Service Section Technical Training

Good Air Conditioning Installation Practices

Contents Location of installationLocation of installation PipingPiping CleanlinessCleanliness ElectricalElectrical Refrigerant CircuitRefrigerant Circuit

Storage and Transportation

Condensing units must be stored and transport in an upright positionCondensing units must be stored and transport in an upright position

Storage and Transportation The air conditioner should not be over-stackThe air conditioner should not be over-stack Prevent drop of unitPrevent drop of unit

Location of Installation

Indoor unit Ceiling too highCeiling too high

Location of Installation Indoor unit Unit installed in an enclosed areaUnit installed in an enclosed area

Location of Installation Indoor unit Dirty or chemically hazardous environmentDirty or chemically hazardous environment

Location of Installation Indoor unit Avoid high electrical interference environment ( infra red bar code scanning machine, lighting with electronic ballast)Avoid high electrical interference environment ( infra red bar code scanning machine, lighting with electronic ballast)

Location of Installation Indoor unit No service openingNo service opening

Location of Installation Indoor unit Duct work too shortDuct work too short

Location of Installation Outdoor unit Select a suitable installation siteSelect a suitable installation site A place where …... …… Easy for service

Location of Installation Outdoor unit Select a suitable installation siteSelect a suitable installation site A place where …... …… Comply to installation clearance

Location of Installation Outdoor unit Select a suitable installation siteSelect a suitable installation site A place where …... …… Do not block the air discharge

Location of Installation Outdoor unit Select a suitable installation siteSelect a suitable installation site A place where …... …… The return air is not short cycle

Location of Installation Outdoor unit Select a suitable installation siteSelect a suitable installation site A place where …... …… To avoid strong wind

Location of InstallationDrainage A proper drainage system is crucialA proper drainage system is crucial

Location of InstallationDrainage A proper drainage system must be slopedA proper drainage system must be sloped

Location of InstallationDrainage Beware of where it endsBeware of where it ends

Location of InstallationDrainage Proper length is crucialProper length is crucial

Piping

Piping Keep the piping as short as possibleKeep the piping as short as possible

Piping Provide oil traps if height of installation exceed 10mProvide oil traps if height of installation exceed 10m 10m 5m Condenser Evaporator Condenser Evaporator

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

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

Piping Do not size up or size down the pipe (especially for heatpump model)Do not size up or size down the pipe (especially for heatpump model) >Pipe size up - refrigerant velocity down >Pipe size up - more refrigerant needed - refrigerant floodback >Pipe size up - dilution of oil

Cleanliness

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

Cleanliness Keep moisture out of pipes or componentsKeep moisture out of pipes or components

Cleanliness When laying pipes through walls, end of pipes must be properly sealedWhen laying pipes through walls, end of pipes must be properly sealed

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

Cleanliness Always vacuum before charge in refrigerantAlways vacuum before charge in refrigerant

Cleanliness Always braze with present of nitrogenAlways braze with present of nitrogen

Electrical

Electrical Remote control wiring should be separated from power cableRemote control wiring should be separated from power cable

Electrical Screw must be tight at terminalsScrew must be tight at terminals

Electrical Examine the power sourceExamine the power source Determine the maximum load the power source can handleDetermine the maximum load the power source can handle

Refrigerant Circuit

Proper leak checkProper leak check Properly charge the systemProperly charge the system For no pre-charge system which is using scroll compressor, must contain 80% charge before startFor no pre-charge system which is using scroll compressor, must contain 80% charge before start For system that using TXV, make sure the TXV is properly installedFor system that using TXV, make sure the TXV is properly installed

Thank you