Who makes the smallest hot water LWCO ?

tombig

Ever since I saw that puppy I wanted him. MM has a huge presence in my area with steam LWCO's. Just replaced a #67 yesterday on a '30's vintage Kewanee (6 flat). My suppliers are non stock because they're not code (yet) in Chicago. MM says they sell a lot of 'em out east 'cause it's code. I want it because it should be there. Tombig

Unknown

Were gonna be installing them

in some tight spots . I just installed a Weil Gold off the floor in a Levitt yesterday and was thinking real hard as to where to install one . I remember seeing one that looked like a probe with 2 wires coming out of it - not sure who makes it . If anyone used this one before - do the wires go to a remote LWCO control , or do they make one that can be wired into the burner circuit with those 2 wires ? This pic is one of the jobs that will require a LWCO - so the smallest LWCO is a must . Thanks for any help .

zeb_3

Try

Try Taco

Unknown

LWCO

McDonal Miller RB24. 3/4 male IP threads, looks like about the size of a capacitor. even has status lights on it :-)

wheels
www.avcosupply.com

hot_rod

4\" long and

about 1-3/4" diameter. 24 volt, very handy.

hot rod

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Unknown

yup thats the rb24

and I like the "cool" way that you show it!!!!!

:-)

I'm bring ning in my digital tommorrow!

Bruce

Where can I find

A Guard Dog up here in B.C. and how much are they? Bruce

chuck shaw

RB-24

Isnt the RB-24 the version for gas boilers? I cant find my M-M catalog at the moment, but I dont think that it is designed for an oil burner. The oil version of this is (I think) is the RB-120. Meaning, that the gas boiler will shut off by breaking the 24volt circuit, but you have to break the 120 volt circuit to shut off oil. I could be wrong, but this really sticks in my head.

Chuck Shaw

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Unknown

Thats tiny

I wonder if they make a 110 volt version of that one ? Thanks Hot Rod for the perspective shot .

Unknown

Im guessing

you could use it with a relay to cut out the burner . Would the transformer in an Argo relay have enough juice to power up the RB 24 ?

Bob Gagnon plumbing and heating

could i use those

in the place of the place of regular mcdonald miller with a float that comes with an old steam boiler. bob

Unknown

RB120

Chuck,

Ooops, my mistake. You are correct. RB120 is for 120V, RB24 is for 24V.

Thanks!!

wheels

Unknown

RB24 for steam

In a word.... NO.

Strictly for water boilers.

wheels

Unknown

120V LWCO

yes, RB120, and the are the same size. About $15 morethen the 24V version but still cheaper then adding a relay :-)

Unknown

NEWS FLASH EDUCATION

OK, so here I am standing corrected. Follow the links PLEASE.

the RB24 is 24v and is seen in HR's picture. SMALL
http://www.mcdonnellmiller.com/prod/RB122lwco.pdf

the RB122 is 120V about 1-1/2 times the size of the RB24 but does not stick out any further. http://www.mcdonnellmiller.com/prod/RB122lwco.pdf

the RB120 is about 6 times the size.
http://www.mcdonnellmiller.com/prod/RB120lwco.pdf


the RB122 is about the same cost as the RB24.


Sorry for the confusion.

chris anderson

who makes the smallest l.w.c.o

Yes you can power a RB-24 off an Argo circulator relay but it is better to use the xfmr in the boiler primary control to power it. There is more spare power at that point and since the primary objective is kill the burner circuit in the case of a low water condition, it makes the most sense to aquire the power needed from there.