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520 operating control

Posted: Tue. Mar. 13, 2018 8:25 pm
by franpipeman
Has the digital age created a replacement for the l8124a Honeywell Operating controller for a efm 520. Do folk use other controllers ?

Re: 520 operating control

Posted: Tue. Mar. 13, 2018 8:53 pm
by nepacoal
My kaa-4 came from the factory with a Hydrolevel 3250 plus digital triple aquastat. Has worked perfectly since day one and is very easy to set and adjust. It can also act as a LWCO when using an electrowell

Re: 520 operating control

Posted: Tue. Mar. 13, 2018 10:44 pm
by Scottscoaled
I also use the Hydolevel 3250.

Re: 520 operating control

Posted: Tue. Mar. 13, 2018 10:55 pm
by McGiever
And this is Honeywell's addition:

HONEYWELL L7224U 1002 AQUASTAT high low limit relay boiler control

Honeywell-L7224U1002-120-Vac-Oil-Electronic-Aquastat

Re: 520 operating control

Posted: Wed. Mar. 14, 2018 2:29 pm
by franpipeman
thanks everyone Mine is like 50 years old and I have a freebee untested Sid Harvery rebuilt i thought i should get shopping