My DF520 is up and running (new install)

Re: My DF520 is up and running (new install)

PostBy: GoodProphets On: Tue Oct 16, 2012 8:09 am

Yes the pressure relief is about 30-32 as I witnessed it let out alot the first night it was fired up.

I have seen it go under 20 psi, but that was sitting idle for 12+ hours and yesterday I had an outfire.

First time starting myself was not fun haha.

But after finally realizing I had a torch, it still took a while until I realized that I needed to give it a good
5 min or so of torch and then air for a while, and then toss on a bit of coal a few times until it was glowing good.

Next time to light, I will have it down pat.
Should only take 10 min of my time.
GoodProphets
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Anthra Rice
Other Heating: 3 Fireplaces

Re: My DF520 is up and running (new install)

PostBy: Mark (PA) On: Tue Oct 16, 2012 8:45 am

I think when your Installer comes back he needs to tell you why you have a 20 PSI fill valve.

your pressures are running much higher than should be needed.

If you need to be running that high of a pressure your system needs looked at for Air and pump issues also.
Mark (PA)
 
Stove/Furnace Make: 1953 EFM SF-520 High Boy
Stove/Furnace Model: Fitzgibbon Boiler

Re: My DF520 is up and running (new install)

PostBy: daluds On: Wed Oct 17, 2012 11:44 pm

Good - Starting the DF520 is simple. Turn the boiler off. Take 6 briquets of Kingsford charcoal, and wrap in paper or paper towels. Use a hammer or other mallet and break them up into bits. Empty the pot of burnt coal. Then turn the worm until some coal is in the bottom of the pot. Then put the wade of briquets in the pot. Put kerosene or lighter fluid on the wad, and then light it. Shut the door and turn on the boiler. Turn on call for heat. It should run and the coal will start burning over time. The DF520 becomes a hobby over time. :-)
daluds
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520

Re: My DF520 is up and running (new install)

PostBy: GoodProphets On: Thu Oct 18, 2012 2:47 pm

Well, they came back today and I will say much better, much better.

I think it was a simple putting too much water in the system that did it, and they just left before
fully checking it hot etc.

Took out pressure and brought it to 15, and he adjusted the auto fill valve
And we also got a tempering valve on this one... http://www.watts.com/pages/_products_de ... sp?pid=717

So we are in the 14-17 psi range now!!!

I think it might be a cheapy one, but as long as it works and limits the temp we are good.
I will just have to adjust it if I adjust the boiler temps.

The damper was fixed, and the leak was fixed. We kinda determined the big old leak might have
been from a pipe overhead, that leaked in the past.

SO everything is good except they (both installer and owner) said that over 170 high, would be too hot.
Hot for kids etc.
I am still a little unsure on that.

Running on the higher 200 high setting with 40 gap, this would also increase efficiency? Is that right?
I just have some thoughts now, but once we get could outside I will see some of them thoughts either be wrong or right.
GoodProphets
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Anthra Rice
Other Heating: 3 Fireplaces

Re: My DF520 is up and running (new install)

PostBy: Mark (PA) On: Thu Oct 18, 2012 5:50 pm

I am not about to discount anyones opinions on the 200 degree setting.

I will only say that I myself agree with your installer. it is not necessary.

I run 130 to 175 year around.

If your unit is faced with typical demands there is no reason to ramp up heat to 200... Maybe on the coldest days of winter this would bring some effeciency but I really can't quantify that.

I also run Radiant zones that do not like water over 130 anyway so my mixing valve is not trying to temper 200 water unnecessarily either.

SHrug. i'm sure others have their own thoughts but I've been running mine onto 6 years now and never once had an issue with this range for demand. Also live in an OLD farmhouse with very little insulation. Keep stats 71 or 72.
Mark (PA)
 
Stove/Furnace Make: 1953 EFM SF-520 High Boy
Stove/Furnace Model: Fitzgibbon Boiler

Re: My DF520 is up and running (new install)

PostBy: GoodProphets On: Thu Oct 18, 2012 8:35 pm

Now running that low (so to speak) the boiler would just have to run longer and circ pumps would cycle more times until room
tstat is up to temp? right?

I was just concerned that when my tstat calls for heat, the circ pumps come on right away (since it is in the range)
and then it drops to under 150 cuts off the circ pumps gets back up to 150 circ pumps are back on....and so forth.

I timed this twice I think and just to satisfy 2 degrees on one zone (without it being cold or windy out YET) it
takes between 1 1/2 to 2 hours for that 2 degree to satisfy.

If I pump up the feed and air, that would be the same or similar to running hotter boiler temps to a point?
But only to the point until the demand is much greater, and then feed and air would be necessary.

Before I do any adjusting of the temps, I am going to see how the boiler works on my system.
I want to see cold weather and tstats calling for heat throughout the day and night.
If it cant keep up, I will adjust feed and air.
And If the efficiency is not seeming right, I think that is where the boiler temps will have to be adjusted.

Am I sorta on the right track?
GoodProphets
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Anthra Rice
Other Heating: 3 Fireplaces

Re: My DF520 is up and running (new install)

PostBy: JeepinPete On: Fri Oct 19, 2012 11:49 am

I feel this is a "many ways to skin a cat" situation. You can run the temps high and in turn shorten the cycle times of the circulator. Or you can run the temps lower and lengthen the circulator times. I went with the second approach, logic being two fold. The longer run time allow the stoker to get a good burn time. Second, the rooms seems to stay at a more constant temp. I also have no resrvations about raising the set points on the aquastat as the winter gets cold. After all, I am going to be tending the boiler every day or two anyway.
JeepinPete
 
Stoker Coal Boiler: EFM
Coal Size/Type: Rice
Stove/Furnace Make: EFM
Stove/Furnace Model: Highboy

Re: My DF520 is up and running (new install)

PostBy: GoodProphets On: Fri Oct 19, 2012 12:37 pm

Thanks for the replies.
Very much help in understanding everything now that i am running.
Satisfies my thoughts!

The future will hold the key to prosperity on the boiler. :D

Now I just need to study my upgrades.

I need a manometer and also gotta get the damper set up. I am sure it needs an adjustment.

I think I am at the 25-35 # a day range right now, but I have just started keeping record the last day, so it is not accurate.
GoodProphets
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Anthra Rice
Other Heating: 3 Fireplaces

Re: My DF520 is up and running (new install)

PostBy: Coal Guzzler On: Tue Oct 30, 2012 7:27 pm

The bypass valve helps to reduce stratification of the water in the boiler when using only the domestic coil.

The heat cycle will always be more efficient with lower temperatures. Heating the house will be faster with higher temperatures. It's a balancing act or a give and take. When it's very cold outside you may want to bump up the low setting for faster heating of the house. In the summer you may want to bump the low setting down for better efficiency and for a greater different to the high setting and therefore reduce the risk of an out fire. I set my low at 140 in the summer and never run out hot water. In the winter I may increase it to 160 for better heating since the chance of an out fire is virtually nil. I keep my high at 200 and don't ever change it.
Coal Guzzler
 
Stove/Furnace Make: Saey Stove/EFM Boiler
Stove/Furnace Model: Hannover Stove/DF 520

Re: My DF520 is up and running (new install)

PostBy: Blackdiamonddoug On: Wed Oct 31, 2012 10:32 am

I have a simular radiator system
I have 4 exp tanks with isolation valves on each
So they can be changed with out system shut down
You will need higher temperature in winter to get enough heat this will cauae further expanion of water my fill valve is set to 9 psi system runs at 20 when hot
Blackdiamonddoug
 
Stove/Furnace Make: axemen 260 rebuilt by Matt
Stove/Furnace Model: stoker AA 260

Re: My DF520 is up and running (new install)

PostBy: GoodProphets On: Wed Oct 31, 2012 7:58 pm

I am at 150/170F for low and hiGH
I am thinking of bringing the high up to 180 or 190 to get closer to the 40 degree gap.

Now when it is running full, calling from both zones (whole system is hot and expanding) I am running over 25 psi
We drained some water as it used to go 30 and just over, but I think I want to drain more water to hi the low psi, which could help the high psi.

questions:

1. Would a steady 30psi (or around) be ok when fully stoking?
(Hoping that draining some water will fix it and I dont need a larger or second exp tank)

2. I think the taco's are rated from max of 250F, is there a t max for the 520?
Maybe I missed it. (just curious)

3. Is there any downside or negatives to two baro dampers?
I currently have the .02 at the door and .04-.05 in the flue about 6-8 inch away from stoker.
But I have the damper weight almost full tilt, and I am assuming once we get 20-30 degrees cooler outside, my draft will be higher, correct?
That would require a second baro. I have a chimney at least 30ft

I am still fiddling with my feed/air and currently set at 4/4.25 (previous 3/3.5-4 or so)
I noticed that I was running about 50 lb a day for the last 2 weeks, but since I bumped the feed up (to see if boiler can satisfy stats a touch quicker), I
noticed last night it ate up close to double...?
Should I run it a few days at 4/4.25 and measure consumption then back it down to 3/3.5 to calculate?
we really do not have any cold/hot/cold/hot in the house, so the longer to satisfy isnt a complaint.


Thanks
Rob
GoodProphets
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Anthra Rice
Other Heating: 3 Fireplaces

Re: My DF520 is up and running (new install)

PostBy: GoodProphets On: Wed Oct 31, 2012 8:00 pm

Ohh, and what is normal flue temps people have?

I have some temp probes coming any day now, so that is next on my list to see if I have correct set up.

I read a couple, but I guess depends on a few factors (chimney draft)


Sitting idle, the flue is warm, for the most part.
When stoking, I can only touch it, but if touched for even a half second, your burnt!
GoodProphets
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Anthra Rice
Other Heating: 3 Fireplaces

Re: My DF520 is up and running (new install)

PostBy: GoodProphets On: Sat Nov 10, 2012 2:17 pm

Just got the digital temp probes.

idle I am at 100-120 F

stoking I am at 440F range or less.

Right now i am at 3/3.25 burning about 100-125 lbs a day.
When the wind kicks a bit that can jump to 200 lbs a day.

I was at 4/4+ but I noticed a bit much of unburnt, so I wanted it to run a bit longer to satisfy.
I think I found a semi sweet spot for now, but I imagine I might have to turn up feed to 4 when it is bitter outside. (cut elec costs for running/stoking)

I am also going to look into possibly insulating my pipes. Starting with that and working from there.

I think by judging what the last month gave us, I am boosting my calculations to possibly 15 tons/yr with DHW consumption.
Heat in winter 12 tons w/ DHW for the 6 months +/-

So judging what numbers I have (which is a lil early in the game)

Not counting coal for DHW....cost will be approx 58% less than oil if I buy bulk ($219/ton) or 49% less if I buy bagged ($270/ton)
This would be tstats at 68-70F with coal and it WAS 62-64F with oil

Does EFM sell stock?
Or they have any dealer spots open????
GoodProphets
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Anthra Rice
Other Heating: 3 Fireplaces

Re: My DF520 is up and running (new install)

PostBy: Rob R. On: Sat Nov 10, 2012 2:26 pm

400+ degrees F seems high for a stack temperature with that feed rate. With 4/4.5 mine tops out around 375F. Maybe it is a difference in location? My probe goes about 2" into the pipe, about 1 foot from the boiler.

Also, at 3 teeth of feed you shouldn't be able to burn 200 lb per day. 7.5 lbs x 24 hrs = _____?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: My DF520 is up and running (new install)

PostBy: Pacowy On: Sat Nov 10, 2012 5:23 pm

The high stack temperature and sensitivity of consumption rate to wind makes me wonder whether the base has been fully sealed against unwanted air infiltration - e.g., ash and fire door gaskets, boiler head to base, base panels, bin feed pipe collar gasket, etc.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite