Water Blow-Off During Humidification 3

[BMitch]

We are getting excessive water build up under one of our DATA AIRE CRAC Units (model# DAAD-2034)during humidification (the humidifier in the CRAC Unit is a Nortec MES-U series). We have changed out the cylinder which helped a little; have also checked the drain line, which is clear; and the Capacity Pot is turned down as low as it can go (25%). I believe the issue is more of a design flaw, the steam is distributed (or dumped) to just one of the two blower fans causing water to build up in our sub-floor. Any ideas or suggestions are appreciated.

BMitch

 

[Compositepro]

BMitch, what I meant was that steam inside of copper tubes placed in a high velocity air flow is a common technique used to condense steam and turn it into water. It is called a condenser. This is not what you want to happen. The purpose of the manifold is to convey steam and inject it into the air through the nozzles. Steam injected into high velocity air produces very tiny (if any) droplets of water (fog) that evaporate very rapidly. Water coming out of the nozzles comes out in huge droplets that will not evaporate before hitting the duct wall. Not only that but you are injecting in the volute of a blower which acts as a cyclone separator so water is immediately flung to the wall.

You should also make sure that steam injection stops immediately when the blowers stops. Preferably before the blower is stopped, so that the ducts stay dry.

 

[BMitch]

Compositepro, I see what you are saying about blower immediately flinging water to the wall; I was thinking about maybe splitting the steam line adding another manifold in the other blower but, that would probably just create two different water puddles. As far as the steam injection stopping when the blower stops, not an issue blowers run 24/7.

I have called Data Aire again and asked to speak with a different person; hopefully this one will be more helpful and continue to return my calls.

BMitch

 

[sridhar1312]

The velocity across the humidifier must be more than 500 feet per minute or the spray density may be high. If the spray is misty and fine like steam then carry over should not happen.
If the velocity across the filter is measured when the steam humidifier is in operation it will give clear clue where the issue lies.

Immediate solution may be to add a w eliminator so the moisture /water droplets does not carried .

 

[BMitch]

Update:

Though we had determined that the drain line on the steam distribution manifold was not clogged we decided to cut the copper line to see for our self. We found a green slime that was restricting the flow of water. We are not sure where this slime came from; we do have very hard water here but the CRAC unit is only 1 and 1/2 to 2 years old. Since removing the slime (1 week ago) we have not had any water build up under the CRAC unit.

BMitch