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wrxz24

wrxz24

Joined on October 29, 2011

Last Post on April 28, 2014

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Is there a way to check

@ April 28, 2014 5:05 PM in Failed ignition on triangle tube pt 110

And see if my boiler had one of the bad ignitors? So far so good the last 24hrs, no failed ignitions.

The sound I am hearing

@ April 28, 2014 5:14 AM in Failed ignition on triangle tube pt 110

Is after the boiler has been running. I will try to pinpoint when the sound is made. If i had to guess, 10 seconds after the boiler fires and the sound comes from the bottom of the cabinet.

I have the trimax installed

@ April 27, 2014 7:05 AM in Failed ignition on triangle tube pt 110

In May of 2013. It has worked great up until 800 hrs ago when it first failed to light. Now it has happened 2 more times yesterday.
One thing I have noticed that I can hear a knocking/thud sound soon after it lights sometimes.

Failed ignition on triangle tube pt 110

@ April 26, 2014 7:36 AM in Failed ignition on triangle tube pt 110

In the last 800hrs, I have gotten 4 failed ignitions. It happens when there is a dhw priority call. Not sure what the issue is. The boiler fires after pushing the reset button.

I am trying to do the same thing

@ March 5, 2014 8:31 PM in TT PE110 longer run times

but not only are you tweaking outdoor reset but you also have to factor in the boiler pump vs system pumps for my system at least.  So even if your tstat is still calling, you may reach set point quickly.
If all of my zones are calling, the boiler is fine but if one tstat gets satisfied, the burner can not modulate down fast enough and hits its setpoint and shuts down. 
I also have pulse width modulating tstat for my radiant heated slabs that also can affect burn times, the closer to the setting, the shorter the burn times like 10-12 minutes.
How long are your burn times and how much delay are you running for your burner?

I saw that when I was

@ March 5, 2014 7:43 PM in Fuel use question?

doing some research with my useage.  10 gallons a day seems like a lot but when I have to heat 3400 sq/ft, it isn't that bad.  

I forgot to add that

@ March 5, 2014 7:41 PM in Fuel use question?

the 10.3 gallons a day figure also includes cooking stove and dryer so I am not doing too shabby.
I still need to dial in the boiler though.  I am having a bout 20 ignitions a day and that includes a 30 minute burner delay.  I sort of wish I had all zones into one with constant circulation.

that sounds better

@ March 5, 2014 11:18 AM in Fuel use question?

How did you get to that number?

Fuel use question?

@ March 5, 2014 11:04 AM in Fuel use question?

Looking at the following numbers, just curious if there is something I should do to improve my system for next year. Triangle Tube 110 propane.  Radiant slab and baseboard mix and 50 gallon indirect HW.  Design temp -9, outdoor reset. Heat loss 90k.

From Feb 3rd to March 5th, 31 days I used 322 gallons to heat my 3,400sq/ft home.
1400 degree days  
During that time, the boiler ran for both heat and hot water priority for 400 hrs(330 for heat, 70 for hw) or about 13hrs a day.
So as I was burning about 10 gallons a day, the boiler was running about 13 hrs a day. 
so 10.3 gallons x 91,500= 942,450/31=/ 24= 30,401 btu/hr/3400sq/ft=8.9 btu/hr per sqft
Does this sound correct?
On the other hand the boiler was burning 10 gallons a day running for an average of 13hrs.  If it (87k for lp) ran full tilt at 95%, it would burn 82,650 btu/hr.  x 11hrs( just for Heat) = 909,150= 37,881btu/hr/ 3400sqft= 11.1 btu/hr/sqft.  T
So in the end, I heated my house this month on 8.9btu a square foot and if the boiler had run at 100% it would have heated my home at 11.1 btu a square foot.  So is it safe to say, the boiler did its job and modulated? 

The drawback

@ February 24, 2014 2:48 PM in The best Delta T for a mod-con?

For me was the boiler not modulating its fire. A wide delta t forces the boiler to high fire for my set up due to the mixed high temp and low temp water return. If the target is lets say 150 and i have 130 coming back from my baseboard zone but only 90 degree water from my 3 slab zones, the mixed temp of all returning water forces the boiler to high fire. Condensing will always happen if all my zones are calling.

For my set up

@ February 22, 2014 7:14 AM in The best Delta T for a mod-con?

I have been trying to see what speed I should set my boiler pump to. I have a tt 110 piped pri/sec. I find that the more flow I can get through the hx, the firing rate modulates better with a smaller delta t. My system delta t for all of my pumped zones are in the 20 range.

In the beginning, I thought that setting the 15-58 to speed one was going to get the best results and wide delta t, i found the boiler would high fire and hit set point and shut down. As soon as I switched to speed 3, the boilers firing rate would reduce due to a smaller delta t.

With my system, bb and high mass radiant, my mixed returns are more than a 20 degree delta t. So with the boiler pump on speed 1, the boiler spent most of the time on high fire due to the high delta t.

The problem I am having is with my tstat and outdoor reset working against eachother. I am starting to not like the tekmar 519 with pulse width modulation. The boiler is humming along and the tstat shuts it down. I wonder If I should scratch this tstat and go constant circulation?

So far i changed the pump and

@ February 2, 2014 4:48 PM in Superstor contender piping ?

My first observation is that when I went out to check the temp of the tank, it read 142. It has never been that high before. It is set for 138. Not sure if that is the result of the garage being warmer due to warmer weather or the pump.

I did not get a chance to see how it recovers yet as I had to leave the house today after taking a shower.

The pump 15/58 is on speed 3. Will keep observing.

The sensor is about 12 inches above the bottom of the tank

@ January 25, 2014 8:33 AM in Superstor contender piping ?

In the same location as the thermostat was originally. They used foil tape and then spray foam. However there was a 3x3 section that did not have spray so the tank was exposed to the air near an outside wall. Above the spray foam, there was another small section exposed. Not sure how much of an affect that would have on heat loss.
The boiler ran an additional 2 hrs last night while we were sleeping so the tank dropped 8 degrees at least one time or maybe 2 or more....not sure. Could it be due to that small section of tank without insulation. I packed it full of aluminum foil insulation board and screwed the cover back on.

I will let you guys know

@ January 24, 2014 9:02 PM in Superstor contender piping ?

When i change out the pump and see if that makes a difference then i will change the piping to 1".

Unfortunately

@ January 24, 2014 8:52 PM in Superstor contender piping ?

I am not in the southern hemisphere :)

i will do it ziggys way :)

@ January 24, 2014 7:07 PM in Superstor contender piping ?

The sensor enters through the opening where the old indirect thermostat went.  So I assume it is near the bottom of the tank.

I watched the boiler tonight to see how long it took the indirect to go up 2 degrees.  From 132 -134 took about 5 minutes or so and had 190 deg water going to and 168 coming back.  The DHW ran 2 hrs today from 5 this morning until 4:30 this afternoon.  2 showers. 

What do you recommend for a differential setting?

I just ordered all the stuff to make it 1 inch and the 15-58 pump.  So I will update you guys when I get er' done.  I may swap out the pump first to see if that improves things for the time being. 

The indirect is about 5 feet from the boiler

@ January 24, 2014 5:03 PM in Superstor contender piping ?

so there is  not a long run.  There are a few 90's on both supply and return piping so that will add to the resistance.  I am still confused about how to pipe it. One manual says to pipe the supply from the boiler to the higher tapping of the coil with the circulator.  Another manual says to put the circulator on the return.

There is about 20 feet of pipe for the hot water to travel before getting into the 68deg heated house.  I will insulate the pipes at the same time.

Run time for dhw since May is

@ January 24, 2014 1:29 PM in Superstor contender piping ?

780 hrs. 7000 plus ignitions. I have to try with new pump and piping. Will let ypu guys know after completed.

Thanks for all the help and ideas.

Pete

The hot water pipe was warm about 2 feet up

@ January 23, 2014 9:11 PM in Superstor contender piping ?

And the cold fill pipe was luke warm about 2-3 feet up. Temp of tank was 134 and calling. The indirect has run 4 hrs total the last 30 hrs.....

It is a fairly new house 2005

@ January 23, 2014 5:15 PM in Superstor contender piping ?

So not sure about the shower valves. I will certainly check on the possibility of gravity circulation.

Not sure what you mean by

@ January 23, 2014 2:28 PM in Superstor contender piping ?

Closing off the cold water valve. Too see if there is aleak somewhere?

I have it piped

@ January 23, 2014 12:15 PM in Superstor contender piping ?

But not hooked up. The indirect is in the garage kept at 50 degrees. No basement.
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