Drainage Test - Kaisai KOU-12HDN1 Service Manual

Water Drainage
For Four-way cassette
4.4 Convergent drainage
1). The number of indoor units should be as small as possible to prevent the traverse main pipe overlong.
2). Indoor unit with drain pump and indoor unit without drain pump should be in different drainage system.
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)
Hard PVC
Hard PVC
Hard PVC
Hard PVC
Hard PVC

4.5 Drainage test

1). Drainage without drain pump
After finishing drainpipe installation, pour some water into the water receiver plate to check if the water flows smoothly.
2). Drainage with drain pump
① Poke the W ater Level Switch , remove the cover, use water pipe to pour 2000ml water into the water receipt plate through the water inlet.
② Turn on t h e power to Cooling operation. Check the pump's operation and switch on the Water Level Switch. Check the pump's sound
and look into the transparent hard pipe in the outlet at the same time to check if the water can discharge normally.
130
Allowed volume(lean 1/50) (l/ hr)
∽ ≤ 14
14＜∽ ≤ 88
88＜∽ ≤ 334
175＜∽ ≤ 334
334＜∽
MLCAC-UTSM-2010-10
I.D. (mm)
￠25
￠30
￠40
￠50
￠80
Thick
3.0
3.5
4.0
4.5
6.0
Installation