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Technical Training
Service Section
Technical Training
Good Installation Practices
Technical Training
Good Air Conditioning
Installation Practices
Good Installation Practices
Contents
• Location of installation
• Piping
• Cleanliness
Technical Training
• Electrical
• Refrigerant Circuit
Good Installation Practices
Technical Training
Location of Installation
Good Installation Practices
Location of Installation
Technical Training
Indoor unit
• Ceiling too high
Good Installation Practices
Location of Installation
Technical Training
Indoor unit
• Unit installed in an enclosed area
Good Installation Practices
Location of Installation
Technical Training
Indoor unit
• Dirty or chemically hazardous environment
Good Installation Practices
Location of Installation
Technical Training
Indoor unit
• Avoid high electrical interference environment ( infra
red bar code scanning machine, lighting with
electronic ballast)
Good Installation Practices
Location of Installation
Technical Training
Indoor unit
• No service opening
Good Installation Practices
Location of Installation
Technical Training
Indoor unit
• Duct work too short
Good Installation Practices
Location of Installation
Outdoor unit
• Select a suitable installation site
Technical Training
A place where …...
…… Easy for service
Good Installation Practices
Location of Installation
Outdoor unit
• Select a suitable installation site
Technical Training
A place where …...
…… Comply to installation clearance
Good Installation Practices
Location of Installation
Outdoor unit
• Select a suitable installation site
Technical Training
A place where …...
…… Do not block the air discharge
Good Installation Practices
Location of Installation
Outdoor unit
• Select a suitable installation site
Technical Training
A place where …...
…… The return air is not short cycle
Good Installation Practices
Location of Installation
Outdoor unit
• Select a suitable installation site
Technical Training
A place where …...
…… To avoid strong wind
Good Installation Practices
Location of Installation
Technical Training
Drainage
• A proper drainage system is crucial
Good Installation Practices
Location of Installation
Technical Training
Drainage
• A proper drainage system must be sloped
Good Installation Practices
Location of Installation
Technical Training
Drainage
• Beware of where it ends
Good Installation Practices
Location of Installation
Technical Training
Drainage
• Proper length is crucial
Good Installation Practices
Technical Training
Piping
Good Installation Practices
Piping
Technical Training
• Keep the piping as short as possible
Good Installation Practices
Piping
• Provide oil traps if height of installation exceed 10m
Technical Training
Condenser
Condenser
10m
5m
Evaporator
Good Installation Practices
Evaporator
Piping
Technical Training
• Insulate the pipe and insulate it separately
Good Installation Practices
Piping
Technical Training
• Bend the pipe using pipe bender instead of hands.
Good Installation Practices
Piping
• Do not size up or size down the pipe (especially for
heatpump model)
> Pipe size up - refrigerant velocity down
Technical Training
> Pipe size up - more refrigerant needed - refrigerant
floodback
> Pipe size up - dilution of oil
Good Installation Practices
Technical Training
Cleanliness
Good Installation Practices
Cleanliness
Technical Training
• Do not expose pipes or components to
environment over an prolong period.
Good Installation Practices
Cleanliness
Technical Training
• Keep moisture out of pipes or components
Good Installation Practices
Cleanliness
Technical Training
• When laying pipes through walls, end of
pipes must be properly sealed
Good Installation Practices
Cleanliness
Technical Training
• When cutting a copper pipe, use copper
cutter instead of saw.
Good Installation Practices
Cleanliness
Technical Training
• Always vacuum before charge in refrigerant
Good Installation Practices
Cleanliness
Technical Training
• Always braze with present of nitrogen
Good Installation Practices
Technical Training
Electrical
Good Installation Practices
Electrical
Technical Training
• Remote control wiring should be separated from
power cable
Good Installation Practices
Electrical
Technical Training
• Screw must be tight at terminals
Good Installation Practices
Electrical
• Examine the power source
Technical Training
• Determine the maximum load the power source can
handle
Good Installation Practices
Technical Training
Refrigerant Circuit
Good Installation Practices
Refrigerant Circuit
• Proper leak check
• Properly charge the system
• For no pre-charge system which is using scroll
compressor, must contain 80% charge before start
Technical Training
• For system that using TXV, make sure the TXV is
properly installed
Good Installation Practices
Technical Training
Thank you
Good Installation Practices