Hi everyone... Im trying to get my heat started in my addition. In the addition I have A Heil air handler with an Aqua coil attached to it. I have a NG Navien combination boiler with a taco box in the basement that controls both zone circulators. I have an 18-3 wire running from the basement up to the T stat. from the T stat i have an 18-5 wire. I installed the Aquastat onto the "inlet" side of the water supply conduit going into the aquacoil. what I am trying to do is... have the T stat control the circulator ( which i have managed to do ) I am now trying to get the fan to come on once the water temperature reaches (140*?) So... do I need to run 120v to the aquastat "R" (line) and white to the "W"? It looks like the leads going to the fan are Yellow and black.. which do i break? what wires go where help please .. I can post pictures if needed

Asking another way and appreciate opinions. Have a 25 yr old Peerless boiler w/ coil. Appro. 1800sqft, poorly insulated Levitt house w/ 3 zones. The current plumbing is a nightmare of patched together zones, zone valves and circulators. When heat is on to a zone, how water drops terribly. When more than 1 shower head or shower plus anything (heat, dishwasher, etc), is running, hot water drops in a minute. Impossible to fill bathtub unless using the shower head which takes 1+ hours. Unfortunately very tight space so I have 2 proposals: 1. New Peerless WBV-03 with Buderus S120 (32 gallon) Indirect tank. 4 zones, correctly and efficiently plumbed. Advised the 32gal is all clearance will allow. 2. Create access panel and just add S120 indirect behind current boiler on separate zone. I am not opposed to either plan and prices are great for both. ($5500 for plan 1, $1850 for plan 2). Reputable guy. Many references. Knows these houses and their unique issues. I do purchasing and know the going rates of the equipment and think it's all fair and on the up and up. 2nd quote is in the same ballpark. My biggest question is WILL I SEE IMPROVEMENT IN HOT WATER!? I know recovery on coil (if new is 3-5 gals per min, my current one, who knows?). Recovery on tank is 260 gals per hour. Will the tank replenish continuously? Hate to do this if no improvement in hot H2O. I know oil efficiency will be better due to not running as much during warm weather months. Unfortunately, gas is not an option and a larger tank not an option. 3 of us but we like long showers and unlimited hot water. Sorry for the long winded question. Appreciate any answers. I need to pull the trigger asap. THANK YOU!!!