EWC Controls Forum

My second stage compressor setting keeps dropping out when all zones (3) are still calling. I have the supply sensor installed. It will come on, drop out then come back in. This is causing some annoying airflow noise.I may actually read the book and solve this before any posts.

3 zones on a 2 speed Rheem 17 SEER system The board, zone controls and motorized bypass has worked flawlessly for over a year. I am testing a wireless Honeywell stat in my bedroom and it works great with it. I had to buy the 3 ton system which took me 1/2 ton higher than the old system because it ...

Check the position of the RA/DA micro switch. It should be in the DA position(to the right). #5 on the bottom bank of switches

Hold down reset for 5 seconds if you change it.

I would need to get married again and have a few crumb snatchers to give an average on the water savings. I save more because I use less with the tankless method. I think the rule of thumb is that your water heater is anywhere from 20 to 30 percent of your electric bill. My HVAC system is a 2 stage ...

The value of the setting of the RA/DA switch should be stressed with bright colors, flags and balloons.

Well I have solved this problem but I dont know if the board is suppose to work this way. If I move the dial below the 7 minute mark on the staging dial, stage 2 never kicks in. Set it on the high side of 7 and it works.

One year after a new heat pump system with zoning. I also installed a tankless water heater and run it on LP gas.

I have one in my home and I noticed that with the 50% rule in the "on" position on the board it was not activating Y2 which energizes my 2 stage compressor. I am using 3 zones and all 3 thermostats were calling. I have tried resetting the board. I have the timer set to off.