Mind Boggling EFM 520

 
User avatar
blrman07
Member
Posts: 2383
Joined: Mon. Sep. 27, 2010 3:39 pm
Location: Tupelo Mississippi

Post by blrman07 » Tue. Feb. 16, 2016 6:57 am

Uhh Yep we need the photo's to see what you have and what it's set at and where it's set.


 
bobok
Member
Posts: 105
Joined: Mon. Jan. 13, 2014 10:03 pm
Location: Richfiled Springs, ny
Stoker Coal Boiler: efm700 stoker, Pacific 350K boiler
Hand Fed Coal Boiler: D&S Machine hand fed
Coal Size/Type: stove / buck
Other Heating: Bethleham Dynatherm Oil boiler

Post by bobok » Tue. Feb. 16, 2016 7:20 am

One of the big advantages of the triple aquastat besides replacing two seperate aquastats, is that when there is a call for heat, it starts the burner/stoker, rather than waiting for the boiler temp to drop. The other seperate controls can stil be used for dump loops etc. The newer triples can also vary temps according to outside temps and also offer low water cutoff options. Bobo K. ;)

 
lzaharis
Member
Posts: 2365
Joined: Sun. Mar. 25, 2007 8:41 pm
Location: Ithaca, New York
Stoker Coal Boiler: Keystoker KAA-4-1 dual fuel boiler
Hand Fed Coal Boiler: former switzer CWW100-sold
Coal Size/Type: rice
Other Heating: kerosene for dual fuel Keystoker/unused

Post by lzaharis » Tue. Feb. 16, 2016 1:00 pm

I am wondering if the new triple aquastat is connected to the L6006A correctly?

The electrician has my 6006A wired in parallel with the
triple aquastat TT terminals and I have had no issues with the KAA-4-1
since the electrician found the problem and I have a warm home
after all the problems that occurred previously.

 
User avatar
McGiever
Member
Posts: 10130
Joined: Sun. May. 02, 2010 11:26 pm
Location: Junction of PA-OH-WV
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hand Fed Coal Boiler: BUCKET A DAY water heater
Hand Fed Coal Stove: Warm Morning 414A
Coal Size/Type: PEA,NUT,STOVE /ANTHRACITE
Other Heating: Ground Source Heat Pump and some Solar

Post by McGiever » Tue. Feb. 16, 2016 9:28 pm

lzaharis wrote:I am wondering if the new triple aquastat is connected to the L6006A correctly?
You may as well wonder if the white wheel is set to correct setting too. ;)

Since it is wired as a "dump" you will never know until L6006 gets triggered. :o

Now if'n it were me, I'd force it to "dump" by lowering the wheel to a setting less than the at the time vessel water temp and witness for myself that it in fact will/does work as designed/expected. :roll:

 
User avatar
blrman07
Member
Posts: 2383
Joined: Mon. Sep. 27, 2010 3:39 pm
Location: Tupelo Mississippi

Post by blrman07 » Wed. Feb. 17, 2016 5:37 am

Do we know yet if the l6006a is the only controller on this boiler?

 
User avatar
McGiever
Member
Posts: 10130
Joined: Sun. May. 02, 2010 11:26 pm
Location: Junction of PA-OH-WV
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hand Fed Coal Boiler: BUCKET A DAY water heater
Hand Fed Coal Stove: Warm Morning 414A
Coal Size/Type: PEA,NUT,STOVE /ANTHRACITE
Other Heating: Ground Source Heat Pump and some Solar

Post by McGiever » Wed. Feb. 17, 2016 10:02 am

blrman07 wrote:Do we know yet if the l6006a is the only controller on this boiler?
Good point, Larry. :)

Not sure we do know what's on his EFM 520 other than the mentioned L6006. :?: :?: :?:

 
User avatar
StokerDon
Site Moderator
Posts: 7486
Joined: Mon. Nov. 11, 2013 11:17 am
Location: PA, Southern York County!
Stoker Coal Boiler: Gentleman Janitor GJ-5, Van Wert VA-600, Axeman Anderson130 X3.
Hand Fed Coal Furnace: Harman SF3500 reduced down to 3 grates connected to its own plenum
Coal Size/Type: Rice, Chestnut and whatever will fit through the door on the Harman
Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood

Post by StokerDon » Wed. Feb. 17, 2016 7:32 pm

blrman07 wrote:Do we know yet if the l6006a is the only controller on this boiler?
It would be nice if there was a triple aquastat hiding on the back of the boiler by the DHW coil and it was just set wrong.

-Don


 
tnf75
Member
Posts: 21
Joined: Sat. Aug. 16, 2014 12:09 pm
Location: Upstate NY
Stoker Coal Boiler: EMF 520
Coal Size/Type: Rice

Post by tnf75 » Fri. Feb. 19, 2016 3:18 pm

Sorry for the delay in getting back to forum ~ Its a single aquastat ~ plugged into switch ~ switch into timer

Attachments


 
User avatar
blrman07
Member
Posts: 2383
Joined: Mon. Sep. 27, 2010 3:39 pm
Location: Tupelo Mississippi

Post by blrman07 » Fri. Feb. 19, 2016 3:31 pm

This is exactly what I was afraid of. A single l6006a running the entire shebang. Ok where to start..... except for when the weather gets warm, buy by and install a triple aquastat to control this boiler and pump and turn that 6006 into scrap.

Your life will uncomplicate like you won't believe.

 
tnf75
Member
Posts: 21
Joined: Sat. Aug. 16, 2014 12:09 pm
Location: Upstate NY
Stoker Coal Boiler: EMF 520
Coal Size/Type: Rice

Post by tnf75 » Fri. Feb. 19, 2016 5:19 pm

What is the model number for a triple aquastat for my EFM??

 
tnf75
Member
Posts: 21
Joined: Sat. Aug. 16, 2014 12:09 pm
Location: Upstate NY
Stoker Coal Boiler: EMF 520
Coal Size/Type: Rice

Post by tnf75 » Fri. Feb. 19, 2016 5:30 pm

http://www.supplyhouse.com/Honeywell-L7224U1002-120-Vac-Oil-Electronic-Aquastat?gclid=CI6Ek-_vhMsCFYSDaQodBvQOsg

Not sure ~ it this my replacement? IF not can u link right one to me? Thank You!

 
User avatar
coal stoker
Member
Posts: 355
Joined: Tue. Feb. 17, 2015 5:07 pm
Stoker Coal Boiler: 1986 EFM DF520
Coal Size/Type: Rice/Anthracite
Other Heating: oil fired boiler

Post by coal stoker » Fri. Feb. 19, 2016 5:55 pm

I have this model on my 520, it works very well and has an energy saving feature that performs well.
http://www.supplyhouse.com/Hydrolevel-48-3250-Model-3250-Fue ... il-Boilers
Best of luck
CS

 
User avatar
StokerDon
Site Moderator
Posts: 7486
Joined: Mon. Nov. 11, 2013 11:17 am
Location: PA, Southern York County!
Stoker Coal Boiler: Gentleman Janitor GJ-5, Van Wert VA-600, Axeman Anderson130 X3.
Hand Fed Coal Furnace: Harman SF3500 reduced down to 3 grates connected to its own plenum
Coal Size/Type: Rice, Chestnut and whatever will fit through the door on the Harman
Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood

Post by StokerDon » Fri. Feb. 19, 2016 6:14 pm

That's not even the right place to put the aquastat. The aquastat should be mounted down near the bottom of the steam chest. This will give the aquastat a reading on the colder parts of the boiler and therefore better control.

EFM's normally have the aquastat in the back next to the DHW coil. Please take a look back there to be sure one isn't hiding there.

-Don

 
User avatar
Rob R.
Site Moderator
Posts: 17977
Joined: Fri. Dec. 28, 2007 4:26 pm
Location: Chazy, NY
Stoker Coal Boiler: EFM 520
Hand Fed Coal Stove: Chubby Jr

Post by Rob R. » Fri. Feb. 19, 2016 6:33 pm

Time for my $0.02.

1. Even if you did not replace the aquastat, you would get better results if it was located in the back of the boiler in the factory location. Most of the 520's I have seen have a 3/4" tapping next to the tankless coil, like this:
photo8.JPG
.JPG | 115.6KB | photo8.JPG
The aquastat will react quicker to a drop in temperature from the return water in that location.

2. You can control the boiler temperature with a single-acting aquastat, but the problem is that it doesn't have the ability to limit the boiler temperature AND provide protection from the timer malfunctioning. You either have to accept that the timer won't function correctly if you pass it through the aquastat, or you bypass the aquastat and hope that the relief valve will do its job if the timer sticks on. Neither situation is ideal.

3. Are your circulators powered via those cube relays in the last picture?

You can install a new L4006A or L6006A aquastat in the factory location and use it to control the boiler temperature - and use your current aquastat for high limit protection...or you can install a triple aquastat in the factory location, and hook up the timer the way EFM recommends. You may be able to hook it up to your relays so it knows when a zone calls for heat, or not. It depends.

 
User avatar
Scottscoaled
Member
Posts: 2812
Joined: Tue. Jan. 08, 2008 9:51 pm
Location: Malta N.Y.
Stoker Coal Boiler: EFM 520, 700, Van Wert 800 GJ 61,53
Baseburners & Antiques: Magic Stewart 16, times 2!
Coal Size/Type: Lots of buck
Other Heating: Slant Fin electric boiler backup

Post by Scottscoaled » Fri. Feb. 19, 2016 6:47 pm

Wow! Excellent installation! Who set that up for you? I'd go with the 3250 but you would also need the remote kit. It works so much better with the Aquastat on the wall.


Post Reply

Return to “Stoker Coal Boilers Using Anthracite (Hydronic & Steam)”