harmon mark I questions

harmon mark I questions

PostBy: vulcan On: Sun Mar 17, 2013 2:01 am

I have been looking for a smaller hand fired unit to put in a 1000sf shop and have found an older harmon that I believe to be a mark I sitting outside. I was wondering if there is anything special that I should look for other than being sure the grates are intact. The unit needs some work including new gaskets, new window, and a good cleaning but appears to be complete and could be aquired for a cheap price. i just thought I would throw it out there to the harmon users, I have seen all the posts about poor customer service but I do have a dealer nearby that should be able to get the parts I would need.

thanks in advance for your help
vulcan
 
Hot Air Coal Stoker Stove: keystoker koker 160

Re: harmon mark I questions

PostBy: lowfog01 On: Sun Mar 17, 2013 6:57 am

Hi,
I just picked up a used Mark I and it had a crack in the rear baffle that my repair guy thought may have been a flaw in the manufacturing process. There is no sign of any over firing or other misuse. I’d take a look for a crack on the lower portion of the baffle both from the fire box side and the rear exit; use a flashlight. My main stove is a Mark II and I’ve never had any problems with it and think the quality is very good. So good in fact that I don’t worry about the company’s bad customer service reputation. Any company may let a lemon slip by once in a while but is it the norm - nope, not with a Harman. Good luck, Lisa
lowfog01
 
Hand Fed Coal Stove: Mark II & Mark I
Coal Size/Type: nut/pea

Re: harmon mark I questions

PostBy: freetown fred On: Sun Mar 17, 2013 6:59 am

Sounds like you got it covered vulcan--she should do 1000 sq nicely:) I could state the obvious & just say check for cracks LOL
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

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Re: harmon mark I questions

PostBy: titleist1 On: Sun Mar 17, 2013 7:57 am

check the condition of the baffle over the firebox. the fly ash tends to accumulate there and if not cleaned before summer storage it would really corrode that plate.
titleist1
 
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite

Re: harmon mark I questions

PostBy: loxety On: Sun Mar 17, 2013 11:32 pm

titleist1 wrote:check the condition of the baffle over the firebox. the fly ash tends to accumulate there and if not cleaned before summer storage it would really corrode that plate.


Whats the proper way to clean that area?
loxety
 
Hand Fed Coal Stove: Harman Mark II
Coal Size/Type: Blaschak Nut

Re: harmon mark I questions

PostBy: SMITTY On: Sun Mar 17, 2013 11:38 pm

I tape a smaller 1.5" vacuum cleaner hose to the 3" hose on my Ryobi vac. That fits up inside there from the firebox and the exhaust to get the majority of it out. You'll never get it all, so don't bother trying. ;)
SMITTY
 
Stoker Coal Boiler: Patriot Coal - custom built by Jim Dorsey
Hand Fed Coal Stove: Harman Mark III (not currently in use)
Coal Size/Type: Rice / Blaschak anthracite
Other Heating: Oil fired Burnham boiler

Re: harmon mark I questions

PostBy: vulcan On: Mon Mar 18, 2013 7:43 am

thanks for the info and the tip on the baffle I will check it out.
vulcan
 
Hot Air Coal Stoker Stove: keystoker koker 160

Re: harmon mark I questions

PostBy: titleist1 On: Mon Mar 18, 2013 9:58 am

loxety wrote:
titleist1 wrote:check the condition of the baffle over the firebox. the fly ash tends to accumulate there and if not cleaned before summer storage it would really corrode that plate.


Whats the proper way to clean that area?


Same strategy as Smitty...I have a 1-1/2" flex hose from an old small shop vac that has a 2" adapter to fit on my bigger shop vac. I would snake that smaller hose up in that area from the front and reach what I could, swishing it around in there. I would then go in from the exhaust port on the back getting the fly ash that accumulates on either side of the port and then snaking that hose on top of the baffle from the back side. Like Smitty said you're not going to get every last bit of it but you will get 95% of it if the hose is flexible enough and you can move it around once on top of the baffle.

I would usually do this about 1/2 way through the heating season also. It would help with the heat transfer to the tubes over that baffle that the distribution blower uses.

I use the drywall dust bags in my shop vac to catch the fly ash before it hits the canister filter. I go through about 2 bags per season.
titleist1
 
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite

Re: harmon mark I questions

PostBy: jpete On: Mon Mar 18, 2013 11:15 am

I rigged up a similar "adapter" for my shop vac that uses a length of 1/2" Pex I had leftover from a plumbing job, some pipe insulation and a fair amount of duct tape. :D

Good call on the drywall bags. I'll have to see if I can get some.
jpete
 
Hand Fed Coal Stove: Harman Mk II
Coal Size/Type: Stove, Nut, Pea
Other Heating: Dino juice

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