Aprilaire 76 Digital Wall Mount Dehumidifier Control

Works as expected. If you want the Dehumidifier to read the humidity at the location of Model 76 and not at the location of the device (1850 in my case), you have to setup the device to run in External Control mode. I had issues in making the device work in External Control mode and I could not find any documentation on the internet on how to address it. Eventually, I was able to fix the issue with help of Brent at technical support at Aprilaire. I am documenting the solution below. Solution: The main problem is unclear documentation. The model 76 remote works just fine in external control mode. You have to wire it as described, turn it on and let it be for at least 3 minutes. After 3 minutes the machine will turn on and you will see dehumidifying on the top right of the screen. Neither the Model 76 nor the main screen on the dehumidifier will give any display readout about it (it just appears that model 76 is on and nothing is happening at the dehumidifier). This is not documented in the installation instructions manual and what confused me / threw me off was the fact that when you use the same device in remote control mode it doesn't take 3 minutes to turn on, It just turns on immediately. I am assuming that it is performing air sampling at the model 76 location for 3 minutes before it turns on the machine but without any readout, I cannot be sure. Brent will try to have a reply written from Aprilaire's account about this and he will try to have them include this in the instructions manual down the line as well.

Bought to go with our whole home dehumifier. Was hoping it would be an actual percentage of humidity, it's based on a range of humidity, levels 1-5 according to the inside temperature which makes sense.

I had a Dehumidifier installed in my crawlspace. I didn't want to crawl into my crawlspace to check the unit and the humidity level and/if the unit has a error code on the display. So I installed this unit (in my closet) and configured it as a remote device. I can now see the current humidity levels in my crawlspace and if the unit has an issue, I'll know ASAP. Easy install (4 wires) and 2 switches to change on the dehumidifier. Instructions have all the details needed.

Installed and connected to an Aprilaire 1820 dehumidifer which resides in an encapsulated crawlspace. Handy little device that lets us monitor the dehumidifier status and humidity levels. Uses the 4 wire theromstat wiring and instructions were really straightforward. The 76 supports two modes, external and remote. However only Remote mode works with the 1820 which leads to some compromises. 1) You can't dial in a specific humidity setting only select between 1 and 7 with 7 being the driest relative humidity. 2) You can't tell the dehumidifier to run in circulation mode only. External mode apparently supports these features but, only with other models. Overall a simple to use unit that lets us know the condition of our crawlspace and state of the dehumidifier.

love that I can now control my dehumidifier from upstairs, less having to go into the crawlspace to check the humidity levels. Easy to install, good directions. would buy again A++