the P291-3554RS features a non-PCB

Measuring 10" x 8"

This model requires a 120Vac 60Hz (or 110Vac 50Hz) power source and utilizes a standard Class F coil

it ensures consistent belt alignment and optimal power transfer from the drive motor to the fan shaft

While designed for 2-stage heaters

Lochinvar & A.O. Smith 100093749 Thermostat 321894-709 the P291-3554RS features a non-PCBThe Lochinvar & A. O. Smith 100093749 Thermostat Kit is a critical OEM replacement part for maintaining thermal calibration in residential and commercial water heaters and boilers. Designed as a direct swap for the R110 control, this kit features a 1. 5 inch shank and a 42. 75K LP low pressure sensor, ensuring precise signal feedback to the burner assembly. This thermostat is optimized for natural gas and propane (LP) fire ups where precise