MULTI VRF-Ⅱ INDOOR UNIT SERVICE MANUAL EUROPEAN/LATIN AMETICA (R410A)
107
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If the air flow of indoor unit is high, this might cause negative pressure and result in return suction of
outdoor air. Therefore, U-type water trap shall be designed on the drainage side of each indoor unit.
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Install water trap as shown below
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Install one water trap for each unit
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Installation of water trap shall consider easy cleaning in the future.
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Connection of drainage branch pipe to the standpipe or horizontal pipe of drainage main pipe
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The horizontal pipe cannot be connected to the vertical pipe at a same height. It can be connected in a
manner as shown below:
N01:3-way connection of drainage pipe joint
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