Omega OTEC IECS-D Series, Technical Manual

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• When concentrating and installing the water discharge piping, arrange the pipes according to the diagram
provided in Figure 3.
• 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. In addition, do not submerge it in water. To discharge the condensed water directly into a
ditch, the water discharge pipe must bend upwards to form a U-shaped water plug to stop the odour from
entering the room via the water discharge pipe.
Caution:
Make sure all the connections in the piping system are properly sealed to prevent water leakages.
Connection of drainage pipe (see Figures 2 and 3):
Figure 2 Method to connect the water discharge piping for a single unit
Figure 3 Method for centralised water discharge piping connection
6.2 Water discharge test
1.Before the test, make sure that the water discharge pipeline is smooth, and check that each connection is
sealed properly.
2.Conduct the water discharge test in the new room before the ceiling is paved.
• Use the water injection pipe to fill the drain pan with about 500ml of water through the drain pan outlet (high
side) or through the air outlet (if the air outlet duct is not installed).
• Connect the power supply, and set the air conditioner to operate in the cool mode. Check that the water
discharge piping outlet discharges water properly (based on the length of the pipe, the discharge may occur at
a delay of 1 minute or so), and check for water leakages at each joint. The water injection pipe is marked as
shown in the following figure.
6.3 Installation of water discharge piping of ODU
Put the seal ring on the water outlet joint, insert it from the bottom of the ODU into the hole of the chassis and
rotate it 90 degrees to make it fit firmly. Connect the water discharge piping (to be purchased by the customer)
Indoor Unit
Ring
clamp
Water
discharge hose
PVC water discharge
pipe (Φ25)
Drainage outlet Hard PVC adhesive
Figure 1
0.8~1.0m
Slope > 1/100
As large as possible (about 10 cm)
Slope > 1/100
Water injection
pipe