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Ceiling Concealed Drain Piping Work
• The drain pipe must be installed as shown in the diagram (see diagram above) to avoid damage caused by leaks and
condensation.
• For the best result, keep the piping as short as possible. Slant the piping at an angle to improve the ow.
• Ensure the drain pipe is securely insulated.
• It is necessary to provide a drain trap in the drain outlet to relieve pressure that exists within the unit compared to the outside
atmospheric pressure when the unit is operating. The drain trap is to avoid possibility of splashes or an odor.
• Keep pipes as straight as possible for easy cleaning and to prevent the accumulation of dirt and debris.
• Conduct a water drainage test after the installation is completed. Make sure that the drainage ow is smooth.
• In humid environments, use an extra drain pan to cover the entire area of the indoor unit.
1-9
Unit : mm
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