maximum sustained operating temperature

maximum sustained operating temperature

PostBy: joespond On: Mon Oct 27, 2008 8:36 pm

Hi,

I keep a thermometer on the top center of my harman MKII. When I need maximum output, what would be a reasonable maximum sustained temperature?

The hottest it has been was 550. I'm thinking 500 would be a little more reasonable. Does this sound right?

Bill
joespond
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Mark II

Re: maximum sustained operating temperature

PostBy: Patrick On: Mon Oct 27, 2008 8:41 pm

Hi,
From the manual it states that "when and if the stovepipes or connectors reach 500 degrees fahrenheit (maximum temperature), the stove is being overfired"

The hottest I've had our Mark II is 450 with coal. This is measured on the pipe a couple of inches from the stove connection. It's been hotter than that with a wood fire when getting coals to start a coal fire.
Patrick
Patrick
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Mark II

Re: maximum sustained operating temperature

PostBy: joespond On: Mon Oct 27, 2008 9:22 pm

Thanks,

I think 450 is more reasonable actually. I think I'll compare the top center temperature with the pipe in the back and see what the delta is. I found in the online brochure what you were talking about. I didn't see it in the beginning. They do mention pipe temps, not stove top temps, so I guess I should compare.

Thanks again,

Bill.
joespond
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Mark II

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Re: maximum sustained operating temperature

PostBy: joespond On: Mon Oct 27, 2008 10:36 pm

I currently measure 350 top center, and 280 on the elbow at the exit.

Good to know. Maybe I didn't get it as hot as I thought I did.

Bill.
joespond
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Mark II

Re: maximum sustained operating temperature

PostBy: Patrick On: Tue Oct 28, 2008 9:05 pm

Bill,

Your stove must be heating pretty well at that temp. Right now mine measures 180 on the Tee connected to the back of the stove. The stove top is 275. It was hotter an hour or two ago after I loaded it and let the new coal catch. It's on it's way back down to idle temp.

We've had a fire going for about 3 weeks now. We burn a hod a day, so I guess that's about 20 lbs? I leave the draft control open 3/4 of a turn. This keeps the temp on the Tee about 150 and the house at about 72. When I get home from work I open the draft and the unburnt coal from the night before catches. While it's livening up I empty the ashpan outside and refill the hod from the bin. When it's lively again I shake it down. Then I start loading up. I usually load the hod in two loads. I let the first load catch, then I load the second half. Right after the second load I turn the draft back to 3/4. I don't have to touch it for 24 hrs. When the colder weather hits my schedule will change and will go back to morning and night shaking and twice the coal.
Patrick
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Mark II

Visit Hitzer Stoves