BPatrick wrote:A couple of things as I have two and I'm getting to know the ins and outs really well.
*The entire backpipe needs to be airtight. It will greatly effect draft if over the fire or outside air seeps through at any point. As this is a base heater they do need a good draft. A little bit of over the fire is one thing but several points of air leak will dramatically effect the stove in baseheater mode.
*The postion of your exhaust pipe to the chimney is low. It will not effect your stove in baseheater mode at all because with backpipe dampener closed your gases and heat go through the inner barrel down and around the firebox and then out the bottom of the backpipe and then up to exit out. Now the area where the firepot meets the base of the stove must be airtight or you'll have issues with the stove going into baseheater mode and holding the temps. This is the area where my Crawford has issues. Along with some areas of the stove where air was getting in. Once I sealed the over the fire air, even with a seal issue by the fire pot, it didn't really effect the stove. They work well even with minor problems. Over the fire air seeping in is your worst enemy because it cools your air exiting the stove and slows the draft and then cools the stove.
*Please check and see if this is the correct back pipe for the stove. On both my Crawford base heaters, the exhaust exit to the chimney is higher, look at my threads and William's, it's right at the top on the other side of the direct/indirect (base heater) flap. Someone may have put this one on but I don't think it's correct. You have the collar, you can have the exhaust exit raised and the barrel remade. Again, in base heater mode it will not hurt the stove, but in start up mode or direct draft you could have issues. I'd use Cowboy Charcoal and fluid to get a hot fire immediately, this will overcome the issue but you'll be running your stove in direct draft mode for at least 20-25 minutes or longer to get your coal going and up to temp. I'd also use stove coal as it will allow air to flow around it much easier getting started. I use stove coal and get ridiculously long burns with it. I hope this helps.
The position of the outlet flange is as high as I can put it due to the height of the fireplace lintel, it is 31 inches off the hearth.
The MKII is setup with the bottom of its exh pipe @ 22.5 inches off the hearth.
So since it uses a 6 inch pipe It would be possible to get another 2.5 inches of height @ 31, just missing fouling the lintel.
I do not want to modify the T pipe setup going through the damper plate in the chimney, to get to 31(although it's possible) because I consider the MKII my "Mother" stove.
In other words, if, Mrs. Crawford does not operate correctly, I can swap the MKII right back in an hour or so with no T pipe mods.
If you go back and see, I actually raised the exh port about 3 inches from where it was as received.
Also Emery and Brandon assured me that my chimney setup will draft it no problem, I have seen .12+ WC even on 35 * days.
I'm sure the back pipe is gas tight as I sealed it well with cement.
I will post all my findings Saturday for all to see.