Zephyr Pool Dehumidifiers

[ru-bas]

I have 4 Zephyr units which provide dehumidification for the Pool area in the Arena on campus. The problem that I am having is overheating the pool during summer operations. I can't get an answer from the HVAC department except to turn the units off or raise the dehumidification setpoint to keep the units from dehumidifying which is overheating the pool. Can someone please explain how I can keep from overheating the pool and still dehumidify?

Thanks!

[DeltaT]

First, check all the room sensors, humidity sensors and pool water sensor to see that they are set correctly AND that they are calibrated.

The energy that is being used to dehumidify the pool room area is also use to heat the pool water. When one or more of the humidity sensors is set too low or is out of calibration dehumidification will continue to take place and the energy used to dehumidify will end up back in the pool water causing overheating of the pool water which causes too much water vapor in the air which causes the system to attempt to dehumidify which causes.......you see where I am going with this.

All your sensors must be set correctly and working properly. The system must be checked to make sure the sensors are OK and set correctly and that a simple thing like a control relay or compressor contactor is not stuck closed.

[Murphcoair]

What model units do you have ? if they are the DH series, do they have the optional remote air cooled condensers installed ? if not over heating will allways be a problem.

[ru-bas]

We changed the humidity sensors and this has helped some.
We also found compressor problems and repairs are underway.

Thanks for the suggestions and comments.

They do have the remote air cooled condensers. We also found problems with one of these circuits. HVAC mechanics missed that one.

[DeltaT]

Thanks for the follow-up. Be sure to tell your HVAC guys that if they need any input on what to look for in these systems they can get all the help they need here.

Best of luck.

[dryguy]

In the day, I worked at Dumont and personally know the former Service Manager for that line. Clyde Moody has set up a business to provide parts and support for the Zephyr Dehumidifiers. Clyde's business is called Maine Conditioning Company and has a telephone number of 207-933-5770.

You may want to double check to make sure that the head pressure regulationg valve is set for the right PSI. In the older Zephyr models, the pool was used for head pressure control and pool water overheating could be caused by the wrong setting on this component.

I'd tell you if I remembered what that setting was, but that is a 15 year old memory and not reliable enough.

Good Luck