Installing the Large Front Door on an Old 520 Boiler

Stoker Coal Boilers automatically feed the coal and have controls and pumps just like any conventions boiler. They are intended to be used as a primary heat and often have domestic hot water coils as an added bonus. They can be set up independently or in dual sytem with your existing oil/gas boiler. They can accommodate both hot water base board or steam plumbing.
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Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Tue. Feb. 05, 2013 5:52 am

Has anybody done this and does the front sheet on the AP520 have enough area to install the larger DF door without getting near the water jacket? If so, the kit to change over is about $300-320 for everything and alot cheaper if you have a used door.

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glenn harris
Posts: 81
Joined: Fri. Nov. 21, 2008 7:01 am
Stove/Furnace Make: EFM
Stove/Furnace Model: 520
Location: Slate Belt

Post Tue. Feb. 05, 2013 5:18 pm

I know of a dealer that does it on the old round door plate boilers. (not me!)
Not sure about the front sheet fitting but I would imagine that it would.
You could even turn them into dual fuel units if you wanted.
Glenn Harris
Efm Authorized Dealer
(570) 688-7888
[email protected]

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