Harman "Stove Temp" results

[rickwai]

I hooked up my DDM to log what each number 1-7 represented in target ESP temperature. Here are my results:
1-251F
2-308F
3-343F
4-378F
5-411F
6-444F
7-470F

 

[Mt Bob]

I hooked up my DDM to log what each number 1-7 represented in target ESP temperature. Here are my results:
1-251F
2-308F
3-343F
4-378F
5-411F
6-444F
7-470F

Cool. I still would like to see someone hack the programming, so the same info as a DDM could be displayed on a lap top. The price of DDM's is just stupid, very few own one.

 

[jackman]

Hmmmm, help me out what is a DDM? Google gives all kinds of answers that I don't think relate to this topic.

 

[gfreek]

Harman DDM, Diagnostic Display Module
(broken link removed to https://pellet-stove-parts-4less.com/products/harman-diagnostic-display-module-3-20-05401#)

 

[bogieb]

So because I'm ignorant - does that mean that that is the temp of the exhaust being sent outside?

 

[SciGuy]

So because I'm ignorant - does that mean that that is the temp of the exhaust being sent outside?

Yes. That said, the temperature where the ESP resides in the tail pipe. Closer to the end of the vent pipe would be a bit to a good bit cooler. I can imagine condensation happening near the vent outdoor exit when it's really cold out at running at "stove temp 1" .

 

[Tonyray]

does this indicate it is a waste of heat to run in harman stove temp?

 

[SciGuy]

does this indicate it is a waste of heat to run in harman stove temp?

Not really. The exhaust temps would be in a similar range at times if the stove was run in room temperature mode instead. They'd be on the higher end when the stove was ramped up to bring the room back to to a set temperature an towards the lower end and even lower was the stove shot down between calls for heat. The upshot is you'd see a constant swing from high to low over time when run in room temp and a very constant reading when run in stove temp.

YMMV

Hugh

 

[rickwai]

does this indicate it is a waste of heat to run in harman stove temp?

Not really. The stove is adjusting feed to maintain a consistent temp using the exhaust probe instead of the room sensing probe. My parents have a 1850's brick farm house. It will take all the heat you can throw it it. They use stove temp so it runs at a constant temp to supplement the wood stove and gas furnace.

 

[rickwai]

Cool. I still would like to see someone hack the programming, so the same info as a DDM could be displayed on a lap top. The price of DDM's is just stupid, very few own one.

Yes they are expensive. I use it to check ESP and room temp sensor most. Also it helps to see if pots are reading correctly. Way to expensive to have for a single stove.

 

[Pete Zahria]

I don't measure the exhaust, I measure the "stove temp", in stove mode.
I have one spot on the right side of the stove that i measure with a temp gun.
Mostly, it tells me when the stove is not running as well as it should.
I know what temp, when it is clean.. and compare that to whatever I read later.
Also I know how high it gets on ramp up... I can compare that as well..

Dan

 

[SciGuy]

I don't measure the exhaust, I measure the "stove temp", in stove mode.
I have one spot on the right side of the stove that i measure with a temp gun.
Mostly, it tells me when the stove is not running as well as it should.
I know what temp, when it is clean.. and compare that to whatever I read later.
Also I know how high it gets on ramp up... I can compare that as well..

Dan

Dan,

Are you looking at what stove surface temperature you're getting for a specific "stove temp" mode setting and if so does a decreased surface temperature tell you that the stove needs cleaning?

Thanks,

Hugh

 

[Pete Zahria]

Dan,

Are you looking at what stove surface temperature you're getting for a specific "stove temp" mode setting and if so does a decreased surface temperature tell you that the stove needs cleaning?

Thanks,

Hugh

Usually a good indicator... For me..

Dan

 

[Mt Bob]

Yes they are expensive. I use it to check ESP and room temp sensor most. Also it helps to see if pots are reading correctly. Way to expensive to have for a single stove.

Got mine cheap, stove shop closed up. Wish I had bought the other one they had.

 

[Tonyray]

Not really. The stove is adjusting feed to maintain a consistent temp using the exhaust probe instead of the room sensing probe. My parents have a 1850's brick farm house. It will take all the heat you can throw it it. They use stove temp so it runs at a constant temp to supplement the wood stove and gas furnace.

Lately i have been exp with stove mode. Always knew that mode loves pellets. Our house is 1920 not well insulated. Room temp auto is ok but no sooner satisfied then back feeding again for next fireup. Anyways, have read not good to run lower feed rate .P61A. But, if i dont the place gets waay to hot. So, have been setting feed at #2, temp at maybe 65 or whatever the whole number is and fan on low for stove mode. this keeps our downstairs around 72 with enough heat to travel up the steps to bedrooms. All and all this works best But not sure if that low feed rate would damage the auger. Should mention burning doug firs so that really helps kick some major heat out withvthese lower setting. Of course when outdoor temps hit 40's i switch to room auto. Seems to use same amount of pellets in stove mode but room auto always wins due to ramping or shutting down when we have warmer temps..Thoughts??

 

[mtnbiker727]

Lately i have been exp with stove mode. Always knew that mode loves pellets. Our house is 1920 not well insulated. Room temp auto is ok but no sooner satisfied then back feeding again for next fireup. Anyways, have read not good to run lower feed rate .P61A. But, if i dont the place gets waay to hot. So, have been setting feed at #2, temp at maybe 65 or whatever the whole number is and fan on low for stove mode. this keeps our downstairs around 72 with enough heat to travel up the steps to bedrooms. All and all this works best But not sure if that low feed rate would damage the auger. Should mention burning doug firs so that really helps kick some major heat out withvthese lower setting. Of course when outdoor temps hit 40's i switch to room auto. Seems to use same amount of pellets in stove mode but room auto always wins due to ramping or shutting down when we have warmer temps..Thoughts??

Have you tried room temp manual? Like stove mode, except intelligent. Our house is definitely warmer when the stove gets hot from burning for a while, you can feel it in the floor and the walls. But when the temp is satisfied, maintenance mode doesn't use a lot of pellets unless you open a door or something and the stove demands more heat, but even then the stove is already hot, so sometimes all it does is kick the fan on.

I can't prove it, but I think in Auto it cycles so much that it uses more pellets than in room temp manual, but you're not as warm. In Auto the initial fire uses a LOT of pellets, and then it satisfies the temp and dies down and the stove gets cold and the room gets cold, and then it kicks back on and uses a LOT of pellets, wash rinse repeat.

 

[Mt Bob]

Have been told by older Harman tech's that over time, running mostly on low will erode the end of the auger. Sure have not heard much about this happening in the last 10 years.
My question would be, why not leave the feed rate where it should be, and turn the number dial to #1. You say 65, which I think is equivalent to over #3. The temp numbers mean nothing when stove is in "stove" mode. The number settings relate to a preprogrammed temperature that the exhaust probe will try to keep steady, by varying the auger. Also, you can set room fan in other settings,as in lower, even off, in stove mode.
Anyway, I suppose you are accomplishing the same thing, whichever way you do it. I use all modes, depending on conditions/weather, but don't think i have ever turned mine,in stove mode,in warmer weather,below 2-3, i just turn blower down to low or off.
I would suspect that your way might be making the auger run more.

 

[Mt Bob]

oh,ya, as mtn just posted, when i use stove temp,i use manual, but on colder days and nights,I use room temp manual, which is basically a Hi-LO mode anyway, and stove does not stop and start as much. My stove has been running that way all day today, t/stat(remote) set at 68.

 

[Tonyray]

Have you tried room temp manual? Like stove mode, except intelligent. Our house is definitely warmer when the stove gets hot from burning for a while, you can feel it in the floor and the walls. But when the temp is satisfied, maintenance mode doesn't use a lot of pellets unless you open a door or something and the stove demands more heat, but even then the stove is already hot, so sometimes all it does is kick the fan on.

I can't prove it, but I think in Auto it cycles so much that it uses more pellets than in room temp manual, but you're not as warm. In Auto the initial fire uses a LOT of pellets, and then it satisfies the temp and dies down and the stove gets cold and the room gets cold, and then it kicks back on and uses a LOT of pellets, wash rinse repeat.

My problem with room manual is the heat going out the exhaust during the maint mode. Sometimes as long as 15 minutes while the blower is off. I am heating my neighbors yard during that time.

 

[Tonyray]

Have you tried room temp manual? Like stove mode, except intelligent. Our house is definitely warmer when the stove gets hot from burning for a while, you can feel it in the floor and the walls. But when the temp is satisfied, maintenance mode doesn't use a lot of pellets unless you open a door or something and the stove demands more heat, but even then the stove is already hot, so sometimes all it does is kick the fan on.

I can't prove it, but I think in Auto it cycles so much that it uses more pellets than in room temp manual, but you're not as warm. In Auto the initial fire uses a LOT of pellets, and then it satisfies the temp and dies down and the stove gets cold and the room gets cold, and then it kicks back on and uses a LOT of pellets, wash rinse repeat.

Yes. Agree on the auto mode.

 

[Tonyray]

oh,ya, as mtn just posted, when i use stove temp,i use manual, but on colder days and nights,I use room temp manual, which is basically a Hi-LO mode anyway, and stove does not stop and start as much. My stove has been running that way all day today, t/stat(remote) set at 68.

I thought stove manual is ambiance mode.. flame but dist blower is off..??

 

[Mt Bob]

I thought stove manual is ambiance mode.. flame but dist blower is off..??

No, blower will still work, and will change speeds depending on temperature and the number setting. If you have blower set all way down(lo), but stove is set to 3 or above, you will notice it cycling. If set down to 1 or 2, it may not tun at all, depending on temp of incoming air,cooling down the fire,but, in that mode, if you turn fan up, it will run more an higher. There are sooo many adjustments in these stoves.

 

[bogieb]

My problem with room manual is the heat going out the exhaust during the maint mode. Sometimes as long as 15 minutes while the blower is off. I am heating my neighbors yard during that time.

I also didn't like that I was heating the outdoors at times so did some experimenting and found what works best for me. I normally let the stove run off the thermostat, but there are times that is inefficient and makes room temps fluctuate wildly.

I can keep the rooms at a constant temp during really cold days/nights (when the stove starts back up just at the end of the shut down) by using the feed dial instead of temp setting. I use stove temp / auto mode, with the temp dial at 6. I don't need big heat when the house is at temp, just constant heat and a feed rate anywhere between 0.5 and 1.5 usually does the trick. Using this method, the living room will stay about 73-74, the office (middle of house) at 69-70, and the bedrooms 66-68.

I find the flame is further forward in the pot as opposed to the deep throat burn of a maintenance mode when using room temp / manual. So, my thought is it would be more likely to cause a problem with the auger the other way. But, what do I know? I'm just guessing and really, that isn't any part of the equation when I burn this way.

 

[shtrdave]

For the last few years I have been running mine in Room Temp, Manual using a skytech remote stat. I have the feed set around 3, my distribution blower only comes on when the the stat turns the stove up.
I may not be understanding you, but can I set it some how so the distribution blower comes on occasionally when in the maintenance burn?

 

[shtrdave]

I may have to try this. I have never ran mine in stove temp mode. But a nice constant flow of warm air circulating at times would be very nice to have.

With my room stat set at 74 it drops to 72 and then shuts off around 77.

My place is insulated well but I seem to feel a draft. I have borrowed a friend thermal imaging camera and found a couple spots where I was getting cold air coming in and fixed them. but it still persists.