Blower Alignment With Stove Inlet

Uglysquirrel · Post by **Uglysquirrel** » Mon. Aug. 25, 2008 9:14 pm

My 2007 Mark II's blower opening does not line up with the opening in the stove. 1/2" vertical mismatch. Reason: the blower housing hits the 1/4" plate steel rim at the stove bottom before the blower flange fully seats into the three sided slot. Not a killer issue.

A 2-3" long cardboard plenum was jury rigged to align the two openings and found (hand test) that the CFM out the two frt openings is slightly greater. The stove/fan assembly is a lot quieter, too. Maybe a sheet metal duct or flex pipe connecting the two openings would work...or start grinding the rear edge of the stove away (not gonna happen).

Anyone else have this same offset issue?

CapeCoaler · Post by **CapeCoaler** » Mon. Aug. 25, 2008 9:43 pm

Flip the blower.
Housing points up no grinder necessary.

Uglysquirrel · Post by **Uglysquirrel** » Tue. Aug. 26, 2008 6:00 am

Cape, thanks for the advice. Is it an honorable thing to admit that I'm terribly stupid?

;]

CapeCoaler · Post by **CapeCoaler** » Tue. Aug. 26, 2008 7:33 am

Yes.
At least you rigged the tube before grinding.
When I first hooked up the Mark II the fan went on upside down also.
It just seemed wrong the other way.

titleist1 · Post by **titleist1** » Tue. Aug. 26, 2008 8:55 am

"Is it an honorable thing to admit that I'm terribly stupid?"

You have joined a long list of "honorable" people, a lot of us are here on this board, who lost our firm grasp of the obvious on different occasions!!

cooper · Post by **cooper** » Tue. Sep. 02, 2008 8:19 pm

On my Harman Mark II the blower makes viabration sounds. I have tried wedging metel shims ect.between the fan and housing. But they in time come back. Has anyone else had this problem?

Uglysquirrel · Post by **Uglysquirrel** » Tue. Sep. 02, 2008 8:54 pm

Cooper, I'm not the guy to ask about long term vibe issues on Harmons but I did make a cardboard tube between the stove inlet and blower inlet and any vibe coupling that there was between the blower and stove went way down. So all that kind of suggests some sort of metal tube or exhaust pipe flex hose could be made to separate the two.

I guess one thing that is not good is leaving the blower in place with it OFF and then really cranking the stove. The heat can't be great for the blower windings, etc.

Just my opinions that are sometimes less knowledgable that others of more expertise.

gambler · Post by **gambler** » Tue. Sep. 02, 2008 8:59 pm

You could try making a cork gasket and put it between the blower and stove to see if that will cut down on some vibration. Also try loosening or tightening the blower bolts to alter or delete the sound.

CapeCoaler · Post by **CapeCoaler** » Tue. Sep. 02, 2008 9:53 pm

I just move it around till the noise stops.
Have not made any attempts at gaskets.
It is the metal on metal vibration that makes noise.
Isolate the vibration noise goes away.
Remote axial fan, aluminum flex hose, adapter with gasket, staged thermostatic fan control....
Now that is a plan