The Fuel Smart HydroStat Plus is a universal temperature limit control with optional boiler reset – either traditional outdoor reset with the use of Hydrolevels OS-100 outdoor sensor kit, or HydroStats internal Thermal Targeting technology a load matching, energy saving algorithm that dynamically changes the temperature high limit to the minimum temperature necessary to meet heating demand. When used with a Hydrolevel Electrowell the control also provides low water cutoff protection. Use with existing wells by others allows for temperature limit only.

It can be set to maintain low temperature for warm start and tankless coil boilers. The control also features a programming mode that allows the user to access special operation features such as thermal pre purge, LWCO manual reset, circulator hold-off, and LWCO on/off. Controls use the same terminal designations as standard aquastats.

The 3200 is used for gas boilers, warm start or cold start, now with thermal targeting feat