R410A50Hz Universal Outdoor Series Technical Manual
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GUANGDONG CHIGO HEATING & VENTILATION EQUIPMENT CO., LTD.
4.3 Upwards drainage (drain pump)
For Four-way cassette (compact)
For Four-way cassette
4.4 Convergent drainage
4.4.1. The number of indoor units should be as small as possible to prevent the traverse main pipe overlong.
4.4.2. Indoor unit with drain pump and indoor unit without drain pump should be in different drainage system.
4.4.3. Selecting the diameter
Number of connecting indoor units → Calculate drainage volume → Select the diameter
Calculate allowed volume =Total cooling capacity of indoor units(HP)×2 (l/ hr)
集中排水管
Allowed volume(lean 1/50) (l/ hr)
I.D. (mm)
Thick
Hard PVC
∽
≤14
￠
25
3.0
Hard PVC
14
＜∽
≤88
￠
30
3.5
Hard PVC
88
＜∽
≤334
￠
40
4.0
Hard PVC
175
＜∽
≤334
￠
50
4.5
Hard PVC
334
＜∽
￠
80
6.0
