Monometer Install and Baro Location

DENNIS BAUER · Post by **DENNIS BAUER** » Mon. Dec. 21, 2015 1:50 pm

Hello Everyone,
Alright I think I'm a little special or something because I can't seem to find what I'm looking for.
1. I've spent the last two hours trying to find a thread that shows how someone actually mounted the monometer into the stack. I have to be missing something. I'm using the search and find a ton of information but nothing with pictures like I thought I'd find. I must be missing something.

2. I have the baro mounted directly on top of the stove then about 2.5 to 3 feet of pipe vertical to the outlet through the ceiling. Is it ok to have the baro that close? and where do I mount the Monometer line if it is right on top of the stove?
The reason the baro is directly on top of the stove is bc that is the only way I could lay the stove out and have the pipes fit together in the fashion that the top always fits into the bottom, the exception would be where the baro is because it would be "male/male" on either side.

I know I must be doing something wrong that I can't find this information on here. I'm on the site at least an hour a day during the week. (work is slow).

Thanks for the help guys.

Post by **Lightning** » Mon. Dec. 21, 2015 3:06 pm

What model manometer are you installing?

Sunny Boy · Post by **Sunny Boy** » Mon. Dec. 21, 2015 3:17 pm

Dennis,
This link to the sticky at the top of this page pretty well covers manos and the wheres and hows of installing them.
Manometer Install Did that not answer your questions ?

Plus, if you do a search using over in the hand fed section I know there's been a lot of info and pictures posted about mano's and their use in threads there.

Paul

DENNIS BAUER · Post by **DENNIS BAUER** » Mon. Dec. 21, 2015 4:18 pm

Lee,
I'm installing a Dwyer model II that is suggested on here a lot.

Sunnyboy I did look down through there. I'm only about 6 pages into it right now but didn't really find a detailed pictures of what I was looking for.
Also I didn't see anything much about where my Baro is located and where you would mount the Monometer plug if it is right on top of the stove.
is it ok to put it on the opposite side of the baro T?

Post by **Lightning** » Mon. Dec. 21, 2015 4:53 pm

You can probe the mano above the baro if you want, it will read the same.

Post by **Lightning** » Mon. Dec. 21, 2015 5:20 pm

I'm more concerned with the location of the baro. Being directly over the stove, it might take in super heated air to try to cool the flue gases with, which could hinder it's operation.

Can you post a picture?

WNY · Post by **WNY** » Mon. Dec. 21, 2015 6:07 pm

There's a lot of good threads/pics on the Manometer install thread.

"typically" the baro should be mounted 12-18" from the stove in a straight piece of pipe. you'd have to mount the probe location for the manometer somewhere near the stove between the stove and baro. you can probably mount the probe hole on the opposite side of the baro.

You could always have the pipe cut shorter and most stove places can crimp it so it fits properly.

DENNIS BAUER · Post by **DENNIS BAUER** » Tue. Dec. 22, 2015 7:32 am

Thanks for the help guys and I will try to get a picture up loaded as soon as I can.

Looks like the weather is going to be warm so maybe I'll shut down tomorrow and see if I can rearrange the pipes and get the baro up off the top of the stove. I just liked the look of the baro pipe going around the welded exhaust port on the top of the stove.
I do own a set of crimpers so I can always swap it and do it the correct way with the pipe coming down into the stove.

scalabro · Post by **scalabro** » Tue. Dec. 22, 2015 7:57 am

Lightning wrote:You can probe the mano above the baro if you want, it will read the same.

That was not the result when I had a baro damper installed on my Harman MKII. The stove side manometer reading was always pretty close to what the scale on the baro damper read (until it got fly ash build up). But the chimney side manometer reading was always higher than the stove side when the baro was in operation (baro door open....colder days). On warm days when it was closed both manometer readings were the same.

Post by **Lightning** » Tue. Dec. 22, 2015 8:14 am

I kept getting challenged on this issue so I tried it many times under different circumstances two different heating seasons and the reading always the same before and after the baro lol.

Not sure why it would be different for you

scalabro · Post by **scalabro** » Tue. Dec. 22, 2015 8:26 am

Lightning wrote:I kept getting challenged on this issue so I tried it many times under different circumstances two different heating seasons and the reading always the same before and after the baro lol.

Not sure why it would be different for you

Good question Lee. But the readings made sense to me at the time so I never bothered to ask here as It was nothing to drill an additional hole for my handheld manometer.

Post by **Lightning** » Tue. Dec. 22, 2015 8:48 am

Right. My results made sense to me based on how pressure behaves. So, see we have contrasting results and opinions about how things work lol.

scalabro · Post by **scalabro** » Tue. Dec. 22, 2015 9:06 am

Agreed

All I can say is that the appliance side is the regulated side of the damper, so in reality it does not matter what goes on above the baro.... It's the stove side that matters

Post by **Lightning** » Tue. Dec. 22, 2015 9:22 am

scalabro wrote:Agreed

All I can say is that the appliance side is the regulated side of the damper, so in reality it does not matter what goes on above the baro.... It's the stove side that matters

Ah.. an epiphany strikes me. We assume the stove side is the regulated side because of the direction of flow. But in reality both sides are regulated. OMG you rock! Thank you for helping me figure that dilemma out!

It's what I love about this coal burning experience. Always learning, always understanding more as time moves forward. This is a big day for me. Like Nov 5, 1955 big. Thank you partner

Edit - fixed date, discovery of the Flux Capacitor

Post by **Lightning** » Tue. Dec. 22, 2015 9:53 am

There is negative pressure on both sides of the baro. Both caused by the chimney. The baro doesn't choose to satisfy just the upstream side or the downstream side it goes to both. The pressure moves from areas of high (thru the baro door) to areas of low (both sides of the pipe) which explains why I see the same pressure on both sides. And that my friend is the nuts and bolts of it.

Although, I still would opt to probe the mano as close to the stove as possible just because it seems like the right thing to do.

As being a "nutty professor" I relish in the details, it's what makes me tick lol