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5.
Water Discharge Piping Installation
5.1 Water Discharge Piping Installation for Indoor Unit
1. Use PVC pipes for the water discharge pipes. Based on the installation
scenario, users can purchase the appropriate piping length from a sales
agent, local after-sales service center, or local market. The piping length
should be at least the same length as the body of the unit.
2. Insert the water discharge pipe into the end of the water suction connecting
pipe of the unit body, and use the ring clamp (accessory) to clamp the water
discharge pipes with the insulation casing for the water outlet piping securely.
3. Use the insulation casing for water discharge piping (accessory) to bundle
the water suction and discharge pipes of the indoor unit (especially the indoor
portion), and use the tie for the water discharge piping (accessory) to bind
them firmly to make sure air does not enter and condense. See Figure 5.1
Ring
Water
IDU
clamp
discharge hose
Drainage
outlet
Figure 5.1
4. In order to prevent the back-flow of water into the interior of the air conditioner
when the operation stops, the water discharge pipe should slope downwards
towards the outside (drainage side) at a slope of more than 1/100. Make sure
that the water discharge pipe does not swell or store water; otherwise, it will
cause strange noises. See Figure 5.2.
5. When connecting the water discharge piping, do not use force to pull the
pipes to prevent the water suction pipe connections from coming loose. At
the same time, set a supporting point at every 0.8~1 m to prevent the water
discharge pipes from bending. See Figure 5.2.
a
b
Figure 5.2
6. When connecting to a long water discharge pipe, the connections must be
covered with the insulation casing to prevent the long pipe from coming
loose.
7. Install the water discharge pipes as shown in Figure 5.3 or Figure 5.4. The
water discharge piping outlet should not be higher than the water discharge
height, ensuring a downward slope of more than 1/100.
Method to discharge water with the drainage pump
Method to connect the water discharge piping for a single unit
Water outlet pipe fittings
Water discharge pipes from multiple units are connected to the main
water discharge pipe to be discharged through the sewage pipe.
Method to discharge water without the drainage pump
Method to connect the water
discharge piping for a single unit
PVC water discharge
pipe (Ф 25)
Hard PVC adhesive
0.8～1.0m
Slope of 1/100 or more
>1.0m
Slope
Slope of 1/100 or more
Main water outlet pipe
Figure 5.3
As large as possible (about 10 cm)
Slope > 1/100
Slope > 1/100
Method for centralised water
discharge piping connection
Figure 5.4
8. The end of the water discharge pipe must be more than 50 mm above the
ground or from the base of the water discharge slot. Besides, do not put it in
the water.
Cauti
on
•
Make sure all the connections in the piping system are properly sealed to
prevent water leakages.
5.2 Water Discharge Test
1. Before the test, make sure that the water discharge pipeline is smooth, and
check that each connection is sealed properly. Conduct the water discharge
test in the new room before the ceiling is paved.
2. Connect the power supply, and set the air conditioner to operate in the cool
mode. Check the running sound of the drainage pump, as well as whether
water is properly drained from the water discharge outlet.
3. Stop the air conditioner. Wait for three minutes, and then check if there is
anything unusual. If the water discharge piping layout is not correct, the
excessive water flow will cause the water level error and "EE" error code will
be displayed on the display panel. There may even be water overflowing from
the drain pan.
4. Open the test water cap, continue to add water (Figure 5.5 shows the water
inlet) until the alarm for excessive water levels is triggered. Check if the
drainage pump drains water immediately. After three minutes, if the water
level does not fall below the warning level, the unit will shut down. At this
time, you need to turn off the power supply, and drain away the accumulated
water before you can turn on the unit normally.
5. Turn off the power supply, remove the water manually using the drainage
plug, and put the test cap back to the original place.
Caution
• The drainage plug at the bottom of the unit body is used to discharge
accumulated water from the drain pan when the air conditioner
malfunctions. When the air conditioner is operating normally, make sure
the drainage plug is properly plugged to prevent water from leaking.
Water discharge trench
Test water cap
7
Water
injection pipe
Figure 5.5
Water discharge pipe
Figure 5.6
V.2
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