Gravity condensate size on 10kw cassette.....

[chillbill4747]

Hi All,

Am looking to clarify if it's ok to fit 1' 1/4" condensate connected to the standard drain attachment that comes with a Daikin cassette?

The drain will initially be fitted vertical as usual as aware that the cassettes have an internal pump fitted.

I usually abandon the attachment and fit a rubber adaptor (Pump House or Sauermann) that downsizes to 3/4" overflow without a problem but never gone straight to 1' 1/4" off the cassette. Have looked in the manual for recommended condensate pipe size but could not find anything.

Any advice or previous experiences from this would be much appreciated

Thanks

[monkey spanners]

Can't see a problem with running it in 1 1/4" i think for fujitsu that is the recommended size anyway, though often it is reduced for cheapness and easyness of installation.

[hyperion]

The only possible problem is when the internal pump stops, the amount of water that back-flows into the cassette from the initial vertical section might be sufficient to cause an overflow of the drip tray if you use 1-1/4", however this is much less likely if the vertical is 3/4".

[install monkey]

on 3/4 overflow a daikin lift pump will do 760mm- calculate the volume of 3/4 overflow and compare it to 1 1/4 and that will give you your max lift - best case is to use the flexi to send the drain up and stick a 90 bend on itand ensure you get the fall of 1cm per mtr