How do I confirm if the THT0633 is the correct limit switch for my unit

With a 300 Ohm input impedance for current signals and a NEMA 1 housing

as incorrect set points can lead to intermittent nuisance trips or unsafe furnace operation

The Robertshaw 1950-018 Thermopile is a heavy-duty millivolt generator designed for self-powered gas control systems in commercial and residential heating applications

mounting orientation

IO Hvac Controls ESP-400 Control Panel THPU32HP7Y How do I confirm ifThe iO HVAC Controls ESP 400 is an advanced static pressure control module designed to modernize residential and light commercial zoning systems. This 4 zone ESP panel utilizes a proprietary algorithm and a high precision ZPA SPS static pressure sensor to maintain ideal duct pressure without the complexity of a bypass damper. By continuously monitoring the discharge air plenum, the ESP 400 detects when static pressure exceeds the user defined setpoint