On the side of your Honeywell Aquastat is a copper sensor. Vertically mount the Aquastat, slide the well over the copper sensor and fasten with a coupling or bushing. Emerge the well into the boiler water- the copper sensor and copper well allow for the transfer of heat but not the transfer of water. Regardless of the type of boiler you have, an Aquastat acts as a safety device for measuring the temperature and assuring that it does not go too high.
Honeywell Aquastats with different model numbers can serve different functions, but all Aquastats require a well. In some cases, the Aquastat will turn the boiler on and off, and some check the water level, temperature, and/or pressure. Make sure that your Aquastat meets the specifications required to perform the functions needed by your boiler and that the well is of the proper size.
Honeywell Aquastats and Honeywell Aquastat Wells can be found at www.supplyhouse.com
