HLF & FR

HLF & FR

PostBy: spc On: Sat Feb 23, 2008 12:53 pm

Does HLF setting speed up the FR when the stove calls for heat & slows the FR decline when stove reaches temp. Thanks.
spc
 
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: Pioneer

Re: HLF & FR

PostBy: WNY On: Sat Feb 23, 2008 2:32 pm

YOu have to have a certain Rev. Level on your Coaltrol for this to actually work.

Scroll down a few posts in this thread, this has been discussed a lot.
HLF(heat loss factor)

Our house is quite large and cools quickly, I set mine for 2 and seems to work quite well and maintains setpoint with 1 degree.
WNY
 
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker, LL & CoalTrol
Stove/Furnace Model: 90K, Hyfire I, VF3000 Soon

Re: HLF & FR

PostBy: pvolcko On: Sat Feb 23, 2008 6:57 pm

Does HLF setting speed up the FR when the stove calls for heat & slows the FR decline when stove reaches temp. Thanks.


Not exactly. HLF only affects behavior upon setpoint changes (either programmed or manual overrides). At the time of the setpoint change HLF will play into how much of an initial "bump" in FR is dialed in. After this initial bump it has no effect. It does not change the rate at which the FR will climb or fall after that initial change and it does not affect FR as setpoint temperature is reached. It was a safe way to try to address the "overly damped" situation where it can take an inordinate amount of time to reach a new setpoint. This typically happened in situations where there was poor air circulation or the stove was undersized or the heating job being asked of it. As a last resort solution for the customer we wanted to offer a way to make the control make more aggressive on setpoint changes. It was intended as a last resort solution though. Only after trying to improve air flow and heat transfer in the dwelling (if possible) was this to be tried since it would have the effect of making the room the stove is in get even hotter during the setpoint change while the rest of the house plays catchup.

We've been working on other methods of making the control more responsive on setpoint changes, some of which do affect rate of change on the FR. We plan to have one of these methods replace the HLF method in the next version of the thermostat software.
pvolcko
 

Re: HLF & FR

PostBy: spc On: Sun Feb 24, 2008 10:18 am

Thanks Paul, One more question, when you set a day or night set point, say daytime 6:00AM @ 72*, does the coal-trol anticipate the set point earlier & start feeding earlier to reach temp at 6:00AM or does it start ramping up at 6:00AM?
spc
 
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: Pioneer

Re: HLF & FR

PostBy: pvolcko On: Sun Feb 24, 2008 3:07 pm

Sorry, there is no anticipation of setpoint changes. If you're wanting a setpoint to be hit at a given time it is up to you to set an earlier time. This is a feature that's been requested before and is on our to-do list. Someday we will get to it. :)
pvolcko
 

Re: HLF & FR

PostBy: spc On: Sun Feb 24, 2008 3:24 pm

I figured it worked like a conventional digital t-stats. Not a problem at all. Hope the auto igniter is coming along. Thanks.
spc
 
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: Pioneer