Great use of built-in fresh air features on Ecojay SmartZone-4X zone control system. More details about how to wire one yourself can be found below.
What it does:
FRESH AIR = Equipment FAN (Blower) Runs & Fresh Air Damper Opens
1 = RUNS “x” MIN Per Hour*
2 = RUNS “x” MIN Per Hour* ONLY with EQUIPMENT
3 = ON
4 = OFF
* USE PUSHBUTTONS on SmartZone TO SET “x” MIN RUN TIME PER HOUR FOR FRESH AIR (SEE SmartZone Install Guide)
Today's homes are built with non-porous insulation & air-tight windows & doors to gain the most efficiency possible from the heating & cooling systems. This keeps the outside environment from changing the indoor conditions as much as possible. The down-side of these methods is that virtually NO fresh air (outside air) ever gets into the home. This can mean that the air inside the home can be high in toxins such as VOCs, CO2 & dead skin cells. Of course your air filter (if it's working properly) should remove the larger particulates from the air but some toxins will not be trapped and the only way to remove them is by bringing in outside (fresh) air. The air outside your home is usually cleaner and healthier than inside your home, so, periodically allowing fresh air into your home will make for a much cleaner & healthier living environment. Using the Fresh Air feature of the SmartZone-4X can automatically manage the fresh air intake into your home & with the rotary switch wired as shown below, you can take more control of when and when not to allow fresh air.
A 4 position rotary OFF-ON-ON-ON switch should be used and wired as shown below.