View Full Version : AHU condensation problem

10-08-2011, 05:58 AM

We ve just had a A.H.U. installation with a downflow configuration with raised floor.

After installing the unit, and during commissioning, when turn it on we have noticed condensation driping from the Drain Pan.
I may have to mention here that the raised floor has not yet being installed. Condensation maybe relevant to this? (i.e. air turbulance?)

Any advice welcome.


10-08-2011, 10:39 AM
hi zenen,
is the drip tray piped up? is there a pee trap on the vertical pipework? is the air volume making the condence water splash over the drip tray? is it condenceation on the drip tray , or is it leaking ?
happy hunting = sedgy

10-08-2011, 01:37 PM
Assuming unit is level, a p-trap must be correctly installed to ensure water flow out of condensate pan.

01-09-2011, 10:27 AM
check the air velocity leaving the coil,if it exceeds 1.8 m/s in ANY place condensate will carry over.Fan speed & proximity to coil can influence this; good luck!

01-09-2011, 12:21 PM
Forgot the F'n Flare NUT. Welcome to Refrigeration Engineer. Think we can shorten your name to... ah., FFN, ;)' how's that? So, which part of Australia are do you live?.. Mike.

01-09-2011, 12:33 PM
air volume making the condence water splash over the drip tray, i believe was the problem. After the raised floor installed we have no condensation problems.

thanks everyone

04-09-2011, 01:20 PM
Beers 2 you Mike,currently in Albury/Wodonga but formerly from Cairns (1987-2007) Still got maroon blood!

install monkey
04-09-2011, 01:33 PM
is that "for goth flarenut" or abbreviated?
just out of intrest what is the sucess rate of your flares? i did 6 this week first time and im wondering if i am a flare jedi? have u ever forgot the flare nut or put the flare the wrong way ?haha

05-09-2011, 11:15 AM
what flares have to do with condensation, I dont understand...

05-09-2011, 12:48 PM
abbreviated,dear monkey!and yes,after 30 years I still occasionally forget the freaking flare nut!!!
as to your previous assertion,a true flare jedi would never boast of his prowess!

07-09-2011, 06:27 AM
again.... what flares have to do with condensation mate?

07-09-2011, 01:20 PM
zenen,I apologise for hijacking your post.I'm new to this forum(and forums as a whole) flares have nothing to do with condensation in this case,and i should continuue in the chat area,glad to hear you resolved your issue.

750 Valve
17-09-2011, 03:30 AM
again.... what flares have to do with condensation mate?

Condensation occurs on flare nuts too!!!

Are you prejudice against flare nuts??? They need love too! And sometimes some condensation.