Chigo CCB-12HR1 Technical Manual page 150

R410A50Hz Universal Outdoor Series Technical Manual
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)
Allowed volume(lean 1/50) (l/ hr)
Hard PVC
集中排水管
Hard PVC
Hard PVC
Hard PVC
Hard PVC
147
∽ ≤14
14＜∽ ≤88
88＜∽ ≤334
175＜∽ ≤334
334＜∽
I.D. (mm)
￠25
￠30
￠40
￠50
￠80
GD Chigo Heating & Ventilation Equipment Co., Ltd.
Installation
Thick
3.0
3.5
4.0
4.5
6.0