Boiler timer settings

Boiler timer settings

PostBy: plumber On: Tue Oct 18, 2011 7:42 pm

What are you boiler guys running for your timer settings? I started out with the factory 2 on 4 off, now I'm at about 1.5 on 5 off. It seems like I could stretch this out some more. I just had the boiler off for about a half hour to rewire my dump zone and once the fan came on she lot right up.
plumber
 
Stoker Coal Boiler: EFM 350

Re: Boiler timer settings

PostBy: plumber On: Thu Oct 20, 2011 6:53 pm

What I should also ask is how long can I stetch out the timer before I have an outfire? My boiler keeps creeping up and my dump zone is on A LOT and my basement is HOTTT!!
plumber
 
Stoker Coal Boiler: EFM 350

Re: Boiler timer settings

PostBy: WNY On: Thu Oct 20, 2011 7:00 pm

Whats your aquastat set at? 180? You can always lower it down a bit, so the boiler is not firing as much until it gets colder.
WNY
 
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Re: Boiler timer settings

PostBy: plumber On: Thu Oct 20, 2011 7:24 pm

WNY wrote:Whats your aquastat set at? 180? You can always lower it down a bit, so the boiler is not firing as much until it gets colder.


High limit 170
Low limit 150/10 diff

Ive got a constant draft of .04

And my dump zone is set for 195/15 diff
plumber
 
Stoker Coal Boiler: EFM 350

Re: Boiler timer settings

PostBy: jpen1 On: Thu Oct 20, 2011 9:58 pm

Plumber your dumpzone aquastat is set to low . Should be set to 205 or 210. You need to at least cut the idle feed back more. You either have to shorten the amount of on time or lengthen the off time or cut back on the feed rheostat some. I run mine different than eveyone else as mine the comb. fan runs all the time. When it is running at high fire fan is on 100%, when idleing the fan runs with the rheostat set at minimum. So I have a totally different setup, however I have my stoker run run for 54 seconds and off for 5 minuts.
jpen1
 
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: 110 Boiler

Re: Boiler timer settings

PostBy: plumber On: Fri Oct 21, 2011 6:35 pm

My new settings:
High limit 165 (actually what my house needs)
Low limit 140/20 differential
Dump zone 200 (all the way up)
Timer 2 on 15 off
Fan about 3/4 feed about 2/3

What should I be looking for? Where should I go from here?

Thanks
plumber
 
Stoker Coal Boiler: EFM 350

Re: Boiler timer settings

PostBy: plumber On: Sun Oct 23, 2011 7:53 pm

I guess I should add that my feed screw is in 12 1/2

Is there a fine line between having an outfire and regularly over temping the boiler, or is climbing temps just the nature of the beast?
plumber
 
Stoker Coal Boiler: EFM 350

Re: Boiler timer settings

PostBy: kstills On: Sun Oct 23, 2011 9:01 pm

plumber wrote:I guess I should add that my feed screw is in 12 1/2

Is there a fine line between having an outfire and regularly over temping the boiler, or is climbing temps just the nature of the beast?



Hate to say it, but I'm looking forward to colder weather, cause that should make this a non issue.

Did resetting your hi limit and all make a difference, or is the DZ still coming on?
kstills
 
Stoker Coal Boiler: WL 110
Stove/Furnace Make: Leisure Line

Re: Boiler timer settings

PostBy: plumber On: Sun Oct 23, 2011 9:09 pm

That makes two of us. I think stretching out the timer and turning down the rheostats made the bigger difference. My dump zone only trips once a day or so, usually over night when all my domestic water is satisfied and there is no load on the boiler. I must say, at this point it's all wild ass guess work.
plumber
 
Stoker Coal Boiler: EFM 350

Re: Boiler timer settings

PostBy: kstills On: Sun Oct 23, 2011 9:41 pm

plumber wrote:That makes two of us. I think stretching out the timer and turning down the rheostats made the bigger difference. My dump zone only trips once a day or so, usually over night when all my domestic water is satisfied and there is no load on the boiler. I must say, at this point it's all wild ass guess work.


Mine seems to be holding pretty steady around 160-165 atm.

I turned my 6006A up to 160, which since I'm running about 15 degrees off to the 7224, should trip at 175-180 or so.

I have to get that to stop tripping, because I drop all the way to 87 degrees by the time the DZ turns off. Then I use a bunch of coal bringing the boiler back up to 130 again.
kstills
 
Stoker Coal Boiler: WL 110
Stove/Furnace Make: Leisure Line

Re: Boiler timer settings

PostBy: plumber On: Sun Oct 23, 2011 9:48 pm

The two controls are completely independent of each other. Turn the 6006 up to 200/15 ( big wheel at 200 small white wheel at 15) that will have your dump zone trip at 200 and turn everything back on at 185.
plumber
 
Stoker Coal Boiler: EFM 350

Re: Boiler timer settings

PostBy: kstills On: Sun Oct 23, 2011 9:55 pm

plumber wrote:The two controls are completely independent of each other. Turn the 6006 up to 200/15 ( big wheel at 200 small white wheel at 15) that will have your dump zone trip at 200 and turn everything back on at 185.



What I meant was that the 6006A is tripping about 15 degrees F lower than where the 7224 is reading. I had it set at 145f, and it was tripping at 160-165. Something in my plumbing isn't letting the well give me a good temperature reading, and I think it's the way I have the fresh water feed and Ex Tank plumbed. Both go into the left hand nipple where the 6006A is located, which is what the Axe manual called for, but when the DZ comes on, the line from the Ex Tank stays hot a long time.....which I think is why the DZ doesn't turn off until way after the boiler has cooled down.

Funny thing is the Ex tank is stone cold, I don't know where the increase in the temp in that line is coming from.
kstills
 
Stoker Coal Boiler: WL 110
Stove/Furnace Make: Leisure Line

Re: Boiler timer settings

PostBy: jpen1 On: Mon Oct 24, 2011 8:45 pm

After the initial temp surge following a heat cyle you shouldn't have any temp gain if you have the timer set up properly. I lose about 1 * per hour when on standby. If your still gaining when on standby adjust the timer or take some more off the rheostat for the feeder
jpen1
 
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: 110 Boiler

Re: Boiler timer settings

PostBy: kstills On: Wed Oct 26, 2011 8:20 am

jpen1 wrote:After the initial temp surge following a heat cyle you shouldn't have any temp gain if you have the timer set up properly. I lose about 1 * per hour when on standby. If your still gaining when on standby adjust the timer or take some more off the rheostat for the feeder



Ok, that's Sunday's project.

I had to re-plumb everything yesterday, so I'm back up and running. Now I need a few hours un-interrupted so that I can calibrate the idle time controls.
kstills
 
Stoker Coal Boiler: WL 110
Stove/Furnace Make: Leisure Line

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