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LG ELECTRONICS
LG ELECTRONICS
R410A Refrigerant
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R410A Refrigerant Characteristic
Item R-22 R-410A
CompositionMono
RefrigerantMixed Refrigerant
(R32:R125 = 50:50)
Ozone Depletion Potential (ODP)
0.0055 0
Global Warming Potential (GWP)
1700 1370
Saturation Pressure
(at 25℃. Psi)150 240
Boiling Point (℃) -40.8 -51.4
LeakageNo change in composition
Composition changes
RechargingLiquid/Gas/Both (Liquid+Gas)
Must be charged in liquid state
R410A vs R22
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R410A Temperature-Pressure Chart
Temp R410A R22
-40° 26 15
-35° 32 19
-30° 40 24
-25° 48 30
-20° 58 35
-15° 70 43
-10° 84 51
-5° 100 61
0° 118 72
5° 136 85
10° 168 99
15° 183 115
Temp R410A R22
20° 210 132
25° 240 150
30° 275 173
35° 312 196
40° 353 222
45° 397 250
50° 446 282
55° 500 315
60° 556 352
65° 618 392
70° 686 435
75° - 480
A temperature-pressure chart can easily be used for charging, refrigerant cycle analysis and diagnosis. R410A is 1.6 times higher vapor pressure than R-22 when saturated.
R410AHIGH PRESSURE
1.6 times higherthan R22
High possibility ofgas leakage
Larger flare size
R22R410A
Problem :
Solution :
Caution during installation :
How its different from R22?
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R410A Procedure
R410A must be charged in liquid state. It’s a mixed refrigerant, if charging in vapor state the composition might changed.
Charge R410A cylinder in upright position to avoid loss in performance.
Caution during installation :
Why?
Liquid
Gas
Liquid
Gas
Right procedure :
Mono Refrigeran
t
Mixed Different ratio
Open Open
Why its different from R22?
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R410A Special Tool
DO NOT mix refrigerants in your tools. Dissimilar oils will become contaminated.
As pressure is high,it is impossible to measure using conventional gauge, To increase pressure resisting strength,hose materials and port size are different.
Why its different from R22?
Caution during installation :
New Tools Applicable to R22 Changes
Gauge ManifoldX
High Pressure : R410A 0.1 ~ 5.3 MPa (R22 ~ 3.5 MPa)Low Pressure : R410A 0.1 ~ 3.8 MPa (R22 ~ 1.7 MPa)
Charge HoseX
R410A : 1/2 UNF 20 threads per inch (R22 : 7/16 UNF)R410A : 5.1 Mpa (51 kgf/ ㎠ ) (R22 : 3.4 Mpa (34 kgf/ ㎠ ))
Vacuum PumpX
Pumps used with CFC and HCFC charged systems may also be used on R410A systems
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R410A Lubrication
The chemistry of R-410A makes it incompatible with mineral based lubricants The preferred lubricants are the Polyolester or Ether based oils. Exposure to the atmosphere must be limited.
Esther oil Mineral oilEther oil
The oil is miscible, so it is very important to remove as much particulates and moisture from the system Vacuum MUST be performed. Moisture can be absorb very easily.
Caution during installation :
Why its different from R22?
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General Operation Logic
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Basic Mode Controls
O operacional Hz depende da condição de carga, como a diferença entre a temperatura ambiente e conjunto ou restrições de frequência.
• Após compressor está desligado, pode reiniciar novamente em 3 minutos o tempo de atraso > proteger condição compressor • No modo de resfriamento há dois casos quando o compressor está desligado (ver gráfico sup.) 1)Em quanto ΔTroom-set is lower than 0.5℃ for 3mins continuously or 2) when ΔTroom-set is lower than 1.5 ℃.
• No modo de aquecimento, quando ΔTroom Maior Conjunto E fazer Que 4 , compressor Ira Parar de ℃trabalhar Há e começar de novo quando ΔTroom conjunto-é inferior a 2 .℃
• Por quê? Para garantir a capacidade de arrefecimento / aquecimento ideal
High ↔ Low High ↔ LowComp Off High ↔ Low High ↔ LowComp Off Comp Off
Thermo OFF
Thermo ONSet temp.
Set temp.-0.5℃
+0.5℃+4℃
+2℃
Thermo OFF
Thermo ON
Temp. Temp.
Comp.Frequency
Comp.Frequency
Modo de refriamento : Modo Aquecimento:
-1.5℃
3min
1)
2)
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Outdoor Temp (℃)
Resfriamento
(Max Step)
Outdoor Temp (℃)
Aquecimento
(Max Step)
Outdoor ≤ 0 3 Outdoor ≤ -7 16
0< Outdoor ≤10 3 -7< Outdoor ≤-2 15
10< Outdoor ≤ 23
4 -2< Outdoor ≤ 4 13
23< Outdoor ≤ 30
10 4< Outdoor ≤ 10 11
30< Outdoor ≤40
12 10< Outdoor ≤21 11
46< Outdoor ≤10
8 21< Outdoor ≤27 5
46< Outdoor 7 27< Outdoor 3
• Uma das restrições de frequência é muitas limite de temperatura exterior.
• Isto significa que o máximo de trabalho Hz para o compressor é limitada pelo ambiente exterior
temperature. Por quê? para proteger o compressor e manter responsabilidade do produto.
Compressor Frequency Restriction :
Basic Mode Controls
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Basic Mode Controls
Defrosting Control :
•Durante o modo de aquecimento, o ciclo é invertido para o ciclo de aquecimento para descongelar o
evaporador
tubo da unidade exterior. Por quê? Para proteger o tubo da unidade exterior do congelamento.
• Em desgelo controle, a amostra. é, que a ventoinha interior, ventilador ao ar livre, ea válvula de 4 vias
estão fora.
• Durante a descongelação, o min. temp. do tubo interior é medido e é comparado com o
apresentar temp. do tubo interior para obter a diferença de que a temperatura interior. (Se a diferença
for
5 ou superior, controlo de descongelação é completada e no modo de aquecimento é levada a cabo ℃
de novo)
Intake Air. Temp
Pipe Temp
ON
ON
Max TempHeating Cycle(40 minutes)
ΔTmax
OFF ON
ON
ON
OFF
OFFON
ON
HOT START End
DefrostTime
ΔTmin=5℃ OverMin Temp
DefrostStart
DefrostEnd
Compressor
Outdoor Fan
Indoor Fan
4_way Valve
Max Temp
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Basic Mode Controls
Hot Start Operation :
• Durante o início de funcionamento de aquecimento, este sistema foi concebido para evitar que o ar frio a partir de serem descarregados, enquanto espera depois de atingir uma certa temperatura (desta vez, ventilador interno está desligado). Após a temperatura interior do tubo atinge 28 (opção), o ar quente vai sair na seguinte ordem da ℃velocidade do ventilador Velocidade baixa velocidade do ventilador -> definido pelo controle remoto• O diagrama de funcionamento é como a seguir
20℃(Option)
28℃(Option)
ON
ON
ON
STOP LOW STOP LOW
Pipe Temp(Indoor) Pipe Temp(Indoor)
Compressor
Outdoor Fan
Indoor Fan
4_way Valve
Set Fan Speed Set Fan Speed
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Basic Mode Controls
Auto Change over Operation :
•O condicionador de ar muda automaticamente o modo de funcionamento de arrefecimento ou com aquecimentoou aquecimento para o arrefecimento para manter a temperatura da sala interior constante.•Quando temp. variar ao longo ± 2 , ar condicionado mantém a temperatura ambiente. em ± 2 ℃
com℃ respeitar para ajustar a temperatura, alterando o modo de arrefecimento ou com aquecimento e vice-versa.
• A temperatura de regulação será automaticamente aumentada de 1 30 minutos℃ mais tarde, e por 2 1 hora mais tarde (arrefecimento / desumidificação saudável)℃• A operação será interrompida depois (1,2,3,4,5,6,7: opção) horas
• Indoor fan control : - cooling/ Healthy Dehumidification/ Auto Mode ▶ Low speed - Heating/Auto Mode ▶ Mid speed
Sleep Timer Operation :
• Quando a entrada de operação de desumidificação pelo controle remoto é recebido, a temperatura do ar de admissão é detectada ea temperatura ambiente é automaticamente ajustado de acordo a temperatura do ar de admissão.
Healthy Dehumidification Operation :
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Basic Features
Different angle of vane for each operation mode:
• Isto é especialmente concebido para proporcionar o fluxo de ar ideal durante cada operação.
• Como o ar frio é mais pesado que o ar quente na mesma umidade. Assim, o fluxo de ar é gerado por o lançamento de mais pesado do ar• Usando o mesmo princípio, é por isso que o ângulo de palhetas do modo de resfriamento é maior do que o modo de aquecimento.
HeatingCooling / Dehumidification
Remote Control Display
Mode Defrost / AutoClean
//
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Processo de instalação.
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Electric Wiring Work
Trial Run
Installation Location
Piping Work
Insulation Work
Vacuum
Finishing Job
Check PointBasicLogic
Symptoms
Precautions ProcessingStandard Length
Leak Test RechargingVacuum Finishing
Indoor Checking Drainage
Outdoor
Joints Welding/Brazing
FixingInst. Plate
Drilling Hole
Setting Indoor
SettingOutdoor
Wiring SpecImproper
CaseConnecting
Wire
Flare Fitting
Wrapping Pipe & Drain
Installation Work Flow
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Installation Location
Piping work & Flare Check
Piping Connection
Electric Wiring Work
Insulation Vacuuming
Test Run Check : Pressure, voltage, current and temperature difference
Fluxo de instalação de passo a passo principal
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Installation Tools
Figure Name Figure Name
Screw driver, Spanner
Vacuum pump
Measuring tape, Knife
Multi-meter
Pincher plier, Nipper Ampere_meter
Hexagonal wrenchManifold Gauge for
R410A
Hole core drill Thermometer
Vinyl tape Flaring tool set
Ladder, Horizontal Level
R410A tank
Some of the tools used on R22 systems may be unacceptable for use on R410A.
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Installation Location
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Make sure there is no heat or steam around indoor unit. Make sure heat radiation from condenser is not blocked. Place where noise & vibration are minimum. Indoor & Outdoor Unit Space
Requirement :
Case of field defect :
How?
Iocal de instalação/ Selecting Best Location
More than 300
More than 600
More than 300
More than 700
More than 200
More than 100
More than 2300
More than 100
Unit : mm Unit : mm
•Blocked in/outlet air flowLow performance
•Difficult when servicing
•Limited inlet airflow Low cooling
Reduce cooling capacity.
Cause low performance.
Prevent noise problem.
Why?
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Case of field defect :
Installation location / Selecting Best Location
Outdoor unit is installed on top of each other without safely anchoring the unit. Noise/vibration Hard to service Safety issues
When installing the unit at a high place be sure to fix the unit legs (safety precautions) Consider enough space for service when installing outdoor unit.
Tips :
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Case of field defect :
~~~
~~~discharge air
Hot discharge air will enter the unit cause a work overload and starts OLP system(On/Off) Low Performance
Tips :
Always consider enough space when installing outdoor unit. Avoid small installation places as possible.
Installation location / Selecting Best Location
Inlet airflow to condenser is blocked Operating pressure will be high and the unit may repeatedly on-off resulting in low Cooling/Heating
Always follow the given space requirement when selecting install location.
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Cases of field defect :
Installation location / Selecting Best Location
Inlet airflow to evaporator is blocked product low cooling/heating noise might occurs
Tips :
Where inlet/outlet airflow is not blocked. Low cooling performance. Always follow the space requirements to prevent such cases.
Space Requirements for Indoor Unit
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3.5 M.
Installation location / Selecting Best Location
Cases of field defect :
Indoor unit is installed too high. Discharge air can not be fully distributed to user. Low cooling/heating
Tips :
Where inlet/outlet airflow is not blocked. Low cooling performance. Always follow the space requirements to prevent such cases. Consider safety, servicing space when selecting installation place.
Unproper unit installation place. Safety issues
Unproper unit installation place. Difficult during servicing
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Case of field defect :
Installation location / Fixing Installation Plate
Work Process :
Measuring & leveling
Select strong and solid wall. Measure the wall and mark the centerline. Horizontally align the plate centerline using horizontal level
How?Prevent vibration and unit fall off damage.
Easy wiring and piping through the wall.
If unit is slanted, water leakage may occurs.
Why?
• Bad fixing plate Noise!• Product fall off • Horizontally misalign Water leakage
Center hole
Place level on a raised tabUnit Outline
Φ70
Fixing point
Right rear
piping hole
Φ70
Left rear
piping hole
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Installation location / Drilling Hole
Select strong and solid wall. Drill the piping hole with a ø70mm hole core drill. Drill at either right or left with the hole slightly slanted
How?Prevent vibration and unit fall offdamage.
Easy wiring and piping through the wall.
Slanted to outdoor to ensure proper water flow.
Why?
Φ70Right rear
piping hole
Φ70
Left rear
piping hole
Work Process :
• Slightly slanted to outdoor side. Why?Ensure water properly flow in downward direction.
• Reference for dimensions Product Size
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Installation location / Settling Indoor Unit
Hold and press at the corner of the piping. When bending downward or to the left side, do it gently.
How bend the pipe properly?
Use it as a center of rotation to prevent damage.
Prevent damage to pipe which can cause cycle blocking.
Why?
Work Process :
Case of field defect :
• Damage indoor piping during bending. Clogged refrigerant cycle
Hold at the corner of pipingSlowly unfold the pipe
downwardBend to the left side slowly
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Installation location / Settling Indoor Unit
Work Process :
Drill the wall if customer wants the piping through the wall. Use the tubing holder when bending the pipe for connecting. Make sure to be extra careful when bending the pipe.
How?Customer satisfaction.
Sufficient space for easy piping.
Piping may get damagedclogged cycle.
Why?
Detach theChassis bottom
Hang the unit &unlock tubing
holder
Position the pipe for connection
Caution :
• Make sure the unit and install plate are just in the right position and stable. Unit might fall off during working.
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Installation location / Settling Outdoor Unit
Work Process :
Secure the unit with an anti-vibration damper. Secure the unit with nail or wire strong wind or earthquake. If install site is close to seaside, avoid direct exposure.
How?Prevent the vibration to the unit
Product fall offdamage
Prevent from product or part corrosion.
Why?
Nut
Washer
Leg
Damper
Angle
• Corrosion due to sea windpart malfunction
Sea wind
Windbreak
Case of field defect :
• Anchor the unit with a bolt & nut
• Unstable Fall off
• Set up a wind breaker
• No damper Vibration
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Piping work
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Piping Work
Selecting Copper Pipe :
Do not use collapsed,deformed or discolored copper pipe. Never use copper pipes thinner than 0.8mm.
How?Expansion valve may become blocked.
Pipe may get damaged during flaring work .
Why?
Case of field defect :
Precaution :
• Sealed ends of pipes with a cap until connected.
• Avoid piping installation on a rainy day.
• Carry out the work in short time as possible.
• Water or dust does not enter the pipe.
Thickness (mm)
Nominal diameter
Outer diameter
(mm)R410A
1/4 6.35 0.80
3/8 9.52 0.80
1/2 12.70 0.80
5/8 15.88 1.00
• 0.6t Copper Pipe
Condition : Not round shape, Burr exist → resulting in egg-shaped flare work
High possibility of gas leakage
After Flaring
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Piping Work / Pipe Flaring Work
Remove the burrs after cutting work. Never use copper pipes thinner than 0.8mm.
How?Prevent burrs from enteringclogged cycle.
Pipe may damage during flaring work .
Why?
Work Process :
Cutting the pipe Burr removal
Place the pipe
Tighten the clamp Apply the torque Finish & check flare
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Piping Work / Pipe Flaring Work
Case of field defect :
ⓐ(inch)
ⓐ(mm)
R410A / ⓑ (mm)
Clutch type Wing nut type
1/4 6.35 1.1 ~ 1.3 1.5 ~ 2.0
3/8 9.52 1.5 ~ 1.7 1.5 ~ 2.0
1/2 12.70 1.6 ~ 1.8 2.0 ~ 2.5
5/8 15.88 1.6 ~ 1.8 2.0 ~ 2.5
Flaring Position : The use of flare clutch type is preferable.
Defect OK
Checking Flare Work
Compare the flaring work with the figure. If a flaring section is defective, cut it off and do flaring work again.
• Improper flaringGas leakage
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Piping Work / Piping Connection
Make sure that the flare do not have any scar or dust, etc. Make sure to follow the given applied torque.
How?Prevent strange material from entering system.
If applied torque is too strong, flare will get damaged.
Why?
Work Process :
Alignment Indoor Unit Outdoor UnitOutside diameter Torque
mm inch kgf· ㎜
Ø6.35 1/4 1.8~2.5
Ø9.52 3/8 3.4~4.2
Ø12.7 1/2 5.5~6.5
Ø15.88 5/8 6.3~8.2
Ø19.05 3/4 9.9~12.1• Tighten the flare nut by hand.
• Tighten the flare nut with torque wrench untill the wrench clicks.
Case of field defect :
• Applied torque is too strong Flare will get damaged Gas leakage
Tightening Torque :
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Piping Work / Standard Pipe Length
Always follow the pipe length specification. Always remember to add refrigerant if the pipe length is
more than 5m.
How?When it is too short, cycle will be overloaded.
When it is too long, can cause over work at
compressor
Why?
Pipe Installation Length : AFTA Model
Capacity
Pipe Size
Standard Length
(m)
Max. Elevation (A) (m)
Min/Max Length
(B) (m)
Additional
Refrigerant (g/m)
Gas Φ Liquid Φ
mm inch mm inch
2.5kW(9kBtu/h) 9.52 3/8 6.35 1/4 5 7 3 / 15 10
3.5kW(12kBtu/h)
12.7 3/8 6.35 1/4 5 7 3 / 15 10
5.2kW(18kBtu/h)
12.7 1/2 6.35 1/4 5 7 3 / 20 20
7.0kW(24kBtu/h)
15.88 5/8 9.52 3/8 5 7 3 / 20 20
Case of field defect :
• Short Piping Refrigerant inflow noise is directly transmitted to indoor unit. Cycle overload.
(B)
(A)1m
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Piping Work / Pipe Joints Connection
Prior to use, be sure to remove all contaminants. Used to connect the copper pipes. Connections during brazing work.
How?Prevent from entering the system.
Case of pipe diameter is not the same with SVC
valve diameter.
Why?
Joint Type :
Flare Joints Socket Joints
Flare Joints Assembly Socket Joints Assembly
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Welding / Brazing Guide
Nitrogen should be allowed to flow without building up a pressure in the pipeline. Brazing requires sophisticated techniques, it must be performed by qualified person.
How?Prevent from carbon scales clogging.
Safety precautions and to make sure the work is
done properly without any leakage.
Why?
Brazing with Nitrogen :
Connect a nitrogen cylinderto one end of the pipework
Turn on the gas and
regulate the flow
Continue the flow until the joints have
cooled
0.0
5 ~
0.1
2 m
m.
10 mm↑
Caution point :
Pressure :0.1~0.2kgf/ ㎠(1.4~2.8psi)
.
.
Taping
Nitrogen release
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Welding / Brazing Guide
Case of field defect :
Brazing without Nitrogen release :
Problem: Carbon scales clogging filters
Troubles during circulation in a cycle, like clogging EEV, Compressor, moving parts, piping etc
• Pipe frozen Cycle blocked
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Elec. wiring Work
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Electric Wiring Work
Do not use spliced wires or extension cord. Inverter product higher harmonic
Therefore,be sure to install an earth leak detector.
How?Fire or electric shock may occur.
Product or earth leak detector malfunction.
Why?
Terminal Block
Remote Controller Cable
Connection Cable
Cable Retainer
Indoor & Outdoor Unit Wiring : Note :
Use end-terminal forsafety precautions
ConnectorNeutralLive Earth
Outdoor
Indoor
Excessive strip length shock or leakage
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Electric Wiring Work / Wire specification
Always follow the wiring & circuit breaker spec. Do not overload the circuit by adding drain pump or other
electrical equipment.
How?Cause abnormal heat/terminal overheating.
They may cause overheating or electrical shock.
Why?
Note :
Wire & Circuit Breaker Selection :
10±3mm
GND :20mm
10±3mm
GND :20mm
Outdoor Indoor
Circuit Breaker
Earth Leakage
Power Supply
CircuitBreake
r
Grade(kBtu)
9/12 18 24
15 20 30
Cross-section
area
Grade(kBtu)
9/12 18 24
1.0 1.5 2.5
(A)(mm²)
Circuit breaker size selection (Refer to Label Quality for current value) Normal : Running current x 1.75 Inverter : Running current x 2.0
Power Code Connection Cable
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1(L) 2(N) 3(C)
(L) (N) 1(L) 2(N) 3(C)
Brown
Blue
Red Green/yellow
Power Supply
Electric Wiring Work / Wiring Connection
1(L) 2(N) 3(C)
1(L) 2(N) 3(C)
Brown
Blue
RedGreen/yellow
Power Code
Connection cable
Connection cable
How :
Connect the wires between indoor & outdoor
units so that the terminal numbers and colors
are matched. Tighten the terminal screws securely. Do not extend cable connections.
If the wires are not matched, communication
error will occurs CH05,53.
If the connection is loosen, electric shock may
occur.
Extending cable will create noise or electric
short CH05,53
Why?
Indoor Power Supplied Type
Outdoor Power Supplied Type
OUT
IN
OUT
IN
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Electric Wiring Work / Wiring Connection
Case of field defect : Tips : Unproper power supply wiring / absent ground wire Heat ignition of terminal block can cause fire Electric shock
2. Electrical work such as Indoor↔Outdoor connection,earth leakage breaker ground wire must be carried out in accordance with state & local electrical wiring codes.
Ground Terminal
Power Plug
Ground Wire
Main PowerSwitch
Earth LeakageBreaker
GroundWire
Sta
nd
ard
Ele
ctr
icC
od
e
1. Check if there is ground terminal at the plug, to prevent electrical short,perform an additional 3rd grounding at outdoor unit or carry out a separate grounded work.
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Electric Wiring Work / Wiring Connection
Case of field defect : Tips :
Electrical part is not used for only 1~2 years .Most of time, it will have to endure the same periodas air conditioner’s lifetime itself.
Therefore, temporary dan simple wiring work will only cause likely fire or electrical shock.
Extending electric wire;
1st layer of insulation :Make sure to solder the wires to reduce the contact resistance and by using thermal contraction tube.
2nd layer of insulation : Wrap the connection with insulation tape to preventexposure to moisture/surrounding
Unproper extended wiring connection Cable over heat or fire might occur Communication Error CH05 occur(operation stop)
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Electric Wiring Work / Wiring Connection
Case of field defect :
Wrong wiring connection during installation of large numbers of the same model at the same site. Inoperative unit /abnormal operation
Room A Room B Room A Room B
wiring
piping
wiring
piping
Tips :
In case like this, make sure to double check that wiring connection and piping connection are connected to the same model.
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Insulation & Drain Work
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Insulation & Drain Work / Standard
Do the insulation after leak test is done. Bundle the pipe and drain hose together with vinyl tape.
How?
Gas leakage must be checked during test run.
Prevent possible water leakage.
Why?
Work Process :
Drain Hose
Refrigerant Pipe
ConnectingCable
Caution :
Liquid PipeGas PipeCutting Line
Cutting Line
Wrap together refrigerant piping, cable and drain hose with vinyl tape.
Set the tubing line upward prevent possible water leakage.
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Insulation & Drain Work / Case
Case of field defect :
Mold
Tips :
Fully insulate drain hose connection!
Indoor Outdoor
Indoor drain hose
InsulatorExtension
Hose
Fully insulate the connection part between indoor drain hose & extension hose.
If not,leakage may occur as the water will condensate due to temperature changes.
Water leakage at pipe connection due to bad insulation. Mold gathers at the wall.
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Insulation & Drain Work / Water Leak Test
Pour a water to make sure well drainage. Make sure the route of drainage is done properly.
How?Prevent water leakage during operation.
If the drain hose curled, water leakage occurs.
Why?
Checking Drainage :
Pour a glass of water onto evaporator
Check possible leakage
Ensure water flows out the drain exit without leakage
Tips :Downward Slope
The drain hose should point downward for easy drain flow. Fix drain hose to prevent bending or curling Drain hose connection must be easy accessible & serviceable!
OK!
Indoor
Fix
ed
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Case of field defect :
WaterLeakage
Slanted hose
Insulation & Drain Work / Water Leakage Defect
Tips :
Set the drain hose in the downward position drain water can flow smoothly.
Downward Slope
OK!
Indoor
Drain hose is in upward slanted direction drain water can not flow to outdoor unit.
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WaterLeakage
Case of field defect :
Fix drain hose to prevent bending or curling
Tips :
OK!
Fix
ed
Insulation & Drain Work / Water Leakage Defect
Curled drain hose will block water flow water leaks at indoor unit
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Case of field defect :
Insulation & Drain Work / Water Leakage Defect
Tips :
Wrap in the Bottom-Up direction
Wrap the area which accommodates the refrigerant piping, electric cable,drain hose with vinyl tape in Bottom-Up direction!
In case of when pipe connection have to be installed in upward direction Vinyl tape has to be wrapped from bottom to the top! Why?Prevent possible leakage to indoor when raining
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Case of field defect :
Insulation & Drain Work / Water Leakage Defect
For every 1m, fix the drain pipe with clip/tie wrap
Tips :
Water back-flow occurs when the drain line is all the way drooping for over 2m Water leakage at indoor side
1m
∝
Clip
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Vacuum & Test run
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Vacuum / Gas Leak Test
Top of cylinder must be higher than its bottom. Use soap bubble to identify the location of leak.
(flare connection)
How?To avoid nitrogen from entering the system.
Insufficient gas will reduce the cooling capacity.
Why?
Work Process :
Charge nitrogen-gas
Leak test with soap water
Gas release
No leakage
Tightened, repair location of leak
Leakage
Go to next step(Vacuum)
Liquid side
2(3)-wayvalve
3-wayvalve
Close
Close
Low High
Nitrogen
Nitrogen-GasCylinder
Gas side
Open Close
.
.
..
.
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Vacuum / process-1
Air evacuation with vacuum pump is a MUST. Liquid and the gas side SVC valves are kept closed.
How?Air and moisture in system have bad effects as:
• Pressure in the system rises.
• Cooling/heating efficiency drops
Why?
Work Process : Vacuum
Check manifold low side
pressure reach to
76cmHg(30inHg)
Close low side valve of manifold
Turn off vacuum pump
No leakage
Disconnect vacuum
Tightened, repair location of leak
Leakage
Needle gauge does not
move after 5 minutes.
..
15mins
Required time for evacuation when 30 gal/h vacuum pump is used.
Liquid side
2(3)-wayvalve
3-wayvalve
Close
Close
Low High
Gas side
Open Close
.
.
..
.
.
Vacuum Pump
LG ELECTRONICS
Vacuum / Process-2
How? Why?
Work Process :Vacuum
Check Vacuum gauge
pressure reach to 760 mmHg
Close both side valve of
manifold
Turn off the vacuum pump
Leakage
Disconnect vacuum
Tightened, repair location of leak
No leakage
15mins
Required time for evacuation when 30 gal/h vacuum pump is used.
Air evacuation with vacuum pump is a MUST. Liquid and the gas side SVC valves are kept closed.
Air and moisture in system have bad effects as:
• Pressure in the system rises.
• Cooling/heating efficiency drops
Liquid side
2(3)-wayvalve
3-wayvalve
Close
Close
Low High
Gas side
Open Open
.
.
..
.
. .
Vacuum gaugeVacuum Pump
LG ELECTRONICS
Vacuum / Finishing Vacuum Work
Now, the gas is ready to be released to the system. Be sure to mount all the caps onto 2way & 3way SVC valve
How?Gas leakage must be checked during test run.
Prevent small possible leakage in future use.
Why?
Work Process :
Disconnect the manifold from the
vacuum pump and from the service port of 3way valve
Position both of the SVC valves to “Open”
using a hexagonal wrench(4mm)
Mount valve caps onto the 2way valve and the
3way valve
Liquid side
2(3)-wayvalve
3-wayvalve
Open
Open
Low High
Gas side
Close Close
.
.
..
.
. .
Vacuum Pump
.
Gas Release
LG ELECTRONICS
Vacuum / Additional Refrigerant
Charge in standing upright position. Before recharging, check whether the cylinder has a
siphon or not.
How?Charging 410A must be in liquid state for right
composition effect such as low cooling.
Why?
Work Process :
Open low side valve of
manifold slowly
Balance zero
setting
Connect gas cylinder to manifold
Open Gas side SVC valve
Close low side valve of manifold
Refer manual Installation for gas weight(g) / pipe length(m)
Balance
Liquid side
2(3)-wayvalve
3-wayvalve
Close
Open
Low High
Gas side
Open Close
.
.
..
.
. .
Upright Position
Until target weight is reached
LG ELECTRONICS
Test Run
Press “On/Off” button and hold for 3~6 secs. Check operating pressure,current, voltage etc.
How?To enter a mode that is specially designed for Test Run.
Ensure the product work properly or not.
Why?
Test Run Operating Logic :
ON/OFFButton
In this mode, regardless of the outside temperature, the unit will operate for 18±1 minute in below conditions:
-Cooling Mode -Indoor Fan High RPM
-Thermal On/Comp On -Vertical Auto Swing
Airflow
- Comp. fixed frequency
1. Measure the temperature of the intake & discharge air.
Ensure the difference between the intake & discharge temp. is more than 8℃ (Cooling) & 14℃(Heating)
Check Items :
LG ELECTRONICS
Test Run
Check Items :
Refri.Outside ambient TEMP
Pressure of the gas
Side Service valve.
R410A 35 (95 )℃ ℉8.5~11.2 ㎏ / ㎠ G
(120~160 P.S.I.G)
2. Measure the pressure of the gas side service valve.
If the pressure is drop or significantly higher than specification:
Pressure is low:Gas leakage / insufficient
Pressure is high:System is overloaded Possibility of overchargeClosed SVC valve - Recheck
Recheck gas leak
LG ELECTRONICS
Test Run
Check Items :
3. Measure the voltage & operating current.(Refer to Label Quality for specification)
Check Items Symptom Check
Indoor & Outdoor units are installed on solid bases.
Fall, vibration, noise
System is properly ground to earth
Electrical leakage
Wiring connection Inoperative or error code 05
Drain line is properly installed Water leakage
Power supply voltage/current complied with the rated value
Other Check Items :