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Low limit; high limit + manual reset aquastat ?

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Posted by Bob Ross on September 02, 2004 at 13:10:10:

We manage a 3 story apartment house. Hydrotherm hot water boiler / furnace, although old, is in excellent condition. Casing actualy consists of 3 boilers; each one has a Honeywell L4600A thermostat, with it's own gas valve and it's own transformer. We have to install a high limit with manual reset switch on the boiler. It appears the only way to a) be able to control current temp and b) to be able to set a high limit temp and c) to have a manual reset for each "boiler" would be to install 3 aquastat's that can handle all 3 requirements for each "boiler". Plumber says this would be alot easier and less costly than re wiring current setup, a new transformer and then connect to a new aquastat.
Does anyone know if such an item exists ? Supplier says can't get such item from Honeywell; they originally suggested Honeywell L4006E-1607, but it won't do all three. Looking at Honeywell's web site, found Models L6190C; L6188A,B,C, and L6191A,B. These are in centrigrade, not fahrenheit. However, we need to be able to set temp anywhere from 100 to 180 degrees F with a high limit of 200 degrees F. Any ideas ? Thanks for time reading this long post.

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