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Condensing Unit
Service Manual
(2). Testing of Drainage System
After the electrical installation is completed, carry out the testing of the drainage system.
During the test, check if the water correctly flows through the pipelines. Carefully observe the joints to
ensure that there is no leakage. If the unit is to be installed in a new house, carry out testing before
decorating the ceiling.
(3). Matters of Attention
The drain pipe outlet direction can be chosen from either the right rear or right.
The diameter of the drain pipe should be equal to or greater than the diameter of the connecting pipe.
(Vinyl tube; pipe size: 20mm; outer dimension: 26mm)
Keep the drain pipe short and incline downwards at a gradient of at least 1/100 to prevent air pockets.
(Refer to Figure 1-2-10) .
When drain hose is connected
No folding of drain hose inside the indoor unit. (Refer to Figure 1-2-11)
Confirm that smooth drainage is achieved after the piping work. Pour 600 cc of water into the drain pan
from the air outlet for confirming drainage. (Refer to Figure 1-2-12).
3 REFRIGERATION PIPING WORK
3.1 Refrigeration Piping Work Procedures
(1). Connecting pipelines
Connection pipes must be in accordance with the following requirements: the basic principle --- keeping
dry, clean and no leakage inside.
22
Incline the drain hose
Not to be lifted
Not foldings
Figure 1-2-10
Wartering can
Figure 1-2-11
Not to be soaking in water
Air outlet
Figure 1-2-12
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