Primary Boiler Circulator Question

Primary Boiler Circulator Question

PostBy: Kungur On: Sat Feb 25, 2012 3:38 pm

I have my radiant floor set up with a KA-2. I have a Primary loop and 3 zones off the Primary controlled by sepeate circulators. I have Tekmar 3 way valve to be able to supply the zones with apprx. 130F water temp.
Recently I noticed that while a zone is calling for heat and that circulator is running the supply temp if good. Then while being down by the boiler last eek I notice that while the zone circulator was running the Primary circulator came on and the water temp climbed about 15 degrees. The it fell back as soon as the Primary shut off.
The house is comfy and this is season #2.
I checked how the Primary is wired and it is as instructed.
So what's up?
Also,I probably should know, what is the criteriea for the Primary to turn on?
Thanks!!
Kungur
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: K-2

Re: Primary Boiler Circulator Question

PostBy: Rob R. On: Sat Feb 25, 2012 4:07 pm

What is controlling the primary circulator? If it is the triple aquastat, the circulator won't run if the low limit is reached. Perhaps one of your radiant zones dropped the boiler temperature enough that the aquastat shutoff the circulator until the boiler recovered.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Primary Boiler Circulator Question

PostBy: Kungur On: Sat Feb 25, 2012 4:33 pm

Yes, the Primary is controlled by the Triple Aquastat.
Kungur
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: K-2


Re: Primary Boiler Circulator Question

PostBy: Rob R. On: Sat Feb 25, 2012 4:42 pm

What settings are you using on that aquastat? Do you use the tankless coil?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Primary Boiler Circulator Question

PostBy: Kungur On: Sat Feb 25, 2012 6:00 pm

Just saw your post. I will check later as I am on my way out.
Yes, I do use the coil.
Kungur
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: K-2

Re: Primary Boiler Circulator Question

PostBy: Kungur On: Sat Feb 25, 2012 10:18 pm

Rob,
Here are my settings on the Triple Aquastat
150F Lo
160F Hi
15 degree Diff
Kungur
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: K-2

Re: Primary Boiler Circulator Question

PostBy: Rob R. On: Sat Feb 25, 2012 10:34 pm

You should keep at least a 20 degree spread between the high and low limit settings. Try 150/180/10 and see how it runs.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Primary Boiler Circulator Question

PostBy: Kungur On: Sun Feb 26, 2012 8:55 am

Thanks Rob.
I will give it a try. I cannot remember how or why I came up with those settings.
Kungur
 
Stove/Furnace Make: Keystoker
Stove/Furnace Model: K-2

Re: Primary Boiler Circulator Question

PostBy: oliver power On: Sun Mar 11, 2012 6:50 am

Rob R. wrote:What is controlling the primary circulator? If it is the triple aquastat, the circulator won't run if the low limit is reached. Perhaps one of your radiant zones dropped the boiler temperature enough that the aquastat shutoff the circulator until the boiler recovered.

Yes Rob R., My Kaa-2 works as you describe.
oliver power
 
Stoker Coal Boiler: KEYSTOKER Kaa-2
Hand Fed Coal Stove: Hitzer 50-93 & 30-95, Vigilant (pre-Vigilant-II)
Baseburners & Antiques: MANY (Mostly when burning wood)
Stove/Furnace Make: HITZER / KEYSTOKER
Stove/Furnace Model: 50-93 & 30-95 , Kaa-2