Haier AB072MRERA Service Manual page 206

Installation of drain hose
Connection of indoor drain hose
1. Please use accessory drain hose to connect indoor unit's water outlet and PVC pipe and use snap rings to
tighten them, as shown in the following figure:
2. Please use rigid PVC adhesive for connection of other pipes and ensure there is no leakage.
3. Drain hose must be wrapped up with insulation sleeve and tightened with strap to prevent air leaked in producing
condensate.
4. To prevent water flowing back into air conditioner when it stops running, drain hose shall decline to the drainage
side with a declination of above 1/100. Drain hose expansion or water accumulation shall be prevented, or else it
will cause abnormal noise.
5. When connecting the drain hose, do not pull on it so as to avoid the pipe connections getting loose or off. Drain
hose should not be pulled out laterally for more than 20cm and should be supported every 0.8-1.0m to avoid
bending.
6. The end of drain hose should be more than 50mm away from the ground or the bottom of drainage tank. It should
not be put in water. To directly drain condensate into drainage ditch, the drain hose must be U-shaped to avoid stink
spreading through the hose into room.
Drainage test
Before test, firstly ensure the drain hose is unblocked and all
connections are tightly sealed and then perform the drainage test
as follows:
1. Inject about 500ml water into the water pan through water
injection hole;
2. Switch on the power and make air conditioner operate in
refrigerating mode. Check whether the water outlet drains water
normally and there are no leakages on connections. After the
drainage test is complete, replace the water injection hole plug. For
the position of water injection hole, see the figure on the right:
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