Newbie... Need Install Advice For Farenheit Endurance

Finally insulated and installed the last cold air return extension from main duct. My wife helped me when I installed the long extension that was 10ft long. Ohh that sure was FUN FUN FUN

But last night we added the final section, the 4ft piece. Again FUN

Thanks Hun for your help, sorry about the skin irritation you got from the Fiberglass insulation when you took your gloves off to sweep

The best part was when we were done my wife looked up and said, "wait...which piece did we just put up and which was already here?" Then I smiled and thought its that good huh!

 

Also wondering since I happen to see the wires, are the wires from the tstat for the AC go straight to ac or do they run to furnace ?

Does the endurance have to be hooked up to millivolt on tstat?

Worst case senario, could I unhook 2 wires from ac and hook up tstat end to the endurance. I am not sure if it's DC or not.

In the manual it says break in period is 15 bushels of fuel or 2 weeks continuous burn. Can someone explain? Meaning no Fuel Mizor or Tstat mode till after break in?

 

Got the cold air return fitted, I have to insulate it next. I am going to insulate the outside air duct to prevent frost. Then I have to make a damper for the original furnace above the AC coils.
After that I should be ready to fire

 

I gotta figure something out for my cold air return. I have to build my own box to attach to the furnace. With all this time on my hands, it shouldn't take to long. I still have to get that square backdraft damper for the dino furnace. Your progress is coming along at a good pace

 

Thanks, another member on here gave me the idea of using a "shelf" inside the plenum so a piece of sheet metal can sit on it. Rather than use a real damper which would involve removing a lot of the ductwork to get it installed if I could find that size.

 

So I checked on the main house thermostat, there are 2 spare wires. A blue and what looks white or grey.
How would I hook it up so I can control the new furnace? The endurance I believe is millivolt.

 

Are you planning on hooking up a second thermostat for the pellet furnace? I have mine set that way. One stat goes to the oil burner and the other goes to the pellet eater. They are right next to each other in the wall. If we're away from home and the pellet eater stops, the oil burner will kick in and take over.

 

You must have the pellet ran independent than. Cause with dampers installed you can't have the furnace operate unless you manually open the dampers.

I was trying to see if I can run the pellet off the same tstat. Nobody seems to know

 

Good one. By setting the oil furnace T-stat lower than the Fahrenheit(only if it can keep up on temp demand) in case the Fahrenheit turns off for whatever reason then the oil furnace will kick on as a back-up with the backdraft damper in place on the oil furnace.

 

Yeah if using real backdraft dampers that are automatic it's great. But on Manual dampers that won't work.

 

The problem with real backdraft dampers which open and close on there own with draft is they are limited in sizes and unless you are doing a new install, you would have to remove a lot of duct to fit in. But since you can't run both at the same time anyway, they are only useful in the situation where you set the tstat lower and want your furnace to kick in if pellet goes down if your not home. I don't run heat when I am out, I have seen many fires from malfunctions. So if pellet goes down, I'll have to open the furnace damper and close the pellet damper.

 

Works on mine. I have a piece of sheet metal that I slide in my plenum. I made a 'shelf' on three sides inside the plenum that the sheet metal damper sits on. If the oil furnace blower turns on, the damper plate lifts off the 'shelf' and the air goes through the plenum. When the oil furnace blower turns off, the plate drops back down as the slot in the plenum that the plate slides into acts as a hinge point. There is a butterfly damper on the Fahrenheit, so that side is good to go. I tested it out to prove the theory and it does work. Is it elegant? No. Is it functional and do what I need it to do? Yep.
I suppose you could run the thermostat in parallel between the units if you killed power to the primary furnace. Too risky in my opinion. A $20 thermostat dedicated to the pellet furnace is good peace of mind.

 

I see what you mean, the Air Force pushes up the sheet metal and it "floats" while running. Seems like a major block of air but if the heat comes through and the furnace hi temp switch doesn't knock out the furnace then why not. I am going to use the method you told me for a damper. Cut open the plenum above a/c coil and enter that way.
That's my next step in this project since I cleaned up the install tonight.

 

I'm sure it cuts down the air flow some, but probably not enough to cause an issue. I used a fairly thin gauge sheet metal so it flexes easily. The plenum on my furnace is pretty large and there's nothing for it to hang up on when it flips up.

In the two years I've had the furnace, the oil furnace hasn't ever had to kick in unless I intentionally turn it on which I do a couple times a season just to make sure it still works.

Don't get me wrong - a real backdraft damper is the way to go, but this was the only practical solution I could come up with short of redoing the entire plenum. Sometimes a little redneck engineering does the trick.

 

Did you guys do the breakin period for the furnace?

 

Did you guys hook up your pellet to millivolt?

 

Bought used so can't help you there. I painted some sections on mine and it smelled the first night.

Still looking for a swinging millivolt T-stat. Get one like AMC343, the LUX.

 

Yeah I have 2, gonna check if they are millivolt

 

I have a digital thermostat that says it can do 24v or 750mv. It's a basic on/off with heat/cool settings. No programming.
Since the thermostat has no 24 transformer hooked up it will run off 2 AA batteries.

Do I just need to hook up R and W?

R will bring the millivolts and W will bring heat input to furnace?