In heavy-duty commercial boiler environments

the kit comes complete with a copper bulb strap

which is critical for protecting the gas valve on high-efficiency equipment

but avoid sharp kinks or bends in the capillary tube during installation to ensure accurate sensing

or modulating control signals

Lochinvar & A.O. Smith 100208835 Thermostat Control Freon In heavy-duty commercial boiler environmentsMaintain precise thermal regulation in high demand heating systems with the Lochinvar & A. O. Smith 100208835 Thermostat Control. This professional grade 2 stage thermostat is an OEM replacement designed to drop directly into Copper Fin CB and CW series boilers (models 497747) as well as various Lochinvar and A. O. Smith water heaters. Also recognized by part numbers TST2314 and TST2314K, this control is the verified successor to the discontinued