is installed higher than the outdoor unit:

burns or frostbite. Make sure the pipe is properly connected. Over tightening may damage the bell mouth and under tightening may lead to leakage .

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6 After connecting the copper pipes to the indoor unit, wrap the power cable, signal cable and the piping together with binding tape.

NOTE:While bundling these items together, DO NOT intertwine or cross the signal cable

with any other wiring.

Drain pipe outlet should be led to a place that can avoid affecting the environment.

Liquid-pipe heat preservation

Liquid pipe

Drain pipe

7 Thread this pipeline through the wall and connect it to the outdoor unit. 8 Insulate all the piping, including the valves of the outdoor unit. 9 Open the stop valves of the outdoor unit to start the flow of the refrigerant between the indoor and outdoor unit.

CAUTION

Check to make sure there is no refrigerant leak after completing the installation work. If there

1 If the indoor unit is installed higher than the outdoor unit:

Heavy-current cable

Gas-pipe heat pre ser vat ion

Gas pipe

Light current cable

is a refrigerant leak, ventilate the area immediately and evacuate the system (refer to the Air Evacuation section of this manual) .

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ELECTRIC WIRING

SAFETY PRECAUTION

WARNING

Always disconnect the power supply before working on the unit.

All electrical wiring must be done according to local and national regulations.

The wiring must be carried out by a certified technician. Improper connection may cause electrical failure, personal injury and fire.

This unit must use independent circuit and single outlet. Please DO NOT plug other equipment or chargers into the same outlet. If the circuit capacity is insufficient or the electrical system fails, it will cause electric shock, fire, unit and property loss

Connect the power cord to the terminal and secure it with the wiring clamp. Improper connections may cause fire

Make sure all wiring is correct and the control box cover is installed correctly. Otherwise, may cause overheating at the connection points, fire, and electrical shock.

Ensure that main supply connection is made through a switch that disconnects all poles, with contact gap of a least 3mm (0.118").

DO NOT modify the length of the power cord or use an extension cord.

CAUTION

Connect the outdoor wires before connecting the indoor wires.

1 If the indoor unit is installed higher than the outdoor unit:

Be sure to ground the equipment. The grounding wire shall be away from gas pipeline, water pipe, lightning rod, telephone or other grounding wire. Improper grounding may cause electric shock DO NOT connect the unit with the power source until all wiring and piping is completed. Please make sure not to cross the wire with the signal wire, which will cause distortion and interference. The unit must be connected to the main outlet. Normally, the power supply must have a low output impedance of 32 ohms. No other equipment should be connected to the same power circuit.

NOTE:The type of fuse for controller of indoor unit is 50CT/524 rated specification is

T 5A,250VAC.Fuse for the whole unit is not supplied by the manufacturer,so the installer must employ a suitable fuse or other over-current protective device for the power supply circuit according to the maximum power input as required.

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Outdoor Unit Wiring

WARNING

Please turn off the main power of the system before performing any electrical or wiring work

CAUTION

Please wire in strict accordance with the wiring diagram(found inside the electrical box cover). The refrigerant circuit can become very hot. Keep the interconnection cable away from the copper tube.

Prepare The Cable For Connection

1 You must first choose the right cable size before preparing it for connection. Be sure to use H07RN-F cables. 2 Using wire strippers, strip the rubber jacket from both ends of signal cable to reveal about 15cm (5.9") of the wires inside. 3 Strip the insulation from the ends of the wires. 4 Using a wire crimper, crimp u-lugs on the ends of the wires.

Minimum Cross-Sectional Area of Power and Signal Cables

Rated Current of Appliance(A)

7-13 13-18 18-25 25-30

North Americ

AWG

18 16 14

12 10

Rated Current of Appliance(A)

6-10 10-16 16-25 25-32

Other Regions

Nominal Cross-Sectional Area(mm )

0.75 1

1.5

2.5 4

Wiring Instructions

1 Remove the electric cover of the outdoor unit.

Electric control box cover

Power supply wire

Signal connecting wire

Thermal insulation Materials

Connecting pipes

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 control box cover.

Page 23

Indoor Unit Wiring

Prepare The Cable For Connection

1 Using wire strippers, strip the rubber jacket from both ends of signal cable to reveal about 15cm (5.9") of the wires inside. 2 Strip the insulation from the ends of the wires. 3 Using a wire crimper, crimp u-lugs on the ends of the wires.

Wiring Instructions

1. Remove the electric cover of the outdoor unit.

2. Thread the power cable and the signal cable through the wire outlet

ring of the box

the electric control box cover

wire diagram in the back of the electric control box cover

rubber

3.Connect the power connection cord to the terminal board. Wiring should fit that of outdoor unit.

4.Fix the power connection cord with wire clamp.

5.Confirm if the wire has been fixed properly.

6.An efficient earth connection must be ensured.

7.Reinstall the

electric cover of the indoor unit.

8.Wrap the power cable,signal cable and the piping together with binding tape.

MODEL(Btu/h)MODEL(Btu/h)

POWER (indoor)

POWER (outdoor)

PHASE

VOLT

PHASE

VOLT

24K24K 30K30K 36K36K 36K36K 42K42K

1 Phase 1 Phase 1 Phase 1 Phase 1 Phase

220-240V 50Hz

1 Phase 1 Phase 1 Phase 3 Phase 3 Phase

220-240V 50Hz

380-415V 50Hz

220-240V 50Hz

380-415V 50Hz

A/C Power Specification

Page 24

AIR EVACUATION

Safety Precautions

CAUTION

Use a vacuum pump with a gauge reading lower than -0.1 MPa and an air discharge capacity above 40L/min. The outdoor unit does not need vacuuming. DO NOT open the outdoor unit's gas and liquid stop valves. Ensure that the Compound Meter reads -0.1 MP a or below after 2 hours. If after three hours of operation and the gauge reading is still above -0.1 MPa, check if there is a gas leak or water inside the pipe. If there is no leakage, perform another evacuation for 1 or 2 hours.

DO NOT use refrigerant gas to evacuate the system.

Evacuation Instructions

Manifold valve

Hihandle

Discharged hose

Vacuum pump

NOTE:Before using manifold pressure

gauge and vacuum pump, please read their operating instructions and be familiar with how to use the manual correctly

Multi-function gauge pressure gauge

-76cmHg

Lohandle

Discharged hose

Low presasure valve

High pressure valve

1. Connect the hose of manifold pressure gauge to the maintenance port on the low pressure valve of outdoor unit.

2. Connect another hose from manifold pressure gauge to vacuum pump.

3. Open the Low Pressure side of the manifold gauge.Keep the High Pressure side closed.

4. Turn on the vacuum pump to empty the gas in the system.

Run the vacuum pump for at least 15 minutes, or until the compound meter reads

76cmhg (- 1 X105pa).

6. Close the low pressure side of the manifold pressure gauge and close the vacuum pump.

7. Wait for 5 minutes and check whether the system pressure changes.

NOTE:If there is no change in system pressure, unscrew the cap from the high pressure

valve.If there is a change in system pressure, there may be a gas leak.

Page 25

8. Insert a hex wrench into the high-pressure valve and open the valve by turning the wrench in a 1 /4 counter clockwise turn. Listen for any gas coming out of the system and close the valve after 5 seconds.

Connection pipe nut

Cap

Valve body

Valve stem

9.Observe the pressure gauge for one minute to make sure that the pressure does not change. The pressure gauge should read slightly above atmospheric pressure

10. Remove the charge hose from the service port.

Using hexagonal wrench, fully open both the high pressure and low pressure valves.

11.

12. Tighten valve caps by hand, then tighten it using the proper tool.

CAUTION

When opening valve stems, turn the hexagonal wrench until it hits against the stopper. DO NOT

1 If the indoor unit is installed higher than the outdoor unit:

try to force the valve to open further.

Additional Refrigerant Charge

CAUTION

Refrigerant charging must be done after wiring, vacuuming and leak testing. Do not exceed the maximum allowed amount of refrigerant or overcharge the system. This will damage or affect the function of the device. Charging with mismatched refrigerant can cause an explosion or an accident. Make sure that a suitable refrigerant is used. The refrigerant container must be opened slowly. Always use guards when charging the system. Do not mix refrigerant types.For R290 or R32 refrigerant models, when adding refrigerant to the air conditioner, ensure the safety of the conditions in the area by controlling flammable materials.

Some systems require additional refrigerant charge depending on the length of the pipe. The standard pipe length of this air conditioner is 5 meters (16 feet). The following table can be used to calculate the additional refrigerant to be charged:

Liquid pipe diameter

Additional charge for 1m/ft pipe(R32)

Additional charge for 1m/ft pipe(R410A)

6.35(1/4")

12g/0.13oZ

9.52(3/8")

24g/0.26oZ 40g/0.42oZ

15g/0.16oZ 30g/0.32oZ 65g/0.69oZ

¦ Õ 1/2¡ å

12.7(1/2")

Page 26

TEST RUN

Precaution

The test run needs to be performed after the entire system is completely installed. Before performing the test, please confirm the following points:

a. The indoor unit and outdoor unit are installed correctly according to the instructions b. The electrical wiring is properly connected. c. Make sure there are no obstacles near the air conditioner. These obstacles may cause

the air conditioner to malfunction or degrade performance. d. The refrigeration system has no leakage. e. The drain pipe has been installed as required

CAUTION

Failure to perform the test run may result in unit damage,property damage or even personal injury.

Test Run Intructions

1. Open both the liquid and gas stop valves. 2

. Turn on the main power switch and allow the unit to warm up.

3. Set the air conditioner to COOL mode.

4. For the Indoor Unit a. Ensure the remote control and its buttons work properly. b. Double check to see if the room temperature is being registered correctly.

. Ensure the indicators on the remote control and the remote controller receiver

work properly. d. Ensure the manual buttons on the indoor unit works properly. e. Check to see that the drainage system is unimpeded and draining smoothly. f . Ensure there is no vibration or abnormal noise during operation.

5. For the Outdoor Unit a. Check to see if the refrigeration system is leaking. b. Make sure there is no vibration or abnormal noise during operation. c. Ensure the wind, noise, and water generated by the unit do not disturb your neighbors

or pose a safety hazard.

NOTE: If the unit malfunctions or does not operate according to your expectations, please

refer to the Troubleshooting section of the Owner's Manual before calling customer service.

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OWNER'S MANUAL

SAFTY PRECAUTION

Read the following " PRECAUTIONS" carefully before installation. The caution items stated here must be followed because these important contents are related to safety. The meaning of each indication used is as below. Incorrect installation due to ignoring of the instruction will cause harm or damage, and the seriousness is classified by the following indications.

WARNING

CAUTION

NOTE :

1. Injury means causing harmed, burned, electrical shocked, but not serious for hospitalization.

2. Damage of property means disrepair of property, material.

Carry out test running to confirm that no abnormality occurs after the installation. Then, explain to user the operation, care and maintenance as stated in instructions. Please remind the customer to keep the operating instructions for future reference.

WARNING

After installation, ensure there are no refrigerant leaks and that the unit is operating properly. Refrigerant is both toxic and flammable and poses a serious health and safety risk.

Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fire.

Use the attached accessories parts and specified parts for installation. Otherwise, it will cause the set to fall, water leakage, fire or electrical shock.

Install at a strong and firm location which is able to withstand the set's weight. If the strength is not enough or installation is not properly done, the set will drop and cause injury.

For electrical work, follow the local national wiring standard, regulation and this installation instructions. An independent circuit and single outlet must be used. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or fire.

This indication shows the possibility of causing death or serious injury.

This indication shows the possibility of causing injury or damage to properties only.

When carrying out piping connection, take care not to let air or other substances other than the specified refrigerant go into refrigeration cycle. Otherwise, it will cause lower capacity, abnormal high pressure in the refrigeration cycle, explosion and injury.

Engage dealer or specialist for installation. If installation done by user is defective, it will cause water leakage, electrical shock or fire.

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WARNING

The appliance disconnection must be incorporated with an all-pole disconnection device in the fixed wiring in accordance with the wiring rules.

Any person who is involved with working on or breaking into the refrigerant circuit should hold a current valid certificate from an industry-accredited assessment authority, which authorises their competence to handle refrigerants safely in accordance with an industry recognised assessment specification.

Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants.

The equipment shall be properly stored to prevent mechanical damage from occurring.

Keep ventilation openings clear of obstruction.

Grounding is necessary. It may cause electrical shock if grounding is not perfect.

Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding of the unit, it may cause fire.

NOTE: The following informations are required for the units adopt R32/R290 Refrigerant.

The appliances shall be stored in the room without continuous working ignition source (for example: open flames, an operating gas appliance or an operating electric heater).

Do not pierce or burn the appliances.

Note that the refrigerant may be odorless.

Compliance with national gas regulations shall be observed.

Appliance shall be stored in a well-ventilated area with room size corresponding to the specified operation area.

Appliance shall be installed, operated and stored in a room with a floor area larger than X m , installation of pipe-work shall be kept to a minimum X m (Please see the following form ).

The appliance shall not be installed in an unventilated space, if that space is smaller than Xm (Please see the following form ).Spaces where refrigerant pipes shall be compliance with national gas regulations.

Model

(Btu/h)

24K

30K-36K

42K

Amount of refrigerant

Amount of refrigerant to be charged(kg)

to be charged(kg)

1.25

2.2-2.4

2.8

maximum installation

maximum installation height(m)

height(m)

2.2m

Minimum room

Minimum room area(m )

area( )2m

Page 29

CAUTION

Do not operate the air conditioner or remote control with wet hands. This may cause electric shock. When the wind deflector moves, do not touch the air outlet with your hands. Fingers may be pinched or the machine may be damaged. If the air conditioner is used with other heating equipment, please adequately ventilate to avoid insufficient oxygen in the room After prolonged use, please check the indoor unit for damage. If the indoor unit is aged or damaged, it may fall or cause personal injury. Do not expose heat-producing appliances to cold air or place them under the indoor unit. This may cause incomplete combustion or deformation of the unit due to the heat. Do not place items that might be affected by moisture damage under the indoor unit. Condensation can occur at a relative humidity of 80%. Do not check the equipment yourself. Please have it checked by an authorized dealer. Do not use air conditioners for preservation purposes (storage of food, plants, animals, art, etc.). Do not touch the evaporator coil inside the indoor unit. The evaporator coil is very sharp and may cause injury. Do not climb or place objects on top of the outdoor unit. Do not let children play with the air conditioner.

Note about Fluorinared Gasses

1. This air conditioner contains fluorinated gas. Refer to the relevant label of the unit itself for specific information on the type and quantity of gas.

2. The installation, repair, maintenance and repair of the device must be carried out by qualified technicians.

3. Unloading and recycling of air conditioner must be carried out by certified technicians.

4. The system must be checked for leaks at least every 12 months.

5. When checking the air conditioner for leakage, it is strongly recommended that all checks be recorded

Explanation of symbols displayed on the indoor unit or outdoor unit (applicable to the unit adopts R32/R290 Refrigerant only):

This symbol shows that this appliance uses a flammable

WARNING

CAUTION

refrigerant. If the refrigerant is leaked and exposed to an external ignition source, there is a risk of fire.

This symbol shows that the operation manual shouId be read carefully.

This symbol shows that a service personnel should be handling this equipment with reference to the installation manual.

This symbol shows that information is available such as the operating manual or installation manual.

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PARTS AND FUNCTIONS

Indoor Unit

O PTIO

ECO

TURBO M ODE

FAN

Outdoor Unit

³ ö · ç³ ö · ç

Air Outlet

Refrigerant Pipe Junction

Installation Hook

Drainage PIpe

Air Return

Filter

Remote controller

Remote controller receiver

Refrigerant connection pipe

Connecting cord

Stop valve

Air Outlet grille

Classical wall controller

(Optional)

Requirements

Notice that the air inlet/outlet must not be choked up. If chokeup takes place, the

air conditioner behavior may be affected, or air conditioner cannot run because of actuation of protector.

When outside temperature is below 0 (32 ),we strongly recommend keeping the unit plugged in at all time to ensure smmoth ongoing performance.(For outdoor unit with auxiliary electric heater.

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Use the air-conditioner under the following temperature:

MODE

COOL mode

HEAT mode

DRY mode

If the air conditioner runs for a long time in "COOLING" or "DRY" mode at air relative humidity higher than 80% (doors or windows opened),dew may generate and drip near air outlet.

Room Temperature

17 -32 (62 -90 )

0 -30 (32 -86 )

17 -32 (62 -90 )

Outdoor Temperature

-15 -50 (5 -122 )

-15 -24 (5 -76 )

0 -50 (32 -122 )

Noise pollutionOperating condition

Install the air conditioner in a place that can bear its weight in order to operate more quietly.

Install the outdoor unit in a place where the air discharged and the operation noise do not annoy your neighbors.

Do not place any obstacles in front of the outlet of the outdoor unit for fear it affects operation and increases the noise level.

Features of Protector

The protective device will trip at following cases.

Stop the appliance and restart it at once or change other modes during operation, you have to wait 3 minutes before restarting.

After switching on the power circuit breaker and then turn on the air conditioner at once, you have to wait about 3 minute/20 seconds (some models).

In case all operations have stopped, you need

Press "ON/OFF" button again to restart it.

Set TIMER once again if it has been canceled.

Feature of HEATING mode

Preheat

2-5 minutes are necessary to preheat the indoor heat exchanger at the beginning of "HEATING" operation, lest cold air be discharged.

Defrost

In "HEATING" operation the appliance will defrost automatically. This procedure lasts 2 10 minutes, then returns to "HEATING" mode automatically. During defrosting, indoor fan stop running and return to heating mode operation automatically when defrosting has finished.

Inspection

After a long time of operation, the air conditioner should be inspected for the following items.

Abnormal heating of the power supply cord and plug or even a burnt smell.

Abnormal operating noise or vibration. Water leakage from indoor unit. Metal cabinet electrified . Stop using the air conditioner if above

problem happened. It is advisable that the air conditioner should be given a detail check-up after using for five years even if none of the above happen.

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REMOTE CONTROLLER RECEIVER

Nixie tube

Running light Timing light

Defrosting/ preheat light

Manual Switch

warning light

Display function declaration :

LED light the state of running light

When powered-on the first time, the running light twinkles, while the nixie tube does not lit. When started-up normally, the running light lights on, while the nixie tube shows the designed temperature. When operated normally, the running light lights on, while the nixie tube shows the designed temperature. When closed down, both LED and nixie tube are gone out.

LED light the state of Timing light

When timing set, the timing light lights on, and the nixie tube flash shows the time setting within 5 seconds, then shows the designed temperature. When without time setting, the timing light gone out, while the nixie tube back to the original state. LED light the state of defrosting/preheat light When in the state of defrost, oil return, cold-wind proof, the defrosting/preheat light lights on, while the nixie tube shows the designed temperature. (One-driven-one does not show the oil return state). When out of the state of defrost, oil return, cold-wind proof, the defrosting/preheat light gone out,while the nixie tube shows the designed temperature.(One-drive-one dose no t show the oil return state).

LED light the state of warning light

When nixie tube shows E* or P*, the running lights gone out, while the warning light lights on.

2.Trouble display of outdoor unit

(1)During standby, the digital tube displays the numbers of indoor unit currently connected and communicating.

(2)When the compressor operates, the digital tube displays the frequency value of the inverter compressor;

(3)The digital tube displays dxx during defrosting; The digital tube displays Cxx during oil return

(4)During trouble protection, the information code displayed by the digital tube.

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MAINTAINANCE

SAFETY PRECAUTION

WARNING

Make sure all wires are properly connected. Failure to connect the wires according to the instructions may result in electric shock or fire. Make sure to install the drain hose according to the instructions. Otherwise, it may cause leakage and cause personal and property damage Please contact an authorized service technician for repair or maintenance. Incorrect repairs and maintenance may cause water leakage, electric shock or fire. Please replace the blown fuse with a fuse of the specified specification, otherwise it may cause circuit damage or electrical fire. Do not disassemble or clean the filter yourself. Disassembly and maintenance must be performed by certified technicians.

CAUTION

Always turn off your air conditioning system and disconnect the power supply before cleaning or maintenance. DO NOT use chemicals or chemically treated cloths to clean the unit. DO NOT use benzene, paint thinner, polishing powder or other solvents to clean the unit. They can cause the plastic surface to crack or deform. DO NOT wash the unit under running water. Doing so causes an electrical hazard. DO NOT use water hotter than 50 ( (114 ) to clean the filter. This can cause the filter to become deformed or discolored. Clean the unit using a damp, lint-free cloth and neutral detergent. Dry the unit with a dry,lint-free cloth.

INDOOR UNIT MAINTANANCE INSTRUCTION

NOTE:The filter prevents dust and other particles from entering the indoor unit. Dust

accumulation will reduce the efficiency of the air conditioner. For best efficiency, clean the air filter every two weeks. If you live in a dusty area, you should clean the air filter more frequently. If the filter is severely clogged and cannot be cleaned, replace it with a new filter.

1.Remove the air filter. A.

For your purchasing unit is a rear ventilated one(Fig A), please remove the filter fixed screws (2screws) and take down the filter a way from the unit. B.For your purchasing unit is a descensional ventilated one(Fig B), please push the filter up slightly to let the position retainer escape away from the flange fixed holes, and take off the filter according to the arrow direction shows in the following fig B.

2.Clean the air filter by vacuuming the surface or washing it in warm water with mild detergent. A.If using a vacuum cleaner, the inlet side should face the vacuum. B. If using water,the inlet side should face down and away from the water stream.

3.Rinse the filter with clean water and allow it to air-dry. DO NOT let the filter dry in direct sunlight.

4.Reinstall the filter.

Page 34

A B

NOTE:For households with animals, you must wipe the grille regularly to prevent

animal hair from obstructing the airflow.

PREPARATION FOR PERIODS OF NON-USE

Maintenance after Extended Non-Use

1. Remove all obstacles in front of the ventilation holes of indoor and outdoor units.

2. Clean the air filter of the indoor unit. Reinstall the filter to its original location.

3. Turn on the main power switch 12 hours before operating the equipment.

Storing the Unit While Not In Use

1. Run the product in fan mode for 12 hours in a warm room to dry it and prevent mold.

2. Turn off the power of the device and unplug the power plug.

3. Before storing, clean the air filter according to the instructions in the previous section.

4. Remove the battery from the remote control.

WARNING

If the refrigerant leaks, turn off the air conditioner and any combustible heating devices, ventilate the room and call your dealer immediately. Refrigerant is both toxic and flammable. DO NOT use the air conditioner until the leak is repaired. When the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit in the event of refrigerant leakage. Concentrated refrigerant causes a severe health and safety threat.

Page 35

TROUBLESHOOTING

CAUTION

If one of the following conditions occurs, switch off the power supply immediately and contact your dealer for further assistance The operation light continues to flash rapidly after the unit has been restarted. The remote control buttons do not work. The unit continually trips fuses or circuit breakers. A foreign object or water enters the air conditioner. The indoor unit leaks. Other abnormal situations.

Common Problems

The following symptoms are not a malfunction and in most situations will not require repairs.

Problem Possible Cause

When the system is turned off or in cooling mode, there will be abnormal noise, and when the drain pump (optional) is running,

Abnormal noises of indoor unit

noise will also be heard.

A squeaking sound may occur after running the unit in HEAT mode due to expansion and contraction of the units plastic parts.

Abnormal noises of outdoor unit

Both the indoor and outdoor units makes noises

Unit does not turn on when pressing ON/ OFF button

The unit changes from COOL mode toFAN mode

The indoor unit emits white mist

The unit will make different sounds based on its current operating mode.

The air conditioner may sizzle during operation. This is a normal phenomenon, which is caused by refrigerant gas flowing through the indoor and outdoor units.

When the air conditioner is turned on, and just stopped or defrosted, a hiss may be heard. This noise is normal and is caused by refrigerant gas stopping or turning.

The unit has a 3-minute protection feature that prevents the unit from overloading. The unit cannot be restarted within three minutes of being turned off.

Cooling and Heating Models: If the Operation light and PRE-DEF (Pre-heating/ Defrost) indicators are lit up, the outdoor temperature is too cold and the unit's anti-cold wind is activated in order to defrost the unit.

The unit changes its setting to prevent frost from forming on the unit. Once the temperature increases, the unit will start operating again.

The set temperature has been reached, at which point the unit turns off the compressor. The unit will resume operating when the temperature fluctu ates again.

In humid regions, a large temperature difference between the room's air and the conditioned air can cause white mist.

Page 36

Problem Possible Cause

Both the indoor and outdoor units emit white mist

Dust is emitted from either the indoor or outdoor unit

When the unit restarts in HEAT mode after defrosting, white mist may be emitted due to moisture generated from the defrosting process.

The unit may accumulate dust during extended periods of non-use, which I will be emitted when the unit is turned on. This can be mitigated by covering the unit during long periods of inactivity.

The unit emits a bad odor

The fan of the outtdoor unit

The unit may absorb odors from the environment (such as furniture, cooking, cigarettes, etc.) which will be emitted during operations.

The unit filters have become moldy and should be cleaned.

During operation, the fan speed is controlled to optimize product operation.

does not operate

Troubleshooting advices

When troubles occur, please check the following points before contacting a repair company.

Problem Possible Cause

Power failure The power switch is off Turn on the power

The unit is not working

Poor cooling performance

The fuse is burned out Replace the fuse Remote control batteries are dead

The unit's 3minute protection has been activated Temperature setting may be higher than the ambient room temperature The heat exchanger on the indoor or outdoor unit is dirty

The air filter is dirty

The air inlet or outlet of either unit is blocked

Doors and windows are open

Excessive heat is generated by sunlight

Low refrigerant due to leak or long-term use

Wait for the power to be restored

Replace the remote control batteries

Wait three minutes after restarting the unit

Lower the temperature setting

Clean the affected heat exchanger

Remove the filter and clean it according to instructions

Turn the unit off, remove the obstruction and turn it back on

Make sure that all doors and windows are closed while operating the unit

Close windows and curtains during periods of high heat or bright sunshine

Check for leaks, re-seal if necessary and top off refrigerant

Solution

Page 37

Problem Possible Cause

There's too much or too little refrigerant in the system

The unit starts and stops frequently

There is air, incompressible gas or foreign material in the refrigeration system.

System circuit is blocked

The compressor is broken

The voltage is too high or too low

Solution

Check for leaks and recharge the system with refrigerant

Evacuate and recharge the system with refrigerant

Determine which circuit is blocked and replace the malfunctioning piece of equipment

Replace the compressor

Install a manostat to regulate the voltage

Poor heating performance

Error Code

The display content of indoor LED

The outdoor temperature is lower than 7 (44.5 )

Cold air is entering through doors and windows

Low refrigerant due to leak or long-term use

The definition of failure or protection

Indoor and outdoor Communication fault

Indoor room temperature sensor fault

Indoor coil temperature sensor fault

Outdoor coil temperature sensor fault

System unnormal

Model allocation error

Indoor DC fan motor fault

Outdoor room temperature sensor fault

Exhaust temperature sensor fault

Frequency conversion module fault

Outdoor Communication fault

Outdoor EEPROM fault

Check for leaks and recharge the system with refrigerant

Make sure that all doors and windows are closed during use

Check for leaks, re-seal if necessary and top off refrigerant

Page 38

The display content of indoor LED

The definition of failure or protection

Outdoor fan motor fault

Indoor EEPROM fault

Water full protection

Communication failure between indoor unit and remote controller

Inverter module protection

Voltage High/Low protection

High current protection

Outdoor fan protection /Out of step/compressor damaged/insufficient refrigerant

High exhaust temperature protection

Anti-cold protection when cooling

coil high temperature protection when cooling

Anti-heat protection when heating

outdoor temperature too high /low protection

Driver board protection

Mode conflict

Exhaust temperature sensor failure protection of outdoor unit

Coil temperature sensor failure protection of outdoor unit

High pressure switch protection

Low pressure switch protection

Insufficient of refrigerant protection

Phase sequence protection

Page 39

DISPOSAL GUIDELINE

This appliance contains refrigerant and other potentially hazardous materials. When disposing of this appliance,the law requires special collection and treatment. DO NOT dispose of this product as household waste or unsorted municipal waste. When disposing of this appliance, you have the following options:

Dispose of the appliance at designated municipal electronic waste collection facility. When buying a new appliance, the retailer will take back the old appliance free of

charge.

The manufacturer will also take back the old appliance free of charge. Sell the appliance to certifid scrap metal dealers.

Disposing of this appliance in the forest or other natural surroundings endangers your health and is bad for the environment. Hazardous substances may leak into the ground water and enter the food chain.

Page 40

Information Servicing

1.Safety Checks

Before starting work on systems containing flammable refrigerants, a safety check must be carried out to ensure that the risk of fire is minimized. Before servicing the refrigeration system, observe the following precautions.

2.Work procedure

Work should be carried out in accordance with specified procedures to minimize the risk of flammable gas leakage.

3.Work area

All mintenance 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 work space shall be sectioned off. Ensure that the conditions within the area have been made safe by control of flammable material.

4.Refrigerant leakage check

Before and during work, the area should be checked with an appropriate refrigerant detector to ensure that technicians understand the concentration of flammable gases. The leak detection equipment used must match the flammable refrigerant.

5.Fire extinguisher preparation

If the refrigeration equipment or any related parts are to be operated at high temperature, dry powder or carbon dioxide fire extinguishers should be equipped

6.Keep away from ignition sources

Anyone engaged in work related to refrigeration systems containing flammable refrigerants shall not use any ignition source. Any ignition source, including smoking, shall be keptaway from the place of installation and maintenance. Failure to do so may result in danger to life or property damage.

7.Ventilation

Make sure the area is open or well ventilated before entering the system or carrying out any hot work. During piping work, a certain degree of ventilation shall be maintained. Ventilation should safely disperse the released refrigerant, preferably from the outside to the atmosphere.

8.Checks to the refrigeration equipment

When changing electrical components, they should be suitable for their purpose and meet the correct specifications. The manufacturer's maintenance and service guidelines should always be followed. If in doubt, please consult the manufacturer's technical department for assistance. For devices using flammable refrigerants, the following checks should be performed:

The charge size is in accordance with the room size within which the refrigerant containing

parts are installed;

Ventilation machinery and vents are operating normally without obstruction; If you use an indirect refrigeration circuit, you should check whether there is refrigerant in

the secondary circuit; the mark on the equipment is still clearly visible.

Indistinct marks and signs should be corrected; The installation location of refrigeration pipes or components should make it not easy to be

exposed to any environment that may corrode refrigerant-containing substances, unless these components are made of inherently anti-corrosion materials or are properly anti-corrosive.

Page 41

.9. Checks to electrical devices

The repair and maintenance of electrical components shall include preliminary safety inspection and component inspection procedures. If there are faults that may endanger safety, do not connect any power source to the circuit until the circuit is satisfactorily handled. If the failure cannot be corrected immediately, but it is necessary to continue the operation, an appropriate temporary solution should be used. This should be reported to the equipment manufacturer in order to inform the parties

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

10. Sealed components maintenance

10.1 During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation.

10.2 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 cable 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.

11.Safe components

Do not impose any permanent inductive or capacitive load on the circuit unless it is ensured that it will not exceed the voltage and current allowed by the equipment in use. This machine safety component is the only type that can be operated in the presence of flammable gases. The test in strument should have the correct rating. Replace components only with parts specified by the manufacturer.

12.Cabling mantainence

Check the cable for wear, corrosion, excessive pressure, vibration, sharp edges, or any other adverse environmental effects. The inspection should also take into account the effects of aging or continuous vibration such as compressors or fans.

13.Detection of flammable refrigerants

Under no circumstances shall potential sources of ignition be used in the searching for Or detection of refrigerant leals.

For systems containing flammable refrigerants, the following leak detection methods are considered acceptable. An electronic leak detector should be used to detect flammable refrigerants, but the sensitivity may be insufficient or may require recalibration. (The testing equipment should be calibrated in an area free of refrigerant.) Make sure that the tester is suitable for the refrigerant. Leak detection equipment should be set as a percentage of the refrigerant LFL, and should be calibrated for the refrigerant used, and confirm the appropriate percentage of gas (maximum 25%). Leak detection fluids are suitable for most refrigerants, but the use of chlorine-containing cleaning agents should be avoided because chlorine may react with the refrigerant and corrode the copper pipes. If a leak is suspected, all open flames should be cleared or extinguished. If it is found that the refrigerant that needs to be brazed leaks, all the refrigerant should be recovered from the system, or be isolated in the system part away from the leakage through the shut-off valve.

Page 42

15.Air evacuation

When breaking into the refrigerant circuit to make repairs of 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 should be recovered in the correct recovery cylinder. OFN should be used to flush the system to ensure the safety of the equipment. This process may need to be repeated several times. Compressed air or oxygen cannot be used for this task. The refrigerant should be recovered in the correct recovery cylinder. OFN should be used to flush the system to ensure the safety of the equipment. This process may need to be repeated several times. Compressed air or oxygen cannot be used for this task. Flushing should be achieved by using OFN to break the vacuum in the system and continue to fill until the working pressure is reached, then evacuate to atmosphere and finally drop to vacuum. This process should be repeated until there is no refrigerant in the system. When using the final OFN charge, the system should be vented to atmospheric pressure for operation. If you want to braze the pipe, this operation is very important. Ensure that the outlet of the vacuum pump does not turn off any ignition source, and there is a ventilation device.

16. Refrigerant charging

In addition to following the normal charging procedure, the following requirements should also be followed:

When using refrigerant charging equipment, please ensure that different refrigerants will not be contaminated. The hose or pipeline should be as short as possible to minimize the refrigerant content.

Refrigerant tank should be kept upright.

Before charging the refrigerant system, make sure it is grounded.

Mark the system when the charge is complete.

Be extra careful to avoid overfilling the refrigeration system.

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

17. About air conditioner removal

Before performing this step, please confirm that the technician is fully familiar with the equipment and has relevant qualifications. It is recommended to safely recycle all refrigerants. Before completing the task, oil and refrigerant samples should be collected. Before the task begins, the power must be disconnected. 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 protetive 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 fromvarious

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).

Page 43

i) Do not exceed the maximum working pressure of the cylinder, even temporarily. j) When the cylinders have been filled correctly and the process completed, make sure that the

cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off.

k) Recovered refrigerant shall not be charged into another refrigeration system unless it has

been cleaned and checked.

18.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.

19.Refrigerant recovery

When removing refrigerant from a system, either for service or decommissioning, it isrecom-

mended good practice that all refrigerants are removed safely.

When tranferring refrigerant into cylinders ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct numbers 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 therecovery of refrigerant). Cylinders shall be complete with pressure relief valve and associated shut-off valves in good working Order

Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.

The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of flammable refrigerants. In addition, a set of calibrated weighing scales shall be available

and in good working order.

Hoses shall be complete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is in satisfactory working order, has beenproperly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt.

The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant Waste Transfer Note arranged. Do not mix refrigerants in recovery units and especially not in cylinders.

If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant. The evacuation process shall be carried out prior to retruning 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.

20.Transportation, marking and storage for units

1. Transport of equipment containing flammable refrigerants

Compliance with the transport regulations

2. Marking of equipment using signs

Compliance with local regulations

3. Disposal of equipment using flammable refrigerants

Compliance with national regulations

4. Storage of equipment/appliances

The storage of equipment should be in accordance with the manufacturer s instructions.

5. Storage of packed (unsold) equipment

Storage package protection should be constructed such that mechanical damage to the equipment inside the package will not cause a leak of the refrigerant charge.The maximum number of pieces of equipment permitted to be stored together will be determined by local regulations.

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