Water Drainage
26
Installation
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)
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
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
Poke the Water Level Switch, remove the cover, use water pipe to pour 2000ml water into the water receipt plate through the water
inlet.
Turn on the power to Cooling operation. Check the pump’s operation and switch on the Water Level Switc
h. 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.
