01" orifice diameter is engineered for the exact volumetric flow of natural gas required by compatible Lennox furnace pilots

Always ensure the mounting flange is free of old gasket debris

Key Benefits Enhanced System Safety: Mechanically limits setpoint adjustments to prevent equipment operation outside of specified pressure ranges

While the coppered finish provides corrosion resistance

providing the necessary resilience to withstand the thermal cycling and chemical exposure typical of condensing boiler components

Carrier HH18HA452 Rollout Switch 01" orifice diameter is engineeredThe Carrier HH18HA452 Rollout Switch is a critical safety component designed for furnace flame rollout protection in high efficiency gas fired heating systems. This SPST (Single Pole Single Throw) limit switch is engineered to open the electrical circuit when it detects excessive heat concentrations, indicating a potential draft issue or heat exchanger compromise. Operating with a fixed temperature trip point of 250 degrees F, this manual reset