Rebuilding EFM DF-520 Project, Parts Only

gwjwbw · Post by **gwjwbw** » Thu. Feb. 10, 2011 2:30 pm

I made my shopping list today and sure it a long list.
Any of you guys that are EFM dealers, rep or sell these parts.
Please Pm for prices
To make sure of which boiler I have, here the number
DF-520
net rating 149000 btu
valve capacity 400 lb per hour
date of MFG 4-87
guess that it
Let me know if you need any more info

Burner worm bushing 9433986
groove pin 82808
gooseneck bushing
shear pin 35656
clutch shaft coupling 9433753
cotter pins 82711 (3 1/16x1 1/2
rope gasket 9435999 (in the gooseneck machining)
air chamber rope gasket 9435770
Damper plate 9431728
Damper plate retaining screw 81004
burner plate rope gasket 9435683
complet burner plate set 9436232K (need 6)
1/4x20x1 1/4 machin screws (6)
rope gasket for bin feed tube collar (underneather bin side plate)
burner worm 9441326
burner end pipe 9434748
7 gpm coil and gasket kit 9552312K

gwjwbw · Post by **gwjwbw** » Sat. Feb. 26, 2011 12:08 pm

looking for price on the controls now
L8124A Aquastat relay
L6006A Aquastat
Will-Burt Timer 20350
Thank, Gerard

AA130FIREMAN · Post by **AA130FIREMAN** » Sat. Feb. 26, 2011 12:13 pm

gwjwbw wrote:looking for price on the controls now
L8124A Aquastat relay
L6006A Aquastat
Will-Burt Timer 20350
Thank, Gerard

Take a look on ebay, some new some used. Online their is simplyplumbing.com and pexsupply.com. The home improvement box stores cary some aquastats also.

Post by **stoker-man** » Sat. Feb. 26, 2011 12:41 pm

Some of the aquastats are rebuilt, not new. Check the description carefully.

gwjwbw · Post by **gwjwbw** » Sun. Feb. 27, 2011 8:45 am

After checking out on ebay, I see some more number after the part number I want, now, what do I really want?
It like I need the 2nd part of the part number and I don't see that on EFM site.
Thank for your help
Gerard

gwjwbw · Post by **gwjwbw** » Fri. Mar. 04, 2011 6:15 pm

Honeywell L8124B1039

can I use this aquastat relay instead of L8124A?
Thank, Gerard

Post by **stoker-man** » Fri. Mar. 04, 2011 10:14 pm

No, it cannot be a B

Post by **stoker-man** » Sat. Mar. 05, 2011 6:59 am

It's possible you can't buy a new 8124A anymore. I think they stopped making them a couple years ago and the only ones for sale are those who stockpiled them or rebuilt them. They were replaced by the 7224A electronic aquastat.

We had alot of returns of the new aquastat compared to almost none of the old model. The even older 8124s with the red circuit board would last for decades. The newer green board 8124s would suffer from broken solder joints which some people would reheat and save the unit. Generally return rates were low.

I think there is a learning curve with the newer 7224s and dealers would just replace them because they didn't know how to use them, so maybe they don't deserve the bad rap. But finding a new 8124A is getting harder by the day. efm was still able to get them new and may have some in stock.

Fran654 · Post by **Fran654** » Sat. Mar. 05, 2011 8:14 am

hi ,gerard check your pm,

Post by **Rob R.** » Sat. Mar. 05, 2011 8:19 am

I installed a 7224A on my Dad's 520, it works excellent. If you are buying new, take a look at a Hydrostat 3150 combination low water cutoff & aquastat.

gwjwbw · Post by **gwjwbw** » Sat. Mar. 05, 2011 5:30 pm

here on ebay, I found this that replace the L8124A
This universal controller replaces: L8124A,C.,L8148A, L7124A,C,U., L7224A,C., and 7148A
Honeywell L7224 U1002 Oil Electronic Aquastat Controller 120 Vac with Enviracom/Leds

what you guys think?

cardinal · Post by **cardinal** » Sat. Sep. 03, 2011 10:41 pm

I found a guy from pottsville has three pots for 520, anyone in need let me know I have his phone number