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DC Inverter Multi
VRF Service Manual
6.2.15 The long drainage pipe may be xed by using hanger bolts, thus to ensure a gradient of 1/100 (PVC cannot be bent).
The spacing between the supports of horizontal pipe is 0.8-1.0m. Twisting will be caused and thus air bag will be
formed if the spacing is too high. Once the air bag is formed, the pump can only compress the air bag no matter how
forcible it pushes, but there is no owing water, thus resulting in abnormal water level. This will cause ooding of the
ceiling.
6.2.16 If the air ow 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.
Indoor unit.
H
H/2
Install water trap as shown below;
Install one water trap for each unit.
Installation of water trap shall consider easy cleaning in the future.
Joint
Joint
Indoor
unit.
Indoor
unit.
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