The silver dot is typically located on the face or side of the limit switch body to designate the specifically calibrated 240-degree trip point used in Reznor factory specifications

you must install an R-3710 Series 0

Can this be used in CO2 systems

Durable Inshot Design: Constructed from heavy-duty aluminized steel to resist thermal fatigue and manifold-side corrosion

Heil Quaker ICP 17223000003376 Kit 323055-751 The silver dot is typicallyStreamline your next repair with the Heil Quaker ICP 17223000003376 Kit, a specialized 30K 36K FPM Retro Fit Kit designed for seamless integration with International Comfort Products (ICP) residential systems. As a veteran grade HVAC replacement part, this kit is engineered to maintain optimal static pressure and airflow velocity within 2. 5 to 3 ton air handling configurations. By utilizing a genuine OEM retrofit kit, you ensure that the internal