service section technical training. good air conditioning installation practices

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Good Installation PracticesGood Installation Practices

Service SectionService Section

Technical Training Technical Training

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Good Air Conditioning Good Air Conditioning Installation PracticesInstallation Practices

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Contents

• Location of installationLocation of installation

• PipingPiping

• CleanlinessCleanliness

• ElectricalElectrical

• Refrigerant CircuitRefrigerant Circuit

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Location of InstallationLocation of Installation

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Location of Installation

Indoor unitIndoor unit

• Ceiling too highCeiling too high

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• Unit installed in an enclosed areaUnit installed in an enclosed area

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• Dirty or chemically hazardous environmentDirty or chemically hazardous environment

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• Avoid high electrical interference environment ( infra Avoid high electrical interference environment ( infra red bar code scanning machine, lighting with red bar code scanning machine, lighting with electronic ballast)electronic ballast)

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• No service openingNo service opening

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• Duct work too shortDuct work too short

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Outdoor unitOutdoor unit

• Select a suitable installation siteSelect a suitable installation site

A place where …...A place where …...

…… …… Easy for serviceEasy for service

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…… …… Comply to installation clearanceComply to installation clearance

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…… …… Do not block the air dischargeDo not block the air discharge

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…… …… The return air is not short cycleThe return air is not short cycle

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…… …… To avoid strong windTo avoid strong wind

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DrainageDrainage

• A proper drainage system is crucialA proper drainage system is crucial

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DrainageDrainage

• A proper drainage system must be slopedA proper drainage system must be sloped

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DrainageDrainage

• Beware of where it endsBeware of where it ends

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DrainageDrainage

• Proper length is crucialProper length is crucial

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PipingPiping

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Piping

• Keep the piping as short as possibleKeep the piping as short as possible

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Piping

• Provide oil traps if height of installation exceed 10mProvide oil traps if height of installation exceed 10m

10m

5m

Condenser

Evaporator

Condenser

Evaporator

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Piping

• Insulate the pipe and insulate it separatelyInsulate the pipe and insulate it separately

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Piping

• Bend the pipe using pipe bender instead of hands.Bend the pipe using pipe bender instead of hands.

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Piping

• Do not size up or size down the pipe (especially for Do not size up or size down the pipe (especially for heatpump model)heatpump model)

> Pipe size up - refrigerant velocity downPipe size up - refrigerant velocity down

> Pipe size up - more refrigerant needed - refrigerant Pipe size up - more refrigerant needed - refrigerant floodbackfloodback

> Pipe size up - dilution of oilPipe size up - dilution of oil

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CleanlinessCleanliness

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Cleanliness

• Do not expose pipes or components to Do not expose pipes or components to environment over an prolong period.environment over an prolong period.

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Cleanliness

• Keep moisture out of pipes or components Keep moisture out of pipes or components

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Cleanliness

• When laying pipes through walls, end of When laying pipes through walls, end of pipes must be properly sealedpipes must be properly sealed

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Cleanliness

• When cutting a copper pipe, use copper When cutting a copper pipe, use copper cutter instead of saw.cutter instead of saw.

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Cleanliness

• Always vacuum before charge in refrigerantAlways vacuum before charge in refrigerant

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Cleanliness

• Always braze with present of nitrogenAlways braze with present of nitrogen

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ElectricalElectrical

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Electrical

• Remote control wiring should be separated from Remote control wiring should be separated from power cablepower cable

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Electrical

• Screw must be tight at terminalsScrew must be tight at terminals

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Electrical

• Examine the power sourceExamine the power source

• Determine the maximum load the power source can Determine the maximum load the power source can handlehandle

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Refrigerant CircuitRefrigerant Circuit

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Refrigerant Circuit

• Proper leak checkProper leak check

• Properly charge the systemProperly charge the system

• For no pre-charge system which is using scroll For no pre-charge system which is using scroll compressor, must contain 80% charge before startcompressor, must contain 80% charge before start

• For system that using TXV, make sure the TXV is For system that using TXV, make sure the TXV is properly installedproperly installed

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Thank youThank you

service section technical training. good air conditioning installation practices

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