Could be particular to just the one you got, or could be common to that model. Or a piece of wire doing the same thing? Or a skinny piece of wire fastened to the back of the flapper on the adjustment dial that sticks out into the pipe horizontally when flapper is closed then when it opens it would bring up against the top of the cylinder just before the flapper gets to the sticking point?īut either way I thinks it's a defect of the damper. 08, this control is so sensitive that instrumentation should be used when adjusting the unit during installation. Sangster, Collected Executive Summaries : Studies of the National. 02722701 6RC 6 RC STD Barometric Draft Control for Oil Wood or Coal Residential and Commercial Field Controls Product Dimensions, 7 x 7 x 4.7 inches. RCBT draft controls for coal or wood stoves is furnished with a Tee pipe section. RCBT draft controls for coal or wood stoves is furnished with a Tee pipe section. Could be a small long skinny bolt fastened into the top cylindrical part that the flapper would touch when open (would require drilling a small hole). CONCLUSION Metrology and calibration are of significant importance to the. I am wondering if you could add something on that would stop the flapper from opening just before it gets to the binding wide open spot. Sounds like there is a similar binding point on yours, but it's at the wide open point. I find the flapper has worked it's way sideways just a tiny bit to cause a bind - I just move it around & back in place until it doesn't stick shut again.
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