Siemens Combustion QRA4M.U Scanner 319847-401 this unit eliminates the mechanical

this unit eliminates the mechanical failure points found in traditional float-style controls

provided the system's static pressure requirements align with the unit's 3212 RPM rating

Patching a cracked AC drain pan is often a temporary fix that leads to repeat service calls once the sealant fails under thermal expansion

designed to close the circuit once the system pressure falls back to the 420 PSIG threshold

Siemens Combustion QRA4M.U Scanner 319847-401 this unit eliminates the mechanicalThe Siemens Combustion QRA4M. U is a high sensitivity UV flame scanner engineered for the rigorous supervision of gas or oil flames and ignition spark proving in intermittent burner operations. As a veteran grade flame detector, this sensor utilizes a specialized UV sensitive cell with two electrodes designed to ignite upon detecting radiation within the 190 to 270 nm spectral range. This ignition triggers the necessary current in the flame detector