innovair TC18C2DWB1 Installation Manual page 8

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 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
§
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
and look into the transparent hard pipe in the outlet at the same time to check if the water can discharge normally.
26
Calculate drainage volume
Allowed volume(lean 1/50) (l/ hr)
&
14
&
14 88
(
&
88 334
(
&
175 334
(
( &
334
Select the diameter
I.D. (mm)
'
'
40
'
'
'
Thick
3.0
25
3.5
30
4.0
4.5
50
6.0
80
h. Check the pump's sound
Installation