Need new timer for efm 520

Need new timer for efm 520

PostBy: mooseman100 On: Tue Oct 30, 2012 9:58 am

Hello all, hope everyBody road thru the storm ok. Here in winchester, va we are in pretty good shape. Big heavy snow last oct and strong wind this june cleaned out alot of dead trees.
I have a efm 520 that is awesome, but my timer and aquastat are very old. I cannot read numbers on my timer dial and it does not adjust very easily. It is a will-burt, i think #20320, not exactly sure of number.
My question is two fold.
1) will-burt wants 3 weeks and $340.00 to replace this one. Is there a different timer that can be installed for less money.

2) is there and all in one aqustat and timer built together. The aquastat worked all last year, the numbers on the temp guage are not real close to the actual temp of the water, but i have managed to figure out some sense of madness with it. So i am not opposed to switching it out either, maybe something digital.

Thanks for your help.

Stove/Furnace Model: EFM 520

Re: Need new timer for efm 520

PostBy: Rob R. On: Tue Oct 30, 2012 1:42 pm

Even if you can't read any of the numbers, if the boiler doesn't go out, doesn't overheat, and heats the might not be prudent to mess with it at the start of the heating season. With that said, here is the info you asked for.

mooseman100 wrote:1) will-burt wants 3 weeks and $340.00 to replace this one. Is there a different timer that can be installed for less money.

Yes. Intermatic units are available for about $100. They may not be of the same built quality, but they seem to be good enough for most people. Model C8835 is a 30 minute timer, C8865 is a one-hour timer. Sometimes used ones or "new old stock" comes up on ebay. Tork also makes some timers that will work, but I don't know the model numbers off-hand.

Another option is to build your own timer. Forum member "Vermontday" uses a device called a LOGO, and you can read about it here: EFM 520 Install with skid/bulk bags feed

If using a laptop to program your timer isn't your style, you could also build a mechanical timer using a plain electrical enclosure and repeat-cycle relay...the nice part of this one is you can get a relay with an adjustable (adjustable by a knob, not a laptop ;) )cycle length. If you want to run 2 minutes every 45, that is possible.

mooseman100 wrote:2) is there and all in one aqustat and timer built together.

Not that I'm aware of. Honeywell and Hydrostat both make triple aquastats with a digital readout, but the Hydrostat is my favorite (easier to adjust, and it can function as a low-water cutoff).
Rob R.
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: Need new timer for efm 520

PostBy: McGiever On: Tue Oct 30, 2012 7:08 pm

About that LOGO! controller, no laptop is needed to make adjustments.

Settings are changed by buttons on the face of the controller, same as on a digital thermostat. :)
Only the software program needs to be loaded initially one time by a laptop/pc.

Member *vermontday* gladly loaded his Logo! programming on my Logo! that I sent to him. :D
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Coal Size/Type: PEA / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: Need new timer for efm 520

PostBy: grobinson2 On: Thu Nov 01, 2012 12:34 am

I have a like new Will-Burt that I will sell you if interested.

Stoker Coal Boiler: EFM 520 Highboy, and EFM 520 round door
Hand Fed Coal Stove: Coalbrookdale Darby, Harman Mark III, Stratford SC100, DutchWest 288 (With Coal Insert), Coalbrookdale Severn, Hitzer 50/93, Hitzer 354 Double Door, FrancoBelge La Normandie, DS Machine Anthramax
Coal Size/Type: Rice, Buck, Pea, Nut, and Stove
Other Heating: Vermont Castings Defiant 1975 FlexBurn, Fisher Grandpa Bear, Vermont Castings DutchWest 224, Vermont Castings Defiant 1945